GEOLOGICAL SURVEY CIRCULAR 873 

International Geomagnetic 

Reference Field 1980-

Charts and Grid Values 

(IAGA Bulletin No. 47) 

International Geomagnetic 

Reference Field 1980-

Charts and Grid Values 

(IAGA Bulletin No. 47) 

By E. B. Fabiano, N. W. Peddie, 

D. R. Barraclough, and A. K. Zunde 

GEOLOGICAL SURVEY CIRCULAR 873 

1983 
United States Department of the Interior 

JAMES G. WATT/ Secretary 

Geological Survey 

Dallas L. Peck/ Director 
Explanation . . . . . . . . . . . . . . . . . 

References cited . . . . . . . . . . . . . . . 

Grid values of the magnetic field (5°X5°) 

Declination (D) . . . . . 

Inclination (/) . . . . . . 

Horizontal intensity (H) 

North component (X) 

East component (Y) . 

Vertical intensity (Z) 

Total intensity (F) 

Charts ........ . 

Declination (D) . . . . 

Annual change of declination (D) 

Inclination (I) . . . . . . . . . . 

Annual change of inclination (i) . 

CONTENTS 

Page 

1 Charts-Continued 

3 Horizontal intensity (H) . . . . . . . . . . 

5 Annual change of horizontal intensity (Ii) 

6 North component (.X) . . . . . . . . . . . 

14 Annual change of north component (XJ. 

22 East component (Y) . . . . . . . . . . . 

30 Annual change of east component (}) . 

38 Vertical intensity (Z) . . . . . . . . . . . 

46 Annual change of vertical intensity (Z) . 

54 Total intensity (F) . . . . . . . . . . . . 

63 Annual change of total intensity (i') . . 

64 Grid values of total magnetic intensity (F) (2° x 2°) 

65 Appendix: Spherical hannonic coefficients for the 

66 International Geomagnetic Reference Field 

67 (1965-1985) . . . . . . . . . . . . . . . . . . 

III 

Page 

68 

69 

70 

71 

72 

73 

74 

75 

76 

77 

79 

14:1 

INTERNATIONAL GEOMAGNETIC REFERENCE FIELD 

1980-CHARTS AND GRID VALUES 

(IAGA BULLETIN NO. 47) 

By E. B. Fabiano, N. W. Peddie, D. R. Barraclough1

, and A. K. Zunde 

EXPLANATION 

To satisfy the continuing needs for an accurate 

International Geomagnetic Reference Field, 

IAGA, at its Fourth Scientific Assembly, held in 

Edinburgh in August 1981, adopted a completely 

revised IGRF [IAGA Division I Working Group 

1, 1981]. The new IGRF has the following form: 

1. An International Geomagnetic Reference 

Field for the interval 1980.0 to 1985.0 (IGRF 

1980), consisting of a model of the main field 

at 1980.0 and a model of the secular variation 

for use in extending the main-field model up 

to 1985.0. 

2. A definitive International Geomagnetic Reference Field (DGRF) for the interval 1965.0 

to 1975.0, consisting of models of the main 

field at 1965.0 (DGRF 1965), 1970.0 (DGRF 

1970) and 1975.0 (DGRF 1975), with linear 

interpolation of the model coefficients for intervening dates. 

3. A provisional International Geomagnetic Reference Field for the interval 1975.0 to 1980.0 

(PGRF 1975), defined to be the linear interpolation of DGRF 1975 and IGRF 1980 (main 

field). 

DGRF models result from retrospective analysis 

and are definitive in the sense that further revision is not anticipated. PGRF 1975 now supersedes IGRF 1975 and will itself be superseded if 

and when a definitive model of the main field at 

1980.0., different from IGRF 1980, is adopted. 

1

1nstitute of Geological Sciences, Edinburgh, United Kingdom. 

DGRF 1965, DGRF 1970, DGRF 1975 and 

IGRF 1980 (including the forecast secular variation model) are series of spherical harmonics that 

describe the geomagnetic potential (V) and the 

field components by means of the expressions 

10 n 

V =a~ ~ (alr)n+l(gm cos mX. +hm sin mX.)P 111 (cos e)· 

""""" """"" n n u ' 

n=l m=O 

X'= (llr)(8V/8e); 

Y' =( -1/rsin e)(8V/8X.); 

Z'=BV/Br, 

where X', Y', and Z' are the northward, eastward, and radially downward components, respectively, of the geomagnetic field; a is the mean 

radius (6371.2 km) of the Earth; r is the distance 

from the center of the Earth; e is the (geocentric) 

colatitude; }\ is the east longitude; pm n (cos e) is 

the associated Legendre function of degree n and 

order m, in the Schmidt quasi-normalized form 

(Chapman and Bartels, 1940); gm n and hm n are 

spherical harmonic coefficients, of which there are 

120, up to and including m=n= 10 for the main 

field at 1965.0, 1970.0, 1975.0 and 1980.0; and 80, 

up to and including m = n = 8, for the secular variation for the interval 1980 to 1985. For computational purposes, the secular variation model can 

be regarded as having 120 coefficients, the last 

40 being zero. 
It is usual to work in geodetic rather than 

geocentric coordinates and to use field components 

(X, Y, Z) referred to this coordinate system. 

These, and the other commonly used geomagnetic 

elements, declination (D), inclination (1), horizontal intensity (H) and total intensity (F) can be 

computed from the geocentric components (X', Y', 

Z'). (See Malin and Barraclough, 1981). 

The coefficients of the revised IGRF are given 

in the Appendix. 

The table of contents may be used to locate the 

following tables and charts: 

(1) Grid values of D, I, H, Z and F at 1980.0 

at five-degree intervals of geographic latitude and 

longitude. The annual change during the interval 

1980 to 1985 is given as the second entry for each 

point. The D and I values are given to the nearest 

tenth of a degree and their annual change to the 

nearest tenth of a minute. The other components 

are given to the nearest nanotesla (1 nanotesla = 

1 gamma) and their annual change to the nearest 

tenth of a nanotesla. To adjust a 1980 value to 

a different dated between 1980 and 1985, multiply 

the associated value of annual change by the difference d-1980 and add (algebraically) the result 

to the 1980 value. 

(2) Contour charts of D, I, H, Z, and F and 

corresponding charts of annual change (D, I, H, 

Z, and F) at 1980.0. The map projection is Mercator. The + 's and their associated numbers indicate the positions and values of extrema, that is, 

points where the magnetic element attains either 

a maximum or a minimum value. 

(3) Values ofF on a 2° by 2° grid. 

The tables and charts give values at the Earth's 

surface, using the International Ellipsoid of 

equatorial radius 6378.160 km and flattening 11 

298.25 (International Astronomical Union, 1966). 

Here, east declination and downward inclination 

are indicated by positive values, and west declination and upward inclination are indicated by negative values. 

The annual change values are the differences between main-field values for 1980.0 and 1981.0. 

To derive values for positions between grid 

points, second-difference interpolation should be 

2 

used for greater accuracies. Iffb / 0,/1 are successive grid values, then/p, the value at a point intermediate between / 0 and / 1, is given by 

(p=/o+Pif1-fo)+Gd, where G=0.5p(p-1); 

d = / 1 -2/0+[1 and p=fractional distance between 

the grid points associated with / 0 and / 11 respectively. 

For some requirements, however, linear interpolation may be satisfactory. This is true particularly for F because of the closer tabular grid spacing. Fabiano and Peddie (1969) have shown that, 

for the corresponding F tables of IGRF 1965 (also 

2° by 2° grid), the maximum error due to using 

linear interpolation is about 20 nanotesla. As a 

guide to where the second difference, d, is important, note that the maximum numerical value of 

G is 0.125, corresponding top= 0.5. 

The first International Geomagnetic Reference 

Field, IGRF 1965, was adopted by the International Association of Geomagnetism and Aeronomy 

(IAGA) in 1968 (IAGA Commission 2 Working 

Group 4, 1969). It consists of a model of the main 

geomagnetic field at 1965.0, with a model of the 

secular variation for use in extending the mainfield model in time, both backward (not earlier 

than 1955.0) and forward (not later than 1975.0). 

An updated version, IGRF 1975, adopted later, 

consists of IGRF 1965 extended to 1975.0, along 

with a revised model of the secular variation for 

use in extending the main-field model up to 1980.0 

(IAGA Division I Study Group, 1975). 

IGRF 1965 and IGRF 1975 are no longer acceptably accurate representations of the geomagnetic 

field because of the cumulative effect of the uncertainties in the secular variation models. 

For information regarding the availability of the 

coefficients in computer-readable form, and computer programs for synthesizing field values, write 

to World Data Center A for Rockets and Satellites, Code 601, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA; or World Digital 

Data Center C1, Geomagnetism Unit, Institute of 

Geological Sciences, Murchison House, West 

Mains Road, Edinburgh EH9 3LA, United Kingdom; or World Data Center A, National Oceanic 

and Atmospheric Administration, EDIS/NGSDC 

(D62), 325 Broadway, Boulder, CO 80303, USA. 
REFERENCES CITED 

Chapman, S. and Bartels, J., 1940, Geomagnetism: Oxford, 

Clarendon Press, p. 611-612. 

Fabiano, E. B. and Peddie, N. W., 1969, Grid values of total 

magnetic intensity IGRF-1965: U.S. Coast and Geodetic 

Survey Technical Report 38, 55 p. 

IAGA Commission 2 Working Group 4, 1969, International 

Geomagnetic Reference Field 1965.0: Journal of Geophysical Research, v. 74, p. 4407-4408; 1969, Journal of 

Geomagnetism and Geoelectricity, v. 21, 569; 1969, 

Geomagnetism and Aeronomy, v. 72, p. 956. 

IAGA Division I Study Group on Geomagnetic Reference 

Fields, 1975, International Geomagnetic Reference Field 

1975, Journal of Geomagnetism and Geoelectricity, v. 27, 

3 

437-439; 1976, Geophysical Journal of the Royal Astronomical Society, v. 44, p. 733-734; 1976, Journal of Geophysical 

Research, v. 81, 5163-5164; 1977, Geomagnetism and 

Aeronomy, v. 17, p. 167-169. 

IAGA Division I Working Group 1, 1981, International 

Geomagnetic Reference Fields: DGRF 1965, DGRF 1970, 

DGRF 1975, and IGRF 1980, EOS, v. 62, 1169. See also 

Barraclough, D. R., 1981, The 1980 Geomagnetic Reference Field: Nature, v. 294, p. 14-15. 

International AstronomiGal Union, 1966, Proceedings of the 

Twelfth General Assembly, Hamburg, Germany: International Astronomical Union, Transactions, v. 128, p. 594-

595. 

Malin, S. R. C. and Barraclough, 1981. An algorithm for synthesizing the geomagnetic field: Computers and Geosciences, 1981, v. 7, p. 401-406. 

GRID VALUES OF THE MAGNETIC FIELD (5° X 5°) 
0. 

LONG 

LAT 

90 

IGRF 1980 DECLINATION (D) 

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

-35.1 -30.1 -25.1 -20.1 -15.1 -10.1 -5.1 -0.1 4.9 9.9 14.9 19.9 24.9 29.9 34.9 39.9 44.9 49.9 54.9 

19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 

85 -18.2 -13.6 -9.1 -4.6 -0.2 4.1 8.3 12.4 16.4 20.3 24.1 27.8 31.2 34.5 37.5 40.3 42.8 44.9 46.6 

16.5 16.1 15.7 15.4 15.0 14.7 14.3 14.0 13.7 13.3 13.0 12.6 12.2 11.7 11.2 10.5 9.7 8.6 7.3 

80 -13.9 -9.6 -5.4 -1.2 2.9 6.9 10.8 14.5 18.2 21.6 24.8 27.9 30.6 33.0 34.9 36.3 37.1 37.0 35.8 

14.5 13.9 13.4 12.9 12.3 11.8 11.2 10.6 10.0 9.5 8.8 8.2 7.4 6.6 5.7 4.5 3.0 1.0 -1.7 

75 -12.0 -8.0 -4.1 -0.3 3.5 7.1 10.6 14.0 17.2 20.1 22.9 25.3 27.4 29.0 30.1 30.5 30.0 28.4 25.5 

13.4 12.7 12.1 11.4 10.7 9.9 9.2 8.4 7.6 6.8 5.9 5.0 4.1 3.1 2.0 0.6 -1.0 -2.9 -5.3 

70 -10.6 -7.0 -3.5 o.o 3.3 6.5 9.5 12.4 15.1 17.6 19.8 21.8 23.3 24.3 24.8 24.5 23.3 21.1 17.7 

12.5 11.8 11.1 10.3 9.5 8.6 7.7 6.8 5.8 4.8 3.8 2.9 1.9 0.9 -0.1 -1.2 -2.4 -3.7 -5.1 

65 -9.2 -6.1 -3.0 o.o 2.8 5.6 8.1 10.5 12.8 14.8 16.5 18.0 19.1 19.7 19.8 19.1 17.7 15.5 12.3 

11.5 10.9 10.2 9.4 8.5 7.6 6.6 5.5 4.5 3.5 2.5 1.6 0.7 -0.1 -0.9 -1.6 -2.3 -3.0 -3.7 

60 -7.9 -5.1 -2.5 0.1 2.4 4.7 6.8 8.7 10.5 12.0 13.4 14.5 15.2 15.5 15.4 14.6 13.3 11.3 8.6 

10.6 10.0 9.3 8.5 7.7 6.7 5.7 4.6 3.6 2.6 1.7 0.8 0.1 -0.5 -1.0 -1.4 -1.7 -2.0 -2.3 

55 -6.6 -4.2 -2.0 0.2 2.1 3.9 5.5 7.0 8.4 9.5 10.5 11.3 11.8 11.9 11.7 11.0 9.8 8.1 5.9 

50 

9.7 9.2 8.5 7.8 7.0 6.0 5.0 4.0 3.0 2.0 1.2 0.5 -0.1 -0.5 -0.9 -1.0 -1.1 -1.2 -1.2 

-5.6 -3.5 -1.5 

9.0 8.5 7.9 

0.2 

7.3 

1.8 

6.5 

3.3 

5.5 

4.5 

4.5 

5. 6 

3.5 

6.6 

2.6 

7.4 

1.7 

8.1 

1.0 

8.6 8.8 8.8 8.5 7.9 7.0 5.6 3.9 

0.4 -0.1 -0.4 -0.6 -0.7 -0.7 -0.7 -0.6 

45 -4.9 -3.0 -1.3 0.2 1.5 2.7 3.7 4.5 5.2 5.7 6.1 6.3 6.4 6.3 6.0 5.4 4.7 3.7 2.4 

8.4 8.0 7.5 6.9 6.1 5.2 4.3 3.3 2.4 1.6 0.9 0.4 o.o -0.3 -0.5 -0.5 -0.5 -0.4 -0.3 

40 -4.4 -2.7 -1.2 0.1 1.2 2.2 3.0 3.6 4.1 4.4 4.5 4.6 4.5 4.2 3.9 3.4 2.9 2.2 1.3 

8.0 7.7 7.2 6.7 5.9 5.1 4.1 3.2 2.4 1.7 1.1 0.6 0.2 -0.2 -0.4 -0.5 -0.5 -0.4 -0.3 

35 -4.2 -2.6 -1.3 -0.1 0.9 1.7 2.4 2.9 3.2 3.4 3.3 3.2 2.9 2.6 2.2 1.8 1.4 1.0 0.4 

7.7 7.4 7.1 6.6 5.9 5.1 4.2 3.3 2.6 1.9 1.3 0.9 0.4 o.o -0.3 -0.5 -0.6 -0.6 -0.5 

30 -4.1 -2.7 -1.4 -0.4 0.5 1.2 1.8 2.3 2.5 2.6 2.4 2.1 1.7 1.3 0.9 0.5 0.3 0.1 -0.2 

7.4 7.3 7.0 6.6 6.0 5.2 4.4 3.6 2.8 2.2 1.7 1.2 0.7 0.2 -0.2 -0.6 -0.8 -0.8 -0.8 

25 -4.3 -2.9 -1.8 -0.8 o.o 0.8 1.4 1.8 2.0 2.0 1.7 1.2 0.7 0.2 -0.2 -0.5 -0.6 -0.6 -0.6 

7.2 7.2 7.1 6.8 6.2 5.5 4.7 3.9 3.2 2.7 2.2 1.7 1.1 0.5 -0.2 -0.7 -1.0 -1.1 -1.1 

20 -4.8 -3.4 -2.2 -1.3 -o.5 o.3 o.9 1.3 1.5 1.4 1.1 o.5 -0.1 -0.1 -1.1 -1.4 -1.4 -1.2 -1.0 

7.1 7.2 7.2 7.0 6.5 5.9 5.1 4.3 3.7 3.1 2.6 2.1 1.4 0.7 -0.1 -0.8 -1.3 -1.5 -1.5 

15 -5.4 -4.0 -2.9 -1.9 -1.1 -0.3 0.4 0.9 1.1 1.0 0.5 -0.2 -0.9 -1.5 -2.0 -2.1 -2.0 -1.7 -1.2 

7.0 7.2 7.4 7.3 7.0 6.3 5.6 4.8 4.1 3.5 3.0 2.4 1.7 0.8 -0.1 -1.0 -1.6 -1.9 -2.0 

10 -6.4 -5.0 -3.8 -2.8 -1.8 -0.9 -0.1 0.4 0.6 0.4 -0.1 -0.9 -1.7 -2.4 -2.8 -2.9 -2.7 -2.2 -1.5 

6.9 7.3 7.7 7.8 7.5 7.0 6.2 5.3 4.6 3.9 3.3 2.6 1.8 0.8 -0.3 -1.2 -1.9 -2.4 -2.5 

5 -7.9 -6.3 -5.0 -3.8 -2.7 -1.7 -0.7 -0.1 o.o -0.3 -0.9 -1.8 -2.7 -3.5 -3.9 -3.9 -3.5 -2.8 -2.0 

6.7 7.4 8.0 8.4 8.3 7.7 6.9 5.9 s.o 4.1 3.4 2.6 1.1 o.6 -o.5 -1.5 -2.4 -2.9 -3.1 

0 -9.8 -8.1 -6.6 -5.3 -3.9 -2.6 -1.6 -0.9 -0.8 -1.2 -2.1 -3.1 -4.1 -4.9 -5.2 -5.1 -4.6 -3.7 -2.6 

6.6 7.5 8.5 9.1 9.2 8.7 7.7 6.5 5.2 4.1 3.2 2.3 1.4 0.3 -0.9 -2.0 -2.8 -3.4 -3.6 
"' 

LONG 

LAT 

90 

IGRF 1980 DECLINATION (D) 

90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 

54.9 59.9 64.9 69.9 74.9 79.9 84.9 89.9 94.9 99.9 104.9 109.9 114.9 119.9 124.9 129.9 134.9 139.9 144.9 

19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 

85 46.6 47.9 48.5 48.6 48.0 46.7 44.9 42.6 40.2 37.9 36.0 34.7 34.2 34.5 35.5 37.3 39.8 42.9 46.7 

7.3 5.5 3.3 0.3 -3.3 -7.7 -12.6 -17.7 -22.5 -26.6 -29.5 -31.4 -32.4 -32.7 -32.7 -32.4 -32.2 -32.1 -32.2 

80 35.8 33.3 29.4 24.1 17.7 11.1 5.2 0.4 -2.8 -4.5 -5.0 -4.5 -3.1 -1.0 1.5 4.5 7.9 11.6 15.5 

-1.7 -5.2 -9.5 -14.4 -18.8 -21.8 -22.8 -22.0 -20.3 -18.2 -16.2 -14.5 -13.0 -11.7 -10.7 -10.0 -9.4 -9.1 -8.9 

75 25.5 21.2 15.5 9.0 2.3 -3.7 -8.3 -11.5 -13.3 -13.8 -13.4 -12.1 -10.1 -7.6 -4.7 -1.5 2.0 5.7 9.6 

-5.3 -8.1 -10.9 -13.2 -14.5 -14.5 -13.6 -12.2 -10.7 -9.3 -8.0 -6.9 -6.0 -5.3 -4.7 -4.2 -3.8 -3.6 -3.4 

70 17.7 13.2 7.9 2.1 -3.5 -8.3 -11.9 -14.4 -15.6 -15.8 -15.1 -13.8 -11.8 -9.3 -6.4 -3.2 0.3 3.9 7.7 

-5.1 -6.6 -7.8 -8.7 -9.0 -8.8 -8.2 -7.4 -6.6 -5.8 -5.0 -4.3 -3.7 -3.2 -2.7 -2.4 -2.0 -1.8 -1.7 

65 12.3 8.3 3.8 -1.0 -5.5 -9.4 -12.4 -14.4 -15.5 -15.6 -15.0 -13.6 -11.7 -9.4 -6.6 -3.5 -0.2 3.3 6.9 

-3.7 -4.3 -4.8 -5.2 -5.4 -5.4 -5.2 -4.9 -4.5 -4.1 -3.6 -3.2 -2.8 -2.4 -2.1 -1.7 -1.5 -1.3 -1.1 

60 8.6 5.3 1.6 -2.3 -5.9 -9.2 -11.7 -13.5 -14.4 -14.6 -14.0 -12.8 -11.0 -8.8 -6.1 -3.2 o.o 3.3 6.6 

-2.3 -2.5 -2.7 -3.0 -3.2 -3.3 -3.4 -3.3 -3.2 -3.1 -2.8 -2.6 -2.4 -2.1 -1.9 -1.6 -1.4 -1.2 -1.1 

55 5.9 3.3 0.3 -2.8 -5.8 -8.5 -10.6 -12.2 -13.1 -13.2 -12.7 -11.6 -10.0 -7.9 -5.4 -2.6 0.4 3.5 6.7 

50 

-1.2 -1.3 -1.4 -1.6 -1.8 -2.1 -2.2 -2.4 -2.4 -2.4 -2.3 -2.2 -2.1 -2.0 -1.8 -1.7 -1.5 -1.3 -1.2 

3.9 1.9 -0.4 -2.9 -5.3 -7.5 -9.4 -10.8 -11.5 -11.7 -11.3 -10.2 -8.7 -6.7 -4.3 -1.7 1.1 4.0 6.9 

-0.6 -0.6 -0.7 -0.8 -1.1 -1.4 -1.6 -1.7 -1.8 -1.8 -1.8 -1.8 -1.8 -1.8 -1.8 -1.8 -1.7 -1.5 -1.4 

45 2.4 0.9 -0.8 -2.7 -4.6 -6.4 -8.0 -9.2 -9.9 -10.1 -9.7 -8.7 -7.2 -5.3 -3.1 -0.6 2.0 4.7 7.3 

-0.3 -0.3 -0.3 -0.5 -0.8 -1.0 -1.3 -1.4 -1.5 -1.5 -1.5 -1.5 -1.5 -1.6 -1.7 -1.8 -1.8 -1.7 -1.5 

40 1.3 0.2 -1.0 -2.4 -3.9 -5.3 -6.6 -7.7 -8.3 -8.4 -8.0 -7.0 -5.6 -3.8 -1.6 0.7 3.2 5.6 7.9 

-0.3 -0.3 -0.3 -0.5 -0.7 -1.0 -1.3 -1.4 -1.4 -1.3 -1.2 -1.1 -1.1 -1.3 -1.5 -1.7 -1.8 -1.7 -1.6 

35 0.4 -0.2 -1.0 -2.0 -3.1 -4.2 -5.3 -6.1 -6.6 -6.7 -6.2 -5.3 -3.9 -2.1 -0.1 2.2 4.4 6.5 8.5 

-0.5 -0.4 -0.5 -0.7 -0.9 -1.3 -1.5 -1.6 -1.5 -1.3 -1.0 -0.8 -0.7 -0.8 -1.1 -1.3 -1.5 -1.6 -1.4 

30 -0.2 -0.5 -0.9 -1.6 -2.3 -3.2 -4.0 -4.6 -5.0 -4.9 -4.4 -3.5 -2.1 -0.4 1.5 3.6 5.7 7.5 9.2 

-0.8 -0.7 -0.8 -1.0 -1.3 -1.6 -1.9 -2.0 -1.8 -1.4 -0.9 -0.5 -0.3 -0.3 -0.5 -0.8 -1.1 -1.1 -1.0 

25 -0.6 -0.6 -0.8 -1.1 -1.6 -2.2 -2.8 -3.2 -3.4 -3.3 -2.7 -1.8 -0.4 1.3 3.1 5.0 6.9 8.5 9.7 

-1.1 -1.1 -1.1 -1.3 -1.7 -2.1 -2.4 -2.4 -2.2 -1.6 -0.9 -0.3 0.2 o.3 0.2 -0.1 -o.4 -0.5 -o.5 

20 -1.0 -0.7 -0.6 -0.6 -0.9 -1.2 -1.6 -1.9 -2.0 -1.7 -1.1 -0.1 1.2 2.8 4.5 6.3 7.9 9.2 10.2 

-1.5 -1.5 -1.6 -1.7 -2.1 -2.5 -2.8 -2.8 -2.5 -1.9 -1.0 -0.1 0.5 0.9 0.9 0.7 0.4 0.2 0.1 

15 -1.2 -0.8 -0.4 -0.2 -0.2 -0.4 -0.6 -0.7 -0.7 -0.3 0.4 1.4 2.7 4.2 5.7 7.3 8.7 9.8 10.5 

-2.0 -2.0 -2.0 -2.2 -2.5 -2.8 -3.1 -3.1 -2.8 -2.0 -1.0 o.o 0.9 1.4 1.5 1.4 1.2 0.9 0.8 

10 -1.5 -0.8 -0.3 0.2 0.3 0.3 0.3 0.3 0.5 0.9 1.7 2.7 3.9 5.3 6.7 8.1 9.3 10.1 10.6 

-2.5 -2.5 -2.5 -2.5 -2.8 -3.1 -3.3 -3.2 -2.8 -2.0 -0.9 0.3 1.2 1.8 2.1 2.0 1.8 1.6 1.4 

5 -2.0 -1.0 -0.2 0.4 0.7 0.9 1.0 1.1 1.4 2.0 2.8 3.8 4.9 6.2 7.5 8.7 9.7 10.4 10.7 

-3.1 -3.0 -2.9 -2.9 -3.0 -3.1 -3.2 -3.1 -2.6 -1.7 -0.6 0.5 1.5 2.2 2.5 2.5 2.4 2.2 1.9 

0 -2.6 -1.5 -0.4 0.4 1.0 1.3 1.5 1.8 2.2 2.8 3.6 4.6 5.8 6.9 8.1 9.2 10.0 10.6 10.9 

-3.6 -3.5 -3.3 -3.2 -3.1 -3.0 -3.0 -2.7 -2.2 -1.3 -0.2 0.9 1.8 2.5 2.8 2.9 2.8 2.6 2.3 
00 

LONG 

LAT 

90 

85 

IGRF 1980 DECLINATION (D) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

144.9 149.9 154.9 159.9 164.9 169.9 174.9 179.9-175.1-170.1-165.1-160.1-155.1-150.1-145.1-140.1-135.1-130.1-125.1 

19.0 19.0 19.0 19.0 19.0 19.0 19.0-999.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 

46.7 51.1 56.1 61.7 68.1 75.5 83.9 93.7 105.2 118.7 134.3 151.3 168.7-175.0-160.5-147.9-137.0-127.4-118.9 

-32.2 -32.6 -33.1 -34.0 -35.0 -36.0 -36.9 -36.9 -35.1 -29.7 -19.3 -4.3 11.7 24.2 31.5 34.5 34.9 34.1 32.6 

80 15.5 19.6 23.9 28.3 33.0 37.7 42.7 47.8 53.2 59.0 65.4 72.8 82.2 96.3 124.4-178.9-137.3-118.6-107.6 

-8.9 -8.9 -9.2 -9.6 -10.3 -11.3 -12.6 -14.5 -16.9 -20.3 -25.1 -32.1 -42.9 -59.2 -63.0 64.3 91.5 68.2 52.7 

75 9.6 13.6 17.8 21.9 26.1 30.3 34.4 38.5 42.5 46.3 50.0 53.4 56.4 58.5 58.5 51.5 -3.6 -68.9 -77.6 

-3.4 -3.4 -3.6 -3.9 -4.4 -5.1 -6.0 -7.2 -8.9 -11.0 -14.0 -18.2 -24.6 -35.2 -55.6-106.8 -98.6 95.6 64.3 

70 7.7 11.5 15.4 19.3 23.1 26.8 30.3 33.7 36.8 39.5 41.8 43.6 44.3 43.6 40.3 31.9 14.3 -13.2 -37.0 

-1.7 -1.7 -1.8 -2.1 -2.6 -3.2 -4.1 -5.2 -6.6 -8.4 -10.8 -13.9 -18.1 -23.9 -32.1 -42.2 -44.4 -15.5 17.7 

65 6.9 10.5 14.2 17.7 21.1 24.3 27.3 30.0 32.4 34.3 35.7 36.3 36.0 34.3 30.6 24.1 13.6 -0.6 -16.0 

-1.1 -1.1 -1.3 -1.5 -2.0 -2.6 -3.5 -4.5 -5.8 -7.4 -9.4 -11.8 -14.6 -18.1 -22.1 -25.5 -25.8 -18.9 -5.5 

60 6.6 10.0 13.4 16.6 19.6 22.3 24.8 27.0 28.7 29.9 30.6 30.7 29.8 27.9 24.6 19.5 12.4 3.2 -7.1 

-1.1 -1.0 -1.1 -1.4 -1.8 -2.4 -3.3 -4.3 -5.5 -6.9 -8.4 -10.2 -12.2 -14.3 -16.3 -17.9 -18.0 -15.4 -9.7 

55 6.7 9.8 12.8 15.6 18.2 20.6 22.6 24.2 25.5 26.3 26.5 26.2 25.2 23.4 20.6 16.6 11.3 4.8 -2.7 

50 

-1.2 -1.1 -1.2 -1.4 -1.8 -2.3 -3.1 -4.1 -5.2 -6.3 -7.6 -8.8 -10.1 -11.4 -12.6 -13.5 -13.8 -12.7 -10.0 

6.9 9.7 12.4 14.8 17.0 19.0 20.6 21.8 22.7 23.2 23.2 22.7 21.8 20.1 17.8 14.6 10.5 5.5 -0.3 

-1.4 -1.2 -1.2 -1.3 -1.7 -2.2 -3.0 -3.8 -4.8 -5.7 -6.6 -7.5 -8.3 -9.1 -9.9 -10.6 -11.1 -10.9 -9.7 

45 7.3 9.8 12.1 14.1 16.0 17.5 18.8 19.7 20.3 20.6 20.4 20.0 19.0 17.7 15.7 13.2 9.9 5.9 1.3 

-1.5 -1.3 -1.2 -1.2 -1.5 -2.0 -2.7 -3.5 -4.4 -5.1 -5.7 -6.2 -6.7 -7.2 -7.8 -8.5 -9.1 -9.5 -9.3 

40 7.9 10.0 11.9 13.5 15.0 16.2 17.1 17.8 18.2 18.3 18.1 17.6 16.8 15.7 14.1 12.0 9.4 6.1 2.2 

-1.6 -1.3 -1.1 -1.1 -1.3 -1.8 -2.5 -3.2 -3.9 -4.4 -4.7 -4.9 -5.1 -5.4 -5.9 -6.7 -7.6 -8.5 -8.9 

35 8.5 10.2 11.7 12.9 14.0 14.8 15.5 16.0 16.2 16.2 16.0 15.6 14.9 14.0 12.7 11.0 8.9 6.2 2.9 

-1.4 -1.1 -0.9 -0.9 -1.2 -1.7 -2.3 -2.9 -3.4 -3.6 -3.6 -3.5 -3.5 -3.7 -4.3 -5.2 -6.4 -7.6 -8.5 

30 9.2 10.5 11.5 12.3 13.0 13.5 13.9 14.2 14.4 14.4 14.2 13.8 13.3 12.5 11.5 10.2 8.4 6.2 3.5 

-1.0 -0.8 -0.7 -0.7 -1.0 -1.6 -2.2 -2.7 -2.9 -2.8 -2.5 -2.1 -1.9 -2.1 -2.8 -3.9 -5.4 -6.9 -8.1 

25 9.7 10.7 11.3 11.7 12.0 12.2 12.5 12.6 12.7 12.7 12.5 12.2 11.8 11.2 10.5 9.5 8.1 6.3 4.0 

-0.5 -0.4 -0.4 -0.5 -0.9 -1.5 -2.1 -2.4 -2.3 -1.9 -1.3 -0.6 -0.3 -0.6 -1.4 -2.8 -4.5 -6.2 -7.8 

20 10.2 10.8 11.0 11.1 11.0 11.1 11.2 11.3 11.3 11.2 11.1 10.9 10.6 10.2 9.6 8.9 7.9 6.4 4.4 

0.1 0.1 o.o -0.4 -0.9 -1.5 -2.0 -2.1 -1.8 -1.0 o.o 0.8 1.1 0.8 -0.3 -1.9 -3.8 -5.7 -7.4 

15 10.5 10.8 10.7 10.5 10.3 10.1 10.1 10.1 10.1 10.1 10.0 9.8 9.6 9.4 9.0 8.6 7.8 6.6 5.0 

0.8 0.6 0.3 -0.2 -0.8 -1.5 -1.9 -1.8 -1.2 -0.1 1.1 2.0 2.3 1.8 0.6 -1.2 -3.3 -5.3 -7.1 

10 10.6 10.7 10.5 10.1 9.8 9.5 9.4 9.4 9.4 9.3 9.2 9.0 8.9 8.8 8.7 8.4 7.9 7.0 5.5 

1.4 1.1 0.6 o.o -0.8 -1.4 -1.7 -1.4 -0.5 0.7 2.1 3.1 3.3 2.6 1.2 -0.8 -3.0 -5.1 -6.8 

5 10.7 10.7 10.4 9.9 9.5 9.2 9.1 9.0 9.0 8.9 8.8 8.7 8.6 8.6 8.6 8.5 8.2 7.4 6.2 

1.9 1.5 1.0 0.2 -0.6 -1.2 -1.4 -1.0 0.1 1.5 2.9 3.8 3.9 3.1 1.4 -0.7 -3.0 -5.0 -6.7 

0 10.9 10.8 10.5 10.0 9.6 9.3 9.2 9.1 9.0 8.9 8.8 8.7 8.6 8.7 8.8 8.8 8.6 8.0 6.9 

2.3 1.9 1.2 0.5 -0.3 -0.9 -1.1 -0.5 0.6 2.1 3.5 4.3 4.2 3.2 1.3 -0.9 -3.2 -5.1 -6.6 
"() 

IGRF 1980 DECLINATION (D) 

LONG -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

LAT 

90 -125.1-120.1-115.1-110.1-105.1-100.1 -95.1 -90.1 -85.1 -80.1 -75.1 -70.1 -65.1 -60.1 -55.1 -50.1 -45.1 -40.1 -35.1 

19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 19.0 

85 -118.9-111.1-104.0 -97.3 -91.0 -84.9 -79.1 -73.4 -67.9 -62.6 -57.3 -52.2 -47.1 -42.1 -37.2 -32.3 -27.5 -22.8 -18.2 

32.6 31.0 29.4 27.9 26.5 25.3 24.2 23.2 22.3 21.5 20.7 20.1 19.4 18.9 18.3 17.8 17.4 16.9 16.5 

80 -107.6 -99.4 -92.6 -86.5 -80.8 -75.4 -70.2 -65.2 -60.2 -55.4 -50.6 -45.8 -41.1 -36.4 -31.8 -27~3 -22.8 -18.3 -13.9 

52.7 43.1 36.8 32.4 29.1 26.6 24.7 23.1 21.8 20.7 19.7 18.9 18.1 17.4 16.8 l6.2 15.6 15.0 14.5 

75 -77.6 -77.9 -75.9 -73.0 -69.6 -65.9 -62.0 -58.0 -53.9 -49.7 -45.5 -41.3 -37.0 -32.8 -28.6 -24.4 -20.2 -16.1 -12.0 

64.3 47.8 38.6 32.8 28.9 26.1 23.9 22.2 20.9 19.7 18.8 17.9 17.2 16.5 15.8 15.2 14.6 14.0 13.4 

70 -37.0 -49.8 -55.3 -57.1 -56.8 -55.4 -53.2 -50.4 -47.3 -44.0 -40.5 -36.8 -33.1 -29.3 -25.5 -21.8 -18.0 -14.3 -10.6 

17.7 28.1 28.7 27.0 25.0 23.2 21.7 20.4 19.3 18.4 17.5 16.8 16.1 15.5 14.9 14.3 13.7 13.1 12.5 

65 -16.0 -28.8 -37.3 -42.2 -44.6 -45.1 -44.5 -4~.0 -40.8 -38.3 -35.5 -32.4 -29.2 -25.9 -22.5 -19.2 -15.8 -12.5 -9.2 

-5.5 6.9 14.2 17.5 18.6 18.7 18.3 17.8 17.2 16.5 15.9 15.3 14.8 14.2 13.7 13.2 12.7 12.1 11.5 

60 -7.1 -17.0 -25.1 -30.9 -34.6 -36.4 -36.9 -36.3 -35.0 -33.1 -30.8 -28.3 -25.5 -22.6 -19.6 -16.6 -13.7 -10.7 -7.9 

-9.7 -2.3 4.4 9.2 12.1 13.8 14.6 14.9 14.9 14.7 14.3 13.9 13.4 13.0 12.5 12.0 11.6 11.1 10.6 

55 -2.7 -10.4 -17.4 -23.0 -27.1 -29.6 -30.8 -30.9 -30.2 -28.8 -26.9 -24.7 -22.3 -19.7 -17.1 -14.4 -11.7 -9.1 -6.6 

-10.0 -5.8 -1.0 3.5 7.0 9.6 11.2 12.2 12.8 12.9 12.9 12.6 12.3 11.9 11.4 11.0 10.6 10.1 9.7 

50 -0.3 -6.4 -12.4 -17.6 -21.7 -24.6 -26.2 -26.7 -26.4 -25.4 -23.8 -21.9 -19.7 -17.4 -15.0 -12.6 -10.2 -7.8 -5.6 

-9.7 -7.3 -4.0 -0.3 3.1 6.1 8.3 9.8 10.9 11.4 11.6 11.6 11.3 11.0 10.5 10.1 9.7 9.3 9.0 

45 1.3 -3.9 -9.0 -13.8 -17.8 -20.8 -22.7 -23.5 -23.5 -22.8 -21.4 -19.7 -17.8 -15.6 -13.4 -11.2 -9.0 -6.9 -4.9 

-9.3 -8.1 -5.9 -3.1 0.1 3.1 5.6 7.6 9.1 10.0 10.5 10.7 10.6 10.3 9.9 9.5 9.1 8.7 8.4 

40 2.2 -2.1 -6.6 -11.0 -14.9 -18.0 -20.0 -21.2 -21.4 -20.9 -19.8 -18.2 -16.4 -14.4 -12.4 -10.3 -8.2 -6.2 -4.4 

-8.9 -8.6 -7.3 -5.1 -2.4 o.s 3.2 5.5 7.3 8.6 9.4 9.8 9.9 9.6 9.3 8.9 8.6 8.3 8.0 

35 2.9 -0.8 -4.8 -8.9 -12.6 -15.7 -18.0 -19.4 -19.8 -19.6 -18.7 -17.3 -15.6 -13.8 -11.8 -9.8 -7.8 -5.9 -4.2 

-8.5 -8.8 -8.2 -6.8 -4.6 -2.0 0.7 3.2 5.3 7.0 8.2 8.9 9.2 9.1 8.8 8.5 8.1 7.9 7.7 

30 3.5 0.2 -3.4 -7.1 -10.7 -13.9 -16.4 -18.0 -18.8 -18.8 -18.1 -16.9 -15.4 -13.6 -11.6 -9.6 -7.7 -5.8 -4.1 

-8.1 -8.9 -8.9 -8.0 -6.4 -4.3 -1.8 0.8 3.2 5.2 6.8 7.8 8.4 8.5 8.3 8.0 7.8 7.6 7.4 

25 4.0 1.1 -2.1 -5.6 -9.2 -12.4 -15.0 -17.0 -18.0 -18.3 -18.0 -17.0 -15.6 -13.8 -11.9 -9.9 -7.9 -6.0 -4.3 

-7.8 -8.8 -9.3 -9.0 -8.0 -6.3 -4.2 -1.7 0.9 3.2 5.2 6.6 7.5 7.9 7.8 7.6 7.4 7.3 7.2 

20 4.4 2.0 -1.0 -4.3 -7.8 -11.1 -14.0 -16.2 -17.6 -18.2 -18.2 -17.4 -16.1 -14.5 -12.5 -10.4 -8.4 -6.4 -4.8 

-7.4 -8.7 -9.4 -9.6 -9.2 -8.1 -6.4 -4.2 -1.6 1.1 3.4 5.3 6.6 7.2 7.4 7.3 7.1 7.0 7.1 

15 5.0 2.8 o.o -3.2 -6.6 -10.0 -13.0 -15.5 -17.3 -18.3 -18.6 -18.1 -17.0 -15.4 -13.5 -11.3 -9.1 -7.1 -5.4 

-7.1 -8.4 -9.4 -10.0 -10.1 -9.6 -8.4 -6.5 -3.9 -1.1 1.6 3.9 5.5 6.4 6.8 6.9 6.8 6.8 7.0 

10 5.5 3.5 1.0 -2.1 -5.5 -9.0 -12.2 -15.0 -17.2 -18.6 -19.2 -19.0 -18.2 -16.7 -14.8 -12.5 -10.3 -8.2 -6.4 

-6.8 -8.2 -9.3 -10.1 -10.7 -10.7 -10.1 -8.5 -6.1 -3.3 -0.3 2.3 4.3 5.6 6.2 6.4 6.4 6.6 6.9 

5 6.2 4.4 1.9 -1.1 -4.5 -8.0 -11.5 -14.6 -17.1 -18.8 -19.8 -20.0 -19.4 -18.2 -16.3 -14.1 -11.9 -9.7 -7.9 

-6.7 -8.0 -9.0 -10.1 -10.9 -11.5 -11.3 -10.1 -8.0 -5.2 -2.1 0.8 3.1 4.7 s.s 5.8 6.0 6.2 6.7 

0 6.9 5.2 2.8 -0.1 -3.5 -7.2 -10.8 -14.2 -17.0 -19.1 -20.4 -21.0 -20.7 -19.8 -18.2 -16.1 -13.9 -11.7 -9.8 

-6.6 -7.8 -8.8 -9.9 -11.0 -11.8 -12.1 -11.3 -9.5 -6.8 -3.7 -0.7 1.8 3.6 4.6 5.1 5.4 5.8 6.6 
0 

LONG 

LAT 

0 

IGRF 1980 DECLINATION (D) 

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

-9.8 -8.1 -6.6 -5.3 -3.9 -2.6 -1.6 -0.9 -0.8 -1.2 -2.1 -3.1 -4.1 -4.9 -5.2 -5.1 -4.6 -3.7 -2.6 

6.6 7.5 8.5 9.1 9.2 8.7 7.7 6.5 5.2 4.1 3.2 2.3 1.4 0.3 -0.9 -2.0 -2.8 -3.4 -3.6 

-5 -12.2 -10.4 -8.7 -7.1 -5.4 -3.9 -2.7 -2.1 -2.1 -2.7 -3.8 -5.0 -6.1 -6.8 -7.1 -6.9 -6.1 -5.0 -3.7 

6.2 7.6 8.9 9.9 10.2 9.7 8.5 6.9 5.3 3.9 2.7 1.7 0.8 -0.3 -1.3 -2.4 -3.3 -3.9 -4.1 

-10 -15.2 -13.3 -11.3 -9.4 -7.4 -5.7 -4.4 -3.8 -4.1 -5.0 -6.3 -7.7 -8.9 -9.6 -9.8 -9.3 -8.3 -6.9 -5.2 

5.7 7.5 9.3 10.7 11.3 10.7 9.2 7.1 5.0 3.1 1.7 0.7 -0.1 -0.9 -1.9 -2.8 -3.7 -4.3 -4.5 

-15 -18.4 -16.5 -14.4 -12.2 -10.0 -8.1 -6.9 -6.6 -7.2 -8.4 -10.0 -11.6 -12.8 -13.4 -13.3 -12.6 -11.4 -9.6 -7.5 

5.0 7.2 9.5 11.3 12.1 11.4 9.4 6.7 4.0 1.8 0.3 -0.6 -1.1 -1.6 -2.3 -3.1 -3.9 -4.6 -4.8 

-20 -21.6 -19.8 -17.7 -15.4 -13.2 -11.5 -10.5 -10.6 -11.6 -13.3 -15.1 -16.7 -17.8 -18.3 -18.0 -17.0 -15.4 -13.1 -10.6 

4.4 6.7 9.3 11.4 12.2 11.3 8.7 5.4 2.2 -0.2 -1.5 -2.0 -2.1 -2.2 -2.6 -3.2 -3.9 -4.6 -4.9 

-25 -24.3 -22.8 -21.0 -18.9 -17.0 -15.6 -15.3 -15.9 -17.5 -19.4 -21.4 -23.0 -23.9 -24.2 -23.7 -22.4 -20.4 -17.8 -14.8 

4.3 6.5 8.9 10.8 11.3 9.8 6.7 3.0 -0.2 -2.3 -3.2 -3.3 -3.0 -2.7 -2.7 -3.1 -3.8 -4.4 -4.9 

-30 -26.0 -24.9 -23.5 -22.0 -20.7 -20.2 -20.5 -21.8 -23.8 -25.9 -27.9 -29.5 -30.3 -30.5 -29.9 -28.5 -26.3 -23.5 -20.0 

4.9 6.6 8.3 9.5 9.1 6.9 3.6 o.o -2.8 -4.4 -4.8 -4.5 -3.8 -3.3 -3.1 -3.2 -3.8 -4.4 -5.0 

-35 -26.5 -25.9 -25.0 -24.3 -23.9 -24.2 -25.3 -27.1 -29.4 -31.7 -33.8 -35.4 -36.4 -36.7 -36.3 -35.0 -33.0 -30.1 -26.5 

6.1 7.1 7.8 7.7 6.3 3.6 0.3 -2.8 -5.1 -6.2 -6.3 -5.8 -5.1 -4.4 -4.0 -3.9 -4.3 -4.9 -5.5 

-40 -25.8 -25.7 -25.6 -25.6 -26.1 -27.2 -29.0 -31.2 -33.7 -36.2 -38.5 -40.3 -41.6 -42.3 -42.3 -41.5 -39.9 -37.4 -34.0 

7.4 7.6 7.2 5.9 3.7 0.7 -2.4 -5.1 -6.9 -7.7 -7.8 -7.4 -6.8 -6.1 -5.6 -5.4 -5.6 -6.0 -6.6 

-45 -24.4 -24.9 -25.4 -26.3 -27.6 -29.3 -31.6 -34.2 -36.9 -39.6 -42.1 -44.3 -46.0 -47.2 -47.8 -47.7 -46.9 -45.2 -42.4 

8.2 7.7 6.5 4.4 1.7 -1.3 -4.1 -6.5 -8.1 -9.0 -9.2 -9.0 -8.5 -8.0 -7.6 -7.3 -7.4 -7.7 -8.3 

-50 -22.7 -23.8 -25.1 -26.7 -28.5 -30.8 -33.4 -36.3 -39.2 -42.2 -44.9 -47.5 -49.7 -51.5 -52.8 -53.6 -53.7 -53.1 -51.5 

8.2 7.3 5.6 3.3 0.6 -2.2 -4.8 -6.9 -8.5 -9.5 -9.9 -10.0 -9.8 -9.5 -9.2 -9.1 -9.2 -9.5 -10.2 

-55 -21.3 -23.0 -24.8 -27.0 -29.3 -32.0 -34.9 -38.0 -41.2 -44.3 -47.4 -50.3 -53.0 -55.4 -57.4 -59.1 -60.3 -61.0 -60.9 

7.6 6.5 4.8 2.7 0.2 -2.2 -4.5 -6.4 -8.0 -9.0 -9.7 -10.0 -10.1 -10.1 -10.0 -10.0 -10.1 -10.5 -11.2 

-60 -20.1 -22.3 -24.8 -27.3 -30.1 -33.1 -36.3 -39.6 -42.9 -46.3 -49.7 -52.9 -56.1 -59.1 -61.8 -64.4 -66.6 -68.6 -70.1 

6.6 5.6 4.2 2.4 0.4 -1.6 -3.5 -5.1 -6.5 -7.6 -8.4 -9.0 -9.3 -9.5 -9.6 -9.7 -9.9 -10.3 -10.9 

-65 -19.4 -22.1 -25.0 -27.9 -31.0 -34.3 -37.7 -41.2 -44.8 -48.4 -52.0 -55.6 -59.2 -62.7 -66.1 -69.5 -72.7 -75.8 -78.8 

5.5 4.7 3.7 2.4 0.9 -0.6 -2.0 -3.4 -4.6 -5.6 -6.3 -6.9 -7.4 -7.7 -7.9 -8.1 -8.4 -8.7 -9.1 

-70 -19.2 -22.4 -25.6 -28.9 -32.3 -35.8 -39.5 -43.2 -47.0 -50.8 -54.7 -58.7 -62.6 -66.6 -70.6 -74.6 -78.6 -82.7 -86.9 

4.4 3.9 3.2 2.4 1.4 0.4 -0.6 -1.5 -2.4 -3.2 -3.9 -4.5 -4.9 -5.3 -5.5 -5.8 -6.0 -6.2 -6.4 

-75 -19.7 -23.2 -26.8 -30.4 -34.1 -37.9 -41.8 -45.8 -49.8 -53.9 -58.1 -62.4 -66.7 -71.0 -75.5 -80.0 -84.7 -89.4 -94.4 

3.4 3.2 2.8 2.3 1.7 1.2 0.6 o.o -0.6 -1.1 -1.6 -2.0 -2.4 -2.7 -3.0 -3.2 -3.4 -3.5 -3.7 

-80 -20.9 -24.8 -28.8 -32.8 -36.9 -41.0 -45.2 -49.5 -53.8 -58.2 -62.7 -67.2 -71.9 -76.6 -81.4 -86.3 -91.3 -96.5-101.8 

2.5 2.4 2.2 2.0 1.7 1.5 1.2 0.9 0.6 0.3 o.o -0.2 -0.4 -0.6 -0.8 -1.0 -1.1 -1.2 -1.3 

-85 -23.3 -27.7 -32.2 -36.6 -41.1 -45.6 -50.2 -54.8 -59.5 -64.2 -69.0 -73.8 -78.7 -83.7 -88.7 -93.8 -98.9-104.1-109.4 

1.6 1.6 1.5 1.4 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.4 0.3 0.2 0.2 

-90 -27.5 -32.5 -37.5 -42.5 -47.5 -52.5 -57.5 -62.5 -67.5 -72.5 -77.5 -82.5 -87.5 -92.5 -97.5-102.5-107.5-112.5-117.5 

0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 
LONG 

LAT 

0 

-5 

-10 

-15 

-20 

-25 

-30 

-35 

-40 

-45 

-50 

IGRF 1980 DECLINATION (D) 

90 95 100 105 110 115 120 125 130 135 140 

-2.6 -1.5 -0.4 0.4 1.0 1.3 1.5 1.8 2.2 2.8 3.6 

-3.6 -3.5 -3.3 -3.2 -3.1 -3.0 -3.0 -2.7 -2.2 -1.3 -0.2 

-3.7 -2.2 -0.9 0.2 1.0 1.5 1.8 2.2 2.7 3.4 4.3 

-4.1 -4.0 -3.7 -3.4 -3.1 -2.8 -2.5 -2.1 -1.5 -0.7 0.3 

-5.2 -3.4 -1.8 -0.4 0.7 1.4 2.0 2.5 3.1 4.0 4.9 

-4.5 -4.4 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -0.8 o.o 0.9 

-7.5 -5.3 -3.2 -1.4 o.o 1.0 1.8 2.6 3.4 4.4 5.5 

-4.8 -4.7 -4.2 -3.5 -2.8 -2.1 -1.4 -0.8 o.o 0.7 1.4 

-10.6 -7.9 -5.3 -3.1 -1.2 0.3 1.5 2.5 3.6 4.8 6.0 

-4.9 -4.8 -4.3 -3.6 -2.7 -1.8 -1.0 -0.1 0.6 1.3 2.0 

-14.8 -11.5 -8.3 -5.4 -3.0 -0.9 0.8 

-4.9 -4.9 -4.5 -3.8 -2.8 -1.7 -0.7 

-20.0 -16.3 -12.4 -8.8 -5.5 -2.7 -0.3 

-5.0 -5.2 -4.9 -4.2 -3.2 -2.0 -0.8 

2. 3 

0.2 

1.8 

0.3 

3.7 

1.1 

3.8 

1.3 

5.2 

1.8 

5.6 

2.1 

6.6 

2.4 

7.4 

2.7 

145 

4.6 

0.9 

5.4 

1.3 

6.0 

1.7 

6.6 

2.1 

7.3 

2.5 

8.1 

2.8 

150 

5.8 

1.8 

6.5 

2.1 

7.1 

2.4 

7.8 

2.6 

8.6 

2.8 

155 160 16 5 170 175 180 

6.9 8.1 9.2 10.0 10.6 10.9 

2.5 2.8 2.9 2.8 2.6 2.3 

7.6 8.7 9.6 10.4 11.0 11.2 

2.7 3.0 3.1 3.0 2.8 2.6 

8.2 9.3 10.2 10.9 11.4 11.7 

2.8 3.1 3.2 3.1 3.0 2.8 

8.9 10.0 10.9 11.6 12.1 12.4 

2.9 3.1 3.2 3.2 3.2 3.0 

9.8 10.9 11.8 12.6 13.1 13.5 

3.1 3.2 3.3 3.4 3.3 3.1 

9.5 10.8 12.0 13.0 13.8 14.5 14.8 

3.1 3.3 3.4 3.5 3.6 3.6 3.4 

9.1 10.7 12.1 13.4 14.5 15.4 16.1 16.5 

3.1 3.4 3.6 3.8 3.9 4.0 3.9 3.7 

-26.5 -22.3 -17.8 -13.3 -9.1 -5.3 -2.0 1.0 

-5.5 -5.8 -5.8 -5.2 -4.1 -2.8 -1.4 -0.1 

3. 6 

1.1 

6.0 

2.1 

8.2 10.3 12.1 13.8 15.3 16.5 17.4 18.1 18.6 

2.8 3.4 3.8 4.1 4.4 4.5 4.6 4.5 4.3 

-34.0 -29.7 -24.8 -19.5 -14.2 -9.2 -4.6 -0.5 

-6.6 -7.1 -7.3 -6.9 -5.9 -4.5 -2.8 -1.1 

3.1 

0.4 

-42.4 -38.6 -33.8 -28.0 -21.7 -15.2 -8.9 -3.2 2.0 

-8.3 -9.0 -9.6 -9.6 -8.9 -7.5 -5.4 -3.1 -0.8 

-51.5 -48.8 -44.9 -39.5 -32.8 -24.9 -16.5 -8.2 -0.6 

-10.2 -11.1 -12.2 -13.1 -13.4 -12.5 -10.2 -6.9 -3.1 

6.3 

1.8 

9.2 11.8 14.0 15.9 17.5 18.8 19.8 20.6 21.1 

2.9 3.8 4.4 4.9 5.3 5.5 5.5 5.4 5.0 

6.4 10.3 13.5 16.3 18.5 20.3 21.8 22.9 23.6 24.1 

1.3 3.0 4.3 5.4 6.1 6.6 6.8 6.8 6.5 6.0 

6.0 11.4 15.9 19.4 22.1 24.2 25.8 26.9 27.6 28.0 

0.3 3.2 5.4 7.0 8.0 8.5 8.7 8.5 8.1 7.4 

-55 -60.9 -59.9 -57.9 -54.3 -48.8 -41.0 -30.9 -19.0 -6.8 4.0 12.7 19.3 24.1 27.6 30.0 31.7 32.7 33.4 33.7 

-11.2 -12.3 -13.9 -15.9 -18.0 -19.6 -19.1 -15.4 -8.8 -1.7 4.1 7.9 10.1 11.3 11.6 11.5 10.9 10.1 9.1 

-60 -70.1 -71.2 -71.6 -71.1 -69.3 -65.4 -58.3 -45.9 -26.7 -4.0 14.6 26.5 33.7 37.9 40.4 41.8 42.4 42.7 42.6 

-10.9 -11.9 -13.4 -15.7 -19.0 -23.8 -29.9 -35.0 -30.6 -11.1 7.4 15.9 18.3 18.2 17.2 15.8 14.3 12.7 11.1 

-65 -78.8 -81.7 -84.5 -87.1 -89.5 -91.7 -93.6 -95.0 -95.0 -89.1 33.2 62.6 64.7 64.3 63.2 61.9 60.5 59.1 57.7 

-9.1 -9.8 -10.7 -12.2 -14.4 -17.7 -23.2 -33.0 -54.4-131.4 183.9 80.2 47.8 34.3 26.7 21.8 18.1 15.2 12.8 

-70 -86.9 -91.1 -95.6-100.2-105.3-110.9-117.4-125.4-135.5-149.3-168.5 167.2 142.7 123.4 109.7 99.9 92.6 86.9 82.2 

-6.4 -6.8 -7.2 -7.7 -8.4 -9.3 -10.3 -11.4 -12.1 -10.8 -4.4 8.5 19.7 22.7 21.1 18.3 15.5 13.1 11.1 

-75 -94.4 -99.5-104.8-110.4-116.5-123.0-130.1-137.9-146.6-156.2-166.8-178.3 169.9 158.0 146.6 136.2 126.8 118.5 111.2 

-3.7 -3.8 -3.9 -4.0 -4.1 -4.2 -4.2 -4.1 -3.7 -3.1 -2.1 -0.7 0.9 2.4 3.7 4.5 4.8 4.9 4.7 

-80 -101.8-107.2-112.8-118.7-124.7-131.0-137.6-144.4-151.5-158.8-166.4-174.2 177.9 170.0 162.2 154.4 146.9 139.7 132.8 

-1.3 -1.4 -1.5 -1.5 -1.5 -1.5 -1.4 -1.4 -1.2 -1.1 -0.9 -0.7 -0.4 -0.1 0.1 0.3 0.5 0.7 0.8 

-85 -109.4-114.8-120.3-125.8-131.5-137.2-143.0-148.8-154.7-160.7-166.7-172.7-178.8 175.2 169.1 163.1 157.1 151.2 145.3 

0.2 0.1 0.1 o.o o.o o.o o.o o.o o.o o.o o.o o.o o.o 0.1 0.1 0.1 0.2 0.2 0.2 

-90 -117.5-122.5-127.5-132.5-137.5-142.5-147.5-152.5-157.5-162.5-167.5-172.5-177.5 177.5 172.5 167.5 162.5 157.5 152.5 

0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 
II.,) 

LONG 

LAT 

0 

-5 

-10 

-15 

-20 

-25 

-30 

-35 

-40 

IGRF 1980 DECLINATION (D) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

10.9 10.8 10.5 10.0 9.6 9.3 9.2 9.1 9.0 8.9 8.8 8.7 8.6 8.7 8.8 8.8 8.6 8.0 6.9 

2.3 1.9 1.2 o.s -0.3 -0.9 -1.1 -0.5 0.6 2.1 3.5 4.3 4.2 3.2 1.3 -0.9 -3.2 -5.1 -6.6 

11.2 11.1 10.8 10.4 10.0 9.8 9.6 9.6 9.5 9.4 9.2 9.1 9.0 9.1 9.3 9.3 9.2 8.7 7.7 

2.6 2.1 1.5 0.7 o.o -0.6 -0.6 -0.1 1.1 2.5 3.8 4.4 4.2 2.9 1.0 -1.3 -3.5 -5.3 -6.6 

11.7 11.6 11.4 11.1 10.8 10.6 10.5 10.4 10.3 10.1 10.0 9.8 9.8 9.8 10.0 10.1 10.0 9.6 8.7 

2.8 2.4 1.8 1.0 0.3 -0.2 -0.2 0.3 1.4 2.7 3.7 4.2 3.7 2.4 0.4 -1.9 -3.9 -5.5 -6.6 

12.4 12.5 12.3 12.1 11.9 11.7 11.6 11.5 11.4 11.3 11.1 10.9 10.8 10.9 11.0 11.1 11.1 10.8 9.9 

3.0 2.6 2.0 1.3 0.6 0.1 0.1 0.6 1.5 2.6 3.4 3.6 3.0 1.6 -0.3 -2.4 -4.3 -5.6 -6.5 

13.5 13.6 13.5 13.4 13.2 13.0 13.0 12.9 12.8 12.6 12.4 12.3 12.2 12.2 12.4 12.5 12.5 12.2 11.4 

3.1 2.8 2.2 1.5 0.9 0.4 0.3 0.7 1.5 2.3 2.8 2.9 2.2 0.8 -1.0 -2.8 -4.4 -5.5 -6.2 

14.8 15.0 15.0 14.9 14.8 14.6 14.5 14.5 14.4 14.2 14.1 14.0 13.9 14.0 14.1 14.3 14.3 14.0 13.2 

3.4 3.0 2.4 1.7 1.1 0.6 0.5 0.7 1.2 1.8 2.1 2.0 1.3 0.1 -1.4 -2.9 -4.1 -5.0 -5.6 

16.5 16.8 16.8 16.7 16.6 16.5 16.4 16.3 16.2 16.1 16.0 16.0 16.0 16.2 16.3 16.5 16.5 16.2 15.4 

3.7 3.3 2.7 2.0 1.3 0.8 0.6 0.6 0.9 1.3 1.5 1.3 0.7 -0.2 -1.4 -2.5 -3.5 -4.2 -4.7 

18.6 18.8 18.9 18.8 18.7 18.6 18.5 18.3 18.3 18.3 18.3 18.4 18.5 18.7 19.0 19.1 19.1 18.7 17.8 

4.3 3.8 3.1 2.3 1.6 1.0 0.7 0.6 0.7 0.9 1.0 0.9 o.s -0.2 -1.0 -1.8 -2.4 -3.0 -3.5 

21.1 21.3 21.4 21.3 21.2 21.0 20.9 20.8 20.8 20.9 21.0 21.2 21.5 21.7 22.0 22.1 21.9 21.4 20.3 

5.0 4.4 3.7 2.8 2.0 1.4 1.0 0.8 0.8 0.9 1.0 1.0 0.7 0.3 -0.2 -0.7 -1.2 -1.6 -2.2 

-45 24.1 24.3 24.3 24.3 24.1 24.0 23.9 23.9 24.0 24.1 24.3 24.6 24.9 25.1 25.3 25.2 24.8 24.1 22.8 

6.0 5.3 4.5 3.6 2.7 2.0 1.5 1.3 1.2 1.3 1.4 1.4 1.3 1.2 0.9 o.s 0.1 -0.4 -1.0 

-so 28.o 28.2 28.2 28.1 28.o 27.9 27.8 27.8 27.9 28.1 28.3 28.5 28.7 28.8 28.7 28.4 27.7 26.6 2s.o 

7.4 6.5 5.5 4.5 3.6 2.9 2.4 2.1 2.0 2.0 2.1 2.1 2.1 2.0 1.8 1.5 1.0 0.4 -0.3 

-55 33.7 33.8 33.7 33.5 33.3 33.2 33.1 33.0 33.1 33.1 33.2 33.2 33.1 32.9 32.4 31.7 30.6 29.1 27.2 

9.1 8.0 6.8 5.7 4.8 4.0 3.5 3.1 2.9 2.9 2.9 2.8 2.8 2.6 2.3 1.9 1.4 0.8 0.1 

-60 42.6 42.3 41.9 41.5 41.1 40.7 40.4 40.1 39.8 39.5 39.2 38.8 38.2 37.4 36.4 35.2 33.6 31.8 29.6 

11.1 9.6 8.3 7.0 6.0 5.1 4.5 4.0 3.7 3.5 3.3 3.2 3.0 2.7 2.3 1.9 1.4 0.8 0.1 

-65 57.7 56.3 55.0 53.8 52.7 51.6 50.6 49.6 48.7 47.7 46.6 45.5 44.2 42.7 41.1 39.3 37.2 34.9 32.4 

12.8 10.9 9.2 7.8 6.6 5.7 5.0 4.4 3.9 3.6 3.2 2.9 2.6 2.3 1.9 1.4 1.0 o.s o.o 

-70 82.2 78.2 74.8 71.8 69.1 66.6 64.3 62.1 60.0 57.9 55.8 53.7 51.5 49.2 46.8 44.3 41.7 39.0 36.1 

11.1 9.4 7.9 6.7 5.7 4.9 4.2 3.7 3.2 2.8 2.5 2.1 1.8 1.5 1.1 0.8 o.s 0.2 -0.1 

-75 111.2 104.8 99.1 93.9 89.2 84.9 81.0 77.2 73.7 70.3 66.9 63.7 60.4 57.2 54.0 50.8 47.5 44.3 40.9 

4.7 4.3 3.9 3.5 3.1 2.7 2.4 2.1 1.8 1.5 1.3 1.1 0.9 0.7 o.s 0.3 0.2 o.o o.o 

-80 132.8 126.2 119.9 113.9 108.3 101.0 97.9 93.0 88.3 83.7 79.3 75.1 70.9 66.8 62.8 58.8 54.9 51.0 47.1 

0.8 0.8 0.9 0.9 0.8 0.8 0.7 0.6 0.6 o.s 0.4 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.3 

-85 145.3 139.5 133.9 128.2 122.7 117.3 112.0 106.8 101.7 96.6 91.7 86.8 82.0 77.3 72.6 68.0 63.4 58.9 54.4 

0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.4 0.4 0.4 0.4 o.s 0.5 0.6 0.6 0.7 

-90 152.5 147.5 142.5 137.5 132.5 127.5 122.5 117.5 112.5 107.5 102.5 97.5 92.5 87.5 82.5 77.5 72.5 67.5 62.5 

0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 
(,.) 

LONG 

LAT 

-90 -85 -80 -75 -70 

IGRF 1980 

-65 -60 -55 -50 

DECLINATION (D) 

-45 -40 -35 -30 -25 -20 -15 -10 -5 0 

0 6.9 5.2 2.8 -0.1 -3.5 -7.2 -10.8 -14.2 -17.0 -19.1 -20.4 -21.0 -20.7 -19.8 -18.2 -16.1 -13.9 -11.7 -9.8 

-6.6 -7.8 -8.8 -9.9 -11.0 -11.8 -12.1 -11.3 -9.5 -6.8 -3.7 -0.7 1.8 3.6 4.6 5.1 5.4 5.8 6.6 

-5 7.7 6.1 3.8 0.9 -2.6 -6.3 -10.1 -13.7 -16.8 -19.2 -20.9 -21.9 -22.0 -21.4 -20.1 -18.3 -16.3 -14.2 -12.2 

-6.6 -7.6 -8.5 -9.6 -10.8 -11.9 -12.5 -12.1 -10.6 -8.1 -5.1 -2.0 0.6 2.4 3.5 4.1 4.5 5.2 6.2 

-10 8.7 7.2 4.9 2.0 -1.5 -5.4 -9.3 -13.1 -16.5 -19.2 -21.3 -22.6 -23.1 -23.0 -22.1 -20.7 -19.0 -17.1 -15.2 

-6.6 -7.4 -8.2 -9.2 -10.5 -11.8 -12.5 -12.4 -11.2 -8.9 -6.1 -3.1 -0.5 1.4 2.5 3.1 3.6 4.3 5.7 

-15 9.9 8.4 6.2 3.3 -0.2 -4.2 -8.4 -12.4 -16.0 -19.0 -21.4 -23.1 -24.0 -24.3 -23.9 -23.0 -21.8 -20.2 -18.4 

-6.5 -7.1 -7.8 -8.8 -10.1 -11.4 -12.3 -12.4 -11.4 -9.3 -6.7 -3.8 -1.3 0.5 1.6 2.2 2.6 3.5 5.0 

-20 11.4 10.0 7.8 4.9 1.3 -2.9 -7.2 -11.4 -15.3 -18.6 -21.2 -23.2 -24.5 -25.2 -25.3 -25.0 -24.2 -23.1 -21.6 

-6.2 -6.7 -7.4 -8.3 -9.6 -10.9 -11.9 -12.1 -11.2 -9.4 -6.9 -4.2 -1.7 0.1 1.2 1.7 2.1 2.9 4.4 

-25 13.2 11.8 9.6 6.7 3.0 -1.2 -5.7 -10.1 -14.3 -17.8 -20.7 -22.9 -24.5 -25.6 -26.1 -26.3 -26.0 -25.4 -24.3 

-5.6 -6.1 -6.7 -7.7 -9.0 -10.3 -11.3 -11.5 -10.8 -9.1 -6.8 -4.2 -1.7 0.1 1.3 1.9 2.2 2.9 4.3 

-30 15.4 14.0 11.8 8.8 5.0 0.7 -3.9 -8.5 -12.8 -16.5 -19.7 -22.1 -24.0 -25.3 -26.2 -26.7 -26.9 -26.6 -26.0 

-4.7 -5.2 -5.9 -6.9 -8.2 -9.5 -10.5 -10.8 -10.2 -8.7 -6.5 -3.9 -1.5 0.5 1.8 2.6 3.1 3.8 4.9 

-35 17.8 16.3 14.0 11.0 7.2 2.9 -1.7 -6.3 -10.7 -14.6 -18.0 -20.6 -22.7 -24.3 -25.4 -26.2 -26.7 -26.7 -26.5 

-40 

-3.5 -4.1 -4.9 -6.0 -7.3 -8.6 -9.5 -9.8 -9.3 -8.0 -5.9 -3.5 -1.1 1.0 2.6 3.8 4.5 5.3 6.1 

20.3 18.7 16.3 13.2 9.5 5.3 0.8 -3.8 -8.1 -12.1 -15.5 -18.3 -20.6 -22.4 -23.7 -24.7 -25.3 -25.7 -25.8 

-2.2 -2.9 -3.8 -4.9 -6.2 -7.4 -8.3 -8.6 -8.2 -7.0 -5.2 -2.9 -0.5 1.7 3.6 5.0 6.1 6.9 7.4 

-45 22.8 20.9 18.4 15.3 11.7 7.7 3.4 -1.0 -5.1 -9.0 -12.4 -15.3 -17.7 -19.6 -21.1 -22.3 -23.2 -23.9 -24.4 

-1.0 -1.8 -2.8 -3.9 -5.1 -6.2 -6.9 -7.2 -6.8 -5.7 -4.1 -2.0 0.3 2.5 4.5 6.2 7.4 8.1 8.2 

-50 25.0 23.0 20.4 17.3 13.8 10.0 6.0 2.0 -1.9 -5.5 -8.8 -11.7 -14.1 -16.2 -17.9 -19.4 -20.6 -21.7 -22.7 

-0.3 -1.1 -2.0 -3.1 -4.1 -4.9 -5.4 -5.5 -5.1 -4.2 -2.7 -0.9 1.2 3.3 5.2 6.8 7.9 8.4 8.2 

-55 27.2 25.0 22.3 19.2 15.9 12.4 8.7 5.0 1.4 -2.0 -5.1 -7.9 -10.5 -12.7 -14.7 -16.4 -18.1 -19.7 -21.3 

0.1 -0.7 -1.5 -2.4 -3.1 -3.7 -4.0 -3.9 -3.4 -2.5 -1.2 0.4 2.2 4.0 5.6 6.9 7.8 8.0 7.6 

-60 29.6 27.1 24.3 21.3 18.1 14.8 11.4 8.0 4.7 1.5 -1.6 -4.4 -7.0 -9.4 -11.7 -13.8 -15.9 -18.0 -20.1 

-65 

-70 

-75 

-80 

-85 

-90 

0.1 -0.5 -1.2 -1.8 -2.2 -2.5 -2.6 -2.4 -1.8 -1.0 0.1 1.4 2.8 4.2 5.5 6.4 7.0 7.1 6.6 

32.4 29.7 26.8 23.8 20.7 17.5 14.2 11.0 7.8 

o.o -0.5 -0.9 -1.2 -1.4 -1.5 -1.3 -1.0 -0.5 

4.7 

0.2 

1.7 -1.2 -4.0 -6.6 -9.2 -11.8 -14.3 -16.8 -19.4 

1.1 2.1 3.2 4.2 5.0 5.6 5.9 5.9 5.5 

36.1 33.1 30.0 26.9 23.7 20.5 17.2 14.0 10.8 

-0.1 -0.4 -0.5 -0.6 -0.6 -0.5 -0.3 o.o 0.5 

7.6 

1.1 

4.5 1.5 -1.5 -4.4 -7.4 -10.3 -13.2 -16.2 -19.2 

1.7 2.4 3.1 3.7 4.3 4.6 4.8 4.7 4.4 

40.9 37.6 34.2 30.8 27.4 24.0 20.6 17.2 13.8 10.4 

o.o -0.1 -0.1 o.o 0.1 0.3 0.5 0.8 1.1 1.5 

47.1 43.3 39.4 35.6 31.8 28.0 24.3 20.5 16.8 13.0 

0.3 0.3 0.4 0.5 0.6 0.8 1.0 1.2 1.4 1.6 

7.1 

2.0 

9.3 

1.8 

54.4 50.0 45.6 41.2 36.9 32.6 28.3 24.0 19.7 15.4 11.1 

0.7 0.7 0.8 0.9 0.9 1.0 1.1 1.2 1.2 1.3 1.4 

62.5 57.5 52.5 47.5 42.5 37.5 32.5 27.5 22.5 17.5 12.5 

0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 

3.8 

2.4 

5.6 

2.0 

6.9 

1.4 

7.5 

0.8 

0.4 -2.9 -6.2 -9.5 -12.9 -16.2 -19.7 

2.8 3.1 3.4 3.6 3.6 3.6 3.4 

1.8 -1.9 -5.7 -9.4 -13.2 -17.1 -20.9 

2.2 2.4 2.5 2.6 2.6 2.6 2.5 

2.6 -1.7 -6.0 -10.3 -14.6 -19.0 -23.3 

1.5 1.6 1.6 1.6 1.6 1.6 1.6 

2.5 -2.5 -7.5 -12.5 -17.5 -22.5 -27.5 

0.8 0.8 0.8 0.8 0.8 0.8 0.8 
.. 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

45 

IGRF 1980 INCLINATION (I) 

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 

1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 

85.0 85.0 85.0 85.0 85.1 85.1 85.2 85.3 85.4 85.6 85.7 85.9 86.0 86.2 86.4 86.6 86.8 87.0 87.2 

0.9 0.9 0.9 1.0 1.0 1.0 1.1 1.1 1.1 1.2 1.2 1.2 1.2 1.3 1.3 1.3 1.3 1.3 1.3 

82.5 82.5 82.5 82.5 82.6 82.7 82.8 83.0 83.2 83.4 83.6 83.9 84.2 84.6 84.9 85.3 85.7 86.0 86.4 

0.6 0.7 0.8 0.8 0.9 1.0 1.0 1.1 1.2 1.2 1.3 1.3 1.3 1.4 1.4 1.4 1.4 1.4 1.4 

80.2 80.1 80.1 80.1 80.2 80.3 80.4 80.6 80.9 81.1 81.5 81.8 82.2 82.7 83.1 83.6 84.1 84.6 85.0 

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.2 1.3 1.3 1.4 1.4 1.4 1.4 1.3 1.3 

77.8 77.7 77.7 77.7 77.8 77.9 78.1 78.3 78.5 78.8 79.2 79.6 80.0 80.5 81.0 81.5 82.1 82.6 83.0 

o.o 0.1 0.3 0.4 0.6 0.7 0.8 0.9 1.0 1.1 1.1 1.2 1.2 1.2 1.2 1.2 1.2 1.1 1.0 

75.2 75.2 75.2 75.2 75.3 75.4 75.6 75.8 76.1 76.3 76.7 77.1 77.5 78.0 78.5 79.0 79.5 80.0 80.4 

-0.3 -0.1 0.0 0.2 0.4 0.5 0.7 0.8 0.9 0.9 1.0 1.0 1.0 1.0 1.0 0.9 0.9 0.8 0.8 

72.4 72.3 72.4 72.4 72.6 72.7 72.9 73.1 73.4 73.6 73.9 74.3 74.7 75.1 75.5 76.0 76.4 76.9 77.2 

-0.6 -0.3 -0.1 0.1 0.3 0.5 0.6 0.7 0.8 0.9 0.9 0.9 0.8 0.8 0.7 0.7 0.7 0.6 0.6 

69.1 69.1 69.1 69.3 69.4 69.6 69.8 70.1 70.3 70.6 70.8 71.1 71.5 71.8 72.2 72.6 72.9 73.2 73.5 

-0.8 -o.5 -0.2 0.1 o.3 o.5 o.7 o.8 o.9 o.9 o.9 o.8 o.8 o.7 o.6 o.6 o.6 o.5 o.6 

65.2 65.2 65.4 65.5 65.7 66.0 66.2 66.5 66.8 67.0 67.3 67.5 67.8 68.0 68.3 68.6 68.8 69.1 69.2 

-1.1 -0.7 -0.3 0.1 0.4 0.7 0.9 1.0 1.1 1.1 1.1 1.0 0.9 0.8 0.7 0.7 0.6 0.6 0.6 

60.7 60.7 60.9 61.1 61.3 61.6 61.9 62.2 62.5 62.8 63.1 63.3 63.5 63.7 63.8 64.0 64.1 64.2 64.3 

-1.4 -0.9 -0.4 0.1 0.5 0.9 1.1 1.3 1.4 1.4 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.8 0.8 

40 55.3 55.3 55.5 55.7 56.0 56.4 56.7 57.1 57.5 57.8 58.1 58.3 58.5 58.6 58.6 58.6 58.6 58.6 58.6 

-2.1 -1.4 -0.8 -0.1 0.4 0.9 1.3 1.5 1.7 1.7 1.8 1.7 1.7 1.6 1.5 1.4 1.3 1.2 1.1 

35 48.8 48.9 49.1 49.3 49.7 50.1 50.5 50.9 51.4 51.8 52.2 52.4 52.5 52.6 52.5 52.4 52.2 52.1 52.0 

-3.0 -2.2 -1.4 -o.5 0.2 o.9 1.4 1.7 1.9 2.1 2.2 2.3 2.3 2.3 2.2 2.0 1.8 1.7 1.6 

30 41.2 41.2 41.4 41.7 42.1 42.6 43.0 43.6 44.2 44.7 45.1 45.4 45.5 45.4 45.3 45.0 44.7 44.5 44.3 

-4.4 -3.4 -2.3 -1.2 -0.3 0.6 1.3 1.7 2.1 2.4 2.6 2.8 3.0 3.1 3.0 2.8 2.6 2.3 2.1 

25 32.2 32.2 32.4 32.7 33.1 33.6 34.2 34.8 35.6 36.2 36.8 37.1 37.2 37.1 36.8 36.4 36.0 35.6 35.4 

-6.1 -4.9 -3.6 -2.3 -1.0 0.1 1.0 1.7 2.2 2.6 3.0 3.4 3.8 3.9 3.9 3.7 3.4 3.0 2.7 

20 21.8 21.8 22.0 22.3 22.7 23.2 23.9 24.7 25.5 26.4 27.1 27.5 27.6 27.4 27.0 26.5 25.9 25.5 25.2 

-8.0 -6.7 -5.2 -3.5 -2.0 -0.6 0.6 1.5 2.2 2.8 3.4 4.0 4.6 4.9 5.0 4.7 4.3 3.7 3.2 

15 10.2 10.1 10.3 10.6 10.9 11.5 12.2 13.2 14.2 15.3 16.1 16.6 16.7 16.5 16.0 15.3 14.6 14.1 13.8 

10 

-10.1 -8.6 -6.9 -5.0 -3.1 -1.4 0.1 1.2 2.1 3.0 3.8 4.6 5.3 5.8 5.9 5.6 5.1 4.4 3.7 

-2.1 -2.3 -2.2 -2.0 -1.7 -1.2 -0.4 

-11.9 -10.3 -8.5 -6.4 -4.2 -2.2 -0.5 

0.7 

0.9 

1.9 

2.0 

3.2 

3.1 

4.1 

4.1 

4.7 

5.1 

4.9 

5.9 

4.6 

6.5 

4.0 

6.6 

3.3 

6.3 

2.5 

5.6 

2.0 

4.8 

1.7 

3.9 

5 -14.3 -14.7 -14.8 -14.8 -14.6 -14.1 -13.3 -12.1 -10.7 -9.4 -8.3 -7.6 -7.4 -7.7 -8.3 -9.0 -9.7 -10.2 -10.4 

-13.2 -11.6 -9.7 -7.5 -5.2 -3.0 -1.0 0.6 1.9 3.1 4.2 5.3 6.2 6.8 6.9 6.6 5.8 4.8 3.8 

0 -25.8 -26.4 -26.8 -26.9 -26.8 -26.4 -25.6 -24.3 -22.9 -21.5 -20.3 -19.6 -19.4 -19.6 -20.2 -20.8 -21.5 -21.9 -22.0 

-13.9 -12.4 -10.6 -8.3 -5.9 -3.6 -1.5 0.3 1.8 3.1 4.3 5.3 6.2 6.7 6.8 6.4 5.6 4.5 3.4 
<.n 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 INCLINATION (I) 

90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 

87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 

1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 

87.2 87.4 87.6 87.8 87.9 88.1 88.2 88.3 88.3 88.3 88.4 88.3 88.3 88.3 88.3 88.3 88.3 88.3 88.3 

1.3 1.4 1.3 1.3 1.3 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.6 0.5 0.4 0.4 0.4 0.4 

86.4 86.7 87.0 87.2 87.3 87.3 87.2 87.0 86.8 86.6 86.3 86.1 85.8 85.6 85.5 85.3 85.2 85.2 85.2 

1.4 1.4 1.3 1.1 0.9 0.7 0.5 0.3 0.1 o.o -0.1 -0.1 -0.1 -0.2 -0.2 -0.2 -0.1 -0.1 -0.1 

85.0 85.3 85.6 85.7 85.6 85.4 85.1 84.7 84.3 83.8 83.4 82.9 82.6 82.2 81.9 81.7 81.6 81.5 81.6 

1.3 1.2 1.0 0.8 0.6 0.4 0.2 o.o -0.1 -0.1 -0.2 -0.2 -0.2 -0.2 -0.2 -0.1 -0.1 -0.1 o.o 

83.0 83.3 83.5 83.5 83.3 82.9 82.5 81.9 81.3 80.6 80.0 79.4 78.9 78.5 78.1 77.9 77.7 77.6 77.6 

1.0 0.9 0.8 0.6 0.5 0.3 0.2 0.1 o.o 0.0 o.o -0.1 -0.1 o.o o.o o.o o.o 0.1 0.1 

80.4 80.6 80.7 80.6 80.4 79.9 79.3 78.6 77.9 77.1 76.4 75.7 75.0 74.5 74.1 73.8 73.6 73.5 73.6 

0.8 0.7 0.7 0.6 0.5 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 

77.2 77.4 77.4 77.3 77.0 76.5 75.8 75.0 74.2 73.3 72.4 71.6 70.9 70.3 69.9 69.5 69.4 69.4 69.5 

0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.4 0.4 0.4 0.3 0.3 0.3 0.2 0.2 

73.5 73.6 73.6 73.4 73.1 72.6 71.9 71.0 70.1 69.2 68.3 67.4 66.6 66.0 65.5 65.2 65.1 65.1 65.3 

0.6 0.6 0.6 0.7 0.7 0.8 0.8 0.8 0.7 0.7 0.7 0.7 0.6 0.6 0.5 0.4 0.3 0.2 0.2 

69.2 69.3 69.3 69.1 68.7 68.2 67.5 66.6 65.7 64.8 63.8 62.9 62.1 61.5 61.0 60.8 60.7 60.9 61.2 

0.6 0.7 0.8 0.8 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.8 0.8 0.7 0.6 0.5 0.3 0.2 0.1 

45 64.3 64.3 64.3 64.1 63.8 63.3 62.6 61.8 60.9 59.9 58.9 58.0 57.3 56.7 56.3 56.2 56.3 56.5 57.0 

0.8 0.9 0.9 1.0 1.1 1.1 1.1 1.0 0.9 0.9 0.9 0.8 0.8 0.8 0.7 0.5 0.3 0.1 -0.1 

40 58.6 58.6 58.5 58.4 58.1 57.7 57.1 56.3 55.4 54.5 53.6 52.7 52.0 51.5 51.3 51.3 51.6 52.1 52.7 

1.1 1.2 1.2 1.3 1.3 1.2 1.1 0.9 0.8 0.6 0.6 0.6 0.6 0.6 0.6 0.4 0.2 o.o -0.2 

35 52.0 52.0 51.9 51.8 51.6 51.3 50.8 50.1 49.3 48.4 47.5 46.7 46.1 45.8 45.7 46.0 46.5 47.3 48.3 

1.6 1.5 1.5 1.5 1.5 1.3 1.0 0.7 0.4 0.1 o.o o.o 0.1 0.2 0.3 0.3 0.1 -0.1 -0.3 

30 44.3 44.2 44.2 44.2 44.1 43.9 43.5 42.9 42.2 41.4 40.6 39.9 39.5 39.3 39.6 40.1 41.0 42.1 43.3 

2.1 2.0 1.9 1.8 1.6 1.3 0.9 0.3 -0.3 -0.7 -0.9 -0.9 -0.7 -0.4 -0.2 -0.1 -0.1 -0.2 -0.4 

25 35.4 35.3 35.3 35.4 35.5 35.4 35.1 34.7 34.1 33.4 32.8 32.3 32.0 32.1 32.6 33.5 34.7 36.2 37.8 

2.7 2.4 2.2 2.1 1.8 1.3 0.6 -0.2 -1.0 -1.7 -2.1 -2.1 -1.8 -1.3 -0.9 -0.5 -0.4 -0.3 -0.3 

20 25.2 25.1 25.2 25.5 25.7 25.7 25.6 25.3 24.9 24.4 23.9 23.7 23.6 24.0 24.8 26.0 27.6 29.4 31.3 

3.2 2.8 2.5 2.2 1.8 1.2 0.3 -0.8 -2.0 -2.9 -3.4 -3.4 -3.1 -2.4 -1.7 -1.1 -0.7 -0.4 -0.2 

15 13.8 13.8 14.0 14.4 14.8 15.1 15.1 15.0 14.8 14.4 14.2 14.1 14.4 15.0 16.1 17.6 19.5 21.6 23.8 

3.7 3.1 2.7 2.2 1.7 0.9 -0.2 -1.5 -2.9 -4.0 -4.6 -4.7 -4.3 -3.5 -2.5 -1.7 -1.0 -0.5 -0.1 

10 1.7 1.8 2.2 2.7 3.3 3.7 4.0 4.1 4.0 3.8 3.8 4.0 4.5 5.4 6.7 8.4 10.5 12.8 15.1 

3.9 3.1 2.5 2.0 1.3 0.4 -0.8 -2.2 -3.7 -4.9 -5.6 -5.7 -5.2 -4.2 -3.2 -2.1 -1.2 -0.5 0.1 

5 -10.4 -10.3 -9.8 -9.1 -8.4 -7.8 -7.3 -7.1 -7.0 -6.9 -6.7 -6.3 -5.6 -4.6 -3.2 -1.4 0.7 3.1 

3.8 2.9 2.1 1.5 0.7 -0.2 -1.4 -2.8 -4.2 -5.3 -6.0 -6.1 -5.5 -4.6 -3.5 -2.4 -1.4 -0.5 

5.5 

0.3 

0 -22.0 -21.8 -21.2 -20.5 -19.6 -18.8 -18.3 -17.9 -17.6 -17.4 -17.0 -16.5 -15.6 -14.5 -13.1 -11.3 -9.3 -7.0 -4.7 

3.4 2.4 1.5 0.8 o.o -0.9 -2.0 -3.2 -4.4 -5.3 -5.9 -5.9 -5.4 -4.5 -3.5 -2.4 -1.4 -0.5 0.4 
0. 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 INCLINATION (I) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 

1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 

88.3 88.3 88.4 88.4 88.5 88.6 88.7 88.8 88.9 88.9 89.0 89.0 89.0 88.9 88.7 88.6 88.4 88.2 87.9 

0.4 0.4 0.4 0.5 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.2 1.2 1.1 1.0 0.9 0.9 0.8 

85.2 85.3 85.4 85.5 85.7 85.9 86.2 86.5 86.9 87.3 87.7 88.1 88.6 89.0 89.4 89.5 89.2 88.7 88.3 

-0.1 -0.1 o.o o.o o.o 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.5 0.8 1.2 1.3 0.7 0.4 0.3 

81.6 81.6 81.8 82.1 82.4 82.8 83.2 83.7 84.3 84.9 85.5 86.2 86.9 87.6 88.4 89.1 89.6 89.2 88.4 

o.o o.o 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.3 0.2 0.1 -0.2 -1.7 -1.3 -1.0 

77.6 77.8 78.0 78.4 78.8 79.3 79.9 80.6 81.4 82.2 83.0 83.9 84.8 85.7 86.6 87.4 88.0 88.2 87.8 

0.1 0.2 0.2 0.2 0.3 0.3 0.4 0.4 0.4 0.4 0.3 0.3 0.2 o.o -0.3 -0.8 -1.6 -2.3 -2.4 

73.6 73.8 74.1 74.6 75.1 75.8 76.5 77.3 78.2 79.2 80.2 81.2 82.3 83.3 84.3 85.1 85.8 86.1 86.1 

0.2 0.2 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4 0.3 0.1 -0.1 -0.3 -0.7 -1.2 -1.8 -2.5 -2.9 

69.5 69.7 70.1 70.7 71.3 72.1 72.9 73.9 74.9 75.9 77.0 78.2 79.3 80.4 81.4 82.3 83.1 83.5 83.6 

0.2 0.2 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.3 0.1 -0.1 -0.3 -0.6 -1.0 -1.5 -2.1 -2.7 -3.3 

65.3 65.7 66.1 66.8 67.5 68.3 69.3 70.3 71.3 72.5 73.6 74.8 75.9 77.0 78.1 79.1 79.8 80.4 80.6 

0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3 0.2 0.1 -0.1 -0.3 -0.6 -0.9 -1.3 -1.7 -2.3 -2.9 -3.5 

61.2 61.6 62.2 62.9 63.7 64.6 65.6 66.6 67.7 68.8 69.9 71.1 72.3 73.4 74.4 75.4 76.3 76.9 77.3 

0.1 o.o 0.0 o.o 0.1 0.2 0.2 0.2 0.1 -0.1 -0.3 -0.5 -0.8 -1.1 -1.4 -1.8 -2.3 -2.9 -3.5 

45 57.0 57.6 58.3 59.1 59.9 60.8 61.8 62.8 63.9 65.0 66.1 67.2 68.3 69.4 70.5 71.5 72.4 73.1 73.6 

-0.1 -0.2 -0.2 -0.2 -0.1 o.o 0.1 o.o -0.1 -0.3 -0.5 -0.7 -0.9 -1.1 -1.3 -1.6 -2.0 -2.6 -3.3 

40 52.7 53.5 54.3 55.2 56.1 57.0 58.0 59.0 60.0 61.0 62.1 63.1 64.2 65.3 66.3 67.3 68.3 69.1 69.6 

-0.2 -0.4 -0.4 -0.3 -0.2 -0.1 -0.1 -0.1 -0.3 -0.5 -0.6 -0.8 -0.9 -0.9 -1.0 -1.2 -1.5 -2.1 -2.8 

35 48.3 49.3 50.3 51.2 52.2 53.1 54.0 54.9 55.8 56.8 57.8 58.8 59.8 60.8 61.8 62.8 63.8 64.7 65.3 

-0.3 -0.5 -0.5 -0.4 -0.3 -0.2 -0.2 -0.3 -0.5 -0.7 -0.8 -0.8 -0.7 -0.6 -0.5 -0.5 -0.8 -1.3 -2.1 

30 43.3 44.6 45.8 46.9 47.9 48.8 49.6 50.4 51.3 52.2 53.1 54.0 54.9 55.9 56.9 57.9 58.9 59.9 60.7 

-0.4 -0.4 -0.4 -0.3 -0.2 -0.2 -0.3 -0.6 -0.8 -1.0 -1.0 -0.8 -0.5 o.o 0.3 0.5 0.3 -0.2 -1.0 

25 37.8 39.4 40.8 42.0 42.9 43.8 44.6 45.3 46.1 46.9 47.8 48.6 49.5 50.4 51.4 52.4 53.5 54.6 55.5 

-0.3 -0.3 -0.2 -0.1 o.o -0.1 -0.4 -0.8 -1.2 -1.3 -1.2 -0.7 0.0 0.8 1.4 1.8 1.7 1.2 0.2 

20 31.3 33.2 34.8 36.1 37.1 37.9 38.7 39.4 40.1 40.8 41.6 42.4 43.2 44.1 45.1 46.2 47.4 48.6 49.8 

-0.2 o.o 0.2 0.3 0.3 o.o -0.5 -1.1 -1.6 -1.7 -1.3 -0.5 0.6 1.8 2.7 3.3 3.3 2.7 1.7 

15 23.8 25.9 27.6 29.0 30.1 30.9 31.6 32.3 33.0 33.8 34.5 35.3 36.1 37.0 38.0 39.2 40.5 41.9 43.3 

-0.1 0.3 0.6 0.8 0.6 0.2 -0.5 -1.3 -1.9 -1.9 -1.3 -0.2 1.4 3.0 4.3 5.0 5.0 4.4 3.2 

10 15.1 17.3 19.2 20.7 21.8 22.7 23.4 24.1 24.8 25.6 26.4 27.1 27.9 28.8 29.9 31.3 32.8 34.4 36.1 

0.1 0.6 1.1 1.2 1.0 0.4 -0.5 -1.5 -2.1 -2.0 -1.1 0.5 2.5 4.5 6.0 6.8 6.7 6.0 4.7 

5 5.5 7.8 9.7 11.3 12.4 13.3 14.1 14.9 15.7 16.5 17.3 18.0 18.9 19.8 21.0 22.4 24.2 26.0 28.0 

0.3 0.9 1.4 1.6 1.4 0.6 -0.4 -1.4 -2.0 -1.8 -0.6 1.3 3.7 6.0 7.7 8.5 8.3 7.4 5.9 

0 -4.7 -2.5 -0.6 1.0 2.2 3.2 4.0 4.9 5.8 6.6 7.5 8.3 9.1 10.1 11.4 12.9 14.8 16.9 19.1 

0.4 1.1 1.7 1.9 1.6 0.9 -0.2 -1.2 -1.7 -1.3 0.1 2.4 5.0 7.5 9.2 9.9 9.5 8.4 6.8 
....... 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 INCLINATION (I) 

-90 -85 -80 -75 -70 -65 -6o -ss -so -45 -4o -35 -30 -2s -20 -1s -1o -s o 

87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 87.6 

1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 

87.9 87.7 87.5 87.3 87.0 86.8 86.6 86.4 86.2 86.0 85.8 85.7 85.5 85.4 85.3 85.2 85.1 85.1 85.0 

0.8 0.8 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.8 0.8 0.8 0.8 0.9 

88.3 87.8 87.3 86.8 86.3 85.9 85.5 85.1 84.7 84.3 84.0 83.7 83.4 83.2 83.0 82.9 82.7 82.6 82.5 

0.3 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.3 0.3 0.4 0.4 o.s 0.6 0.6 

88.4 87.7 87.0 86.3 85.6 84.9 84.3 83.7 83.2 82.6 82.2 81.8 81.4 81.1 80.8 80.6 80.4 80.3 80.2 

-1.0 -0.8 -0.8 -0.7 -0.7 -0.6 -0.6 -0.5 -0.5 -0.4 -0.4 -0.3 -0.2 -0.1 -0.1 o.o 0.1 0.2 0.3 

87.8 87.1 86.3 85.4 84.6 83.7 82.9 82.2 81.5 80.8 80.2 79.7 79.3 78.9 78.6 78.3 78.1 77.9 77.8 

-2.4 -2.2 -1.9 -1.8 -1.6 -1.5 -1.4 -1.3 -1.2 -1.1 -1.0 -0.9 -0.8 -0.7 -0.5 -0.4 -0.3 -0.1 o.o 

86.1 85.6 84.9 84.0 83.1 82.1 81.2 80.3 79.5 78.7 78.0 77.4 76.9 76.4 76.0 75.7 75.5 75.3 75.2 

-2.9 -3.1 -3.0 -2.9 -2.7 -2.5 -2.4 -2.2 -2.1 -1.9 -1.7 -1.6 -1.4 -1.2 -1.0 -0.9 -0.7 -0.5 -0.3 

83.6 83.4 82.8 82.0 81.1 80.0 79.0 78.0 77.1 76.2 75.4 74.7 74.1 73.6 73.2 72.9 72.6 72.4 72.4 

-3.3 -3.6 -3.8 -3.8 -3.7 -3.6 -3.4 -3.2 -3.0 -2.7 -2.5 -2.2 -2.0 -1.8 -1.5 -1.3 -1.1 -0.8 -0.6 

80.6 80.6 80.1 79.4 78.5 77.5 76.4 75.3 74.2 73.2 72.3 71.5 70.9 70.3 69.9 69.5 69.3 69.1 69.1 

-3.5 -4.0 -4.3 -4.6 -4.6 -4.5 -4.4 -4.2 -3.9 -3.6 -3.3 -3.0 -2.6 -2.3 -2.0 -1.7 -1.4 -1.1 -0.8 

77.3 77.3 77.1 76.4 75.6 74.5 73.4 72.2 71.0 69.9 68.8 67.9 67.2 66.6 66.1 65.7 65.4 65.3 65.2 

-3.5 -4.1 -4.7 -5.1 -5.4 -5.4 -5.4 -5.2 -4.9 -4.6 -4.2 -3.8 -3.4 -3.0 -2.6 -2.2 -1.8 -1.4 -1.1 

45 73.6 73.8 73.6 73.1 72.3 71.2 70.0 68.7 67.4 66.1 64.9 63.9 63.0 62.3 61.7 61.2 60.9 60.7 60.7 

-3.3 -4.1 -4.8 -5.5 -5.9 -6.2 -6.3 -6.2 -6.0 -5.7 -5.3 -4.8 -4.3 -3.8 -3.3 -2.9 -2.4 -1.9 -1.4 

40 69.6 69.9 69.9 69.5 68.7 67.7 66.4 64.9 63.5 62.0 60.6 59.4 58.3 57.3 56.6 56.0 55.6 55.3 55.3 

-2.8 -3.7 -4.7 -5.6 -6.3 -6.9 -7.2 -7.3 -7.2 -7.0 -6.6 -6.1 -5.5 -5.0 -4.4 -3.8 -3.3 -2.7 -2.1 

35 65.3 65.8 65.9 65.6 64.9 63.8 62.5 60.9 59.2 57.5 55.8 54.3 52.8 51.6 50.6 49.8 49.2 48.9 48.8 

-2.1 -3.1 -4.2 -5.4 -6.4 -7.3 -8.0 -8.4 -8.6 -8.5 -8.3 -7.8 -7.2 -6.5 -5.8 -5.1 -4.5 -3.8 -3.0 

30 60.7 61.2 61.5 61.3 60.7 59.7 58.3 56.5 54.6 52.5 50.4 48.4 46.6 44.9 43.6 42.5 41.8 41.3 41.2 

-1.0 -2.2 -3.5 -4.8 -6.2 -7.5 -8.6 -9.5 -10.1 -10.3 -10.3 -9.9 -9.3 -8.5 -7.7 -6.9 -6.1 -5.3 -4.4 

25 55.5 56.2 56.7 56.7 56.2 55.2 53.7 51.8 49.5 47.0 44.4 41.9 39.4 37.2 35.4 33.9 32.9 32.4 32.2 

0.2 -1.0 -2.4 -4.0 -5.7 -7.4 -9.0 -10.4 -11.6 -12.4 -12.7 -12.5 -11.9 -11.0 -10.1 -9.1 -8.1 -7.1 -6.1 

20 49.8 50.7 51.3 51.5 51.2 50.2 48.6 46.5 43.9 40.9 37.7 34.5 31.3 28.5 26.0 24.1 22.8 22.0 21.8 

1.7 0.4 -1.2 -3.0 -4.9 -7.0 -9.2 -11.3 -13.2 -14.6 -15.4 -15.4 -14.9 -13.9 -12.7 -11.5 -10.4 -9.2 -8.0 

15 43.3 44.5 45.4 45.8 45.6 44.7 43.0 40.7 37.7 34.2 30.3 26.3 22.3 18.7 15.6 13.2 11.5 10.6 10.2 

3.2 1.8 0.1 -1.8 -4.0 -6.5 -9.3 -12.1 -14.8 -16.9 -18.2 -18.5 -18.0 -16.9 -15.4 -14.0 -12.7 -11.4 -10.1 

10 36.1 37.6 38.7 39.3 39.3 38.5 36.7 34.2 30.8 26.7 22.2 17.4 12.7 8.3 4.6 1.7 -0.3 -1.5 -2.1 

4.7 3.1 1.4 -0.6 -3.0 -5.9 -9.2 -12.8 -16.2 -19.1 -20.9 -21.5 -20.9 -19.6 -17.8 -16.1 -14.6 -13.3 -11.9 

5 28.0 29.8 31.2 32.1 32.3 31.5 29.7 26.9 23.2 18.6 13.5 8.1 2.8 -2.2 -6.4 -9.8 -12.1 -13.5 -14.3 

5.9 4.3 2.4 0.4 -2.1 -5.3 -9.1 -13.3 -17.4 -20.8 -23.1 -23.8 -23.1 -21.5 -19.5 -17.6 -15.9 -14.5 -13.2 

0 19.1 21.2 23.0 24.1 24.4 23.7 21.9 19.0 15.0 10.1 4.6 -1.2 -6.9 -12.2 -16.8 -20.4 -23.0 -24.7 -25.8 

6.8 s.o 3.1 1.1 -1.5 -4.8 -8.9 -13.5 -18.1 -21.9 -24.3 -25.1 -24.3 -22.4 -20.2 -18.2 -16.5 -15.1 -13.9 
CX) 

IGRF 1980 INCLINATION (I) 

LONG 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

LAT 

0 -25.8 -26.4 -26.8 -26.9 -26.8 -26.4 -25.6 -24.3 -22.9 -21.5 -20.3 -19.6 -19.4 -19.6 -20.2 -20.8 -21.5 -21.9 -22.0 

-13.9 -12.4 -10.6 -8.3 -5.9 -3.6 -1.5 0.3 1.8 3.1 4.3 5.3 6.2 6.7 6.8 6.4 5.6 4.5 3.4 

-5 -35.9 -36.8 -37.4 -37.8 -37.9 -37.5 -36.7 -35.5 -34.0 -32.6 -31.4 -30.7 -30.4 -30.5 -31.0 -31.6 -32.1 -32.5 -32.5 

-14.0 -12.7 -10.9 -8.8 -6.4 -4.0 -1.7 0.2 1.8 3.1 4.2 5.2 5.9 6.3 6.3 5.9 5.1 4.0 2.8 

-10 -44.3 -45.6 -46.5 -47.1 -47.3 -47.0 -46.2 -45.0 -43.6 -42.2 -41.0 -40.2 -39.9 -40.0 -40.4 -40.9 -41.3 -41.6 -41.7 

-13.7 -12.6 -11.0 -8.9 -6.6 -4.1 -1.8 0.2 1.9 3.2 4.2 5.0 5.5 5.8 5.7 5.2 4.3 3.3 2.1 

-15 -51.1 -52.6 -53.8 -54.5 -54.8 -54.6 -53.9 -52.7 -51.3 -49.9 -48.8 -48.0 -47.7 -47.8 -48.1 -48.6 -49.1 -49.4 -49.4 

-13.1 -12.1 -10.7 -8.8 -6.5 -4.0 -1.6 0.4 2.1 3.4 4.3 4.8 5.1 5.1 4.9 4.3 3.5 2.5 1.4 

-20 -56.2 -57.9 -59.3 -60.1 -60.5 -60.3 -59.6 -58.4 -57.0 -55.7 -54.6 -53.9 -53.7 -53.8 -54.2 -54.8 -55.3 -55.7 -55.9 

-12.3 -11.5 -10.2 -8.4 -6.1 -3.7 -1.2 0.9 2.6 3.8 4.4 4.7 4.6 4.4 4.0 3.4 2.6 1.7 0.7 

-25 -59.8 -61.6 -63.0 -63.9 -64.2 -64.0 -63.2 -62.0 -60.7 -59.4 -58.5 -57.9 -57.9 -58.2 -58.8 -59.5 -60.2 -60.8 -61.1 

-11.2 -10.5 -9.3 -7.6 -5.4 -2.9 -0.5 1.6 3.2 4.2 4.5 4.4 4.0 3.5 2.9 2.3 1.6 0.8 -0.1 

-30 -62.2 -63.8 -65.1 -65.8 -66.0 -65.6 -64.8 -63.6 -62.4 -61.3 -60.6 -60.4 -60.6 -61.2 -62.0 -62.9 -63.9 -64.7 -65.3 

-10.0 -9.3 -8.1 -6.3 -4.2 -1.8 0.6 2.5 3.8 4.4 4.3 3.8 3.1 2.4 1.8 1.2 0.6 o.o -0.7 

-35 -63.3 -64.7 -65.7 -66.1 -66.1 -65.6 -64.7 -63.7 -62.6 -61.9 -61.5 -61.6 -62.2 -63.0 -64.1 -65.4 -66.6 -67.7 -68.6 

-8.7 -7.7 -6.4 -4.6 -2.5 -0.3 1.8 3.3 4.2 4.3 3.8 3.0 2.1 1.2 0.6 0.1 -0.4 -0.8 -1.2 

-40 -63.4 -64.4 -65.1 -65.3 -65.1 -64.5 -63.7 -62.8 -62.2 -61.8 -61.8 -62.3 -63.1 -64.3 -65.6 -67.0 -68.5 -69.9 -71.1 

-7.0 -5.8 -4.3 -2.6 -0.6 1.3 2.8 3.8 4.2 3.9 3.1 2.1 1.2 0.3 -0.3 -0.7 -1.0 -1.3 -1.5 

-45 -62.6 -63.3 -63.7 -63.8 -63.5 -63.0 -62.4 -61.9 -61.6 -61.6 -62.0 -62.8 -63.8 -65.1 -66.6 -68.2 -69.9 -71.5 -73.0 

-5.1 -3.7 -2.2 -o.s 1.1 2.5 3.6 4.1 4.o 3.4 2.s 1.6 o.6 -0.1 -o.7 -1.0 -1.2 -1.3 -1.4 

-so -61.s -62.0 -62.2 -62.2 -62.1 -61.8 -61.5 -61.4 -61.4 -61.8 -62.4 -63.3 -64.5 -65.9 -67.5 -69.1 -70.8 -72.6 -74.3 

-3.0 -1.6 -0.1 1.3 2.5 3.5 4.0 4.1 3.8 3.2 2.4 1.5 0.7 o.o -0.4 -0.7 -0.9 -0.9 -0.9 

-55 -60.6 -60.9 -61.1 -61.2 -61.2 -61.2 -61.2 -61.4 -61.7 -62.3 -63.1 -64.1 -65.3 -66.7 -68.2 -69.9 -71.6 -73.3 -75.1 

-1.0 0.3 1.5 2.6 3.4 4.0 4.3 4.2 3.8 3.3 2.6 1.9 1.2 0.7 0.3 o.o -0.1 -0.1 -0.1 

-60 -60.3 -60.6 -60.8 -61.0 -61.2 -61.4 -61.6 -62.0 -62.5 -63.2 -64.0 -65.1 -66.2 -67.6 -69.0 -70.5 -72.1 -73.8 -75.5 

0.6 1.6 2.5 3.3 3.9 4.3 4.4 4.3 4.0 3.5 3.0 2.5 2.0 1.6 1.2 1.0 0.9 0.9 0.9 

-65 -60.8 -61.1 -61.4 -61.7 -61.9 -62.3 -62.7 -63.2 -63.8 -64.5 -65.3 -66.3 -67.3 -68.5 -69.8 -71.2 -72.6 -74.1 -75.6 

1.6 2.4 3.0 3.6 4.0 4.2 4.3 4.2 4.0 3.7 3.4 3.1 2.7 2.4 2.2 2.0 1.9 1.8 1.7 

-70 -62.3 -62.5 -62.8 -63.1 -63.4 -63.8 -64.3 -64.8 -65.4 -66.1 -66.8 -67.7 -68.6 -69.6 -70.7 -71.8 -73.0 -74.3 -75.5 

2.2 2.7 3.1 3.5 3.7 3.9 4.0 4.0 3.9 3.8 3.6 3.4 3.2 3.0 2.8 2.7 2.5 2.4 2.4 

-75 -64.5 -64.7 -64.9 -65.2 -65.5 -65.9 -66.3 -66.8 -67.3 -67.9 -68.5 -69.2 -70.0 -70.8 -71.6 -72.5 -73.4 -74.4 -75.3 

2.4 2.7 2.9 3.1 3.3 3.4 3.5 3.5 3.5 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.8 2.7 

-80 -67.2 -67.4 -67.6 -67.8 -68.1 -68.4 -68.7 -69.1 -69.4 -69.9 -70.4 -70.9 -71.4 -71.9 -72.5 -73.1 -73.7 -74.4 -75.0 

2.3 2.5 2.6 2.7 2.8 2.9 2.9 3.0 3.0 3.0 3.0 3.0 3.0 2.9 2.9 2.8 2.8 2.7 2.7 

-85 -70.4 -70.4 -70.6 -70.7 -70.8 -71.0 -71.2 -71.4 -71.6 -71.9 -72.1 -72.4 -72.7 -73.0 -73.3 -73.6 -73.9 -74.2 -74.5 

2.2 2.2 2.3 2.3 2.3 2.4 2.4 2.4 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.4 2.4 2.4 

-90 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 

2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 
-o 

IGRF 1980 INCLINATION (I) 

LONG 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 18 0 

LAT 

0 -22.0 -21.8 -21.2 -20.5 -19.6 -18.8 -18.3 -17.9 -17.6 -17.4 -17.0 -16.5 -15.6 -14.5 -13.1 -11.3 -9.3 -7.0 -4.7 

3.4 2.4 1.5 0.8 o.o -0.9 -2.0 -3.2 -4.4 -5.3 -5.9 -5.9 -5.4 -4.5 -3.5 -2.4 -1.4 -0.5 0.4 

-5 -32.5 -32.2 -31.6 -30.8 -29.9 -29.1 -28.4 -27.9 -27.5 -27.2 -26.7 -26.1 -25.2 -24.1 -22.7 -21.0 -19.2 -17.1 -14.9 

2.8 1.7 0.8 o.o -0.8 -1.6 -2.4 -3.4 -4.3 -5.0 -5.3 -5.3 -4.8 -4.1 -3.2 -2.2 -1.3 -0.4 0.4 

-10 -41.7 -41.4 -40.8 -40.0 -39.1 -38.2 -37.5 -37.0 -36.6 -36.1 -35.6 -34.9 -34.1 -33.0 -31.7 -30.2 -28.5 -26.7 -24.8 

2.1 1.0 o.o -0.8 -1.5 -2.1 -2.8 -3.4 -4.0 -4.4 -4.6 -4.4 -4.0 -3.4 -2.7 -1.9 -1.2 -0.4 0.4 

-15 -49.4 -49.2 -48.7 -47.9 -47.1 -46.3 -45.6 -45.0 -44.6 -44.1 -43.6 -42.9 -42.1 -41.1 -39.9 -38.6 -37.1 -35.5 -33.8 

1.4 0.3 -0.6 -1.4 -2.1 -2.6 -3.0 -3.4 -3.7 -3.8 -3.8 -3.6 -3.2 -2.7 -2.2 -1.6 -1.0 -0.3 0.4 

-20 -55.9 -55.8 -55.4 -54.8 -54.1 -53.3 -52.7 -52.1 -51.6 -51.2 -50.6 -50.0 -49.2 -48.3 -47.2 -46.0 -44.7 -43.3 -41.8 

0.7 -0.3 -1.2 -2.0 -2.5 -2.9 -3.2 -3.3 -3.3 -3.3 -3.1 -2.9 -2.5 -2.1 -1.7 -1.3 -0.8 -0.3 0.3 

-25 -61.1 -61.2 -61.0 -60.6 -60.1 -59.5 -58.9 -58.3 -57.9 -57.4 -56.8 -56.2 -55.5 -54.6 -53.7 -52.6 -51.4 -50.1 -48.8 

-0.1 -0.9 -1.7 -2.4 -2.8 -3.1 -3.2 -3.2 -3.1 -2.9 -2.6 -2.3 -2.0 -1.7 -1.3 -1.0 -0.6 -0.2 0.2 

-30 -65.3 -65.7 -65.8 -65.6 -65.2 -64.8 -64.3 -63.8 -63.3 -62.8 -62.3 -61.7 -61.0 -60.2 -59.3 -58.3 -57.2 -56.0 -54.8 

-0.7 -1.4 -2.1 -2.6 -3.0 -3.2 -3.2 -3.1 -2.9 -2.7 -2.3 -2.0 -1.7 -1.4 -1.1 -0.8 -0.5 -0.2 0.2 

-35 -68.6 -69.3 -69.7 -69.8 -69.7 -69.4 -69.1 -68.6 -68.2 -67.7 -67.1 -66.5 -65.8 -65.0 -64.1 -63.2 -62.1 -61.1 -59.9 

-1.2 -1.7 -2.2 -2.6 -3.0 -3.1 -3.2 -3.0 -2.8 -2.5 -2.2 -1.9 -1.6 -1.3 -1.0 -0.7 -0.5 -0.2 0.1 

-40 -71.1 -72.1 -72.9 -73.4 -73.6 -73.5 -73.3 -72.9 -72.5 -72.0 -71.4 -70.8 -70.0 -69.2 -68.4 -67.4 -66.4 -65.4 -64.4 

-1.5 -1.8 -2.1 -2.5 -2.7 -2.9 -3.0 -2.9 -2.8 -2.5 -2.2 -1.9 -1.6 -1.3 -1.0 -0.7 -0.5 -0.2 0.1 

-45 -73.0 -74.3 -75.4 -76.3 -76.8 -77.1 -77.1 -76.8 -76.5 -75.9 -75.3 -74.6 -73.9 -73.1 -72.2 -71.3 -70.3 -69.3 -68.3 

-1.4 -1.6 -1.8 -2.0 -2.3 -2.6 -2.7 -2.8 -2.7 -2.5 -2.3 -2.0 -1.7 -1.4 -1.1 -0.8 -0.5 -0.2 0.1 

-50 -74.3 -75.9 -77.3 -78.5 -79.4 -80.1 -80.4 -80.4 -80.1 -79.7 -79.0 -78.3 -77.5 -76.6 -75.7 -74.8 -73.8 -72.8 -71.8 

-0.9 -1.0 -1.1 -1.3 -1.6 -2.0 -2.3 -2.5 -2.6 -2.5 -2.4 -2.1 -1.8 -1.4 -1.1 -0.7 -0.4 -0.1 0.1 

-55 -75.1 -76.8 -78.4 -79.9 -81.3 -82.4 -83.2 -83.6 -83.6 -83.2 -82.6 -81.8 -81.0 -80.0 -79.1 -78.1 -77.1 -76.1 -75.1 

-0.1 -0.1 -0.2 -0.3 -0.6 -1.0 -1.6 -2.1 -2.4 -2.5 -2.4 -2.1 -1.8 -1.4 -1.0 -0.6 -0.3 o.o 0.3 

-60 -75.5 -77.2 -78.9 -80.5 -82.1 -83.6 -84.9 -86.0 -86.6 -86.6 -86.1 -85.3 -84.3 -83.3 -82.3 -81.2 -80.2 -79.2 -78.2 

0.9 0.9 0.9 0.8 0.6 0.4 -0.1 -0.9 -1.8 -2.4 -2.4 -2.0 -1.6 -1.1 -0.7 -0.3 o.o 0.3 0.5 

-65 -75.6 -77.1 -78.7 -80.3 -81.8 -83.3 -84.8 -86.2 -87.6 -89.0 -89.6 -88.4 -87.2 -86.1 -84.9 -83.9 -82.8 -81.8 -80.8 

1.7 1.7 1.7 1.7 1.7 1.6 1.5 1.3 1.0 0.5 -2.1 -0.9 -0.5 -0.2 0.1 0.4 0.7 0.9 1.0 

-70 -75.5 -76.8 -78.1 -79.4 -80.7 -81.9 -83.1 -84.3 -85.4 -86.3 -86.9 -87.2 -87.0 -86.5 -85.8 -85.0 -84.1 -83.3 -82.4 

2.4 2.3 2.3 2.3 2.2 2.2 2.2 2.2 2.2 2.3 2.3 2.3 2.0 1.8 1.6 1.6 1.6 1.6 1.6 

-75 -75.3 -76.3 -77.3 -78.2 -79.2 -80.1 -80.9 -81.7 -82.4 -83.0 -83.5 -83.9 -84.0 -84.0 -83.8 -83.5 -83.1 -82.6 -82.0 

2.7 2.6 2.5 2.5 2.4 2.4 2.4 2.3 2.3 2.3 2.3 2.2 2.2 2.2 2.1 2.1 2.0 2.0 2.0 

-80 -75.0 -75.6 -76.3 -76.9 -77.5 -78.1 -78.6 -79.1 -79.5 -79.9 -80.2 -80.4 -80.6 -80.7 -80.7 -80.6 -80.4 -80.2 -79.9 

2.7 2.6 2.5 2.5 2.4 2.4 2.4 2.3 2.3 2.2 2.2 2.2 2.1 2.1 2.1 2.1 2.0 2.0 2.0 

-85 -74.5 -74.8 -75.1 -75.4 -75.7 -75.9 -76.2 -76.4 -76.6 -76.8 -76.9 -77.0 -77.1 -77.2 -77.2 -77.2 -77.1 -77.1 -77.0 

2.4 2.4 2.3 2.3 2.3 2.3 2.2 2.2 2.2 2.2 2.1 2.1 2.1 2.1 2.0 2.0 2.0 2.0 2.0 

-90 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 

2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 
I'.) 

0 

LONG 

LAT 

0 

-5 

IGRF 1980 INCLINATION (I) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

-4.7 -2.5 -0.6 1.0 2.2 3.2 4.0 4.9 5.8 6.6 7.5 8.3 9.1 10.1 11.4 12.9 14.8 16.9 19.1 

0.4 1.1 1.7 1.9 1.6 0.9 -0.2 -1.2 -1.7 -1.3 0.1 2.4 5.0 7.5 9.2 9.9 9.5 8.4 6.8 

-14.9 -12.9 -11.1 -9.6 -8.4 -7.3 -6.4 -5.4 -4.4 -3.5 -2.6 -1.7 -0.8 

0.4 1.2 1.8 2.0 1.8 1.1 0.1 -0.7 -1.0 -0.5 1.1 3.4 6.1 

0.2 1.4 3.0 s.o 

8.5 10.1 10.6 10.0 

7.2 

8.7 

9. 6 

7.0 

-10 -24.8 -22.9 -21.3 -19.8 -18.6 -17.5 -16.5 -15.5 -14.4 -13.4 -12.4 -11.5 -10.6 -9.6 -8.4 -6.8 -4.9 -2.6 -0.2 

0.4 1.1 1.7 1.9 1.8 1.2 o.s -0.2 -0.3 0.4 2.0 4.2 6.7 8.8 10.2 10.4 9.7 8.3 6.5 

-15 -33.8 -32.2 -30.7 -29.3 -28.1 -27.0 -25.9 -24.9 -23.8 -22.7 -21.7 -20.8 -19.8 -18.9 -17.7 -16.2 -14.4 -12.2 -9.8 

0.4 1.0 1.5 1.8 1.7 1.3 0.7 0.3 0.4 1.1 2.6 4.6 6.7 8.4 9.4 9.4 8.6 7.1 5.5 

-20 -41.8 -40.4 -39.0 -37.7 -36.6 -35.5 -34.4 -33.3 -32.2 -31.1 -30.1 -29.2 -28.3 -27.3 -26.2 -24.8 -23.1 -21.1 -18.8 

0.3 0.9 1.3 1.5 1.5 1.2 0.9 0.7 0.9 1.5 2.8 4.4 6.0 7.3 7.9 7.7 6.9 5.6 4.1 

-25 -48.8 -47.5 -46.2 -45.1 -43.9 -42.8 -41.8 -40.7 -39.6 -38.6 -37.6 -36.7 -35.8 -34.8 -33.8 -32.5 -30.9 -29.0 -26.9 

0.2 0.7 1.0 1.2 1.3 1.1 0.9 0.8 1.0 1.5 2.5 3.7 4.9 5.7 6.0 5.7 4.9 3.8 2.6 

-30 -54.8 -53.6 -52.4 -51.3 -50.2 -49.2 -48.2 -47.1 -46.1 -45.1 -44.2 -43.2 -42.3 -41.4 -40.3 -39.0 -37.5 -35.8 -33.8 

0.2 o.s 0.8 1.0 1.0 0.9 0.7 0.6 0.8 1.2 1.9 2.7 3.4 3.9 4.1 3.8 3.1 2.3 1.3 

-35 -59.9 -58.8 -57.7 -56.7 -55.6 -54.6 -53.7 -52.7 -51.7 -50.8 -49.9 -48.9 -48.0 -47.0 -45.9 -44.6 -43.1 -41.4 -39.5 

0.1 0.4 0.6 0.7 0.7 0.6 0.4 0.3 0.4 0.6 1.0 1.5 2.0 2.3 2.3 2.1 1.7 1.1 0.4 

-40 -64.4 -63.3 -62.3 -61.3 -60.3 -59.4 -58.4 -57.5 -56.6 -55.7 -54.8 -53.8 -52.8 -51.8 -50.6 -49.2 -47.7 -46.0 -44.1 

0.1 0.3 0.4 o.s 0.4 0.3 0.1 o.o 0.0 0.1 0.3 o.s 0.8 1.0 1.0 0.9 0.7 0.4 o.o 

-45 -68.3 -67.3 -66.3 -65.4 -64.4 -63.5 -62.7 -61.8 -60.9 -60.0 -59.1 -58.1 -57.0 -55.8 -54.5 -53.1 -51.5 -49.8 -48.0 

0.1 0.2 0.3 0.3 0.3 0.1 -0.1 -0.2 -0.3 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.3 0.3 0.1 o.o 

-so -71.8 -70.9 -69.9 -69.0 -68.1 -67.3 -66.4 -65.6 -64.7 -63.8 -62.8 -61.7 -60.6 -59.3 -57.9 -56.4 -54.9 -53.2 -s1.s 

0.1 0.3 0.4 0.3 0.3 0.1 o.o -0.2 -0.3 -0.4 -0.4 -0.3 -0.2 o.o 0.1 0.2 0.3 0.3 0.2 

-55 -75.1 -74.2 -73.3 -72.4 -71.5 -70.7 -69.8 -68.9 -68.0 -67.0 -66.0 -64.9 -63.7 -62.4 -61.0 -59.5 -57.9 -56.4 -54.8 

0.3 0.4 o.s o.s 0.4 0.3 0.2 o.o -0.1 -0.1 -0.1 -0.1 o.o 0.2 0.3 0.4 o.s 0.6 0.5 

-60 -78.2 -77.3 -76.4 -75.5 -74.6 -73.7 -72.8 -71.9 -70.9 -69.9 -68.8 -67.6 -66.4 -65.1 -63.8 -62.4 -60.9 -59.5 -58.2 

o.s 0.7 0.8 0.8 0.7 0.7 0.6 0.5 0.4 0.4 0.4 0.4 o.s 0.6 0.7 0.8 0.9 0.9 0.8 

-65 -80.8 -79.9 -78.9 -78.0 -77.1 -76.2 -75.3 -74.3 -73.3 -72.3 -71.2 -70.1 -68.9 -67.6 -66.4 -65.1 -63.9 -62.7 -61.5 

1.0 1.1 1.2 1.2 1.2 1.1 1.1 1.0 1.0 0.9 0.9 1.0 1.0 1.1 1.1 1.1 1.1 1.1 1.0 

-70 -82.4 -81.5 -80.6 -79.7 -78.8 -77.9 -77.0 -76.1 -75.1 -74.1 -73.1 -72.1 -71.0 -69.9 -68.8 -67.8 -66.7 -65.7 -64.8 

1.6 1.6 1.6 1.6 1.6 1.6 1.5 1.5 1.5 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.3 1.3 1.2 

-75 -82.o -81.4 -80.7 -8o.o -79.3 -78.s -77.7 -76.9 -76.1 -75.3 -74.4 -73.5 -72.7 -71.8 -70.9 -10.1 -69.3 -68.5 -67.8 

2.0 1.9 1.9 1.9 1.9 1.8 1.8 1.7 1.7 1.7 1.6 1.6 1.6 1.6 1.5 1.5 1.4 1.3 1.3 

-80 -79.9 -79.6 -79.2 -78.8 -78.3 -77.8 -77.3 -76.7 -76.1 -75.6 -75.0 -74.4 -73.7 -73.1 -72.5 -72.0 -71.4 -70.8 -70.3 

2.0 2.0 1.9 1.9 1.9 1.9 1.8 1.8 1.8 1.7 1.7 1.7 1.6 1.6 1.6 1.5 1.5 1.5 1.4 

-85 -77.0 -76.8 -76.7 -76.5 -76.3 -76.1 -75.8 -75.5 -75.3 -75.0 -74.7 -74.4 -74.1 -73.8 -73.5 -73.2 -72.9 -72.6 -72.3 

2.0 1.9 1.9 1.9 1.9 1.9 1.8 1.8 1.8 1.8 1.8 1.8 1.7 1.7 1.7 1.7 1.7 1.7 1.7 

-90 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 

2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 
t-.J 

..... 

IGRF 1980 INCLINATION (I) 

LONG -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

LAT 

0 19.1 21.2 23.0 24.1 24.4 23.7 21.9 19.0 15.0 10.1 4.6 -1.2 -6.9 -12.2 -16.8 -20.4 -23.0 -24.7 -25.8 

6.8 s.o 3.1 1.1 -1.5 -4.8 -8.9 -13.5 -18.1 -21.9 -24.3 -25.1 -24.3 -22.4 -20.2 -18.2 -16.5 -15.1 -13.9 

-5 9.6 11.9 13.9 15.3 15.8 15.2 13.4 10.4 6.3 1.3 -4.3 -10.2 -16.0 -21.4 -26.0 -29.7 -32.5 -34.5 -35.9 

7.0 5.2 3.4 1.4 -1.1 -4.4 -8.7 -13.5 -18.2 -22.1 -24.5 -25.1 -24.2 -22.2 -20.0 -17.9 -16.4 -15.1 -14.0 

-10 -0.2 2.3 4.4 6.0 6.6 6.2 4.5 1.6 -2.5 -7.4 -12.9 -18.6 -24.2 -29.3 -33.8 -37.5 -40.5 -42.7 -44.3 

6.5 4.8 3.1 1.3 -1.1 -4.3 -8.5 -13.2 -17.8 -21.5 -23.7 -24.1 -23.1 -21.2 -19.0 -17.1 -15.7 -14.7 -13.7 

-15 -9.8 -7.4 -5.2 -3.5 -2.7 -2.9 -4.5 -7.2 -11.1 -15.7 -20.8 -26.1 -31.2 -36.0 -40.2 -43.8 -46.8 -49.2 -51.1 

s.s 3.9 2.4 0.7 -1.5 -4.4 -8.3 -12.7 -16.8 -20.1 -22.0 -22.2 -21.2 -19.5 -17.5 -15.9 -14.7 -13.9 -13.1 

-20 -18.8 -16.5 -14.3 -12.6 -11.7 -11.8 -13.1 -15.6 -19.1 -23.3 -27.9 -32.6 -37.2 -41.5 -45.4 -48.8 -51.7 -54.1 -56.2 

4.1 2.7 1.4 -0.1 -2.0 -4.7 -8.1 -11.9 -15.6 -18.3 -19.8 -20.0 -19.1 -17.6 -15.9 -14.5 -13.5 -12.8 -12.3 

-25 -26.9 -24.7 -22.6 -21.0 -20.0 -19.9 -21.0 -23.1 -26.2 -29.9 -33.9 -38.1 -42.2 -45.9 -49.4 -52.5 -55.3 -57.7 -59.8 

2.6 1.5 0.4 -0.9 -2.6 -4.9 -7.9 -11.1 -14.1 -16.4 -17.6 -17.8 -17.0 -15.7 -14.3 -13.1 -12.3 -11.7 -11.2 

-30 -33.8 -31.7 -29.8 -28.2 -27.2 -27.0 -27.8 -29.6 -32.2 -35.4 -38.9 -42.6 -46.1 -49.4 -52.5 -55.3 -57.9 -60.2 -62.2 

1.3 0.4 -0.5 -1.6 -3.0 -5.0 -7.5 -10.2 -12.7 -14.6 -15.6 -15.7 -15.1 -14.1 -13.0 -12.0 -11.2 -10.6 -10.0 

-35 -39.5 -37.6 -35.7 -34.2 -33.2 -32.9 -33.5 -34.9 -37.1 -39.9 -42.9 -46.0 -49.1 -52.1 -54.8 -57.3 -59.5 -61.6 -63.3 

0.4 -0.2 -1.0 -1.9 -3.2 -4.9 -7.0 -9.2 -11.3 -12.8 -13.7 -13.9 -13.5 -12.8 -11.8 -10.9 -10.1 -9.4 -8.7 

-40 -44.1 -42.3 -40.6 -39.1 -38.2 -37.8 -38.2 -39.4 -41.1 -43.4 -46.0 -48.6 -51.3 -53.8 -56.2 -58.4 -60.3 -62.0 -63.4 

o.o -0.5 -1.0 -1.8 -2.9 -4.4 -6.2 -8.0 -9.8 -11.1 -12.0 -12.3 -12.1 -11.5 -10.7 -9.8 -9.0 -8.1 -7.0 

-45 -48.0 -46.3 -44.7 -43.4 -42.4 -42.1 -42.3 -43.1 -44.5 -46.3 -48.3 -50.6 -52.8 -54.9 -56.9 -58.7 -60.3 -61.6 -62.6 

o.o -0.3 -0.8 -1.5 -2.4 -3.7 -5.1 -6.7 -8.2 -9.4 -10.2 -10.5 -10.4 -10.0 -9.3 -8.4 -7.4 -6.3 -5.1 

-so -51.5 -49.9 -48.4 -47.2 -46.4 -45.9 -46.o -46.5 -47.5 -48.8 -50.4 -s2.1 -53.9 -55.6 -57.2 -58.6 -59.8 -60.8 -61.s 

0.2 o.o -0.4 -0.9 -1.8 -2.8 -4.0 -5.2 -6.4 -7.5 -8.2 -8.5 -8.5 -8.1 -7.5 -6.6 -5.5 -4.3 -3.0 

-55 -54.8 -53.4 -52.1 -51.0 -50.2 -49.7 -49.6 -49.9 -50.5 -51.4 -52.5 -53.7 -55.0 -56.2 -57.4 -58.4 -59.3 -60.0 -60.6 

o.s 0.4 0.1 -0.4 -1.1 -1.9 -2.8 -3.8 -4.7 -5.5 -6.0 -6.3 -6.2 -5.9 -5.3 -4.5 -3.4 -2.3 -1.0 

-60 -58.2 -56.9 -55.8 -54.8 -54.1 -53.6 -53.3 -53.4 -53.7 -54.2 -54.8 -55.6 -56.4 -57.2 -58.0 -58.7 -59.3 -59.8 -60.3 

0.8 0.7 0.4 o.o -0.5 -1.1 -1.7 -2.4 -3.0 -3.5 -3.9 -4.0 -3.9 -3.6 -3.1 -2.3 -1.4 -0.4 0.6 

-65 -61.5 -60.4 -59.5 -58.6 -58.0 -57.5 -57.2 -57.0 -57.1 -57.2 -57.5 -57.9 -58.3 -58.8 -59.3 -59.7 -60.1 -60.5 -60.8 

1.0 0.9 0.7 0.4 o.o -0.4 -0.8 -1.2 -1.6 -1.8 -2.0 -2.0 -1.9 -1.6 -1.1 -0.5 0.2 0.9 1.6 

-70 -64.8 -63.9 -63.1 -62.4 -61.8 -61.3 -60.9 -60.7 -60.5 -60.5 -60.6 -60.7 -60.8 -61.0 -61.3 -61.5 -61.8 -62.0 -62.3 

1.2 1.0 0.9 0.7 0.5 0.2 o.o -0.2 -0.4 -0.5 -0.5 -0.4 -0.3 o.o 0.3 0.7 1.2 1.7 2.2 

-75 -67.8 -67.1 -66.4 -65.9 -65.3 -64.9 -64.5 -64.3 -64.0 -63.9 -63.8 -63.7 -63.7 -63.8 -63.9 -64.0 -64.1 -64.3 -64.5 

1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.6 0.6 0.6 0.7 0.8 1.0 1.3 1.5 1.8 2.1 2.4 

-80 -70.3 -69.8 -69.4 -68.9 -68.6 -68.2 -67.9 -67.6 -67.4 -67.2 -67.1 -67.0 -66.9 -66.9 -66.9 -66.9 -67.0 -67.1 -67.2 

1.4 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.4 1.5 1.6 1.8 1.9 2.0 2.2 2.3 

-85 -72.3 -72.0 -71.8 -71.5 -71.3 -71.1 -70.9 -70.8 -70.6 -70.5 -70.4 -70.3 -70.3 -70.2 -70.2 -70.2 -70.2 -70.3 -70.4 

1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.8 1.8 1.8 1.9 1.9 2.0 2.0 2.1 2.1 2.2 

-90 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 -73.7 

2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 
II.) 

II.) 

LONG 

LAT 

90 

85 

IGRF 1980 HORIZONTAL INTENSITY (H) 

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 

-18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 

4820 4839 4841 4825 4792 4741 4674 4589 4488 4371 4239 4093 3933 3761 3579 3389 3193 2995 2797 

-13.0 -13.5 -14.1 -14.6 -15.2 -15.7 -16.3 -16.9 -17.5 -18.1 -18.7 -19.2 -19.8 -20.3 -20.8 -21.2 -21.6 -21.9 -22.1 

80 7086 7127 7141 7128 7088 7019 6922 6795 6638 6451 6233 5985 5708 5404 5078 4733 4378 4021 3677 

-7.8 -8.7 -9.7 -10.7 -11.8 -12.9 -14.0 -15.1 -16.2 -17.3 -18.4 -19.4 -20.4 -21.3 -22.1 -22.7 -23.2 -23.4 -23.2 

75 9126 9184 9213 9213 9183 9123 9031 8905 8741 8539 8295 8009 7680 7310 6905 6473 6028 5589 5183 

-1.7 -3.0 -4.3 -5.7 -7.2 -8.6 -10.1 -11.7 -13.2 -14.7 -16.1 -17.4 -18.7 -19.8 -20.7 -21.3 -21.7 -21.5 -20.8 

70 11075 11134 11167 11175 11159 11117 11049 10949 10816 10644 10429 10166 9854 9494 9089 8653 8202 7766 7380 

4.3 2.7 1.1 -0.6 -2.3 -4.0 -5.7 -7.4 -9.0 -10.6 -12.1 -13.5 -14.7 -15.8 -16.6 -17.2 -17.4 -17.2 -16.4 

65 13064 13109 13131 13136 13124 13096 13053 12990 12905 12790 12641 12451 12214 11930 11600 11237 10860 10499 10193 

9.1 7.3 5.4 3.5 1.6 -0.2 -2.0 -3.7 -5.2 -6.7 -7.9 -9.0 -10.0 -10.8 -11.4 -11.9 -12.1 -12.2 -12.0 

60 15185 15206 15210 15201 15184 15163 15137 15108 15071 15023 14957 14864 14739 14576 14375 14144 13899 13665 13476 

12.6 10.4 8.2 6.0 3.8 1.8 -0.1 -1.7 -3.1 -4.3 -5.2 -5.9 -6.5 -6.9 -7.3 -7.6 -8.0 -8.4 -8.8 

55 17472 17477 17466 17447 17424 17404 17390 17384 17388 17399 17412 17420 17417 17395 17351 17286 17206 17129 17077 

15.2 12.6 9.9 7.2 4.6 2.1 o.o -1.7 -3.1 -4.2 -4.9 -5.4 -5.7 -5.9 -6.0 -6.2 -6.5 -7.1 -7.9 

50 19920 19927 19918 19901 19883 19869 19866 19879 19911 19965 20042 20138 20248 20365 20481 20589 20684 20771 20856 

18.1 14.9 11.6 8.3 5.0 1.9 -0.8 -3.0 -4.7 -6.0 -7.0 -7.6 -8.0 -8.1 -8.1 -8.1 -8.2 -8.6 -9.3 

45 22490 22522 22538 22545 22549 22555 22570 22599 22652 22735 22855 23018 23221 23459 23720 23988 24247 24483 24689 

22.5 18.8 14.9 10.7 6.5 2.6 -0.9 -4.0 -6.5 -8.6 -10.3 -11.6 -12.5 -13.0 -13.2 -13.1 -12.8 -12.6 -12.7 

40 25114 25192 25253 25305 25351 25394 25438 25489 25559 25661 25811 26020 26295 26629 27008 27408 27800 28155 28451 

28.8 24.8 20.3 15.3 10.3 5.3 0.7 -3.4 -7.1 -10.4 -13.3 -15.8 -17.8 -19.2 -19.8 -19.6 -18.9 -17.9 -16.9 

35 27683 27820 27940 28053 28158 28254 28340 28422 28512 28630 28801 29044 29370 29776 30242 30738 31222 31655 32001 

36.2 32.2 27.3 21.9 16.1 10.2 4.5 -0.8 -5.8 -10.5 -15.0 -19.0 -22.4 -24.8 -26.0 -25.9 -24.7 -22.8 -20.6 

30 30027 30230 30421 30605 30782 30943 31082 31203 31320 31459 31650 31921 32286 32742 33265 33818 34351 34817 35174 

42.5 39.0 34.3 28.7 22.4 15.9 9.3 3.0 -3.2 -9.3 -15.2 -20.6 -25.3 -28.8 -30.5 -30.5 -28.8 -26.0 -22.5 

25 31913 32190 32460 32728 32984 33217 33417 33584 33737 33904 34123 34424 34823 35315 35870 36447 36993 37456 37795 

45.1 42.5 38.5 33.2 26.9 20.0 13.0 5.9 -1.0 -7.9 -14.6 -21.0 -26.4 -30.4 -32.3 -32.1 -29.9 -26.1 -21.5 

20 33084 33441 33800 34156 34496 34803 35064 35284 35481 35690 35949 36290 36727 37250 37826 38409 38947 39390 39700 

41.4 40.0 37.0 32.4 26.6 20.0 12.9 5.8 -1.2 -8.0 -14.7 -20.8 -26.0 -29.7 -31.2 -30.3 -27.4 -22.9 -17.3 

15 33317 33754 34201 34644 35062 35435 35755 36029 36282 36548 36866 37266 37755 38317 38917 39508 40040 40470 40763 

29.9 29.8 28.1 24.6 19.6 13.7 7.4 1.0 -5.2 -11.0 -16.3 -21.0 -24.8 -27.0 -27.2 -25.3 -21.6 -16.3 -10.2 

10 32497 32995 33513 34021 34494 34915 35283 35612 35931 36275 36678 37162 37728 38352 38997 39615 40164 40608 40922 

10.8 12.0 11.5 9.3 5.6 1.0 -3.9 -8.8 -13.1 -16.7 -19.6 -21.7 -22.7 -22.5 -20.8 -17.5 -12.9 -7.3 -1.1 

5 30671 31184 31725 32253 32740 33178 33576 33959 34356 34799 35315 35915 36589 37306 38025 38703 39304 39803 40182 

-13.6 -11.7 -11.2 -12.0 -14.0 -16.6 -19.3 -21.8 -23.5 -24.0 -23.5 -22.0 -19.6 -16.4 -12.3 -7.6 -2.4 3.1 8.6 

0 28051 28505 28995 29473 29918 30334 30743 31176 31662 32225 32881 33626 34437 35275 36096 36863 37548 38137 38624 

-40.0 -37.9 -36.7 -36.2 -36.0 -36.0 -35.8 -35.1 -33.5 -30.5 -26.1 -20.8 -14.8 -8.5 -2.3 3.5 8.7 13.3 17.4 
1'1.) 

(,) 

LONG 

LAT 

90 

IGRF 1980 HORIZONTAL INTENSITY (H) 

90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 17 5 180 

2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 

-18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 

85 2797 2602 2416 2241 2084 1948 1836 1753 1697 1668 1660 1669 1689 1713 1736 1752 1760 1755 1736 

-22.1 -22.3 -22.3 -22.1 -21.7 -21.1 -20.1 -18.8 -17.2 -15.5 -13.7 -12.0 -10.5 -9.3 -8.3 -7.5 -7.0 -6.8 -6.7 

80 3677 3362 3096 2901 2796 2792 2881 3048 3266 3513 3768 4015 4242 4440 4603 4726 4805 4840 4828 

-23.2 -22.5 -21.2 -18.9 -15.9 -12.3 -8.6 -5.3 -2.7 -0.7 0.7 1.5 2.0 2.3 2.3 2.1 1.8 1.5 1.1 

75 5183 4845 4611 4514 4570 4771 5090 5490 5934 6389 6830 7239 7600 7906 8149 8325 8432 8470 8439 

-20.8 -19.3 -16.9 -13.7 -10.1 -6.6 -3.6 -1.3 0.3 1.3 1.8 1.9 1.8 1.5 1.1 0.7 0.2 -0.4 -0.9 

70 7380 7089 6935 6950 7142 7495 7973 8531 9124 9716 10275 10779 11213 11569 11840 12025 12126 12143 12079 

-16.4 -15.1 -13.1 -10.8 -8.3 -6.0 -4.1 -2.8 -1.9 -1.5 -1.4 -1.5 -1.8 -2.1 -2.5 -2.8 -3.2 -3.5 -3.8 

65 10193 9986 9922 10027 10310 10751 11314 11951 12614 13262 13860 14385 14821 15161 15404 15553 15612 15588 15484 

-12.0 -11.5 -10.8 -9.8 -8.8 -7.8 -7.0 -6.4 -6.1 -6.0 -6.1 -6.2 -6.3 -6.3 -6.3 -6.2 -6.0 -5.8 -5.6 

60 13476 13373 13393 13561 13885 14351 14923 15558 16207 16826 17381 17847 18213 18473 18633 18702 18689 18605 18458 

-8.8 -9.3 -9.8 -10.2 -10.4 -10.5 -10.4 -10.4 -10.3 -10.3 -10.3 -10.2 -10.1 -9.7 -9.1 -8.4 -7.6 -6.7 -5.9 

55 17077 17082 17172 17370 17687 18114 18624 19179 19732 20244 20679 21017 21247 21373 21404 21355 21242 21083 20886 

-7.9 -9.0 -10.1 -11.3 -12.1 -12.7 -12.9 -12.9 -12.8 -12.6 -12.5 -12.2 -11.8 -11.1 -10.2 -9.0 -7.6 -6.2 -4.9 

50 20856 20958 21097 21292 21557 21890 22274 22681 23072 23410 23664 23818 23866 23816 23684 23491 23258 23007 22751 

-9.3 -10.3 -11.5 -12.6 -13.3 -13.5 -13.3 -12.8 -12.1 -11.6 -11.2 -10.9 -10.6 -10.0 -9.2 -8.0 -6.5 -4.9 -3.4 

45 24689 24868 25029 25189 25363 25559 25772 25983 26162 26280 26313 26248 26085 25836 25523 25171 24807 24453 24128 

-12.7 -13.0 -13.4 -13.7 -13.5 -12.6 -11.2 -9.5 -7.9 -6.7 -6.0 -5.9 -6.0 -6.1 -6.0 -5.5 -4.6 -3.5 -2.2 

40 28451 28676 28832 28930 28990 29025 29042 29031 28975 28851 28644 28346 27963 27514 27022 26514 26019 25561 25161 

-16.9 -16.0 -15.1 -14.0 -12.3 -9.8 -6.6 -3.3 -0.3 1.7 2.6 2.5 1.6 0.3 -1.0 -2.0 -2.4 -2.4 -2.0 

35 32001 32239 32363 32383 32318 32189 32009 31779 31490 31128 30687 30166 29580 28949 28300 27659 27052 26504 26033 

-20.6 -18.3 -15.8 -13.1 -9.6 -5.3 -0.3 4.7 9.1 12.1 13.3 12.8 10.9 8.1 5.0 2.1 -0.3 -1.9 -2.9 

30 35174 35395 35470 35406 35224 34947 34593 34171 33677 33108 32465 31757 31005 30234 29470 28737 28056 27445 26923 

-22.5 -18.7 -14.7 -10.4 -5.4 0.3 6.7 13.1 18.5 22.2 23.6 22.7 20.0 15.9 11.1 6.1 1.6 -2.0 -4.6 

25 37795 37980 38000 37861 37584 37193 36709 36143 35498 34776 33987 33150 32291 31439 30619 29850 29143 28510 27965 

-21.5 -16.4 -11.2 -5.8 0.1 6.6 13.5 20.2 25.9 29.7 31.0 30.0 26.7 21.8 15.7 9.3 3.0 -2.5 -6.8 

20 39700 39848 39826 39638 39304 38848 38290 37644 36917 36115 35256 34364 33470 32605 31793 31046 30366 29757 29223 

-17.3 -11.3 -5.3 0.7 6.7 12.8 19.0 24.9 29.7 32.8 33.7 32.5 29.2 24.2 17.8 10.7 3.4 -3.3 -8.9 

15 40763 40899 40867 40673 40333 39870 39304 38649 37916 37115 36265 35396 34541 33730 32985 32311 31706 31159 30669 

-10.2 -3.8 2.5 8.3 13.6 18.4 22.8 26.5 29.3 30.7 30.7 29.3 26.4 22.0 16.4 9.7 2.5 -4.6 -11.0 

10 40922 41087 41096 40952 40667 40261 39753 39159 38492 37766 37000 36225 35471 34768 34133 33571 33069 32612 32187 

-1.1 5.2 11.1 16.1 20.0 22.7 24.3 25.0 24.8 23.9 22.6 20.8 18.5 15.4 11.3 6.1 -0.1 -6.6 -12.9 

5 40182 40430 40539 40506 40338 40050 39661 39187 38644 38049 37423 36792 36183 35622 35124 34689 34305 33948 33599 

8.6 14.0 18.8 22.5 24.6 24.8 23.4 20.8 17.4 13.9 10.9 8.7 7.0 5.5 3.3 0.2 -4.1 -9.2 -14.6 

0 38624 39000 39258 39390 39393 39274 39048 38735 38353 37923 37466 37005 36562 36157 35802 35497 35228 34969 34695 

17.4 21.0 24.1 26.0 26.1 24.0 20.0 14.4 8.3 2.5 -1.9 -4.5 -5.6 -5.8 -6.0 -7.0 -9.0 -12.2 -16.2 
II.) 

• 

LONG 

LAT 

90 

IGRF 1980 HORIZONTAL INTENSITY (H) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 

-18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 

85 1736 1703 1654 1590 1512 1424 1327 1227 1133 1053 1001 990 1029 1119 1252 1420 1612 1820 2039 

-6.7 -6.9 -7.3 -7.9 -8.7 -9.7 -11.1 -12.7 -14.6 -16.7 -18.5 -19.7 -20.0 -19.2 -17.9 -16.5 -15.1 -14.0 -13.0 

80 4828 4770 4665 4514 4319 4080 3801 3483 3130 2745 2332 1897 1449 1005 622 519 823 1271 1750 

75 

1.1 0.6 0.1 -0.5 -1.0 -1.6 -2.3 -3.0 -3.7 -4.6 -5.6 -7.1 -9.2 -12.8 -19.6 -21.8 -12.2 -7.0 -4.4 

8439 8339 8172 7937 7637 7273 6847 6362 5820 5225 4582 3898 3178 2431 1670 

-0.9 -1.5 -2.0 -2.5 -3.1 -3.6 -4.1 -4.5 -4.9 -5.2 -5.3 -5.3 -4.9 -4.0 -1.9 

919 381 840 1577 

4.2 28.5 22.1 16.5 

70 12079 11935 11713 11413 11036 10580 10047 9437 8753 7999 7181 6310 5398 4465 3544 2697 2064 1893 2280 

-3.8 -4.1 -4.5 -4.9 -5.3 -5.7 -6.1 -6.4 -6.5 -6.3 -5.7 -4.6 -2.7 0.3 5.4 13.9 27.3 39.6 40.8 

65 15484 15305 15050 14719 14309 13816 13239 12574 11823 10989 10079 9107 8091 7061 6059 5155 4452 4085 4150 

-5.6 -5.6 -5.6 -5.8 -6.1 -6.5 -6.8 -7.0 -6.8 -6.2 -4.9 -2.8 0.3 4.9 11.4 20.3 31.7 43.2 50.8 

60 18458 18253 17989 17664 17272 16804 16254 15616 14886 14067 13165 12193 11172 10133 9119 8194 7441 6955 6815 

-5.9 -5.4 -5.1 -5.1 -5.3 -5.7 -6.1 -6.3 -6.0 -5.1 -3.3 -0.5 3.4 8.7 15.6 24.3 34.7 45.5 54.9 

55 20886 20660 20404 20114 19779 19388 18928 18388 17762 17047 16245 15368 14432 13464 12501 11597 10821 10252 9964 

-4.9 -3.9 -3.3 -3.2 -3.5 -4.1 -4.7 -5.1 -4.9 -4.0 -2.1 0.8 4.7 9.8 16.3 24.2 33.6 44.0 54.1 

50 22751 22501 22257 22013 21757 21473 21143 20752 20286 19738 19107 18395 17613 16780 15924 15088 14329 13717 13324 

-3.4 -2.2 -1.5 -1.4 -1.8 -2.6 -3.5 -4.1 -4.2 -3.6 -2.1 0.1 3.2 7.1 12.1 18.6 26.7 36.5 47.0 

45 24128 23844 23604 23404 23228 23059 22873 22649 22370 22020 21594 21087 20503 19850 19145 18421 17722 17110 16656 

-2.2 -1.2 -o.5 -o.5 -1.0 -2.0 -3.0 -3.9 -4.3 -4.3 -3.7 -2.8 -1.6 0.2 3.o 7.3 13.7 22.4 33.0 

40 25161 24834 24586 24415 24307 24240 24189 24127 24028 23877 23659 23367 22995 22542 22016 21434 20832 20259 19782 

-2.0 -1.5 -1.2 -1.3 -1.8 -2.7 -3.7 -4.6 -5.3 -5.9 -6.7 -7.6 -8.9 -9.9 -10.1 -8.6 -4.5 2.8 12.8 

35 26033 25659 25392 25234 25172 25185 25243 25314 25370 25391 25359 25264 25092 24836 24491 24063 23573 23063 22588 

-2.9 -3.3 -3.6 -3.8 -4.3 -4.8 -5.4 -6.1 -6.9 -8.3 -10.5 -13.7 -17.8 -22.1 -25.6 -27.1 -25.6 -20.3 -11.3 

30 26923 26508 26217 26057 26018 26080 26210 26374 26543 26692 26805 26868 26863 26776 26590 26302 25921 25474 25011 

-4.6 -6.3 -7.3 -7.9 -8.1 -8.2 -8.2 -8.4 -9.3 -11.3 -14.9 -20.3 -27.2 -34.6 -41.3 -45.7 -46.7 -43.6 -36.3 

25 27965 27526 27214 27039 27000 27075 27234 27443 27670 27894 28098 28265 28378 28413 28348 28167 27870 27473 27017 

-6.8 -9.8 -11.7 -12.7 -12.9 -12.6 -12.1 -11.9 -12.7 -15.3 -20.1 -27.4 -36.5 -46.3 -55.2 -61.8 -64.9 -63.8 -58.5 

20 29223 28781 28453 28256 28191 28242 28382 28580 28808 29045 29278 29490 29661 29763 29769 29654 29408 29042 28586 

-8.9 -13.2 -16.2 -17.7 -18.1 -17.7 -16.9 -16.6 -17.5 -20.6 -26.3 -34.7 -44.9 -55.7 -65.7 -73.4 -77.8 -78.3 -74.9 

15 30669 30245 29909 29679 29564 29554 29628 29761 29930 30120 30319 30513 30681 30795 30823 30734 30514 30162 29705 

-11.0 -16.2 -20.0 -22.3 -23.3 -23.2 -22.7 -22.7 -24.0 -27.4 -33.3 -41.7 -51.7 -62.1 -71.6 -79.1 -83.8 -85.2 -83.6 

10 32187 31797 31458 31190 31005 30902 30870 30891 30951 31040 31150 31270 31383 31460 31469 31379 31166 30825 30373 

-12.9 -18.4 -22.9 -26.0 -27.8 -28.6 -29.0 -29.6 -31.4 -34.9 -40.3 -47.6 -56.0 -64.5 -72.2 -78.3 -82.4 -84.2 -83.9 

5 33599 33250 32912 32602 32337 32125 31964 31847 31767 31720 31702 31708 31724 31730 31693 31583 31372 31044 30607 

-14.6 -19.9 -24.6 -28.5 -31.3 -33.2 -34.8 -36.4 -38.6 -41.7 -45.8 -51.0 -56.6 -62.2 -67.3 -71.4 -74.5 -76.3 -77.0 

0 34695 34390 34058 33712 33373 33056 32768 32513 32289 32097 31937 31810 31711 31625 31527 31387 31173 30861 30448 

-16.2 -20.7 -25.3 -29.5 -33.2 -36.4 -39.1 -41.5 -43.7 -45.9 -48.2 -50.5 -52.9 -55.2 -57.4 -59.6 -61.7 -63.6 -65.1 
...., 

c.n 

LONG 

LAT 

90 

85 

IGRF 1980 HORIZONTAL INTENSITY (H) 

-90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 2331 

-18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 -18.3 

2039 2263 2489 2714 2935 3150 3357 3554 3740 3915 4076 4224 4357 4474 4576 4662 4732 4785 4820 

-13.0 -12.2 -11.6 -11.1 -10.7 -10.5 -10.3 -10.2 -10.2 -10.2 -10.4 -10.5 -10.8 -11.0 -11.4 -11.7 -12.1 -12.6 -13.0 

80 1750 2234 2711 3174 3620 4044 4445 4820 5167 5487 5778 6040 6273 6477 6654 6802 6924 7018 7086 

-4.4 -3.0 -2.2 -1.6 -1.4 -1.3 -1.3 -1.4 -1.6 -1.9 -2.3 -2.8 -3.3 -3.9 -4.6 -5.3 -6.0 -6.9 -7.8 

75 1577 2324 3053 3753 4417 5040 5619 6151 6635 7072 7462 7806 8107 8366 8587 8771 8921 9039 9126 

16.5 14.2 12.9 12.0 11.2 10.5 9.8 9.1 8.3 7.5 6.7 5.8 4.9 3.9 2.9 1.8 o.7 -0.5 -1.7 

70 2280 2994 3824 4676 5506 6291 7018 7681 8276 8803 9264 9662 10001 10286 10522 10715 10869 10987 11075 

40.8 36.8 32.9 29.7 27.2 25.0 23.1 21.3 19.5 17.9 16.3 14.7 13.2 11.7 10.3 8.8 7.3 5.8 4.3 

65 4150 4610 5332 6185 7078 7953 8777 9530 10202 10788 11290 11713 12064 12350 12578 12757 12894 12994 13064 

50.8 52.6 50.8 47.6 44.1 40.6 37.3 34.1 31.1 28.3 25.6 23.2 20.9 18.7 16.7 14.7 12.8 11.0 9.1 

60 6815 7041 7578 8326 9185 10074 10934 11728 12436 13047 13562 13986 14326 14595 14802 14956 15066 15140 15185 

54.9 60.7 62.5 61.4 58.5 54.7 50.4 46.0 41.7 37.6 33.8 30.3 27.2 24.3 21.7 19.3 17.0 14.8 12.6 

55 9964 10000 10348 10950 11716 12559 13403 14195 14902 15509 16012 16419 16739 16985 17169 17301 17391 17446 17472 

54.1 62.3 67.5 69.2 68.1 64.9 60.4 55.4 50.1 45.0 40.3 36.0 32.2 28.8 25.7 23.0 20.3 17.8 15.2 

50 13324 13207 13385 13829 14472 15229 16018 16773 17453 18035 18516 18902 19206 19440 19617 19747 19836 19892 19920 

47.0 57.1 65.1 69.8 71.2 69.6 66.0 61.1 55.6 50.2 45.1 40.5 36.4 32.9 29.7 26.7 23.9 21.1 18.1 

45 16656 16424 16453 16742 17245 17890 18596 19290 19926 20478 20940 21320 21629 21879 22079 22235 22352 22435 22490 

33.0 44.4 54.7 62.5 66.8 67.7 65.9 62.3 57.8 53.0 48.5 44.4 40.7 37.4 34.4 31.6 28.8 25.8 22.5 

40 19782 19468 19370 19508 19862 20377 20979 21600 22188 22717 23180 23582 23930 24232 24490 24705 24878 25012 25114 

12.8 24.8 36.9 47.3 54.8 58.8 59.8 58.7 56.3 53.4 50.4 47.5 44.9 42.4 40.1 37.7 35.1 32.2 28.8 

35 22588 22215 22007 22001 22203 22577 23066 23608 24155 24677 25166 25621 26043 26430 26776 27073 27321 27521 27683 

-11.3 0.4 13.4 25.8 36.1 43.6 48.2 50.5 51.2 51.0 50.3 49.3 48.2 46.9 45.5 43.8 41.8 39.3 36.2 

30 25011 24593 24287 24147 24198 24432 24808 25275 25789 26319 26851 27378 27890 28374 28816 29202 29527 29798 30027 

-36.3 -25.6 -12.8 0.6 13.1 23.8 32.2 38.4 42.8 45.7 47.6 48.6 49.0 49.0 48.6 47.9 46.8 45.1 42.5 

25 27017 26559 26168 25908 25823 25926 26196 26595 27081 27620 28192 28780 29364 29924 30438 30892 31281 31616 31913 

-58.5 -49.6 -37.9 -24.7 -11.1 2.1 13.9 23.8 31.6 37.4 41.3 43.8 45.3 46.3 46.9 47.2 47.2 46.6 45.1 

20 28586 28094 27633 27274 27075 27065 27241 27573 28023 28553 29132 29735 30336 30911 31440 31914 32337 32721 33084 

-74.9 -68.2 -58.5 -46.6 -33.0 -18.6 -4.4 8.3 18.6 26.0 30.9 33.9 35.7 37.0 38.2 39.5 40.7 41.5 41.4 

15 29705 29189 28679 28247 27960 27857 27947 28208 28600 29079 29607 30151 30684 31185 31648 32077 32488 32896 33317 

-83.6 -79.0 -71.8 -62.0 -49.7 -35.5 -20.5 -6.7 4.5 12.2 16.6 18.6 19.6 20.5 22.0 24.1 26.5 28.6 29.9 

10 30373 29848 29311 28833 28481 28302 28309 28483 28782 29158 29565 29966 30339 30675 30987 31301 31647 32044 32497 

-83.9 -81.4 -76.8 -69.7 -59.6 -47.0 -33.0 -19.8 -9.5 -3.3 -0.9 -1.0 -1.8 -1.9 -0.6 2.0 5.2 8.4 10.8 

5 30607 30091 29546 29041 28639 28389 28308 28375 28546 28769 28993 29183 29325 29427 29524 29665 29893 30231 30671 

-77.0 -76.3 -74.2 -69.8 -62.7 -52.7 -41.2 -30.3 -22.6 -19.2 -19.9 -23.0 -26.1 -27.6 -26.8 -24.1 -20.4 -16.7 -13.6 

0 30448 29949 29408 28882 28434 28112 27932 27874 27892 27930 27937 27884 27764 27606 27461 27396 27464 27688 28051 

-65.1 -66.0 -66.0 -64.3 -60.3 -53.7 -45.6 -38.2 -34.0 -34.3 -38.4 -44.5 -49.9 -52.8 -52.7 -50.2 -46.6 -43.0 -40.0 
....., 

0.. 

LONG 

LAT 

0 5 10 15 

IGRF 1980 

20 25 30 35 

HORIZONTAL INTENSITY (H) 

40 45 50 55 60 65 70 75 80 85 90 

0 28051 28505 28995 29473 29918 30334 30743 31176 31662 32225 32881 33626 34437 35275 36096 36863 37548 38137 38624 

-40.0 -37.9 -36.7 -36.2 -36.0 -36.0 -35.8 -35.1 -33.5 -30.5 -26.1 -20.8 -14.8 -8.5 -2.3 3.5 8.7 13.3 17.4 

-5 24967 25278 25630 25983 26328 26684 27086 27566 28148 28845 29657 30564 31527 32499 33435 34300 35081 35775 36385 

-64.6 -62.9 -61.4 -59.4 -56.8 -53.5 -49.8 -45.5 -40.2 -33.5 -25.5 -16.7 -7.6 1.0 8.5 14.6 19.0 21.8 23.6 

-10 21789 21885 22029 22197 22401 22676 23061 23587 24267 25100 26068 27133 28239 29331 30362 31307 32162 32939 33655 

-84.1 -83.3 -81.6 -78.2 -72.9 -66.2 -58.7 -50.6 -41.7 -31.6 -20.5 -9.1 1.8 11.4 19.1 24.3 27.0 27.3 26.1 

-15 18838 18690 18597 18563 18622 18818 19193 19767 20541 21499 22603 23795 25005 26169 27243 28212 29084 29885 30647 

-96.9 -97.0 -95.1 -90.3 -82.4 -72.3 -61.1 -49.5 -37.4 -24.6 -11.5 1.0 12.2 21.2 27.5 30.9 31.1 28.6 24.2 

-20 16337 15969 15671 15473 15423 15574 15959 16589 17452 18512 19712 20975 22220 23380 24418 25327 26129 26865 27582 

-103.0-103.4-101.2 -94.9 -84.7 -71.8 -57.7 -43.2 -28.5 -13.9 -0.2 11.7 21.3 28.0 31.8 32.5 30.1 24.9 17.7 

-25 14398 13889 13470 13189 13105 13265 13695 14393 15332 16459 17698 18959 20155 21223 22134 22891 23527 24097 24661 

-103.7-103.7-100.4 -92.8 -80.9 -66.1 -5o.o -33.5 -17.4 -2.4 10.3 20.0 26.5 29.8 30.2 28.0 23.3 16.2 7.3 

-30 13065 12516 12083 11821 11786 12014 12520 13289 14281 15427 16638 17820 18889 19789 20499 21029 21419 21732 22041 

-100.9 -99.5 -94.8 -85.8 -72.9 -57.2 -40.2 -23.1 -7.1 6.7 17.0 23.3 25.9 25.3 22.4 17.7 11.5 3.6 -5.5 

-35 12348 11854 11501 11341 11414 11746 12336 13158 14159 15265 16383 17424 18313 19002 19473 19738 19839 19839 19818 

-40 

-96.0 -92.8 -86.3 -76.2 -62.9 -47.3 -30.8 -14.7 -0.3 11.0 18.1 20.8 19.6 15.7 10.2 3.8 -2.9 -10.2 -18.2 

12247 11869 11650 11626 11823 12252 12898 13727 14683 15689 16664 17526 18212 18679 18911 18917 18730 18408 18028 

-89.8 -84.7 -76.7 -66.1 -53.0 -38.6 -23.7 -9.8 1.9 10.1 14.0 13.7 9.9 3.9 -3.1 -9.9 -16.2 -22.1 -27.9 

-45 12736 12492 12408 12506 12797 13277 13926 14703 15555 16414 17210 17876 18358 18617 18637 18418 17984 17377 16662 

-82.6 -75.9 -67.2 -56.6 -44.6 -31.9 -19.5 -8.4 0.3 5.6 7.1 s.o o.o -6.5 -13.4 -19.6 -24.6 -28.5 -31.7 

-50 13735 13602 13616 13787 14113 14583 15170 15839 16540 17219 17819 18285 18574 18651 18496 18104 17485 16665 15690 

-74.2 -66.7 -57.8 -48.0 -37.5 -27.0 -17.2 -8.9 -2.9 0.2 0.3 -2.3 -6.9 -12.5 -18.1 -22.7 -25.8 -27.5 -28.3 

-55 15092 15026 15085 15267 15565 15964 16438 16955 17476 17959 18359 18634 18747 18670 18382 17872 17140 16200 15076 

-64.5 -56.9 -48.6 -39.9 -31.1 -22.8 -15.4 -9.4 -5.3 -3.4 -3.6 -5.6 -8.9 -12.7 -16.2 -18.7 -19.9 -19.6 -18.4 

-60 16589 16547 16600 16742 16964 17250 17578 17923 18255 18541 18750 18850 18811 18610 18228 17654 16881 15915 14766 

-53.6 -46.5 -39.2 -31.8 -24.7 -18.3 -12.1 -8.3 -s.3 -3.7 -3.5 -4.4 -s.9 -7.6 -9.o -9.6 -9.1 -7.5 -s.o 

-65 17974 17925 17940 18014 18135 18291 18465 18639 18791 18897 18936 18885 18722 18431 17995 17406 16657 15748 14686 

-41.9 -35.8 -29.6 -23.7 -18.1 -13.0 -8.7 -5.2 -2.6 -0.9 o.o 0.4 0.4 0.4 0.7 1.5 3.0 5.2 8.0 

-70 18992 18926 18895 18894 18915 18949 18984 19008 19007 18965 18868 18702 18452 18109 17661 17103 16431 15645 14749 

-30.0 -25.2 -20.4 -15.8 -11.4 -7.5 -4.0 -1.0 1.4 3.4 s.o 6.2 7.3 8.4 9.6 11.1 12.9 15.0 17.3 

-75 19428 19348 19280 19220 19163 19103 19034 18948 18838 18695 18511 18279 17991 17643 17229 16746 16195 15577 14895 

-18.9 -15.5 -12.0 -8.7 -5.4 -2.4 0.4 2.9 5.1 7.1 8.9 10.6 12.1 13.6 15.1 16.6 18.1 19.8 21.5 

-80 19129 19051 18968 18878 18780 18672 18550 18412 18254 18074 17868 17634 17370 17074 16745 16384 15992 15570 15122 

-9.2 -7.1 -4.9 -2.8 -0.7 1.4 3.4 5.3 7.0 8.7 10.3 11.8 13.2 14.5 15.8 17.0 18.1 19.2 20.3 

-85 18028 17972 17906 17831 17746 17652 17547 17432 17306 17170 17022 16864 16695 16516 16327 16130 15926 15717 15503 

-0.9 o.o 1.0 2.0 3.0 4.1 5.1 6.1 7.1 8.0 8.9 9.8 10.7 11.5 12.2 12.9 13.6 14.2 14.8 

-90 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 

6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 
to.) 

..... 

LONG 

LAT 

90 95 100 105 

IGRF 1980 

110 115 120 125 

HORIZONTAL INTENSITY (H) 

130 135 140 145 150 155 160 165 170 175 180 

0 38624 39000 39258 39390 39393 39274 39048 38735 38353 37923 37466 37005 36562 36157 35802 35497 35228 34969 34695 

17.4 21.0 24.1 26.0 26.1 24.0 20.0 14.4 8.3 2.5 -1.9 -4.5 -5.6 -5.8 -6.0 -7.0 -9.0 -12.2 -16.2 

-5 36385 36912 37347 37673 37878 37957 37920 37786 37578 37322 37039 36750 36473 36221 36003 35818 35654 35484 35280 

23.6 24.8 25.4 25.2 23.5 19.7 13.9 6.6 -1.2 -8.3 -13.5 -16.3 -17.0 -16.1 -14.8 -13.9 -13.9 -15.1 -17.5 

-10 33655 34317 34917 35434 35840 36119 36271 36314 36272 36176 36052 35921 35794 35682 35590 35515 35445 35356 35221 

26.1 24.2 22.1 19.6 16.3 11.6 5.3 -2.3 -10.2 -17.2 -22.3 -24.9 -25.1 -23.7 -21.4 -19.3 -17.9 -17.5 -18.4 

-15 30647 31387 32103 32766 33338 33789 34107 34304 34406 34447 34457 34458 34462 34474 34495 34521 34540 34532 34469 

24.2 19.1 14.1 9.5 5.1 0.2 -5.5 -11.9 -18.3 -23.9 -27.7 -29.5 -29.3 -27.5 -25.0 -22.4 -20.3 -19.0 -18.7 

-20 27582 28310 29053 29783 30455 31023 31466 31784 32001 32153 32272 32383 32497 32618 32743 32867 32977 33055 33078 

17.7 9.8 2.4 -3.9 -9.1 -13.5 -17.7 -21.8 -25.6 -28.7 -30.5 -30.8 -29.9 -28.0 -25.7 -23.2 -21.0 -19.4 -18.6 

-25 24661 25265 25925 26619 27300 27915 28427 28828 29134 29376 29587 29792 30004 30224 30450 30673 30880 31055 31178 

7.3 -2.2 -11.2 -18.6 -24.0 -27.8 -30.2 -31.7 -32.4 -32.5 -31.8 -30.5 -28.7 -26.6 -24.5 -22.4 -20.6 -19.1 -18.2 

-30 22041 22407 22866 23410 23998 24577 25100 25546 25919 26240 26537 26833 27139 27457 27784 28110 28423 28706 28941 

-5.5 -15.2 -24.4 -32.1 -37.5 -40.5 -41.4 -40.7 -38.8 -36.2 -33.2 -30.2 -27.4 -24.9 -22.9 -21.1 -19.7 -18.6 -17.9 

-35 19818 19853 20001 20281 20671 21127 21597 22049 22469 22866 23254 23647 24055 24478 24912 25347 25771 26170 26526 

-40 

-18.2 -26.6 -34.9 -42.0 -47.2 -49.9 -50.1 -48.2 -44.8 -40.4 -35.8 -31.5 -27.7 -24.6 -22.2 -20.4 -19.0 -18.1 -17.7 

18028 17675 17430 17344 17431 17668 18012 18422 18867 19334 19820 20325 20849 21390 21941 22494 23036 23553 24030 

-27.9 -33.9 -40.3 -46.4 -51.4 -54.4 -55.0 -53.3 -49.8 -45.1 -39.8 -34.6 -30.0 -26.1 -23.0 -20.6 -18.9 -17.9 -17.6 

-45 16662 15920 15244 14717 14397 14305 14427 14724 15151 15670 16253 16881 17538 18213 18897 19576 20241 20877 21471 

-31.7 -35.0 -39.0 -43.7 -48.7 -52.8 -55.2 -55.3 -53.2 -49.4 -44.5 -39.1 -33.8 -29.0 -24.8 -21.5 -19.0 -17.5 -17.1 

-50 15690 14624 13549 12559 11750 11201 10958 11019 11342 11865 12528 13279 14080 14904 15731 16548 17340 18095 18804 

-28.3 -28.9 -30.4 -33.4 -38.2 -44.1 -49.6 -53.3 -54.2 -52.5 -48.6 -43.3 -37.5 -31.7 -26.4 -21.9 -18.4 -16.2 -15.3 

-55 15076 13808 12454 11085 9793 8686 7882 7479 7512 7928 8620 9482 10432 11415 12397 13357 14281 15158 15982 

-18.4 -16.8 -15.8 -16.5 -19.9 -26.5 -35.7 -45.0 -51.5 -53.2 -50.7 -45.5 -39.0 -32.1 -25.7 -20.1 -15.7 -12.8 -11.4 

-60 14766 13456 12014 10480 8903 7347 5900 4705 3985 3956 4560 5530 6651 7812 8960 10068 11124 12121 13058 

-5.0 -2.0 o.8 2.6 2.6 -0.5 -8.o -21.3 -38.5 -50.2 -50.1 -43.4 -35.0 -26.9 -19.7 -13.7 -9.0 -5.8 -4.2 

-65 14686 13480 12148 10710 9188 7610 5999 4381 2778 1221 467 1858 3264 4611 5891 7105 8251 9334 10355 

8.0 11.2 14.5 17.6 20.1 21.8 22.2 21.1 18.0 9.3 -41.2 -19.5 -12.3 -6.9 -2.3 1.5 4.4 6.2 6.9 

-70 14749 13752 12664 11501 10281 9026 7764 6526 5361 4340 3587 3264 3458 4057 4881 5805 6765 7727 8676 

17.3 19.9 22.6 25.3 27.9 30.2 32.4 34.6 36.9 39.5 41.6 41.0 36.4 30.9 26.9 24.4 22.7 21.4 19.9 

-75 14895 14156 13370 12546 11701 10851 10017 9222 8492 7859 7353 7004 6833 6846 7033 7370 7827 8374 8987 

21.5 23.2 24.9 26.5 28.1 29.6 30.9 32.0 33.0 33.7 34.2 34.4 34.1 33.3 32.2 30.7 29.0 27.2 25.3 

-80 15122 ·14653 14168 13675 13181 12695 12227 11787 11387 11036 10744 10519 10368 10294 10299 10380 10535 10755 11036 

20.3 21.3 22.2 23.1 23.8 24.5 25.0 25.5 25.8 26.0 26.0 25.9 25.7 25.2 24.7 23.9 23.1 22.0 20.8 

-85 15503 15287 15072 14860 14654 14455 14269 14096 13940 13803 13688 13596 13530 13490 13477 13491 13532 13600 13692 

14.8 15.3 15.7 16.1 16.4 16.6 16.8 16.9 17.0 17.0 16.9 16.7 16.5 16.2 15.8 15.4 14.8 14.3 13.6 

-90 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 

6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 
...., 

co 

LONG 

LAT 

IGR F 1980 HORIZONTAL INTENSITY (H) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

0 34695 34390 34058 33712 33373 33056 32768 32513 32289 32097 31937 31810 31711 31625 31527 31387 31173 30861 30448 

-16.2 -20.7 -25.3 -29.5 -33.2 -36.4 -39.1 -41.5 -43.7 -45.9 -48.2 -50.5 -52.9 -55.2 -57.4 -59.6 -61.7 -63.6 -65.1 

-5 35280 35022 34706 34343 33954 33560 33176 32812 32471 32155 31867 31615 31399 31216 31049 30870 30645 30345 29951 

-17.5 -20.8 -24.8 -29.1 -33.3 -37.3 -40.9 -43.6 -45.4 -46.1 -46.1 -45.5 -44.6 -44.0 -43.9 -44.8 -46.5 -48.8 -51.2 

-10 35221 35015 34733 34381 33982 33560 33133 32713 32305 31910 31534 31184 30872 30600 30360 30131 29882 29576 29187 

-18.4 -20.5 -23.5 -27.4 -31.7 -35.9 -39.6 -42.1 -42.9 -41.9 -39.5 -36.2 -32.8 -30.2 -28.9 -29.5 -31.6 -34.8 -38.5 

-15 34469 34331 34106 33804 33444 33049 32640 32228 31815 31400 30987 30584 30205 29861 29552 29265 28973 28639 28233 

-18.7 -19.7 -21.8 -25.0 -28.8 -32.7 -35.8 -37.4 -37.0 -34.3 -30.0 -24.7 -19.8 -16.3 -15.0 -16.3 -19.6 -24.2 -29.3 

-20 33078 33024 32887 32672 32396 32082 31747 31400 31040 30661 30264 29854 29446 29054 28688 28342 27995 27618 27178 

-18.6 -18.8 -20.2 -22.5 -25.6 -28.6 -30.9 -31.4 -29.7 -25.7 -20.1 -13.9 -8.6 -5.4 -5.0 -7.5 -12.4 -18.6 -25.0 

-25 31178 31230 31205 31106 30950 30754 30533 30291 30024 29723 29383 29008 28610 28204 27804 27414 27021 26602 26128 

-18.2 -18.1 -19.0 -20.7 -23.0 -25.3 -26.6 -26.2 -23.6 -19.0 -13.0 -6.9 -2.1 0.2 -0.7 -4.6 -10.9 -18.3 -25.8 

-30 28941 29114 29217 29254 29235 29175 29084 28964 28808 28608 28354 28048 27697 27318 26925 26527 26118 25681 25194 

-17.9 -17.8 -18.6 -20.1 -22.0 -23.7 -24.5 -23.7 -21.0 -16.5 -11.0 -5.7 -1.9 -0.8 -2.8 -7.8 -14.8 -22.7 -30.5 

-35 26526 26826 27063 27237 27357 27431 27469 27470 27429 27338 27188 26978 26714 26409 26076 25724 25350 24942 24480 

-40 

-17.7 -18.0 -18.9 -20.6 -22.5 -24.2 -25.1 -24.6 -22.5 -18.9 -14.6 -10.6 -8.0 -7.8 -10.4 -15.4 -22.2 -29.7 -37.2 

24030 24455 24820 25125 25373 25571 25727 25842 25913 25936 25905 25819 25681 25500 25285 25039 24758 24431 24041 

-17.6 -18.1 -19.5 -21.5 -23.9 -26.2 -27.7 -28.1 -27.1 -25.0 -22.2 -19.6 -18.0 -18.3 -20.7 -25.0 -30.7 -37.2 -43.7 

-45 21471 22014 22498 22920 23285 23598 23864 24090 24277 24424 24530 24595 24620 24607 24557 24468 24331 24132 23855 

-17.1 -17.7 -19.4 -21.9 -24.9 -27.8 -30.3 -31.9 -32.3 -31.7 -30.5 -29.1 -28.3 -28.7 -30.4 -33.6 -37.9 -43.0 -48.4 

-so 18804 19458 2oos3 20586 21062 21487 21869 2221s 22531 22820 23085 23324 23536 23717 23860 23955 23988 23944 23807 

-15.3 -15.8 -17.5 -20.3 -23.7 -27.3 -30.6 -33.2 -34.9 -35.7 -35.7 -35.4 -35.2 -35.5 -36.7 -38.8 -41.9 -45.7 -50.2 

-55 15982 16746 17450 18096 18689 19236 19747 20231 20695 21144 21581 22004 22406 22780 23111 23387 23589 23703 23714 

-11.4 -11.5 -13.0 -15.7 -19.1 -22.9 -26.6 -29.9 -32.4 -34.2 -35.2 -35.8 -36.2 -36.7 -37.7 -39.4 -41.8 -45.0 -48.7 

-60 13058 13934 14751 15516 16234 16915 17568 18201 18822 19433 20035 20624 21191 21725 22212 22635 22980 23231 23378 

-4.2 -4.1 -5.3 -7.7 -10.8 -14.4 -18.0 -21.5 -24.4 -26.8 -28.6 -30.0 -31.2 -32.4 -33.8 -35.6 -38.0 -40.9 -44.4 

-65 10355 11320 12234 13104 13936 14739 15520 16283 17034 17773 18497 19200 19875 20510 21093 21610 22049 22399 22653 

6.9 6.6 5.2 3.0 0.2 -3.1 -6.4 -9.8 -12.9 -15.7 -18.1 -20.3 -22.3 -24.3 -26.5 -28.8 -31.5 -34.5 -37.8 

-70 8676 9606 10512 11396 12260 13105 13934 14748 15546 16327 17086 17819 18517 19172 19776 20320 20794 21192 21510 

19.9 18.1 16.0 13.5 10.7 7.7 4.6 1.4 -1.7 -4.6 -7.5 -10.2 -12.8 -15.5 -18.1 -20.9 -23.8 -26.8 -29.9 

-75 8987 9645 10334 11041 11760 12483 13206 13923 14632 15326 16002 16653 17274 17859 18403 18899 19343 19732 20062 

25.3 23.2 21.0 18.6 16.1 13.5 10.8 8.1 s.3 2.6 -0.1 -2.8 -s.s -8.1 -10.8 -13.4 -16.1 -18.7 -21.3 

-80 11036 11367 11742 12153 12591 13051 13525 14009 14495 14979 15457 15922 16372 16802 17207 17586 17935 18251 18533 

20.8 19.5 18.0 16.4 14.7 13.0 11.1 9.2 7.2 5.2 3.2 1.2 -0.9 -2.9 -4.9 -6.8 -8.7 -10.6 -12.4 

-85 13692 13808 13946 14103 14278 14467 14669 14880 15098 15322 15547 15772 15994 16212 16424 16628 16822 17005 17176 

13.6 12.9 12.1 11.3 10.4 9.5 8.6 7.6 6.6 5.6 4.6 3.5 2.5 1.5 o.s -0.4 -1.3 -2.2 -3.0 

-90 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 

6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 
to.,) 

"0 

IGRF 1980 HORIZONTAL INTENSITY (H) 

LONG -90 -85 -80 -75 -70 -65 -60 -55 -so -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

LAT 

0 30448 29949 29408 28882 28434 28112 27932 27874 27892 27930 27937 27884 27764 27606 27461 27396 27464 27688 28051 

-65.1 -66.0 -66.0 -64.3 -60.3 -53.7 -45.6 -38.2 -34.0 -34.3 -38.4 -44.5 -49.9 -52.8 -52.7 -50.2 -46.6 -43.0 -40.0 

-5 29951 29469 28928 28380 27882 27481 27194 27002 26859 26708 26501 26214 25852 25454 25082 24810 24695 24755 24967 

-51.2 -53.6 -55.4 -56.1 -54.9 -51.6 -47.2 -43.8 -43.4 -47.2 -54.5 -63.0 -70.1 -74.1 -74.6 -72.6 -69.6 -66.7 -64.6 

-10 29187 28707 28157 27577 27022 26538 26144 25824 25532 25216 24830 24356 23806 23224 22673 22223 21922 21785 21789 

-38.5 -42.1 -45.5 -48.0 -49.1 -48.8 -47.7 -47.8 -50.7 -57.3 -66.7 -76.6 -84.6 -89.1 -90.0 -88.6 -86.6 -85.0 -84.1 

-15 28233 27738 27164 26546 25932 25368 24876 24446 24035 23594 23082 22485 21817 21121 20452 19866 19401 19064 18838 

-29.3 -34.2 -38.7 -42.6 -45.4 -47.1 -48.5 -51.0 -56.0 -64.2 -74.4 -84.6 -92.6 -97.1 -98.3 -97.6 -96.6 -96.5 -96.9 

-20 27178 26656 26052 25394 24727 24096 23525 23008 22512 21989 21404 20744 20022 19273 18541 17867 17274 16768 16337 

-25.0 -31.0 -36.5 -41.1 -44.8 -47.7 -50.4 -54.1 -60.0 -68.4 -78.3 -87.8 -95.1 -99.3-100.7-100.7-100.7-101.6-103.0 

-25 26128 25578 24950 24263 23558 22877 22247 21668 21113 20540 19919 19236 18502 17741 16986 16265 15591 14968 14398 

-25.8 -32.6 -38.5 -43.5 -47.6 -50.9 -54.0 -57.8 -63.4 -71.0 -79.6 -87.8 -94.1 -97.9 -99.6-100.2-100.9-102.3-103.7 

-30 25194 24636 24002 23307 22585 21874 21204 20578 19977 19370 18728 18039 17309 16557 15803 15066 14358 13687 13065 

-30.5 -37.5 -43.6 -48.7 -52.8 -56.0 -58.9 -62.3 -66.9 -73.1 -80.0 -86.7 -92.0 -95.4 -97.2 -98.2 -99.2-100.3-100.9 

-35 24480 23947 23336 22659 21943 21223 20526 19862 19219 18576 17911 17216 16491 15752 15013 14289 13593 12939 12348 

-40 

-37.2 -44.0 -50.0 -55.0 -58.9 -62.0 -64.6 -67.4 -70.9 -75.6 -80.9 -86.1 -90.4 -93.4 -95.2 -96.2 -96.9 -97.0 -9~.0 

24041 23572 23018 22388 21704 20996 20288 19593 18910 18228 17534 16823 16100 15375 14661 13974 13330 12745 12247 

-43.7 -so.o -ss.6 -60.4 -64.4 -67.4 -7o.o -72.4 -75.3 -78.8 -82.9 -86.9 -90.2 -92.6 -94.0 -94.5 -94.2 -92.8 -89.8 

-45 23855 23486 23022 22469 21844 21172 20475 19767 19055 18340 17619 16896 16176 15471 14796 14167 13599 13115 12736 

-48.4 -53.9 -59.1 -63.8 -67.8 -71.1 -73.9 -76.5 -79.1 -82.1 -85.3 -88.3 -90.7 -92.3 -92.8 -92.3 -90.5 -87.4 -82.6 

-50 23807 23566 23218 22769 22232 21625 20969 20280 19571 18851 18127 17410 16710 16042 15421 14862 14383 14001 13735 

-50.2 -54.9 -59.7 -64.2 -68.4 -72.1 -75.4 -78.3 -81.2 -83.9 -86.5 -88.7 -90.2 -90.7 -90.1 -88.2 -84.9 -80.3 -74.2 

-55 23714 23613 23399 23074 22651 22143 21568 20943 20284 19605 18922 18250 17602 16995 16445 15966 15572 15277 15092 

-48.7 -52.9 -57.3 -61.8 -66.0 -70.0 -73.7 -77.0 -80.0 -82.6 -84.7 -86.1 -86.6 -86.1 -84.3 -81.2 -76.8 -71.2 -64.5 

-60 23378 23413 23335 23148 22858 22480 22026 21513 20957 20377 19788 19207 18650 18134 17671 17276 16958 16727 16589 

-44.4 -48.2 -52.3 -56.6 -60.7 -64.7 -68.5 -71.8 -74.6 -76.9 -78.5 -79.1 -78.8 -77.3 -74.7 -70.9 -66.0 -60.2 -53.6 

-65 22653 22804 22853 22801 22655 22425 22122 21759 21353 20917 20468 20021 19590 19189 18830 18522 18274 18090 17974 

-37.8 -41.4 -45.2 -49.0 -52.8 -56.4 -59.8 -62.7 -65.0 -66.7 -67.6 -67.6 -66.6 -64.6 -61.7 -57.8 -53.1 -47.7 -41.9 

-70 21510 21743 21893 21960 21949 21868 21724 21528 21290 21023 20739 20448 20162 19890 19642 19424 19241 19097 18992 

-29.9 -33.1 -36.4 -39.6 -42.7 -45.6 -48.1 -50.2 -51.8 -52.8 -53.1 -52.6 -51.3 -49.3 -46.5 -43.1 -39.1 -34.7 -30.0 

-75 20062 20331 20541 20691 20785 20827 20822 20775 20695 20587 20459 20318 20171 20024 19882 19749 19628 19521 19428 

-21.3 -23.9 -26.4 -28.8 -30.9 -32.9 -34.5 -35.7 -36.5 -36.9 -36.7 -36.1 -34.9 -33.2 -31.0 -28.4 -25.5 -22.3 -18.9 

-80 18533 18781 18993 19171 19314 19426 19507 19560 19588 19595 19583 19555 19515 19465 19407 19344 19276 19204 19129 

-12.4 -14.0 -15.6 -17.0 -18.2 -19.2 -20.0 -20.6 -20.8 -20.8 -20.5 -20.0 -19.1 -18.0 -16.6 -15.0 -13.2 -11.3 -9.2 

-85 17176 17334 17478 17609 17725 17828 17916 17990 18051 18098 18134 18157 18169 18170 18161 18142 18113 18075 18028 

-3.0 -3.7 -4.4 -4.9 -5.4 -5.8 -6.0 -6.2 -6.2 -6.2 -6.0 -5.7 -5.3 -4.8 -4.1 -3.4 -2.7 -1.8 -0.9 

-90 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 16157 

6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 
w 

0 

LONG 

LAT 

90 

85 

IGRF 1980 NORTH COMPONENT (X) 

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

1906 2016 2110 2189 2250 2295 2322 2331 2323 2297 2253 2193 2115 2022 1913 1789 1652 1503 1342 

-7.6 -9.4 -11.1 -12.8 -14.3 -15.8 -17.1 -18.3 -19.3 -20.2 -21.0 -21.5 -22.0 -22.2 -22.3 -22.2 -22.0 -21.6 -21.0 

4580 4704 4780 4809 4792 4729 4625 4482 4305 4099 3869 3622 3363 3100 2838 2584 2343 2120 1920 

-5.2 -7.9 -10.4 -12.9 -15.1 -17.2 -19.0 -20.6 -21.8 -22.9 -23.6 -24.0 -24.1 -23.9 -23.5 -22.8 -21.9 -20.8 -19.5 

80 6877 7027 7110 7127 7079 6968 6800 6577 6308 5998 5656 5291 4913 4533 4163 3812 3492 3213 2983 

-0.4 -3.8 -7.1 -10.2 -13.1 -15.7 -18.0 -19.9 -21.5 -22.6 -23.4 -23.8 -23.9 -23.5 -22.9 -21.9 -20.8 -19.3 -17.8 

75 8926 9094 9189 9213 9166 9053 8876 8641 8353 8017 7643 7240 6819 6393 5974 5579 5222 4918 4679 

5.7 1.7 -2.1 -5.6 -8.9 -11.9 -14.4 -16.6 -18.3 -19.5 -20.4 -20.8 -20.8 -20.5 -19.9 -19.0 -17.9 -16.7 -15.3 

70 10886 11051 11147 11175 11141 11047 10896 10693 10441 10145 9809 9442 9052 8652 8255 7877 7535 7247 7031 

11.5 7.3 3.2 -0.6 -4.1 -7.1 -9.7 -11.9 -13.5 -14.6 -15.4 -15.7 -15.7 -15.4 -15.0 -14.4 -13.7 -13.0 -12.3 

65 12895 13035 13114 13136 13108 13035 12921 12771 12585 12367 12117 11841 11543 11232 10918 10617 10344 10119 9958 

16.0 11.5 7.3 3.4 -0.1 -3.1 -5.5 -7.5 -8.9 -9.7 -10.2 -10.3 -10.2 -10.0 -9.7 -9.5 -9.3 -9.3 -9.4 

60 15042 15146 15196 15201 15171 15112 15032 14934 14821 14693 14551 14394 14224 14044 13861 13684 13526 13401 13326 

18.8 14.2 9.9 5.9 2.3 -0.7 -3.0 -4.8 -5.9 -6.5 -6.7 -6.6 -6.4 -6.1 -5.9 -5.9 -6.2 -6.7 -7.4 

55 17356 17430 17456 17447 17412 17363 17308 17254 17203 17159 17119 17084 17052 17021 16994 16970 16956 16959 16988 

20.7 15.9 11.3 7.0 3.2 0.0 -2.4 -4.2 -5.3 -5.8 -5.9 -5.8 -5.5 -5.2 -5.0 -5.1 -5.4 -6.1 -7.2 

50 19825 19890 19911 19901 19873 19837 19805 19783 19779 19798 19843 19913 20008 20123 20253 20392 20532 20671 20808 

23.0 17.9 12.8 8.0 3.7 0.1 -2.8 -5.0 -6.4 -7.3 -7.7 -7.8 -7.8 -7.6 -7.5 -7.5 -7.7 -8.2 -9.1 

45 22409 22491 22532 22545 22541 22530 22523 22530 22559 22622 22726 22877 23076 23318 23591 23880 24166 24432 24667 

27.0 21.5 15.9 10.5 5.4 1.0 -2.7 -5.7 -7.9 -9.6 -10.9 -11.8 -12.4 -12.7 -12.8 -12.7 -12.5 -12.4 -12.6 

40 25041 25164 25248 25305 25345 25375 25404 25439 25495 25586 25729 25938 26215 26557 26946 27359 27765 28135 28444 

33.1 27.3 21.3 15.2 9.3 3.9 -0.9 -4.9 -8.3 -11.3 -13.9 -16.1 -17.9 -19.0 -19.5 -19.3 -18.7 -17.7 -16.8 

35 27610 27791 27934 28053 28154 28241 28316 28386 28467 28581 28752 28999 29332 29746 30220 30722 31213 31650 32000 

40.5 34.8 28.5 21.9 15.3 8.9 3.1 -2.2 -7.0 -11.4 -15.6 -19.4 -22.6 -24.8 -25.9 -25.8 -24.6 -22.7 -20.6 

30 29948 30196 30411 30605 30781 30936 31066 31178 31289 31427 31622 31899 32272 32734 33262 33816 34351 34817 35174 

47.0 41.9 35.8 29.1 21.9 14.8 8.0 1.7 -4.4 -10.2 -15.8 -21.1 -25.5 -28.8 -30.5 -30.4 -28.8 -26.0 -22.5 

25 31821 32148 32445 32725 32984 33214 33407 33568 33716 33884 34108 34416 34821 35314 35870 36446 36991 37454 37793 

50.0 45.8 40.4 34.0 26.8 19.3 11.9 4.7 -2.1 -8.8 -15.3 -21.3 -26.6 -30.4 -32.3 -32.2 -30.0 -26.3 -21.6 

20 32970 33383 33774 34147 34495 34802 35060 35274 35469 35679 35943 36289 36727 37247 37818 38398 38936 39382 39694 

46.8 43.9 39.6 33.9 27.1 19.6 12.1 4.8 -2.2 -8.8 -15.2 -21.0 -26.0 -29.6 -31.2 -30.6 -27.8 -23.2 -17.6 

15 33167 33670 34158 34624 35055 35434 35754 36025 36275 36543 36865 37265 37750 38303 38894 39481 40015 40452 40754 

36.1 34.7 31.7 27.0 20.9 14.0 6.9 0.1 -6.0 -11.6 -16.6 -20.9 -24.5 -26.7 -27.2 -25.7 -22.2 -17.0 -10.7 

10 32292 32870 33439 33982 34477 34911 35283 35611 35929 36274 36678 37157 37710 38318 38949 39563 40120 40579 40907 

18.0 18.0 16.3 12.9 7.9 2.1 -3.9 -9.3 -13.7 -17.1 -19.5 -21.2 -22.1 -22.1 -20.9 -18.2 -14.0 -8.4 -1.9 

5 30383 30994 31603 32180 32703 33164 33574 33959 34356 34799 35310 35897 36547 37238 37938 38614 39230 39754 40159 

-5.3 -4.3 -4.7 -6.8 -10.3 -14.5 -18.5 -21.7 -23.5 -23.9 -23.0 -21.2 -18.8 -16.0 -12.7 -8.8 -4.1 1.4 7.4 

0 27643 28219 28800 29350 29849 30302 30732 31172 31659 32218 32859 33576 34348 35148 35946 36714 37426 38057 38583 

-30.4 -28.8 -28.3 -29.0 -30.6 -32.5 -34.0 -34.2 -32.8 -29.6 -25.0 -19.5 -13.8 -8.2 -3.1 1.6 6.1 10.8 15.5 
w 

LONG 

LAT 

90 

IGRF 1980 NORTH COMPONENT (X) 

90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 17 5 180 

1342 1170 990 803 609 410 209 6 -198 -399 -598 -792 -980 -1161 -1333 -1494 -1644 -1782 -1906 

-21.0 -20.2 -19.4 -18.3 -17.1 -15w8 -14.4 -12.8 -11.2 -9.5 -7.7 -5.8 -3.9 -2.0 0.0 1.9 3.8 5.7 7.6 

85 1920 1746 1600 1483 1395 1336 1302 1290 1297 1316 1343 1372 1397 1412 1413 1394 1352 1285 1191 

-19.5 -18.0 -16.5 -14.8 -13.1 -11.3 -9.6 -7.8 -6.1 -4.4 -2.8 -1.3 0.1 1.5 2.7 3.9 5.0 6.1 7.1 

80 2983 2810 2697 2649 2663 2739 2870 3047 3262 3502 3753 4003 4236 4439 4601 4711 4760 4741 4653 

-17.8 -16.1 -14.3 -12.4 -10.5 -8.7 -6.9 -5.2 -3.7 -2.2 -1.0 0.2 1.1 2.0 2.6 3.2 3.6 4.0 4.3 

75 4679 4518 4443 4459 4566 4761 5037 5380 5775 6204 6645 7079 7482 7836 8121 8322 8427 8428 8320 

-15.3 -13.9 -12.4 -10.9 -9.4 -7.9 -6.5 -5.2 -4.0 -2.9 -2.0 -1.2 -0.6 -0.1 0.2 0.4 0.5 0.5 0.5 

70 7031 6901 6870 6945 7129 7417 7801 8264 8788 9348 9918 10470 10978 11418 11766 12007 12125 12115 11970 

-12.3 -11.6 -10.9 -10.1 -9.4 -8.7 -8.0 -7.2 -6.6 -5.9 -5.3 -4.7 -4.2 -3.8 -3.5 -3.3 -3.1 -3.0 -3.0 

65 9958 9881 9900 10026 10262 10607 11050 11575 12158 12774 13391 13980 14511 14959 15302 15524 15612 15562 15372 

-9.4 -9.6 -9.8 -10.1 -10.3 -10.5 -10.5 -10.5 -10.3 -10.0 -9.6 -9.2 -8.6 -8.o -7.3 -6.7 -6.0 -5.5 -5.0 

60 13326 13317 13388 13551 13811 14167 14612 15129 15695 16284 16864 17404 17876 18257 18526 18672 18689 18575 18334 

-7.4 -8.4 -9.5 -10.6 -11.7 -12.5 -13.2 -13.6 -13.8 -13.8 -13.5 -13.0 -12.3 -11.3 -10.2 -8.9 -7.6 -6.3 -5.2 

55 16988 17054 17171 17350 17598 17918 18304 18746 19221 19706 20170 20586 20927 21172 21310 21333 21242 21043 20745 

-7.2 -8.6 -10.1 -11.6 -13.0 -14.1 -14.9 -15.4 -15.6 -15.5 -15.2 -14.7 -13.9 -12.7 -11.2 -9.5 -7.6 -5.7 -4.1 

50 20808 20947 21096 21266 21466 21703 21977 22283 22605 22922 23208 23439 23593 23655 23617 23480 23254 22950 22587 

-9.1 -10.2 -11.5 -12.8 -13.9 -14.6 -14.8 -14.7 -14.3 -13.9 -13.5 -13.0 -12.4 -11.4 -10.1 -8.3 -6.3 -4.2 -2.3 

45 24667 24864 25026 25161 25281 25398 25520 25647 25770 25874 25939 25946 25878 25725 25487 25170 24791 24371 23933 

-12.6 -13.0 -13.5 -13.8 -13.9 -13.4 -12.4 -11.1 -9.7 -8.6 -7.8 -7.5 -7.4 -7.2 -6.7 -5.6 -4.2 -2.5 -0.9 

40 28444 28676 28827 28905 28923 28899 28847 28772 28673 28542 28366 28132 27829 27454 27011 26512 25980 25441 24926 

-16.8 -16.0 -15.2 -14.2 -12.7 -10.6 -7.8 -4.8 -2.0 0.1 1.3 1.4 0.7 -0.4 -1.3 -1.8 -1.7 -1.2 -0.5 

35 32000 32239 32358 32364 32271 32102 31873 31598 31281 30918 30506 30037 29511 28929 28300 27639 26973 26331 25747 

-20.6 -18.3 -15.9 -13.3 -10.1 -6.2 -1.6 3.1 7.4 10.7 12.3 12.1 10.4 7.9 5.0 2.5 0.7 -0.6 -1.3 

30 35174 35394 35465 35393 35195 34893 34510 34060 33550 32985 32367 31697 30983 30233 29459 28680 27919 27207 26579 

-22.5 -18.7 -14.8 -10.7 -6.0 -0.6 5.4 11.4 16.9 20.9 22.8 22.4 19.9 15.9 11.2 6.5 2.5 -0.8 -3.3 

25 37793 37977 37996 37854 37570 37167 36667 36086 35434 34719 33949 33135 32291 31432 30574 29735 28934 28200 27562 

-21.6 -16.6 -11.4 -6.0 -0.4 5.7 12.2 18.7 24.5 28.7 30.6 29.9 26.7 21.7 15.6 9.3 3.4 -1.8 -5.9 

20 39694 39845 39824 39636 39300 38839 38275 37623 36895 36099 35249 34363 33462 32566 31694 30859 30079 29372 28763 

-17.6 -11.5 -5.5 0.5 6.3 12.2 18.1 23.8 28.7 32.2 33.5 32.5 29.1 23.7 17.1 10.0 2.9 -3.5 -9.0 

15 40754 40895 40866 40672 40333 39869 39301 38646 37913 37114 36264 35386 34503 33642 32819 32050 31342 30707 30159 

-10.7 -4.1 2.4 8.2 13.5 18.2 22.4 26.0 28.9 30.6 30.8 29.2 25.9 21.0 14.8 8.0 0.8 -6.0 -12.1 

10 40907 41082 41096 40952 40666 40260 39752 39159 38491 37760 36984 36184 35388 34620 33899 33237 32637 32102 31636 

-1.9 4.7 10.9 16.2 20.2 22.9 24.5 25.2 25.1 24.3 22.8 20.6 17.6 13.6 8.8 3.2 -2.9 -9.2 -15.0 

5 40159 40424 40538 40505 40335 40045 39655 39179 38632 38027 37379 36712 36048 35413 34825 34292 33816 33391 33011 

7.4 13.4 18.7 22.7 25.0 25.4 24.1 21.4 18.1 14.5 11.2 8.3 5.6 2.9 -0.1 -3.7 -8.1 -12.9 -17.8 

0 38583 38988 39257 39389 39387 39264 39035 38716 38326 37878 37391 36883 36377 35892 35445 35044 34688 34368 34069 

15.5 20.0 23.8 26.2 26.6 24.8 20.9 15.3 9.1 3.2 -1.7 -5.3 -7.6 -8.9 -10.1 -11.6 -13.8 -16.8 -20.3 
w 

t-.,) 

LONG 

LAT 

90 

85 

IGRF 1980 NORTH COMPONENT (X) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

-1906 -2016 -2110 -2189 -2250 -2295 -2322 -2331 -2323 -2297 -2253 -2193 -2115 -2022 -1913 -1789 -1652 -1503 -1342 

7.6 9.4 11.1 12.8 14.3 15.8 17.1 18.3 19.3 20.2 21.0 21.5 22.0 22.2 22.3 22.2 22.0 21.6 21.0 

1191 1070 

7.1 8.1 

924 753 563 357 141 -80 -298 -506 -699 -868 -1009 -1115 -1180 -1203 -1179 -1106 -985 

9.0 10.0 10.9 11.9 12.9 13.8 14.9 15.9 16.9 17.9 18.9 19.8 20.7 21.5 22.2 22.8 23.2 

80 4653 4493 4265 3972 3623 3227 2794 2338 1873 1412 971 561 197 -111 -352 -518 -605 -609 -528 

4.3 4.7 5.1 5.6 6.2 6.9 7.8 8.8 10.1 11.5 13.1 14.8 16.6 18.4 20.3 22.1 23.8 25.5 26.9 

75 8320 8104 7782 7364 6859 6282 5650 4980 4293 3608 2944 2322 1759 1271 871 572 380 302 337 

0.5 0.6 0.7 1.0 1.5 2.3 3.4 4.8 6.5 8.5 10.9 13.4 16.1 19.0 21.9 24.8 27.6 30.2 32.6 

70 11970 11694 11292 10774 10153 9446 8673 7854 7012 6170 5349 4573 3861 3233 2705 2290 2000 1843 1821 

-3.0 -2.9 -2.7 -2.3 -1.7 -0.7 0.7 2.6 4.9 7.6 10.7 14.1 17.8 21.6 25.4 29.2 33.0 36.5 39.8 

65 15372 15046 14592 14021 13348 12588 11760 10885 9984 9078 8189 7339 6546 5832 5213 4707 4327 4085 3989 

-5.0 -4.5 -4.1 -3.5 -2.7 -1.6 0.1 2.3 5.0 8.3 12.0 16.1 20.5 25.0 29.5 34.1 38.6 42.9 47.0 

60 18334 17974 17502 16932 16274 15543 14753 13920 13061 12191 11328 10489 9692 8953 8290 7723 7269 6944 6763 

-5.2 -4.3 -3.6 -2.8 -2.0 -0.8 0.9 3.2 6.1 9.6 13.6 18.0 22.6 27.3 32.2 37.1 42.2 47.1 52.0 

55 20745 20360 19898 19370 18785 18151 17476 16768 16035 15288 14535 13786 13055 12355 11701 11112 10610 10217 9953 

-4.1 -2.7 -1.7 -1.0 -0.2 0.8 2.2 4.3 7.0 10.3 14.0 18.1 22.3 26.7 31.3 36.2 41.4 46.9 52.6 

50 22587 22179 21741 21279 20801 20305 19793 19262 18713 18146 17562 16965 16359 15754 15161 14598 14087 13653 13324 

-2.3 -0.8 0.2 0.9 1.4 2.0 3.1 4.8 7.0 9.6 12.6 15.6 18.7 21.9 25.5 29.7 34.7 40.4 46.8 

45 23933 23498 23083 22694 22331 219R8 21656 21322 20979 20618 20234 19822 19382 18915 18428 17935 17457 17019 16652 

-0.9 0.4 1.2 1.6 1.8 2.2 3.0 4.2 5.7 7.4 9.0 10.3 11.4 12.7 14.6 17.4 21.6 27.1 33.9 

40 24926 24460 24061 23737 23483 23284 23121 22976 22830 22672 22488 22271 22011 21706 21354 20965 20553 20144 19767 

-o.5 0.1 o.5 o.6 0.1 1.0 1.7 2.6 3.4 3.9 3.7 2.7 1.3 -o.1 -0.6 o.3 3.1 8.0 14.8 

35 25747 25252 24865 24594 24428 24348 24327 24339 24362 24377 24372 24332 24246 24101 23891 23618 23291 22928 22558 

-1.3 -1.8 -2.1 -2.2 -2.1 -1.5 -0.7 0.1 0.3 -0.5 -2.7 -6.3 -10.6 -15.0 -18.3 -19.7 -18.5 -14.7 -8.5 

30 26579 26066 25690 25457 25355 25359 25439 25564 25710 25856 25988 26091 26147 26140 26056 25888 25640 25324 24964 

-3.3 -5.0 -6.1 -6.5 -6.2 -5.2 -4.0 -3.2 -3.5 -5.6 -9.8 -15.9 -23.1 -30.3 -36.2 -39.7 -40.3 -37.9 -32.7 

25 27562 27051 26688 26479 26412 26461 26593 26777 26990 27212 27429 27625 27779 27869 27875 27784 27592 27308 26953 

-5.9 -9.0 -10.9 -11.6 -11.1 -9.8 -8.2 -7.4 -8.2 -11.5 -17.4 -25.7 -35.1 -44.4 -52.2 -57.3 -59.2 -58.1 -54.3 

20 28763 28276 27931 27731 27667 27715 27846 28031 28250 28488 28731 28962 29159 29295 29347 29295 29131 28861 2850~ 

-9.0 -13.2 -15.8 -16.8 -16.4 -15.0 -13.4 -12.8 -14.3 -18.6 -25.8 -35.2 -45.8 -56.0 -64.4 -70.1 -72.7 -72.5 -70.0 

15 30159 29715 29388 29182 29089 29092 29168 29296 29462 29654 29862 30069 30253 30385 30439 30391 30231 29961 29594 

-12.1 -16.9 -20.1 -21.7 -21.6 -20.6 -19.5 -19.6 -21.8 -26.8 -34.5 -44.1 -54.4 -64.0 -71.6 -76.6 -79.1 -79.3 -78.1 

10 31636 31244 30933 30705 30556 30477 30454 30478 30539 30633 30751 30881 31002 31087 31107 31040 30871 30598 30231 

-15.0 -20.0 -23.6 -25.6 -26.2 -26.1 -26.1 -27.2 -30.2 -35.5 -42.8 -51.4 -60.0 -67.4 -73.0 -76.4 -77.9 -78.2 -77.8 

5 33011 32672 32373 32113 31892 31709 31562 31451 31376 31337 31329 31345 31366 31371 31335 31235 31053 30784 30429 

-17.8 -22.3 -25.9 -28.4 -29.9 -31.0 -32.3 -34.5 -38.2 -43.3 -49.4 -55.8 -61.5 -65.8 -68.5 -69.6 -69.9 -69.9 -70.2 

0 34069 33780 33490 33197 32904 32619 32349 32103 31888 31707 31561 31445 31350 31260 31156 31016 30822 30560 30227 

-20.3 -23.8 -27.1 -29.8 -32.2 -34.4 -37.0 -40.2 -44.1 -48.4 -52.6 -56.0 -58.2 -59.0 -58.6 -57.6 -56.7 -56.6 -57.6 
(,.) 

(,.) 

LONG 

LAT 

90 

IGRF 1980 NORTH COMPONENT (X) 

-90 -85 -80 -75 -70 -65 -60 -55 -50 

-1342 -1170 -990 -803 -609 -410 -209 -6 198 

21.0 20.2 19.4 18.3 17.1 15.8 14.4 12.8 11.2 

-45 

399 

9.5 

-40 

598 

7.7 

-35 

792 

5.8 

-30 -25 -20 -15 -10 -5 0 

980 1161 1333 1494 1644 1782 1906 

3.9 2.0 o.o -1.9 -3.8 -5.7 -7.6 

85 -985 -817 -602 -345 -so 279 636 1013 1405 1803 2201 2590 2966 3319 3646 3939 4195 4410 4580 

23.2 23.4 23.4 23.2 22.8 22.1 21.2 20.0 18.6 16.9 15.0 12.9 10.6 8.2 5.6 3.0 0.2 -2.5 -5.2 

80 -528 -364 -121 196 578 1018 1503 2023 2565 3119 3671 4211 4727 5211 5653 6046 6384 6662 6877 

26.9 28.1 29.0 29.7 30.0 30.0 29.5 28.7 27.5 26.0 24.0 21.7 19.1 16.3 13.2 9.9 6.5 3.1 -0.4 

75 337 486 742 1097 1541 2060 2639 3262 3913 4574 5231 5868 6472 7034 7542 7990 8373 8686 8926 

32.6 34.7 36.5 37.8 38.8 39.2 39.1 38.5 37.4 35.8 33.7 31.1 28.2 24.9 21.4 17.6 13.7 9.7 5.7 

70 1821 1933 2176 2540 3012 3575 4209 4895 5610 6334 7048 7733 8377 8966 9493 9951 10337 10648 10886 

39.8 42.7 45.2 47.1 48.5 49.3 49.3 48.7 47.4 45.5 43.0 40.0 36.6 32.8 28.8 24.6 20.2 15.9 11.5 

65 3989 4041 4241 4579 5042 5612 6264 6975 7717 8465 9196 9890 10532 11111 11619 12051 12407 12687 12895 

47.0 50.7 53.9 56.5 58.3 59.3 59.4 58.6 56.9 54.4 51.2 47.5 43.4 39.1 34.5 29.9 25.2 20.6 16.0 

60 6763 6735 6863 7144 7565 8108 8745 9448 10185 10925 11643 12317 12931 13474 13941 14330 14640 14875 15042 

52.0 56.6 60.8 64.2 66.7 68.1 68.2 67.2 65.0 61.9 57.9 53.4 48.6 43.5 38.4 33.4 28.4 23.6 18.8 

55 9953 9836 9877 10077 10430 10916 11510 12177 12882 13591 14276 14913 15487 15988 16412 16758 17027 17225 17356 

52.6 58.2 63.5 68.1 71.6 73.7 74.4 73.5 71.1 67.5 63.0 57.8 52.3 46.8 41.3 35.9 30.7 25.7 20.7 

50 13324 13124 13073 13180 13444 13850 14374 14981 15634 16298 16941 17540 18080 18551 18950 19273 19525 19706 19825 

46.8 53.5 60.1 66.1 71.1 74.5 76.2 76.2 74.3 71.0 66.5 61.3 55.6 49.8 44.2 38.7 33.4 28.2 23.0 

45 16652 16387 16249 16257 16418 16724 17156 17683 18271 18884 19492 20069 20599 21070 21475 21812 22077 22274 22409 

33.9 41.6 49.5 57.1 63.8 69.1 72.6 74.2 74.0 72.0 68.5 64.1 58.9 53.5 48.1 42.8 37.6 32.4 27.0 

40 19767 19455 19240 19148 19195 19385 19708 20143 20660 21228 21816 22399 22955 23467 23922 24309 24623 24864 25041 

14.8 22.9 31.9 40.9 49.3 56.8 62.8 67.1 69.6 70.1 68.9 66.2 62.4 58.0 53.2 48.4 43.5 38.5 33.1 

35 22558 22213 21929 21738 21667 21733 21938 22273 22720 23252 23842 24461 25079 25671 26211 26681 27069 27375 27610 

-8.5 -0.5 8.8 18.8 28.8 38.4 47.3 54.9 60.9 64.9 66.9 66.8 65.1 62.1 58.5 54.4 50.2 45.6 40.5 

30 24964 24592 24245 23960 23775 23716 23802 24038 24417 24921 25524 26193 26892 27581 28223 28789 29262 29644 29948 

-32.7 -25.4 -16.5 -6.5 4.4 15.8 27.3 38.4 48.2 56.2 61.7 64.6 65.2 64.0 61.6 58.6 55.2 51.4 47.0 

25 26953 26554 26150 25783 25494 25323 25298 25438 25747 26216 26820 27525 28287 29056 29784 30434 30987 31443 31821 

-54.3 -48.3 -40.6 -31.4 -20.6 -8.3 5.1 19.0 32.2 43.6 52.4 58.1 60.9 61.3 60.1 58.2 55.9 53.3 50.0 

20 28501 28078 27629 27197 26826 26560 26437 26483 26711 27117 27683 28373 29140 29930 30693 31387 31994 32515 32970 

-70.0 -65.8 -59.9 -52.3 -42.6 -30.6 -16.6 -1.4 13.8 27.5 38.4 46.0 50.3 51.9 51.9 51.1 50.0 48.7 46.8 

15 29594 29155 28679 28204 27776 27438 27228 27177 27300 27601 28063 28656 29338 30060 30777 31453 32074 32641 33167 

-78.1 -75.6 -71.9 -66.5 -58.9 -48.5 -35.5 -20.7 -5.5 8.5 20.0 28.2 33.0 35.3 36.0 36.2 36.3 36.4 36.1 

10 30231 29791 29307 28814 28351 27957 27666 27507 27497 27639 27925 28332 28829 29384 29966 30553 31136 31714 32292 

-77.8 -77.0 -75.6 -72.8 -67.9 -60.3 -49.9 -37.5 -24.3 -12.0 -1.7 5.6 10.2 12.5 13.6 14.5 15.7 17.0 18.0 

5 30429 30004 29530 29035 28551 28109 27738 27459 27287 27227 27276 27424 27657 27963 28334 28764 29253 29796 30383 

-70.2 -70.9 -71.6 -71.5 -69.7 -65.6 -59.0 -50.6 -41.2 -32.3 -24.8 -19.3 -15.8 -13.9 -12.5 -11.1 -9.3 -7.2 -5.3 

0 30227 29826 29371 28882 28381 27891 27434 27026 26678 26395 26180 26035 25965 25980 26095 26321 26662 27111 27643 

-57.6 -59.7 -62.3 -64.6 -65.9 -65.5 -63.4 -59.7 -55.2 -50.6 -46.6 -43.6 -41.5 -40.1 -38.7 -37.1 -35.0 -32.6 -30.4 
~ 

IGRF 1980 NORTH COMPONENT (X) 

LONG 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

LAT 

0 27643 28219 28800 29350 29849 30302 30732 31172 31659 32218 32859 33576 34348 35148 35946 36714 37426 38057 38583 

-30.4 -28.8 -28.3 -29.0 -30.6 -32.5 -34.0 -34.2 -32.8 -29.6 -25.0 -19.5 -13.8 -8.2 -3.1 1.6 6.1 10.8 15.5 

-5 24400 24860 25333 25786 26210 26622 27055 27548 28129 28813 29593 30449 31351 32269 33177 34053 34879 35637 36312 

-53.6 -51.9 -50.7 -49.9 -49.3 -48.4 -46.7 -43.6 -38.7 -32.0 -24.0 -15.3 -6.8 0.7 6.9 11.6 15.2 18.2 20.8 

-10 21029 21302 21600 21902 22215 22565 22993 23534 24206 25006 25911 26888 27902 28922 29924 30894 31822 32700 33516 

-71.9 -70.3 -68.4 -66.1 -63.0 -59.0 -53.9 -47.3 -39.1 -29.5 -19.0 -8.3 1.6 9.9 16.0 19.8 21.6 22.1 22.0 

-15 17873 17921 18014 18147 18340 18629 19053 19636 20381 21267 22258 23311 24388 25459 26508 27527 28515 29470 30387 

-83.4 -82.1 -79.6 -75.5 -69.9 -62.9 -54.4 -44.8 -34.1 -22.7 -11.0 0.2 10.1 17.7 22.6 24.5 23.9 21.6 18.4 

-20 15187 15022 14927 14914 15014 15264 15691 16305 17092 18015 19028 20086 21150 22199 23222 24219 25197 26161 27112 

-88.0 -86.8 -83.6 -78.0 -70.1 -60.4 -49.4 -37.7 -25.7 -13.7 -2.4 7.8 16.1 21.9 24.6 24.2 21.1 16.0 10.1 

-25 13122 12802 12579 12479 12534 12774 13213 13840 14626 15523 16482 17458 18424 19363 20275 21167 22053 22945 23849 

-87.1 -85.5 -81.5 -74.6 -65.0 -53.6 -41.3 -28.8 -16.9 -6.0 3.6 11.4 17.2 20.3 20.6 18.0 12.8 5.8 -1.9 

-30 11743 11349 11079 10961 11022 11279 11726 12338 13072 13876 14703 15517 16300 17048 17768 18477 19193 19933 20707 

-82.5 -80.2 -75.3 -67.5 -57.2 -45.4 -33.1 -21.5 -11.2 -2.6 4.1 8.9 11.6 12.1 10.3 6.1 -0.1 -7.8 -16.1 

-35 11054 10667 10420 10338 10437 10715 11152 11709 12337 12986 13617 14204 14740 15233 15699 16161 16642 17164 17740 

-40 

-76.2 -72.9 -67.2 -59.1 -49.1 -38.2 -27.5 -18.0 -10.5 -5.0 -1.7 -0.2 -0.3 -2.0 -5.2 -9.9 -15.9 -22.9 -30.3 

11027 10696 10510 10484 10617 10895 11283 11738 12210 12655 13044 13362 13614 13814 13987 14161 14365 14621 14947 

-69.5 -65.0 -58.8 -50.9 -42.1 -33.2 -25.2 -18.9 -14.7 -12.8 -12.7 -14.1 -16.4 -19.4 -23.0 -27.2 -31.9 -37.1 -42.5 

-45 11600 11334 11205 11213 11345 11575 11865 12168 12441 12649 12772 12804 12756 12651 12517 12387 12290 12254 12300 

-62.8 -57.2 -50.7 -43.6 -36.6 -30.2 -25.4.-22.5 -21.8 -23.0 -25.6 -29.1 -32.7 -36.2 -39.4 -42.3 -45.0 -47.8 -50.7 

-50 12667 12441 12330 12322 12397 12522 12659 12768 12812 12764 12613 12359 12018 11615 11179 10746 10346 10011 9765 

-55.8 -49.4 -43.0 -37.0 -31.8 -28.0 -26.0 -26.1 -28.1 -31.7 -36.1 -40.7 -44.9 -48.2 -50.5 -52.0 -52.8 -53.3 -53.9 

-55 14065 13837 13690 13609 13567 13535 13477 13361 13158 12850 12431 11905 11290 10608 9892 9174 8487 7865 7333 

-48.2 -41.4 -35.3 -30.2 -26.6 -24.8 -24.9 -27.0 -30.6 -35.4 -40.5 -45.4 -49.5 -52.3 -53.9 -54.2 -53.8 -52.8 -51.9 

-60 15578 15304 15075 14872 14672 14447 14170 13816 13365 12806 12135 11361 10498 9570 8605 7635 6693 5811 5018 

-39.5 -32.8 -27.2 -22.9 -20.3 -19.6 -20.7 -23.5 -27.6 -32.4 -37.3 -41.8 -45.4 -47.8 -49.0 -49.0 -48.2 -46.9 -45.6 

-65 16951 16605 16266 15916 15536 15107 14608 14022 13337 12547 11651 10660 9586 8451 7281 6105 4953 3856 2843 

-30.0 -23.9 -18.8 -15.1 -13.0 -12.5 -13.6 -16.0 -19.4 -23.4 -27.5 -31.3 -34.4 -36.5 -37.7 -38.1 -37.8 -37.2 -36.6 

-70 17931 17503 17045 16544 15988 15363 14658 13862 12970 11981 10897 9729 8489 7197 5875 4548 3244 1989 810 

-20.3 -15.1 -10.7 -7.5 -5.4 -4.7 -5.1 -6.6 -8.9 -11.6 -14.6 -17.5 -20.0 -22.1 -23.7 -24.8 -25.5 -26.1 -26.7 

-75 18292 17785 17215 16576 15861 15065 14183 13212 12151 11004 9777 8480 7126 5731 4315 2898 1503 153 -1131 

-11.3 -7.3 -3.8 -1.0 1.0 2.1 2.4 1.9 0.8 -0.8 -2.6 -4.7 -6.8 -8.8 -10.7 -12.4 -14.1 -15.8 -17.4 

-80 17866 17287 16619 15863 15018 14084 13064 11960 10776 9520 8199 6824 5408 3964 2509 1060 -367 -1753 -3081 

-85 

-90 

-3.7 -0.9 1.5 3.6 5.2 6.3 6.9 7.1 6.7 6.0 4.9 3.6 2.0 0.2 -1.7 -3.6 -5.7 -7.8 -9.9 

16553 15907 15159 14312 13371 12342 11229 10040 8783 7467 6102 4699 3269 1824 

2.5 3.8 5.0 6.1 7.0 7.6 8.0 8.1 8.0 7.6 7.0 6.1 5.0 3.8 

377 -1058 -2468 -3841 -5162 

2.4 0.8 -0.8 -2.5 -4.2 

14330 13625 12816 11910 10913 9833 8678 7457 6180 4855 3494 2105 

7.4 7.3 7.3 7.1 7.0 6.7 6.5 6.1 5.8 5.3 4.9 4.4 

701 -708 -2112 -3500 -4862 -6186 -7464 

3.8 3.3 2.7 2.1 1.5 0.8 0.2 
w 

01 

IGRF 1980 NORTH COMPONENT (X) 

LONG 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 

LAT 

0 38583 38988 39257 39389 39387 39264 39035 38716 38326 37878 37391 36883 36377 35892 35445 35044 34688 34368 34069 

15.5 20.0 23.8 26.2 26.6 24.8 20.9 15.3 9.1 3.2 -1.7 -5.3 -7.6 -8.9 -10.1 -11.6 -13.8 -16.8 -20.3 

-5 36312 36885 37343 37673 37872 37944 37900 37758 37536 37254 36932 36588 36240 35903 35592 35314 35066 34837 34610 

20.8 23.1 24.8 25.3 24.0 20.5 14.8 7.5 -0.4 -7.8 -13.7 -17.6 -19.4 -19.7 -19.4 -19.0 -19.3 -20.5 -22.3 

-10 33516 34256 34901 35433 35837 36108 36250 36279 36217 36090 35919 35723 35518 35316 35127 34956 34802 34654 34492 

22.0 21.5 20.8 19.4 16.7 12.2 6.0 -1.6 -9.7 -17.2 -23.0 -26.6 -28.0 -27.6 -26.3 -24.8 -23.7 -23.4 -23.8 

-15 30387 31255 32053 32755 33338 33783 34090 34269 34344 34346 34300 34228 34144 34057 33975 33901 33832 33758 33662 

18.4 15.1 11.9 8.7 5.0 0.5 -5.1 -11.6 -18.3 -24.3 -29.0 -31.7 -32.5 -31.8 -30.1 -28.1 -26.4 -25.3 -24.7 

-20 27112 28041 28927 29741 30448 31023 31455 31752 31937 32041 32094 32120 32135 32146 32158 32172 32186 32189 32167 

10.1 4.3 -1.0 -5.6 -9.6 -13.5 -17.5 -21.8 -25.9 -29.6 -32.2 -33.6 -33.6 -32.6 -31.0 -29.2 -27.6 -26.2 -25.2 

-25 23849 24757 25651 26499 27263 27911 28424 28805 29072 29256 29388 29495 29591 29687 29785 29885 29984 30072 30138 

-1.9 -9.4 -16.0 -21.2 -25.2 -28.0 -30.1 -31.7 -32.9 -33.7 -34.0 -33.6 -32.8 -31.6 -30.2 -28.9 -27.7 -26.6 -25.5 

-30 20707 21512 22332 23137 23887 24549 25100 25533 25863 26115 26318 26496 26668 26842 27023 27209 27396 27578 27743 

-16.1 -24.0 -30.9 -36.1 -39.5 -41.2 -41.5 -40.8 -39.4 -37.6 -35.6 -33.7 -31.9 -30.5 -29.4 -28.5 -27.8 -27.0 -26.1 

-35 17740 18371 19045 19736 20411 21036 21584 22045 22425 22741 23014 23267 23516 23770 24034 24309 24590 24870 25140 

-40 

-30.3 -37.4 -43.4 -47.9 -50.6 -51.3 -50.4 -48.2 -45.1 -41.7 -38.2 -35.2 -32.7 -30.9 -29.8 -29.0 -28.5 -27.9 -27.3 

14947 15350 15823 16347 16897 17440 17954 18421 18840 19216 19564 19899 20232 20573 20927 21293 21669 22050 22425 

-42.5 -47.6 -52.1 -55.4 -57.2 -57.4 -56.0 -53.4 -49.9 -45.9 -42.0 -38.5 -35.6 -33.5 -32.0 -31.1 -30.4 -29.7 -29.0 

-45 12300 12439 12674 12993 13378 13805 14252 14701 15142 15571 15992 16412 16836 17270 17717 18179 18651 19129 19603 

-50.7 -53.5 -56.0 -58.0 -59.1 -59.1 -58.0 -56.0 -53.1 -49.7 -46.3 -43.0 -40.1 -37.7 -35.9 -34.3 -33.1 -31.9 -30.9 

-50 9765 9626 9601 9689 9881 10160 10508 10907 11341 11800 12279 12773 13283 13809 14349 14903 15468 16035 16599 

-53.9 -54.5 -55.4 -56.2 -56.9 -57.1 -56.8 -55.9 -54.3 -52.3 -49.9 -47.4 -44.8 -42.4 -40.1 -37.9 -35.9 -34.1 -32.5 

-55 7333 6915 6625 6470 6449 6551 6765 7073 7459 7908 8408 8948 9520 10117 10736 11370 12013 12659 13299 

-51.9 -51.2 -51.0 -51.2 -51.8 -52.5 -53.1 -53.5 -53.4 -52.8 -51.7 -50.1 -48.1 -45.8 -43.2 -40.5 -37.8 -35.2 -32.9 

-60 5018 4340 3796 3399 3152 3055 3100 3273 3561 3946 4413 4947 5534 6164 6826 7511 8210 8914 9614 

-45.6 -44.7 -44.3 -44.5 -45.3 -46.5 -47.9 -49.3 -50.4 -51.0 -50.9 -50.2 -48.8 -46.7 -44.0 -41.0 -37.8 -34.7 -31.8 

-65 2843 1941 1169 545 77 -230 -380 -381 -242 20 391 855 1396 2000 2654 3346 4064 4798 5539 

-36.6 -36.3 -36.4 -37.1 -38.3 -40.0 -42.0 -43.9 -45.6 -46.9 -47.4 -47.3 -46.3 -44.5 -42.0 -39.0 -35.7 -32.3 -29.0 

-70 810 -268 -1225 -2045 -2714 -3226 -3579 -3776 -3824 -3733 -3514 -3182 -2751 -2235 -1647 -1001 -307 423 1180 

-26.7 -27.4 -28.5 -29.9 -31.6 -33.6 -35.7 -37.8 -39.6 -40.9 -41.7 -41.7 -41.0 -39.6 -37.4 -34.7 -31.6 -28.4 -25.1 

-75 -1131 -2327 -3417 -4385 -5218 -5909 -6451 -6844 -7089 -7192 -7160 -7001 -6727 -6347 -5875 -5319 -4691 -4000 -3254 

-17.4 -19.2 -21.0 -23.0 -25.1 -27.2 -29.2 -31.0 -32.6 -33.7 -34.4 -34.4 -33.9 -32.7 -31.0 -28.8 -26.2 -23.4 -20.5 

-80 -3081 -4335 -5499 -6561 -7508 -8332 -9025 -9584-10006-10292-10443-10465-10361-10138 -9803 -9364 -8827 -8201 -7492 

-9.9 -12.0 -14.2 -16.3 -18.3 -20.2 -21.9 -23.4 -24.6 -25.5 -25.9 -26.0 -25.6 -24.8 -23.6 -22.0 -20.2 -18.2 -16.0 

-85 -5162 -6421 -7604 -8702 -9704-10601-11388-12056-12603-13025-13319-13487-13527-13442-13234-12907-12466-11915-11260 

-4.2 -6.0 -7.7 -9.3 -10.8 -12.2 -13.5 -14.6 -15.4 -16.0 -16.4 -16.6 -16.5 -16.2 -15.6 -14.8 -13.9 -12.8 -11.7 

-90 -7464 -8684 -9839-10918-11915-12821-13629-14333-14929-15410-15775-16019-16142-16142-16019-15774-15408-14926-14330 

0.2 -0.4 -1.1 -1.7 -2.3 -2.9 -3.5 -4.1 -4.6 -5.1 -5.5 -5.9 -6.3 -6.6 -6.8 -7.1 -7.2 -7.3 -7.4 
w 

0. 

IGRF 1980 NORTH COMPONENT (X) 

LONG 180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

LAT 

0 34069 33780 33490 33197 32904 32619 32349 32103 31888 31707 31561 31445 31350 31260 31156 31016 30822 30560 30227 

-20.3 -23.8 -27.1 -29.8 -32.2 -34.4 -37.0 -40.2 -44.1 -48.4 -52.6 -56.0 -58.2 -59.0 -58.6 -57.6 -56.7 -56.6 -57.6 

-5 34610 34366 34090 33777 33433 33071 32708 32356 32027 31726 31457 31219 31010 30823 30645 30461 30250 29993 29679 

-22.3 -24.7 -27.2 -29.9 -32.7 -35.8 -39.2 -42.9 -46.4 -49.3 -51.1 -51.3 -50.0 -47.6 -44.8 -42.3 -40.9 -41.2 -43.1 

-10 34492 34294 34045 33739 33381 32989 32583 32177 31785 31410 31057 30727 30425 30151 29901 29665 29425 29160 28850 

-23.8 -24.9 -26.6 -28.9 -31.6 -34.9 -38.5 -41.9 -44.5 -45.7 -44.9 -42.2 -38.1 -33.3 -29.0 -26.1 -25.2 -26.4 -29.6 

-15 33662 33522 33322 33056 32731 32365 31976 31581 31187 30797 30411 30033 29668 29326 29009 28715 28430 28136 27812 

-24.7 -24.8 -25.6 -27.1 -29.4 -32.2 -35.3 -37.8 -39.1 -38.3 -35.3 -30.4 -24.5 -18.7 -14.2 -12.0 -12.3 -15.1 -19.7 

-20 32167 32101 31977 31788 31542 31254 30940 30612 30273 29922 29554 29171 28780 28394 28021 27669 27331 26995 26643 

-25.2 -24.6 -24.6 -25.3 -26.7 -28.8 -30.8 -32.1 -31.9 -29.5 -25.0 -18.9 -12.3 -6.7 -3.1 -2.3 -4.4 -8.9 -14.9 

-25 30138 30164 30140 30059 29927 29755 29554 29332 29087 28813 28501 28151 27769 27367 26961 26565 26183 25810 25434 

-25.5 -24.6 -24.1 -24.1 -24.8 -25.8 -26.8 -26.9 -25.5 -22.2 -17.0 -10.8 -4.7 -0.1 2.1 1.2 -2.6 -8.4 -15.4 

-30 27743 27877 27969 28015 28015 27976 27905 27804 27668 27489 27255 26965 26621 26239 25837 25433 25039 24660 24289 

-26.1 -25.2 -24.5 -24.1 -24.2 -24.6 -24.8 -24.2 -22.3 -18.8 -13.9 -8.4 -3.5 -0.3 0.3 -1.9 -6.6 -13.1 -20.3 

-35 25140 25388 25603 25778 25910 26003 26057 26072 26043 25960 25815 25603 25330 25009 24659 24302 23953 23622 23303 

-40 

-27.3 -26.5 -25.8 -25.4 -25.4 -25.6 -25.6 -24.9 -23.2 -20.3 -16.4 -12.3 -8.8 -7.0 -7.4 -10.2 -15.1 -21.2 -27.8 

22425 22784 23115 23409 23662 23871 24035 24153 24221 24231 24181 24068 23899 23686 23447 23202 22966 22747 22541 

-29.0 -28.3 -27.8 -27.6 -27.7 -28.1 -28.5 -28.4 -27.5 -25.8 -23.4 -20.8 -18.8 -17.9 -18.8 -21.3 -25.4 -30.3 -35.7 

-45 19603 20063 20497 20894 21249 21558 21817 22027 22187 22296 22355 22366 22337 22280 22210 22140 22082 22036 21995 

-30.9 -30.1 -29.7 -29.7 -30.2 -31.0 -32.0 -32.8 -33.1 -32.7 -31.8 -30.7 -29.8 -29.5 -30.2 -31.9 -34.7 -38.0 -41.8 

-so 16599 17147 17668 18155 18598 18995 19344 19648 19910 20133 20324 20490 20638 20779 20922 21075 21239 21408 21569 

-32.5 -31.3 -30.7 -30.7 -31.4 -32.6 -34.1 -35.7 -37.0 -37.8 -38.1 -38.0 -37.8 -37.8 -38.1 -39.0 -40.4 -42.3 -44.7 

-55 13299 13922 14521 15087 15614 16101 16549 16962 17346 17710 18062 18412 18766 19132 19513 19908 20312 20711 21085 

-32.9 -31.2 -30.1 -29.8 -30.3 -31.5 -33.2 -35.0 -36.8 -38.3 -39.3 -39.9 -40.1 -40.2 -40.2 -40.5 -41.0 -42.0 -43.6 

-60 9614 10303 10972 11616 12232 12820 13384 13928 14462 14993 15532 16085 16659 17255 17872 18503 19136 19753 20330 

-31.8 -29.4 -27.7 -26.8 -26.7 -27.4 -28.6 -30.1 -31.8 -33.3 -34.5 -35.4 -35.8 -36.1 -36.1 -36.3 -36.7 -37.5 -39.0 

-65 5539 6281 7016 7741 8454 9158 9855 10551 11254 11970 12706 13466 14253 15065 15895 16733 17564 18368 19123 

-29.0 -26.2 -23.8 -22.2 -21.3 -21.0 -21.4 -22.1 -23.1 -24.1 -25.1 -25.9 -26.5 -27.0 -27.4 -28.0 -28.8 -30.0 -31.9 

-70 1180 1958 2751 3556 4371 5197 6037 6892 7769 8668 9594 10547 11524 12521 13528 14534 15524 16479 17381 

-25.1 -22.0 -19.3 -17.1 -15.3 -14.2 -13.5 -13.3 -13.4 -13.8 -14.3 -14.9 -15.5 -16.3 -17.1 -18.2 -19.6 -21.4 -23.7 

-75 -3254 -2461 -1625 -752 156 1098 2071 3076 4111 5176 6268 7384 8518 9663 10810 11946 13059 14134 1515~ 

-20.5 -17.7 -15.0 -12.5 -10.4 -8.7 -7.3 -6.4 -5.8 -5.5 -5.6 -5.9 -6.5 -7.3 -8.4 -9.8 -11.5 -13.6 -15.9 

-80 -7492 -6707 -5853 -4934 -3957 -2926 -1847 -723 440 1636 2859 4102 5358 6618 7872 9110 10321 11493 12616 

-16.0 -13.8 -11.5 -9.4 -7.5 -5.8 -4.3 -3.1 -2.2 -1.6 -1.4 -1.4 -1.8 -2.4 -3.3 -4.5 -6.0 -7.6 -9.5 

-85 -11260-10506 -9661 -8730 -7721 -6641 -5498 -4300 -3054 -1770 -457 877 2223 3570 4908 6229 7522 8777 9985 

-11.7 -10.4 -9.1 -7.9 -6.7 -5.5 -4.5 -3.6 -2.8 -2.2 -1.8 -1.6 -1.6 -1.7 -2.0 -2.5 -3.0 -3.7 -4.4 

-90 -14330-13625-12816-11910-10913 -9833 -8678 -7458 -6180 -4855 -3494 -2106 -701 708 2112 3500 4862 6186 7464 

-7.4 -7.3 -7.3 -7.1 -7.0 -6.7 -6.5 -6.1 -5.8 -5.3 -4.9 -4.4 -3.8 -3.3 -2.7 -2.1 -1.5 -0.8 -0.2 
w 

....... 

LONG 

LAT 

-90 -85 -80 -75 

IGRF 1980 

-70 -65 -60 -55 

NORTH COMPONENT (X) 

-50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

0 30227 29826 29371 28882 28381 27891 27434 27026 26678 26395 26180 26035 25965 25980 26095 26321 26662 27111 27643 

-57.6 -59.7 -62.3 -64.6 -65.9 -65.5 -63.4 -59.7 -55.2 -50.6 -46.6 -43.6 -41.5 -40.1 -38.7 -37.1 -35.0 -32.6 -30.4 

-5 29679 29301 28863 28376 27854 27314 26770 26234 25714 25217 24750 24326 23966 23697 23551 23550 23703 23998 24400 

-43.1 -46.4 -50.6 -54.9 -58.8 -61.9 -64.0 -65.2 -65.5 -65.4 -64.9 -64.3 -63.5 -62.5 -61.2 -59.6 -57.7 -55.6 -53.6 

-10 28850 28483 28052 27560 27013 26422 25798 25148 24482 23807 23135 22487 21891 21384 21005 20784 20727 20822 21029 

-29.6 -34.2 -39.6 -45.5 -51.4 -57.2 -62.7 -67.8 -72.2 -75.7 -78.0 -79.2 -79.2 -78.4 -77.2 -75.8 -74.5 -73.2 -71.9 

-15 27812 27438 27004 26501 25931 25299 24611 23875 23102 22301 21489 20689 19932 19255 18697 18283 18020 17893 17873 

-19.7 -25.5 -31.9 -38.7 -45.8 -53.3 -61.1 -68.8 -75.9 -81.7 -85.6 -87.7 -88.0 -87.2 -86.0 -84.9 -84.3 -83.9 -83.4 

-20 26643 26254 25812 25303 24721 24066 23340 22552 21714 20840 19950 19067 18221 17442 16762 16198 15756 15425 15187 

-14.9 -21.6 -28.6 -35.8 -43.4 -51.6 -60.3 -69.2 -77.4 -84.0 -88.5 -90.6 -90.7 -89.6 -88.3 -87.6 -87.6 -88.0 -88.0 

-25 25434 25037 24598 24099 23526 22872 22137 21329 20463 19557 18634 17717 16833 16004 15251 14586 14012 13526 13122 

-15.4 -22.6 -29.8 -37.0 -44.4 -52.4 -61.0 -69.8 -77.9 -84.3 -88.4 -89.9 -89.5 -88.1 -86.6 -86.0 -86.2 -86.9 -87.1 

-30 24289 23909 23499 23035 22498 21872 21155 20354 19484 18570 17637 16711 15815 14966 14178 13457 12808 12234 11743 

-20.3 -27.5 -34.4 -41.1 -48.0 -55.3 -63.2 -71.2 -78.4 -83.9 -87.2 -88.1 -87.1 -85.2 -83.5 -82.6 -82.6 -82.9 -82.5 

-35 23303 22984 22640 22243 21768 21195 20517 19741 18884 17973 17040 16111 15211 14356 13557 12819 12149 11556 11054 

-40 

-27.8 -34.3 -40.5 -46.5 -52.7 -59.3 -66.3 -73.3 -79.4 -84.0 -86.5 -86.8 -85.4 -83.2 -81.0 -79.5 -78.6 -77.8 -76.2 

22541 22331 22093 21794 21406 20907 20286 19551 18720 17823 16896 15969 15070 14217 13423 12697 12046 11484 11027 

-35.7 -41.0 -46.3 -51.5 -57.1 -63.o -69.4 -7s.s -80.9 -84.9 -86.9 -86.9 -85.3 -82.8 -8o.o -77.4 -7s.o -72.6 -69.5 

-45 21995 21940 21842 21669 21390 20983 20439 19764 18979 18116 17211 16300 15414 14576 13803 13107 12500 11993 11600 

-41.8 -45.9 -50.1 -54.7 -59.8 -65.5 -71.4 -77.2 -82.2 -85.9 -87.8 -87.8 -86.1 -83.2 -79.6 -75.8 -71.8 -67.6 -62.8 

-so 21569 21698 21765 21738 21588 2129s 20853 20268 19561 18764 17915 17050 16204 15404 14671 14019 13462 13009 12667 

-44.7 -47.6 -51.1 -55.3 -60.2 -65.7 -71.5 -77.2 -82.1 -85.7 -87.7 -87.7 -86.0 -82.8 -78.5 -73.5 -67.9 -62.0 -55.8 

-55 21085 21409 21652 21785 21783 21630 21320 20862 20277 19594 18848 18076 17310 16581 15909 15313 14803 14387 14065 

-43.6 -46.0 -49.1 -53.1 -57.9 -63.4 -69.1 -74.6 -79.5 -83.0 -85.0 -85.0 -83.2 -79.7 -74.8 -68.9 -62.2 -55.2 -48.2 

-60 20330 20842 21261 21562 21724 21735 21592 21304 20888 20370 19780 19151 18512 17889 17305 16775 16309 15910 15578 

-39.0 -41.3 -44.4 -48.4 -53.1 -58.4 -63.9 -69.1 -73.5 -76.7 -78.4 -78.3 -76.3 -72.6 -67.5 -61.1 -54.1 -46.7 -39.5 

-65 19123 19805 20391 20860 21197 21393 21446 21362 21156 20848 20459 20016 19543 19060 18586 18134 17710 17317 16951 

-31.9 -34.4 -37.7 -41.6 -46.1 -51.0 -55.8 -60.3 -64.0 -66.6 -67.7 -67.3 -65.2 -61.5 -56.5 -50.4 -43.7 -36.7 -30.0 

-70 17381 18210 18949 19582 20096 20486 20748 20888 20913 20837 20674 20441 20155 19830 19479 19111 18730 18338 17931 

-23.7 -26.5 -29.8 -33.5 -37.5 -41.5 -45.4 -48.8 -51.5 -53.2 -53.7 -52.9 -50.8 -47.5 -43.0 -37.8 -32.0 -26.0 -20.3 

-75 15156 16112 16987 17770 18452 19027 19492 19847 20097 20246 20302 20274 20170 19999 19766 19478 19136 18741 18292 

-15.9 -18.6 -21.5 -24.6 -27.7 -30.6 -33.3 -35.5 -37.1 -37.9 -37.9 -36.9 -35.0 -32.2 -28.7 -24.6 -20.2 -15.7 -11.3 

-80 12616 13679 14671 15585 16411 17145 17782 18319 18755 19090 19325 19463 19505 19454 19312 19082 18764 18358 17866 

-9.5 -11.4 -13.4 -15.4 -17.4 -19.1 -20.5 -21.6 -22.2 -22.4 -21.9 -21.0 -19.5 -17.5 -15.1 -12.4 -9.5 -6.6 -3.7 

-85 9985 11138 12225 13241 14176 15024 15781 16439 16997 17449 17793 18027 18151 18162 18061 17849 17526 17093 16553 

-4.4 -5.2 -5.9 -6.6 -7.2 -7.7 -8.0 -8.1 -8.1 -7.8 -7.3 -6.5 -5.6 -4.5 -3.2 -1.9 -0.4 1.0 2.5 

-90 7464 8684 9839 10918 11915 12820 13629 14333 14929 15410 15775 16019 16142 16142 16018 15773 15408 14926 14330 

-0.2 0.4 1.1 1.7 2.3 2.9 3.5 4.1 4.6 5.1 5.5 5.9 6.3 6.6 6.8 7.1 7.2 7.3 7.4 
w 

co 

LONG 

LAT 

90 

IGRF 1980 EAST COMPONENT (Y) 

0 5 10 15 20 25 30 35 40 

-1342 -1170 -990 -803 -609 -410 -209 -6 198 

21.0 20.2 19.4 18.3 17.1 15.8 14.4 12.8 11.2 

45 

399 

9. 5 

50 

598 

7. 7 

55 

792 

5.8 

60 65 70 75 80 85 90 

980 1161 1333 1494 1644 1782 1906 

3.9 2.0 o.o -1.9 -3.8 -5.7 -7.6 

85 -1503 -1136 -762 -387 -18 338 675 987 1270 1520 1733 1906 2038 2130 2181 2193 2170 2115 2033 

26.0 25.2 24.0 22.6 20.9 19.0 16.8 14.5 12.1 9.5 6.9 4.2 1.6 -1.0 -3.5 -5.9 -8.1 -10.2 -12.1 

80 -1706 -1190 -666 -147 360 844 1295 1706 2069 2375 2620 2797 2905 2942 2908 2805 2640 2418 2150 

30.8 29.9 28.6 26.8 24.7 22.2 19.5 16.5 13.3 10.1 6.7 3.4 0.2 -2.9 -5.8 -8.5 -11.0 -13.2 -15.0 

75 -1899 -1280 -656 -40 559 1131 1665 2150 2578 2939 3223 3423 3532 3546 3462 3282 3010 2655 2230 

35.1 34.1 32.6 30.5 28.0 25.1 21.8 18.2 14.5 10.7 6.9 3.1 -0.5 -3.9 -7.0 -9.8 -12.3 -14.4 -16.1 

70 -2036 -1355 -676 -9 637 1252 1828 2354 2822 3221 3540 3768 3893 3908 3805 3582 3241 2791 2244 

38.7 37.6 35.9 33.5 30.6 27.2 23.4 19.4 15.2 11.0 6.9 2.9 -0.8 -4.1 -7.2 -9.8 -12.0 -13.9 -15.4 

65 -2095 -1382 -681 -1 652 1269 1847 2377 2853 3265 3602 3849 3993 4020 3919 3682 3307 2799 2173 

41.8 40.5 38.5 35.9 32.5 28.7 24.4 19.9 15.3 10.8 6.5 2.5 -1.0 -4.1 -6.7 -8.9 -10.7 -12.1 -13.2 

60 -2078 -1353 -652 16 646 1235 1782 2282 2734 3130 3460 3709 3862 3901 3811 3578 3198 2670 2007 

44.5 43.1 40.8 37.8 34.0 29.6 24.9 19.9 14.9 10.2 5.8 2.0 -1.3 -4.0 -6.0 -7.6 -8.7 -9.5 -10.1 

55 -2014 -1285 -595 48 641 1184 1678 2126 2528 2881 3178 3405 3548 3587 3506 3288 2923 2408 1750 

47.2 45.6 43.1 39.7 35.5 30.6 25.3 19.7 14.4 9.4 5.0 1.3 -1.7 -3.9 -5.4 -6.3 -6.7 -6.9 -6.9 

50 -1943 -1213 -536 80 634 1126 1562 1948 2286 2577 2818 2998 3107 3127 3044 2841 2506 2031 1419 

49.9 48.3 45.7 42.1 37.5 32.0 26.1 20.0 14.3 9.0 4.6 0.9 -1.9 -3.8 -5.0 -5.4 -5.3 -4.8 -4.3 

45 -1902 -1171 -505 89 609 1058 1442 1768 2041 2261 2429 2541 2591 2571 2470 2278 1981 1570 1039 

52.9 51.5 49.0 45.2 40.3 34.3 27.8 21.2 15.1 9.6 5.0 1.3 -1.5 -3.5 -4.6 -5.0 -4.6 -3.8 -2.9 

40 -1919 -1183 -524 52 547 966 1314 1594 1809 1958 2045 2071 2043 1961 1829 1641 1389 1060 639 

56.0 55.0 52.8 49.2 44.0 37.6 30.6 23.6 17.2 11.6 6.9 3.0 -0.2 -2.6 -4.3 -5.0 -4.9 -4.1 -3.0 

35 -2008 -1264 -609 -45 436 839 1169 1422 1592 1677 1680 1612 1491 1335 1160 973 770 537 249 

59.1 58.7 57.1 53.8 48.6 42.0 34.7 27.4 20.8 15.1 10.3 6.2 2.4 -0.9 -3.6 -5.4 -6.1 -5.7 -4.7 

30 -2173 -1417 -766 -211 263 667 997 1242 1385 1415 1337 1171 952 715 495 310 163 35 -106 

61.7 62.3 61.5 58.8 53.9 47.3 39.8 32.4 25.7 20.1 15.3 10.7 6.2 1.6 -2.7 -6.1 -8.0 -8.4 -7.9 

25 -2417 -1649 -1000 -451 26 443 792 1047 1176 1161 1007 746 430 116 -145 -321 -407 -421 -408 

63.7 65.3 65.6 63.9 59.6 53.2 45.7 38.2 31.6 26.0 21.1 16.2 10.7 4.6 -1.6 -6.9 -10.5 -12.2 -12.3 

20 -2743 -1964 -1319 -770 -280 165 548 826 951 898 674 325 -79 -461 -753 -912 -928 -826 -657 

64.6 67.4 69.2 68.6 65.3 59.4 52.0 44.4 37.7 32.1 27.1 21.7 15.2 7.4 -0.8 -8.2 -13.8 -16.8 -17.6 

15 -3154 -2372 -1727 -1169 -653 -165 263 571 696 607 318 -112 -593 -1029 -1338 -1470 -1412 -1192 -873 

64.5 68.5 71.9 72.9 70.7 65.4 58.1 50.3 43.3 37.4 32.0 26.1 18.6 9.4 -0.7 -10.2 -17.6 -22.0 -23.6 

10 -3647 -2869 -2221 -1641 -1083 -542 -64 272 393 265 -89 -593 -1139 -1615 -1929 -2025 -1890 -1556 -1094 

63.3 68.7 73.8 76.5 75.5 70.8 63.4 55.2 47.5 40.9 34.9 28.4 20.1 9.8 -1.8 -13.1 -22.1 -27.7 -29.9 

5 -4199 -3435 -2777 -2163 -1552 -953 -432 -81 21 -157 -579 -1152 -1752 -2255 -2564 -2619 -2408 -1967 -1373 

61.5 68.1 74.8 79.2 79.4 75.2 67.5 58.4 49.5 41.8 34.9 27.7 18.8 7.9 -4.6 -16.8 -26.9 -33.4 -36.0 

0 -4768 -4025 -3352 -2696 -2029 -1383 -839 -499 -442 -689 -1187 -1827 -2472 -2993 -3288 -3300 -3018 -2478 -1764 

59.4 67.1 75.2 81.0 82.1 78.0 69.6 59.2 48.7 39.5 31.5 23.7 14.6 3.7 -8.8 -21.2 -31.7 -38.5 -41.2 
(,) 

'() 

LONG 

LAT 

90 

IGRF 1980 EAST COMPONENT (Y) 

90 95 100 105 110 11 5 120 125 130 13 5 140 145 150 155 160 165 170 175 180 

1906 2016 2110 2189 2250 2295 2322 2331 2323 2297 2253 2193 2115 2022 1913 1789 1652 1503 1342 

-7.6 -9.4 -11.1 -12.8 -14.3 -15.8 -17.1 -18.3 -19.3 -20.2 -21.0 -21.5 -22.0 -22.2 -22.3 -22.2 -22.0 -21.6 -21.0 

85 2033 1930 1810 1681 1548 1417 1295 1186 1095 1024 976 951 949 969 1008 1062 1126 1195 1263 

-12.1 -13.7 -15.2 -16.5 -17.5 -18.3 -18.9 -19.3 -19.5 -19.6 -19.5 -19.3 -19.0 -18.6 -18.2 -17.7 -17.2 -16.6 -16.1 

80 2150 1846 1519 1183 852 539 259 23 -158 -278 -330 -314 -229 -82 123 374 662 971 1289 

-15.0 -16.6 -17.8 -18.7 -19.4 -19.7 -19.7 -19.5 -19.1 -18.5 -17.8 -17.0 -16.1 -15.2 -14.3 -13.5 -12.8 -12.2 -11.8 

75 2230 1749 1234 704 183 -305 -739 -1098 -1365 -1528 -1578 -1513 -1334 -1050 -673 -217 297 848 1413 

-16.1 -17.5 -18.6 -19.3 -19.6 -19.6 -19.3 -18.8 -18.0 -17.0 -15.9 -14.7 -13.5 -12.3 -11.1 -10.2 -9.4 -8.8 -8.5 

70 2244 1621 947 251 -436 -1080 -1649 -2115 -2454 -2647 -2684 -2561 -2284 -1863 -1317 -668 56 827 1613 

-15.4 -16.6 -17.4 -17.9 -18.1 -18.1 -17.7 -17.1 -16.3 -15.3 -14.1 -12.9 -11.6 -10.3 -9.1 -8.1 -7.2 -6.7 -6.5 

65 2173 1449 657 -168 -985 -1752 -2427 -2974 -3362 -3567 -3577 -3390 -3013 -2464 -1766 -950 -49 900 1862 

-13.2 -14.0 -14.6 -15.1 -15.3 -15.3 -15.2 -14.8 -14.2 -13.5 -12.6 -11.6 -10.6 -9.5 -8.4 -7.5 -6.6 -6.1 -5.8 

60 2007 1229 367 -538 -1439 -2288 -3033 -3630 -4040 -4238 -4209 -3954 -3483 -2820 -1996 -1049 -18 1057 2135 

-10.1 -10.5 -10.9 -11.3 -11.7 -12.0 -12.2 -12.3 -12.2 -11.9 -11.5 -11.0 -10.4 -9.7 -9.0 -8.3 -7.5 -6.8 -6.4 

55 1750 968 90 -841 -1777 -2662 -3438 -4052 -4462 -4636 -4559 -4234 -3678 -2920 -2000 -961 150 1292 2423 

-6.9 -6.9 -7.1 -7.6 -8.2 -8.9 -9.6 -10.1 -10.5 -10.6 -10.7 -10.7 -10.7 -10.6 -10.4 -10.0 -9.4 -8.5 -7.8 

50 1419 682 -158 -1062 -1981 -2856 -3625 -4229 -4617 -4754 -4625 -4234 -3603 -2771 -1783 -692 453 1606 2729 

-4.3 -4.0 -4.0 -4.6 -5.6 -6.8 -7.9 -8.9 -9.6 -9.9 -10.2 -10.5 -10.9 -11.4 -11.8 -12.0 -11.6 -10.7 -9.5 

45 1039 391 -360 -1186 -2040 -2865 -3594 -4162 -4512 -4604 -4422 -3971 -3280 -2392 -1364 -254 884 2002 3064 

-2.9 -2.3 -2.3 -3.1 -4.5 -6.3 -8.0 -9.2 -9.8 -10.0 -9.9 -10.1 -10.6 -11.5 -12.5 -13.2 -13.2 -12.4 -10.9 

40 639 118 -503 -1208 -1958 -2698 -3360 -3871 -4170 -4211 -3977 -3475 -2736 -1814 -769 333 1431 2477 3437 

-3.0 -2.3 -2.3 -3.4 -5.4 -7.8 -10.0 -11.3 -11.6 -10.9 -9.9 -9.2 -9.2 -10.1 -11.6 -13.0 -13.6 -13.1 -11.5 

35 249 -117 -578 -1130 -1746 -2376 -2949 -3387 -3624 -3611 -3327 -2783 -2014 -1074 -34 1037 2071 3018 3848 

-4.7 -4.0 -4.2 -5.7 -8.3 -11.4 -14.0 -15.3 -14.8 -12.8 -10.1 -7.8 -6.7 -7.1 -8.8 -10.7 -12.1 -12.1 -10.9 

30 -106 -300 -580 -962 -1428 -1931 -2400 -2755 -2921 -2850 -2521 -1945 -1160 -223 794 1815 2769 3603 4286 

-7.9 -7.3 -7.7 -9.6 -12.8 -16.6 -19.6 -20.6 -19.0 -15.3 -10.4 -5.9 -3.1 -2.5 -4.0 -6.3 -8.4 -9.3 -8.8 

25 -408 -423 -518 -722 -1032 -1403 -1762 -2025 -2116 -1985 -1613 -1016 -231 

-12.3 -11.9 -12.5 -14.6 -18.3 -22.6 -25.8 -26.5 -23.8 -18.0 -10.7 -3.7 1.3 

685 1660 2618 3483 4198 4733 

3.2 2.4 -0.2 -2.9 -4.7 -5.2 

20 -657 -495 -406 -438 -594 -835 -1085 -1255 -1268 -1077 -668 -58 713 1592 2511 3395 4169 4770 5166 

-17.6 -17.5 -18.0 -20.1 -24.0 -28.4 -31.6 -31.8 -28.0 -20.4 -10.8 -1.3 5.9 9.4 9.4 7.0 3.8 1.2 -0.5 

15 -873 -540 -278 -146 -158 -275 -420 -501 -440 -191 252 867 1614 2445 3299 4106 4791 5290 5569 

-23.6 -23.7 -23.9 -25.5 -29.0 -33.1 -35.9 -35.5 -30.7 -21.7 -10.3 1.2 10.2 15.2 16.2 14.3 11.0 7.7 4.9 

10 -1094 -602 -177 108 231 229 181 184 316 617 1090 1707 2427 3205 3991 4722 5328 5744 5932 

-29.9 -29.9 -29.5 -30.3 -32.6 -35.8 -37.8 -36.7 -31.2 -21.3 -8.8 3.7 13.9 20.1 22.0 20.6 17.5 14.0 10.4 

5 -1373 -732 -156 273 524 631 676 757 954 1305 1806 2425 3119 3849 4572 5235 5775 6129 6258 

-36.0 -35.7 -34.5 -33.9 -34.6 -36.2 -36.9 -34.9 -28.8 -18.8 -6.3 6.4 16.8 23.4 26.0 25.4 22.8 19.4 15.5 

0 -1764 -988 -271 296 673 891 1030 1189 1449 1848 2378 3003 3680 4372 5044 5653 6143 6456 6557 

-41.2 -40.6 -38.4 -36.1 -34.8 -34.3 -33.3 -30.1 -23.8 -14.2 -2.5 9.2 18.9 25.3 28.2 28.2 26.4 23.5 19.6 
~ 

0 

LONG 

LAT 

90 

IGRF 1980 EAST COMPONENT (Y) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 

1342 1170 990 803 609 410 209 6 -198 -399 -598 -792 

-21.0 -20.2 -19.4 -18.3 -17.1 -15.8 -14.4 -12.8 -11.2 -9.5 -7.7 -5.8 

-120 -115 -110 -105 -100 -95 -90 

-980 -1161 -1333 -1494 -1644 -1782 -1906 

-3.9 -2.0 o.o 1.9 3.8 5.7 7.6 

85 1263 1324 1372 1400 1404 1378 1319 1225 1093 923 716 475 202 -97 -419 -755 -1100 -1446 -1785 

-16.1 -15.5 -15.0 -14.4 -13.8 -13.2 -12.6 -11.9 -11.2 -10.3 -9.4 -8.4 -7.3 -6.0 -4.6 -3.1 -1.5 0.3 2.2 

80 1289 1599 1889 2144 2350 2497 2577 2582 2507 2353 2120 1812 1435 999 513 -10 -558 -1115 -1669 

-11.8 -11.5 -11.3 -11.3 -11.4 -11.6 -11.8 -12.0 -12.2 -12.3 -12.3 -12.0 -11.6 -11.0 -10.0 -8.8 -7.4 -5.6 -3.7 

75 1413 1969 2492 2962 3358 3665 3868 3958 3929 3780 3511 3130 2647 2073 1424 719 -24 -784 -1540 

-8.5 -8.5 -8.7 -9.3 -10.1 -11.1 -12.1 -13.3 -14.4 -15.3 -16.1 -16.6 -16.7 -16.5 -15.9 -14.9 -13.5 -11.7 -9.4 

70 1613 2385 3112 3767 4325 4765 5072 5232 5239 5091 4791 4347 3771 3079 2290 1425 509 -433 -1373 

-6.5 -6.7 -7.3 -8.3 -9.7 -11.4 -13.3 -15.4 -17.3 -19.1 -20.6 -21.6 -22.2 -22.4 -21.9 -21.0 -19.5 -17.5 -15.0 

65 1862 2800 3682 4476 5155 5696 6080 6295 6333 6192 5876 5393 4756 3980 3088 2101 1047 -45 -1144 

-5.8 -6.0 -6.8 -8.1 -9.9 -12.3 -15.0 -17.8 -20.6 -23.1 -25.2 -26.8 -27.7 -28.1 -27.8 -26.9 -25.3 -23.2 -20.5 

60 2135 3179 4156 5034 5785 6387 6822 7076 7142 7019 6707 6217 5558 4746 3799 2739 1592 387 -841 

-6.4 -6.3 -6.9 -8.3 -10.4 -13.2 -16.6 -20.2 -23.7 -26.9 -29.5 -31.5 -32.7 -33.2 -33.0 -32.3 -30.9 -28.8 -26.0 

55 2423 3508 4515 5417 6190 6813 7269 7547 7639 7541 7257 6791 6152 5351 4401 3318 2126 850 -473 

-7.8 -7.3 -7.4 -8.5 -10.7 -13.8 -17.7 -22.0 -26.2 -29.9 -32.9 -35.1 -36.4 -37.1 -37.3 -36.9 -36.0 -34.3 -31.7 

so 2729 3791 4767 5636 6380 6985 7435 7720 7832 7768 7526 7111 6526 5777 4870 3814 2623 1320 -62 

-9.5 -8.4 -7.9 -8.6 -10.6 -13.9 -18.3 -23.0 -27.7 -31.7 -34.8 -37.0 -38.4 -39.4 -40.0 -40.5 -40.5 -39.8 -37.9 

45 3064 4048 4936 5720 6393 6943 7362 7639 7764 7733 7543 7194 6686 6019 5191 4200 3052 1763 362 

-10.9 -9.3 -8.2 -8.4 -10.2 -13.6 -18.2 -23.3 -28.1 -32.0 -34.8 -36.7 -38.1 -39.3 -40.8 -42.5 -44.1 -44.9 -44.3 

40 3437 4297 5054 5711 6275 6743 7109 7363 7493 7490 7351 7073 6654 6085 5358 4462 3392 2155 773 

-11.5 -9.6 -8.1 -7.9 -9.7 -13.2 -18.0 -23.0 -27.5 -30.7 -32.7 -33.9 -35.0 -36.6 -39.3 -42.7 -46.4 -49.4 -50.7 

35 3848 4553 5146 5647 6075 6440 6739 6958 7083 7102 7007 6796 6463 5998 5385 4603 3638 2485 1158 

-10.9 -9.0 -7.5 -7.5 -9.3 -13.1 -17.8 -22.5 -26.0 -27.9 -28.5 -28.5 -29.1 -31.2 -35.3 -41.0 -47.3 -53.0 -56.5 

30 4286 4820 5232 5559 5838 6088 6310 6487 6598 6628 6568 6414 6162 5799 5304 4648 3805 2761 1518 

-8.8 -7.5 -6.6 -7.0 -9.4 -13.4 -18.0 -21.9 -23.9 -23.8 -22.2 -20.6 -20.6 -23.3 -29.1 -37.5 -46.8 -55.3 -61.3 

25 4733 5095 5324 5476 5603 5736 5877 6008 6099 6130 6091 5982 5801 5534 5157 4632 3923 3003 1865 

-5.2 -5.0 -5.2 -6.7 -9.9 -14.4 -18.6 -21.2 -21.1 -18.4 -14.3 -10.9 -10.2 -13.7 -21.5 -32.6 -45.0 -56.4 -64.8 

20 5166 5369 5430 5419 5405 5428 5493 5575 5639 5662 5633 5556 5434 5256 4992 4598 4026 3236 2211 

-0.5 -1.7 -3.3 -6.3 -10.7 -15.6 -19.4 -20.4 -17.9 -12.2 -5.5 -0.2 1.0 -3.4 -13.4 -27.3 -42.6 -56.5 -66.9 

15 5569 5640 5559 5412 5279 5207 5203 5237 5271 5275 5244 5186 5111 5010 4850 4580 4140 3479 2566 

4.9 2.3 -1.0 -5.7 -11.3 -16.7 -19.9 -19.2 -14.1 -5.6 3.7 10.5 11.8 6.2 -6.0 -22.5 -40.1 -55.9 -67.8 

10 5932 5905 5723 5476 5253 5108 5046 5036 5036 5015 4970 4918 4874 4833 4763 4602 4281 3738 2930 

10.4 6.5 1.6 -4.6 -11.4 -17.2 -19.7 -17.4 -9.9 1.0 12.3 20.0 20.9 13.9 -0.3 -18.9 -38.3 -55.2 -67.8 

5 6258 6172 5931 5627 5350 5156 5051 5003 4966 4913 4845 4784 4754 4754 4750 4677 4456 4013 3297 

15.5 10.7 4.5 -2.9 -10.6 -16.6 -18.5 -14.8 -5.5 7.1 19.4 27.3 27.4 18.8 2.9 -17.2 -37.5 -54.6 -67.0 

0 6557 6451 6193 5872 5575 5358 5225 5146 5075 4987 4888 4806 4771 4787 4823 4810 4664 4302 3663 

19.6 14.4 7.5 -0.7 -8.9 -14.8 -16.1 -11.5 -1.2 12.1 24.5 31.7 30.6 20.6 3.3 -17.4 -37.6 -54.1 -65.7 
J:o. 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

so 

IGRF 1980 EAST COMPONENT (Y} 

-90 -85 -80 -75 -70 -65 -60 -55 -so -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

-1906 -2016 -2110 -2189 -2250 -2295 -2322 -2331 -2323 -2297 -2253 -2193 -2115 -2022 -1913 -1789 -1652 -1503 -1342 

7.6 9.4 11.1 12.8 14.3 15.8 17.1 18.3 19.3 20.2 21.0 21.5 22.0 22.2 22.3 22.2 22.0 21.6 21.0 

-1785 -2111 -2415 -2692 -2935 -3137 -3296 -3407 -3467 -3475 -3431 -3336 -3191 -3000 -2766 -2494 -2189 -1856 -1503 

2.2 4.1 6.2 8.3 10.4 12.5 14.6 16.7 18.6 20.4 22.0 23.5 24.7 25.6 26.3 26.7 26.8 26.6 26.0 

-1669 -2204 -2708 -3168 -3573 -3914 -4183 -4375 -4485 -4514 -4461 -4329 -4123 -3847 -3510 -3118 -2680 -2206 -1706 

-3.7 -1.4 1.0 3.6 6.4 9.2 12.1 15.0 17.7 20.4 22.9 25.1 27.1 28.7 30.0 30.9 31.3 31.3 30.8 

-1540 -2272 -2961 -3589 -4139 -4599 -4960 -5214 -5359 -5394 -5322 -5148 -4882 -4530 -4105 -3618 -3080 -2503 -1899 

-9.4 -6.9 -4.0 -0.8 2.6 6.2 9.9 13.6 17.2 20.7 23.9 26.9 29.5 31.7 33.4 34.6 35.3 35.5 35.1 

-1373 -2285 -3144 -3926 -4609 -5176 -5616 -5919 -6085 -6114 -6013 -5792 -5463 -5041 -4539 -3973 -3358 -2708 -2036 

-15.0 -12.0 -8.6 -4.8 -0.6 3.8 8.3 12.9 17.3 21.5 25.5 29.0 32.1 34.7 36.7 38.1 39.0 39.2 38.7 

-1144 -2217 -3232 -4158 -4967 -5636 -6148 -6494 -6672 -6687 -6550 -6276 -5883 -5391 -4819 -4186 -3511 -2809 -2095 

-20.5 -17.1 -13.1 -8.5 -3.4 1.9 7.5 13.0 18.4 23.4 27.9 31.9 35.2 37.9 40.0 41.4 42.2 42.4 41.8 

-841 -2054 -3213 -4277 -5209 -5978 -6563 -6949 -7136 -7132 -6954 -6624 -6167 -5609 -4973 -4282 -3558 -2818 -2078 

-26.0 -22.3 -17.7 -12.3 -6.3 0.3 7.2 13.9 20.4 26.2 31.3 35.6 39.0 41.6 43.5 44.7 45.3 45.3 44.5 

-473 -1802 -3088 -4283 -5337 -6209 -6867 -7296 -7493 -7470 -7252 -6868 -6351 -5733 -5041 -4303 -3539 -2771 -2014 

-31.7 -28.0 -23.1 -16.9 -9.6 -1.6 6.8 15.1 22.8 29.6 35.3 39.8 43.2 45.5 47.1 47.9 48.3 48.0 47.2 

-62 -1477 -2872 -4186 -5357 -6332 -7069 -7545 -7758 -7724 -7473 -7044 -6478 -5810 -5075 -4298 -3503 -2712 -1943 

-37.9 -34.5 -29.4 -22.5 -14.0 -4.4 5.7 15.6 24.8 32.8 39.3 44.1 47.4 49.5 50.6 51.1 51.1 50.8 49.9 

45 362 -1107 -2583 -3998 -5278 -6355 -7175 -7709 -7951 -7920 -7653 -7197 -6597 -5895 -5126 -4318 -3496 -2683 -1902 

-44.3 -41.8 -36.8 -29.4 -20.0 -8.9 2.8 14.5 25.4 34.7 42.2 47.5 51.0 52.9 53.7 54.0 53.9 53.6 52.9 

40 773 -712 -2239 -3731 -5105 -6280 -7191 -7798 -8091 -8090 -7834 -7375 -6762 -6040 -5245 -4407 -3555 -2717 -1919 

-50.7 -49.4 -45.0 -37.6 -27.6 -15.5 -2.4 10.9 23.4 34.3 43.0 49.3 53.3 55.4 56.3 56.4 56.4 56.3 56.0 

35 1158 -307 -1851 -3394 -4846 -6116 -7126 -7827 -8202 -8265 -8055 -7623 -7019 -6289 -5469 -4595 -3703 -2830 -2008 

-56.5 -56.9 -53.6 -46.7 -36.7 -24.3 -10.4 4.0 18.0 30.5 41.0 48.8 53.9 56.8 57.9 58.3 58.5 58.8 59.1 

30 1518 105 -1426 -2995 -4509 -5870 -6991 -7810 -8299 -8465 -8339 -7967 -7394 -6663 -5815 -4894 -3947 -3026 -2173 

-61.3 -63.6 -61.8 -56.1 -46.9 -35.1 -21.2 -6.3 8.9 23.3 35.8 45.8 52.7 56.7 58.7 59.4 60.0 60.8 61.7 

25 1865 525 -969 -2545 -4110 -5560 -6801 -7759 -8392 -8696 -8689 -8404 -7879 -7155 -6275 -5296 -4283 -3305 -2417 

-64.8 -69.1 -69.1 -65.0 -57.5 -47.1 -34.2 -19.4 -3.4 12.8 27.9 40.5 49.8 55.5 58.5 59.7 60.6 61.9 63.7 

20 2211 957 -488 -2059 -3666 -5202 -6567 -7676 -8474 -8939 -9073 -8896 -8434 -7724 -6814 -5777 -4697 -3664 -2743 

-66.9 -73.0 -74.7 -72.6 -67.4 -59.3 -48.3 -34.3 -17.8 0.2 18.0 33.7 45.7 53.5 57.5 59.3 60.4 62.1 64.6 

15 2566 1399 6 -1555 -3197 -4814 -6299 -7558 -8522 -9153 -9437 -9376 -8986 -8300 -7375 -6296 -5167 -4095 -3154 

-67.8 -75.2 -78.5 -78.5 -75.9 -70.6 -62.0 -49.4 -32.7 -13.0 7.5 26.3 41.2 51.0 56.1 58.1 59.3 61.2 64.5 

10 2930 1844 500 -1048 -2718 -4405 -5996 -7390 -8504 -9288 -9710 -9761 -9450 -8805 -7891 -6804 -5664 -4585 -3647 

-67.8 -75.8 -80.2 -82.1 -82.2 -79.9 -73.9 -62.9 -46.3 -25.3 -2.2 19.5 37.0 48.5 54.4 56.5 57.4 59.3 63.3 

5 3297 2284 987 -547 -2236 -3976 -5651 -7151 -8386 -9291 -9829 -9980 -9748 -9165 -8299 -7253 -6151 -5109 -4199 

-67.0 -75.0 -80.0 -83.4 -85.8 -86.2 -82.7 -73.3 -57.1 -35.0 -10.0 14.1 33.6 46.4 52.7 54.5 55.0 56.9 61.5 

0 3663 2715 1462 -51 -1748 -3521 -5251 -6823 -8140 -9131 -9752 -9985 -9833 -9332 -8553 -7599 -6587 -5623 -4768 

-65.7 -73.1 -78.2 -82.5 -86.6 -89.2 -87.7 -79.7 -63.9 -41.2 -14.9 10.6 31.3 44.8 51.2 52.6 52.6 54.4 59.4 
IGRF 1980 EAST COMPONENT (Y) 

LONG 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

LAT 

0 -4768 -4025 -3352 -2696 -2029 -1383 -839 -499 -442 -689 -1187 -1827 -2472 -2993 -3288 -3300 -3018 -2478 -1764 

59.4 67.1 75.2 81.0 82. 1 78.0 69.6 59.2 48.7 39.5 31.5 23.7 14.6 3.7 -8.8 -21.2 -31.7 -38.5 -41.2 

-5 -5291 -4575 -3888 -3191 -2483 -1815 -1284 -995 -1018 -1357 -1941 -2648 -3332 -3862 -4140 -4109 -3761 -3136 -2315 

57.6 66.0 75.1 81.6 83.1 78.6 69.2 57.1 44.8 33.9 24.8 16.5 7.7 -2.5 -14.0 -25.7 -35.7 -42.4 -45.0 

-10 -5704 -5019 -4324 -3604 -2885 -2239 -1771 -1581 -1722 -2177 -2859 -3632 -4350 -4883 -5140 -5068 -4664 -3965 -3054 

56.6 65.2 74.4 80.8 82.0 76.7 65.9 52.0 37.8 25.3 15.2 6.9 -1.1 -9.8 -19.5 -29.6 -38.4 -44.4 -46.7 

-15 -5953 -5304 -4620 -3911 -3228 -2659 -2310 -2266 -2560 -3151 -3936 -4773 -5519 -6051 -6285 -6177 -5724 -4965 -3980 

56.6 64.6 73.1 78.6 78.5 71.8 59.5 44.0 28.2 14.5 3.9 -4.0 -10.5 -17.0 -24.2 -31.9 -38.8 -43.8 -45.7 

-20 -6020 -5418 -4773 -4119 -3528 -3094 -2915 -3056 -3525 -4260 -5147 -6043 -6810 -7336 -7547 -7407 -6916 -6112 -5069 

57.5 64.4 71.0 74.6 72.5 64.1 50.2 33.4 16.6 2.4 -8.0 -14.9 -19.4 -23.2 -27.3 -32.1 -36.8 -40.5 -41.9 

-25 -5926 -5387 -4817 -4270 -3825 -3575 -3603 -3949 -4598 -5472 -6449 -7392 -8171 -8688 -8879 -8714 -8196 -7361 -6277 

59.1 64.1 68.2 69.0 64.4 54.0 38.7 21.2 4.2 -9.7 -19.2 -24.4 -26.6 -27.4 -28.2 -30.0 -32.3 -34.6 -35.8 

-30 -5727 -5277 -4823 -4428 -4172 -4138 -4387 -4937 -5751 -6742 -7788 -8761 -9543-10049-10222-10040 -9509 -8659 -7551 

60.9 63.5 64.5 62.1 54.8 42.4 26.2 8.6 -7.8 -20.6 -28.5 -31.7 -31.3 -29.2 -27.0 -25.9 -26.1 -27.1 -28.1 

-35 -5503 -5171 -4869 -4662 -4621 -4811 -5272 -6001 -6948 -8023 -9110-10092-10867-11359-11521-11333-10799 -9950 -8835 

62.3 62.3 60.1 54.4 44.5 30.6 14.0 -3.0 -18.0 -29.1 -35.1 -36.1 -33.5 -28.9 -24.2 -20.8 -19.1 -19.1 -20.1 

~ -40 -5329 -5146 -5026 -5025 -5203 -5605 -6249 -7118 -8155 -9274-10370-11341-12097-12574-12728-12542-12020-11184-10079 ....., 62.7 60.3 55.1 46.6 34.6 19.8 3.5 -12.2 -25.5 -34.5 -38.5 -37.7 -33.4 -27.1 -20.7 -15.7 -12.8 -12.1 -13.1 

-45 -5258 -5251 -5329 -5538 -5921 -6504 -7291 -8254 -9336-10460-11536-12475-13202-13658-13807-13631-13129-12320-11239 

61.7 57.2 49.8 39.4 26.3 11.3 -4.1 -18.2 -29.4 -36.5 -38.8 -36.9 -31.6 -24.6 -17.6 -11.9 -8.4 -7.3 -8.4 

-50 -5310 -5497 -5777 -6184 -6746 -7474 -8360 -9373-10461-11558-12587-13476-14162-14593-14735-14570-14095-13323-12281 

58.9 53.2 44.6 33.3 20. 1 5.8 -8.1 -20.4 -29.7 -35.2 -36.6 -34.1 -28.9 -22.2 -15.5 -10.1 -6.6 -5.6 -6.6 

-55 -5470 -5859 -6335 -6920 -7630 -8465 -9411-10439-11502-12546-13510-14335-14967-15364-15493-15338-14892-14163-13172 

54.3 48.3 39.5 28.5 16.2 3.4 -8.8 -19.2 -26.9 -31.3 -32.3 -30.3 -26.0 -20.6 -15.1 -10.6 -7.7 -6.8 -7.8 

-60 -5704 -6293 -6950 -7689 -8516 -9426-10402-11417-12434-13409-14293-15041-15609-15961-16070-15917-15498-14816-13887 

48.2 42.6 34.7 25.0 14.3 3.4 -6.8 -15.4 -21.8 -25.7 -27.0 -26.0 -23.3 -19.7 -16.0 -12.8 -10.9 -10.3 -11.1 

-65 -5976 -6751 -7569 -8437 -9354-10312-11295-12280-13237-14131-14927-15589-16082-16379-16456-16300-15903-15269-14408 

41.0 36.3 29.8 22.0 13.5 4.8 -3.3 -10.4 -15.9 -19.6 -21.5 -21.8 -20.9 -19.3 -17.4 -15.9 -14.9 -14.7 -15.3 

-70 -6259 -7199 -8154 -9125-10107-11092-12065-13006-13894-14702-15403-15972-16384-16617-16655-16487-16107-15518-14727 

33.0 29.6 24.8 19 .1 12.7 6.3 o.o -5.6 -10.2 -13.9 -16.4 -17.9 -18.6 -18.7 -18.5 -18.3 -18.2 -18.4 -18.8 

-75 -6544 -7619 -8681 -9728-10753-11746-12694-13582-14395-15113-15718-16192-16520-16686-16679-16494-16125-15576-14852 

24.6 22.4 19.2 15.4 11. 1 6.6 2.1 -2.2 -6.0 -9.4 -12.2 -14.4 -16.1 -17.4 -18.3 -19.0 -19.5 -19.9 -20.2 

-80 -6836 -8007 -9142-10235-11277-12259-13170-13999-14734-15364-15876-16261-16507-16607-16556-16350-15987-15471-14805 

16.2 14.9 13.0 10.7 8.0 5. 1 2.1 -0.9 -3.8 -6.5 -9.0 -11.3 -13.2 -14.9 -16.2 -17.2 -18.0 -18.5 -18.7 

-85 -7142 -8363 -9530-10635-11668-12620-13484-14251-14912-15461-15891-16196-16372-16415-16323-16096-15734-15240-14618 

8.0 7.2 6.1 4.8 3.3 1.7 0.0 -1.7 -3.5 -5.2 -6.9 -8.5 -9.9 -11.1 -12.2 -13.0 -13.6 -14.0 -14.2 

-90 -7464 -8684 -9839-10918-11915-12820-13629-14333-14929-15410-15775-16019-16142-16142-16019-15773-15408-14926-14330 

0.2 -0.4 -1.1 -1.7 -2.3 -2.9 -3.5 -4.1 -4.6 -5.1 -5.5 -5.9 -6.3 -6.6 -6.8 -7.1 -7.2 -7.3 -7.4 
~ 

(..) 

IGRF 1980 EAST COMPONENT (Y) 

LONG 90 95 100 105 11 0 115 120 125 130 135 140 145 150 155 160 165 170 175 180 

LAT 

0 -1764 -988 -271 296 673 891 1030 1189 1449 1848 2378 3003 3680 4372 5044 5653 6143 6456 6557 

-41.2 -40.6 -38.4 -36.1 -34.8 -34.3 -33.3 -30.1 -23.8 -14.2 -2.5 9.2 18.9 25.3 28.2 28.2 26.4 23.5 19.6 

-5 -2315 -1418 -567 135 643 979 1220 1464 1792 2241 2804 3442 4114 4784 5421 5992 6450 6745 6843 

-45.0 -44.0 -40.7 -36.8 -33.4 -30.5 -27.6 -23.3 -16.8 -8.0 2.1 12.0 20.3 25.8 28.6 29.1 28.1 25.9 22.5 

-10 -3054 -2047 -1073 -235 411 881 1241 1584 1990 2496 3097 3758 4438 5101 5722 6273 6717 7011 7128 

-46.7 -45.3 -41.3 -36.1 -30.7 -25.7 -20.8 -15.4 -8.9 -1.2 7.1 14.9 21.2 25.5 27.9 28.7 28.4 27.0 24.3 

-15 -3980 -2880 -1790 -818 -23 597 1097 1560 2059 2634 3282 3975 4672 5344 5966 6514 6959 7268 7417 

-45.7 -44.2 -40.0 -34.0 -27.4 -20.8 -14.4 -8.0 -1.5 5.2 11.7 17.3 21.8 24.8 26.6 27.5 27.7 27.1 25.0 

-20 -5069 -3891 -2698 -1593 -642 144 806 1411 2023 2680 3385 4115 4840 5531 6165 6723 7183 7516 7706 

-41.9 -40.7 -36.8 -30.9 -23.9 -16.5 -9.3 -2.3 4.1 10.0 15.1 19.1 22.0 24.0 25.3 26.3 26.9 26.7 25.1 

-25 -6277 -5039 -3754 -2524 -1415 -451 389 1155 1898 2652 3424 4200 4958 5673 6329 6907 7388 7752 7986 

-35.8 -35.1 -32.1 -27.2 -20.8 -13.7 -6.3 0.7 7.0 12.4 16.7 19.8 22.0 23.5 24.6 25.6 26.3 26.3 25.0 

-30 -7551 -6269 -4909 -3564 -2303 -1161 -134 806 1694 2558 3408 4238 5033 5779 6459 7061 7568 7966 8242 

-28.1 -28.1 -26.6 -23.3 -18.4 -12.4 -5.8 0.9 6.9 12.1 16.3 19.3 21.5 23.1 24.4 25.6 26.4 26.4 25.0 

-35 -8835 -7527 -6110 -4667 -3269 -1959 -749 366 1408 2392 3331 4223 5064 5843 6552 7180 7715 8144 8461 

-20.1 -21.0 -21.1 -19.8 -17.0 -12.7 -7.3 -1.5 4.2 9.4 13.9 17.5 20.4 22.8 24.7 26.3 27.2 27.1 25.4 

-40 -10079 -8763 -7310 -5795 -4284 -2827 -1452 -170 1023 2135 3172 4138 5033 5854 6596 7253 7817 8279 8635 

-13.1 -14.9 -16.5 -17.2 -16.4 -14.1 -10.3 -5.6 -0.3 5.1 10.2 14.8 18.8 22.2 25.1 27.2 28.4 28.1 26.3 

-45 -11239 -9936 -8471 -6912 -5321 -3750 -2240 -812 521 1758 2901 3952 4913 5786 6570 7264 7863 8362 8760 

-8.4 -10.8 -13.5 -15.7 -16.7 -16.1 -13.8 -10.1 -5.3 0.1 5.9 11.5 16.7 21.4 25.2 28.0 29.4 29.3 27.3 

-so -12281-11oo9 -9560 -7990 -6358 -4716 -3109 -1568 -116 1237 2485 3628 4668 5607 6448 7191 7837 8385 8837 

-6.6 -9.2 -12.4 -15.5 -17.6 -18.1 -17.0 -14.1 -9.8 -4.3 1.8 8.2 14.4 20.0 24.7 28.1 30.0 30.1 28.3 

-55 -13172-11952-10545 -9001 -7370 -5704 -4045 -2432 -892 556 1901 3138 4266 5285 6199 7011 7723 8338 8863 

-7.8 -10.2 -13.3 -16.4 -18.7 -19.7 -19.1 -16.8 -12.8 -7.5 -1.3 5.4 12.0 18.2 23.4 27.2 29.5 30.0 28.7 

-60 -13887-12736-11398 -9914 -8326 -6681 -5020 -3379 -1790 -275 1149 2472 3689 4799 5803 6704 7506 8214 8836 

-11.1 -13.0 -15.5 -17.9 -19.8 -20.5 -19.9 -17.7 -14.1 -9.1 -3.2 3.3 9.8 15.9 21.2 25.3 27.9 28.9 28.2 

-65 -14408-13340-12092-10696 -9188 -7606 -5987 -4364 -2767 -1221 256 1649 2950 4154 5260 6267 7181 8006 8749 

-15.3 -16.5 -18.0 -19.5 -20.4 -20.4 -19.4 -17.2 -13.7 -9.2 -3.8 2.0 7.9 13.5 18.4 22.4 25.1 26.5 26.5 

-70 -14727-13749-12604-11317 -9916 -8430 -6889 -5323 -3757 -2214 -715 725 2095 3386 4595 5719 6758 7716 8596 

-18.8 -19.4 -19.9 -20.3 -20.2 -19.5 -17.9 -15.5 -12.3 -8.3 -3.7 1.2 6.1 10.9 15.1 18.6 21.3 22.9 23.5 

-75 -14852-13964-12926-11755-10473 -9102 -7663 -6180 -4675 -3167 -1675 -214 1203 2566 3867 5101 6265 7357 8377 

-20.2 -20.3 -20.2 -19.7 -18.9 -17.6 -15.7 -13.3 -10.4 -7.1 -3.4 0.4 4.3 8.0 11.4 14.3 16.6 18.2 19.1 

-80 -14805-13997-13057-11998-10833 -9578 -8249 -6862 -5435 -3983 -2521 -1065 374 1784 3156 4480 5749 6958 8103 

-18.7 -18.6 -18.1 -17.4 -16.3 -14.9 -13.1 -11.0 -8.7 -6.1 -3.4 -0.6 2.2 4.8 7.3 9.4 11.2 12.6 13.6 

-85 -14618-13874-13013-12046-10980 -9827 -8597 -7303 -5956 -4569 -3153 -1723 -288 1139 2546 3925 5265 6556 7790 

-14.2 -14.0 -13.7 -13.1 -12.3 -11.3 -10.1 -8.7 -7.2 -5.6 -3.9 -2.2 -0.5 1.1 2.6 4.0 5.2 6.2 7.1 

-90 -14330-13625-12816-11910-10913 -9833 -8678 -7458 -6180 -4855 -3494 -2106 -701 708 2112 3500 4862 6186 7464 

-7.4 -7.3 -7.3 -7.1 -7.0 -6.7 -6.5 -6.1 -5.8 -5.3 -4.9 -4.4 -3.8 -3.3 -2.7 -2.1 -1.5 -0.8 -0.2 
t 

IGRF 1980 EAST COMPONENT (Y) 

LONG 180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

LAT 

0 6557 6451 6193 5872 5575 5358 5225 5146 5075 4987 4888 4806 4771 4787 4823 4810 4664 4302 3663 

19.6 14.4 7.5 -0.7 -8.9 -14.8 -16.1 -11.5 -1.2 12.1 24.5 31.7 30.6 20.6 3.3 -17.4 -37.6 -54.1 -65.7 

-5 6843 6748 6510 6207 5921 5703 5557 5454 5354 5232 5099 4988 4932 4942 4988 5006 4909 4608 4033 

22.5 17.4 10.4 2.0 -6.3 -12.0 -12.9 -7.8 2.6 15.6 27.1 33.0 30.5 19.3 1.5 -19.1 -38.4 -53.6 -63.8 

-10 7128 7069 6875 6616 6363 6160 6014 5896 5773 5624 5462 5320 5235 5221 5256 5279 5206 4946 4422 

24.3 19.6 12.9 4.7 -3.3 -8.7 -9.4 -4.4 5.3 17.1 27.0 31.2 27.4 15.6 -1.9 -21.4 -39.1 -52.6 -61.2 

-15 7417 7408 7274 7073 6865 6688 6549 6425 6289 6126 5946 5782 5670 5628 5638 5649 5581 5344 4858 

2s.o 20.9 14.7 7.o -0.4 -5.4 -6.2 -1.9 6.6 16.5 24.5 27.0 22.4 10.1 -5.7 -23.4 -39.0 -so.s -57.7 

-20 7706 7754 7685 7546 7386 7240 7114 6993 6858 6695 6516 6348 6224 6161 6148 6139 6063 5833 5369 

25.1 21.5 15.9 8.8 2.0 -2.8 -3.8 -0.5 6.2 14.1 20.0 21.3 16.3 5.5 -9.0 -24.2 -37.5 -47.0 -53.0 

-25 7986 8089 8083 8004 7892 7777 7670 7563 7442 7300 7145 6998 6886 6822 6795 6768 6676 6439 5979 

2s.o 21.7 16.5 9.9 3.5 -1.1 -2.6 -o.s 4.4 10.3 14.5 14.9 10.3 1.1 -10.9 -23.4 -34.2 -42.2 -47.4 

-30 8242 8397 8449 8424 8358 8278 8196 8114 8024 7924 7818 7719 7645 7601 7578 7539 7427 7169 6694 

25.0 21.8 16.7 10.5 4.4 -0.3 -2.4 -1.6 1.7 5.7 8.6 8.7 5.1 -2.0 -11.2 -21.0 -29.6 -36.3 -41.2 

-35 8461 8664 8769 8797 8778 8737 8692 8649 8609 8569 8532 8503 8488 8485 8479 8434 8297 8007 7498 

25.4 22.0 17.0 10.9 4.8 -0.1 -2.8 -3.1 -1.4 1.2 3.3 3.5 1.1 -3.7 -10.3 -17.5 -24.3 -30.1 -35.0 

-40 8635 8885 9042 9124 9159 9169 9175 9188 9211 9246 9291 9344 9399 9446 9462 9412 9247 8914 8359 

26.3 22.7 17.5 11.4 5.4 0.3 -3.1 -4.4 -3.9 -2.4 -0.9 -0.4 -1.6 -4.5 -8.8 -13.9 -19.2 -24.4 -29.5 

-45 8760 9061 9275 9421 9521 9598 9671 9754 9854 9971 10099 10231 10353 10445 10478 10417 10218 9837 9234 

27.3 23.7 18.5 12.6 6.5 1.3 -2.6 -4.7 -5.2 -4.5 -3.5 -2.9 -3.2 -4.7 -7.4 -11.0 -15.4 -20.2 -25.4 

-so 8837 9199 9483 9706 9886 10045 10201 10366 10548 10744 10947 11144 11314 11433 11470 11388 111s1 10723 10076 

28.3 24.8 20.0 14.3 8.5 3.3 -o.8 -3.5 -4.8 -s.o -4.6 -4.1 -4.1 -s.o -6.7 -9.5 -13.2 -17.7 -22.9 

-55 8863 9305 9677 9993 10270 10525 10774 11027 11287 11551 11811 12048 12242 12365 12385 12273 11995 11527 10851 

28.7 25.8 21.6 16.5 11.2 6.3 2.1 -1.0 -3.0 -3.9 -4.3 -4.4 -4.7 -5.5 -7.0 -9.5 -12.8 -17.0 -21.7 

-60 8836 9381 9860 10286 10673 11034 11380 11717 12046 12363 12656 12908 13098 13200 13189 13037 12722 12227 11541 

28.2 26.1 22.8 18.6 14.1 9.7 5.7 2.5 o.o -1.8 -3.0 -3.9 -4.9 -6.2 -7.9 -10.4 -13.5 -17.1 -21.2 

-65 8749 9418 10022 10573 11079 11549 11989 12402 12787 13137 13442 13687 13852 13919 13866 13675 13329 12820 12144 

26.5 25.3 23.0 20.0 16.4 12.8 9.2 6.0 3.2 0.8 -1.2 -3.0 -4.8 -6.6 -8.8 -11.3 -14.1 -17.2 -20.4 

-70 8596 9404 10146 10827 11454 12031 12559 13038 13466 13835 14138 14362 14494 14519 14425 14200 13835 13325 12672 

23.5 23.1 21.8 19.8 17.3 14.5 11.6 8.6 5.8 3.2 0.7 -1.7 -4.1 -6.4 -8.8 -11.2 -13.7 -16.1 -18.3 

-75 8377 9326 10205 11016 11759 12435 13042 13579 14042 14426 14723 14926 15028 15019 14893 14645 14270 13769 131~4 

19.1 19.3 18.8 17.8 16.2 14.3 12.1 9.7 7.3 4.8 2.3 -0.2 -2.6 -4.9 -7.2 -9.3 -11.2 -12.9 -14.2 

-80 8103 9178 10180 11106 11953 12719 13399 13990 14488 14890 15190 15385 15470 15443 15301 15042 14667 14178 13577 

13.6 14.1 14.1 13.8 13.1 12.0 10.6 9.0 7.3 5.4 3.5 1.6 -0.3 -2.1 -3.8 -5.2 -6.5 -7.4 -8.1 

-85 7790 8960 10058 11076 12010 12853 13599 14245 14786 15219 15540 15747 15839 15815 15674 15417 15046 14564 13975 

7.1 7.7 8.0 8.2 8.1 7.9 7.4 6.9 6.2 5.4 4.5 3.6 2.7 1.9 1.2 o.s o.o -0.3 -0.5 

-90 7464 8684 9839 10918 11915 12820 13629 14333 14929 15410 15775 16019 16142 16142 16019 15773 15408 14926 14330 

-0.2 0.4 1.1 1.7 2.3 2.9 3.5 4.1 4.6 5.1 s.s 5.9 6.3 6.6 6.8 7.1 7.2 7.3 7.4 
.a=.. 

01 

IGRF 1980 EAST COMPONENT (Y) 

LONG -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

LAT 

0 3663 2715 1462 -51 -1748 -3521 -5251 -6823 -8140 -9131 -9752 -9985 -9833 -9332 -8553 -7599 -6587 -5623 -4768 

-65.7 -73.1 -78.2 -82.5 -86.6 -89.2 -87.7 -79.7 -63.9 -41.2 -14.9 10.6 31.3 44.8 51.2 52.6 52.6 54.4 59.4 

-5 4033 3143 1936 450 -1240 -3025 -4784 -6395 -7757 -8798 -9473 -9768 -9694 -9291 -8631 -7809 -6928 -6074 -5291 

-63.8 -70.3 -75.0 -79.7 -84.9 -88.8 -88.7 -81.7 -66.4 -43.7 -17.0 9.1 30.2 43.8 49.9 51.0 50.7 52.3 57.6 

-10 4422 3585 2425 973 -697 -2477 -4242 -5867 -7247 -8310 -9015 -9357 -9357 -9060 -8535 -7867 -7137 -6407 -5704 

-61.2 -66.5 -70.7 -75.5 -81.0 -85.6 -86.1 -79.8 -65.0 -42.8 -16.6 9.1 29.9 43.2 49.1 49.9 49.5 51.2 56.6 

-15 4858 4066 2950 1536 -107 -1870 -3627 -5250 -6632 -7702 -8426 -8806 -8873 -8679 -8289 -7772 -7189 -6579 -5953 

-57.7 -62.0 -65.7 -70.3 -75.7 -80.3 -80.9 -74.8 -60.7 -39.5 -14.4 10.2 30.1 43.0 48.7 49.8 49.6 51.3 56.6 

-20 5369 4610 3531 2151 538 -1204 -2947 -4561 -5941 -7015 -7755 -8170 -8299 -8197 -7925 -7540 -7082 -6574 -6020 

-53.0 -56.8 -60.2 -64.6 -69.7 -73.8 -74.2 -68.2 -54.8 -34.9 -11.4 11.6 30.5 42.9 48.9 50.5 50.9 52.8 57.5 

-25 5979 5235 4178 2824 1235 -485 -2212 -3818 -5197 -6279 -7040 -7492 -7679 -7656 -7479 -7196 -6835 -6411 -5926 

-30 

-47.4 -51.0 -54.6 -59.0 -63.7 -67.2 -67.1 -61.2 -48.5 -30.1 -8.4 12.9 30.6 42.8 49.5 52.1 53.3 55.3 59.1 

6694 5943 4890 3549 1980 280 -1431 -3028 -4410 -5508 -6298 -6793 -7036 -7081 -6980 -6775 -6490 -6138 -5727 

-41.2 -45.1 -49.1 -53.7 -58.1 -61.1 -60.5 -54.6 -42.7 -25.8 -6.1 13.6 30.5 42.8 50.3 54.3 56.4 58.4 60.9 

-35 7498 6722 5657 4319 2764 1085 -605 -2191 -3576 -4694 -5521 -6067 -6370 -6482 -6449 -6312 -6097 -5821 -5503 

-35.0 -39.5 -44.1 -49.0 -53.3 -55.7 -54.7 -48.9 -37.9 -22.4 -4.4 13.9 30.0 42.6 51.2 56.4 59.4 61.2 62.3 

-40 8359 7546 6460 5121 3583 1932 271 -1296 -2679 -3818 -4687 -5293 -5667 -5853 -5897 -5838 -5706 -5528 -5329 

-29.5 -34.6 -39.9 -45.0 -49.1 -51.2 -49.8 -44.1 -33.9 -19.7 -3.2 13.8 29.4 42.2 51.7 58.0 61.6 63.1 62.7 

-45 9234 8381 7276 5943 4433 2824 1207 -328 -1701 -2858 -3773 -4448 -4907 -5187 -5330 -5375 -5356 -5306 -5258 

-25.4 -30.9 -36.4 -41.5 -45.4 -47.0 -45.3 -39.8 -30.2 -17.3 -2.1 13.7 28.6 41.5 51.5 58.3 62.2 63.3 61.7 

-50 10076 9195 8086 6775 5311 3763 2206 718 -635 -1804 -2767 -3520 -4080 -4478 -4750 -4934 -5064 -5178 -5310 

-22.9 -28.3 -33.7 -38.4 -41.7 -42.7 -40.7 -35.3 -26.4 -14.6 -0.8 13.7 27.7 40.1 50.0 57.0 60.8 61.4 58.9 

-55 10851 9962 8871 7605 6210 4741 3261 1834 511 -666 -1677 -2515 -3193 -3732 -4163 -4518 -4831 -5138 -5470 

-21.7 -26.7 -31.4 -35.3 -37.7 -38.0 -35.6 -30.3 -22.1 -11.5 0.8 13.8 26.5 37.9 47.1 53.6 57.1 57.3 54.3 

-60 11541 10667 9618 8421 7113 5739 4349 2990 1703 521 -537 -1466 -2271 -2968 -3578 -4129 -4648 -5164 -5704 

-65 

-21.2 -25.2 -28.9 -31.7 -33.0 -32.4 -29.7 -24.5 -17.1 -7.8 2.8 14.0 24.9 34.7 42.6 48.3 51.2 51.2 48.2 

12144 11305 10318 9205 7996 6724 5426 4137 2887 1701 

-20.4 -23.3 -25.7 -27.2 -27.4 -26.1 -23.0 -18.2 -11.8 -4.0 

594 -426 -1362 -2222 -3020 -3774 -4505 -5233 -5976 

4.8 13.8 22.6 30.4 36.8 41.3 43.6 43.5 41.0 

-70 12672 11881 10964 9939 8827 7651 6438 5210 3991 2798 1642 533 -528 -1545 -2523 -3473 -4405 -5330 -6259 

-18.3 -20.0 -21.2 -21.6 -20.9 -19.1 -16.1 -11.9 -6.6 -0.4 6.3 13.1 19.6 25.4 30.0 33.3 34.9 34.8 33.0 

-75 13144 12401 11549 10600 9568 8470 7321 6139 4937 3729 2525 1333 158 -999 -2138 -3259 -4366 -5460 -6544 

-14.2 -15.0 -15.3 -15.0 -13.9 -12.0 -9.3 -6.0 -2.0 2.4 7.0 11.6 15.9 19.7 22.8 24.9 25.9 25.8 24.6 

-80 13577 12869 12062 11164 10184 9132 8019 6855 5652 4419 3165 1898 625 -648 -1915 -3171 -4414 -5637 -6836 

-8.1 -8.3 -8.2 -7.6 -6.5 -5.1 -3.2 -1.0 1.5 4.2 6.9 9.5 11.9 13.9 15.5 16.6 17.1 17.0 16.2 

-85 13975 13282 12491 11609 10641 9596 8482 7306 6078 4806 3499 2166 816 -542 -1899 -3246 -4575 -5877 -7142 

-0.5 -0.5 -0.3 o.o 0.6 1.3 2.1 3.0 4.0 5.0 6.0 6.9 7.7 8.3 8.8 9.0 8.9 8.6 8.0 

-90 14330 13625 12816 11910 10913 9833 8678 7457 6180 4855 3494 2105 701 -708 -2112 -3500 -4862 -6186 -7464 

7.4 7.3 7.3 7.1 7.0 6.7 6.5 6.1 5.8 5.3 4.9 4.4 3.8 3.3 2.7 2.1 1.5 0.8 0.2 
~ 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 VERTICAL INTENSITY (Z) 

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 

6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 

55504 55531 55571 55626 55694 55774 55866 55968 56080 56198 56322 56450 56579 56709 56837 56960 57078 57189 57291 

13.2 13.5 13.8 14.0 14.2 14.2 14.2 14.1 14.0 13.7 13.4 13.0 12.5 11.9 11.3 10.6 9.8 9.1 8.2 

54095 54128 54199 54305 54447 54623 54830 55066 55328 55611 55910 56221 56538 56855 57166 57464 57743 57999 58225 

18.4 19.4 20.3 21.1 21.7 22.2 22.5 22.6 22.5 22.2 21.6 20.9 19.9 18.7 17.4 15.9 14.3 12.5 10.7 

52621 52641 52721 52862 53062 53320 53633 53997 54407 54859 55344 55854 56380 56910 57433 57934 58403 58826 59192 

20.6 22.5 24.2 25.8 27.2 28.3 29.1 29.5 29.7 29.4 28.8 27.8 26.5 24.8 22.8 20.6 18.2 15.6 12.9 

51123 51121 51200 51359 51597 51911 52301 52762 53291 53882 54526 55213 55931 56664 57393 58098 58757 59350 59854 

19.5 22.3 25.0 27.4 29.6 31.3 32.7 33.5 33.9 33.7 33.0 31.9 30.2 28.2 25.8 23.1 20.2 17.1 13.9 

49545 49531 49613 49787 50052 50404 50842 51364 51967 52648 53400 54214 55076 55967 56864 57740 58563 59302 59925 

16.1 19.8 23.3 26.5 29.3 31.6 33.3 34.4 34.8 34.5 33.6 32.2 30.3 28.0 25.3 22.5 19.5 16.4 13.3 

47772 47771 47875 48077 48372 48755 49223 49776 50414 51135 51937 52814 53754 54738 55739 56726 57659 58498 59201 

11.8 16.2 20.4 24.2 27.5 30.2 32.0 33.0 33.2 32.5 31.2 29.3 27.0 24.4 21.6 18.8 16.1 13.5 11.0 

45671 45709 45859 46108 46446 46865 47359 47928 48573 49295 50098 50979 51930 52933 53~63 54985 55957 56832 57560 

7.7 12.9 17.8 22.2 25.9 28.7 30.5 31.2 30.8 29.6 27.5 24.9 22.1 19.1 16.2 13.5 11.3 9.4 8.0 

43116 43211 43422 43732 44125 44588 45112 45695 46337 47041 47814 48655 49560 50515 51497 52476 53408 54247 54941 

4.3 10.3 16.0 21.2 25.4 28.5 30.2 30.5 29.5 27.5 24.7 21.3 17.8 14.4 11.3 8.7 6.8 5.8 5.5 

45 39995 40149 40422 40795 41245 41755 42314 42914 43556 44241 44972 45750 46571 47425 48295 49156 49975 50709 51313 

0.6 7.7 14.6 20.8 25.9 29.5 31.4 31.5 30.1 27.5 24.0 20.2 16.2 12.5 9.1 6.5 4.8 4.3 4.9 

40 36203 36403 36727 37150 37646 38197 38789 39413 40065 40740 41435 42144 42861 43580 44289 44975 45618 46191 46661 

-5.2 3.4 11.7 19.4 25.9 30.5 33.0 33.4 32.1 29.4 26.0 22.2 18.3 14.5 11.1 8.3 6.5 6.0 7.0 

35 31643 31871 32226 32678 33199 33774 34391 35041 35713 36393 37064 37710 38319 38883 39401 39874 40303 40681 40993 

-15.0 -4.8 5.3 15.0 23.3 29.5 33.2 34.5 33.9 32.1 29.5 26.7 23.7 20.7 17.6 14.7 12.5 11.5 12.2 

30 26255 26489 26852 27306 27826 28402 29029 29701 30401 31099 31761 32355 32858 33264 33580 33826 34026 34201 34354 

-30.1 -18.4 -6.2 5.6 16.2 24.5 30.1 33.1 34.1 33.9 33.3 32.5 31.5 29.9 27.7 24.9 22.2 20.3 19.9 

25 20058 20273 20616 21041 21529 22079 22699 23387 24116 24841 25505 26056 26461 26715 26835 26863 26847 26834 26852 

-50.2 -37.2 -23.2 -9.1 4.0 14.9 23.0 28.3 31.6 33.9 36.1 38.3 40.1 40.8 40.0 37.5 34.1 30.9 28.9 

20 13201 13362 13647 14006 14425 14922 15516 16209 16965 17718 18389 18903 19220 19333 19276 19110 18909 18744 18665 

-73.2 -59.4 -44.0 -27.7 -12.0 1.8 12.8 20.9 27.1 32.4 37.8 43.4 48.5 51.9 52.8 50.7 46.5 41.6 37.4 

15 5981 6037 6213 6458 6771 7185 7735 8422 9199 9976 10648 11124 11356 11341 11129 10799 10449 10171 10034 

-95.6 -81.7 -65.4 -47.2 -28.9 -12.0 2.1 13.4 22.6 30.9 39.4 48.2 56.3 62.2 64.5 62.7 57.5 50.5 43.7 

10 -1183 -1296 -1290 -1210 -1041 -732 -242 

-113.0 -99.7 -83.1 -63.5 -42.6 -22.7 -5.3 

428 1212 1997 2654 3078 3218 3080 2725 2254 1781 1417 1245 

9.0 20.8 31.6 42.4 53.3 63.4 70.8 73.9 71.8 65.3 56.0 46.2 

5 -7827 -8169 -8389 -8516 -8516 -8326 -7904 -7264 -6493 -5730 -5121 -4780 -4757 -5034 -5536 -6149 -6742 -7192 -7403 

-122.0-109.8 -93.2 -72.4 -49.4 -26.6 -6.3 10.6 24.4 36.4 47.9 59.3 69.7 77.2 79.9 76.9 68.7 56.9 44.1 

0 -13542-14146-14621-14968-15138-15062-14707-14111-13386-12690-12183-11977-12117-12571-13251-14032-14773-15340-15630 

-120.5-109.5 -93.2 -71.6 -46.7 -21.6 1.0 19.5 34.0 45.8 56.2 66.0 74.7 80.5 81.7 77.1 66.9 52.8 37.3 
...., 

~ 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 VERTICAL INTENSITY (Z) 

90 95 100 105 110 115 120 125 130 135 140 145 150 15 5 160 165 170 175 180 

56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 

6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 

57291 57383 57465 57534 57592 57637 57671 57693 57705 57706 57700 57685 57664 57639 57610 57578 57546 57512 57479 

8.2 7.4 6.6 5.8 4.9 4.2 3.4 2.7 2.0 1.4 0.9 0.4 o.o -0.3 -0.5 -0.7 -0.8 -0.9 -0.8 

58225 58418 58574 58692 58769 58808 58808 58774 58709 58619 58508 58383 58250 58115 57984 57862 57754 57663 57591 

10.7 8.9 7.0 5.1 3.3 1.6 0.0 -1.5 -2.8 -4.0 -5.0 -5.8 -6.4 -6.8 -7.0 -7.0 -6.9 -6.6 -6.2 

59192 59490 59714 59858 59920 59901 59806 59641 59417 59146 58841 58517 58190 57873 57580 57324 57113 56955 56855 

12.9 10.1 7.3 4.6 1.9 -0.7 -3.0 -5.2 -7.0 -8.6 -9.9 -10.8 -11.4 -11.7 -11.7 -11.3 -10.7 -9.9 -8.9 

59854 60253 60532 60681 60695 60576 60332 59976 59528 59008 58442 57857 57279 56734 56245 55832 55511 55292 55184 

13.9 10.6 7.4 4.1 1.0 -1.9 -4.7 -7.1 -9.2 -11.0 -12.4 -13.3 -13.9 -13.9 -13.6 -12.9 -11.9 -10.6 -9.1 

59925 60405 60718 60848 60787 60537 60110 59527 58816 58012 57153 56280 55432 54647 53958 53393 52972 52710 52615 

13.3 10.1 7.0 4.0 1.1 -1.6 -4.2 -6.5 -8.5 -10.2 -11.5 -12.4 -12.9 -13.0 -12.6 -11.9 -10.7 -9.2 -7.5 

59201 59728 60048 60137 59984 59589 58968 58149 57171 56083 54937 53787 52688 51686 50823 50132 49639 49357 49294 

11.0 8.7 6.5 4.5 2.5 0.5 -1.3 -3.1 -4.6 -6.0 -7.2 -8.1 -8.7 -9.0 -9.0 -8.7 -8.0 -6.9 -5.5 

57560 58093 58392 58425 58174 57641 56840 55808 54593 53255 51862 50482 49179 48012 47026 46257 45731 45459 45444 

8.0 7.0 6.3 5.7 5.1 4.4 3.6 2.7 1.8 0.8 -0.1 -1.0 -1.9 -2.8 -3.7 -4.4 -4.8 -4.8 -4.2 

54941 55437 55690 55661 55327 54682 53743 52547 51152 49629 48057 46517 45084 43822 42781 41997 41488 41262 41315 

5.5 5.9 6.8 7.9 8.8 9.5 9.8 9.6 9.2 8.6 7.8 6.9 5.7 4.1 2.2 0.1 -1.9 -3.4 -4.2 

45 51313 51735 51926 51843 51453 50744 49728 48441 46946 45321 43657 42046 40569 39298 38283 37553 37123 36987 37132 

4.9 6.5 8.8 11.2 13.5 15.1 15.9 16.0 15.7 15.1 14.4 13.5 12.2 10.2 7.4 4.0 0.3 -3.1 -5.5 

40 46661 46984 47110 46991 46587 45873 44855 43563 42060 40431 38774 371R9 35765 34575 33669 33071 32783 32789 33059 

7.0 9.3 12.4 15.7 18.5 20.2 20.8 20.3 19.2 18.1 17.2 16.4 15.3 13.5 10.5 6.3 1.3 -3.6 -7.4 

35 40993 41207 41279 41154 40784 40130 39186 37977 36563 35031 33484 32026 30750 29731 29015 28621 28538 28735 29165 

12.2 14.4 17.6 20.9 23.4 24.2 23.3 21.1 18.3 15.9 14.4 13.8 13.5 12.6 10.3 6.4 1.2 -4.4 -9.1 

30 34354 34471 34512 34420 34132 33600 32802 31756 30519 29178 27837 26601 25561 24791 24333 24199 24370 24798 25418 

19.9 21.2 23.6 26.1 27.3 26.3 22.9 17.8 12.3 7.8 5.3 4.9 5.9 6.8 6.5 4.1 -0.2 -5.3 -10.0 

25 26852 26901 26946 26927 26769 26410 25816 24997 24008 22934 21877 20937 20201 19736 19580 19741 20191 20868 21691 

28.9 28.5 29.4 30.2 29.5 25.9 19.3 10.7 1.8 -5.3 -9.2 -9.4 -6.9 -3.5 -1.0 -0.6 -2.6 -6.1 -9.6 

20 18665 18684 18773 18865 18875 18726 18374 17823 17127 16368 15643 15046 14651 14517 14677 15134 15857 16776 17795 

37.4 34.8 33.5 32.1 29.0 22.6 12.8 0.6 -11.7 -21.5 -26.8 -26.9 -22.8 -16.7 -10.9 -7.1 -5.9 -6.6 -8.1 

15 10034 10060 10226 10457 10657 10736 10641 10372 9981 9550 9171 8924 8873 9063 9519 10245 11208 12336 13524 

43.7 38.3 34.3 30.5 25.0 16.2 3.7 -11.3 -26.2 -38.0 -44.3 -44.4 -38.9 -30.4 -21.4 -14.1 -9.4 -6.9 -5.6 

10 1245 1298 1553 1930 2320 2622 2773 2771 2665 2541 2482 2558 2819 3294 4004 4949 6100 7387 8703 

46.2 37.7 30.8 24.5 17.0 6.6 -7.2 -23.4 -39.4 -52.0 -58.7 -58.5 -52.1 -41.8 -30.4 -20.2 -12.3 -6.6 -2.5 

5 -7403 -7335 -7009 -6511 -5958 -5466 -5104 -4881 -4746 -4615 -4408 -4065 -3550 -2845 -1941 -835 445 1838 3243 

44.1 32.4 22.6 14.1 5.2 -5.6 -19.2 -34.6 -49.7 -61.4 -67.4 -66.6 -59.6 -48.5 -35.9 -24.0 -13.8 -5.6 1.1 

0 -15630-15594-15251-14690-14034-13410-12896-12506-12193-11875-11473-10934-10233 -9363 -8322 -7112 -5753 -4299 -2842 

37.3 22.8 10.4 0.2 -9.3 -19.5 -31.2 -44.0 -56.2 -65.3 -69.4 -67.5 -60.2 -49.2 -36.7 -24.4 -13.3 -3.6 5.0 
~ 

(X) 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 VERTICAL INTENSITY (Z) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 

6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 

57479 57447 57415 57385 57355 57326 57296 57266 57234 57200 57163 57121 57075 57024 56967 56904 56834 56759 56678 

-0.8 -0.8 -0.6 -0.5 -0.2 0.0 0.3 0.6 0.9 1.2 1.6 2.0 2.3 2.7 3.1 3.5 3.9 4.3 4.7 

57591 57540 57510 57499 57507 57529 57562 57602 57644 57683 57714 57733 57736 57718 57678 57612 57520 57401 57256 

-6.2 -5.7 -5.1 -4.5 -3.8 -3.2 -2.5 -1.9 -1.3 -0.7 -0.2 0.3 0.8 1.2 1.6 2.0 2.4 2.7 3.1 

56855 56814 56832 56905 57028 57191 57386 57601 57824 58044 58249 58427 58568 58664 58708 58695 58621 58487 58293 

-8.9 -7.8 -6.7 -5.5 -4.4 -3.3 -2.4 -1.6 -0.9 -0.4 -0.1 0.1 0.2 0.2 0.2 0.2 0.1 0.1 0.1 

55184 55187 55299 55512 55815 56193 56628 57100 57589 58073 58532 58946 59298 59573 59759 59847 59833 59713 59491 

-9.1 -7.4 -5.7 -4.1 -2.6 -1.4 -0.4 0.2 o.s 0.4 0.1 -0.5 -1.2 -2.1 -2.9 -3.8 -4.7 -5.4 -6.1 

52615 52687 52922 53307 53824 54452 55164 55933 56726 57515 58270 58963 59569 60067 60439 60673 60758 60690 60471 

-7.5 -5.5 -3.6 -1.7 -0.1 1.1 1.8 1.8 1.3 0.3 -1.2 -3.1 -5.1 -7.3 -9.4 -11.5 -13.4 -15.2 -16.7 

49294 49449 49812 50368 51094 51962 52939 53989 55076 56160 57207 58181 59052 59792 60378 60792 61017 61045 60872 

-5.5 -3.7 -1.8 0.1 1.7 2.6 2.8 2.2 o.5 -1.9 -5.o -8.5 -12.2 -16.0 -19.7 -23.1 -26.4 -29.4 -32.0 

45444 45683 46161 46860 47754 48812 49998 51273 52594 53921 55213 56432 57545 58519 59326 59940 60340 60506 60427 

-4.2 -3.0 -1.5 0.2 1.7 2.4 2.2 0.6 -2.2 -6.1 -10.9 -16.3 -21.8 -27.3 -32.6 -37.6 -42.3 -46.8 -50.9 

41315 41635 42206 43006 44009 45184 46497 47908 49377 50863 52324 53723 55026 56198 57208 58024 58613 58947 59001 

-4.2 -4.1 -3.1 -1.7 -0.3 0.4 -0.2 -2.5 -6.5 -11.9 -18.3 -25.3 -32.3 -39.2 -45.9 -52.4 -58.7 -64.9 -71.0 

45 37132 37537 38181 39038 40087 41301 42651 44104 45624 47173 48713 50209 51630 52942 54112 55102 55873 56382 56589 

-5.5 -6.6 -6.3 -5.1 -3.6 -3.0 -3.8 -6.7 -11.6 -18.2 -25.8 -33.9 -41.8 -49.5 -56.9 -64.4 -72.2 -80.3 -88.7 

40 33059 33561 34265 35146 36186 37368 38675 40082 41562 43083 44612 46119 47576 48954 50221 51337 52253 52918 53278 

-7.4 -9.6 -9.9 -8.9 -7.4 -6.7 -7.8 -11.3 -17.0 -24.4 -32.6 -40.8 -48.5 -55.8 -63.0 -70.8 -79.6 -89.6-100.5 

35 29165 29781 30543 31425 32415 33511 34709 36000 37367 38783 40222 41660 43074 44441 45732 46909 47921 48707 49202 

-9.1 -12.0 -12.8 -11.9 -10.6 -10.2 -11.8 -16.0 -22.4 -30.1 -38.0 -45.1 -51.2 -56.7 -62.4 -69.4 -78.5 -90.1-103.5 

30 25418 26165 26986 27856 28769 29741 30786 31912 33112 34368 35658 36961 38263 39548 40795 41972 43026 43894 44502 

-10.0 -12.9 -13.8 -13.2 -12.4 -12.8 -15.5 -20.7 -27.8 -35.3 -41.9 -46.6 -49.5 -51.5 -54.3 -59.5 -68.2 -80.7 -96.3 

25 21691 22577 23459 24309 25133 25960 26829 27764 28769 29832 30933 32057 33197 34349 35502 36631 37689 38610 39315 

-9.6 -11.9 -12.6 -12.3 -12.3 -14.1 -18.5 -25.2 -32.9 -39.8 -44.1 -45.0 -43.3 -40.5 -39.2 -41.6 -49.2 -62.1 -79.2 

20 17795 18814 19756 20587 21321 22006 22699 23442 24248 25109 26007 26932 27886 28876 29908 30966 32009 32971 33770 

-8.1 -9.0 -9.1 -9.1 -10.3 -13.9 -20.3 -28.7 -37.0 -42.6 -43.9 -40.1 -32.8 -24.4 -18.5 -17.7 -23.8 -36.5 -54.6 

15 13524 14659 15655 16474 17135 17701 18246 18823 19454 20132 20840 21572 22341 23170 24078 25062 26091 27098 27994 

-5.6 -4.6 -3.8 -3.9 -6.3 -11.9 -20.5 -30.4 -38.8 -42.8 -40.4 -31.6 -18.4 -4.5 5.9 9.5 4.9 -7.6 -26.0 

10 8703 9932 10978 11801 12424 12917 13365 13830 14337 14877 15435 16009 16621 17310 18112 19038 20062 21119 22116 

-2.5 0.8 2.8 2.8 -0.6 -7.9 -18.1 -29.0 -37.1 -38.9 -32.8 -19.1 -0.7 17.7 31.5 37.1 33.2 20.9 2.4 

5 3243 4541 5638 6490 7122 7606 8030 8458 8912 9384 9856 10329 10834 11424 12150 13035 14064 15172 16265 

1.1 6.5 9.9 10.3 6.5 -1.7 -12.8 -23.8 -30.8 -30.3 -20.7 -3.0 19.0 40.3 55.7 61.9 57.8 45.2 26.8 

0 -2842 -1490 -336 577 1272 1818 2298 2771 3256 3740 4203 4647 5108 5649 6333 7196 8232 9383 10554 

5.0 12.1 16.9 18.1 14.5 6.4 -4.5 -14.7 -20.1 -17.3 -5.1 15.1 38.9 60.9 76.0 81.1 75.9 62.6 44.3 
~ 

-o 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 VERTICAL INTENSITY (Z) 

-90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 56705 

6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 6.2 

56678 56592 56502 56408 56312 56216 56119 56025 55933 55847 55767 55695 55632 55579 55538 55509 55493 55492 55504 

4.7 5.1 5.6 6.0 6.5 7.0 7.5 7.9 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.4 12.8 13.2 

57256 57086 56894 56683 56456 56217 55972 55724 55479 55241 55015 54806 54617 54453 54316 54210 54137 54098 54095 

3.1 3.6 4.0 4.5 5.1 5.7 6.3 7.1 7.9 8.7 9.7 10.7 11.7 12.8 14.0 15.1 16.2 17.3 18.4 

58293 58042 57740 57392 57007 56594 56161 55719 55278 54847 54435 54050 53700 53391 53129 52917 52761 52661 52621 

0.1 0.2 0.3 0.6 0.9 1.4 2.1 2.9 3.8 5.0 6.3 7.7 9.3 11.0 12.8 14.7 16.7 18.6 20.6 

59491 59169 58758 58267 57711 57104 56462 55803 55143 54498 53882 53307 52785 52325 51932 51612 51369 51206 51123 

-6.1 -6.6 -6.9 -7.1 -7.0 -6.7 -6.1 -5.2 -4.0 -2.6 -0.9 1.1 3.3 5.7 8.3 11.0 13.8 16.7 19.5 

60471 60104 59602 58978 58253 57450 56593 55708 54823 53959 53138 52379 51694 51094 50587 50177 49866 49656 49545 

-16.7 -18.0 -18.9 -19.5 -19.7 -19.5 -18.7 -17.5 -15.8 -13.7 -11.2 -8.4 -5.4 -2.1 1.4 4.9 8.6 12.4 16.1 

60872 60501 59941 59210 58335 57346 56280 55174 54068 52993 51981 51055 50230 49519 48928 48458 48111 47883 47772 

-32.0 -34.3 -36.1 -37.3 -37.8 -37.4 -36.3 -34.3 -31.6 -28.2 -24.3 -20.1 -15.7 -11.1 -6.6 -2.0 2.6 7.2 11.8 

60427 60098 59525 58726 57730 56578 55319 54006 52693 51425 50244 49177 48244 47455 46813 46319 45967 45754 45671 

-50.9 -54.6 -57.6 -59.7 -60.6 -60.2 -58.4 -55.2 -50.8 -45.4 -39.4 -33.1 -26.7 -20.5 -14.5 -8.7 -3.1 2.4 7.7 

59001 58759 58218 57392 56313 55029 53603 52106 50608 49172 47848 46671 45660 44822 44159 43664 43331 43152 43116 

-71.0 -76.6 -81.4 -84.9 -86.6 -86.4 -83.9 -79.3 -72.9 -65.0 -56.3 -47.3 -38.4 -30.0 -22.2 -15.1 -8.4 -2.0 4.3 

45 56589 56466 55995 55184 54062 52685 51127 49477 47823 46244 44802 43536 42465 41595 40920 40433 40123 39981 39995 

-88.7 -96.8-104.1-109.7-113.0-113.4-110.7-105.0 -96.7 -86.3 -74.8 -62.9 -51.3 -40.5 -30.8 -22.2 -14.2 -6.7 0.6 

40 53278 53288 52916 52158 51038 49613 47967 46201 44421 42721 41172 39820 38686 37771 37069 36572 36270 36152 36203 

-100.5-111.6-122.0-130.5-136.1-138.1-136.1-130.2-120.9-108.8 -95.0 -80.6 -66.5 -53.5 -41.9 -31.6 -22.4 -13.7 -5.2 

35 49202 49345 49092 48423 47352 45930 44244 42404 40524 38712 37049 35587 34351 33346 32573 32025 31696 31576 31643 

-103.5-117.8-131.6-143.6-152.3-156.9-157.0-152.5-143.8-131.6-116.9-101.1 -85.2 -70.4 -57.0 -45.3 -34.8 -24.9 -15.0 

30 44502 44777 44659 44113 43137 41771 40094 38215 36255 34326 32519 30895 29491 28325 27409 26752 26351 26195 26255 

-96.3-113.5-130.8-146.3-158.7-167.1-170.8-169.6-163.7-153.6-140.0-124.2-107.6 -91.6 -76.9 -63.9 -52.3 -41.2 -30.1 

25 39315 39722 39755 39362 38522 37257 35631 33744 31712 29651 27659 25811 24160 22750 21615 20782 20260 20033 20058 

-79.2 -98.9-119.0-137.9-154.2-167.0-175.8-179.9-179.2-173.4-162.9-148.9-132.7-116.1-100.5 -86.5 -74.1 -62.3 -50.2 

20 33770 34313 34511 34293 33619 32487 30942 29066 26968 24761 22551 20427 18468 16748 15331 14269 13582 13246 13201 

-54.6 -75.8 -98.0-119.5-139.3-157.0-171.7-182.7-188.9-189.4-183.8-172.7-157.9-141.4-125.2-110.6 -97.6 -85.6 -73.2 

15 27994 28678 29050 29018 28523 27539 26090 24240 22086 19735 17301 14888 12604 10552 8830 7511 6625 6142 5981 

-26.0 -47.8 -71.0 -94.1-116.8-138.9-159.8-178.2-192.2-199.9-200.0-192.7-179.7-163.5-147.0-132.0-119.2-107.6 -95.6 

10 22116 22943 23484 23635 23315 22480 21135 19325 17136 14672 12051 9393 6826 4481 2480 914 -185 -852 -1183 

2.4 -19.3 -42.4 -66.1 -90.5-116.0-142.3-167.5-189.0-203.6-209.3-205.6-194.3-178.5-161.8-146.9-134.5-123.9-113.0 

5 16265 17222 17918 18235 18077 17385 16147 14399 12215 9700 6972 4164 1417 -1126 -3329 -5098 -6400 -7277 -7827 

26.8 5.7 -16.5 -39.5 -64.3 -91.9-122.0-152.5-179.8-200.0-210.0-209.1-199.0-183.4-166.6-151.9-140.5-131.4-122.0 

0 10554 11621 12450 12912 12901 12345 11225 9568 7446 4962 2237 -592 -3382 -5989 -8286-10183-11655-12744-13542 

44.3 24.2 3.7 -17.9 -41.9 -69.9-101.8-135.2-165.9-189.3-201.8-202.3-192.7-177.1-160.3-146.0-135.7-128.1-120.5 
LONG 

LAT 

0 

-5 

-10 

-15 

-20 

-25 

-30 

-35 

-40 VI 

0 

-45 

-50 

-55 

-60 

-65 

-70 

-75 

-80 

-85 

-90 

IGRF 1980 VERTICAL INTENSITY (Z) 

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

-13542-14146-14621-14968-15138-15062-14707-14111-13386-12690-12183-11977-12117-12571-13251-14032-14773-15340-15630 

-120.5-109.5 -93.2 -71.6 -46.7 -21.6 1.0 19.5 34.0 45.8 56.2 66.0 74.7 80.5 81.7 77.1 66.9 52.8 37.3 

-18057-18913-19622-20161-20467-20480-20187-19653-19015-18447-18111-18112-18480-19170-20081-21081-22022-22765-23201 

-108.4 -98.4 -82.4 -60.3 -34.2 -7.7 16.0 34.9 48.6 58.3 65.8 72.1 77.2 79.9 78.5 71.9 60.0 44.1 26.7 

-21290-22331-23203-23862-24243-24304-24062-23613-23114-22744-22658-22944-23613-24605-25810-27089-28294-29284-29947 

-87.8 -78.2 -62.3 -40.1 -13.9 12.8 36.1 53.7 65.0 71.1 73.9 75.2 75.5 74.2 69.8 61.4 48.4 32.0 13.9 

-23335-24451-25377-26058-26440-26507-26311-25975-25668-25564-25800-26439-27473-28824-30376-31988-33514-34814-35776 

-61.9 -52.0 -36.2 -14.4 11.0 36.2 57.4 72.0 79.3 80.5 77.9 73.5 68.5 63.0 56.1 46.5 33.7 18.1 1.1 

-24409-25476-26341-26948-27267-27315-27174-26985-26918-27133-27738-28774-30205-31945-33870-35842-37719-39368-40677 

-34.2 -23.5 -7.6 13.1 36.4 58.5 75.9 86.0 88.3 84.1 75.8 65.9 56.2 47.3 38.7 29.2 18.1 5.0 -9.2 

-24786-25703-26417-26890-27118-27149-27087-27081-27290-27849-28839-30271-32094-34210-36496-38818-41041-43040-44709 

-7.6 4.4 20.2 39.2 59.2 76.9 89.1 93.8 90.7 81.1 67.8 53.5 40.4 29.5 20.5 12.5 4.3 -4.9 -15.0 

-24745-25459-25987-26315-26468-26515-26572-26781-27281-28179-29527-31315-33479-35918-38512-41135-43662-45977-47980 

16.2 29.5 44.9 61.6 77.6 90.1 96.7 95.7 87.4 73.5 56.5 39.4 24.6 13.2 5.2 -0.4 -4.8 -9.3 -14.7 

-24543-25058-25422-25648-25778-25896-26114-26558-27341-28542-30188-32255-34675-37350-40169-43014-45773-48339-50618 

36.8 51.1 65.7 79.8 91.5 98.8 100.0 94.1 81.9 65.0 46.2 28.2 13.2 2.7 -3.5 -6.2 -6.8 -6.9 -7.6 

-24420-24786-25051-25244-25421-25665-26075-26755-27789-29231-31093-33343-35915-38721-41661-44631-47530-50260-52736 

54.6 69.2 82.7 94.1 101.9 104.8 101.7 92.5 78.0 60.1 41.2 23.9 10.3 1.4 -2.7 -2.8 -0.4 2.8 5.6 

-24606-24893-25133-25365-25648-26053-26662-27553-28786-30394-32379-34708-37325-40153-43107-46097-49034-51831-54408 

70.3 84.4 96.5 105.4 110.2 110.0 104.4 93.7 78.9 61.8 44.5 29.3 17.6 10.6 8.2 9.7 13.7 18.7 23.2 

-25323-25590-25863-26181-26596-27165-27949-29003-30366-32057-34072-36383-38942-41690-44555-47461-50333-53093-55671 

84.2 97.1 107.5 114.5 117.3 115.6 109.3 99.0 85.6 70.9 56.4 43.8 34.5 29.1 27.6 29.4 33.4 38.3 42.8 

-26758-27040-27370-27783-28318-29018-29925-31074-32488-34178-36136-38340-40753-43328-46008-48733-51438-54060-56536 

96.1 107.2 115.8 121.3 123.3 121.4 115.9 107.4 96.7 85.1 73.9 64.3 57.1 52.8 51.5 52.6 55.3 58.7 61.7 

-29037-29337-29715-30197-30810-31584-32542-33707-35091-36698-38519-40538-42726-45048-47459-49913-52360-54746-57022 

105.3 114.2 121.1 125.5 127.1 125.9 122.1 116.1 108.7 100.5 92.6 85.6 80.2 76.6 74.9 74.7 75.5 76.7 77.6 

-32188-32489-32884-33389-34022-34798-35732-36835-38111-39560-41174-42940-44836-46836-48908-51016-53124-55191-57180 

111.1 117.6 122.8 126.3 127.9 127.6 125.6 122.1 117.6 112.5 107.3 102.6 98.6 95.4 93.2 91.8 90.8 90.0 89.0 

-36129-36407-36781-37260-37851-38563-39402-40371-41471-42699-44047-45504-47055-48681-50359-52066-53775-55459-57091 

113.1 117.4 121.0 123.6 125.0 125.4 124.7 123.1 120.7 117.9 114.9 111.8 108.9 106.3 103.9 101.8 99.8 97.8 95.7 

-40677-40911-41230-41637-42135-42725-43409-44187-45056-46012-47049-48158-49328-50547-51801-53074-54350-55612-56843 

111.6 114.1 116.2 117.9 118.9 119.4 119.4 118.8 117.8 116.4 114.8 112.9 111.0 109.0 106.9 104.8 102.7 100.6 98.3 

-45571-45744-45980-46279-46640-47064-47548-48091-48689-49340-50037-50776-51550-52352-53172-54004-54838-55666-56477 

107.9 109.0 109.9 110.6 111.1 111.4 111.5 111.3 110.8 110.2 109.4 108.4 107.2 106.0 104.6 103.2 101.7 100.1 98.5 

-50498-50594-50723-50884-51077-51300-51551-51830-52134-52461-52808-53173-53553-53944-54343-54746-55151-55553-55949 

103.1 103.3 103.5 103.6 103.7 103.7 103.6 103.5 103.3 103.0 102.6 102.2 101.7 101.2 100.6 100.0 99.4 98.8 98.1 

-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121 

98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 
LONG 

LAT 

0 

-5 

-10 

-15 

-20 

-25 

CJI 

..... -30 

-35 

-40 

-45 

-so 

-55 

-60 

-65 

-70 

-75 

-80 

-85 

-90 

IGRF 1980 VERTICAL INTENSITY (Z) 

90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 

-15630-15594-15251-14690-14034-13410-12896-12506-12193-11875-11473-10934-10233 -9363 -8322 -7112 -5753 -4299 -2842 

37.3 22.8 10.4 0.2 -9.3 -19.5 -31.2 -44.0 -56.2 -65.3 -69.4 -67.5 -60.2 -49.2 -36.7 -24.4 -13.3 -3.6 s.o 

-23201-23273-22998-22460-21787-21110-20517-20030-19607-19171-18646-17982-17163-16188-15061-13789-12388-10904 -9416 

26.7 10.2 -4.0 -15.4 -24.8 -33.4 -42.2 -50.9 -58.7 -63.9 -65.2 -61.8 -54.4 -44.2 -32.8 -21.3 -10.5 -0.3 9.1 

-29947-30219-30110-29697-29105-28465-27872-27356-26885-26390-25801-25073-24190-23157-21984-20679-19259-17761-16252 

13.9 -3.4 -18.4 -30.1 -38.8 -45.4 -50.7 -54.9 -57.8 -58.6 -56.6 -51.6 -44.1 -35.0 -25.2 -15.5 -5.8 3.9 13.4 

-35776-36333-36484-36294-35878-35361-34839-34351-33880-33369-32758-32005-31098-30041-28847-27529-26101-24598-23071 

1.1 -15.4 -29.8 -41.0 -48.7 -53.3 -ss.s -ss.7 -54.2 -s1.o -46.0 -39.5 -32.0 -24.0 -16.0 -8.1 0.1 8.8 17.8 

-40677-41578-42059-42169-42004-41678-41283-40866-40425-39921-39308-38553-37643-36584-35389-34069-32644-31139-29600 

-9.2 -23.4 -36.0 -45.9 -52.4 -55.5 -55.5 -53.0 -48.6 -42.6 -35.7 -28.2 -20.8 -13.8 -7.2 -0.7 6.1 13.7 22.0 

-44709-45977-46821-47272-47405-47313-47082-46762-46368-45881-45274-44523-43621-42571-41386-40078-38664-37168-35628 

-15.0 -25.5 -35.2 -43.2 -48.5 -50.8 -50.1 -46.8 -41.4 -34.5 -27.0 -19.4 -12.4 -6.0 -0.3 5.4 11.5 18.4 26.0 

-47980-49599-50801-51598-52041-52201-52151-51944-51608-51144-50544-49799-48908-47875-46710-45426-44037-42566-41043 

-14.7 -20.8 -27.2 -33.0 -37.3 -39.6 -39.5 -37.0 -32.6 -26.7 -20.1 -13.3 -7.0 -1.1 4.4 10.0 16.0 22.8 30.0 

-50618-52539-54059-55174-55911-56319-56456-56373-56106-55676-55091-54358-53483-52473-51339-50092-48746-47321-45843 

-7.6 -9.6 -12.7 -16.5 -20.2 -23.1 -24.5 -24.1 -22.1 -18.5 -14.0 -8.9 -3.6 1.9 7.5 13.4 20.0 27.1 34.3 

-52736-54884-56659-58040-59035-59672-59995-60048-59871-59496-58947-58243-57398-56425-55337-54144-52861-51505-50100 

5.6 6.8 6.1 3.8 0.4 -3.3 -6.6 -8.9 -9.8 -9.3 -7.4 -4.3 -0.2 4.7 10.4 17.0 24.2 31.9 39.4 

-54408-56697-58646-60226-61429-62268-62770-62971-62911-62626-62148-61505-60719-59808-58788-57672-56476-55215-53910 

23.2 26.0 26.7 25.2 21.7 17.1 12.1 7.5 3.9 1.7 1.1 2.2 4.9 9.3 15.0 21.9 29.7 37.8 45.7 

-55671-58003-60038-61740-63092-64095-64763-65123-65207-65050-64688-64149-63463-62651-61733-60725-59643-58503-57322 

42.8 45.7 46.5 45.0 41.3 36.1 30.0 23.9 18.5 14.4 12.0 11.6 13.2 16.8 22.2 29.0 36.8 45.1 53.0 

-56536-58811-60837-62577-64011-65130-65938-66453-66698-66702-66495-66108-65569-64900-64125-63260-62322-61328-60291 

61.7 63.5 63.4 61.4 57.5 52.1 45.7 39.2 33.2 28.4 25.1 23.8 24.6 27.5 32.2 38.5 45.8 53.5 61.2 

-57022-59142-61063-62754-64192-65365-66270-66915-67314-67490-67463-67260-66905-66419-65822-65134-64370-63544-62668 

77.6 77.6 76.4 73.7 69.7 64.5 58.7 52.7 47.2 42.6 39.4 37.9 38.2 40.4 44.2 49.5 55.7 62.5 69.3 

-57180-59054-60781-62334-63693-64844-65782-66507-67027-67352-67499-67484-67324-67038-66641-66150-65577-64934-64231 

89.0 87.5 85.2 82.1 78.2 73.7 68.9 64.1 59.7 56.1 53.5 52.2 52.4 53.9 56.8 60.8 65.7 71.1 76.6 

-57091-58646-60100-61433-62630-63678-64570-65302-65877-66299-66575-66714-66728-66626-66421-66122-65739-65282-64755 

95.7 93.3 90.6 87.5 84.2 80.6 77.0 73.6 70.5 68.0 66.3 65.4 65.5 66.6 68.6 71.3 74.7 78.5 82.6 

-56843-58027-59149-60195-61155-62019-62781-63436-63982-64419-64749-64976-65103-65136-65081-64942-64726-64437-64081 

98.3 96.0 93.6 91.1 88.6 86.1 83.7 81.6 79.7 78.2 77.2 76.7 76.8 77.5 78.6 80.2 82.3 84.6 87.2 

-56477-57263-58017-58731-59397-60010-60565-61059-61487-61849-62144-62370-62530-62624-62653-62620-62526-62374-62166 

98.5 96.9 95.3 93.8 92.3 90.9 89.5 88.4 87.4 86.7 86.2 85.9 85.9 86.2 86.7 87.5 88.4 89.6 90.8 

-55949-56336-56709-57066-57405-57721-58013-58278-58514-58721-58896-59039-59149-59225-59268-59277-59253-59197-59109 

98.1 97.4 96.8 96.2 95.6 95.1 94.6 94.1 93.8 93.5 93.3 93.1 93.1 93.1 93.2 93.4 93.7 94.0 94.3 

-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121 

98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 
LONG 

LAT 

0 

-5 

-10 

-15 

-20 

-25 

-30 

-35 

-40 01 

....., 

-45 

-so 

-55 

-60 

-65 

-70 

-75 

-80 

-85 

-90 

IGRF 1980 VERTICAL INTENSITY ( z) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

-2842 -1490 -336 577 1272 1818 2298 2 7 71 32 56 3740 4203 4647 5108 5649 6333 7196 82 32 9383 105 54 

5.0 12. 1 16.9 18.1 14.5 6.4 -4.5 -14.7 -20.1 -17.3 -5.1 15. 1 38.9 60.9 76.0 81. 1 75.9 62.6 44.3 

-9416 -8019 -6798 -5792 -4984 -4314 -3708 -3115 -2523 -1951 -1422 -93 4 -4 51 93 7 71 1629 2 6 71 3852 5080 

9. 1 17.4 23.3 25.4 22.7 15.5 5. 8 -2.8 -6.3 -1.7 12. 1 32.8 56.2 76.9 89.9 92.8 85.9 71.7 53.8 

-16252-14812-13514-12393-11439-10602 -9822 -9061 -8311 -7597 -6943 -6352 -5790 -5192 -4484 -3611 -2557 -1354 -83 

13.4 22.2 28.8 31.8 30.3 24.5 16.6 9.9 8.2 13.9 2 7. 7 47.3 68.5 86.0 95.9 96.1 87.5 72.8 55.5 

-23071-21588-20209-18968-17857-16842-15877-14933-14010-13131-12323-11591-10907-10213 -9436 -8518 -7432 -6197 -4881 

17.8 26.4 33.3 36.9 36.4 32.2 26.2 21.3 20.7 26.6 39.1 56.0 73.5 87.2 93.6 91.5 81.8 67.4 51.5 

-29600-28080-26630-25280-24030-22857-21728-20623-19545-18513-17551-16666-15834-15008-14121-13116-11960-10663 -9277 

22.0 30.1 36.7 40.6 40.9 37.9 33.3 29.6 29.4 34.4 44.5 57.8 71.1 80.8 84.3 80.8 71.3 58.4 44.7 

-35628-34087-32588-31161-29810-28522-27276-26058-24867-23717-22623-21591-20601-19615-18576-17435-16159-14753-13261 

26.0 33.5 39.6 43.4 43.9 41.7 37.9 34.6 33.9 37.1 44.1 53.5 62.8 69.1 70.8 67.1 59.2 48.8 38.2 

-41043-39508-37995-36533-35132-33785-32480-31203-29949-28722-27527-26364-25215-24049-22824-21501-20056-18496-16863 

30.0 36.9 42.6 45.9 46.4 44.3 40.7 37.2 35.4 36.5 40.4 46.1 52.0 56.0 56.9 54.4 48.9 42.0 34.6 

-45843-44345-42859-41410-40010-38658-37344-36055-34779-33508-32238-30959-29656-28305-26876-25345-23702-21962-20170 

34.3 41.0 46.2 49.2 49.5 47.4 43.7 39.7 36.8 35.8 36.9 39.7 43.1 45.8 46.9 46.1 43.6 40.0 35.9 

-50100-48674-47252-45858-44502-43185-41897-40624-39348-38053-36723-35344-33899-32372-30747-29014-27179-25268-23332 

39.4 46.1 51.2 54.1 54.4 52.4 48.7 44.5 40.7 38.3 37.5 38.3 40.1 42.2 43.8 44.7 44.8 44.0 42.4 

-53910-52584-51257-49948-48663-47404-46160-44914-43644-42329-40949-39486-37925-36254-34471-32579-30599-28565-26534 

45.7 52.6 57.8 60.9 61.6 60.1 56.9 53.0 49.1 46.1 44.4 44.1 45.0 46.8 48.9 50.9 52.5 53.4 53.2 

-57322-56118-54906-53699-52501-51308-50111-48892-47628-46299-44882-43360-41723-39966-38093-36120-34075-31999-29948 

53.0 60.1 65.6 69.2 70.6 70.1 68.1 65.1 61.9 59.2 57.4 56.8 57.3 58.8 60.9 63.1 65.1 66.4 66.5 

-60291-59225-58140-57044-55937-54815-53667-52478-51228-49898-48471-46934-45281-43512-41639-39682-37672-35650-33666 

61.2 68.1 73.8 77.9 80.3 81.0 80.4 78.9 77.1 75.3 74.0 73.6 73.9 75.0 76.5 78.2 79.7 80.4 80.0 

-62668-61752-60803-59824-58815-57771-56684-55539-54326-53029-51637-50144-48548-46855-45077-43236-41360-39486-37652 

69.3 75.7 81.2 85.7 88.8 90.8 91.6 91.7 91.2 90.6 90.2 90.1 90.3 90.9 91.7 92.5 92.9 92.7 91.5 

-64231-63475-62671-61821-60924-59977-58975-57909-56773-55559-54264-52884-51422-49887-48291-46653-44995-43344-41730 

76.6 82.0 87.0 91.3 94.7 97.4 99.3 100.5 101.3 101.7 102.0 102.2 102.4 102.6 102.8 102.7 102.2 101.2 99.4 

-64755-64166-63518-62813-62051-61232-60353-59413-58409-57340-56205-55007-53751-52445-51099-49727-48345-46972-45627 

82.6 86.7 90.6 94.2 97.4 100.1 102.4 104.1 105.5 106.5 107.2 107.7 107.9 107.9 107.7 107.2 106.3 105.0 103.3 

-64081-63659-63177-62635-62037-61383-60674-59911-59097-58231-57319-56363-55368-54342-53292-52228-51159-50098-49054 

87.2 89.8 92.4 95.0 97.4 99.5 101.4 103.1 104.4 105.5 106.3 106.9 107.2 107.2 107.0 106.6 105.9 104.9 103.8 

-62166-61905-61592-61229-60820-60365-59868-59331-58756-58146-57505-56836-56145-55435-54712-53981-53248-52519-51801 

90.8 92.1 93.5 94.9 96.2 97.5 98.7 99.8 100.7 101.5 102.2 102.6 103.0 103.2 103.2 103.1 102.8 102.5 102.1 

-59109-58989-58840-58662-58457-58226-57970-57693-57394-57078-56745-56398-56040-55673-55299-54922-54545-54169-53798 

94.3 94.7 95.2 95.6 96.1 96.5 96.9 97.4 97.8 98.1 98.5 98.8 99.0 99.3 99.4 99.6 99.7 99.8 99.8 

-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121 

98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 
LONG 

LAT 

0 

-5 

-10 

-15 

-20 

-25 

-30 

-35 

-40 01 

w 

-45 

-50 

-55 

-60 

-65 

-70 

-75 

-80 

-85 

-90 

IGRF 1980 VERTICAL INTENSITY (Z) 

-90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

10554 11621 12450 12912 12901 12345 11225 9568 7446 4962 2237 -592 -3382 -5989 -8286-10183-11655-12744-13542 

44.3 24.2 3.7 -17.9 -41.9 -69.9-101.8-135.2-165.9-189.3-201.8-202.3-192.7-177.1-160.3-146.0-135.7-128.1-120.5 

5080 6233 7172 7762 7888 7473 6488 4961 2962 596 -2013 -4731 -7424 -9960-12232-14168-15754-17027-18057 

53.8 35.0 16.4 -3.0 -25.2 -52.1 -83.6-117.3-148.7-172.8-185.8-186.4-176.7-160.9-144.1-130.3-121.0-114.8-108.4 

-83 1139 2175 2886 3151 2886 2062 703 -1117 -3291 -5694 -8198-10682-13038-15184-17073-18698-20089-21290 

55.5 38.4 22.0 5.1 -14.6 -39.2 -68.5-100.3-130.0-152.6-164.3-164.1-153.8-137.8-121.3-107.9 -99.1 -93.6 -87.8 

-4881 -3589 -2456 -1621 -1209 -1305 -1946 -3105 -4707 -6644 -8788-11020-13232-15342-17294-19061-20646-22065-23335 

51.5 36.4 22.4 8. 1 -8.9 -30.4 -56.5 -84.8-111.1-130.8-140.3-138.8-128.0-112.1 -95.8 -82.7 -73.9 -68.0 -61.9 

-9277 -7900 -6658 -5688 -5116 -5032 -5472 -6414 -7781 -9462-11334-13280-15207-17051-18775-20370-21838-23187-24409 

44.7 32.0 20.5 8.6 -5.8 -24.3 -46.7 -70.9 -93.2-109.4-116.6-113.8-102.9 -87.5 -71.6 -58.3 -48.8 -41.7 -34.2 

-13261-11772-10405 -9291 -8555 -8285 -8521 -9240-10370-11800-13410-15089-16749-18338-19831-21224-22518-23712-24786 

38.2 28.3 19. 1 9. 3 -2.9 -18.6 -37.7 -58.0 -76.5 -89.6 -94.8 -91.5 -81.0 -66.3 -50.8 -37.2 -26.2 -17.1 -7.6 

-16863-15239-13736-12479-11584-11136-11173-11675-12574-13765-15131-16567-17989-19348-20620-21801-22889-23878-24745 

34.6 27.6 20.6 12.4 1.9 -11.8 -28.1 -45.4 -60.8 -71.6 -75.6 -72.3 -62.7 -49.1 -34.1 -19.8 -7.1 4.4 16.2 

-20170-18407-16774-15386-14348-13737-13587-13880-14553-15509-16642-17850-19053-20200-21266-22239-23117-23890-24543 

35.9 31.4 26.1 19.2 9.7 -2.6 -17.0 -32.0 -45.3 -54.5 -58.1 -55.3 -47.0 -34.6 -20.1 -5.2 9.2 23.0 36.8 

-23332-21449-19711-18219-17065-16311-15987-16075-16519-17236-18128-19105-20090-21032-21900-22679-23362-23944-24420 

42.4 39.7 35.6 29.4 20.6 9.3 -3.8 -17.2 -28.9 -37.3 -40.7 -38.7 -31.6 -20.5 -6.6 8.5 24.1 39.5 54.6 

-26534-24578-22779-21222-19981-19107-18620-18504-18713-19175-19811-20540-21294-22025-22698-23298-23816-24251-24606 

53.2 51.5 48.0 42.1 33.8 23.2 11.4 -0.6 -11.1 -18.6 -22.0 -20.7 -14.7 -4.7 8.3 23.2 39.0 54.9 70.3 

-29948-27985-26182-24606-23313-22341-21704-21389-21358-21556-21919-22384-22893-23403-23884-24319-24701-25032-25323 

66.5 65.0 61.5 55.9 48.0 38.4 27.9 17.5 8.4 1.9 -1.2 -0.1 5.0 13.8 25.6 39.5 54.5 69.7 84.2 

-33666-31773-30027-28480-27173-26133-25369-24870-24610-24550-24642-24840-25101-25390-25684-25968-26238-26497-26758 

80.0 78.2 74.5 69.1 62.0 53.7 44.8 36.3 28.9 23.8 21.4 22.4 26.8 34.4 44.6 56.8 70.0 83.4 96.1 

-37652-35900-34273-32806-31529-30460-29606-28960-28506-28218-28068-28023-28056-28142-28265-28415-28590-28794-29037 

91.5 89.2 85.5 80.6 74.6 67.9 61.0 54.6 49.2 45.6 44.2 45.4 49.1 55.4 63.7 73.5 84.3 95.1 105.3 

-41730-40181-38727-37392-36195-35149-34260-33527-32940-32488-32153-31920-31771-31693-31677-31716-31811-31966-32188 

99.4 96.9 93.6 89.6 85.0 80.1 75.4 71.1 67.7 65.6 65.1 66.4 69.4 74.2 80.4 87.7 95.6 103.6 111.1 

-45627-44328-43094-41940-40878-39920-39068-38327-37692-37161-36727-36383-36122-35939-35829-35792-35827-35938-36129 

103.3 101.2 98.6 95.8 92.7 89.7 86.9 84.5 82.7 81.8 82.0 83.2 85.5 88.8 93.0 97.8 102.9 108.1 113.1 

-49054-48040-47066-46140-45273-44470-43736-43074-42487-41976-41539-41176-40886-40668-40522-40448-40448-40524-40677 

103.8 102.4 100.9 99.3 97.7 96.2 94.9 93.9 93.3 93.1 93.5 94.5 96.0 98.0 100.4 103.1 106.0 108.9 111.6 

-51801-51099-50420-49768-49148-48566-48025-47528-47079-46680-46332-46038-45798-45614-45487-45419-45409-45459-45571 

102.1 101.6 101.0 100.5 100.0 99.6 99.3 99.1 99.1 99.2 99.6 100.2 101.0 101.9 103.0 104.2 105.5 106.7 107.9 

-53798-53434-53080-52740-52414-52106-51818-51552-51310-51094-50904-50743-50612-50512-50444-50408-50405-50435-50498 

99.8 99.9 99.9 100.0 100.0 100.1 100.2 100.3 100.5 100.6 100.8 101.1 101.3 101.6 101.9 102.2 102.5 102.8 103.1 

-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121-55121 

98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 98.4 
~ 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 TOTAL INTENSITY (F) 

0 5 10 15 20 25 30 35 40 45 so 55 60 65 70 75 80 85 90 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

55713 55741 55782 55835 55900 55975 56061 56156 56259 56368 56481 56598 56716 56834 56949 57061 57168 57268 57360 

12.0 12.3 12.5 12.7 12.8 12.8 12.8 12.7 12.5 12.3 11.9 11.5 11.1 10.5 9.9 9.3 8.6 7.9 7.2 

54557 54595 54667 54771 54906 55072 55265 55484 55725 55984 56257 56539 56826 57111 57391 57658 57909 58138 58341 

17.2 18.1 18.9 19.5 20.0 20.4 20.6 20.6 20.4 20.0 19.4 18.7 17.7 16.6 15.4 14.0 12.5 10.9 9.3 

53407 53436 53520 53659 53851 54095 54388 54726 55105 55519 55962 56426 56901 57378 57846 58295 58713 59091 59418 

20.0 21.6 23.1 24.4 25.5 26.4 27.0 27.3 27.2 26.8 26.1 25.1 23.7 22.1 20.2 18.1 15.9 13.5 11.0 

52308 52319 52403 52561 52789 53089 53455 53887 54378 54923 55514 56141 56793 57453 58108 58738 59327 59855 60308 

20.0 22.4 24.6 26.7 28.4 29.8 30.8 31.3 31.4 31.0 30.2 28.9 27.2 25.2 22.9 20.4 17.6 14.8 11.8 

51238 51236 51321 51491 51744 52078 52491 52981 53545 54179 54876 55625 56414 57224 58035 58823 59561 60224 60786 

17.9 21.0 23.9 26.5 28.7 30.5 31.7 32.4 32.5 32.0 30.9 29.3 27.4 25.1 22.5 19.8 16.9 14.0 11.1 

50127 50133 50233 50423 50699 51058 51498 52019 52618 53296 54048 54866 55738 56645 57563 58463 59311 60073 60715 

15.0 18.6 21.9 24.9 27.4 29.3 30.6 31.1 30.9 30.0 28.5 26.6 24.3 21.8 19.1 16.4 13.8 11.2 8.8 

48899 48937 49072 49298 49606 49992 50451 50983 51591 52276 53038 53873 54773 55718 56684 57638 58543 59357 60040 

12.6 16.5 20.1 23.3 25.9 27.7 28.7 28.7 28.0 26.5 24.4 21.9 19.1 16.3 13.6 11.1 8.9 7.0 5.4 

47495 47584 47772 48047 48398 48815 49293 49832 50433 51103 51844 52658 53536 54465 55421 56370 57274 58087 58766 

11.5 15.6 19.4 22.7 25.2 26.8 27.3 26.8 25.3 23.0 20.0 16.8 13.5 10.3 7.5 5.1 3.4 2.3 1.9 

45 45885 46034 46281 46610 47006 47457 47957 48501 49094 49741 50447 51214 52039 52910 53806 54697 55546 56310 56943 

11.5 16.0 20.0 23.4 25.8 27.2 27.2 26.0 23.7 20.5 16.8 12.8 8.9 5.4 2.4 0.1 -1.3 -1.7 -1.1 

40 44061 44270 44572 44949 45386 45868 46386 46937 47523 48148 48816 49529 50284 51071 51874 52668 53421 54096 54651 

12.2 16.9 21.1 24.7 27.2 28.3 28.0 26.2 23.2 19.3 15.0 10.5 6.3 2.4 -0.8 -3.1 -4.2 -4.2 -2.8 

35 42044 42305 42652 43067 43532 44034 44563 45118 45698 46305 46939 47598 48280 48975 49669 50346 50982 51546 52005 

12.5 17.5 22.0 25.6 28.1 29.1 28.5 26.3 22.9 18.7 14.1 9.5 5.2 1.3 -1.9 -4.2 -5.3 -4.9 -3.1 

30 39886 40193 40576 41016 41495 42001 42530 43079 43648 44236 44838 45451 46066 46675 47267 47831 48351 48805 49167 

12.2 17.2 21.6 25.2 27.5 28.3 27.4 25.0 21.4 17.2 12.9 8.6 4.7 1.2 -1.8 -3.9 -4.9 -4.3 -2.2 

25 37693 38042 38454 38908 39388 39886 40397 40925 41470 42030 42601 43173 43736 44281 44797 45277 45708 46077 46363 

11.6 16.2 20.0 23.0 24.7 25.0 23.7 21.0 17.6 13.7 9.9 6.4 3.2 0.4 -1.9 -3.6 -4.1 -3.2 -0.8 

20 35620 36012 36451 36916 37391 37867 38344 38829 39329 39846 40379 40918 41452 41968 42454 42900 43295 43623 43868 

11.4 15.1 17.9 19.5 19.9 19.1 17.0 14.0 10.6 7.3 4.2 1.6 -0.5 -2.4 -3.8 -4.5 -4.3 -2.8 0.3 

15 33849 34289 34761 35241 35709 36156 36582 37000 37429 37885 38373 38891 39425 39960 40477 40957 41381 41728 41980 

12.7 15.1 16.0 15.5 13.8 11.1 7.6 4.0 0.5 -2.4 -4.7 -6.3 -7.4 -8.1 -8.4 -7.8 -6.3 -3.5 0.5 

10 32519 33020 33538 34043 34510 34923 35284 35615 35952 36330 36774 37289 37865 38476 39092 39679 40204 40633 40941 

15.1 16.0 14.8 11.6 6.9 1.5 -3.9 -8.7 -12.4 -15.0 -16.5 -17.1 -17.2 -16.7 -15.5 -13.3 -9.9 -5.3 0.3 

5 31654 32236 32815 33358 33829 34207 34494 34727 34964 35268 35684 36232 36897 37644 38426 39188 39878 40447 40859 

17.2 16.7 13.2 6.9 -1.0 -9.6 -17.4 -23.5 -27.6 -29.6 -30.1 -29.6 -28.4 -26.5 -23.7 -19.5 -13.9 -7.1 0.5 

0 31148 31822 32472 33056 33530 33867 34080 34221 34375 34634 35065 35695 36506 37448 38452 39443 40349 41107 41666 

16.6 14.9 9.3 0.3 -11.0 -22.6 -32.7 -40.1 -44.1 -45.1 -44.0 -41.7 -38.7 -35.0 -30.3 -24.1 -16.4 -7.4 2.1 
01 

01 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 TOTAL INTENSITY (F) 

90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 1 7 5 180 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

57360 57442 57515 57578 57630 57670 57700 57720 57730 57731 57723 57709 57689 57664 57636 57605 57572 57539 57505 

7.2 6.4 5.7 4.9 4.2 3.4 2.8 2.1 1.5 1.0 0.5 0.1 -0.3 -0.6 -0.8 -0.9 -1.0 -1.1 -1.0 

58341 58515 58656 58763 58836 58874 58879 58853 58800 58724 58629 58521 58404 58284 58167 58055 57954 57866 57793 

9.3 7.6 5.9 4.2 2.6 1.0 -0.4 -1.8 -3.0 -4.1 -4.9 -5.7 -6.2 -6.6 -6.8 -6.8 -6.7 -6.5 -6.1 

59418 59687 59892 60028 60094 60091 60022 59893 59713 59490 59236 58963 58684 58410 58154 57925 57732 57581 57478 

11.0 8.5 6.0 3.5 1.1 -1.2 -3.3 -5.3 -7.0 -8.4 -9.6 -10.5 -11.1 -11.4 -11.4 -11.1 -10.6 -9.9 -9.0 

60308 60669 60928 61077 61113 61038 60857 60580 60223 59802 59338 58852 58366 57902 57478 57113 56820 56610 56490 

11.8 8.8 5.8 2.9 o.o -2.6 -5.2 -7.4 -9.4 -11.1 -12.4 -13.4 -13.9 -14.1 -13.9 -13.2 -12.3 -11.1 -9.7 

60786 61225 61523 61668 61655 61484 61166 60715 60153 59508 58809 58089 57379 56712 56114 55612 55224 54966 54846 

11.1 8.1 5.2 2.4 -0.3 -3.0 -5.4 -7.6 -9.6 -11.3 -12.6 -13.6 -14.1 -14.2 -13.9 -13.1 -12.0 -10.5 -8.8 

60715 61207 61524 61647 61570 61292 60827 60194 59424 58553 57621 56671 55747 54888 54131 53507 53040 52747 52637 

8.8 6.5 4.2 2.1 0.1 -1.9 -3.8 -5.6 -7.3 -8.7 -9.9 -10.9 -11.5 -11.7 -11.6 -11.1 -10.2 -8.9 -7.2 

60040 60553 60865 60952 60804 60420 59814 59011 58049 56973 55833 54682 53573 52554 51668 50949 50424 50109 50014 

5.4 4.2 3.2 2.2 1.3 0.4 -0.6 -1.6 -2.7 -3.7 -4.7 -5.7 -6.5 -7.1 -7.6 -7.8 -7.6 -6.9 -5.9 

58766 59267 59552 59595 59378 58901 58176 57233 56115 54873 53567 52260 51011 49876 48900 48120 47563 47242 47165 

1.9 1.9 2.3 2.9 3.4 3.8 3.9 3.8 3.4 2.8 2.1 1.2 0.1 -1.1 -2.5 -3.8 -4.8 -5.4 -5.4 

45 56943 57401 57643 57638 57364 56817 56009 54970 53744 52390 50974 49566 48232 47030 46011 45209 44648 44339 44282 

-1.1 0.2 2.1 4.1 6.1 7.8 9.0 9.7 9.9 9.8 9.2 8.4 7.0 5.2 2.8 0.2 -2.4 -4.5 -5.9 

40 54651 55043 55232 55183 54870 54285 53435 52350 51074 49670 48207 46760 45399 44187 43172 42388 41854 41575 41545 

-2.8 -0.4 2.7 6.0 9.2 11.9 13.8 15.1 15.7 15.8 15.4 14.6 13.1 10.7 7.5 3.7 -0.5 -4.3 -7.1 

35 52005 52320 52453 52368 52036 51445 50598 49519 48254 46863 45418 43996 42668 41497 40531 39802 39322 39091 39094 

-3.1 0.1 4.1 8.3 12.3 15.6 17.9 19.2 19.8 19.9 19.6 18.8 17.2 14.7 10.9 6.1 0.7 -4.6 -8.7 

30 49167 49407 49489 49379 49048 48480 47673 46649 45449 44131 42765 41426 40183 39098 38217 37569 37163 36989 37026 

-2.2 1.4 5.9 10.7 15.1 18.5 20.7 21.7 22.0 21.8 21.3 20.6 19.1 16.6 12.6 7.3 1.1 -5.0 -10.2 

25 46363 46542 46584 46460 46143 45616 44878 43945 42854 41658 40420 39208 38090 37121 36345 35787 35454 35332 35392 

-0.8 3.1 7.9 12.8 17.2 20.4 22.1 22.7 22.4 21.8 21.1 20.3 19.0 16.6 12.8 7.4 1.0 -5.6 -11.2 

20 43868 44011 44028 43898 43601 43126 42470 41650 40696 39651 38571 37513 36536 35691 35017 34538 34257 34160 34215 

0.3 4.5 9.5 14.4 18.6 21.4 22.7 22.7 22.0 21.0 20.0 19.0 17.6 15.3 11.6 6.5 0.3 -6.1 -11.8 

15 41980 42118 42127 41995 41717 41290 40719 40017 39207 38324 37407 36504 35663 34927 34331 33897 33629 33512 33518 

0.5 5.5 10.8 15.7 19.6 22.0 23.0 22.7 21.6 20.3 19.0 17.6 15.9 13.4 9.8 5.0 -0.8 -6.8 -12~3 

10 40941 41107 41125 40997 40733 40346 39849 39257 38584 37851 37083 36315 35583 34924 34367 33934 33627 33438 33343 

0.3 6.4 12.2 17.3 20.9 23.1 23.8 23.3 22.0 20.4 18.6 16.7 14.3 11.4 7.7 3.1 -2.3 -7.9 -13.1 

5 40859 41090 41140 41026 40776 40422 39988 39490 38934 38328 37682 37016 36357 35735 35177 34699 34308 33998 33755 

0.5 8.0 14.7 20.0 23.5 25.4 25.7 24.9 23.3 21.2 18.8 16.0 12.9 9.3 5.3 0.7 -4.3 -9.5 -14.4 

0 41666 42002 42117 42040 41818 41500 41122 40704 40245 39739 39183 38587 37967 37350 36756 36202 35694 35232 34811 

2.1 11.1 18.7 24.3 27.7 29.1 28.8 27.3 24.9 22.0 18.6 14.8 10.9 6.7 2.5 -2.0 -6.7 -11.7 -16.6 
<.11 

0. 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

so 

IGRF 1980 TOTAL INTENSITY (F) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

57505 57472 57439 57407 57375 57343 57312 57279 57245 57210 57171 57130 57085 57035 56980 56921 56857 56788 56715 

-1.0 -1.0 -0.8 -0.7 -0.5 -0.2 o.o 0.3 0.6 0.9 1.3 1.6 2.0 2.3 2.7 3.1 3.5 3.8 4.2 

57793 57737 57699 57676 57668 57673 57687 57707 57729 57748 57761 57764 57754 57727 57681 57614 57525 57415 57282 

-6.1 -5.6 -5.1 -4.5 -3.9 -3.3 -2.7 -2.0 -1.5 -0.9 -0.4 0.1 0.5 1.0 1.4 1.8 2.2 2.6 3.0 

57478 57423 57417 57456 57537 57652 57793 57951 58116 58279 58429 58556 58654 58714 58732 58702 58623 58493 58314 

-9.0 -8.0 -6.9 -5.8 -4.7 -3.7 -2.8 -2.1 -1.4 -0.9 -0.5 -0.2 0.0 0.1 0.2 0.2 0.3 0.4 o.s 

56490 56463 56526 56673 56895 57180 57512 57875 58250 58621 58971 59283 59543 59740 59864 59908 59868 59743 59534 

-9.7 -8.1 -6.5 -5.0 -3.6 -2.4 -1.s -o.8 -o.s -0.4 -0.6 -1.0 -1.s -2.o -2.6 -3.2 -3.7 -4.2 -4.5 

54846 54865 55020 55301 55694 56178 56731 57329 57945 58556 59135 59662 60116 60481 60742 60891 60921 60828 60613 

-8.8 -6.9 -5.0 -3.2 -1.7 -0.5 0.1 0.3 -0.1 -0.9 -2.0 -3.5 -5.1 -6.7 -8.3 -9.7 -11.1 -12.2 -13.2 

52637 52710 52961 53376 53934 54611 55378 56202 57052 57895 58702 59445 60099 60644 61063 61341 61469 61440 61252 

-7.2 -5.3 -3.4 -1.6 -0.1 0.7 0.9 0.3 -1.0 -3.1 -5.6 -8.4 -11.4 -14.3 -17.1 -19.7 -22.0 -24.0 -25.7 

50014 50137 50470 50995 51688 52522 53461 54470 55512 56551 57553 58488 59327 60048 60629 61052 61303 61369 61243 

-5.9 -4.4 -2.7 -1.1 0.2 0.7 0.3 -1.1 -3.6 -7.0 -11.1 -15.5 -20.0 -24.4 -28.5 -32.3 -35.7 -38.8 -41.4 

47165 47326 47715 48312 49093 50027 51078 52209 53382 54558 55703 56785 57776 58650 59383 59953 60339 60522 60487 

-5.4 -4.7 -3.5 -2.1 -1.1 -0.8 -1.7 -3.9 -7.6 -12.3 -17.9 -23.9 -29.8 -35.6 -41.0 -46.0 -50.6 -54.9 -58.8 

45 44282 44470 44888 45516 46331 47302 48397 49580 50813 52059 53284 54458 55552 56541 57399 58100 58616 58921 58990 

-5.9 -6.2 -5.7 -4.6 -3.7 -3.5 -4.8 -7.7 -12.3 -18.3 -25.1 -32.3 -39.4 -46.3 -52.7 -58.8 -64.6 -70.3 -75.7 

40 41545 41750 42173 42794 43592 44542 45617 46783 48008 49257 50497 51701 52842 53895 54835 55632 56253 56664 56832 

-7.1 -8.6 -8.8 -8.0 -7.2 -7.1 -8.6 -12.0 -17.4 -24.2 -31.9 -39.8 -47.5 -54.8 -61.8 -68.6 -75.6 -82.6 -89.7 

35 39094 39311 39720 40302 41041 41920 42918 44009 45166 46355 47549 48722 49850 50910 51877 52721 53405 53891 54139 

-8.7 -11.3 -12.1 -11.7 -11.0 -11.0 -12.8 -16.6 -22.4 -29.7 -37.7 -45.7 -53.2 -60.2 -67.1 -74.1 -81.8 -90.1 -98.8 

30 37026 37246 37625 38143 38789 39556 40432 41400 42437 43516 44609 45695 46751 47759 48696 49532 50231 50751 51049 

-10.2 -13.6 -15.0 -15.0 -14.6 -15.0 -17.1 -21.4 -27.5 -34.8 -42.5 -49.7 -56.1 -62.1 -68.0 -74.7 -82.5 -91.6-101.7 

25 35392 35601 35930 36360 36887 37510 38230 39038 39916 40841 41789 42739 43674 44577 45431 46208 46874 47387 47703 

-11.2 -15.1 -17.1 -17.7 -17.9 -18.8 -21.5 -26.2 -32.5 -39.5 -46.2 -51.9 -56.6 -60.7 -65.1 -70.7 -78.2 -87.6 -98.4 

20 34215 34385 34640 34960 35345 35803 36343 36964 37654 38394 39161 39938 40711 41469 42198 42874 43467 43938 44245 

-11.8 -16.0 -18.5 -19.7 -20.7 -22.5 -25.9 -31.0 -37.2 -43.5 -48.8 -52.7 -55.1 -57.0 -59.5 -63.6 -70.1 -79.2 -90.1 

15 33518 33610 33758 33945 34171 34450 34796 35214 35697 36228 36790 37368 37953 38538 39112 39658 40147 40547 40817 

-12.3 -16.6 -19.5 -21.4 -23.3 -26.0 -30.1 -35.4 -41.2 -46.5 -50.3 -52.3 -52.6 -52.3 -52.8 -55.2 -60.4 -68.4 -78.6 

10 33343 33312 33319 33348 33401 33493 33639 33846 34111 34421 34765 35130 35513 35908 36310 36703 37065 37366 37572 

-13.1 -17.4 -20.7 -23.3 -26.0 -29.4 -33.8 -38.9 -44.1 -48.3 -50.7 -51.0 -49.8 -47.9 -46.8 -47.7 -51.2 -57.6 -66.4 

5 33755 33559 33391 33242 33112 33013 32957 32951 32993 33079 33199 33348 33523 33724 33942 34168 34380 34553 34661 

-14.4 -18.9 -22.6 -25.9 -29.1 -32.7 -36.9 -41.3 -45.5 -48.5 -49.9 -49.4 -47.4 -44.8 -42.8 -42.3 -44.2 -48.7 -55.3 

0 34811 34422 34059 33717 33397 33106 32849 32631 32453 32314 32213 32148 32120 32125 32157 32201 32241 32256 32225 

-16.6 -21.2 -25.4 -29.2 -32.6 -36.0 -39.3 -42.6 -45.5 -47.6 -48.4 -47.8 -46.0 -43.5 -41.2 -39.8 -40.2 -42.6 -46.9 
<.n 

....... 

LONG 

LAT 

90 

85 

80 

75 

70 

65 

60 

55 

50 

IGRF 1980 TOTAL INTENSITY (F) 

-90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

56715 56637 56557 56474 56389 56304 56220 56137 56058 55984 55916 55855 55802 55759 55726 55704 55695 55697 55713 

4.2 4.6 5.1 5.5 5.9 6.4 6.8 7.3 7.8 8.2 8.7 9.2 9.6 10.1 10.5 11.0 11.4 11.7 12.0 

57282 57130 56959 56772 56572 56363 56148 55932 55719 55513 55318 55138 54976 54837 54722 54635 54578 54551 54557 

3.0 3.4 3.9 4.4 5.0 5.6 6.2 6.9 7.7 8.5 9.4 10.3 11.3 12.3 13.3 14.3 15.3 16.3 17.2 

58314 58089 57820 57515 57178 56818 56441 56058 55675 55301 54944 54611 54309 54043 53818 53640 53510 53431 53407 

0.5 0.7 1.0 1.3 1.8 2.4 3.0 3.9 4.8 5.9 7.1 8.4 9.9 11.5 13.1 14.8 16.5 18.3 20.0 

59534 59245 58882 58455 57973 57449 56897 56329 55761 55204 54673 54176 53724 53326 52987 52712 52506 52371 52308 

-4.5 -4.7 -4.8 -4.7 -4.4 -3.9 -3.2 -2.2 -1.1 0.3 1.9 3.7 5.7 7.8 10.1 12.5 15.0 17.5 20.0 

60613 60281 59840 59302 58682 57998 57269 56518 55764 55027 54325 53673 53083 52566 52127 51773 51506 51328 51238 

-13.2 -13.9 -14.3 -14.5 -14.3 -13.7 -12.8 -11.5 -9.9 -7.9 -5.7 -3.2 -0.5 2.4 5.3 8.4 11.6 14.8 17.9 

61252 60909 60418 59793 59054 58224 57332 56407 55479 54576 53722 52936 52234 51625 51118 50714 50415 50220 50127 

-25.7 -27.0 -27.9 -28.3 -28.2 -27.4 -26.0 -24.0 -21.4 -18.4 -15.0 -11.4 -7.6 -3.8 0.0 3.8 7.6 11.4 15.0 

61243 60924 60418 59738 58907 57955 56919 55841 54759 53713 52734 51846 51066 50403 49863 49444 49147 48967 48899 

-41.4 -43.6 -45.1 -45.9 -45.8 -44.7 -42.5 -39.3 -35.2 -30.5 -25.3 -20.0 -14.7 -9.6 -4.7 -0.1 4.3 8.5 12.6 

60487 60225 59737 59035 58143 57097 55945 54739 53533 52375 51306 50353 49534 48857 48320 47921 47655 47516 47495 

-58.8 -62.1 -64.7 -66.1 -66.1 -64.6 -61.4 -56.7 -50.7 -43.7 -36.2 -28.6 -21.2 -14.4 -8.3 -2.7 2.3 7.0 11.5 

45 58990 58806 58363 57668 56746 55639 54404 53104 51808 50575 49454 48476 47656 46998 46497 46143 45929 45846 45885 

-75.7 -80.5 -84.4 -86.8 -87.3 -85.5 -81.5 -75.1 -67.0 -57.4 -47.2 -36.9 -27.2 -18.4 -10.8 -4.2 1.6 6.8 11.5 

40 56832 56732 56350 55686 54766 53634 52354 51001 49654 48385 47249 46279 45489 44876 44429 44135 43982 43961 44061 

-89.7 -96.3-101.8-105.6-106.9-105.3-100.6 -93.0 -82.9 -70.9 -58.0 -45.1 -32.9 -22.1 -12.8 -5.1 1.4 7.0 12.2 

35 54139 54115 53799 53187 52299 51179 49896 48533 47177 45909 44788 43850 43107 42550 42165 41935 41846 41886 42044 

-98.8-107.2-114.6-120.0-122.5-121.5-116.8-108.5 -97.1 -83.4 -68.3 -53.1 -38.7 -25.9 -15.1 -6.3 1.0 7.1 12.5 

30 51049 51086 50836 50289 49460 48391 47148 45818 44492 43255 42172 41280 40590 40092 39770 39603 39576 39675 39886 

-101.7-111.8-121.0-128.0-131.9-132.1-128.1-120.1-108.4 -93.8 -77.5 -60.6 -44.4 -29.9 -17.7 -7.8 0.2 6.7 12.2 

25 47703 47783 47594 47123 46376 45390 44224 42964 41701 40522 39495 38658 38026 37590 37332 37231 37269 37429 37693 

-98.4-109.7-120.2-128.7-134.2-135.8-133.2-126.4-115.5-101.1 -84.4 -66.5 -49.1 -33.2 -19.8 -9.0 -0.5 6.1 11.6 

20 44245 44347 44211 43817 43166 42284 41224 40064 38892 37794 36840 36075 35516 35156 34979 34959 35073 35300 35620 

-90.1-101.8-113.0-122.5-129.2-132.4-131.6-126.6-117.3-104.0 -87.6 -69.5 -51.3 -34.5 -20.3 -8.8 -0.1 6.5 11.4 

15 40817 40920 40821 40497 39941 39172 38233 37193 36135 35143 34291 33626 33171 32922 32857 32945 33156 33465 33849 

-78.6 -89.9-101.0-110.7-118.2-122.8-123.9-121.0-113.6-101.7 -86.1 -68.1 -49.7 -32.6 -17.9 -6.3 2.3 8.5 12.7 

10 37572 37647 37559 37282 36807 36144 35328 34420 33497 32642 31926 31404 31097 31001 31086 31315 31647 32055 32519 

-66.4 -76.3 -86.5 -95.7-103.4-108.9-111.4-110.2-104.5 -94.0 -79.2 -61.9 -43.9 -27.2 -13.1 -2.0 6.3 11.9 15.1 

5 34661 34671 34555 34291 33867 33290 32589 31819 31050 30360 29820 29479 29359 29448 29711 30099 30570 31094 31654 

-55.3 -63.4 -71.9 -80.1 -87.3 -92.9 -96.1 -95.8 -91.1 -81.6 -67.8 -51.6 -35.0 -20.0 -7.5 2.4 9.8 14.8 17.2 

0 32225 32125 31934 31637 31224 30704 30103 29471 28869 28367 28027 27890 27969 28248 28684 29227 29835 30480 31148 

-46.9 -52.7 -59.3 -66.0 -72.2 -77.2 -80.1 -79.8 -75.3 -66.3 -53.7 -39.5 -25.6 -13.5 -3.7 4.2 10.5 14.8 16.6 
<.11 

(X) 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 

LAT 

0 31148 31822 32472 33056 33530 33867 34080 34221 34375 34634 35065 35695 36506 37448 38452 39443 40349 41107 41666 

16.6 14.9 9.3 0.3 -11.0 -22.6 -32.7 -40.1 -44.1 -45.1 -44.0 -41.7 -38.7 -35.0 -30.3 -24.1 -16.4 -7.4 2.1 

-5 30812 31570 32279 32888 33348 33637 33781 33854 33969 34239 34750 35527 36544 37732 39002 40261 41420 42404 43153 

11.5 8.8 1.5 -9.9 -23.7 -37.8 -49.5 -57.3 -60.5 -59.6 -56.0 -51.0 -45.5 -39.7 -33.0 -25.1 -15.8 -5.2 5.6 

-10 30463 31267 31995 32590 33008 33240 33329 33375 33513 33872 34539 35533 36811 38284 39850 41400 42837 44075 45049 

1.4 -2.3 -10.8 -23.8 -39.2 -54.5 -66.7 -73.8 -75.0 -71.1 -64.0 -55.5 -47.0 -38.9 -30.6 -21.7 -11.7 -0.8 10.3 

-15 29990 30776 31462 31994 32339 32508 32568 32641 32875 33403 34301 35570 37148 38931 40803 42651 44374 45882 47108 

-12.5 -17.4 -26.9 -40.6 -56.4 -71.3 -82.4 -87.3 -85.3 -77.4 -66.1 -53.9 -42.4 -32.4 -23.3 -14.4 -5.1 4.9 14.9 

-20 29371 30068 30650 31074 31327 31443 31514 31676 32080 32846 34029 35607 37498 39587 41754 43887 45885 47661 49147 

-28.7 -34.9 -45.1 -58.6 -73.4 -86.4 -94.7 -95.9 -89.6 -77.3 -61.8 -46.3 -32.6 -21.6 -12.7 -5.1 2.3 9.9 17.6 

-25 28665 29216 29653 29950 30118 30216 30353 30668 31302 32349 33836 35718 37898 40259 42683 45064 47306 49327 51059 

-45.3 -53.0 -63.5 -76.0 -88.5 -98.1-102.1 -98.6 -87.5 -71.0 -52.3 -34.7 -20.1 -9.3 -1.8 3.5 7.9 12.2 16.7 

-30 27982 28369 28658 28849 28973 29110 29374 29897 30793 32125 33892 36030 38440 41009 43628 46198 48633 50855 52801 

-61.3 -70.3 -80.6 -91.3-100.5-105.7-104.6 -96.0 -80.7 -61.2 -40.8 -22.7 -8.7 0.7 6.0 8.4 9.4 10.0 11.0 

-35 27474 27720 27903 28043 28192 28436 28881 29639 30790 32367 34347 36660 39214 41906 44640 47327 49888 52252 54360 

-40 

-75.9 -85.8 -95.4-103.7-109.1-109.5-103.5 -90.8 -72.8 -52.1 -31.9 -14.9 -2.5 4.8 7.6 7.2 5.0 2.5 o.s 

27319 27481 27627 27792 28036 28439 29091 30071 31429 33176 35277 37668 40268 42991 45752 48475 51087 53525 55732 

-89.0 -98.9-107.3-113.1-114.8-111.2-101.7 -86.7 -68.0 -48.1 -29.7 -14.8 -4.7 0.5 1.2 -1.2 -5.5 -10.3 -14.3 

-45 27707 27851 28029 28281 28663 29241 30080 31231 32720 34543 36669 39041 41595 44259 46963 49641 52228 54667 56902 

-100.4-109.5-116.2-119.6-118.5-112.5-101.6 -86.6 -69.2 -51.7 -36.0 -23.7 -15.8 -12.4 -12.9 -16.3 -21.3 -26.8 -31.4 

-so 28808 28980 29229 29590 30108 30831 31801 33046 34578 36389 38450 40719 43145 45672 48241 50797 53283 55647 57840 

-109.4-117.1-122.1-123.6-121.2-114.6-104.3 -91.1 -76.6 -62.3 -49.8 -40.1 -34.1 -31.6 -32.4 -35.6 -40.1 -44.8 -48.8 

-55 30721 30935 31252 31701 32314 33120 34143 35399 36890 38609 40532 42628 44858 47179 49544 51907 54219 56435 58512 

-115.4-121.4-124.9-125.5-123.0-117.3-109.0 -98.7 -87.7 -76.9 -67.5 -60.3 -55.6 -53.5 -53.8 -55.8 -58.8 -61.9 -64.3 

-60 33442 33682 34038 34528 35172 35987 36986 38176 39555 41116 42841 44706 46684 48740 50840 52943 55014 57012 58903 

-118.1-122.3-124.8-125.2-123.3-119.3-113.4-106.4 -98.8 -91.4 -84.8 -79.5 -75.8 -73.7 -73.1 -73.6 -74.6 -75.7 -76.4 

-65 36866 37106 37460 37939 38553 39312 40221 41282 42491 43842 45320 46909 48588 50332 52114 53904 55674 57394 59036 

-117.4-120.3-122.0-122.4-121.3-119.0-115.5-111.3-106.6-101.9 -97.5 -93.7 -90.8 -88.6 -87.2 -86.4 -85.8 -85.1 -84.2 

-70 40816 41033 41351 41776 42314 42967 43737 44622 45619 46721 47918 49197 ,50543 51940 53366 54803 56229 57624 58966 

-114.0-115.8-116.9-117.3-116.9-115.8-114.0-111.7-109.1-106.4-103.6-101.1 -98.7 -96.7 -94.9 -93.2 -91.7 -90.0 -88.3 

-75 45078 45256 45516 45859 46288 46801 47399 48078 48836 49665 50559 51510 52506 53538 54591 55654 56712 57752 58762 

-108.9-109.8-110.4-110.6-110.5-110.0-109.2-108.0-106.7-105.2-103.5-101.8-100.1 -98.4 -96.7 -95.0 -93.2 -91.5 -89.6 

-80 49423 49553 49739 49981 50279 50633 51039 51495 51999 52546 53132 53751 54398 55065 55747 56435 57122 57802 58466 

-103.0-103.3-103.4-103.5-103.3-103.0-102.6-102.0-101.3-100.4 -99.5 -98.5 -97.4 -96.2 -95.0 -93.8 -92.5 -91.2 -89.9 

-85 53619 53691 53791 53918 54072 54252 54456 54683 54931 55199 55484 55783 56094 56415 56742 57073 57404 57733 58057 

-97.4 -97.3 -97.2 -97.1 -96.9 -96.7 -96.4 -96.1 -95.8 -95.4 -94.9 -94.4 -93.9 -93.4 -92.9 -92.3 -91.7 -91.1 -90.6 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
01 

"0 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 90 95 100 105 110 115 120 12 5 130 135 140 145 150 15 5 160 165 17 0 175 180 

LAT 

0 41666 42002 42117 42040 41818 41500 41122 40704 40245 39739 39183 38587 37967 37350 36756 36202 35694 35232 34811 

2.1 11.1 18.7 24.3 27.7 29.1 28.8 27.3 24.9 22.0 18.6 14.8 10.9 6.7 2.5 -2.0 -6.7 -11.7 -16.6 

-5 43153 43637 43860 43860 43697 43432 43115 42767 42386 41957 41467 40914 40309 39673 39026 38381 37745 37122 36515 

5.6 15.6 23.8 29.5 32.7 33.5 32.3 29.7 26.1 21.9 17.3 12.5 7.8 3.3 -1.0 -5.3 -9.7 -14.4 -19.3 

-10 45049 45726 46107 46233 46169 45987 45743 45464 45149 44779 44334 43806 43202 42538 41832 41096 40339 39567 38789 

10.3 20.5 28.7 34.4 37.2 37.2 35.1 31.2 26.3 20.7 14.8 9.1 3.9 -0.8 -5.0 -8.9 -13.0 -17.4 -22.3 

-15 47108 48013 48597 48896 48976 48909 48755 48547 48287 47959 47543 47029 46419 45727 44967 44153 43293 42397 41478 

14.9 24.1 31.7 36.8 39.2 38.7 35.8 31.0 25.0 18.3 11.6 5.3 -0.3 -4.9 -8.9 -12.5 -16.3 -20.5 -25.5 

-20 49147 50301 51118 51626 51883 51957 51908 51771 51558 51259 50859 50349 49730 49014 48213 47339 46402 45413 44388 

17.6 24.9 31.0 35.2 37.1 36.4 33.4 28.5 22.2 15.3 8.3 1.8 -3.8 -8.3 -12.1 -15.6 -19.3 -23.6 -28.5 

-25 51059 52461 53519 54252 54704 54934 54998 54934 54761 54480 54084 53571 52943 52210 51381 50469 49482 48435 47343 

16.7 21.3 25.4 28.5 30.1 29.7 27.3 23.2 17.8 11.6 5.2 -0.8 -6.0 -10.5 -14.3 -17.9 -21.9 -26.4 -31.6 

-30 52801 54426 55710 56660 57308 57697 57877 57886 57750 57482 57087 56568 55933 55190 54349 53420 52413 51340 50221 

11.0 12.7 14.8 16.8 18.2 18.6 17.6 15.3 11.7 7.2 2.3 -2.6 -7.2 -11.4 -15.5 -19.6 -24.2 -29.3 -34.8 

-35 54360 56165 57641 58783 59610 60151 60446 60531 60438 60189 59798 59279 58644 57902 57064 56140 55139 54075 52964 

0.5 -0.4 -0.2 1.0 2.6 4.1 5.0 4.9 3.9 1.8 -1.0 -4.4 -8.1 -12.1 -16.4 -21.2 -26.6 -32.5 -38.6 

-40 55732 57660 59280 60576 61554 62233 62640 62810 62773 62559 62190 61687 61067 60344 59528 58631 57662 56635 55565 

-14.3 -16.8 -17.7 -16.9 -14.9 -12.2 -9.4 -7.1 -5.6 -5.1 -5.7 -7.3 -10.0 -13.6 -18.2 -23.6 -29.8 -36.4 -43.2 

-45 56902 58890 60595 61998 63094 63890 64406 64670 64710 64557 64238 63779 63201 62520 61750 60904 59993 59030 58029 

-31.4 -34.5 -35.7 -34.8 -32.2 -28.5 -24.2 -19.9 -16.2 -13.6 -12.3 -12.4 -14.1 -17.3 -21.9 -27.6 -34.3 -41.5 -48.7 

-50 57840 59818 61547 63004 64177 65066 65683 66048 66186 66124 65889 65509 65006 64400 63706 62939 62112 61238 60328 

-48.8 -51.4 -52.1 -50.7 -47.6 -43.1 -37.9 -32.5 -27.5 -23.6 -21.0 -20.1 -21.0 -23.7 -28.0 -33.8 -40.5 -47.8 -55.2 

-55 58512 60410 62098 63552 64756 65706 66407 66872 67119 67171 67052 66785 66393 65897 65312 64655 63938 63173 62373 

-64.3 -65.6 -65.3 -63.4 -59.8 -55.1 -49.6 -44.0 -38.8 -34.4 -31.4 -30.0 -30.4 -32.6 -36.5 -41.8 -48.1 -55.0 -62.1 

-60 58903 60653 62234 63623 64807 65776 66532 67080 67432 67605 67617 67487 67234 66876 66429 65908 65324 64689 64014 

-76.4 -76.1 -74.8 -72.3 -68.6 -64.1 -59.1 -54.1 -49.4 -45.4 -42.7 -41.3 -41.5 -43.2 -46.5 -51.0 -56.4 -62.5 -68.7 

-65 59036 60573 61983 63247 64352 65289 66055 66651 67084 67363 67501 67509 67403 67196 66901 66530 66094 65602 65061 

-84.2 -82.8 -80.7 -77.9 -74.5 -70.7 -66.6 -62.6 -58.9 -55.9 -53.8 -52.7 -52.9 -54.3 -56.8 -60.3 -64.6 -69.5 -74.5 

-70 58966 60237 61420 62501 63468 64314 65035 65628 66095 66441 66671 66794 66817 66749 66600 66376 66086 65737 65334 

-88.3 -86.3 -83.9 -81.4 -78.5 -75.5 -72.6 -69.8 -67.3 -65.3 -63.9 -63.3 -63.6 -64.6 -66.4 -68.9 -72.0 -75.5 -79.2 

-75 58762 59728 60641 61489 62265 62962 63575 64103 64543 64897 65165 65352 65461 65495 65460 65359 65198 64979 64708 

-89.6 -87.7 -85.8 -83.7 -81.7 -79.7 -77.8 -76.1 -74.7 -73.6 -72.9 -72.6 -72.8 -73.5 -74.7 -76.3 -78.2 -80.4 -82.8 

-80 58466 59108 59722 60302 60842 61338 61787 62186 62533 62826 63066 63251 63384 63464 63494 63474 63407 63295 63138 

-89.9 -88.6 -87.3 -86.1 -84.9 -83.8 -82.8 -82.0 -81.3 -80.8 -80.5 -80.4 -80.6 -81.0 -81.6 -82.4 -83.4 -84.5 -85.8 

-85 58057 58373 58678 58969 59245 59503 59741 59958 60152 60321 60466 60584 60676 60742 60781 60793 60779 60739 60674 

-90.6 -90.0 -89.5 -89.0 -88.6 -88.2 -87.8 -87.5 -87.3 -87.1 -87.0 -87.0 -87.1 -87.2 -87.4 -87.7 -88.0 -88.4 -88.8 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
~ 

LONG 

LAT 

IGRF 1980 TOTAL INTENSITY (F) 

180 -175 -170 -165 -160 -155 -150 -145 -140 -135 -130 -125 -120 -115 -110 -105 -100 -95 -90 

0 34811 34422 34059 33717 33397 33106 32849 32631 32453 32314 32213 32148 32120 32125 32157 32201 32241 32256 32225 

-16.6 -21.2 -25.4 -29.2 -32.6 -36.0 -39.3 -42.6 -45.5 -47.6 -48.4 -47.8 -46.0 -43.5 -41.2 -39.8 -40.2 -42.6 -46.9 

-5 36515 35929 35365 34828 34317 33836 33383 32960 32569 32214 31899 31628 31403 31216 31058 30913 30762 30589 30379 

-19.3 -24.2 -28.8 -32.9 -36.3 -39.0 -41.3 -43.1 -44.8 -46.0 -46.6 -46.4 -45.4 -43.6 -41.6 -39.7 -38.8 -39.3 -41.5 

-10 38789 38019 37269 36547 35856 35195 34558 33945 33357 32802 32289 31825 31410 31037 30689 30347 29991 29607 29187 

-22.3 -27.5 -32.4 -36.6 -39.7 -41.7 -42.7 -43.2 -43.6 -44.0 -44.6 -44.9 -44.8 -44.0 -42.5 -40.6 -38.8 -38.0 -38.6 

-15 41478 40554 39644 38762 37913 37093 36297 35520 34763 34035 33347 32707 32114 31559 31022 30479 29911 29302 28652 

-25.5 -30.7 -35.7 -39.9 -42.6 -43.7 -43.7 -42.9 -42.2 -41.9 -42.3 -43.0 -43.6 -43.6 -42.7 -41.1 -39.2 -37.9 -37.6 

-20 44388 43349 42317 41310 40335 39391 38470 37567 36681 35817 34985 34191 33433 32702 31975 31229 30443 29605 28718 

-28.5 -33.8 -38.8 -42.7 -44.9 -45.3 -44.3 -42.5 -40.8 -39.8 -39.7 -40.3 -41.2 -41.8 -41.6 -40.7 -39.4 -38.3 -38.1 

-25 47343 46230 45119 44030 42971 41944 40942 39957 38985 38026 37084 36161 35255 34354 33439 32488 31484 30418 29300 

-31.6 -36.9 -41.8 -45.3 -47.1 -46.9 -45.1 -42.4 -39.8 -38.0 -37.2 -37.5 -38.3 -39.2 -39.8 -39.9 -39.7 -39.7 -40.2 

-30 50221 49076 47930 46802 45705 44639 43598 42574 41556 40538 39519 38493 37455 36395 35298 34146 32930 31648 30317 

-34.8 -40.3 -45.1 -48.4 -49.7 -49.0 -46.7 -43.4 -40.1 -37.5 -36.0 -35.7 -36.4 -37.6 -39.0 -40.2 -41.5 -42.9 -44.6 

-35 52964 51828 50688 49564 48468 47402 46359 45327 44293 43245 42172 41065 39914 38712 37447 36112 34704 33232 31719 

-40 

-38.6 -44.4 -49.2 -52.4 -53.6 -52.7 -50.1 -46.5 -42.8 -39.6 -37.6 -36.9 -37.4 -38.8 -40.9 -43.3 -45.9 -48.7 -51.5 

55565 54472 53374 52289 51227 50188 49166 48147 47115 46051 44940 43770 42529 41210 39808 38324 36765 35147 33502 

-43.2 -49.4 -54.4 -57.8 -59.1 -58.4 -56.0 -52.6 -48.9 -45.7 -43.4 -42.5 -42.9 -44.5 -47.0 -50.2 -53.8 -57.4 -60.9 

-45 58029 57006 55977 54955 53947 52953 51964 50967 49942 48870 47734 46519 45215 43816 42324 40744 39093 37394 35681 

-48.7 -55.3 -60.7 -64.5 -66.3 -66.2 -64.5 -61.8 -58.6 -55.8 -53.7 -52.8 -53.2 -54.8 -57.5 -60.9 -64.7 -68.5 -71.9 

-50 60328 59396 58454 57510 56568 55626 54675 53702 52689 51617 50471 49236 47904 46473 44949 43342 41672 39966 38257 

-55.2 -62.0 -67.7 -71.9 -74.4 -75.2 -74.6 -73.0 -70.9 -68.9 -67.4 -66.8 -67.2 -68.7 -71.0 -74.1 -77.4 -80.6 -83.3 

-55 62373 61547 60703 59845 58977 58093 57185 56242 55250 54193 53058 51836 50521 49115 47623 46061 44449 42811 41179 

-62.1 -68.7 -74.4 -79.0 -82.2 -84.1 -84.7 -84.4 -83.6 -82.7 -82.0 -81.8 -82.3 -83.5 -85.2 -87.4 -89.7 -91.9 -93.5 

-60 64014 63304 62566 61803 61015 60197 59344 58446 57494 56477 55388 54220 52972 51646 50252 48803 47315 45812 44319 

-68.7 -74.7 -80.2 -84.8 -88.5 -91.2 -92.9 -93.8 -94.2 -94.3 -94.4 -94.7 -95.2 -96.1 -97.2 -98.5 -99.7-100.6-101.1 

-65 65061 64477 63854 63194 62498 61762 60983 60155 59273 58333 57329 56261 55130 53939 52697 51415 50107 48790 47482 

-74.5 -79.6 -84.4 -88.6 -92.3 -95.3 -97.7 -99.4-100.7-101.6-102.4-103.0-103.6-104.2-104.8-105.3-105.6-105.7-105.4 

-70 65334 64881 64382 63838 63251 62619 61941 61216 60443 59619 58745 57821 56851 55839 54792 53718 52627 51532 50443 

-79.2 -83.0 -86.8 -90.3 -93.5 -96.3 -98.7-100.7-102.4-103.7-104.7-105.6-106.2-106.7-107.0-107.1-107.0-106.8-106.2 

-75 64708 64386 64016 63601 63142 62639 62094 61508 60881 60215 59511 58771 58000 57201 56380 55542 54694 53844 52998 

-82.8 -85.3 -87.8 -90.3 -92.6 -94.8 -96.8 -98.6-100.1-101.4-102.4-103.3-103.9-104.4-104.7-104.8-104.7-104.5-104."1 

-80 63138 62940 62701 62424 62110 61760 61377 60962 60517 60044 59546 59025 58483 57925 57354 56773 56187 55600 55017 

-85.8 -87.1 -88.5 -89.9 -91.2 -92.6 -93.8 -95.0 -96.0 -97.0 -97.8 -98.5 -99.1 -99.5 -99.9-100.1-100.2-100.3-100.3 

-85 60674 60584 60470 60334 60175 59996 59797 59581 59347 59098 58836 58562 58278 57985 57687 57384 57080 56775 56473 

-88.8 -89.3 -89.8 -90.3 -90.8 -91.4 -91.9 -92.4 -92.9 -93.3 -93.8 -94.2 -94.5 -94.9 -95.2 -95.4 -95.7 -95.8 -96.0 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
0. 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 

LAT 

0 32225 32125 31934 31637 31224 30704 30103 29471 28869 28367 28027 27890 27969 28248 28684 29227 29835 30480 31148 

-46.9 -52.7 -59.3 -66.0 -72.2 -77.2 -80.1 -79.8 -75.3 -66.3 -53.7 -39.5 -25.6 -13.5 -3.7 4.2 10.5 14.8 16.6 

-5 30379 30121 29804 29422 28976 28479 27958 27454 27022 26714 26577 26638 26897 27333 27906 28571 29292 30045 30812 

-41.5 -45.1 -49.8 -54.9 -59.7 -63.4 -65.3 -64.1 -59.1 -50.5 -39.6 -28.2 -18.0 -9.8 -3.4 2.0 6.8 10.3 11.5 

-10 29187 28730 28240 27727 27205 26695 26225 25833 25557 25429 25474 25699 26093 26634 27288 28024 28813 29634 30463 

-38.6 -40.6 -43.6 -47.2 -50.5 -52.7 -52.9 -50.3 -44.6 -36.6 -27.6 -19.6 -13.6 -9.7 -6.9 -4.2 -1.2 1.2 1.4 

-15 28652 27969 27275 26595 25960 25401 24952 24642 24491 24511 24698 25040 25517 26105 26784 27532 28331 29161 29990 

-37.6 -38.6 -40.6 -43.0 -44.9 -45.4 -43.8 -39.7 -33.3 -25.9 -19.1 -14.4 -12.3 -12.3 -12.9 -12.9 -12.1 -11.4 -12.5 

-20 28718 27802 26889 26024 25251 24616 24153 23886 23818 23938 24219 24630 25142 25732 26387 27095 27844 28614 29371 

-38.1 -38.9 -40.4 -42.0 -42.7 -41.7 -38.4 -33.0 -26.1 -19.3 -14.3 -12.2 -13.1 -16.1 -19.6 -22.3 -24.0 -25.6 -28.7 

-25 29300 28157 27032 25982 25063 24331 23823 23556 23522 23689 24013 24448 24957 25516 26112 26739 27389 28041 28665 

-40.2 -41.4 -42.9 -44.0 -43.7 -41.5 -36.9 -30.3 -23.0 -16.6 -12.8 -12.3 -15.2 -20.2 -25.9 -31.2 -35.7 -40.0 -45.3 

-30 30317 28969 27655 26438 25382 24545 23967 23659 23605 23762 24076 24492 24964 25465 25979 26500 27020 27523 27982 

-44.6 -46.5 -48.1 -48.8 -47.8 -44.6 -39.0 -31.7 -24.1 -17.9 -14.5 -14.7 -18.4 -24.5 -31.8 -39.3 -46.5 -53.6 -61.3 

-35 31719 30203 28739 27388 26217 25281 24616 24231 24107 24199 24449 24799 25199 25616 26031 26434 26817 27169 27474 

-40 

-51.5 -54.0 -55.8 -56.2 -54.6 -50.6 -44.4 -36.8 -29.1 -22.9 -19.6 -19.8 -23.5 -30.0 -38.3 -47.5 -56.9 -66.3 -75.9 

33502 31870 30304 28865 27609 26587 25830 25344 25109 25086 25220 25456 25745 26052 26354 26638 26897 27125 27319 

-60.9 -63.7 -65.4 -65.4 -63.3 -58.9 -52.6 -45.0 -37.6 -31.5 -28.2 -28.2 -31.6 -38.0 -46.7 -56.7 -67.5 -78.4 -89.0 

-45 35681 33995 32387 30907 29605 28519 27675 27076 26707 26534 26513 26596 26742 26916 27095 27267 27425 27570 27707 

-71.9 -74.5 -75.7 -75.2 -72.8 -68.3 -62.3 -55.4 -48.6 -43.2 -40.1 -40.0 -43.1 -49.1 -57.5 -67.7 -78.7 -89.8-100.4 

-50 38257 36586 34994 33524 32214 31093 30179 29475 28969 28636 28444 28357 28343 28373 28430 28501 28583 28682 28808 

-83.3 -85.1 -85.6 -84.6 -82.0 -77.8 -72.4 -66.5 -61.0 -56.6 -54.2 -54.3 -57.1 -62.6 -70.3 -79.6 -89.8-100.0-109.4 

-55 41179 39586 38067 36654 35376 34253 33298 32513 31892 31417 31069 30823 30658 30553 30498 30484 30511 30586 30721 

-93.5 -94.3 -94.0 -92.6 -89.9 -86.2 -81.9 -77.3 -73.2 -70.1 -68.5 -69.0 -71.7 -76.4 -83.0 -90.9 -99.4-107.9-115.4 

-60 44319 42860 41463 40151 38944 37857 36900 36076 35381 34806 34342 33974 33689 33479 33335 33255 33241 33300 33442 

-101.1-101.0-100.1 -98.5 -96.1 -93.1 -89.8 -86.6 -83.9 -82.0 -81.3 -82.1 -84.5 -88.4 -93.6 -99.6-106.1-112.5-118.1 

-65 47482 46201 44967 43795 42700 41693 40782 39969 39256 38639 38115 37679 37325 37050 36851 36729 36686 36730 36866 

-105.4-104.7-103.6-102.0-100.1 -97.9 -95.7 -93.7 -92.1 -91.2 -91.2 -92.1 -94.1 -97.0-100.6-104.9-109.3-113.6-117.4 

-70 50443 49374 48336 47341 46399 45517 44702 43959 43290 42696 42178 41735 41368 41076 40860 40723 40667 40696 40816 

-106.2-105.4-104.4-103.2-101.9-100.6 -99.3 -98.2 -97.5 -97.2 -97.4 -98.3 -99.6-101.6-103.9-106.5-109.2-111.8-114.0 

-75 52998 52165 51353 50567 49816 49105 48439 47823 47259 46752 46304 45916 45591 45330 45137 45012 44959 44980 45078 

-104.1-103.6-103.0-102.4-101.7-101.0-100.5-100.1 -99.9 -99.9-100.1-100.7-101.5-102.6-103.8-105.1-106.5-107.8-108.9 

-80 55017 54441 53879 53332 52807 52307 51835 51396 50992 50626 50301 50019 49783 49594 49454 49366 49331 49349 49423 

-100.3-100.2-100.0 -99.9 -99.7 -99.6 -99.5 -99.4 -99.5 -99.6 -99.8-100.0-100.4-100.8-101.3-101.7-102.2-102.7-103.0 

-85 56473 56175 55884 55602 55330 55072 54828 54601 54393 54204 54038 53894 53775 53681 53613 53573 53560 53576 53619 

-96.0 -96.2 -96.3 -96.4 -96.5 -96.6 -96.7 -96.7 -96.8 -96.9 -97.0 -97.1 -97.1 -97.2 -97.3 -97.3 -97.4 -97.4 -97.4 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 

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z 

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180°W 150°W 120°W 90°W 60°W 30°W 00 30°E 60°E 90°E 120°E 150°E 180°E 
w 

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GRID VALUES OF TOTAL MAGNETIC 

INTENSITY (F) (2°X2°) 
co 

0 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

78 

76 

74 

IGRF 1980 TOTAL INTENSITY (F) 

0 4 6 8 10 1 2 14 16 18 20 22 24 26 28 30 32 34 36 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

56361 56366 56371 56377 56383 56390 56398 56406 56415 56424 56434 56444 56455 56466 56478 56490 56503 56516 56529 

8.2 8.2 8.2 8.2 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.2 8.2 8.2 8.2 8.1 

55935 55943 55953 55965 55977 55992 56007 56025 56043 56063 56084 56107 56130 56155 56182 56209 56237 56266 56296 

10.8 10.9 10.9 11.0 11.1 11.1 11.2 11.2 11.2 11.3 11.3 11.3 11.3 11.3 11.3 11.2 11.2 11.2 11.1 

55486 55497 55510 55526 55545 55566 55590 55616 55645 55676 55709 55745 55783 55823 55866 55910 55956 56004 56053 

13.2 13.4 13.5 13.7 13.8 13.9 14.0 14.1 14.2 14.3 14.3 14.4 14.4 14.4 14.4 14.4 14.4 14.3 14.3 

55024 55036 55051 55071 55095 55122 55153 55188 •55227 55269 55315 55365 55417 55473 55533 55595 55660 55728 55798 

15.4 15.7 15.9 16.1 16.3 16.5 16.7 16.9 17.0 17.1 17.3 17.4 17.4 17.5 17.5 17.5 17.5 17.5 17.4 

54557 54568 54585 54607 54634 54667 54705 54748 54796 54849 54906 54969 55037 55109 55185 55265 55350 55438 55530 

17.2 17.6 17.9 18.3 18.6 18.9 19.1 19.4 19.6 19.8 20.0 20.2 20.3 20.4 20.5 20.6 20.6 20.6 20.6 

54092 54101 54118 54141 54171 54207 54251 54300 54357 54419 54488 54563 54644 54732 54824 54923 55026 55135 55249 

18.7 19.1 19.6 20.0 20.5 20.9 21.2 21.6 21.9 22.2 22.5 22.8 23.0 23.1 23.3 23.4 23.5 23.5 23.5 

53633 53640 53655 53678 53709 53748 53796 53851 53914 53985 54064 54151 54244 54345 54454 54569 54690 54818 54952 

19.7 20.3 20.8 21.4 21.9 22.5 23.0 23.4 23.9 24.3 24.6 25.0 25.3 25.5 25.7 25.9 26.0 26.1 26.1 

53183 53186 53199 53221 53253 53294 53344 53404 53473 53551 53638 53734 53839 53953 54075 54205 54343 54489 54642 

20.2 20.9 21.6 22.3 23.0 23.6 24.2 24.8 25.4 25.9 26.3 26.8 27.1 27.5 27.8 28.0 28.2 28.3 28.3 

72 52742 52741 52751 52772 52803 52845 52898 52961 53034 53118 53213 53317 53432 53556 53690 53833 53986 54147 54317 

20.3 21.1 22.0 22.8 23.6 24.4 25.1 25.8 26.4 27.0 27.6 28.1 28.6 29.0 29.3 29.6 29.9 30.0 30.1 

70 52308 52304 52311 52330 52361 52403 52458 52523 52601 52689 52789 52901 53023 53157 53301 53455 53620 53795 53980 

20.0 21.0 21.9 22.9 23.8 24.6 25.5 26.3 27.1 27.8 28.4 29.0 29.6 30.0 30.5 30.8 31.1 31.3 31.4 

68 51880 51872 51877 51895 51925 51968 52023 52091 52172 52264 52369 52486 52615 52756 52909 53073 53248 53434 53631 

19.4 20.4 21.5 22.6 23.6 24.6 25.5 26.4 27.3 28.1 28.8 29.5 30.1 30.6 31.1 31.5 31.8 32.0 32.2 

66 51453 51442 51446 51462 51493 51536 51593 51663 51747 51843 51952 52074 52208 52355 52514 52686 52869 53065 53272 

18.5 19.6 20.8 22.0 23.1 24.2 25.2 26.2 27.1 28.0 28.8 29.6 30.2 30.8 31.3 31.8 32.1 32.3 32.5 

64 51022 51010 51013 51030 51061 51106 51165 51237 51324 51423 51536 51662 51801 51953 52118 52295 52485 52687 52902 

17.4 18.7 19.9 21.2 22.4 23.5 24.7 25.7 26.7 27.7 28.6 29.3 30.1 30.7 31.2 31.6 32.0 32.2 32.3 

62 50581 50570 50574 50592 50625 50673 50734 50810 50900 51003 51119 51249 51392 51548 51718 51900 52095 52302 52522 

16.2 17.6 18.9 20.2 21.5 22.8 24.0 25.1 26.1 27.1 28.0 28.9 29.6 30.2 30.8 31.2 31.5 31.7 31.9 

60 50127 50118 50124 50145 50182 50233 50298 50378 50471 50578 50699 50833 50980 51140 51313 51498 51697 51908 52132 

15.0 16.5 17.9 19.3 20.6 21.9 23.2 24.3 25.5 26.5 27.4 28.3 29.0 29.6 30.2 30.6 30.9 31.0 31.1 
co 

_, 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

IGRF 1980 TOTAL INTENSITY (F) 

36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

56529 56543 56557 56571 56586 56601 56616 56631 56646 56662 56678 56694 56709 56725 56741 56757 56773 56788 56804 

8.1 8.1 8.1 8.0 8.0 7.9 7.9 7.8 7.7 7.7 7.6 7.5 7.5 7.4 7.3 7.2 7.1 7.1 7.0 

56296 56327 56359 56392 56425 56459 56493 56528 56563 56599 56634 56670 56706 56742 56777 56813 56848 56883 56918 

11.1 11.1 11.0 10.9 10.8 10.7 10.6 10.5 10.4 10.2 10.1 10.0 9.8 9.6 9.5 9.3 9.1 8.9 8.7 

56053 56104 56157 56211 56266 56322 56379 56436 56495 56554 56613 56672 56732 56791 56851 56909 56968 57025 57082 

14.3 14.2 14.1 14.0 13.9 13.7 13.6 13.4 13.2 13.0 12.8 12.6 12.4 12.1 11.9 11.6 11.3 11.0 10.7 

55798 55871 55946 56024 56103 56183 56265 56349 56433 56518 56604 56690 56776 56862 56947 57032 57116 57199 57281 

17.4 17.4 17.3 17.1 17.0 16.8 16.6 16.4 16.2 15.9 15.7 15.4 15.0 14.7 14.4 14.0 13.6 13.2 12.8 

55530 55626 55725 55826 55930 56037 56146 56257 56369 56482 56596 56711 56826 56940 57054 57168 57280 57391 57499 

20.6 20.5 20.4 20.3 20.1 19.9 19.7 19.4 19.2 18.8 18.5 18.1 17.7 17.3 16.9 16.4 15.9 15.4 14.8 

78 55249 55367 55489 55615 55745 55878 56014 56153 56294 56436 56580 56724 56869 57014 57159 57302 57444 57584 57722 

23.5 23.4 23.3 23.2 23.1 22.8 22.6 22.3 22.0 21.6 21.2 20.8 20.3 19.8 19.3 18.7 18.1 17.5 16.8 

76 54952 55092 55237 55388 55543 55702 55865 56031 56201 56372 56546 56721 56896 57072 57248 57422 57594 57765 57932 

26.1 26.1 26.0 25.9 25.7 25.5 25.2 24.9 24.6 24.2 23.7 23.2 22.7 22.1 21.5 20.8 20.1 19.4 18.6 

74 54642 54802 54968 55141 55320 55504 55693 55887 56084 56284 56487 56692 56898 57104 57310 57515 57719 57920 58117 

28.3 28.3 28.3 28.2 28.0 27.8 27.5 27.2 26.8 26.3 25.8 25.3 24.7 24.0 23.3 22.6 21.8 21.0 20.1 

72 54317 54496 54682 54876 55076 55283 55497 55715 55938 56166 56396 56630 56865 57101 57337 57573 57806 58037 58265 

30.1 30.1 30.1 30.0 29.8 29.6 29.3 28.9 28.5 28.0 27.5 26.9 26.2 25.5 24.7 23.9 23.1 22.2 21.2 

70 53980 54174 54378 54590 54810 55038 55273 55514 55761 56014 56270 56530 56793 57057 57321 57585 57848 58108 58364 

31.4 31.5 31.4 31.3 31.1 30.9 30.6 30.2 29.7 29.2 28.6 28.0 27.2 26.5 25.7 24.8 23.9 22.9 21.9 

68 53631 53839 54057 54284 54521 54767 55021 55282 55551 55825 56105 56389 56676 56966 57257 57548 57837 58124 58407 

32.2 32.2 32.2 32.1 31.9 31.7 31.3 30.9 30.4 29.8 29.2 28.5 27.7 26.9 26.0 25.1 24.2 23.2 22.1 

66 53272 53490 53720 53960 54211 54471 54741 55019 55305 55599 55899 56204 56513 56826 57140 57455 57769 58081 58389 

32.5 32.5 32.5 32.4 32.2 31.9 31.5 31.0 30.5 29.9 29.2 28.4 27.6 26.8 25.9 24.9 23.9 22.9 21.8 

64 52902 53129 53367 53618 53879 54151 54433 54725 55026 55335 55652 55975 56303 56635 56969 57305 57640 57974 58304 

32.3 32.4 32.3 32.2 31.9 31.6 31.2 30.6 30.0 29.4 28.7 27.9 27.0 26.1 25.1 24.2 23.1 22.1 21.0 

62 52522 52755 53000 53257 53527 53807 54099 54401 54713 55035 55364 55701 56044 56392 56743 57096 57450 57802 58150 

31.9 31.9 31.8 31.6 31.2 30.8 30.4 29.8 29.1 28.4 27.6 26.8 25.9 24.9 23.9 22.9 21.9 20.8 19.7 

60 52132 52369 52618 52880 53154 53440 53738 54048 54367 54697 55036 55384 55738 56098 56462 56829 57196 57563 57927 

31.1 31.0 30.9 30.6 30.2 29.8 29.2 28.5 27.8 27.0 26.2 25.3 24.3 23.3 22.3 21.2 20.2 19.1 18.0 
00 

to.) 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

78 

76 

74 

IGRF 1980 TOTAL INTENSITY (F) 

72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

56804 56819 56835 56850 56865 56879 56894 56908 56922 56935 56948 56961 56974 56986 56997 57009 57019 57030 57040 

7.0 6.9 6.8 6.7 6.6 6.5 6.4 6.3 6.2 6.1 6.0 5.9 5.7 5.6 5.5 5.4 5.3 5.2 5.1 

56918 56952 56986 57019 57051 57082 57113 57143 57172 57200 57227 57253 57278 57302 57325 57346 57367 57386 57404 

8.7 8.5 8.3 8.1 7.9 7.7 7.5 7.2 7.0 6.8 6.5 6.3 6.1 5.8 5.6 5.4 5.1 4.9 4.7 

57082 57138 57192 57246 57298 57349 57398 57445 57490 57534 57576 57616 57653 57688 57722 57752 57781 57807 57831 

10.7 10.4 10.0 9.7 9.4 9.0 8.7 8.3 7.9 7.6 7.2 6.8 6.4 6.1 5.7 5.3 4.9 4.6 4.2 

57281 57361 57439 57516 57590 57661 57731 57797 57860 57921 57978 58031 58082 58128 58171 58211 58246 58278 58306 

12.8 12.3 11.9 11.4 10.9 10.4 9.9 9.4 8.9 8.4 7.9 7.4 6.8 6.3 5.8 5.3 4.7 4.2 3.7 

57499 57606 57710 57811 57909 58004 58094 58181 58263 58341 58414 58483 58546 58604 58656 58703 58745 58781 58811 

14.8 14.3 13.7 13.1 12.5 11.9 11.2 10.6 9.9 9.3 8.6 7.9 7.2 6.6 5.9 5.2 4.5 3.9 3.2 

57722 57856 57988 58115 58238 58357 58471 58579 58681 58777 58867 58950 59026 59095 59156 59210 59256 59295 59326 

16.8 16.1 15.4 14.7 14.0 13.2 12.4 11.7 10.9 10.0 9.2 8.4 7.6 6.8 5.9 5.1 4.3 3.5 2.7 

57932 58096 58256 58411 58560 58704 58841 58972 59094 59209 59316 59414 59502 59582 59652 59712 59762 59802 59833 

18.6 17.8 17.0 16.2 15.3 14.4 13.5 12.6 11.7 10.7 9.8 8.9 7.9 6.9 6.0 5.1 4.1 3.2 2.3 

58117 58311 58499 58682 58858 59028 59189 59342 59486 59619 59743 59855 59957 60046 60124 60189 60242 60283 60311 

20.1 19.2 18.3 17.4 16.4 15.4 14.4 13.4 12.4 11.3 10.2 9.2 8.1 7.1 6.0 4.9 3.9 2.9 1.9 

72 58265 58487 58704 58915 59118 59313 59498 59674 59838 59990 60131 60258 60371 60470 60555 60625 60679 60719 60743 

21.2 20.3 19.3 18.3 17.2 16.1 15.0 13.9 12.8 11.7 10.5 9.4 8.2 7.1 5.9 4.8 3.7 2.6 1.5 

70 58364 58615 58860 59098 59327 59546 59755 59952 60137 60308 60464 60605 60729 60837 60928 61001 61056 61094 61113 

21.9 20.9 19.8 18.7 17.6 16.5 15.3 14.2 13.0 11.8 10.6 9.4 8.2 7.0 5.8 4.6 3.5 2.3 1.2 

68 58407 58685 58957 59220 59474 59717 59948 60167 60370 60558 60729 60883 61018 61134 61230 61305 61360 61394 61406 

22.1 21.0 19.9 18.8 17.7 16.5 15.3 14.1 12.9 11.7 10.5 9.3 8.1 6.8 5.6 4.4 3.3 2.1 0.9 

66 58389 58691 58987 59274 59551 59816 60068 60306 60527 60731 60916 61081 61226 61348 61448 61525 61578 61607 61612 

21.8 20.7 19.6 18.4 17.3 16.1 14.9 13.7 12.5 11.3 10.1 8.9 7.7 6.6 5.4 4.2 3.0 1.9 0.8 

64 58304 58628 58946 59254 59552 59837 60108 60363 60601 60819 61016 61191 61344 61471 61574 61651 61701 61725 61721 

21.0 19.9 18.8 17.6 16.5 15.3 14.2 13.0 11.9 10.7 9.6 8.4 7.3 6.2 5.1 3.9 2.9 1.8 0.7 

62 58150 58494 58830 59157 59473 59775 60063 60333 60584 60815 61023 61206 61365 61497 61601 61676 61723 61740 61727 

19.7 18.6 17.5 16.4 15.3 14.2 13.1 12.0 10.9 9.9 8.8 7.7 6.7 5.7 4.7 3.7 2.7 1.7 0.7 

60 57927 58286 58638 58980 59311 59628 59929 60212 60475 60715 60932 61122 61285 61419 61524 61597 61639 61648 61625 

18.0 16.9 15.9 14.8 13.8 12.7 11.7 10.7 9.7 8.8 7.8 6.9 6.0 5.1 4.2 3.4 2.5 1.7 0.9 

----------
00 

w 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

IGRF 1980 TOTAL INTENSITY (F) 

108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

57040 57049 57058 57067 57075 57083 57090 57096 57102 57108 57113 57118 57122 57126 57129 57132 57135 57136 57138 

5.1 5.0 4.9 4.8 4.7 4.6 4.5 4.4 4.3 4.2 4.1 4.0 3.9 3.8 3.8 3.7 3.6 3.5 3.5 

57404 57420 57436 57450 57463 57474 57485 57494 57502 57509 57515 57519 57523 57526 57527 57528 57527 57526 57524 

4.7 4.5 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.9 1.7 1.6 1.4 1.3 

57831 57853 57872 57889 57903 57915 57925 57933 57939 57943 57944 57944 57942 57938 57933 57926 57917 57907 57896 

4.2 3.9 3.5 3.1 2.8 2.5 2.1 1.8 1.5 1.2 0.9 0.6 0.4 0.1 -0.1 -0.4 -0.6 -0.8 -1.0 

58306 58330 58351 58367 58380 58)90 58396 58398 58397 58393 58386 58376 58364 58348 58331 58311 58290 58266 58241 

3.7 3.2 2.7 2.2 1.8 1.3 0.8 0.4 o.o -0.4 -0.8 -1.2 -1.5 -1.9 -2.2 -2.5 -2.8 -3.1 -3.3 

58811 58836 58855 58869 58877 58881 58879 58872 58861 58845 58824 58800 58772 58741 58706 58669 58629 58587 58543 

3.2 2.6 1.9 1.3 0.7 0.1 -0.4 -1.0 -1.5 -2.0 -2.5 -3.0 -3.4 -3.9 -4.2 -4.6 -4.9 -5.3 -5.5 

78 59326 59350 59366 59374 59375 59369 59356 59337 59311 59279 59241 59199 59151 59099 59043 58983 58920 58855 58788 

2.7 2.0 1.2 0.4 -0.3 -1.0 -1.7 -2.3 -3.0 -3.6 -4.2 -4.7 -5.2 -5.7 -6.2 -6.6 -7.0 -7.3 -7.6 

76 59833 59853 59863 59864 59855 59837 59810 59774 59731 59679 59620 59555 59484 59407 59325 59239 59149 59057 58962 

2.3 1.4 0.5 -0.4 -1.2 -2.0 -2.8 -3.6 -4.3 -5.0 -5.7 -6.3 -6.9 -7.4 -7.9 -8.4 -8.8 -9.2 -9.5 

74 60311 60326 60329 60320 60299 60266 60222 60167 60103 60028 59945 59854 59755 59649 59538 59422 59302 59179 59053 

1.9 0.9 -0.1 -1.1 -2.0 -2.9 -3.8 -4.6 -5.4 -6.2 -6.9 -7.6 -8.3 -8.9 -9.4 -9.9 -10.4 -10.8 -11.1 

72 60743 60752 60745 60724 60689 60639 60576 60499 60411 60311 60201 60080 59951 59814 59671 59522 59368 59211 59052 

1.5 0.4 -0.6 -1.7 -2.7 -3.7 -4.6 -5.5 -6.4 -7.2 -8.0 -8.7 -9.4 -10.0 -10.6 -11.1 -11.6 -12.0 -12.4 

70 61113 61113 61096 61062 61010 60941 60857 60757 60642 60515 60374 60223 60061 59890 59712 59528 59338 59145 58950 

1.2 o.o -1.0 -2.1 -3.2 -4.2 -5.2 -6.1 -7.0 -7.9 -8.7 -9.4 -10.1 -10.8 -11.4 -11.9 -12.4 -12.9 -13.2 

68 61406 61398 61369 61319 61249 61160 61052 60927 60785 60628 60456 60271 60075 59869 59654 59433 59206 58976 58744 

0.9 -0.2 -1.3 -2.4 -3.4 -4.5 -5.5 -6.4 -7.3 -8.2 -9.0 -9.8 -10.5 -11.2 -11.8 -12.4 -12.8 -13.3 -13.6 

66 61612 61593 61551 61485 61396 61285 61153 61001 60831 60642 60438 60219 59987 59745 59493 59233 58968 58700 58430 

0.8 -0.3 -1.4 -2.5 -3.5 -4.5 -5.5 -6.4 -7.3 -8.2 -9.0 -9.8 -10.5 -11.2 -11.8 -12.3 -12.8 -13.2 -13.6 

64 61721 61691 61634 61551 61442 61309 61152 60973 60772 60552 60315 60061 59794 59514 59224 58927 58624 58317 58010 

0.7 -0.3 -1.4 -2.4 -3.3 -4.3 -5.2 -6.1 -7.0 -7.8 -8.6 -9.3 -10.0 -10.7 -11.3 -11.8 -12.3 -12.7 -13.1 

62 61727 61684 61612 61512 61383 61226 61044 60837 60607 60355 60084 59796 59492 59176 58849 58514 58173 57829 57485 

0.7 -0.2 -1.1 -2.1 -2.9 -3.8 -4.7 -5.5 -6.3 -7.1 -7.8 -8.5 -9.2 -9.8 -10.4 -10.9 -11.3 -11.8 -12.1 

60 61625 61570 61482 61364 61214 61035 60827 60592 60333 60050 59746 59424 59085 58733 58370 57998 57621 57240 56860 

0.9 0.1 -0.7 -1.5 -2.3 -3.1 -3.8 -4.6 -5.3 -6.0 -6.6 -7.3 -7.9 -8.5 -9.0 -9.5 -9.9 -10.3 -10.7 
~ 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

78 

76 

74 

IGRF 1980 TOTAL INTENSITY (F) 

144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 176 178 180 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

57138 57139 57140 57140 57140 57139 57138 57136 57135 57133 57130 57127 57124 57121 57117 57113 57108 57104 57099 

3.5 3.4 3.3 3.3 3.2 3.2 3.1 3.1 3.0 3.0 2.9 2.9 2.9 2.8 2.8 2.8 2.8 2.8 2.8 

57524 57521 57517 57512 57507 57502 57495 57488 57481 57473 57465 57456 57447 57437 57428 57418 57408 57397 57387 

1.3 1.2 1.0 0.9 0.8 0.7 0.6 0.6 0.5 0.4 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 

57896 57884 57871 57857 57842 57827 57811 57794 57777 57760 57742 57725 57707 57690 57672 57655 57638 57622 57605 

-1.0 -1.2 -1.3 -1.5 -1.6 -1.8 -1.9 -2.0 -2.0 -2.1 -2.2 -2.2 -2.3 -2.3 -2.3 -2.3 -2.3 -2.2 -2.2 

58241 58215 58187 58159 58130 58100 58070 58040 58010 57980 57951 57922 57893 57866 57839 57814 57789 57766 57744 

-3.3 -3.5 -3.7 -3.9 -4.1 -4.2 -4.3 -4.4 -4.5 -4.6 -4.6 -4.6 -4.6 -4.6 -4.6 -4.5 -4.5 -4.4 -4.3 

58543 58498 58451 58404 58356 58308 58261 58213 58167 58121 58077 58034 57993 57954 57917 57882 57850 57820 57793 

-5.5 -5.8 -6.0 -6.2 -6.4 -6.5 -6.6 -6.7 -6.8 -6.8 -6.8 -6.8 -6.8 -6.7 -6.6 -6.5 -6.4 -6.3 -6.1 

58788 58719 58649 58579 58509 58438 58369 58301 58235 58171 58110 58051 57996 57944 57896 57852 57812 57776 57745 

-7.6 -7.9 -8.2 -8.4 -8.5 -8.7 -8.8 -8.8 -8.9 -8.8 -8.8 -8.7 -8.6 -8.5 -8.4 -8.2 -8.0 -7.8 -7.5 

58962 58866 58769 58672 58575 58480 58386 58295 58207 58122 58042 57966 57895 57830 57770 57716 57669 57628 57593 

-9.5 -9.8 -10.1 -10.3 -10.4 -10.5 -10.6 -10.6 -10.6 -10.6 -10.5 -10.4 -10.2 -10.0 -9.8 -9.5 -9.2 -8.9 -8.6 

59053 58926 58799 58672 58546 58423 58303 58186 58074 57967 57867 57772 57685 57606 57534 57471 57417 57371 57335 

-11.1 -11.4 -11.7 -11.9 -12.0 -12.1 -12.1 -12.1 -12.1 -12.0 -11.8 -11.6 -11.4 -11.1 -10.8 -10.5 -10.1 -9.7 -9.3 

72 59052 58891 58731 58572 58415 58262 58113 57969 57832 57702 57580 57466 57363 57269 57186 57114 57053 57004 56967 

-12.4 -12.7 -12.9 -13.1 -13.2 -13.3 -13.3 -13.3 -13.2 -13.0 -12.8 -12.5 -12.2 -11.9 -11.5 -11.1 -10.6 -10.1 -9.6 

70 58950 58755 58559 58366 58177 57992 57813 57641 57478 57324 57180 57048 56927 56820 56725 56645 56579 56527 56490 

-13.2 -13.5 -13.8 -13.9 -14.0 -14.1 -14.1 -14.0 -13.9 -13.6 -13.4 -13.1 -12.7 -12.3 -11.8 -11.3 -10.8 -10.3 -9.7 

68 58744 58512 58281 58053 57830 57613 57403 57203 57013 56835 56670 56518 56381 56260 56155 56067 55996 55943 55908 

-13.6 -13.9 -14.2 -14.3 -14.4 -14.5 -14.4 -14.3 -14.2 -13.9 -13.6 -13.3 -12.9 -12.4 -11.9 -11.3 -10.7 -10.1 -9.4 

66 58430 58161 57894 57630 57373 57124 56884 56656 56440 56238 56051 55881 55729 55595 55480 55385 55311 55257 55224 

-13.6 -13.9 -14.1 -14.3 -14.4 -14.4 -14.4 -14.3 -14.1 -13.8 -13.5 -13.1 -12.7 -12.2 -11.6 -11.0 -10.4 -9.7 -9.0 

64 58010 57703 57400 57102 56812 56531 56261 56005 55763 55539 55332 55144 54976 54830 54707 54606 54528 54475 54445 

-13.1 -13.4 -13.6 -13.8 -13.9 -13.9 -13.9 -13.8 -13.6 -13.4 -13.0 -12.7 -12.2 -11.7 -11.2 -10.6 -9.9 -9.2 -8.5 

62 57485 57142 56804 56472 56149 55838 55539 55257 54991 54744 54518 54314 54133 53976 53844 53738 53658 53606 53580 

-12.1 -12.4 -12.7 -12.9 -13.0 -13.0 -13.0 -12.9 -12.8 -12.6 -12.3 -11.9 -11.5 -11.0 -10.5 -9.9 -9.3 -8.6 -7.8 

60 56860 56483 56111 55747 55393 55052 54727 54419 54131 53864 53620 53401 53207 53040 52901 52791 52710 52659 52637 

-10.7 -11.0 -11.3 -11.5 -11.6 -11.7 -11.8 -11.7 -11.6 -11.5 -11.2 -11.0 -10.6 -10.2 -9.7 -9.1 -8.5 -7.9 -7.2 

- --------·------
co 

0'1 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 180 -178 -176 -174 -172 -170 -168 -166 -164 -162 -160 -158 -156 -154 -152 -150 -148 -146 -144 

LAT 

90 

88 

86 

84 

82 

80 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

57099 57093 57088 57082 57076 57070 57063 57056 57049 57042 57035 57027 57019 57011 57003 56994 56986 56977 56968 

2.8 2.7 2.7 2.7 2.7 2.8 2.8 2.8 2.8 2.8 2.8 2.9 2.9 2.9 2.9 3.0 3.0 3.1 3.1 

57387 57376 57365 57354 57343 57332 57320 57309 57297 57285 57274 57262 57250 57237 57225 57212 57200 57187 57174 

0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.4 0.4 0.5 0.5 0.6 0.7 0.7 0.8 0.9 1.0 1.1 1.2 

57605 57589 57574 57558 57544 57529 57515 57502 57488 57476 57463 57451 57439 57427 57415 57404 57392 57380 57369 

-2.2 -2.2 -2.1 -2.0 -2.0 -1.9 -1.8 -1.7 -1.6 -1.5 -1.4 -1.3 -1.1 -1.0 -0.9 -0.7 -0.6 -0.4 -0.3 

57744 57723 57704 57686 57669 57654 57640 57628 57616 57606 57597 57589 57581 57575 57569 57564 57559 57554 57549 

-4.3 -4.2 -4.1 -4.0 -3.8 -3.7 -3.5 -3.4 -3.2 -3.0 -2.9 -2.7 -2.5 -2.3 -2.1 -1.9 -1.7 -1.5 -1.3 

57793 57769 57747 57728 57712 57699 57688 57679 57674 57670 57668 57669 57671 57675 57681 57687 57695 57703 57711 

-6.1 -5.9 -5.7 -5.5 -5.3 -5.1 -4.9 -4.6 -4.4 -4.2 -3.9 -3.7 -3.4 -3.2 -2.9 -2.7 -2.4 -2.2 -1.9 

78 57745 57718 57696 57678 57665 57656 57651 57651 57654 57661 57672 57686 57703 57722 57744 57768 57793 57820 57847 

-7.5 -7.3 -7.0 -6.7 -6.4 -6.1 -5.8 -5.5 -5.2 -4.8 -4.5 -4.2 -3.9 -3.6 -3.3 -3.0 -2.7 -2.4 -2.1 

76 57593 57566 57544 57530 57522 57520 57525 57536 57552 57574 57601 57633 57669 57709 57752 57799 57847 57897 57949 

-8.6 -8.2 -7.9 -7.5 -7.1 -6.7 -6.3 -5.9 -5.5 -5.1 -4.7 -4.4 -4.0 -3.6 -3.3 -3.0 -2.6 -2.3 -2.1 

74 57335 57307 57289 57280 57280 57288 57305 57331 57364 57404 57451 57505 57565 57629 57698 57771 57848 57926 58007 

-9.3 -8.8 -8.4 -7.9 -7.4 -7.0 -6.5 -6.0 -5.5 -5.1 -4.6 -4.2 -3.8 -3.4 -3.0 -2.6 -2.3 -2.0 -1.7 

72 56967 56941 56928 56926 56936 56957 56989 57032 57084 57146 57217 57296 57383 57476 57575 57679 57786 57897 58010 

-9.6 -9.1 -8.5 -8.0 -7.4 -6.9 -6.3 -5.8 -5.2 -4.7 -4.2 -3.7 -3.3 -2.9 -2.5 -2.1 -1.8 -1.5 -1.3 

70 56490 56468 56461 56468 56490 56526 56575 56637 56712 56798 56895 57003 57119 57243 57375 57512 57655 57801 57949 

-9.7 -9.0 -8.4 -7.8 -7.2 -6.5 -5.9 -5.3 -4.7 -4.1 -3.6 -3.1 -2.6 -2.2 -1.8 -1.5 -1.2 -0.9 -0.7 

68 55908 55890 55891 55908 55943 55995 56063 56147 56246 56358 56483 56620 56768 56926 57092 57265 57444 57627 57814 

-9.4 -8.8 -8.1 -7.4 -6.7 -6.0 -5.3 -4.6 -4.0 -3.4 -2.8 -2.3 -1.9 -1.5 -1.1 -0.8 -0.6 -0.4 -0.3 

66 55224 55212 55221 55250 55299 55369 55456 55563 55686 55825 55980 56148 56328 56520 56722 56931 57148 57369 57595 

-9.0 -8.3 -7.6 -6.8 -6.1 -5.3 -4.6 -3.9 -3.2 -2.6 -2.1 -1.5 -1.1 -0.7 -0.4 -0.2 o.o 0.1 0.1 

64 54445 54439 54457 54499 54563 54650 54758 54887 55035 55201 55385 55584 55798 56024 56261 56507 56761 57020 57284 

-8.5 -7.7 -6.9 -6.2 -5.4 -4.6 -3.9 -3.2 -2.5 -1.9 -1.3 -0.8 -0.4 o.o 0.2 0.4 0.4 0.4 0.3 

62 53580 53580 53608 53661 53741 53845 53973 54124 54297 54490 54702 54931 55177 55436 55707 55989 56279 56576 56877 

-7.8 -7.1 -6.3 -5.5 -4.7 -3.9 -3.2 -2.5 -1.8 -1.2 -0.6 -0.2 0.2 0.5 0.7 0.7 0.7 0.6 0.3 

60 52637 52644 52681 52746 52840 52961 53108 53280 53477 53695 53934 54192 54468 54758 55062 55378 55702 56034 56371 

-7.2 -6.5 -5.7 -4.9 -4.1 -3.4 -2.6 -1.9 -1.2 -0.7 -0.1 0.3 0.6 0.8 0.9 0.9 0.8 0.5 0.1 
00 

oIGRF 1980 TOTAL INTENSITY (F) 

LONG -144 -142 -140 -138 -136 -134 -132 -130 -128 -126 -124 -122 -120 -118 -116 -114 -112 -110 -108 

LAT 

90 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

88 56968 56958 56949 56939 56929 56919 56909 56899 56888 56878 56867 56856 56845 56833 56822 56810 56798 56787 56775 

3.1 3.1 3.2 3.2 3.3 3.3 3.4 3.5 3.5 3.6 3.6 3.7 3.8 3.8 3.9 4.0 4.1 4.1 4.2 

86 57174 57160 57146 57132 57118 57104 57089 57073 57058 57041 57025 57008 56990 56973 56954 56935 56916 56896 56876 

1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.4 2.5 2.6 2.7 2.9 3.0 3.1 3.2 

84 57369 57357 57344 57332 57319 57305 57291 57277 57262 57246 57229 57211 57193 57173 57152 57131 57108 57084 57059 

-0.3 -0.2 o.o 0.1 0.3 0.4 0.6 0.8 0.9 1.1 1.2 1.4 1.5 1.7 1.9 2.0 2.2 2.4 2.5 

82 57549 57545 57540 57535 57529 57523 57516 57508 57499 57489 57477 57464 57449 57433 57414 57394 57372 57348 57322 

-1.3 -1.1 -0.9 -0.7 -0.6 -0.4 -0.2 o.o 0.2 0.4 0.6 0.7 0.9 1.1 1.3 1.5 1.6 1.8 2.0 

80 57711 57720 57729 57737 57745 57751 57757 57761 57764 57765 57764 57760 57754 57745 57734 57719 57702 57681 57657 

-1.9 -1.7 -1.5 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 o.o 0.2 0.4 0.5 0.7 0.9 1.1 1.2 1.4 1.5 

78 57847 57875 57903 57930 57957 57982 58006 58028 58048 58065 58079 58090 58097 58101 58100 58095 58086 58072 58053 

-2.1 -1.9 -1.6 -1.4 -1.2 -1.0 -0.7 -0.5 -0.4 -0.2 0.0 0.1 0.3 0.4 0.6 0.7 0.9 1.0 - 1.1 

76 57949 58001 58053 58105 58156 58205 58253 58297 58339 58377 58411 58441 58466 58485 58499 58507 58509 58505 58494 

-2.1 -1.8 -1.5 -1.3 -1.1 -0.9 -0.7 -0.5 -0.4 -0.3 -0.1 o.o 0.1 0.2 0.3 0.3 0.4 0.5 0.5 

74 58007 58088 58169 58250 58330 58408 58483 58555 58623 58686 58744 58796 58842 58881 58913 58938 58954 58962 58961 

-1.7 -1.5 -1.2 -1.0 -0.9 -0.7 -0.6 -0.5 -0.4 -0.3 -0.3 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 

72 58010 58125 58239 58353 58466 58576 58682 58785 58882 58974 59060 59138 59208 59270 59322 59366 59399 59422 59435 

-1.3 -1.1 -0.9 -0.7 -0.6 -0.5 -0.5 -0.5 -0.5 -0.5 -0,.5 -0.6 -0.7 -0.8 -0.9 -1.0 -1.1 -1.2 -1.3 

70 57949 58100 58250 58400 58548 58694 58835 58971 59101 59224 59339 59446 59543 59630 59706 59771 59823 59864 59891 

-0.7 -0.6 -0.5 -0.4 -0.4 -0.4 -0.5 -0.6 -0.7 -0.9 -1.1 -1.2 -1.5 -1.7 -1.9 -2.1 -2.4 -2.6 -2.9 

68 57814 58002 58191 58379 58565 58747 58924 59096 59260 59417 59564 59701 59827 59941 60043 60131 60205 60264 60309 

-0.3 -0.2 -0.2 -0.3 -0.4 -0.5 -0.7 -1.0 -1.2 -1.5 -1.9 -2.2 -2.6 -3.0 -3.3 -3.7 -4.1 -4.5 -4.9 

66 57595 57822 58050 58277 58501 58721 58936 59144 59344 59535 59716 59885 60041 60184 60312 60425 60522 60603 60666 

0.1 0.1 -0.1 -0.3 -0.5 -0.8 -1.2 -1.6 -2.1 -2.5 -3.0 -3.6 -4.1 -4.7 -5.2 -5.8 -6.3 -6.9 -7.4 

64 57284 57550 57817 58083 58346 58604 58857 59102 59338 59564 59778 59980 60167 60339 60495 60635 60756 60859 60943 

0.3 0.1 -0.1 -0.5 -0.9 -1.4 -2.0 -2.6 -3.2 -3.9 -4.6 -5.4 -6.1 -6.8 -7.6 -8.3 -9.1 -9.8 -10.5 

62 56877 57181 57486 57790 58091 58387 58676 58958 59229 59490 59738 59972 60190 60393 60577 60744 60891 61017 61123 

0.3 o.o -0.5 -1.0 -1.6 -2.3 -3.1 -3.9 -4.8 -5.7 -6.6 -7.6 -8.5 -9.5 -10.4 -11.4 -12.3 -13.2 -14.1 

60 56371 56711 57052 57392 57729 58061 58386 58702 59008 59303 59584 59850 60099 60332 60545 60739 60912 61063 61192 

0.1 -0.4 -1.0 -1.8 -2.6 -3.5 -4.5 -5.6 -6.7 -7.8 -9.0 -10.2 -11.4 -12.5 -13.7 -14.9 -16.0 -17.1 -18.2 
00 

" 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

IGRF 1980 TOTAL INTENSITY (F) 

-108 -106 -104 -102 -100 -98 -96 -94 -92 -90 -88 -86 -84 -82 -80 -78 -76 -74 -72 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

56775 56763 56750 56738 56726 56713 56701 56688 56676 56663 56651 56638 56626 56613 56601 56588 56576 56564 56552 

4.2 4.3 4.4 4.4 4.5 4.6 4.7 4.8 4.8 4.9 5.0 5.1 5.2 5.3 5.3 5.4 5.5 5.6 5.7 

56876 56855 56834 56812 56790 56767 56744 56721 56697 56672 56648 56623 56598 56572 56547 56521 56495 56469 56443 

3.2 3.4 3.5 3.6 3.8 3.9 4.0 4.2 4.3 4.5 4.6 4.7 4.9 5.0 5.2 5.3 5.5 5.6 5.8 

57059 57033 57006 56977 56947 56917 56885 56851 56817 56782 56746 56708 56670 56631 56591 56551 56510 56468 56426 

2.5 2.7 2.8 3.0 3.2 3.3 3.5 3.7 3.9 4.0 4.2 4.4 4.6 4.7 4.9 5.1 5.3 5.5 5.7 

57322 57293 57263 57230 57195 57158 57119 57077 57034 56988 56940 56891 56839 56786 56731 56675 56618 56559 56499 

2.0 2.2 2.3 2.5 2.7 2.8 3.0 3.2 3.4 3.6 3.8 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.4 

57657 57629 57598 57564 57525 57484 57439 57390 57338 57282 57224 57162 57097 57029 56959 56885 56810 56732 56653 

1.5 1.7 1.9 2.0 2.2 2.3 2.5 2.7 2.8 3.0 3.2 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 

78 58053 58029 58000 57965 57926 57882 57832 57777 57717 57653 57583 57509 57430 57348 57261 57170 57076 56978 56878 

1.1 1.2 1.3 1.5 1.6 1.7 1.8 2.0 2.1 2.2 2.4 2.5 2.7 2.8 3.0 3.2 3.4 3.6 3.8 

76 58494 58476 58451 58420 58381 58335 58282 58223 58156 58083 58003 57917 57824 57726 57623 57514 57400 57282 57159 

0.5 0.6 0.7 0.7 0.8 0.9 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.8 1.9 2.1 2.3 2.4 

74 58961 58952 58934 58907 58871 58825 58771 58707 58635 58554 58464 58366 58260 58147 58026 57899 57765 57626 57481 

-0.2 -0.2 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.2 -0.2 -0.1 -0.1 o.o 0.1 0.2 0.3 0.5 0.6 

72 59435 59436 59427 59406 59374 59330 59276 59210 59133 59045 58946 58837 58719 58590 58453 58307 58153 57992 57824 

-1.3 -1.5 -1.6 -1.7 -1.8 -1.9 -1.9 -2.0 -2.1 -2.1 -2.1 -2.1 -2.1 -2.1 -2.1 -2.0 -1.9 -1.8 -1.7 

70 59891 59906 59907 59894 59868 59829 59775 59708 59628 59534 59428 59309 59178 59036 58882 58719 58545 58362 58171 

-2.9 -3.1 -3.3 -3.5 -3.7 -3.9 -4.1 -4.3 -4.4 -4.5 -4.6 -4.7 -4.8 -4.8 -4.8 -4.8 -4.7 -4.6 -4.5 

68 60309 60338 60352 60350 60331 60297 60247 60181 60098 60001 59888 59761 59619 59463 59295 59114 58921 58718 58504 

-4.9 -5.2 -5.6 -5.9 -6.2 -6.5 -6.8 -7.1 -7.3 -7.5 -7.7 -7.8 -8.0 -8.1 -8.1 -8.1 -8.1 -8.1 -8.0 

66 60666 60712 60740 60750 60742 60715 60669 60606 60524 60424 60306 60172 60021 59853 59671 59474 59263 59040 58805 

-7.4 -7.9 -8.4 -8.9 -9.3 -9.7 -10.1 -10.5 -10.8 -11.1 -11.4 -11.6 -11.8 -12.0 -12.1 -12.1 -12.2 -12.2 -12.1 

64 60943 61008 61052 61076 61079 61062 61023 60964 60884 60784 60664 60524 60365 60188 59994 59782 59555 59313 59058 

-10.5 -11.1 -11.8 -12.4 -13.0 -13.5 -14.0 -14.5 -15.0 -15.4 -15.7 -16.0 -16.3 -16.5 -16.7 -16.8 -16.9 -16.9 -16.8 

62 61123 61207 61270 61310 61326 61320 61291 61239 61163 61065 60944 60801 60637 60452 60247 60023 59781 59522 59247 

-14.1 -14.9 -15.7 -16.5 -17.2 -17.9 -18.6 -19.2 -19.7 -20.2 -20.7 -21.1 -21.5 -21.8 -22.0 -22.2 -22.3 -22.3 ~22.2 

60 61192 61297 61379 61437 61469 61477 61459 61415 61346 61252 61133 60990 60822 60631 60418 60183 59928 59654 59362 

-18.2 -19.2 -20.2 -21.1 -22.0 -22.8 -23.6 -24.4 -25.1 -25.7 -26.3 -26.8 -27.2 -27.6 -27.9 -28.1 -28.3 -28.3 -28.3 
(X) 

(X) 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

78 

76 

74 

IGRF 1980 TOTAL INTENSITY (F) 

-72 -70 -68 -66 -64 -62 -60 -58 -56 -54 -52 -50 -48 -46 -4 4 -4 2 -40 -38 -36 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

56552 56540 56528 56517 56506 56495 56484 56473 56463 56453 56443 56434 56425 56417 56408 56401 56393 56387 56380 

5.7 5.8 5.9 5.9 6.0 6.1 6.2 6.3 6.4 6.4 6.5 6.6 6.7 6.8 6.9 6.9 7.0 7.1 7.2 

56443 56417 56391 56365 56339 56314 56289 56264 56239 56215 56192 56169 56147 56125 56105 56085 56066 56048 56030 

5.8 5.9 6.1 6.2 6.4 6.5 6.7 6.8 7.0 7.2 7.3 7.5 7.6 7.8 7.9 8.1 8.2 8.4 8.5 

56426 56384 56341 56298 56255 56212 56169 56127 56085 56043 56002 55962 55923 55884 55847 55811 55776 55742 55710 

5.7 5.9 6.1 6.3 6.5 6.7 6.9 7.1 7.3 7.5 7.7 8.0 8.2 8.4 8.6 8.8 9.1 9.3 9.5 

56499 56438 56376 56314 56251 56188 56124 56061 55998 55936 55874 55813 55753 55694 55637 55581 55527 55474 55424 

5.4 5.6 5.8 6.0 6.3 6.5 6.7 7.0 7.2 7.5 7.8 8.0 8.3 8.6 8.9 9.2 9.5 9.8 10.1 

56653 56572 56489 56405 56320 56234 56148 56062 55975 55889 55804 55719 55635 55553 55473 55394 55318 55244 55172 

4.7 5.0 5.2 5.4 5.7 5.9 6.2 6.5 6.8 7.1 7.4 7.7 8.0 8.3 8.7 9.0 9.4 9.8 10.1 

56878 56775 56669 56562 56453 56342 56231 56119 56007 55895 55784 55673 55564 55456 55350 55247 55146 55048 54954 

3.8 4.0 4.2 4.5 4.7 5.0 5.3 5.6 5.9 6.2 6.5 6.9 7.3 7.6 8.0 8.4 8.8 9.3 9.7 

57159 57033 56904 56771 56637 56500 56362 56223 56084 55944 55805 55667 55530 55395 55262 55132 55005 54882 54763 

2.4 2.6 2.9 3.1 3.4 3.6 3.9 4.2 4.5 4.9 5.2 5.6 6.0 6.4 6.9 7.3 7.8 8.3 8.8 

57481 57331 57176 57018 56857 56693 56527 56360 56192 56023 55855 55688 55522 55359 55198 55041 54887 54737 54592 

0.6 0.8 1.0 1.3 1.5 1.8 2.1 2.4 2.7 3.1 3.5 3.9 4.3 4.8 5.2 5.8 6.3 6.8 7.4 

72 57824 57650 57470 57286 57097 56905 56711 56514 56317 56119 55921 55724 55529 55336 55147 54961 54780 54603 54432 

-1.7 -1.5 -1.3 -1.1 -0.9 -0.6 -0.3 0.0 0.4 0.8 1.2 1.6 2.1 2.6 3.2 3.7 4.3 4.9 5.6 

70 58171 57973 57768 57557 57341 57120 56897 56671 56443 56215 55988 55761 55536 55314 55096 54882 54673 54469 54272 

-4.5 -4.4 -4.2 -4.0 -3.8 -3.5 -3.2 -2.8 -2.4 -2.0 -1.6 -1.1 -0.5 o.o 0.6 1.3 1.9 2.6 3.3 

68 58504 58282 58052 57814 57570 57322 57069 56814 56557 56299 56041 55784 55530 55279 55032 54790 54553 54323 54101 

-8.0 -7.9 -7.7 -7.5 -7.2 -6.9 -6.6 -6.2 -5.8 -5.3 -4.8 -4.2 -3.6 -3.0 -2.3 -1.6 -0.9 -0.1 0.7 

66 58805 58560 58305 58041 57771 57494 57213 56928 56642 56354 56066 55780 55497 55217 54942 54672 54409 54154 53907 

-12.1 -12.0 -11.8 -11.6 -11.3 -11.0 -10.6 -10.2 -9.7 -9.1 -8.5 -7.9 -7.2 -6.5 -5.7 -4.9 -4.0 -3.1 -2.1 

64 59058 58790 58511 58223 57926 57622 57313 57000 56684 56367 56050 55736 55424 55116 54813 54518 54229 53950 53680 

-16.8 -16.7 -16.5 -16.3 -16.0 -15.6 -15.2 -14.6 -14.1 -13.4 -12.7 -12.0 -11.2 -10.3 -9.4 -8.4 -7.4 -6.4 -5.3 

62 59247 58959 58657 58345 58023 57693 57356 57015 56672 56326 55982 55639 55299 54965 54636 54315 54003 53701 53409 

-22.2 -22.1 -21.9 -21.6 -21.3 -20.8 -20.3 -19.7 -19.0 -18.2 -17.4 -16.5 -15.5 -14.5 -13.4 -12.3 -11.1 -9.9 -8.6 

60 59362 59054 58731 58396 58050 57695 57332 56964 56593 56221 55849 55479 55114 54753 54400 54056 53722 53398 53087 

-28.3 -28.2 -27.9 -27.6 -27.2 -26.6 -26.0 -25.3 -24.4 -23.5 -22.5 -21.4 -20.2 -19.0 -17.7 -16.4 -15.0 -13.5 -12.1 
co 

"0 

LONG 

LAT 

90 

88 

86 

84 

82 

80 

IGRF 1980 TOTAL INTENSITY (F) 

-36 -3 4 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 

56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 56753 

5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 

56380 56374 56369 56364 56360 56356 56353 56350 56348 56347 56346 56346 56346 56347 56349 56351 56354 56357 56361 

7.2 7.2 7.3 7.4 7.4 7.5 7.6 7.6 7.7 7.8 7.8 7.9 7.9 8.0 8.0 8.0 8.1 8.1 8.2 

56030 56014 55999 55985 55972 55961 55950 55941 55934 55927 55922 55919 55917 55916 55917 55919 55923 55928 55935 

8.5 8.7 8.8 9.0 9.1 9.3 9.4 9.5 9.7 9.8 9.9 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 

55710 55680 55651 55624 55599 55576 55555 55536 55519 55505 55493 55483 55476 55471 55469 55469 55472 55478 55486 

9.5 9.7 10.0 10.2 10.4 10.6 10.9 11.1 11.3 11.5 11.7 11.9 12.1 12.3 12.5 12.7 12.9 13.1 13.2 

55424 55376 55330 55287 55246 55209 55174 55142 55114 55089 55067 55048 55034 55023 55015 55012 55012 55016 55024 

10.1 10.4 10.7 11.0 11.3 11.6 11.9 12.2 12.5 12.8 13.1 13.5 13.8 14.0 14.3 14.6 14.9 15.2 15.4 

55172 55104 55038 54976 54918 54863 54812 54765 54722 54684 54650 54621 54597 54578 54563 54554 54550 54551 54557 

10.1 10.5 10.9 11.3 11.7 12.1 12.5 12.9 13.3 13.7 14.1 14.5 14.9 15.3 15.7 16.1 16.5 16.9 17.2 

78 54954 54863 54775 54692 54614 54540 54471 54407 54348 54295 54248 54206 54171 54142 54119 54102 54092 54089 54092 

9.7 10.2 10.6 11.1 11.6 12.1 12.6 13.1 13.6 14.1 14.6 15.1 15.7 16.2 16.7 17.2 17.7 18.2 18.7 

76 54763 54647 54537 54432 54332 54237 54149 54067 53991 53922 53860 53805 53757 53717 53685 53660 53643 53634 53633 

8.8 9.3 9.9 10.4 11.0 11.6 12.2 12.8 13.4 14.0 14.6 15.3 15.9 16.5 17.2 17.8 18.4 19.1 19.7 

74 54592 54452 54317 54189 54067 53951 53843 53742 53649 53563 53486 53417 53357 53305 53262 53228 53204 53189 53183 

7.4 8.0 8.6 9.3 9.9 10.6 11.3 12.0 12.7 13.4 14.2 14.9 15.7 16.4 17.2 18.0 18.7 19.5 20.2 

72 54432 54267 54108 53956 53812 53675 53547 53427 53316 53214 53122 53039 52966 52903 52850 52807 52775 52753 52742 

5.6 6.3 6.9 7.7 8.4 9.2 10.0 10.8 11.6 12.4 13.3 14.2 15.0 15.9 16.8 17.7 18.6 19.4 20.3 

70 54272 54082 53899 53724 53558 53401 53253 53115 52987 52869 52762 52666 52580 52506 52444 52392 52353 52325 52308 

3.3 4.1 4.9 5.7 6.5 7.4 8.3 9.2 10.1 11.1 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 

68 54101 53886 53680 53484 53297 53120 52953 52798 52654 52521 52400 52292 52195 52111 52040 51981 51934 51901 51880 

0.7 1.6 2.5 3.4 4.4 5.3 6.3 7.3 8.4 9.4 10.5 11.6 12.7 13.8 14.9 16.0 17.1 18.3 19.4 

66 53907 53669 53441 53223 53017 52821 52638 52466 52308 52162 52029 51909 51803 51711 51632 51566 51515 51477 51453 

-2.1 -1.2 -0.2 0.9 1.9 3.0 4.1 5.2 6.4 7.6 8.7 9.9 11.1 12.4 13.6 14.8 16.0 17.2 18.5 

64 53680 53420 53171 52934 52709 52497 52298 52113 51941 51784 51641 51512 51398 51298 51214 51144 51088 51048 51022 

-5.3 -4.2 -3.0 -1.9 -0.7 0.5 1.8 3.0 4.3 5.6 6.9 8.2 9.5 10.8 12.1 13.4 14.8 16.1 17.4 

62 53409 53129 52861 52607 52366 52139 51926 51729 51547 51380 51228 51093 50973 50868 50780 50707 50650 50608 50581 

-8.6 -7.3 -6.0 -4.7 -3.4 -2.0 -0.6 0.7 2.1 3.5 4.9 6.3 7.8 9.2 10.6 12.0 13.4 14.8 16.2 

60 53087 52788 52504 52234 51979 51739 51516 51308 51118 50943 50786 50646 50522 50415 50324 50251 50193 50152 50127 

-12.1 -10.6 -9.1 -7.6 -6.1 -4.6 -3.0 -1.5 o.o 1.5 3.1 4.6 6.1 7.6 9.1 10.6 12.1 13.6 15.0 
8 

LONG 

LAT 

60 

58 

56 

54 

52 

50 

48 

46 

44 

IGRF 1980 TOTAL INTENSITY (F) 

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 

50127 50118 50124 50145 50182 50233 50298 50378 50471 50578 50699 50833 50980 51140 51313 51498 51697 51908 52132 

15.0 16.5 17.9 19.3 20.6 21.9 23.2 24.3 25.5 26.5 27.4 28.3 29.0 29.6 30.2 30.6 30.9 31.0 31.1 

49654 49648 49658 49684 49725 49781 49852 49936 50034 50146 50271 50409 50560 50724 50900 51089 51290 51503 51730 

14.0 15.5 16.9 18.4 19.8 21.1 22.4 23.6 24.8 25.8 26.7 27.6 28.3 28.9 29.4 29.8 30.1 30.2 30.2 

49157 49157 49173 49204 49251 49313 49390 49480 49585 49702 49832 49975 50130 50297 50476 50667 50870 51086 51313 

13.0 14.6 16.1 17.6 19.0 20.4 21.7 23.0 24.1 25.2 26.1 27.0 27.7 28.3 28.7 29.0 29.2 29.3 29.2 

48634 48640 48663 48702 48756 48825 48909 49006 49117 49240 49376 49524 49683 49854 50037 50230 50435 50652 50880 

12.3 13.9 15.5 17.0 18.5 19.9 21.2 22.5 23.6 24.7 25.6 26.5 27.1 27.7 28.1 28.3 28.4 28.4 28.2 

48080 48095 48126 48173 48235 48313 48405 48510 48628 48758 48900 49053 49217 49392 49578 49774 49980 50198 50426 

11.8 13.4 15.0 16.6 18.1 19.5 20.9 22.2 23.4 24.4 25.3 26.1 26.8 27.2 27.6 27.7 27.8 27.6 27.3 

47495 47518 47558 47614 47686 47772 47873 47986 48112 48249 48398 48557 48726 48906 49094 49293 49501 49719 49947 

11.5 13.2 14.8 16.4 18.0 19.4 20.8 22.1 23.3 24.3 25.2 26.0 26.6 27.0 27.3 27.3 27.3 27.0 26.6 

46877 46909 46959 47024 47105 47201 47310 47432 47566 47711 47866 48032 48206 48390 48582 48783 48993 49212 49439 

11.4 13.1 14.8 16.4 18.0 19.5 20.9 22.2 23.4 24.4 25.3 26.1 26.6 27.0 27.2 27.2 27.0 26.6 26.1 

46224 46266 46325 46401 46491 46596 46714 46845 46987 47139 47302 47473 47653 47841 48037 48241 48453 48672 48899 

11.4 13.2 15.0 16.6 18.3 19.8 21.2 22.5 23.7 24.8 25.6 26.3 26.8 27.2 27.3 27.2 26.9 26.4 25.7 

45537 45589 45658 45743 45843 45957 46084 46223 46372 46532 46701 46879 47064 47256 47456 47662 47876 48096 48323 

11.6 13.5 15.2 17.0 18.6 20.2 21.6 23.0 24.2 25.2 26.1 26.8 27.2 27.5 27.5 27.4 27.0 26.4 25.6 

42 44815 44877 44956 45050 45159 45282 45417 45564 45721 45888 46063 46246 46436 46633 46836 47045 47259 47480 47708 

11.9 13.8 15.6 17.4 19.1 20.7 22.2 23.5 24.7 25.8 26.6 27.3 27.7 27.9 27.9 27.7 27.2 26.5 25.6 

40 44061 44132 44220 44323 44441 44572 44715 44869 45032 45205 45386 45574 45768 45969 46175 46386 46602 46824 47052 

12.2 14.1 16.0 17.8 19.5 21.1 22.7 24.1 25.3 26.3 27.2 27.8 28.2 28.4 28.3 28.0 27.4 26.7 25.7 

38 43275 43355 43452 43563 43689 43827 43977 44138 44307 44486 44671 44863 45061 45265 45473 45686 45904 46127 46354 

12.4 14.4 16.3 18.1 19.9 21.6 23.1 24.5 25.8 26.8 27.7 28.3 28.7 28.8 28.7 28.3 27.7 26.8 25.8 

36 42461 42549 42654 42773 42906 43051 43207 43373 43548 43731 43920 44116 44317 44522 44733 44947 45166 45389 45616 

12.5 14.5 16.5 18.4 20.2 21.9 23.4 24.9 26.1 27.2 28.0 28.6 29.0 29.1 28.9 28.5 27.8 26.9 25.8 

34 41621 41718 41830 41957 42096 42247 42408 42579 42758 42944 43137 43335 43537 43745 43956 44171 44390 44613 44839 

12.5 14.6 16.6 18.5 20.3 22.0 23.6 25.0 26.3 27.3 28.2 28.7 29.1 29.1 28.9 28.4 27.7 26.8 25.6 

32 40761 40866 40985 41118 41263 41420 41586 41761 41943 42131 42326 42525 42729 42937 43148 43363 43582 43804 44029 

12.4 14.5 16.5 18.4 20.2 21.9 23.5 24.9 26.2 27.2 28.0 28.6 28.8 28.9 28.6 28.1 27.3 26.3 25.1 

30 39886 39999 40125 40264 40415 40576 40746 40924 41109 41299 41495 41694 41898 42105 42316 42530 42747 42968 43191 

12.2 14.3 16.3 18.2 19.9 21.6 23.2 24.6 25.8 26.8 27.5 28.0 28.3 28.2 27.9 27.4 26.6 25.6 24.3 
~ 

LONG 

LAT 

60 

58 

56 

54 

52 

50 

IGRF 1980 TOTAL INTENSITY (F) 

36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 

52132 52369 52618 52880 53154 53440 53738 54048 54367 54697 55036 55384 55738 56098 56462 56829 57196 57563 57927 

31.1 31.0 30.9 30.6 30.2 29.8 29.2 28.5 27.8 27.0 26.2 25.·3 24.3 23.3 22.3 21.2 20.2 19.1 18.0 

51730 51969 52220 52485 52761 53051 53352 53665 53990 54325 54670 55024 55385 55754 56127 56504 56882 57259 57635 

30.2 30.0 29.8 29.4 29.0 28.4 27.7 27.0 26.2 25.3 24.4 23.4 22.4 21.3 20.3 19.2 18.1 17.1 16.0 

51313 51553 51806 52070 52348 52638 52940 53254 53580 53917 54265 54622 54988 55361 55739 56122 56507 56891 57274 

29.2 28.9 28.6 28.1 27.6 26.9 26.1 25.3 24.4 23.4 22.4 21.3 20.2 19.1 18.0 16.9 15.8 14.8 13.7 

50880 51120 51371 51635 51912 52200 52501 52814 53139 53476 53823 54180 54546 54920 55301 55685 56073 56461 56848 

28.2 27.8 27.4 26.8 26.1 25.3 24.4 23.5 22.5 21.4 20.3 19.1 18.0 16.8 15.7 14.5 13.4 12.3 11.3 

50426 50665 50915 51177 51451 51737 52035 52345 52667 53000 53344 53699 54062 54434 54812 55196 55582 55970 56356 

27.3 26.8 26.3 25.6 24.7 23.8 22.8 21.7 20.6 19.4 18.2 16.9 15.7 14.5 13.2 12.1 10.9 9.9 8.9 

49947 50185 50433 50693 50963 51246 51539 51844 52161 52489 52828 53178 53536 53903 54276 54655 55037 55421 55803 

26.6 26.0 25.3 24.4 23.5 22.4 21.3 20.0 18.8 17.5 16.1 14.8 13.5 12.2 10.9 9.7 8.6 7.5 6.5 

48 49439 49676 49923 50179 50446 50723 51012 51311 51622 51944 52276 52617 52968 53328 53693 54064 54439 54815 55191 

26.1 25.4 24.5 23.5 22.4 21.2 19.9 18.6 17.2 15.8 14.3 12.9 11.5 10.1 8.8 7.5 6.3 5.2 4.2 

46 48899 49135 49379 49633 49895 50168 50451 50744 51047 51361 51685 52018 52359 52709 53065 53425 53790 54156 54521 

25.7 24.9 23.9 22.8 21.6 20.2 18.8 17.3 15.8 14.3 12.7 11.2 9.7 8.3 6.9 5.6 4.4 3.3 2.2 

44 48323 48557 48800 49050 49309 49577 49854 50140 50436 50741 51055 51378 51709 52047 52391 52739 53091 53444 53796 

25.6 24.6 23.5 22.3 20.9 19.5 17.9 16.3 14.7 13.1 11.4 9.8 8.3 6.7 5.3 3.9 2.7 1.6 0.5 

42 47708 47941 48182 48429 48685 48947 49219 49498 49786 50082 50386 50698 51017 51342 51673 52007 52345 52683 53020 

25.6 24.5 23.3 22.0 20.5 18.9 17.3 15.6 13.8 12.1 10.4 8.7 7.1 5.5 4.0 2.7 1.4 0.2 -0.8 

40 47052 47284 47523 47768 48020 48278 48544 48816 49096 49383 49677 49978 50284 50596 50912 51231 51553 51874 52194 

25.7 24.5 23.2 21.8 20.2 18.5 16.8 15.0 13.2 11.4 9.7 7.9 6.3 4.6 3.1 1.7 0.4 -0.8 -1.8 

38 46354 46586 46824 47066 47315 47569 47829 48095 48367 48645 48928 49217 49511 49809 50110 50413 50718 51022 51324 

25.8 24.5 23.1 21.6 19.9 18.2 16.4 14.6 12.8 10.9 9.1 7.4 5.7 4.0 2.5 1.1 -0.3 -1.5 -2.5 

36 45616 45847 46083 46324 46569 46819 47074 47334 47598 47867 48141 48418 48699 48983 49269 49556 49843 50129 50413 

25.8 24.5 23.0 21.4 19.7 17.9 16.1 14.3 12.4 10.6 8.8 7.0 5.3 3.7 2.1 0.7 -0.6 -1.8 -2.9 

34 44839 45070 45304 45542 45785 46031 46281 46535 46792 47053 47317 47583 47852 48122 48393 48664 48934 49201 49466 

25.6 24.2 22.7 21.1 19.4 17.6 15.8 13.9 12.1 10.3 8.5 6.8 5.1 3.5 2.0 0.5 -0.8 -2.0 -3.0 

32 44029 44258 44491 44726 44965 45208 45453 45701 45952 46205 46459 46715 46972 47229 47486 47741 47994 48245 48492 

25.1 23.8 22.2 20.6 18.9 17.1 15.3 13.5 11.7 9.9 8.2 6.5 4.9 3.4 1.9 0.5 -0.8 -1.9 -2.9 

30 43191 43418 43648 43881 44117 44355 44596 44838 45083 45328 45574 45820 46066 46311 46554 46795 47033 47267 47497 

24.3 22.9 21.4 19.8 18.1 16.4 14.6 12.9 11.1 9.5 7.8 6.2 4.7 3.2 1.8 0.5 -0.7 -1.8 -2.8 
-o 

"'-> 

LONG 

LAT 

60 

58 

56 

54 

52 

50 

48 

46 

44 

IGRF 1980 TOTAL INTENSITY (F) 

72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 10 2 104 106 108 

57927 58286 58638 58980 59311 59628 59929 60212 60475 60715 60932 61122 61285 61419 61524 61597 61639 61648 61625 

18.0 16.9 15.9 14.8 13.8 12.7 11.7 10.7 9.7 8.8 7.8 6.9 6.0 5.1 4.2 3.4 2.5 1.7 0.9 

57635 58005 58369 58723 59066 59394 59706 59999 60270 60518 60741 60936 61102 61237 61340 61410 61446 61447 61414 

16.0 14.9 13.9 12.9 11.9 11.0 10.1 9.2 8.4 7.5 6.7 6.0 5.2 4.5 3.8 3.1 2.4 1.8 1.1 

57274 57653 58025 58387 58738 59074 59393 59693 59970 60224 60450 60648 60815 60949 61050 61115 61145 61137 61093 

13.7 12.7 11.7 10.8 9.9 9.1 8.3 7.5 6.8 6.2 5.5 5.0 4.4 3.9 3.4 2.9 2.4 1.9 1.5 

56848 57230 57606 57973 58328 58669 58992 59295 59576 59832 60060 60258 60424 60556 60653 60713 60736 60719 60664 

11.3 10.3 9.4 8.6 7.8 7.0 6.4 5.8 5.2 4.7 4.3 3.9 3.6 3.2 3.0 2.7 2.4 2.2 1.9 

56356 56739 57116 57483 57839 58181 58505 58809 59090 59345 59572 59769 59932 60061 60153 60207 60222 60196 60130 

8.9 7.9 7.1 6.3 5.6 4.9 4.4 3.9 3.6 3.3 3.0 2.9 2.7 2.6 2.6 2.6 2.5 2.5 2.5 

55803 56183 56556 56920 57274 57612 57934 58235 58514 58766 58990 59183 59342 59466 59552 59600 59607 59572 59496 

6.5 5.6 4.7 4.0 3.4 2.9 2.5 2.2 2.0 1.9 1.8 1.9 2.0 2.1 2.3 2.5 2.8 3.0 3.2 

55191 55563 55929 56288 56635 56968 57283 57579 57852 58099 58318 58505 58658 58776 58856 58896 58895 58852 58766 

4.2 3.4 2.6 1.9 1.4 1.0 0.7 0.5 0.5 0.6 0.7 1.0 1.3 1.7 2.1 2.6 3.1 3.5 4.0 

54521 54883 55240 55588 55926 56250 56557 56844 57109 57348 57559 57739 57886 57996 58069 58102 58093 58042 57947 

2.2 1.4 0.6 o.o -0.4 -0.8 -0.9 -1.0 -0.8 -0.6 -0.2 0.2 0.8 1.4 2.1 2.8 3.5 4.2 4.9 

53796 54145 54489 54825 55151 55463 55759 56035 56290 56519 56721 56892 57030 57133 57198 57223 57207 57148 57046 

0.5 -0.3 -1.0 -1.6 -2.0 -2.3 -2.3 -2.2 -2.0 -1.6 -1.0 -0.4 0.4 1.2 2.1 3.1 4.0 4.9 5.9 

42 53020 53354 53682 54003 54314 54612 54894 55158 55400 55618 55809 55970 56099 56193 56249 56267 56244 56178 56070 

-0.8 -1.7 -2.4 -2.9 -3.3 -3.5 -3.4 -3.2 -2.9 -2.3 -1.6 -0.8 0.2 1.2 2.3 3.5 4.6 5.8 6.9 

40 52194 52511 52823 53127 53421 53703 53969 54218 54446 54651 54830 54980 55099 55184 55232 55243 55213 55142 55027 

-1.8 -2.7 -3.4 -3.9 -4.2 -4.4 -4.3 -4.0 -3.5 -2.8 -2.0 -1.0 0.1 1.4 2.7 4.0 5.4 6.7 8.0 

38 51324 51623 51916 52201 52477 52741 52991 53223 53436 53627 53793 53931 54039 54115 54156 54159 54123 54047 53929 

-2.5 -3.4 -4.1 -4.6 -4.9 -4.9 -4.8 -4.4 -3.9 -3.1 -2.1 -1.0 0.3 1.7 3.1 4.6 6.2 7.7 9.1 

36 50413 50692 50966 51233 51489 51735 51967 52182 52379 52555 52708 52834 52931 52997 53030 53027 52986 52906 52785 

-2.9 -3.7 -4.4 -4.9 -5.2 -5.3 -5.1 -4.6 -4.0 -3.1 -2.1 -0.8 0.6 2.1 3.7 5.4 7.0 8.7 10.2 

34 49466 49727 49981 50228 50466 50693 50906 51104 51285 51446 51585 51699 51786 51843 51868 51859 51814 51730 51608 

-3.0 -3.9 -4.5 -5.0 -5.3 -5.3 -5.1 -4.6 -3.9 -3.0 -1.8 -0.5 1.0 2.7 4.4 6.2 7.9 9.7 11.4 

32 48492 48733 48969 49197 49416 49624 49820 50001 50166 50312 50438 50540 50616 50664 50683 50668 50619 50534 50410 

-2.9 -3.8 -4.4 -4.9 -5.1 -5.1 -4.9 -4.4 -3.6 -2.6 -1.4 o.o 1.6 3.3 5.2 7.0 8.9 10.7 12.4 

30 47497 47721 47939 48149 48351 48541 48720 48886 49035 49167 49280 49371 49437 49478 49489 49470 49418 49331 49209 

-2.8 -3.6 -4.2 -4.6 -4.9 -4.8 -4.5 -4.0 -3.2 -2.2 -0.9 0.6 2.3 4.1 5.9 7.9 9.8 11.7 13.4 
'() 

w 

LONG 

LAT 

60 

58 

56 

54 

52 

50 

IGRF 1980 TOTAL INTENSITY (F) 

108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 

61625 61570 61482 61364 61214 61035 60827 60592 60333 60050 59746 59424 59085 58733 58370 57998 57621 57240 56860 

0.9 0.1 -0.7 -1.5 -2.3 -3.1 -3.8 -4.6 -5.3 -6.0 -6.6 -7.3 -7.9 -8.5 -9.0 -9.5 -9.9 -10.3 -10.7 

61414 61345 61242 61106 60936 60734 60501 60240 59952 59639 59303 58948 58576 58189 57791 57384 56972 56557 56143 

1.1 0.5 -0.2 -0.8 -1.5 -2.1 -2.7 -3.3 -3.9 -4.5 -5.1 -5.7 -6.2 -6.7 -7.2 -7.7 -8.1 -8.5 -8.9 

61093 61011 60893 60739 60549 60325 60069 59782 59466 59125 58759 58373 57968 57549 57118 56678 56233 55786 55341 

1.5 1.0 0.5 0.1 -0.4 -0.9 -1.3 -1.8 -2.3 -2.8 -3.3 -3.8 -4.2 -4.7 -5.1 -5.5 -5.9 -6.3 -6.7 

60664 60570 60437 60265 60057 59812 59534 59223 58881 58513 58119 57704 57270 56820 56358 55888 55413 54937 54463 

1.9 1.7 1.4 1.2 0.9 0.6 0.2 -0.1 -0.4 -0.8 -1.2 -1.6 -1.9 -2.3 -2.7 -3.1 -3.5 -3.8 -4.2 

60130 60024 59877 59690 59464 59200 58901 58568 58203 57810 57390 56948 56487 56010 55521 55024 54522 54019 53518 

2.5 2.5 2.4 2.4 2.3 2.2 2.0 1.8 1.6 1.4 1.1 0.9 0.6 0.2 -0.1 -0.4 -0.8 -1.1 -1.5 

59496 59378 59218 59016 58775 58494 58176 57823 57438 57022 56580 56115 55630 55128 54615 54093 53567 53041 52519 

3.2 3.4 3.6 3.7 3.8 3.9 3.9 3.9 3.8 3.7 3.6 3.4 3.2 3.0 2.7 2.4 2.1 1.7 1.4 

48 58766 58638 58466 58252 57996 57700 57367 56996 56593 56158 55697 55211 54705 54183 53649 53107 52561 52015 51474 

4.0 4.4 4.8 5.2 5.5 5.7 5.9 6.0 6.1 6.1 6.1 6.0 5.9 5.7 5.5 5.3 5.0 4.7 4.3 

46 57947 57809 57627 57402 57135 56827 56479 56095 55676 55226 54749 54246 53724 53184 52633 52074 51512 50950 50394 

4.9 5.5 6.2 6.7 7.2 7.6 8.0 8.2 8.4 8.6 8.6 8.6 8.6 8.5 8.3 8.1 7.8 7.5 7.2 

44 57046 56900 56710 56476 56199 55881 55523 55127 54697 54235 53744 53229 52693 52141 51577 51005 50430 49856 49289 

5.9 6.7 7.5 8.3 8.9 9.5 10.0 10.4 10.7 10.9 11.1 11.1 11.2 11.1 11.0 10.8 10.6 10.3 9.9 

42 56070 55917 55720 55480 55196 54871 54505 54102 53663 53192 52693 52169 51624 51062 50489 49908 49325 48744 48169 

6.9 8.0 8.9 9.8 10.7 11.4 12.0 12.5 12.9 13.2 13.4 13.5 13.6 13.6 13.5 13.3 13.1 12.9 12.5 

40 55027 54870 54668 54423 54135 53805 53435 53027 52584 52108 51604 51074 50524 49958 49380 48794 48207 47622 47045 

8.0 9.2 10.4 11.4 12.3 13.1 13.8 14.4 14.9 15.2 15.5 15.7 15.8 15.8 15.7 15.6 15.4 15.1 14.8 

38 53929 53768 53564 53316 53026 52695 52323 51914 51469 50992 50486 49955 49404 48837 48258 47673 47086 46501 45925 

9.1 10.5 11.8 12.9 13.9 14.8 15.6 16.2 16.7 17.1 17.4 17.5 17.6 17.7 17.6 17.5 17.3 17.1 16.7 

36 52785 52622 52417 52169 51880 51549 51179 50771 50328 49853 49350 48822 48274 47710 47135 46554 45971 45391 44819 

10.2 11.7 13.1 14.3 15.4 16.4 17.2 17.8 18.3 18.7 18.9 19.1 19.2 19.2 19.2 19.1 18.9 18.7 18.3 

34 51608 51444 51240 50994 50707 50380 50014 49611 49173 48704 48207 47686 47145 46588 46020 45447 44872 44301 43738 

11.4 12.9 14.4 15.7 16.8 17.7 18.5 19.2 19.6 20.0 20.2 20.4 20.5 20.5 20.4 20.3 20.1 19.9 19.5 

32 50410 50248 50046 49804 49521 49200 48841 48445 48016 47556 47068 46557 46026 45481 44924 44362 43800 43241 42691 

12.4 14.1 15.5 16.8 18.0 18.9 19.7 20.3 20.7 21.0 21.2 21.3 21.3 21.3 21.2 21.1 20.9 20.6 20.3 

30 49209 49048 48850 48613 48337 48023 47673 47287 46869 46421 45946 45449 44932 44401 43859 43312 42765 42222 41688 

13.4 15.1 16.6 17.9 19.0 19.9 20.7 21.2 21.6 21.8 21.9 22.0 21.9 21.8 21.7 21.5 21.3 21.1 20.8 
'f 

LONG 

LAT 

60 

58 

56 

54 

52 

50 

48 

46 

44 

IGRF 1980 TOTAL INTENSITY (F) 

144 146 148 150 152 154 156 158 160 162 164 166 168 170 1 7 2 174 176 178 180 

56860 56483 56111 55747 55393 55052 54727 54419 54131 53864 53620 53401 53207 53040 52901 52791 52710 52659 52637 

-10.7 -11.0 -11.3 -11.5 -11.6 -11.7 -11.8 -11.7 -11.6 -11.5 -11.2 -11.0 -10.6 -10.2 -9.7 -9.1 -8.5 -7.9 -7.2 

56143 55733 55329 54934 54552 54184 53834 53503 53194 52908 52648 52415 52211 52035 51891 51777 51695 51645 51627 

-8.9 -9.2 -9.5 -9.7 -9.9 -10.1 -10.2 -10.2 -10.2 -10.1 -10.0 -9.8 -9.5 -9.2 -8.8 -8.3 -7.8 -7.2 -6.6 

55341 54900 54466 54044 53635 53243 52870 52518 52190 51889 51614 51369 51155 50973 50823 50707 50625 50577 50563 

-6.7 -7.0 -7.3 -7.6 -7.9 -8.1 -8.3 -8.4 -8.5 -8.5 -8.5 -8.5 -8.3 -8.1 -7.9 -7.5 -7.1 -6.6 -6.1 

54463 53994 53534 53086 52654 52239 51846 51476 51132 50816 50530 50275 50053 49865 49711 49594 49512 49466 49456 

-4.2 -4.6 -4.9 -5.2 -5.6 -5.9 -6.1 -6.4 -6.6 -6.8 -6.9 -7.0 -7.1 -7.0 -6.9 -6.7 -6.4 -6.1 -5.7 

53518 53025 52542 52072 51618 51185 50774 50389 50031 49704 49407 49144 48916 48724 48568 48449 48368 48325 48319 

-1.5 -1.9 -2.3 -2.7 -3.0 -3.4 -3.8 -4.2 -4.6 -4.9 -5.3 -5.5 -5.7 -5.9 -6.0 -6.0 -5.9 -5.7 -5.4 

52519 52004 51500 51011 50541 50091 49666 49268 48900 48563 48259 47990 47758 47563 47405 47287 47207 47167 47165 

1.4 1.0 0.5 0.1 -0.4 -0.9 -1.4 -1.9 -2.5 -3.0 -3.5 -4.0 -4.4 -4.8 -5.1 -5.3 -5.4 -5.5 -5.4 

51474 50941 50420 49916 49431 48969 48533 48125 47749 47405 47096 46824 46589 46393 46236 46119 46041 46004 46005 

4.3 3.9 3.4 2.9 2.3 1.7 1.1 0.4 -0.3 -1.0 -1.8 -2.5 -3.2 -3.8 -4.3 -4.8 -5.1 -5.3 -5.4 

50394 49847 49313 48797 48301 47830 47386 46972 46590 46242 45931 45657 45422 45227 45071 44956 44882 44847 44853 

7.2 6.7 6.2 5.7 5.0 4.3 3.5 2.7 1.8 0.9 -0.1 -1.0 -1.9 -2.8 -3.6 -4.3 -4.9 -5.4 -5.7 

49289 48732 48189 47664 47162 46685 46236 45818 45434 45085 44774 44501 44268 44075 43922 43811 43740 43709 43718 

9.9 9.5 8.9 8.3 7.6 6.8 5.9 4.9 3.9 2.7 1.6 0.4 -0.8 -1.9 -3.0 -4.0 -4.8 -5.5 -6.1 

42 48169 47606 47058 46529 46023 45543 45093 44675 44291 43944 43635 43366 43136 42947 42799 42692 42626 42599 42612 

12.5 12.0 11.5 10.8 10.0 9.2 8.1 7.0 5.8 4.5 3.1 1.7 0.2 -1.2 -2.5 -3.7 -4.8 -5.8 -6.6 

40 47045 46479 45929 45399 44894 44415 43967 43551 43172 42829 42525 42261 42037 41854 41712 41611 41549 41528 41545 

14.8 14.3 13.8 13.1 12.2 11.3 10.2 8.9 7.5 6.1 4.5 2.8 1.2 -0.5 -2.1 -3.6 -5.0 -6.1 -7.1 

38 45925 45361 44813 44286 43784 43310 42867 42457 42084 41748 41451 41194 40978 40803 40668 40574 40519 40502 40524 

16.7 16.3 15.7 15.0 14.1 13.1 11.9 10.6 9.1 7.4 5.7 3.8 1.9 o.o -1.8 -3.5 -5.1 -6.6 -7.8 

36 44819 44261 43719 43199 42704 42237 41802 41401 41037 40710 40423 40175 39968 39802 39676 39589 39541 39530 39556 

18.3 17.9 17.3 16.6 15.7 14.7 13.4 12.0 10.4 8.6 6.7 4.7 2.6 0.5 -1.6 -3.6 -5.4 -7.0 -8.4 

34 43738 43189 42657 42147 41662 41206 40781 40392 40038 39723 39447 39210 39014 38858 38741 38663 38622 38617 38648 

19.5 19.1 18.5 17.8 16.9 15.9 14.6 13.1 11.4 9.5 7.5 5.3 3.1 0.8 -1.5 -3.6 -5.6 -7.5 -9.1 

32 42691 42154 41635 41138 40666 40224 39813 39436 39096 38794 38530 38306 38122 37976 37870 37800 37767 37769 37803 

20.3 19.9 19.4 18.7 17.8 16.7 15.4 13.9 12.2 10.2 8.1 5.8 3.4 1.0 -1.4 -3.7 -5.9 -7.9 -9.7 

30 41688 41167 40664 40183 39727 39300 38904 38543 38217 37929 37680 37469 37297 37163 37066 37006 36980 36987 37026 

20.8 20.3 19.8 19.1 18.3 17.2 15.9 14.4 12.6 10.7 8.5 6.1 3.7 1.1 -1.4 -3.9 -6.2 -8.3 -10.2 
~ 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 180 -178 -176 -174 -172 -170 -168 -166 -164 -162 -160 -158 -156 -154 -152 -150 -148 -146 -144 

LAT 

60 

58 

56 

54 

52 

50 

52637 52644 52681 52746 52840 52961 53108 53280 53477 53695 53934 54192 54468 54758 55062 55378 55702 56034 56371 

-7.2 -6.5 -5.7 -4.9 -4.1 -3.4 -2.6 -1.9 -1.2 -0.7 -0.1 0.3 0.6 0.8 0.9 0.9 0.8 0.5 0.1 

51627 51642 51687 51764 51871 52008 52173 52365 52582 52824 53088 53372 53675 53995 54329 54675 55031 55396 55765 

-6.6 -5.9 -5.2 -4.4 -3.7 -2.9 -2.2 -1.5 -0.9 -0.3 0.2 0.6 0.8 1.0 1.0 0.9 0.6 0.2 -0.4 

50563 50584 50638 50725 50844 50995 51176 51385 51622 51885 52171 52479 52806 53151 53512 53886 54271 54664 55063 

-6.1 -5.5 -4.8 -4.1 -3.4 -2.7 -2.0 -1.4 -0.8 -0.2 0.2 0.6 0.8 0.9 0.8 0.6 0.2 -0.4 -1.1 

49456 49483 49544 49641 49771 49934 50129 50353 50607 50887 51192 51520 51869 52236 52620 53017 53426 53844 54269 

-5.7 -5.2 -4.6 -4.0 -3.4 -2.7 -2.1 -1.5 -0.9 -0.4 0.1 0.4 0.5 0.5 0.4 o.o -0.5 -1.2 -2.1 

48319 48351 48419 48524 48663 48837 49043 49280 49547 49842 50162 50507 50873 51258 51661 52078 52507 52946 53392 

-5.4 -5.1 -4.6 -4.1 -3.6 -3.0 -2.4 -1.8 -1.2 -0.8 -0.4 -0.1 o.o -0.1 -0.3 -0.7 -1.3 -2.2 -3.2 

47165 47201 47275 47386 47533 47715 47930 48177 48455 48761 49093 49450 49830 50229 50646 51078 51523 51979 52442 

-5.4 -5.2 -4.9 -4.5 -4.0 -3.5 -2.9 -2.4 -1.9 -1.4 -1.1 -0.8 -0.8 -0.9 -1.2 -1.7 -2.4 -3.4 -4.6 

48 46005 46046 46125 46241 46394 46582 46804 47058 47343 47657 47997 48363 48751 49160 49588 50031 50487 50954 51430 

-5.4 -5.4 -5.3 -5.0 -4.6 -4.2 -3.7 -3.2 -2.7 -2.3 -2.0 -1.8 -1.7 -1.9 -2.2 -2.8 -3.6 -4.7 -6.1 

46 44853 44897 44980 45101 45258 45450 45676 45934 46224 46542 46887 47258 47651 48066 48499 48948 49411 49885 50369 

-5.7 -5.8 -5.9 -5.7 -5.5 -5.1 -4.7 -4.2 -3.8 -3.4 -3.1 -2.9 -2.8 -3.0 -3.4 -4.1 -5.0 -6.2 -7.7 

44 43718 43766 43853 43976 44136 44330 44558 44819 45109 45429 45775 46147 46541 46957 47392 47843 48308 48785 49272 

-6.1 -6.4 -6.6 -6.6 -6.5 -6.2 -5.9 -5.4 -5.0 -4.6 -4.3 -4.1 -4.1 -4.3 -4.8 -5.5 -6.5 -7.8 -9.4 

42 42612 42664 42753 42879 43040 43235 43463 43722 44011 44329 44673 45042 45434 45847 46279 46728 47192 47668 48153 

-6.6 -7.1 -7.5 -7.6 -7.6 -7.5 -7.2 -6.8 -6.4 -6.0 -5.7 -5.5 -5.5 -5.8 -6.2 -7.0 -8.1 -9.5 -11.1 

40 41545 41600 41691 41818 41979 42173 42399 42655 42940 43253 43592 43955 44341 44748 45174 45617 46074 46544 47025 

-7.1 -7.9 -8.4 -8.7 -8.8 -8.8 -8.5 -8.2 -7.8 -7.5 -7.2 -7.0 -7.0 -7.3 -7.8 -8.6 -9.7 -11.2 -13.0 

38 40524 40581 40675 40802 40962 41153 41375 41626 41905 42211 42541 42896 43272 43670 44086 44519 44966 45427 45899 

-7.8 -8.7 -9.4 -9.9 -10.1 -10.1 -10.0 -9.7 -9.3 -9.0 -8.7 -8.5 -8.6 -8.8 -9.4 -10.2 -11.4 -13.0 -14.8 

36 39556 39617 39711 39838 39996 40184 40400 40644 40915 41210 41530 41873 42237 42621 43024 43444 43879 44326 44785 

-8.4 -9.6 -10.4 -11.0 -11.4 -11.5 -11.4 -11.1 -10.8 -10.5 -10.2 -10.1 -10.1 -10.4 -11.0 -11.9 -13.2 -14.8 -16.7 

34 38648 38711 38806 38932 39087 39270 39479 39715 39974 40258 40565 40893 41242 41610 41997 42400 42819 43251 43694 

-9.1 -10.4 -11.4 -12.1 -12.6 -12.7 -12.7 -12.5 -12.3 -12.0 -11.7 -11.6 -11.7 -12.0 -12.7 -13.6 -14.9 -16.6 -18.6 

32 37803 37869 37965 38089 38239 38416 38617 38842 39089 39359 39650 39961 40293 40643 41011 41395 41794 42207 42631 

-9.7 -11.1 -12.3 -13.1 -13.7 -13.9 -14.0 -13.9 -13.7 -13.4 -13.2 -13.2 -13.3 -13.7 -14.3 -15.4 -16.7 -18.5 -20.5 

30 37026 37093 37189 37310 37456 37625 37816 38029 38262 38516 38789 39082 39393 39723 40069 40432 40809 41200 41603 

-10.2 -11.8 -13.1 -14.0 -14.7 -15.0 -15.2 -15.1 -15.0 -14.8 -14.6 -14.6 -14.8 -15.3 -16.0 -17.1 -18.6 -20.3 -22.5 
~ 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -144 -142 -140 -138 -136 -134 -132 -130 -128 -126 -124 -122 -120 -118 -116 -114 -112 -110 -108 

LAT 

60 

58 

56 

54 

52 

50 

48 

46 

44 

42 

40 

38 

56371 56711 57052 57392 57729 58061 58386 58702 59008 59303 59584 59850 60099 60332 60545 60739 60912 61063 61192 

0.1 -0.4 -1.0 -1.8 -2.6 -3.5 -4.5 -5.6 -6.7 -7.8 -9.0 -10.2 -11.4 -12.5 -13.7 -14.9 -16.0 -17.1 -18.2 

55765 56139 56513 56887 57257 57623 57981 58331 58670 58996 59309 59606 59886 60147 60389 60611 60810 60986 61139 

-0.4 -1.1 -1.9 -2.8 -3.9 -5.0 -6.3 -7.6 -8.9 -10.3 -11.7 -13.2 -14.6 -16.0 -17.4 -18.8 -20.1 -21.4 -22.7 

55063 55466 55871 56275 56676 57072 57461 57842 58211 58568 58910 59236 59545 59835 60105 60353 60579 60781 60958 

-1.1 -2.0 -3.0 -4.2 -5.4 -6.8 -8.3 -9.8 -11.5 -13.1 -14.8 -16.5 -18.1 -19.8 -21.4 -23.0 -24.6 -26.1 -27.5 

54269 54699 55130 55561 55989 56412 56829 57237 57634 58018 58388 58741 59077 59394 59691 59965 60217 60444 60645 

-2.1 -3.1 -4.3 -5.7 -7.2 -8.8 -10.6 -12.4 -14.2 -16.1 -18.1 -20.0 -21.9 -23.8 -25.7 -27.5 -29.2 -31.0 -32.6 

53392 53843 54297 54751 55202 55649 56089 56521 56942 57351 57746 58124 58485 58828 59149 59449 59725 59976 60202 

-3.2 -4.5 -5.9 -7.5 -9.2 -11.1 -13.0 -15.1 -17.2 -19.3 -21.5 -23.7 -25.8 -28.0 -30.0 -32.1 -34.1 -36.0 -37.8 

52442 52911 53382 53854 54325 54791 55251 55703 56145 56575 56992 57392 57776 58141 58485 58808 59108 59383 59632 

-4.6 -6.0 -7.6 -9.4 -11.3 -13.4 -15.6 -17.9 -20.3 -22.7 -25.1 -27.5 -29.8 -32.2 -34.5 -36.7 -38.9 -41.0 -43.0 

51430 51911 52396 52882 53367 53849 54325 54794 55253 55700 56135 56555 56958 57343 57708 58052 58374 58670 58941 

-6.1 -7.6 -9.4 -11.4 -13.5 -15.9 -18.3 -20.8 -23.4 -26.0 -28.6 -31.2 -33.8 -36.3 -38.8 -41.2 -43.6 -45.9 -48.1 

50369 50859 51353 51848 52343 52836 53324 53805 54277 54738 55188 55623 56042 56445 56828 57191 57531 57848 58139 

-7.7 -9.4 -11.3 -13.5 -15.8 -18.3 -21.0 -23.7 -26.5 -29.3 -32.1 -34.9 -37.6 -40.3 -42.9 -45.5 -48.0 -50.5 -52.9 

49272 49766 50264 50765 51266 51765 52260 52749 53231 53702 54163 54610 55042 55458 55857 56235 56592 56927 57236 

-9.4 -11.2 -13.3 -15.6 -18.1 -20.8 -23.6 -26.5 -29.5 -32.4 -35.4 -38.3 -41.2 -44.1 -46.8 -49.5 -52.2 -54.8 -57.3 

48153 48646 49145 49647 50149 50651 51149 51642 52129 52606 53074 53529 53971 54397 54807 55198 55569 55918 56243 

-11.1 -13.1 -15.3 -17.8 -20.5 -23.3 -26.2 -29.3 -32.3 -35.4 -38.5 -41.6 -44.5 -47.5 -50.3 -53.1 -55.9 -58.6 -61.2 

47025 47514 48008 48507 49007 49506 50004 50497 50984 51464 51935 52394 52842 53275 53693 54093 54474 54835 55172 

-13.0 -15.0 -17.4 -19.9 -22.7 -25.7 -28.7 -31.9 -35.1 -38.2 -41.4 -44.5 -47.5 -50.5 -53.4 -56.3 -59.0 -61.8 -64.5 

45899 46379 46866 47357 47851 48345 48837 49327 49811 50289 50759 51219 51668 52104 52526 52932 53320 53689 54036 

-14.8 -17.0 -19.4 -22.1 -25.0 -28.0 -31.1 -34.3 -37.6 -40.8 -44.0 -47.1 -50.1 -53.1 -56.0 -58.8 -61.6 -64.4 -67.2 

36 44785 45254 45729 46209 46693 47177 47661 48143 48621 49093 49558 50015 50461 50897 51319 51727 52118 52491 52844 

-16.7 -18.9 -21.4 -24.2 -27.1 -30.2 -33.4 -36.6 -39.9 -43.1 -46.2 -49.3 -52.3 -55.2 -58.0 -60.8 -63.6 -66.4 -69.1 

34 43694 44147 44607 45073 45543 46014 46486 46956 47424 47886 48343 48793 49234 49664 50083 50489 50880 51254 51608 

-18.6 -20.9 -23.5 -26.3 -29.2 -32.4 -35.5 -38.7 -41.9 -45.1 -48.1 -51.1 -54.0 -56.8 -59.5 -62.2 -64.9 -67.6 -70.3 

32 42631 43065 43508 43956 44409 44864 45321 45776 46230 46679 47124 47563 47994 48416 48828 49228 49615 49986 50339 

-20.5 -22.9 -25.5 -28.3 -31.3 -34.4 -37.5 -40.7 -43.8 -46.8 -49.7 -52.6 -55.3 -57.9 -60.5 -63.0 -65.6 -68.1 -70.8 

30 41603 42016 42437 42865 43298 43734 44172 44609 45046 45479 45909 46333 46751 47161 47563 47953 48332 48696 49045 

-22.5 -24.9 -27.5 -30.3 -33.3 -36.4 -39.4 -42.5 -45.4 -48.3 -51.0 -53.6 -56.1 -58.5 -60.9 -63.2 -65.6 -68.0 -70.6 
'() 

....... 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -108 -106 -104 -102 -100 -98 -96 -94 -92 -90 -88 -86 -84 -82 -80 -78 -76 -74 -72 

LAT 

60 

58 

56 

54 

52 

50 

61192 61297 61379 61437 61469 61477 61459 61415 61346 61252 61133 60990 60822 60631 60418 60183 59928 59654 59362 

-18.2 -19.2 -20.2 -21.1 -22.0 -22.8 -23.6 -24.4 -25.1 -25.7 -26.3 -26.8 -27.2 -27.6 -27.9 -28.1 -28.3 -28.3 -28.3 

61139 61267 61369 61446 61496 61519 61514 61482 61422 61334 61220 61078 60909 60714 60495 60252 59985 59698 59390 

-22.7 -23.9 -25.0 -26.2 -27.2 -28.2 -29.2 -30.1 -30.9 -31.7 -32.4 -33.0 -33.6 -34.0 -34.4 -34.7 -34.9 -35.0 -35.0 

60958 61109 61233 61330 61399 61439 61450 61431 61382 61303 61195 61056 60889 60694 60470 60220 59945 59646 59325 

-27.5 -28.9 -30.3 -31.6 -32.8 -34.0 -35.1 -36.2 -37.2 -38.1 -38.9 -39.7 -40.4 -41.0 -41.5 -41.8 -42.1 -42.2 -42.2 

60645 60820 60967 61085 61174 61233 61260 61256 61221 61153 61053 60921 60757 60563 60338 60084 59802 59493 59160 

-32.6 -34.2 -35.8 -37.2 -38.7 -40.0 -41.3 -42.6 -43.7 -44.8 -45.9 -46.8 -47.6 -48.3 -48.9 -49.4 -49.7 -49.9 -49.9 

60202 60400 60570 60710 60820 60898 60944 60957 60936 60881 60791 60667 60510 60318 60094 59838 59551 59235 58893 

-37.8 -39.6 -41.4 -43.0 -44.7 -46.2 -47.7 -49.2 -50.5 -51.8 -53.0 -54.1 -55.1 -56.0 -56.7 -57.3 -57.7 -57.9 -57.9 

59632 59853 60046 60208 60339 60438 60503 60533 60528 60487 60410 60296 60145 59959 59737 59481 59192 58871 58520 

-43.0 -45.0 -47.0 -48.8 -50.6 -52.4 -54.1 -55.8 -57.3 -58.8 -60.2 -61.5 -62.7 -63.8 -64.7 -65.4 -65.9 -66.2 -66.3 

48 58941 59185 59399 59584 59736 59855 59939 59988 60000 59974 59910 59807 59666 59486 59269 59014 58724 58400 58044 

-48.1 -50.3 -52.4 -54.5 -56.5 -58.5 -60.4 -62.3 -64.1 -65.8 -67.4 -68.9 -70.3 -71.6 -72.7 -73.5 -74.2 -74.6 -74.7 

46 58139 58404 58639 58844 59017 59156 59259 59326 59355 59345 59296 59205 59074 58903 58691 58440 58151 57826 57466 

-52.9 -55.2 -57.5 -59.8 -62.0 -64.2 -66.4 -68.5 -70.5 -72.5 -74.4 -76.2 -77.8 -79.3 -80.5 -81.6 -82.4 -82.9 -83.2 

44 57236 57519 57774 57998 58190 58348 58470 58555 58602 58608 58572 58495 58375 58213 58008 57762 57476 57151 56789 

-57.3 -59.8 -62.3 -64.7 -67.1 -69.5 -71.9 -74.3 -76.6 -78.8 -81.0 -83.0 -84.9 -86.6 -88.1 -89.4 -90.4 -91.1 -91.4 

42 56243 56543 56814 57056 57265 57441 57581 57683 57746 57767 57747 57682 57574 57422 57226 56986 56704 56381 56020 

-61.2 -63.8 -66.5 -69.1 -71.7 -74.3 -76.9 -79.5 -82.1 -84.6 -87.0 -89.4 -91.5 -93.5 -95.3 -96.8 -98.0 -98.8 -99.3 

40 55172 55485 55771 56028 56253 56444 56600 56718 56796 56832 56826 56775 56679 56537 56350 56117 55841 55522 55163 

-64.5 -67.3 -70.0 -72.8 -75.6 -78.4 -81.2 -84.1 -86.9 -89.7 -92.4 -95.1 -97.5 -99.8-101.8-103.6-105.0-106.0-106.7 

38 54036 54359 54656 54925 55163 55368 55537 55669 55761 55812 55818 55780 55696 55565 55387 55163 54894 54580 54225 

-67.2 -70.0 -72.8 -75.7 -78.7 -81.7 -84.7 -87.8 -90.9 -94.0 -97.0-100.0-102.7-105.3-107.6-109.6-111.3-112.6-113.4 

36 52844 53174 53479 53757 54006 54222 54403 54547 54651 54714 54733 54707 54634 54514 54346 54132 53870 53564 53215 

-69.1 -72.0 -74.9 -77.9 -81.0 -84.1 -87.4 -90.7 -94.1 -97.4-100.7-104.0-107.0-109.9-112.5-114.8-116.7-118.2-119.3 

34 51608 51942 52252 52536 52792 53016 53206 53360 53474 53548 53578 53563 53501 53392 53235 53030 52778 52481 52139 

-70.3 -73.2 -76.1 -79.2 -82.4 -85.7 -89.1 -92.6 -96.2 -99.9-103.5-107.0-110.4-113.5-116.4-119.0-121.2-122.9-124.2 

32 50339 50673 50984 51271 51530 51760 51956 52118 52241 52323 52363 52358 52307 52209 52062 51868 51626 51338 51006 

-70.8 -73.6 -76.5 -79.6 -82.9 -86.3 -89.9 -93.6 -97.4-101.3-105.1-108.9-112.6-116.1-119.3-122.1-124.6-126.6-128.1 

30 49045 49375 49684 49971 50231 50463 50663 50829 50959 51049 51097 51101 51059 50971 50836 50653 50422 50145 49824 

-70.6 -73.2 -76.1 -79.2 -82.5 -86.0 -89.7 -93.6 -97.6-101.7-105.8-109.8-113.8-117.5-121.0-124.1-126.8-129.1-130.8 
"0 

co 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -72 -70 -68 -66 -64 -62 -60 -58 -56 -54 -52 -50 -48 -46 -44 -42 -40 -38 -36 

LAT 

60 59362 59054 58731 58396 58050 57695 57332 56964 56593 56221 55849 55479 55114 54753 54400 54056 53722 53398 53087 

-28.3 -28.2 -27.9 -27.6 -27.2 -26.6 -26.0 -25.3 -24.4 -23.5 -22.5 -21.4 -20.2 -19.0 -17.7 -16.4 -15.0 -13.5 -12.1 

58 59390 59065 58723 58366 57997 57618 57231 56838 56441 56042 55645 55249 54859 54475 54099 53733 53377 53035 52706 

-35.0 -34.8 -34.5 -34.1 -33.6 -33.0 -32.2 -31.3 -30.3 -29.2 -28.0 -26.7 -25.3 -23.8 -22.3 -20.7 -19.0 -17.3 -15.6 

56 59325 58983 58624 58247 57857 57456 57045 56628 56207 55784 55362 54943 54529 54123 53726 53339 52966 52606 52262 

-42.2 -42.0 -41.7 -41.2 -40.6 -39.9 -38.9 -37.9 -36.7 -35.3 -33.9 -32.3 -30.6 -28.9 -27.0 -25.1 -23.2 -21.2 -19.3 

54 59160 58805 58429 58035 57625 57203 56771 56331 55887 55441 54997 54555 54120 53694 53277 52874 52484 52109 51752 

-49.9 -49.7 -49.3 -48.8 -48.1 -47.2 -46.1 -44.8 -43.4 -41.8 -40.1 -38.2 -36.2 -34.1 -32.0 -29.7 -27.5 -25.2 -22.9 

52 58893 58525 58135 57725 57298 56857 56404 55944 55479 55012 54547 54085 53631 53186 52753 52334 51930 51544 51175 

-57.9 -57.8 -57.4 -56.8 -55.9 -54.9 -53.6 -52.2 -50.5 -48.6 -46.6 -44.4 -42.0 -39.6 -37.0 -34.4 -31.8 -29.1 -26.5 

50 58520 58143 57741 57317 56874 56416 55945 55466 54982 54496 54012 53533 53061 52601 52153 51721 51306 50909 50533 

-66.3 -66.1 -65.7 -65.0 -64.1 -62.9 -61.4 -59.7 -57.8 -55.6 -53.2 -50.7 -48.0 -45.2 -42.2 -39.2 -36.2 -33.1 -30.1 

48 58044 57659 57246 56810 56354 55881 55395 54899 54398 53896 53395 52900 52414 51939 51480 51037 50613 50209 49828 

-74.7 -74.6 -74.2 -73.4 -72.4 -71.1 -69.4 -67.5 -65.3 -62.8 -60.1 -57.2 -54.1 -50.8 -47.5 -44.0 -40.6 -37.1 -33.6 

46 57466 57074 56654 56209 55741 55255 54755 54246 53730 53213 52699 52190 51692 51206 50737 50286 49855 49447 49062 

-83.2 -83.1 -82.7 -81.9 -80.8 -79.3 -77.5 -75.3 -72.8 -70.0 -67.0 -63.7 -60.2 -56.5 -52.8 -48.9 -45.0 -41.1 -37.2 

44 56789 56394 55968 55515 55039 54543 54032 53510 52983 52454 51928 51408 50900 50406 49929 49473 49038 48628 48242 

-91.4 -91.4 -91.0 -90.2 -89.0 -87.4 -85.4 -83.1 -80.3 -77.2 -73.9 -70.2 -66.3 -62.2 -58.0 -53.7 -49.4 -45.0 -40.7 

42 56020 55623 55194 54735 54252 53748 53229 52698 52162 51623 51088 50561 50045 49545 49063 48604 48167 47757 47373 

-99.3 -99.4 -99.0 -98.2 -97.0 -95.3 -93.2 -90.6 -87.7 -84.3 -80.6 -76.6 -72.4 -67.9 -63.2 -58.5 -53.7 -48.9 -44.2 

40 55163 54766 54336 53875 53388 52879 52354 51817 51273 50728 50187 49654 49134 48630 48146 47685 47249 46840 46459 

-106.7-106.9-106.6-105.9-104.6-102.9-100.6 -97.9 -94.7 -91.2 -87.2 -82.9 -78.3 -73.4 -68.4 -63.2 -58.0 -52.8 -47.6 

38 54225 53832 53402 52941 52453 51942 51413 50873 50325 49776 49232 48696 48173 47668 47184 46723 46290 45884 45507 

-113.4-113.7-113.6-112.9-111.6-109.9-107.6-104.8-101.4 -97.6 -93.4 -88.8 -83.9 -78.7 -73.4 -67.8 -62.2 -56.6 -51.1 

36 53215 52826 52400 51941 51454 50943 50415 49873 49325 48775 48229 47693 47170 46666 46183 45726 45296 44895 44524 

-119.3-119.8-119.7-119.2-118.0-116.2-113.9-111.0-107.6-103.7 -99.3 -94.5 -89.3 -83.8 -78.1 -72.3 -66.3 -60.4 -54.4 

34 52139 51757 51336 50882 50399 49892 49366 48827 48280 47732 47188 46653 46133 45631 45152 44699 44274 43879 43515 

-124.2-124.9-125.0-124.6-123.5-121.8-119.5-116.6-113.2-109.2-104.6 -99.7 -94.3 -88.6 -82.7 -76.5 -70.3 -64.0 -57.7 

32 51006 50632 50220 49773 49297 48795 48275 47740 47198 46654 46114 45584 45068 44571 44097 43650 43231 42843 42486 

-128.1-129.0-129.3-129.0-128.1-126.5-124.3-121.5-118.0-114.0-109.4-104.4 -98.9 -93.0 -86.9 -80.5 -74.0 -67.5 -60.9 

30 49824 49460 49058 48621 48154 47661 47148 46621 46086 45549 45016 44492 43982 43492 43025 42584 42172 41791 41443 

-130.8-131.9-132.5-132.4-131.6-130.2-128.1-125.4-122.0-118.1-113.5-108.4-102.9 -96.9 -90.7 -84.2 -77.5 -70.7 -63.9 
-o 

-o 

LONG 

LAT 

60 

58 

56 

54 

IGRF 1980 TOTAL INTENSITY (F) 

-36 -34 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 

53087 52788 52504 52234 51979 51739 51516 51308 51118 50943 50786 50646 50522 50415 50324 50251 50193 50152 50127 

-12.1 -10.6 -9.1 -7.6 -6.1 -4.6 -3.0 -1.5 o.o 1.5 3.1 4.6 6.1 7.6 9.1 10.6 12.1 13.6 15.0 

52706 52391 52092 51809 51542 51292 51060 50845 50649 50470 50309 50165 50040 49932 49842 49770 49714 49676 49654 

-15.6 -13.9 -12.2 -10.5 -8.8 -7.1 -5.4 -3.7 -2.0 -0.3 1.3 2.9 4.6 6.2 7.7 9.3 10.9 12.4 14.0 

52262 51933 51622 51328 51052 50795 50556 50337 50136 49954 49792 49648 49524 49418 49330 49260 49208 49174 49157 

-19.3 -17.3 -15.3 -13.3 -11.4 -9.4 -7.5 -5.7 -3.8 -2.1 -0.3 1.5 3.2 4.9 6.5 8.2 9.8 11.4 13.0 

51752 51412 51091 50789 50506 50244 50001 49779 49577 49396 49234 49092 48970 48868 48784 48719 48673 48644 48634 

-22.9 -20.6 -18.3 -16.1 -13.9 -11.7 -9.6 -7.5 -5.5 -3.6 -1.7 0.2 2.0 3.8 5.6 7.3 9.0 10.6 12.3 

52 51175 50827 50498 50191 49904 49639 49395 49173 48972 48792 48634 48496 48378 48280 48203 48144 48105 48084 48080 

-26.5 -23.9 -21.3 -18.7 -16.2 -13.8 -11.4 -9.2 -7.0 -4.9 -2.8 -0.8 1.1 3.0 4.8 6.6 8.3 10.1 11.8 

50 50533 50178 49845 49534 49246 48981 48738 48518 48320 48144 47990 47858 47746 47655 47585 47534 47502 47490 47495 

-30.1 -27.1 -24.1 -21.2 -18.4 -15.7 -13.1 -10.7 -8.3 -6.0 -3.8 -1.7 0.4 2.3 4.3 6.1 7.9 9.7 11.5 

48 49828 49469 49134 48822 48535 48271 48032 47816 47623 47453 47305 47180 47076 46993 46930 46888 46865 46862 46877 

-33.6 -30.2 -26.9 -23.7 -20.6 -17.6 -14.7 -12.0 -9.4 -6.9 -4.5 -2.3 -0.1 1.9 3.9 5.9 7.7 9.6 11.4 

46 49062 48702 48367 48057 47773 47513 47279 47069 46882 46720 46580 46462 46367 46293 46239 46207 46193 46199 46224 

-37.2 -33.4 -29.6 -26.0 -22.6 -19.3 -16.1 -13.2 -10.3 -7.7 -5.1 -2.8 -0.5 1.7 3.8 5.8 7.7 9.6 11.4 

44 48242 47883 47550 47244 46964 46710 46482 46280 46101 45947 45816 45708 45621 45557 45513 45490 45486 45502 45537 

-40.7 -36.5 -32.3 -28.4 -24.5 -20.9 -17.5 -14.2 -11.2 -8.3 -5.7 -3.1 -0.7 1.5 3.7 5.8 7.8 9.7 11.6 

42 47373 47016 46687 46386 46113 45866 45646 45452 45282 45137 45016 44917 44841 44786 44752 44739 44745 44771 44815 

-44.2 -39.5 -35.0 -30.6 -26.5 -22.5 -18.8 -15.3 -12.0 -9.0 -6.1 -3.4 -0.9 1.5 3.7 5.9 7.9 9.9 11.9 

40 46459 46107 45783 45489 45223 44985 44773 44588 44429 44293 44182 44093 44027 43982 43959 43955 43972 44007 44061 

-47.6 -42.6 -37.7 -32.9 -28.4 -24.1 -20.1 -16.4 -12.8 -9.6 -6.6 -3.7 -1.1 1.4 3.7 6.0 8.1 10.2 12.2 

38 45507 45161 44844 44557 44300 44070 43869 43693 43544 43419 43317 43239 43183 43148 43134 43141 43167 43212 43275 

-51.1 -45.6 -40.3 -35.2 -30.4 -25.8 -21.5 -17.5 -13.7 -10.2 -7.0 -4.1 -1.3 1.3 3.7 6.0 8.2 10.3 12.4 

36 44524 44184 43875 43597 43348 43128 42936 42770 42631 42516 42425 42357 42311 42286 42282 42299 42334 42389 42461 

-54.4 -48.6 -43.0 -37.5 -32.4 -27.5 -22.9 -18.6 -14.6 -11.0 -7.6 -4.5 -1.6 1.1 3.6 6.0 8.3 10.4 12.5 

34 43515 43183 42882 42612 42372 42161 41979 41824 41694 41590 41509 41451 41415 41400 41406 41432 41477 41540 41621 

-57.7 -51.6 -45.6 -39.9 -34.4 -29.2 -24.3 -19.8 -15.6 -11.8 -8.2 -4.9 -1.9 0.9 3.5 5.9 8.2 10.4 12.5 

32 42486 42161 41869 41607 41377 41176 41004 40858 40739 40644 40574 40526 40500 40495 40511 40546 40600 40672 40761 

-60.9 -54.5 -48.2 -42.2 -36.4 -30.9 -25.8 -21.0 -16.6 -12.6 -8.9 -5.5 -2.3 0.5 3.2 5.7 8.1 10.3 12.4 

30 41443 41126 40842 40590 40369 40177 40014 39879 39770 39685 39625 39587 39571 39576 39601 39646 39709 39789 39886 

-63.9 -57.2 -50.7 -44.4 -38.3 -32.6 -27.3 -22.3 -17.7 -13.4 -9.6 -6.0 -2.8 0.2 2.9 5.5 7.8 10.1 12.2 
8 

LONG 

LAT 

30 

28 

26 

24 

22 

20 

18 

16 

14 

IGRF 1980 TOTAL INTENSITY (F) 

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 

39886 39999 40125 40264 40415 40576 40746 40924 41109 41299 41495 41694 41898 42105 42316 42530 42747 42968 43191 

12.2 14.3 16.3 18.2 19.9 21.6 23.2 24.6 25.8 26.8 27.5 28.0 28.3 28.2 27.9 27.4 26.6 25.6 24.3 

39006 39125 39258 39404 39559 39725 39898 40078 40265 40456 40652 40851 41054 41260 41468 41680 41895 42113 42334 

12.0 14.0 15.9 17.8 19.5 21.1 22.6 23.9 25.0 26.0 26.7 27.1 27.3 27.2 26.8 26.2 25.4 24.3 23.1 

38128 38255 38394 38545 38706 38875 39051 39233 39421 39612 39807 40005 40206 40410 40616 40824 41035 41249 41466 

11.7 13.7 15.5 17.3 18.9 20.4 21.8 23.0 24.1 24.9 25.5 25.8 25.9 25.7 25.3 24.6 23.8 22.7 21.4 

37263 37397 37543 37700 37865 38038 38216 38400 38588 38780 38974 39170 39368 39568 39770 39974 40180 40389 40601 

11.4 13.3 15.1 16.7 18.2 19.6 20.9 21.9 22.8 23.5 23.9 24.1 24.1 23.8 23.3 22.6 21.6 20.5 19.2 

36423 36565 36717 36879 37049 37225 37407 37592 37781 37971 38164 38357 38551 38747 38944 39142 39343 39545 39750 

11.3 13.1 14.7 16.2 17.5 18.7 19.8 20.6 21.3 21.8 22.1 22.1 21.9 21.5 20.8 20.0 19.0 17.8 16.6 

35620 35770 35929 36096 36271 36451 36635 36822 37011 37201 37391 37581 37771 37962 38153 38344 38537 38731 38927 

11.4 13.0 14.5 15.8 16.9 17.9 18.7 19.3 19.7 19.9 19.9 19.7 19.3 18.7 17.9 17.0 15.9 14.7 13.4 

34866 35024 35190 35363 35543 35727 35914 36103 36292 36481 36669 36856 37042 37226 37409 37593 37776 37961 38147 

11.7 13.2 14.4 15.5 16.4 17.0 17.5 17.9 18.0 17.9 17.6 17.1 16.5 15.6 14.7 13.5 12.3 11.0 9.7 

34172 34337 34511 34692 34877 35065 35256 35446 35637 35825 36011 36194 36375 36552 36728 36901 37074 37248 37423 

12.3 13.5 14.6 15.4 16.0 16.3 16.5 16.4 16.2 15.8 15.1 14.3 13.3 12.2 11.0 9.7 8.3 6.9 5.5 

33545 33721 33903 34090 34282 34476 34670 34864 35055 35243 35427 35607 35782 35952 36118 36281 36443 36603 36765 

13.1 14.1 14.9 15.4 15.7 15.7 15.5 15.1 14.4 13.5 12.5 11.3 10.0 8.5 7.0 5.5 3.9 2.4 0.9 

12 32993 33179 33371 33567 33765 33965 34165 34362 34555 34743 34926 35102 35270 35433 35589 35741 35889 36036 36182 

14.1 14.9 15.4 15.7 15.6 15.2 14.6 13.7 12.6 11.3 9.8 8.1 6.4 4.6 2.8 1.0 -0.8 -2.5 -4.1 

10 32519 32716 32918 33123 33330 33538 33743 33944 34140 34329 34510 34682 34845 34999 35145 35284 35418 35550 35681 

15.1 15.8 16.0 16.0 15.5 14.8 13.7 12.3 10.7 8.9 6.9 4.8 2.6 0.4 -1.8 -3.9 -5.9 -7.8 -9.5 

8 32120 32330 32544 32760 32977 33192 33404 33610 33810 34000 34179 34348 34504 34650 34784 34910 35030 35146 35260 

16.2 16.6 16.6 16.2 15.4 14.3 12.7 10.9 8.8 6.4 3.9 1.3 -1.4 -4.0 -6.6 -9.1 -11.4 -13.4 -15.3 

6 31793 32017 32244 32472 32699 32923 33143 33355 33558 33750 33928 34093 34243 34379 34503 34615 34720 34819 34917 

17.0 17.2 17.0 16.3 15.2 13.6 11.6 9.3 6.6 3.7 0.7 -2.5 -5.7 -8.8 -11.8 -14.5 -17.1 -19.4 -21.4 

4 31530 31769 32009 32250 32488 32723 32950 33169 33376 33569 33746 33907 34050 34177 34289 34388 34478 34561 34643 

17.4 17.5 17.0 16.1 14.6 12.6 10.2 7.4 4.2 0.8 -2.8 -6.5 -10.2 -13.8 -17.2 -20.3 -23.1 -25.6 -27.7 

2 31319 31573 31828 32082 32333 32577 32813 33038 33249 33443 33619 33776 33912 34030 34130 34215 34290 34358 34425 

17.3 17.2 16.6 15.4 13.6 11.2 8.4 5.1 1.4 -2.6 -6.7 -10.9 -15.1 -19.1 -22.9 -26.4 -29.5 -32.1 -34.3 

0 31148 31419 31688 31955 32218 32472 32716 32947 33161 33356 33530 33681 33811 33919 34007 34080 34140 34194 34248 

16.6 16.4 15.6 14.1 12.0 9.3 6.0 2.3 -1.9 -6.3 -11.0 -15.7 -20.3 -24.8 -29.0 -32.7 -36.0 -38.8 -41.1 
~ 

LONG 

LAT 

30 

28 

26 

24 

22 

20 

IGRF 1980 TOTAL INTENSITY {F) 

36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 

43191 43418 43648 43881 44117 44355 44596 44838 45083 45328 45574 45820 46066 46311 46554 46795 47033 47267 47497 

24.3 22.9 21.4 19.8 18.1 16.4 14.6 12.9 11.1 9.5 7.8 6.2 4.7 3.2 1.8 0.5 -0.7 -1.8 -2.8 

42334 42557 42784 43014 43246 43480 43716 43953 44191 44429 44667 44905 45140 45374 45606 45834 46058 46278 46493 

23.1 21.7 20.2 18.6 17.0 15.3 13.6 12.0 10.3 8.8 7.2 5.7 4.3 2.9 1.6 0.4 -0.7 -1.7 -2.6 

41466 41686 41909 42134 42361 42591 42821 43053 43285 43517 43748 43977 44205 44429 44650 44868 45081 45288 45490 

21.4 20.0 18.6 17.0 15.4 13.8 12.3 10.7 9.2 7.7 6.3 5.0 3.7 2.4 1.3 0.2 -0.9 -1.8 -2.6 

40601 40815 41032 41252 41474 41698 41923 42150 42376 42602 42827 43049 43270 43487 43700 43909 44113 44311 44504 

19.2 17.9 16.4 14.9 13.4 11.9 10.5 9.0 7.6 6.3 5.1 3.9 2.7 1.6 0.6 -0.4 -1.3 -2.1 -2.8 

39750 39957 40168 40381 40596 40814 41033 41254 41475 41695 41915 42132 42348 42559 42767 42971 43169 43362 43548 

16.6 15.2 13.8 12.4 10.9 9.5 8.2 6.9 5.6 4.5 3.4 2.3 1.3 0.4 -0.5 -1.3 -2.1 -2.7 -3.3 

38927 39127 39329 39534 39741 39952 40165 40379 40595 40811 41026 41240 41452 41661 41867 42068 42264 42454 42638 

13.4 12.0 10.6 9.3 7.9 6.6 5.4 4.2 3.1 2.1 1.2 0.3 -0.5 -1.3 -2.0 -2.7 -3.3 -3.8 -4.2 

18 38147 38336 38528 38724 38923 39125 39331 39539 39750 39962 40174 40387 40598 40807 41013 41216 41414 41606 41792 

9.7 8.3 7.0 5.6 4.4 3.2 2.1 1.0 0.1 -0.8 -1.5 -2.3 -2.9 -3.5 -4.0 -4.5 -4.9 -5.3 -5.5 

16 37423 37600 37780 37965 38153 38347 38545 38747 38953 39162 39374 39586 39799 40012 40222 40430 40633 40832 41024 

5.5 4.1 2.8 1.5 0.3 -0.8 -1.8 -2.7 -3.4 -4.2 -4.8 -5.3 -5.8 -6.2 -6.6 -6.9 -7.1 -7.2 -7.2 

14 36765 36929 37096 37268 37445 37629 37819 38015 38218 38425 38637 38853 39070 39289 39507 39724 39938 40147 40351 

0.9 -0.5 -1.8 -3.1 -4.2 -5.2 -6.1 -6.8 -7.5 -8.0 -8.5 -8.9 -9.2 -9.4 -9.6 -9.7 -9.7 -9.6 -9.4 

12 36182 36331 36484 36643 36809 36982 37164 37355 37554 37762 37976 38197 38422 38651 38881 39111 39339 39564 39784 

-4.1 -5.6 -6.9 -8.1 -9.2 -10.1 -10.8 -11.5 -12.0 -12.4 -12.7 -12.9 -13.0 -13.1 -13.1 -13.0 -12.7 -12.4 -11.9 

10 35681 35814 35952 36096 36249 36413 36587 36774 36972 37181 37400 37629 37865 38106 38352 38600 38847 39092 39332 

-9.5 -11.1 -12.4 -13.6 -14.5 -15.3 -16.0 -16.5 -16.8 -17.1 -17.2 -17.3 -17.2 -17.1 -16.9 -16.5 -16.1 -15.5 -14.8 

8 35260 35377 35499 35630 35771 35924 36092 36276 36474 36687 36914 37153 37404 37663 37928 38197 38468 38737 39002 

-15.3 -16.9 -18.2 -19.4 -20.3 -20.9 -21.4 -21.8 -22.0 -22.0 -22.0 -21.9 -21.6 -21.3 -20.9 -20.3 -19.6 -18.8 -17.8 

6 34917 35018 35124 35241 35371 35516 35679 35861 36062 36282 36520 36773 37042 37321 37610 37905 38203 38501 38795 

-21.4 -23.0 -24.4 -25.5 -26.3 -26.8 -27.2 -27.3 -27.3 -27.2 -26.9 -26.6 -26.2 -25.6 -24.9 -24.1 -23.2 -22.1 -20.7 

4 34643 34728 34820 34924 35044 35183 35344 35527 35733 35963 36215 36486 36776 37080 37396 37721 38050 38379 38707 

-27.7 -29.4 -30.8 -31.8 -32.5 -32.9 -33.0 -32.9 -32.7 -32.4 -31.9 -31.3 -30.6 -29.8 -28.9 -27.8 -26.6 -25.2 -23.5 

2 34425 34495 34575 34669 34782 34917 35077 35265 35480 35723 35992 36286 36600 36933 37280 37638 38001 38367 38730 

-34.3 -36.1 -37.4 -38.3 -38.8 -39.0 -38.9 -38.6 -38.1 -37.4 -36.7 -35.8 -34.8 -33.8 -32.6 -31.2 -29.7 -28.0 -26.0 

0 34248 34306 34375 34461 34570 34705 34869 35065 35293 35553 35844 36163 36506 36871 37252 37646 38048 38452 38854 

-41.1 -42.8 -44.1 -44.8 -45.1 -45.0 -44.6 -44.0 -43.2 -42.2 -41.1 -40.0 -38.7 -37.3 -35.8 -34.2 -32.3 -30.3 -28.0 
0 

!'..) 

LONG 

LAT 

30 

28 

26 

24 

22 

20 

18 

16 

14 

IGRF 1980 TOTAL INTENSITY (F) 

72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 10 2 104 106 108 

47497 47721 47939 48149 48351 48541 48720 48886 49035 49167 49280 49371 49437 49478 49489 49470 49418 49331 49209 

-2.8 -3.6 -4.2 -4.6 -4.9 -4.8 -4.5 -4.0 -3.2 -2.2 -0.9 0.6 2.3 4.1 5.9 7.9 9.8 11.7 13.4 

46493 46701 46903 47098 47283 47458 47622 47772 47908 48027 48128 48208 48266 48299 48305 48281 48227 48140 48018 

-2.6 -3.4 -4.0 -4.4 -4.5 -4.5 -4.1 -3.6 -2.7 -1.6 -0.3 1.3 3.0 4.8 6.7 8.7 10.7 12.6 14.4 

45490 45686 45875 46055 46227 46389 46539 46677 46800 46908 46999 47070 47120 47146 47147 47120 47064 46977 46858 

-2.6 -3.3 -3.8 -4.1 -4.2 -4.1 -3.7 -3.1 -2.2 -1.1 0.3 1.9 3.7 5.5 7.5 9.5 11.5 13.4 15.2 

44504 44689 44868 45038 45199 45350 45490 45617 45731 45830 45911 45975 46018 46038 46035 46006 45948 45862 45745 

-2.8 -3.4 -3.8 -4.0 -4.0 -3.8 -3.4 -2.7 -1.7 -0.5 0.9 2.5 4.3 6.3 8.2 10.3 12.2 14.1 15.9 

43548 43727 43898 44061 44215 44359 44491 44612 44718 44810 44885 44942 44979 44996 44989 44957 44900 44814 44700 

-3.3 -3.7 -4.0 -4.1 -4.1 -3.7 -3.2 -2.4 -1.4 -0.1 1.4 3.1 4.9 6.9 8.9 10.9 12.9 14.8 16.5 

42638 42815 42984 43144 43295 43435 43563 43679 43781 43868 43939 43992 44025 44038 44028 43995 43937 43853 43741 

-4.2 -4.5 -4.6 -4.6 -4.3 -3.9 -3.2 -2.3 -1.1 0.3 1.8 3.6 5.5 7.5 9.5 11.5 13.5 15.3 17.0 

41792 41970 42141 42303 42454 42595 42723 42838 42939 43025 43093 43143 43174 43185 43173 43139 43081 42998 42889 

-5.5 -5.6 -5.5 -5.3 -4.9 -4.2 -3.4 -2.3 -1.0 0.5 2.2 4.0 6.0 8.0 10.0 12.1 14.0 15.8 17.5 

41024 41210 41387 41554 41711 41856 41989 42107 42210 42296 42365 42415 42445 42454 42441 42406 42348 42266 42160 

-7.2 -7.1 -6.8 -6.4 -5.8 -4.9 -3.8 -2.6 -1.1 0.6 2.4 4.3 6.4 8.4 10.5 12.6 14.5 16.3 17.9 

40351 40547 40735 40914 41081 41235 41375 41500 41608 41698 41770 41821 41852 41861 41848 41813 41755 41674 41570 

-9.4 -9.0 -8.5 -7.8 -6.9 -5.8 -4.5 -3.0 -1.3 0.5 2.5 4.6 6.7 8.9 11.0 13.1 15.0 16.8 18.4 

12 39784 39996 40200 40394 40575 40743 40895 41030 41146 41244 41320 41375 41408 41419 41407 41372 41314 41234 41131 

-11.9 -11.3 -10.5 -9.5 -8.3 -7.0 -5.4 -3.6 -1.7 0.4 2.6 4.9 7.1 9.4 11.6 13.7 15.6 17.4 19.0 

10 39332 39566 39790 40003 40204 40388 40556 40705 40834 40941 41025 41086 41123 41136 41125 41091 41034 40955 40854 

-14.8 -13.9 -12.8 -11.4 -9.9 -8.2 -6.3 -4.2 -2.0 0.3 2.7 5.2 7.6 10.0 12.2 14.4 16.3 18.1 19.6 

8 39002 39261 39510 39747 39970 40176 40363 40530 40673 40793 40887 40956 40999 41017 41009 40976 40920 40842 40744 

-17.8 -16.5 -15.1 -13.5 -11.6 -9.5 -7.3 -4.9 -2.3 0.3 2.9 5.6 8.2 10.7 13.1 15.3 17.3 19.0 20.5 

6 38795 39082 39360 39626 39875 40106 40316 40503 40664 40799 40906 40986 41037 41060 41056 41027 40973 40897 40800 

-20.7 -19.2 -17.4 -15.4 -13.2 -10.8 -8.1 -5.4 -2.5 0.4 3.3 6.2 9.0 11.6 14.1 16.4 18.4 20.2 21.7 

4 38707 39027 39337 39634 39913 40172 40408 40618 40801 40954 41077 41169 41230 41261 41263 41238 41188 41114 41020 

-23.5 -21.7 -19.5 -17.2 -14.6 -11.8 -8.8 -5.7 -2.5 0.7 3.9 7.0 10.0 12.8 15.4 17.7 19.8 21.6 23.1 

2 38730 39086 39432 39763 40075 40366 40630 40867 41073 41247 41388 41496 41569 41611 41621 41602 41557 41488 41398 

-26.0 -23.8 -21.3 -18.6 -15.7 -12.5 -9.2 -5.8 -2.3 1.3 4.7 8.1 11.2 14.2 16.9 19.3 21.4 23.2 24.7 

0 38854 39249 39633 40001 40349 40673 40970 41236 41468 41666 41828 41953 42042 42096 42117 42107 42069 42006 41921 

-28.0 -25.5 -22.7 -19.6 -16.4 -12.9 -9.2 -5.5 -1.7 2.1 5.8 9.4 12.7 15.9 18.7 21.2 23.3 25.1 26.6 
0 

(,.) 

LONG 

LAT 

30 

28 

26 

24 

22 

20 

IGRF 1980 TOTAL INTENSITY (F) 

108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 14 2 144 

49209 49048 48850 48613 48337 48023 47673 47287 46869 46421 45946 45449 44932 44401 43859 43312 42765 42222 41688 

13.4 15.1 16.6 17.9 19.0 19.9 20.7 21.2 21.6 21.8 21.9 22.0 21.9 21.8 21.7 21.5 21.3 21.1 20.8 

48018 47861 47668 47437 47169 46865 46526 46152 45748 45314 44855 44373 43874 43360 42837 42308 41780 41255 40740 

14.4 16.0 17.5 18.8 19.9 20.7 21.4 21.9 22.2 22.3 22.4 22.3 22.2 22.1 21.9 21.7 21.4 21.2 20.9 

46858 46704 46516 46293 46035 45741 45415 45056 44666 44250 43808 43346 42866 42372 41870 41363 40855 40352 39858 

15.2 16.8 18.3 19.5 20.6 21.4 21.9 22.3 22.5 22.6 22.6 22.4 22.3 22.0 21.8 21.6 21.3 21.0 20.7 

45745 45596 45414 45199 44951 44670 44357 44013 43641 43243 42821 42380 41922 41451 40971 40488 40004 39524 39053 

15.9 17.5 18.9 20.1 21.1 21.8 22.3 22.6 22.8 22.7 22.6 22.4 22.1 21.8 21.5 21.3 21.0 20.6 20.3 

44700 44555 44380 44174 43936 43668 43369 43043 42689 42311 41911 41492 41057 40610 40156 39697 39238 38783 38337 

16.5 18.1 19.4 20.6 21.5 22.1 22.6 22.8 22.8 22.7 22.5 22.2 21.9 21.5 21.2 20.8 20.5 20.1 19.8 

43741 43601 43433 43235 43009 42753 42470 42161 41826 41469 41091 40696 40286 39865 39436 39003 38571 38141 37720 

17.0 18.6 19.9 20.9 21.8 22.3 22.7 22.8 22.8 22.6 22.4 22.0 21.6 21.2 20.8 20.4 20.0 19.6 19.2 

18 42889 42753 42591 42402 42187 41944 41677 41385 41070 40734 40379 40008 39623 39228 38826 38419 38013 37610 37213 

17.5 19.0 20.2 21.2 22.0 22.5 22.8 22.9 22.8 22.6 22.2 21.8 21.3 20.9 20.4 20.0 19.5 19.1 18.6 

16 42160 42028 41872 41692 41486 41257 41005 40730 40434 40120 39788 39441 39082 38713 38337 37957 37576 37199 36827 

17.9 19.4 20.6 21.5 22.2 22.7 22.9 22.9 22.8 22.5 22.1 21.7 21.2 20.7 20.1 19.6 19.1 18.6 18.1 

14 41570 41442 41292 41119 40923 40706 40468 40211 39934 39641 39331 39008 38674 38331 37980 37626 37271 36917 36569 

18.4 19.8 20.9 21.8 22.5 22.9 23.1 23.1 22.9 22.6 22.1 21.7 21.1 20.5 20.0 19.4 18.8 18.3 17.7 

12 41131 41007 40862 40696 40510 40304 40080 39839 39581 39307 39020 38720 38410 38091 37766 37436 37105 36774 36447 

19.0 20.3 21.4 22.2 22.8 23.2 23.3 23.3 23.1 22.7 22.3 21.8 21.2 20.6 20.0 19.3 18.7 18.0 17.3 

10 40854 40733 40592 40433 40255 40060 39849 39623 39383 39129 38862 38584 38297 38001 37699 37392 37083 36774 36467 

19.6 20.9 22.0 22.8 23.3 23.7 23.8 23.7 23.5 23.1 22.6 22.0 21.4 20.8 20.1 19.4 18.6 17.9 17.1 

8 40744 40625 40488 40334 40165 39980 39781 39570 39345 39109 38862 38606 38340 38066 37785 37500 37211 36920 36631 

20.5 21.8 22.8 23.6 24.1 24.3 24.4 24.3 24.0 23.6 23.1 22.5 21.8 21.1 20.3 19.5 18.7 17.8 16.9 

6 40800 40684 40551 40403 40241 40065 39878 39680 39471 39252 39023 38785 38539 38285 38025 37758 37488 37214 36940 

21.7 22.9 23.9 24.6 25.0 25.2 25.2 25.0 24.7 24.3 23.7 23.0 22.3 21.5 20.6 19.7 18.7 17.7 16.7 

4 41020 40908 40779 40636 40481 40314 40138 39952 39757 39554 39342 39122 38894 38659 38416 38167 37912 37654 37393 

23.1 24.3 25.2 25.8 26.2 26.3 26.2 26.0 25.6 25.0 24.4 23.6 22.8 21.9 20.9 19.9 18.8 17.6 16.4 

2 41398 41289 41165 41028 40880 40722 40555 40381 40200 40011 39815 39611 39400 39181 38954 38720 38480 38234 37985 

24.7 25.9 26.7 27.3 27.6 27.6 27.4 27.1 26.6 25.9 25.2 24.3 23.3 22.3 21.2 20.0 18.7 17.4 16.1 

0 41921 41818 41700 41569 41428 41279 41122 40960 40790 40615 40433 40245 40048 39844 39632 39411 39183 38949 38708 

26.6 27.7 28.5 28.9 29.1 29.1 28.8 28.3 27.7 26.9 25.9 24.9 23.8 22.6 21.3 20.0 18.6 17.1 15.6 
~ 

LONG 

LAT 

30 

28 

26 

24 

22 

20 

18 

16 

14 

IGRF 1980 TOTAL INTENSITY (F) 

144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 176 178 180 

41688 41167 40664 40183 39727 39300 38904 38543 38217 37929 37680 37469 37297 37163 37066 37006 36980 36987 37026 

20.8 20.3 19.8 19.1 18.3 17.2 15.9 14.4 12.6 10.7 8.5 6.1 3.7 1.1 -1.4 -3.9 -6.2 -8.3 -10.2 

40740 40238 39753 39290 38852 38443 38064 37719 37409 37136 36901 36704 36544 36422 36335 36283 36265 36277 36318 

20.9 20.5 19.9 19.3 18.5 17.4 16.1 14.6 12.9 10.9 8.7 6.3 3.7 1.1 -1.5 -4.0 -6.4 -8.7 -10.7 

39858 39377 38913 38470 38051 37661 37300 36972 36679 36421 36200 36016 35869 35757 35680 35635 35623 35639 35682 

20.7 20.3 19.8 19.1 18.3 17.3 16.1 14.6 12.8 10.9 8.6 6.2 3.7 1.0 -1.6 -4.2 -6.7 -9.0 -11.0 

39053 38595 38153 37731 37333 36962 36620 36310 36032 35790 35583 35411 35274 35172 35103 35065 35057 35075 35119 

20.3 19.9 19.4 18.8 18.0 17.0 15.8 14.3 12.6 10.6 8.5 6.1 3.5 0.9 -1.8 -4.4 -6.9 -9.3 -11.4 

38337 37902 37483 37084 36706 36355 36031 35738 35477 35248 35054 34893 34766 34671 34608 34574 34568 34587 34629 

19.8 19.4 18.9 18.2 17.5 16.5 15.3 13.9 12.2 10.3 8.1 5.8 3.2 0.6 -2.0 -4.6 -7.1 -9.5 -11.6 

37720 37309 36914 36536 36180 35847 35542 35264 35017 34802 34618 34466 34346 34257 34198 34166 34160 34177 34215 

19.2 18.7 18.2 17.6 16.8 15.8 14.7 13.3 11.6 9.8 7.6 5.3 2.9 0.3 -2.3 -4.9 -7.4 -9.7 -11.8 

37213 36827 36454 36098 35761 35447 35158 34895 34661 34456 34281 34136 34021 33934 33876 33843 33834 33846 33877 

18.6 18.1 17.6 16.9 16.1 15.1 14.0 12.6 11.0 9.1 7.1 4.8 2.4 -0.1 -2.6 -5.1 -7.6 -9.9 -12.0 

36827 36463 36113 35777 35459 35162 34887 34637 34413 34216 34047 33906 33793 33706 33645 33608 33592 33596 33617 

18.1 17.5 16.9 16.2 15.4 14.4 13.2 11.8 10.2 8.4 6.4 4.2 1.9 -0.5 -3.0 -5.4 -7.8 -10.1 -12.2 

36569 36228 35897 35580 35279 34996 34734 34494 34278 34087 33921 33781 33666 33576 33509 33464 33439 33432 33439 

17.7 17.0 16.3 15.5 14.6 13.6 12.4 11.0 9.4 7.6 5.7 3.6 1.3 -1.0 -3.4 -5.8 -8.1 -10.4 -12.4 

12 36447 36126 35814 35514 35228 34957 34705 34473 34262 34073 33908 33765 33646 33549 33473 33416 33378 33355 33347 

17.3 16.6 15.8 14.9 13.9 12.8 11.6 10.2 8.6 6.8 4.9 2.8 0.6 -1.6 -3.9 -6.3 -8.5 -10.7 -12.7 

10 36467 36164 35869 35583 35308 35048 34803 34576 34367 34179 34010 33862 33735 33627 33539 33468 33413 33372 33343 

17.1 16.2 15.3 14.3 13.3 12.1 10.8 9.3 7.7 5.9 4.0 2.0 -0.1 -2.3 -4.5 -6.8 -9.0 -11.1 -13.1 

8 36631 36344 36063 35789 35524 35271 35031 34806 34597 34405 34231 34075 33936 33815 33711 33622 33547 33485 33434 

16.9 15.9 14.9 13.8 12.6 11.3 9.9 8.4 6.8 5.0 3.2 1.2 -0.9 -3.0 -5.2 -7.4 -9.5 -11.6 -13.5 

6 36940 36668 36398 36133 35876 35628 35390 35165 34953 34755 34572 34405 34253 34115 33993 33883 33786 33699 33623 

16.7 15.6 14.4 13.2 11.9 10.5 9.0 7.5 5.8 4.1 2.2 0.3 -1.8 -3.8 -5.9 -8.0 -10.1 -12.2 -14.1 

4 37393 37132 36871 36614 36362 36116 35878 35650 35433 35227 35034 34853 34685 34529 34385 34253 34131 34018 33914 

16.4 15.2 13.9 12.5 11.1 9.6 8.1 6.5 4.8 3.0 1.2 -0.7 -2.7 -4.7 -6.8 -8.8 -10.9 -12.9 -14.8 

2 37985 37733 37480 37227 36978 36733 36493 36260 36036 35820 35614 35418 35232 35056 34890 34732 34584 34443 34309 

16.1 14.7 13.3 11.8 10.2 8.7 7.1 5.4 3.7 1.9 0.1 -1.8 -3.7 -5.7 -7.7 -9.7 -11.7 -13.7 -15.6 

0 38708 38464 38216 37967 37719 37472 37229 36990 36756 36530 36310 36097 35892 35694 35504 35321 35145 34975 34811 

15.6 14.0 12.5 10.9 9.2 7.6 5.9 4.2 2.5 0.7 -1.1 -2.9 -4.8 -6.7 -8.7 -10.7 -12.6 -14.6 -16.6 
0 

01 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 180 -178 -176 -174 -172 -170 -168 -166 -164 -162 -160 -158 -156 -154 -152 -150 -148 -146 -144 

LAT 

30 37026 37093 37189 37310 37456 37625 37816 38029 38262 38516 38789 39082 39393 39723 40069 40432 40809 41200 41603 

-10.2 -11.8 -13.1 -14.0 -14.7 -15.0 -15.2 -15.1 -15.0 -14.8 -14.6 -14.6 -14.8 -15.3 -16.0 -17.1 -18.6 -20.3 -22.5 

28 36318 36387 36481 36598 36738 36898 37078 37277 37495 37731 37985 38257 38547 38853 39176 39515 39868 40235 40613 

-10.7 -12.4 -13.7 -14.8 -15.5 -16.0 -16.2 -16.2 -16.1 -16.0 -16.0 -16.1 -16.3 -16.9 -17.7 -18.9 -20.4 -22.3 -24.4 

26 35682 35751 35842 35954 36086 36236 36404 36588 36788 37005 37239 37488 37754 38035 38333 38646 38973 39313 39666 

-11.0 -12.8 -14.3 -15.4 -16.2 -16.8 -17.1 -17.2 -17.2 -17.2 -17.3 -17.4 -17.8 -18.4 -19.4 -20.7 -22.3 -24.2 -26.4 

24 35119 35185 35272 35378 35501 35639 35793 35960 36143 36339 36550 36775 37016 37271 37542 37827 38126 38438 38763 

-11.4 -13.2 -14.7 -15.9 -16.8 -17.4 -17.8 -18.1 -18.2 -18.3 -18.5 -18.7 -19.2 -20.0 -21.1 -22.4 -24.1 -26.1 -28.4 

22 34629 34692 34773 34870 34982 35107 35245 35395 35557 35731 35918 36119 36333 36560 36803 37059 37328 37611 37906 

-11.6 -13.5 -15.0 -16.3 -17.3 -18.0 -18.5 -18.8 -19.1 -19.3 -19.6 -20.0 -20.7 -21.5 -22.7 -24.2 -26.0 -28.0 -30.3 

20 34215 34271 34344 34430 34529 34640 34760 34891 35032 35183 35345 35519 35705 35904 36117 36343 36582 36834 37097 

-11.8 -13.7 -15.3 -16.6 -17.7 -18.5 -19.1 -19.5 -19.9 -20.2 -20.7 -21.2 -22.0 -23.0 -24.3 -25.9 -27.8 -29.9 -32.2 

18 33877 33924 33986 34060 34144 34237 34339 34449 34567 34694 34830 34977 35135 35304 35487 35681 35889 36109 36340 

-12.0 -13.9 -15.5 -16.9 -18.0 -18.9 -19.6 -20.1 -20.6 -21.1 -21.7 -22.5 -23.4 -24.5 -25.9 -27.6 -29.6 -31.7 -34.0 

16 33617 33653 33701 33759 33826 33901 33982 34070 34164 34266 34375 34494 34622 34762 34913 35076 35251 35438 35636 

-12.2 -14.1 -15.7 -17.1 -18.3 -19.3 -20.1 -20.7 -21.4 -22.0 -22.8 -23.6 -24.7 -26.0 -27.5 -29.3 -31.3 -33.4 -35.7 

14 33439 33460 33492 33532 33580 33633 33692 33756 33825 33901 33983 34073 34172 34281 34400 34531 34673 34826 34990 

-12.4 -14.3 -15.9 -17.4 -18.6 -19.7 -20.6 -21.4 -22.2 -22.9 -23.8 -24.8 -26.0 -27.4 -29.0 -30.9 -32.9 -35.0 -37.3 

12 33347 33349 33362 33381 33407 33438 33473 33511 33555 33603 33657 33717 33786 33864 33952 34050 34159 34278 34408 

-12.7 -14.5 -16.2 -17.7 -19.0 -20.1 -21.1 -22.1 -23.0 -23.9 -24.9 -26.0 -27.3 -28.8 -30.5 -32.4 -34.4 -36.5 -38.7 

10 33343 33325 33315 33311 33313 33319 33328 33340 33356 33376 33401 33432 33471 33518 33573 33639 33714 33799 33894 

-13.1 -14.9 -16.6 -18.1 -19.5 -20.7 -21.8 -22.8 -23.9 -24.9 -26.0 -27.3 -28.7 -30.2 -31.9 -33.8 -35.8 -37.9 -40.0 

8 33434 33391 33357 33327 33303 33281 33263 33248 33235 33227 33223 33224 33232 33247 33271 33303 33345 33396 33456 

-13.5 -15.4 -17.1 -18.6 -20.0 -21.3 -22.6 -23.7 -24.8 -26.0 -27.2 -28.5 -30.0 -31.5 -33.3 -35.1 -37.0 -39.0 -41.0 

6 33623 33554 33492 33434 33381 33332 33285 33240 33199 33161 33127 33098 33075 33059 33051 33050 33059 33075 33100 

-14.1 -15.9 -17.7 -19.3 -20.8 -22.2 -23.5 -24.7 -25.9 -27.2 -28.5 -29.8 -31.3 -32.9 -34.5 -36.3 -38.1 -40.0 -41.8 

4 33914 33816 33725 33638 33555 33475 33398 33324 33253 33185 33121 33061 33008 32960 32920 32886 32861 32843 32834 

-14.8 -16.7 -18.4 -20.1 -21.6 -23.1 -24.5 -25.8 -27.2 -28.5 -29.8 -31.2 -32.6 -34.2 -35.8 -37.4 -39.1 -40.8 -42.5 

2 34309 34182 34059 33941 33827 33716 33609 33504 33402 33304 33209 33119 33035 32956 32883 32818 32759 32707 32663 

-15.6 -17.5 -19.3 -21.0 -22.6 -24.2 -25.7 -27.1 -28.5 -29.8 -31.2 -32.6 -34.0 -35.4 -36.9 -38.4 -39.9 -41.5 -42.9 

0 34811 34652 34498 34348 34202 34059 33920 33784 33651 33522 33397 33277 33162 33051 32947 32849 32757 32671 32592 

-16.6 -18.5 -20.3 -22.1 -23.8 -25.4 -27.0 -28.4 -29.9 -31.3 -32.6 -34.0 -35.3 -36.6 -38.0 -39.3 -40.7 -42.0 -43.3 
~ 

IGRF 1980 TOTAL !~TENSITY (F) 

LONG -144 -142 -140 -138 -136 -134 -132 -130 -128 -126 -124 -122 -120 -118 -116 -114 -112 -110 -108 

LAT 

30 

28 

26 

24 

22 

20 

18 

16 

14 

41603 42016 42437 42865 43298 43734 44172 44609 45046 45479 45909 46333 46751 47161 47563 47953 48332 48696 49045 

-22.5 -24.9 -27.5 -30.3 -33.3 -36.4 -39.4 -42.5 -45.4 -48.3 -51.0 -53.6 -56.1 -58.5 -60.9 -63.2 -65.6 -68.0 -70.6 

40613 41002 41400 41805 42216 42630 43046 43462 43878 44293 44704 45110 45512 45907 46294 46672 47039 47394 47734 

-24.4 -26.9 -29.5 -32.3 -35.3 -38.2 -41.2 -44.1 -46.8 -49.5 -52.0 -54.3 -56.6 -58.7 -60.8 -62.9 -65.0 -67.3 -69.6 

39666 40029 40401 40780 41166 41555 41947 42340 42733 43125 43514 43901 44283 44659 45029 45391 45744 46085 46414 

-26.4 -28.8 -31.5 -34.3 -37.1 -40.0 -42.8 -45.5 -48.1 -50.4 -52.7 -54.7 -56.7 -58.5 -60.3 -62.1 -63.9 -65.9 -68.1 

38763 39098 39442 39794 40151 40514 40879 41246 41614 41981 42346 42709 43069 43424 43774 44118 44453 44779 45093 

-28.4 -30.8 -33.5 -36.2 -39.0 -41.7 -44.3 -46.8 -49.1 -51.2 -53.1 -54.8 -56.4 -57.9 -59.4 -60.8 -62.4 -64.1 -66.1 

37906 38211 38525 38848 39176 39510 39846 40185 40525 40865 41204 41542 41877 42208 42536 42858 43173 43480 43778 

-30.3 -32.8 -35.4 -38.0 -40.7 -43.2 -45.6 -47.9 -49.9 -51.7 -53.3 -54.7 -55.9 -57.0 -58.1 -59.3 -60.5 -61.9 -63.6 

37097 37371 37654 37946 38243 38546 38852 39161 39471 39782 40093 40403 40711 41017 41319 41618 41911 42198 42476 

-32.2 -34.7 -37.2 -39.8 -42.3 -44.6 -46.8 -48.8 -50.5 -52.0 -53.2 -54.3 -55.1 -55.9 -56.6 -57.4 -58.3 -59.5 -60.9 

36340 36581 36832 37091 37356 37626 37900 38178 38457 38737 39018 39298 39578 39856 40132 40405 40675 40939 41196 

-34.0 -36.5 -38.9 -41.4 -43.7 -45.9 -47.9 -49.6 -51.0 -52.1 -53.0 -53.7 -54.2 -54.6 -55.0 -55.4 -56.0 -56.8 -57.9 

35636 35844 36061 36286 36518 36755 36996 37240 37487 37735 37984 38234 38484 38733 38981 39227 39471 39711 39946 

-35.7 -38.1 -40.5 -42.8 -45.0 -47.0 -48.7 -50.1 -51.3 -52.1 -52.7 -53.0 -53.1 -53.2 -53.2 -53.4 -53.6 -54.1 -55.0 

34990 35164 35347 35538 35735 35937 36144 36354 36567 36783 36999 37217 37436 37655 37874 38093 38310 38524 38735 

-37.3 -39.6 -41.9 -44.1 -46.1 -47.8 -49.3 -50.5 -51.4 -51.9 -52.2 -52.2 -52.0 -51.8 -51.5 -51.3 -51.3 -51.5 -52.0 

12 34408 34547 34695 34850 35012 35179 35351 35527 35706 35887 36070 36256 36443 36631 36820 37010 37199 37387 37573 

-38.7 -41.0 -43.1 -45.1 -46.9 -48.5 -49.8 -50.7 -51.3 -51.6 -51.6 -51.3 -50.9 -50.4 -49.8 -49.4 -49.1 -49.0 -49.3 

10 33894 33998 34111 34230 34356 34488 34624 34765 34909 35056 35206 35358 35513 35670 35828 35988 36149 36310 36469 

-40.0 -42.1 -44.1 -45.9 -47.5 -48.9 -50.0 -50.7 -51.1 -51.1 -50.9 -50.4 -49.8 -49.0 -48.3 -47.6 -47.1 -46.8 -46.9 

8 33456 33525 33601 33685 33775 33871 33971 34076 34185 34298 34414 34533 34655 34780 34908 35038 35169 35302 35434 

-41.0 -43.0 -44.8 -46.5 -47.9 -49.1 -50.0 -50.5 -50.7 -50.6 -50.2 -49.6 -48.8 -47.9 -46.9 -46.1 -45.4 -44.9 -44.7 

6 33100 33133 33174 33222 33275 33335 33400 33469 33543 33621 33703 33789 33878 33972 34068 34168 34270 34374 34478 

-41.8 -43.6 -45.3 -46.8 -48.1 -49.1 -49.8 -50.1 -50.2 -50.0 -49.5 -48.7 -47.8 -46.8 -45.8 -44.9 -44.0 -43.4 -43.0 

4 32834 32831 32836 32848 32865 32889 32917 32951 32990 33034 33082 33135 33192 33253 33319 33388 33460 33535 33611 

-42.5 -44.1 -45.6 -46.9 -48.0 -48.8 -49.4 -49.7 -49.6 -49.3 -48.8 -48.0 -47.1 -46.0 -45.0 -43.9 -43.0 -42.3 -41.S 

2 32663 32625 32594 32569 32551 32539 32532 32531 32535 32544 32559 32578 32603 32633 32668 32706 32748 32793 32840 

-42.9 -44.4 -45.6 -46.8 -47.7 -48.4 -48.9 -49.1 -49.0 -48.7 -48.1 -47.4 -46.5 -45.4 -44.4 -43.3 -42.4 -41.6 -40.9 

0 32592 32520 32453 32393 32339 32291 32249 32213 32182 32158 32140 32127 32120 32118 32122 32130 32142 32157 32174 

-43.3 -44.4 -45.5 -46.5 -47.3 -47.9 -48.3 -48.4 -48.3 -48.0 -47.5 -46.8 -46.0 -45.1 -44.1 -43.0 -42.1 -41.2 -40.5 
0 

....... 

LONG 

LAT 

30 

28 

26 

24 

22 

20 

IGRF 1980 TOTAL INTENSITY (F) 

-108 -106 -104 -102 -100 -98 -96 -94 -92 -90 -88 -86 -84 -82 -80 -78 -76 -74 -72 

49045 49375 49684 49971 50231 50463 50663 50829 50959 51049 51097 51101 51059 50971 50836 50653 50422 50145 49824 

-70.6 -73.2 -76.1 -79.2 -82.5 -86.0 -89.7 -93.6 -97.6-101.7-105.8-109.8-113.8-117.5-121.0-124.1-126.8-129.1-130.8 

47734 48057 48361 48644 48903 49134 49336 49504 49638 49733 49788 49800 49768 49690 49565 49393 49174 48910 48601 

-69.6 -72.2 -75.0 -78.0 -81.3 -84.9 -88.7 -92.7 -96.8-101.1-105.4-109.7-113.8-117.8-121.5-124.9-127.9-130.4-132.3 

46414 46728 47024 47300 47554 47782 47982 48151 48287 48386 48446 48465 48441 48373 48258 48098 47892 47640 47344 

-68.1 -70.5 -73.2 -76.1 -79.4 -82.9 -86.8 -90.9 -95.1 -99.5-104.0-108.5-112.8-117.0-120.9-124.5-127.7-130.5-132.7 

45093 45394 45679 45946 46192 46415 46612 46779 46915 47016 47080 47105 47088 47028 46925 46776 46582 46344 46063 

-66.1 -68.3 -70.8 -73.6 -76.8 -80.3 -84.2 -88.3 -92.6 -97.1-101.7-106.3-110.8-115.2-119.3-123.1-126.5-129.4-131.8 

43778 44063 44335 44591 44827 45042 45233 45397 45531 45633 45699 45728 45718 45666 45573 45435 45255 45031 44765 

-63.6 -65.6 -67.9 -70.6 -73.7 -77.1 -80.9 -85.0 -89.4 -93.9 -98.6-103.3-107.9-112.4-116.6-120.5-124.1-127.2-129.9 

42476 42744 43001 43242 43467 43672 43856 44014 44144 44245 44312 44344 44339 44295 44211 44085 43917 43707 43456 

-60.9 -62.6 -64.7 -67.2 -70.1 -73.5 -77.2 -81.2 -85.6 -90.1 -94.8 -99.5-104.1-108.7-113.0-117.1-120.8-124.1-126.9 

18 41196 41445 41684 41910 42121 42314 42488 42639 42764 42862 42929 42963 42962 42924 42848 42732 42577 42381 42146 

-57.9 -59.4 -61.3 -63.6 -66.3 -69.5 -73.1 -77.0 -81.3 -85.8 -90.4 -95.1 -99.7-104.3-108.7-112.8-116.6-120.0-122.9 

16 39946 40174 40393 40602 40797 40977 41140 41281 41400 41493 41558 41593 41594 41562 41493 41387 41243 41060 40840 

-55.0 -56.2 -57.8 -59.9 -62.4 -65.4 -68.8 -72.6 -76.7 -81.1 -85.6 -90.2 -94.8 -99.3-103.7-107.8-111.6-115.1-118.2 

14 38735 38940 39139 39328 39507 39672 39821 39952 40062 40149 40210 40243 40246 40217 40154 40056 39922 39752 39545 

-52.0 -53.0 -54.4 -56.2 -58.5 -61.3 -64.5 -68.1 -72.0 -76.2 -80.5 -85.0 -89.5 -93.9 -98.2-102.3-106.1-109.6-112.7 

12 37573 37754 37931 38100 38259 38407 38542 38660 38760 38838 38894 38924 38926 38899 38840 38748 38623 38464 38270 

-49.3 -50.0 -51.1 -52.7 -54.7 -57.2 -60.2 -63.6 -67.3 -71.2 -75.4 -79.6 -84.0 -88.2 -92.4 -96.4-100.2-103.7-106.8 

10 36469 36626 36779 36926 37065 37195 37312 37416 37503 37572_37620 37644 37643 37615 37559 37472 37353 37203 37021 

-46.9 -47.3 -48.1 -49.4 -51.2 -53.5 -56.2 -59.2 -62.7 -66.4 -70.3 -74.3 -78.4 -82.5 -86.5 -90.3 -94.0 -97.4-100.6 

8 35434 35565 35693 35817 35934 36044 36143 36230 36303 36359 36396 36413 36407 36376 36319 36234 36120 35977 35804 

-44.7 -44.9 -45.5 -46.6 -48.1 -5o.o -52.4 -55.2 -58.3 -61.7 -65.3 -69.1 -72.9 -76.7 -80.5 -84.2 -87.7 -91.1 -94.2 

6 34478 34582 34684 34783 34877 34965 35044 35112 35168 35209 35234 35240 35226 35189 35129 35044 34932 34793 34627 

-43.0 -43.0 -43.4 -44.2 -45.4 -47.0 -49.1 -51.5 -54.3 -57.4 -60.6 -64.1 -67.6 -71.2 -74.7 -78.2 -81.6 -84.8 -87.8 

4 33611 33687 33762 33835 33904 33967 34024 34071 34107 34131 34140 34133 34108 34063 33997 33908 33795 33658 33497 

-41.8 -41.6 -41.7 -42.2 -43.2 -44.5 -46.2 -48.3 -50.7 -53.4 -56.3 -59.4 -62.7 -65.9 -69.2 -72.4 -75.6 -78.6 -81.5 

32840 32887 32935 32980 33023 33060 33092 33116 33130 33134 33125 33101 33062 33005 32929 32834 32717 32579 32420 

-40.9 -40.6 -40.5 -40.8 -41.4 -42.4 -43.8 -45.5 -47.6 -49.9 -52.5 -55.2 -58.1 -61.1 -64.0 -67.0 -69.9 -72.8 -75.5 

0 32174 32192 32210 32227 32241 32251 32256 32255 32245 32225 32195 32151 32095 32023 31934 31829 31705 31563 31403 

-40.5 -40.0 -39.8 -39.8 -40.2 -40.9 -41.9 -43.3 -45.0 -46.9 -49.1 -51.5 -54.0 -56.6 -59.3 -62.0 -64.7 -67.3 -69.8 
IGRF 1980 TOTAL INTENSITY (F) 

LONG -72 -70 -68 -66 -64 -62 -60 -58 -56 -54 -52 -50 -48 -46 -44 -42 -40 -38 -36 

LAT 

30 49824 49460 49058 48621 48154 47661 47148 46621 46086 45549 45016 44492 43982 43492 43025 42584 42172 41791 41443 

-130.8-131.9-132.5-132.4-131.6-130.2-128.1-125.4-122.0-118.1-113.5-108.4-102.9 -96.9 -90.7 -84.2 -77.5 -70.7 -63.9 

28 48601 48249 47859 47434 46978 46496 45994 45477 44951 44423 43899 43383 42881 42399 41940 41507 41104 40731 40391 

-132.3-133.7-134.5-134.6-134.1-132.9-131.0-128.4-125.2-121.3-116.8-111.8-106.3-100.3 -94.0 -87.4 -80.6 -73.6 -66.7 

26 47344 47007 46631 46219 45777 45308 44818 44314 43800 43283 42769 42263 41772 41299 40849 40425 40031 39667 39336 

-132.7-134.3-135.3-135.7-135.4-134.4-132.8-130.4-127.4-123.7-119.4-114.5-109.0-103.1 -96.8 -90.1 -83.2 -76.2 -69.1 

24 46063 45741 45380 44984 44556 44103 43628 43137 42637 42133 41632 41138 40658 40197 39757 39344 38959 38606 38284 

-131.8-133.7-135.0-135.6-135.6-134.9-133.4-131.4-128.6-125.1-121.0-116.3-111.0-105.2 -98.9 -92.3 -85.4 -78.2 -71.0 

22 44765 44458 44113 43734 43323 42886 42428 41954 41469 40980 40493 40013 39546 39097 38669 38267 37894 37551 37241 

-129.9-132.0-133.5-134.4-134.6-134.2-133.1-131.3-128.8-125.6-121.7-117.3-112.1-106.5-100.3 -93.8 -86.9 -79.7 -72.4 

20 43456 43166 42839 42477 42084 41665 41224 40768 40300 39828 39356 38892 38439 38004 37590 37201 36840 36510 36212 

-126.9-129.2-130.9-132.0-132.6-132.4-131.6-130.2-128.0-125.1-121.6-117.3-112.5-107.0-101.0 -94.5 -87.6 -80.5 -73.2 

18 42146 41872 41562 41218 40844 40444 40022 39584 39135 38681 38227 37779 37343 36923 36524 36150 35803 35488 35204 

-122.9-125.4-127.3-128.7-129.5-129.7-129.2-128.1-126.2-123.7-120.4-116.5-111.9-106.6-100.8 -94.4 -87.7 -80.6 -73.2 

16 40840 40582 40290 39964 39609 39229 38827 38408 37979 37543 37108 36679 36260 35858 35476 35118 34789 34489 34222 

-118.2-120.8-122.9-124.5-125.6-126.0-125.9-125.1-123.6-121.3-118.4-114.8-110.4-105.4 -99.7 -93.5 -86.8 -79.8 -72.5 

14 39545 39304 39028 38721 38385 38024 37642 37244 36835 36420 36005 35595 35196 34813 34450 34112 33801 33520 33273 

0 -112.7-115.5-117.8-119.6-120.9-121.6-121.7-121.2-120.0-118.1-115.5-112.2-108.1-103.2 -97.8 -91.7 -85.2 -78.2 -71.0 

~ 

12 38270 38043 37784 37494 37177 36836 36474 36097 35709 35315 34922 34533 34156 33793 33452 33134 32845 32587 32361 

-106.8-109.6-112.0-114.0-115.5-116.5-116.9-116.6-115.7-114.1-111.8-108.7-104.8-100.2 -95.0 -89.1 -82.6 -75.7 -68.6 

10 37021 36807 36563 36290 35991 35669 35328 34972 34605 34234 33863 33497 33142 32803 32485 32192 31926 31692 31491 

-100.6-103.4-105.9-108.0-109.6-110.8-111.4-111.4-110.8-109.4-107.3-104.5-100.8 -96.4 -91.3 -85.6 -79.2 -72.5 -65.5 

8 35804 35602 35371 35114 34832 34529 34208 33873 33528 33180 32832 32491 32161 31848 31555 31288 31049 30842 30669 

-94.2 -97.0 -99.5-101.7-103.4-104.7-105.5-105.7-105.3-104.1-102.2 -99.6 -96.1 -91.9 -86.9 -81.3 -75.1 -68.5 -61.6 

6 34627 34434 34216 33972 33706 33421 33119 32806 32484 32159 31836 31521 31217 30931 30666 30427 30217 30040 29896 

-87.8 -90.5 -93.0 -95.2 -97.0 -98.4 -99.3 -99.6 -99.3 -98.3 -96.6 -94.0 -90.7 -86.7 -81.8 -76.4 -70.4 -64.0 -57.3 

4 33497 33311 33102 32871 32620 32351 32069 31776 31477 31176 30879 30590 30315 30057 29822 29613 29435 29288 29176 

-81.5 -84.2 -86.6 -88.8 -90.6 -92.0 -92.9 -93.3 -93.1 -92.2 -90.5 -88.1 -84.9 -80.9 -76.2 -70.9 -65.1 -58.9 -52.5 

2 32420 32239 32038 31817 31579 31326 31062 30789 30513 30237 29966 29705 29458 29231 29027 28850 28704 28590 28511 

-75.5 -78.0 -80.3 -82.4 -84.2 -85.6 -86.5 -86.9 -86.6 -85.8 -84.1 -81.8 -78.6 -74.8 -70.2 -65.1 -59.5 -53.6 -47.4 

0 31403 31224 31028 30815 30589 30350 30103 29851 29597 29346 29101 28869 28652 28456 28284 28140 28027 27946 27900 

-69.8 -72.2 -74.4 -76.3 -78.0 -79.3 -80.1 -80.4 -80.2 -79.3 -77.6 -75.3 -72.2 -68.4 -64.0 -59.1 -53.7 -48.1 -42.3 
~ 

LONG 

LAT 

30 

28 

26 

24 

22 

20 

IGRF 1980 TOTAL INTENSITY (F) 

-36 -34 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 

41443 41126 40842 40590 40369 40177 40014 39879 39770 39685 39625 39587 39571 39576 39601 39646 39709 39789 39886 

-63.9 -57.2 -50.7 -44.4 -38.3 -32.6 -27.3 -22.3 -17.7 -13.4 -9.6 -6.0 -2.8 0.2 2.9 5.5 7.8 10.1 12.2 

40391 40083 39808 39565 39353 39171 39018 38893 38793 38719 38669 38641 38635 38650 38685 38739 38812 38901 39006 

-66.7 -59.8 -53.0 -46.5 -40.2 -34.2 -28.6 -23.4 -18.6 -14.2 -10.2 -6.6 -3.2 -0.2 2.6 5.2 7.6 9.8 12.0 

39336 39037 38771 38538 38336 38164 38021 37906 37817 37754 37714 37697 37702 37727 37772 37836 37917 38015 38128 

-69.1 -62.0 -55.0 -48.3 -41.8 -35.6 -29.8 -24.5 -19.5 -14.9 -10.8 -7.0 -3.6 -0.5 2.4 5.0 7.4 9.6 11.7 

38284 37995 37739 37516 37324 37163 37031 36927 36850 36798 36769 36764 36780 36816 36871 36945 37036 37142 37263 

-71.0 -63.8 -56.7 -49.8 -43.1 -36.8 -30.8 -25.2 -20.1 -15.4 -11.1 -7.2 -3.7 -0.6 2.3 4.9 7.2 9.4 11.4 

37241 36963 36718 36506 36326 36177 36057 35965 35901 35861 35845 35852 35880 35927 35994 36078 36179 36294 36423 

-72.4 -65.1 -57.9 -50.8 -44.0 -37.5 -31.3 -25.6 -20.4 -15.5 -11.2 -7.2 -3.7 -0.5 2.4 5.0 7.3 9.4 11.3 

36212 35947 35715 35516 35349 35213 35107 35030 34979 34953 34951 34972 35013 35073 35152 35247 35358 35483 35620 

-73.2 -65.8 -58.5 -51.3 -44.4 -37.7 -31.5 -25.6 -20.3 -15.3 -10.9 -6.9 -3.3 -0.1 2.8 5.3 7.6 9.6 11.4 

18 35204 34953 34736 34552 34400 34280 34190 34129 34094 34085 34099 34134 34190 34264 34355 34463 34584 34719 34866 

-73.2 -65.8 -58.4 -51.2 -44.1 -37.4 -31.1 -25.1 -19.7 -14.7 -10.2 -6.2 -2.6 0.6 3.5 5.9 8.1 10.0 11.7 

16 34222 33988 33788 33622 33488 33386 33315 33272 33256 33265 33296 33349 33421 33510 33615 33736 33869 34015 34172 

-72.5 -65.1 -57.7 -50.4 -43.3 -36.5 -30.1 -24.1 -18.6 -13.6 -9.1 -5.1 -1.5 1.7 4.5 6.9 9.0 10.8 12.3 

14 33273 33058 32878 32732 32619 32539 32489 32467 32472 32501 32552 32624 32713 32819 32940 33074 33221 33378 33545 

-71.0 -63.6 -56.2 -48.9 -41.8 -35.0 -28.6 -22.6 -17.1 -12.2 -7.7 -3.6 -0.1 3.1 5.8 8.1 10.1 11.7 13.1 

12 32361 32169 32012 31889 31800 31743 31717 31719 31748 31799 31872 31965 32073 32197 32335 32485 32645 32815 32993 

-68.6 -61.3 -53.9 -46.7 -39.6 -32.9 -26.6 -20.7 -15.3 -10.3 -5.9 -1.9 1.6 4.6 7.3 9.5 11.4 12.9 14.1 

10 31491 31325 31193 31097 31034 31004 31004 31033 31086 31163 31260 31374 31504 31647 31803 31969 32144 32328 32519 

-65.5 -58.2 -51.0 -43.9 -37.0 -30.4 -24.2 -18.4 -13.1 -8.3 -4.0 -0.1 3.3 6.3 8.8 11.0 12.8 14.1 15.1 

8 30669 30530 30427 30359 30326 30324 30353 30409 30490 30592 30714 30852 31003 31167 31342 31525 31717 31916 32120 

-61.6 -54.6 -47.5 -40.6 -33.9 -27.5 -21.5 -15.9 -10.8 -6.2 -2.0 1.7 5.0 7.9 10.3 12.4 14.1 15.3 16.2 

6 29896 29788 29715 29678 29675 29703 29762 29847 29956 30085 30232 30394 30569 30754 30948 31150 31359 31574 31793 

-57.3 -50.4 -43.6 -36.9 -30.5 -24.4 -18.7 -13.4 -8.6 -4.2 -0.2 3.3 6.5 9.2 11.6 13.6 15.1 16.3 17.0 

4 29176 29100 29059 29054 29081 29141 29229 29344 29481 29637 29810 29996 30193 30400 30615 30836 31063 31294 31530 

-52.5 -45.9 -39.4 -33.1 -27.0 -21.3 -15.9 -11.0 -6.5 -2.4 1.3 4.6 7.6 10.2 12.5 14.3 15.8 16.8 17.4 

2 28511 28467 28458 28485 28544 28634 28752 28894 29059 29241 29439 29649 29869 30097 30332 30572 30818 31067 31319 

-47.4 -41.3 -35.1 -29.2 -23.6 -18.3 -13.5 -9.0 -4.8 -1.1 2.3 5.4 8.2 10.7 12.8 14.6 16.0 16.9 17.3 

0 27900 27889 27912 27969 28059 28178 28324 28494 28684 28891 29112 29344 29586 29835 30089 30349 30613 30879 31148 

-42.3 -36.6 -31.0 -25.6 -20.5 -15.7 -11.4 -7.3 -3.7 -0.3 2.8 5.6 8.2 10.5 12.5 14.1 15.4 16.3 16.6 
..... 

..... 

0 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 0 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 

LAT 

0 31148 31419 31688 31955 32218 32472 32716 32947 33161 33356 33530 33681 33811 33919 34007 34080 34140 34194 34248 

16.6 16.4 15.6 14.1 12.0 9.3 6.0 2.3 -1.9 -6.3 -11.0 -15.7 -20.3 -24.8 -29.0 -32.7 -36.0 -38.8 -41.1 

-2 31005 31290 31574 31854 32128 32391 32643 32878 33094 33288 33459 33605 33727 33825 33902 33963 34011 34052 34094 

15.2 14.8 13.8 12.1 9.7 6.7 3.1 -1.1 -5.7 -10.6 -15.7 -20.9 -26.0 -30.8 -35.3 -39.3 -42.8 -45.7 -48.0 

-4 30875 31175 31472 31763 32046 32318 32574 32813 33029 33222 33389 33528 33642 33730 33796 33845 33882 33913 33946 

12.9 12.4 11.2 9.3 6.7 3.4 -0.5 -5.1 -10.1 -15.4 -21.0 -26.5 -31.9 -37.1 -41.9 -46.1 -49.7 -52.7 -54.9 

-6 30748 31060 31368 31668 31959 32236 32496 32735 32950 33139 33300 33432 33536 33615 33671 33710 33738 33761 33789 

9.8 9.2 7.9 5.8 3.0 -0.6 -4.9 -9.7 -15.1 -20.8 -26.6 -32.5 -38.3 -43.7 -48.6 -53.0 -56.7 -59.6 -61.7 

-8 30614 30935 31250 31557 31852 32132 32392 32629 32841 33024 33177 33301 33396 33464 33511 33542 33562 33582 33607 

6.0 5.2 3.7 1.5 -1.6 -5.4 -9.9 -15.0 -20.6 -26.6 -32.8 -38.9 -44.8 -50.4 -55.5 -59.9 -63.5 -66.3 -68.3 

-10 30463 30790 31110 31420 31716 31995 32252 32484 32689 32864 33008 33122 33207 33267 33305 33329 33346 33363 33391 

1.4 0.5 -1.2 -3.6 -6.8 -10.8 -15.5 -20.9 -26.7 -32.9 -39.2 -45.5 -51.6 -57.2 -62.3 -66.7 -70.2 -72.8 -74.5 

-12 30292 30621 30941 31250 31543 31816 32067 32291 32487 32651 32785 32888 32963 33014 33045 33065 33080 33100 33134 

-3.8 -4.9 -6.7 -9.3 -12.7 -16.9 -21.8 -27.3 -33.3 -39.5 -46.0 -52.3 -58.4 -64.1 -69.0 -73.2 -76.5 -78.9 -80.1 

-14 30097 30423 30739 31041 31327 31592 31832 32045 32229 32381 32503 32594 32659 32702 32729 32747 32764 32790 32835 

-16 

-9.5 -10.8 -12.8 -15.6 -19.1 -23.4 -28.5 -34.1 -40.1 -46.4 -52.9 -59.2 -65.2 -70.7 -75.5 -79.5 -82.4 -84.3 -85.2 

29877 30195 30502 30795 31069 31321 31547 31746 31915 32053 32162 32242 32298 32334 32358 32377 32400 32436 32496 

-15.6 -17.2 -19.4 -22.3 -26.0 -30.4 -35.5 -41.1 -47.2 -53.5 -59.8 -66.0 -71.8 -77.1 -81.6 -85.2 -87.7 -89.1 -89.4 

-18 29634 29940 30233 30511 30769 31005 31215 31396 31549 31672 31767 31836 31884 31916 31939 31962 31994 32045 32125 

-22.1 -23.8 -26.2 -29.4 -33.2 -37.7 -42.8 -48.4 -54.4 -60.5 -66.7 -72.6 -78.2 -83.1 -87.2 -90.3 -92.3 -93.1 -92.8 

-20 29371 29660 29936 30195 30434 30650 30840 31003 31138 31246 31327 31386 31427 31457 31483 31514 31560 31629 31733 

-28.7 -30.7 -33.3 -36.6 -40.5 -45.1 -50.2 -55.7 -61.5 -67.5 -73.4 -79.0 -84.1 -88.5 -92.1 -94.7 -96.1 -96.2 -95.2 

-22 29094 29362 29616 29854 30071 30265 30434 30577 30694 30785 30854 30905 30942 30973 31005 31048 31110 31203 31336 

-35.4 -37.7 -40.5 -44.0 -48.0 -52.5 -57.5 -62.9 -68.5 -74.2 -79.7 -84.9 -89.5 -93.4 -96.4 -98.3 -99.0 -98.4 -96.6 

-24 28808 29053 29283 29496 29688 29859 30006 30129 30228 30306 30364 30409 30445 30480 30522 30580 30665 30784 30949 

-42.0 -44.6 -47.7 -51.3 -55.3 -59.9 -64.8 -70.0 -75.3 -80.6 -85.7 -90.3 -94.4 -97.6 -99.9-101.0-101.0 -99.6 -97.1 

-26 28522 28741 28945 29132 29300 29447 29572 29676 29759 29824 29875 29916 29955 29998 30054 30132 30242 30392 30592 

-48.6 -51.5 -54.8 -58.5 -62.6 -67.1 -71.8 -76.8 -81.7 -86.6 -91.2 -95.2 -98.6-101.1-102.6-103.0-102.1-100.0 -96~6 

-28 28244 28435 28613 28774 28917 29041 29146 29233 29302 29358 29405 29447 29492 29547 29621 29723 29862 30046 30284 

-55.1 -58.2 -61.7 -65.5 -69.6 -74.0 -78.6 -83.2 -87.8 -92.1 -96.1 -99.5-102.2-103.9-104.6-104.1-102.4 -99.5 -95.3 

-30 27982 28147 28299 28435 28555 28658 28745 28817 28877 28927 28973 29021 29077 29149 29245 29374 29545 29766 30043 

-61.3 -64.7 -68.4 -72.3 -76.4 -80.6 -84.9 -89.2 -93.4 -97.2-100.5-103.2-105.1-106.0-105.9-104.6-102.1 -98.3 -93.4 
..... 

..... 

LONG 

LAT 

36 38 40 42 

IGRF 1980 

44 46 48 50 

TOTAL INTENSITY (F) 

52 54 56 58 60 62 64 66 68 70 72 

0 34248 34306 34375 34461 34570 34705 34869 35065 35293 35553 35844 36163 36506 36871 37252 37646 38048 38452 38854 

-41.1 -42.8 -44.1 -44.8 -45.1 -45.0 -44.6 -44.0 -43.2 -42.2 -41.1 -40.0 -38.7 -37.3 -35.8 -34.2 -32.3 -30.3 -28.0 

-2 34094 34142 34205 34287 34395 34533 34706 34914 35159 35441 35757 36105 36481 36881 37300 37734 38176 38621 39065 

-48.0 -49.7 -50.7 -51.3 -51.3 -50.9 -50.2 -49.2 -48.0 -46.6 -45.1 -43.6 -42.0 -40.2 -38.4 -36.4 -34.3 -32.0 -29.4 

-4 33946 33989 34047 34129 34241 34388 34573 34798 35065 35373 35718 36100 36512 36951 37411 37886 38371 38861 39348 

-54.9 -56.4 -57.3 -57.6 -57.2 -56.5 -55.3 -53.9 -52.2 -50.4 -48.5 -46.6 -44.5 -42.4 -40.3 -38.0 -35.5 -32.9 -30.0 

-6 33789 33828 33888 33974 34095 34255 34457 34705 34998 35336 35715 36133 36585 37066 37569 38089 38620 39155 39687 

-61.7 -63.0 -63.6 -63.5 -62.8 -61.6 -60.0 -58.0 -55.8 -53.5 -51.2 -48.7 -46.3 -43.8 -41.3 -38.6 -35.9 -33.0 -29.9 

-8 33607 33648 33713 33809 33944 34122 34347 34621 34946 35318 35735 36194 36689 37213 37763 38329 38907 39489 40068 

-10 

-68.3 -69.3 -69.6 -69.0 -67.9 -66.1 -63.9 -61.4 -58.7 -55.8 -52.9 -50.0 -47.1 -44.2 -41.3 -38.4 -35.4 -32.2 -28.9 

33391 33438 33513 33624 33777 33979 34232 34539 34898 35309 35768 36270 36811 37382 37979 38594 39220 39850 40477 

-74.5 -75.2 -75.0 -74.0 -72.2 -69.9 -67.1 -64.0 -60.7 -57.2 -53.8 -50.4 -47.0 -43.7 -40.5 -37.2 -34.0 -30.6 -27.2 

-12 33134 33192 33282 33413 33591 33821 34107 34450 34849 35303 35806 36355 36943 37563 38209 38873 39548 40226 40902 

-80.1 -80.4 -79.7 -78.1 -75.8 -72.8 -69.4 -65.6 -61.7 -57.6 -53.6 -49.7 -45.9 -42.2 -38.7 -35.2 -31.7 -28.2 -24.7 

-14 32835 32908 33019 33174 33382 33646 33969 34353 34795 35294 35845 36442 37079 37749 38445 39158 39883 40610 41335 

-85.2 -84.9 -83.6 -81.4 -78.4 -74.8 -70.7 -66.2 -61.6 -57.0 -52.5 -48.0 -43.8 -39.8 -36.0 -32.3 -28.7 -25.1 -21.5 

-16 32496 32590 32725 32911 33152 33454 33819 34247 34736 35283 35883 36530 37217 37937 38682 39446 40219 40995 41767 

-89.4 -88.6 -86.6 -83.8 -80.1 -75.7 -70.9 -65.8 -60.6 -55.4 -50.3 -45.4 -40.8 -36.5 -32.5 -28.6 -24.9 -21.4 -17.9 

-18 32125 32243 32409 32629 32909 33253 33662 34137 34674 35271 35921 36618 37356 38126 38920 39732 40553 41377 42195 

-92.8 -91.3 -88.6 -85.0 -80.6 -75.6 -70.1 -64.3 -58.5 -52.8 -47.2 -42.0 -37.1 -32.5 -28.3 -24.4 -20.7 -17.2 -13.8 

-20 31733 31881 32080 32339 32660 33049 33506 34029 34617 35263 35964 36711 37498 38316 39159 40018 40885 41754 42617 

-95.2 -92.9 -89.6 -85.2 -80.1 -74.4 -68.2 -61.8 -55.5 -49.3 -43.4 -37.8 -32.6 -27.9 -23.6 -19.7 -16.1 -12.7 -9.6 

-22 31336 31516 31754 32053 32420 32856 33361 33934 34571 35267 36017 36813 37647 38512 39401 40304 41215 42127 43033 

-96.6 -93.6 -89.5 -84.4 -78.6 -72.2 -65.4 -58.5 -51.7 -45.1 -38.9 -33.1 -27.8 -23.0 -18.6 -14.8 -11.3 -8.2 -5.4 

-24 30949 31167 31444 31788 32201 32685 33239 33861 34547 35292 36088 36930 37810 38718 39649 40594 41546 42498 43443 

-97.1 -93.3 -88.4 -82.6 -76.1 -69.1 -61.9 -54.5 -47.3 -40.4 -34.0 -28.0 -22.7 -17.9 -13.6 -9.9 -6.7 -3.9 -1.4 

-26 30592 30849 31170 31559 32019 32550 33152 33822 34555 35345 36186 37071 37991 38940 39910 40893 41881 42869 43850 

-96.6 -92.0 -86.5 -80.0 -72.9 -65.4 -57.7 -50.1 -42.6 -35.5 -28.9 -22.9 -17.6 -12.9 -8.8 -5.3 -2.4 0.1 2.2 

-28 30284 30583 30947 31382 31888 32466 33114 33829 34605 35437 36319 37242 38199 39184 40188 41204 42225 43245 44257 

-95.3 -90.1 -83.8 -76.8 -69.2 -61.3 -53.3 -45.4 -37.8 -30.6 -24.0 -18.1 -12.8 -8.3 -4.5 -1.3 1.3 3.4 5.1 

-30 30043 30384 30793 31272 31823 32445 33136 33892 34707 35577 36494 37450 38440 39454 40487 41532 42581 43628 44667 

-93.4 -87.5 -80.7 -73.2 -65.3 -57.1 -48.9 -40.8 -33.2 -26.0 -19.5 -13.7 -8.7 -4.4 -0.8 2.0 4.3 6.0 7.2 
t-.) 

LONG 

LAT 

72 74 76 78 

IGRF 1980 

80 82 84 86 

TOTAL INTENSITY (F) 

88 90 92 94 96 98 100 102 104 106 108 

0 38854 39249 39633 40001 40349 40673 40970 41236 41468 41666 41828 41953 42042 42096 42117 42107 42069 42006 41921 

-28.0 -25.5 -22.7 -19.6 -16.4 -12.9 -9.2 -5.5 -1.7 2.1 5.8 9.4 12.7 15.9 18.7 21.2 23.3 25.1 26.6 

-2 39065 39502 39926 40334 40720 41080 41410 41708 41970 42194 42379 42525 42633 42702 42736 42737 42709 42654 42577 

-29.4 -26.5 -23.5 -20.1 -16.5 -12.8 -8.8 -4.8 -0.7 3.3 7.2 11.0 14.5 17.7 20.6 23.2 25.4 27.2 28.6 

-4 39348 39828 40295 40744 41170 41569 41936 42267 42561 42814 43026 43195 43324 43412 43462 43478 43462 43418 43351 

-30.0 -26.9 -23.6 -20.0 -16.2 -12.1 -8.0 -3.7 0.5 4.7 8.8 12.7 16.4 19.7 22.7 25.3 27.5 29.3 30.7 

-6 39687 40213 40724 41216 41684 42123 42528 42896 43223 43508 43749 43945 44098 44208 44278 44311 44311 44281 44227 

-29.9 -26.6 -23.0 -19.2 -15.2 -11.0 -6.7 -2.3 2.1 6.4 10.6 14.6 18.4 21.8 24.8 27.5 29.7 31.4 32.8 

-8 40068 40640 41197 41733 42244 42725 43170 43576 43940 44259 44531 44757 44937 45072 45165 45219 45237 45225 45186 

-28.9 -25.4 -21.7 -17.8 -13.7 -9.4 -5.0 -0.6 3.9 8.3 12.6 16.6 20.4 23.8 26.9 29.5 31.7 33.4 34.7 

-10 40477 41096 41699 42281 42837 43360 43846 44292 44694 45049 45356 45615 45825 45988 46107 46185 46225 46233 46213 

-27.2 -23.6 -19.8 -15.8 -11.7 -7.4 -3.0 1.4 5.9 10.3 14.5 18.5 22.3 25.7 28.7 31.3 33.5 35.2 36.4 

-12 40902 41569 42219 42847 43447 44014 44543 45030 45472 45865 46209 46502 46745 46939 47087 47192 47257 47289 47290 

-24.7 -21.0 -17.3 -13.3 -9.3 -5.1 -0.8 3.6 7.9 12.2 16.4 20.3 24.0 27.3 30.3 32.8 34.9 36.5 37.7 

-14 41335 42049 42746 43420 44065 44676 45248 45777 46260 46693 47075 47405 47683 47911 48091 48225 48319 48376 48402 

-21.5 -17.9 -14.2 -10.4 -6.5 -2.5 1.6 5.8 10.0 14.1 18.0 21.8 25.3 28.5 31.4 33.8 35.8 37.3 38.4 

-16 41767 42528 43271 43991 44681 45336 45952 46524 47048 47522 47943 48312 48627 48891 49105 49272 49396 49482 49534 

-17.9 -14.4 -10.9 -7.3 -3.6 0.2 4.0 7.9 11.8 15.6 19.3 22.9 26.2 29.2 31.9 34.2 36.1 37.6 38.6 

-18 42195 43002 43791 44555 45289 45988 46647 47261 47827 48342 48804 49212 49566 49867 50117 50319 50476 50592 50672 

-13.8 -10.5 -7.3 -3.9 -0.6 2.8 6.3 9.8 13.4 16.8 20.2 23.5 26.5 29.3 31.8 34.0 35.7 37.1 38.0 

-20 42617 43468 44300 45108 45885 46626 47327 47983 48590 49147 49649 50098 50491 50831 51118 51355 51547 51695 51806 

-9.6 -6.6 -3.6 -0.7 2.3 5.3 8.3 11.4 14.5 17.6 20.6 23.5 26.2 28.7 31.0 33.0 34.6 35.8 36.6 

-22 43033 43925 44799 45648 46465 47247 47989 48686 49334 49931 50474 50962 51395 51774 52099 52373 52600 52782 52924 

-5.4 -2.7 -0.1 2.4 4.9 7.4 9.9 12.5 15.1 17.7 20.3 22.8 25.2 27.4 29.4 31.1 32.6 33.7 34.5 

-24 43443 44374 45287 46174 47030 47850 48631 49366 50054 50690 51273 51800 52273 52690 53054 53365 53627 53844 54018 

-1.4 0.9 3.0 5.1 7.0 9.0 11.0 13.0 15.1 17.2 19.3 21.4 23.4 25.2 27.0 28.5 29.8 30.8 31.5 

-26 43850 44817 45764 46687 47578 48435 49251 50024 50748 51422 52043 52609 53120 53575 53976 54325 54623 54873 55079 

2.2 4.0 5.7 7.2 8.6 10.0 11.4 12.9 14.4 16.0 17.6 19.2 20.7 22.3 23.7 25.0 26.1 27.0 27.7 

-28 44257 45255 46234 47188 48112 49001 49851 50657 51417 52126 52783 53385 53933 54425 54863 55247 55580 55864 56103 

5.1 6.5 7.6 8.6 9.4 10.2 11.1 11.9 12.9 13.9 15.0 16.1 17.3 18.5 19.6 20.7 21.6 22.4 23.1 

-30 44667 45693 46699 47681 48633 49551 50431 51268 52059 52801 53491 54128 54710 55238 55710 56129 56496 56813 57082 

7.2 8.1 8.7 9.1 9.4 9.6 9.9 10.2 10.6 11.0 11.6 12.3 13.1 13.9 14.8 15.6 16.4 17.1 17.7 
w 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 

LAT 

0 41921 41818 41700 41569 41428 41279 41122 40960 40790 40615 40433 40245 40048 39844 39632 39411 39183 38949 38708 

26.6 27.7 28.5 28.9 29.1 29.1 28.8 28.3 27.7 26.9 25.9 24.9 23.8 22.6 21.3 20.0 18.6 17.1 15.6 

-2 42577 42482 42371 42247 42115 41974 41828 41676 41518 41356 41187 41012 40829 40638 40439 40230 40013 39787 39555 

28.6 29.6 30.3 30.7 30.8 30.6 30.2 29.6 28.7 27.8 26.7 25.5 24.2 22.8 21.3 19.8 18.2 16.6 14.9 

-4 43351 43265 43163 43049 42925 42794 42658 42516 42371 42220 42063 41901 41730 41551 41363 41165 40957 40739 40512 

30.7 31.7 32.3 32.6 32.5 32.2 31.6 30.8 29.8 28.6 27.4 25.9 24.4 22.8 21.2 19.4 17.7 15.8 14.0 

-6 44227 44152 44061 43957 43844 43723 43598 43467 43332 43193 43048 42897 42737 42569 42391 42201 42001 41790 41569 

32.8 33.7 34.2 34.4 34.2 33.7 32.9 32.0 30.8 29.4 27.9 26.2 24.5 22.7 20.8 18.9 16.9 14.9 12.9 

-8 45186 45126 45048 44956 44855 44746 44632 44512 44389 44260 44126 43985 43836 43677 43507 43326 43132 42926 42709 

34.7 35.6 36.0 36.0 35.7 35.1 34.1 32.9 31.5 30.0 28.2 26.4 24.4 22.3 20.2 18.1 15.9 13.8 11.7 

-10 46213 46169 46107 46030 45942 45846 45743 45635 45523 45405 45281 45149 45009 44858 44696 44521 44334 44132 43918 

36.4 37.2 37.5 37.4 37.0 36.2 35.1 33.7 32.1 30.3 28.3 26.3 24.1 21.8 19.5 17.2 14.8 12.5 10.3 

-12 47290 47266 47222 47161 47088 47006 46916 46820 46718 46611 46496 46373 46241 46098 45942 45773 45590 45392 45180 

37.7 38.3 38.6 38.4 37.8 36.9 35.7 34.1 32.4 30.4 28.2 25.9 23.6 21.1 18.6 16.1 13.6 11.2 8.8 

-14 48402 48400 48376 48334 48278 48210 48134 48050 47959 47862 47756 47641 47516 47379 47229 47065 46886 46691 46480 

38.4 39.0 39.2 38.9 38.3 37.2 35.9 34.2 32.3 30.2 27.8 25.4 22.8 20.2 17.6 14.9 12.3 9.7 7.3 

~16 49534 49556 49554 49533 49495 49443 49381 49310 49230 49142 49045 48938 48819 48687 48542 48381 48205 48012 47803 

38.6 39.1 39.2 38.9 38.2 37.0 35.6 33.8 31.8 29.6 27.2 24.6 21.9 19.2 16.4 13.6 10.9 8.3 5.8 

-18 50672 50721 50744 50744 50725 50691 50644 50585 50517 50438 50348 50248 50135 50008 49866 49708 49534 49342 49134 

38.0 38.5 38.5 38.2 37.4 36.3 34.8 33.0 30.9 28.6 26.2 23.5 20.8 18.0 15.2 12.3 9.6 6.9 4.3 

-20 51806 51883 51931 51954 51956 51939 51908 51862 51805 51735 51653 51558 51450 51327 51188 51032 50859 50668 50460 

36.6 37.1 37.1 36.8 36.0 34.9 33.4 31.6 29.6 27.3 24.8 22.2 19.5 16.7 13.8 11.0 8.3 5.6 3.0 

-22 52924 53030 53105 53152 53174 53177 53161 53129 53082 53021 52946 52857 52753 52632 52496 52341 52169 51978 51770 

34.5 34.9 34.9 34.6 33.9 32.8 31.4 29.8 27.8 25.6 23.2 20.6 18.0 15.2 12.5 9.7 7.0 4.4 1.9 

-24 54018 54154 54255 54327 54372 54393 54393 54375 54339 54287 54218 54134 54033 53915 53780 53626 53454 53263 53054 

31.5 31.9 31.9 31.7 31.1 30.1 28.9 27.3 25.5 23.5 21.2 18.8 16.3 13.7 11.0 8.4 5.8 3.3 0.8 

-26 55079 55245 55375 55471 55538 55578 55595 55590 55565 55521 55459 55380 55282 55166 55031 54878 54706 54514 54304 

27.7 28.1 28.2 28.0 27.5 26.8 25.7 24.3 22.7 20.9 18.9 16.7 14.4 12.0 9.5 7.1 4.6 2.2 -0.1 

-28 56103 56298 56455 56577 56665 56725 56758 56767 56753 56718 56662 56587 56492 56378 56244 56091 55918 55726 55515 

23.1 23.5 23.7 23.6 23.3 22.8 21.9 20.8 19.5 18.0 16.2 14.3 12.3 10.2 8.0 5.7 3.5 1.3 -0.9 

-30 57082 57308 57492 57638 57748 57827 57877 57899 57897 57870 57821 57750 57659 57546 57413 57260 57087 56894 56682 

17.7 18.2 18.5 18.6 18.5 18.2 17.6 16.9 15.9 14.6 13.2 11.7 10.0 8.2 6.3 4.3 2.3 0.3 -1.6 
,&:.. 

LONG 

LAT 

144 146 148 150 

IGRF 1980 

152 154 156 158 

TOTAL INTENSITY (F) 

160 162 164 166 168 170 1 7 2 174 17 6 178 180 

0 38708 38464 38216 37967 37719 37472 37229 36990 36756 36530 36310 36097 35892 35694 35504 35321 35145 34975 34811 

15.6 14.0 12.5 10.9 9.2 7.6 5.9 4.2 2.5 0.7 -1.1 -2.9 -4.8 -6.7 -8.7 -10.7 -12.6 -14.6 -16.6 

-2 39555 39316 39072 38825 38576 38326 38078 37832 37589 37349 37114 36884 36659 36440 36225 36016 35811 35612 35417 

14.9 13.2 11.5 9.8 8.1 6.3 4.6 2.9 1.2 -0.6 -2.4 -4.2 -6.0 -7.9 -9.8 -11.7 -13.7 -15.6 -17.6 

-4 40512 40278 40037 39790 39539 39286 39032 38777 38523 38271 38021 37773 37528 37286 37047 36812 36579 36350 36125 

14.0 12.2 10.3 8.5 6.7 4.9 3.2 1.5 -0.3 -2.0 -3.7 -5.5 -7.2 -9.1 -10.9 -12.8 -14.8 -16.7 -18.7 

-6 41569 41337 41098 40850 40597 40340 40079 39815 39550 39285 39019 38754 38489 38225 37962 37701 37441 37184 36928 

12.9 11.0 9.0 7.1 5.2 3.4 1.7 -0.1 -1.8 -3.5 -5.1 -6.8 -8.6 -10.3 -12.1 -14.0 -15.9 -17.9 -19.9 

-8 42709 42480 42241 41993 41737 41474 41206 40934 40658 40379 40098 39816 39532 39247 38961 38675 38389 38104 37820 

11.7 9.6 7.5 5.5 3.6 1.8 0.0 -1.7 -3.4 -5.0 -6.6 -8.2 -9.9 -11.6 -13.4 -15.2 -17.1 -19.1 -21.1 

-10 43918 43691 43452 43202 42943 42675 42400 42119 41832 41541 41245 40946 40644 40339 40031 39722 39411 39100 38789 

10.3 8.1 5.9 3.9 1.9 0.1 -1.7 -3.3 -5.0 -6.5 -8.1 -9.7 -11.3 -13.0 -14.7 -16.5 -18.4 -20.3 -22.3 

-12 45180 44954 44715 44463 44200 43928 43646 43356 43059 42756 42447 42132 41813 41489 41161 40830 40496 40161 39826 

8.8 6.5 4.3 2.2 0.2 -1.6 -3.4 -5.0 -6.6 -8.1 -9.6 -11.1 -12.7 -14.3 -16.0 -17.7 -19.6 -21.6 -23.6 

-14 46480 46255 46015 45761 45495 45217 44929 44631 44325 44010 43688 43360 43024 42683 42337 41986 41632 41275 40916 

7.3 4.9 2.6 0.5 -1.4 -3.3 -5.0 -6.6 -8.1 -9.6 -11.1 -12.5 -14.0 -15.6 -17.3 -19.0 -20.9 -22.8 -24.8 

-16 47803 47577 47336 47081 46811 46529 46235 45930 45614 45290 44956 44615 44265 43909 43546 43177 42804 42427 42048 

5.8 3.3 1.1 -1.1 -3.0 -4.9 -6.5 -8.1 -9.6 -11.0 -12.5 -13.9 -15.4 -16.9 -18.5 -20.3 -22.1 -24.0 -26.1 

-18 49134 48908 48666 48408 48135 47849 47549 47238 46915 46581 46237 45884 45523 45152 44775 44391 44001 43607 43209 

4.3 1.9 -0.4 -2.5 -4.5 -6.3 -7.9 -9.5 -11.0 -12.4 -13.7 -15.1 -16.6 -18.1 -19.7 -21.5 -23.3 -25.3 -27.3 

-20 50460 50234 49990 49730 49455 49164 48860 48543 48213 47871 47519 47156 46783 46402 46011 45614 45210 44801 44388 

3.0 0.6 -1.7 -3.8 -5.7 -7.5 -9.2 -10.7 -12.1 -13.5 -14.9 -16.3 -17.8 -19.3 -20.9 -22.6 -24.5 -26.5 -28.5 

-22 51770 51543 51298 51036 50758 50464 50156 49833 49498 49150 48790 48419 48037 47646 47245 46836 46420 45999 45573 

1.9 -0.5 -2.8 -4.8 -6.7 -8.5 -10.2 -11.7 -13.1 -14.5 -15.9 -17.3 -18.8 -20.4 -22.0 -23.8 -25.7 -27.7 -29.7 

-24 53054 52826 52579 52316 52035 51739 51427 51101 50761 50407 50042 49664 49275 48875 48466 48049 47623 47192 46755 

0.8 -1.5 -3.6 -5.7 -7.6 -9.3 -10.9 -12.5 -13.9 -15.4 -16.8 -18.3 -19.8 -21.4 -23.1 -24.9 -26.8 -28.9 -31.0 

-26 54304 54075 53827 53562 53280 52981 52666 52337 51993 51636 51266 50883 50489 50083 49668 49243 48811 48372 47928 

-0.1 -2.3 -4.4 -6.3 -8.2 -9.9 -11.5 -13.1 -14.6 -16.1 -17.6 -19.1 -20.7 -22.3 -24.1 -26.0 -28.0 -30.1 -32.2" 

-28 55515 55284 55036 54769 54485 54185 53868 53537 53191 52830 52457 52071 51673 51264 50844 50415 49978 49534 49084 

-0.9 -2.9 -4.9 -6.8 -8.6 -10.3 -11.9 -13.5 -15.1 -16.6 -18.2 -19.8 -21.5 -23.3 -25.1 -27.1 -29.2 -31.3 -33.5 

-30 56682 56450 56201 55933 55648 55346 55029 54696 54349 53987 53612 53224 52824 52413 51991 51559 51120 50673 50221 

-1.6 -3.5 -5.4 -7.2 -8.9 -10.6 -12.2 -13.9 -15.5 -17.1 -18.8 -20.5 -22.3 -24.2 -26.1 -28.2 -30.4 -32.6 -34.8 
01 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 180 -178 -176 -174 -172 -170 -168 -166 -164 -162 -160 -158 -156 -154 -152 -150 -148 -146 -144 

LAT 

0 34811 34652 34498 34348 34202 34059 33920 33784 33651 33522 33397 33277 33162 33051 32947 32849 32757 32671 32592 

-16.6 -18.5 -20.3 -22.1 -23.8 -25.4 -27.0 -28.4 -29.9 -31.3 -32.6 -34.0 -35.3 -36.6 -38.0 -39.3 -40.7 -42.0 -43.3 

-2 35417 35227 35040 34858 34680 34505 34334 34167 34003 33844 33688 33537 33391 33250 33114 32984 32859 32740 32627 

-17.6 -19.5 -21.4 -23.3 -25.0 -26.7 -28.3 -29.9 -31.4 -32.7 -34.1 -35.4 -36.6 -37.8 -39.0 -40.2 -41.3 -42.4 -43.4 

-4 36125 35903 35685 35471 35260 35054 34851 34652 34458 34268 34082 33901 33724 33553 33386 33224 33067 32915 32768 

-18.7 -20.7 -22.6 -24.5 -26.3 -28.1 -29.8 -31.4 -32.9 -34.3 -35.5 -36.8 -37.9 -39.0 -40.0 -40.9 -41.8 -42.7 -43.5 

-6 36928 36676 36427 36181 35939 35701 35467 35238 35013 34793 34578 34367 34160 33959 33761 33568 33380 33196 33017 

-19.9 -21.9 -23.9 -25.8 -27.7 -29.5 -31.3 -32.9 -34.4 -35.7 -37.0 -38.1 -39.1 -40.0 -40.8 -41.6 -42.3 -42.9 -43.5 

-8 37820 37538 37259 36983 36710 36442 36178 35919 35665 35416 35171 34931 34696 34465 34238 34015 33796 33581 33370 

-21.1 -23.1 -25.2 -27.2 -29.1 -31.0 -32.7 -34.4 -35.9 -37.2 -38.4 -39.4 -40.3 -41.0 -41.6 -42.2 -42.6 -43.0 -43.4 

-10 38789 38480 38172 37867 37566 37269 36976 36689 36406 36129 35856 35588 35325 35065 34810 34558 34310 34066 33825 

-22.3 -24.4 -26.5 -28.5 -30.5 -32.4 -34.2 -35.8 -37.3 -38.6 -39.7 -40.6 -41.3 -41.9 -42.4 -42.7 -42.9 -43.1 -43.3 

-12 39826 39490 39156 38824 38496 38172 37852 37537 37228 36924 36624 36330 36040 35754 35471 35192 34917 34645 34376 

-23.6 -25.7 -27.7 -29.8 -31.8 -33.8 -35.6 -37.2 -38.6 -39.9 -40.9 -41.7 -42.3 -42.7 -43.0 -43.1 -43.2 -43.1 -43.1 

-14 40916 40557 40199 39842 39489 39140 38795 38455 38120 37791 37467 37147 36832 36521 36214 35910 35609 35310 35016 

-24.8 -26.9 -29.0 -31.1 -33.2 -35.1 -36.9 -38.5 -39.9 -41.1 -42.0 -42.7 -43.2 -43.5 -43.6 -43.5 -43.3 -43.1 -42.9 

-16 42048 41668 41288 40909 40533 40161 39793 39430 39072 38720 38373 38031 37693 37359 37028 36701 36377 36055 35736 

-26.1 -28.2 -30.3 -32.4 -34.4 -36.4 -38.2 -39.7 -41.1 -42.2 -43.1 -43.7 -44.0 -44.1 -44.0 -43.8 -43.5 -43.1 -42.6 

-18 43209 42810 42411 42012 41616 41224 40835 40452 40073 39700 39332 38970 38611 38257 37906 37558 37213 36870 36530 

-27.3 -29.4 -31.5 -33.6 -35.7 -37.6 -39.4 -40.9 -42.2 -43.3 -44.0 -44.5 -44.7 -44.7 -44.5 -44.1 -43.6 -43.0 -42.4 

-20 44388 43973 43557 43141 42727 42317 41910 41509 41112 40721 40335 39954 39578 39205 38836 38470 38107 37747 37388 

-28.5 -30.6 -32.8 -34.9 -36.9 -38.8 -40.5 -42.0 -43.3 -44.2 -44.9 -45.3 -45.4 -45.2 -44.9 -44.3 -43.6 -42.9 -42.2 

-22 45573 45144 44714 44284 43856 43430 43009 42592 42180 41773 41372 40975 40583 40196 39811 39430 39052 38676 38303 

-29.7 -31.9 -34.0 -36.1 -38.1 -40.0 -41.6 -43.1 -44.3 -45.2 -45.8 -46.0 -46.0 -45.8 -45.3 -44.6 -43.8 -42.9 -42.0 

-24 46755 46316 45874 45433 44993 44555 44121 43691 43267 42847 42433 42024 41620 41220 40823 40430 40039 39651 39265 

-31.0 -33.1 -35.2 -37.3 -39.3 -41.1 -42.8 -44.2 -45.3 -46.1 -46.6 -46.8 -46.7 -46.3 -45.7 -44.9 -43.9 -42.9 -41.9 

-26 47928 47480 47030 46580 46131 45684 45240 44801 44366 43937 43513 43094 42680 42270 41864 41462 41062 40664 40268 

-32.2 -34.4 -36.5 -38.6 -40.6 -42.4 -44.0 -45.3 -46.4 -47.1 -47.5 -47.6 -47.4 -46.9 -46.2 -45.3 -44.2 -43.1 -41.9 

-28 49084 48631 48175 47719 47263 46810 46360 45913 45472 45036 44605 44179 43758 43342 42929 42520 42113 41708 41305 

-33.5 -35.7 -37.8 -39.9 -41.9 -43.7 -45.2 -46.5 -47.5 -48.2 -48.6 -48.6 -48.3 -47.7 -46.9 -45.9 -44.7 -43.5 -42.2 

-30 50221 49765 49306 48846 48387 47930 47476 47026 46580 46140 45705 45275 44850 44429 44012 43598 43187 42778 42370 

-34.8 -37.0 -39.2 -41.3 -43.3 -45.1 -46.6 -47.9 -48.8 -49.4 -49.7 -49.7 -49.3 -48.7 -47.8 -46.7 -45.4 -44.1 -42.7 
oIGRF 1980 TOTAL INTENSITY (F) 

LONG -144 -142 -140 -138 -136 -134 -132 -130 -128 -126 -124 -122 -120 -118 -116 -114 -112 -110 -108 

LAT 

0 32592 32520 32453 32393 32339 32291 32249 32213 32182 32158 32140 32127 32120 32118 32122 32130 32142 32157 32174 

-43.3 -44.4 -45.5 -46.5 -47.3 -47.9 -48.3 -48.4 -48.3 -48.0 -47.5 -46.8 -46.0 -45.1 -44.1 -43.0 -42.1 -41.2 -40.5 

-2 32627 32520 32418 32323 32234 32151 32074 32003 31939 31881 31830 31786 31747 31714 31687 31664 31646 31631 31618 

-43.4 -44.4 -45.3 -46.1 -46.7 -47.2 -47.6 -47.7 -47.7 -47.4 -47.0 -46.4 -45.7 -44.8 -43.9 -43.0 -42.1 -41.2 -40.4 

-4 32768 32627 32491 32362 32238 32121 32010 31905 31808 31718 31634 31558 31488 31425 31367 31314 31265 31220 31176 

-43.5 -44.3 -45.0 -45.6 -46.1 -46.5 -46.8 -47.0 -47.0 -46.8 -46.5 -46.0 -45.5 -44.8 -44.0 -43.1 -42.2 -41.4 -40.6 

-6 33017 32842 32674 32510 32353 32202 32058 31921 31791 31669 31554 31447 31346 31252 31164 31081 31002 30926 30852 

-43.5 -44.0 -44.5 -45.0 -45.4 -45.7 -46.0 -46.2 -46.2 -46.2 -46.0 -45.7 -45.3 -44.7 -44.1 -43.3 -42.6 -41.7 -40.9 

-8 33370 33164 32963 32767 32578 32395 32218 32049 31888 31735 31589 31451 31321 31197 31079 30966 30856 30750 30644 

-43.4 -43.7 -44.1 -44.4 -44.7 -44.9 -45.2 -45.4 -45.5 -45.6 -45.5 -45.4 -45.1 -44.7 -44.2 -43.6 -42.9 -42.1 -41.4 

-10 33825 33589 33357 33131 32910 32696 32489 32289 32097 31914 31738 31570 31410 31257 31109 30966 30826 30689 30553 

-43.3 -43.4 -43.6 -43.7 -43.9 -44.1 -44.3 -44.6 -44.7 -44.9 -45.0 -44.9 -44.8 -44.6 -44.2 -43.8 -43.2 -42.5 -41.7 

-12 34376 34111 33850 33595 33345 33101 32865 32636 32415 32202 31998 31801 31612 31429 31252 31079 30910 30742 30574 

-43.1 -43.0 -43.0 -43.1 -43.1 -43.3 -43.5 -43.7 -43.9 -44.1 -44.3 -44.4 -44.5 -44.4 -44.2 -43.8 -43.3 -42.7 -42.0 

-14 35016 34724 34437 34154 33877 33606 33342 33086 32837 32596 32364 32139 31921 31709 31503 31301 31101 30902 30703 

-42.9 -42.6 -42.5 -42.4 -42.3 -42.4 -42.5 -42.8 -43.0 -43.3 -43.6 -43.8 -43.9 -44.0 -43.9 -43.6 -43.3 -42.8 -42.1 

-16 35736 35421 35110 34802 34500 34204 33914 33632 33357 33090 32830 32578 32332 32092 31857 31625 31396 31166 30935 

-42.6 -42.2 -41.9 -41.7 -41.5 -41.5 -41.6 -41.8 -42.0 -42.3 -42.7 -42.9 -43.2 -43.3 -43.4 -43.2 -43.0 -42.6 -42.0 

-18 36530 36194 35860 35531 35206 34887 34574 34267 33968 33675 33390 33111 32838 32571 32307 32046 31786 31526 31263 

-42.4 -41.8 -41.3 -41.0 -40.7 -40.6 -40.6 -40.7 -41.0 -41.3 -41.6 -42.0 -42.3 -42.5 -42.6 -42.6 -42.5 -42.2 -41.8 

-20 37388 37033 36681 36332 35988 35648 35313 34985 34662 34346 34036 33732 33433 33138 32847 32557 32267 31975 31680 

-42.2 -41.4 -40.8 -40.3 -39.9 -39.7 -39.6 -39.7 -39.9 -40.1 -40.5 -40.9 -41.2 -41.5 -41.7 -41.8 -41.8 -41.6 -41.3 

-22 38303 37931 37563 37198 36836 36478 36125 35776 35433 35095 34762 34433 34109 33787 33468 33149 32828 32506 32179 

-42.0 -41.1 -40.3 -39.7 -39.2 -38.8 -38.6 -38.6 -38.7 -39.0 -39.3 -39.7 -40.1 -40.4 -40.7 -40.9 -40.9 -40.9 -40.7 

-24 39265 38881 38499 38120 37743 37369 36999 36633 36271 35912 35557 35206 34857 34509 34162 33814 33465 33111 32752 

-41.9 -40.9 -39.9 -39.1 -38.5 -38.0 -37.7 -37.6 -37.7 -37.9 -38.1 -38.5 -38.9 -39.3 -39.6 -39.9 -40.1 -40.2 -40.2 

-26 40268 39874 39481 39090 38701 38314 37930 37548 37168 36791 36415 36042 35669 35296 34923 34547 34167 33783 33392 

-41.9 -40.8 -39.7 -38.8 -38.0 -37.4 -37.0 -36.8 -36.8 -36.9 -37.1 -37.4 -37.8 -38.2 -38.6 -39.0 -39.3 -39.5 -39.7 

-28 41305 40903 40502 40102 39703 39305 38908 38512 38117 37722 37328 36933 36538 36141 35741 35337 34929 34514 34091 

-42.2 -40.9 -39.7 -38.7 -37.8 -37.1 -36.5 -36.2 -36.1 -36.1 -36.3 -36.6 -36.9 -37.4 -37.8 -38.3 -38.7 -39.1 -39.4 

-30 42370 41963 41556 41149 40742 40335 39927 39519 39109 38699 38287 37872 37455 37035 36610 36179 35742 35298 34844 

-42.7 -41.4 -40.1 -38.9 -37.9 -37.1 -36.4 -36.0 -35.7 -35.7 -35.8 -36.0 -36.4 -36.8 -37.3 -37.9 -38.4 -39.0 -39.5 
...... 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -108 -106 -104 -102 -100 

LAT 

-98 -96 -94 -92 -90 -88 -86 -84 -82 -80 -78 -76 -74 -72 

0 32174 32192 32210 32227 32241 32251 32256 32255 32245 32225 32195 32151 32095 32023 31934 31829 31705 31563 31403 

-40.5 -40.0 -39.8 -39.8 -40.2 -40.9 -41.9 -43.3 -45.0 -46.9 -49.1 -51.5 -54.0 -56.6 -59.3 -62.0 -64.7 -67.3 -69.8 

-2 31618 31606 31594 31581 31566 31547 31523 31493 31456 31411 31356 31290 31213 31122 31018 30899 30766 30616 30452 

-40.4 -39.8 -39.4 -39.2 -39.3 -39.7 -40.5 -41.5 -42.8 -44.4 -46.2 -48.2 -50.4 -52.7 -55.1 -57.5 -60.0 -62.3 -64.6 

-4 31176 31134 31091 31048 31001 30952 30897 30837 30771 30697 30615 30524 30422 30310 30186 30051 29904 29744 29573 

-40.6 -39.9 -39.4 -39.0 -38.9 -39.0 -39.4 -40.1 -41.1 -42.3 -43.8 -45.5 -47.4 -49.4 -51.4 -53.6 -55.7 -57.9 -59.9 

-6 30852 30778 30704 30629 30550 30468 30382 30290 30192 30087 29975 29855 29727 29590 29444 29289 29125 28952 28771 

-40.9 -40.2 -39.5 -39.0 -38.7 -38.6 -38.7 -39.1 -39.8 -40.7 -41.9 -43.2 -44.8 -46.5 -48.3 -50.2 -52.1 -54.0 -55.8 

-8 30644 30539 30433 30325 30214 30099 29979 29853 29721 29584 29439 29288 29131 28966 28795 28617 28433 28244 28050 

-10 

-41.4 -40.6 -39.8 -39.2 -38.7 -38.4 -38.3 -38.4 -38.8 -39.5 -40.3 -41.4 -42.7 -44.2 -45.7 -47.3 -49.0 -50.7 -52.2 

30553 30416 30278 30136 29991 29842 29687 29526 29360 29187 29008 28824 28634 28440 28240 28037 27831 27623 27414 

-41.7 -41.0 -40.2 -39.5 -38.8 -38.4 -38.1 -38.0 -38.2 -38.6 -39.2 -40.1 -41.1 -42.3 -43.6 -45.0 -46.5 -47.9 -49.3 

-12 30574 30405 30234 30059 29879 29695 29504 29307 29105 28896 28682 28462 28239 28012 27783 27552 27321 27092 26865 

-42.0 -41.3 -40.5 -39.7 -39.0 -38.4 -38.0 -37.8 -37.8 -38.0 -38.4 -39.1 -39.9 -40.9 -42.1 -43.3 -44.5 -45.7 -46.8 

-14 30703 30502 30298 30089 29875 29654 29427 29194 28954 28708 28457 28201 27942 27682 27421 27160 26903 26650 26404 

-42.1 -41.4 -40.7 -39.9 -39.2 -38.5 -38.0 -37.7 -37.6 -37.7 -38.0 -38.5 -39.2 -40.0 -41.0 -42.0 -43.0 -44.1 -45.0 

-16 30935 30702 30464 30221 29971 29715 29451 29181 28903 28619 28330 28038 27743 27447 27153 26862 26577 26299 26031 

-42.0 -41.4 -40.7 -40.0 -39.3 -38.6 -38.1 -37.7 -37.5 -37.6 -37.8 -38.2 -38.8 -39.5 -40.3 -41.2 -42.1 -42.9 -43.6 

-18 31263 30997 30726 30448 30163 29870 29570 29262 28946 28624 28298 27968 27636 27305 26977 26654 26340 26036 25745 

-41.8 -41.2 -40.6 -40.0 -39.3 -38.7 -38.2 -37.9 -37.7 -37.7 -37.9 -38.2 -38.8 -39.4 -40.1 -40.9 -41.7 -42.3 -42.8 

-20 31680 31381 31076 30764 30443 30114 29777 29431 29078 28718 28354 27986 27618 27251 26889 26535 26191 25860 25546 

-41.3 -40.9 -40.4 -39.9 -39.4 -38.9 -38.5 -38.2 -38.0 -38.1 -38.3 -38.6 -39.1 -39.7 -40.4 -41.1 -41.7 -42.2 -42.6 

-22 32179 31847 31508 31161 30805 30440 30065 29682 29292 28894 28492 28088 27683 27282 26886 26500 26126 25769 25430 

-40.7 -40.5 -40.2 -39.8 -39.4 -39.1 -38.8 -38.6 -38.6 -38.7 -39.0 -39.4 -39.9 -40.4 -41.1 -41.7 -42.2 -42.6 -42.8 

-24 32752 32387 32014 31632 31240 30839 30429 30009 29581 29147 28708 28268 27828 27392 26964 26547 26144 25760 25397 

-40.2 -40.1 -39.9 -39.8 -39.6 -39.4 -39.3 -39.3 -39.4 -39.7 -40.0 -40.5 -41.0 -41.6 -42.2 -42.7 -43.2 -43.4 -43.5 

-26 33392 32994 32587 32170 31744 31307 30860 30405 29941 29471 28997 28522 28048 27580 27120 26672 26242 25831 25445 

-39.7 -39.8 -39.9 -39.9 -39.9 -40.0 -40.1 -40.3 -40.5 -40.9 -41.4 -41.9 -42.5 -43.1 -43.7 -44.2 -44.6 -44.8 -44.7 

-28 34091 33661 33220 32770 32309 31837 31356 30865 30366 29862 29354 28846 28340 27840 27350 26875 26417 25982 25573 

-39.4 -39.7 -40.0 -40.3 -40.5 -40.8 -41.2 -41.6 -42.0 -42.6 -43.2 -43.8 -44.5 -45.1 -45.7 -46.2 -46.5 -46.6 -46.4 

-30 34844 34381 33908 33425 32930 32425 31909 31385 30854 30317 29777 29237 28701 28172 27655 27153 26670 26212 25781 

-39.5 -40.0 -40.5 -41.0 -41.5 -42.0 -42.6 -43.2 -43.9 -44.6 -45.3 -46.1 -46.8 -47.5 -48.1 -48.6 -48.8 -48.8 -48.5 
~ 

~ 

CD 

LONG 

LAT 

-72 -70 -68 -66 

IGRF 1980 

-64 -62 -60 -58 

TOTAL INTENSITY (F) 

-56 -54 -52 -50 -48 -46 -44 -42 -40 -38 -36 

0 31403 31224 31028 30815 30589 30350 30103 29851 29597 29346 29101 28869 28652 28456 28284 28140 28027 27946 27900 

-69.8 -72.2 -74.4 -76.3 -78.0 -79.3 -80.1 -80.4 -80.2 -79.3 -77.6 -75.3 -72.2 -68.4 -64.0 -59.1 -53.7 -48.1 -42.3 

-2 30452 30272 30079 29873 29656 29431 29200 28966 28734 28508 28290 28087 27900 27736 27597 27485 27405 27357 27344 

-64.6 -66.8 -68.8 -70.6 -72.1 -73.2 -73.9 -74.2 -73.8 -72.8 -71.1 -68.7 -65.7 -62.0 ·-57.7 -53.0 -47.9 -42.7 -37.4 

-4 29573 29390 29197 28995 28786 28572 28356 28141 27930 27727 27537 27362 27206 27073 26966 26887 26839 26824 26841 

-59.9 -61.9 -63.7 -65.3 -66.6 -67.5 -68.1 -68.1 -67.6 -66.4 -64.7 -62.3 -59.2 -55.6 -51.5 -47.0 -42.3 -37.5 -32.6 

-6 28771 28582 28387 28186 27983 27779 27576 27378 27188 27009 26844 26697 26571 26469 26393 26346 26330 26344 26391 

-55.8 -57.5 -59.1 -60.5 -61.5 -62.2 -62.6 -62.4 -61.7 -60.4 -58.5 -56.0 -53.0 -49.5 -45.5 -41.3 -37.0 -32.6 -28.3 

-8 28050 27853 27653 27452 27252 27056 26865 26683 26512 26355 26215 26095 25997 25925 25879 25862 25875 25918 25991 

-52.2 -53.7 -55.1 -56.2 -57.0 -57.4 -57.5 -57.1 -56.1 -54.7 -52.6 -50.1 -47.1 -43.7 -39.9 -36.0 -32.1 -28.2 -24.4 

-10 27414 27205 26998 26795 26597 26406 26225 26057 25904 25767 25651 25557 25486 25442 25424 25435 25474 25543 25640 

-49.3 -50.5 -51.6 -52.4 -52.9 -53.1 -52.9 -52.2 -51.1 -49.4 -47.2 -44.6 -41.6 -38.3 -34.8 -31.2 -27.6 -24.2 -21.1 

-12 26865 26642 26426 26218 26019 25832 25660 25503 25366 25248 25153 25083 25037 25018 25027 25063 25126 25217 25335 

-46.8 -47.8 -48.6 -49.2 -49.5 -49.4 -48.8 -47.9 -46.5 -44.6 -42.3 -39.7 -36.7 -33.5 -30.2 -26.9 -23.8 -20.9 -18.3 

-14 26404 26166 25938 25722 25521 25336 25169 25023 24899 24798 24722 24673 24650 24654 24685 24744 24829 24939 25075 

-16 

-45.0 -45.7 -46.3 -46.6 -46.5 -46.2 -45.4 -44.1 -42.5 -40.4 -38.0 -35.3 -32.4 -29.3 -26.2 -23.3 -20.5 -18.1 -16.1 

26031 25775 25534 25309 25103 24918 24755 24616 24503 24416 24357 24326 24323 24347 24399 24477 24580 24707 24856 

-43.6 -44.2 -44.5 -44.5 -44.2 -43.5 -42.5 -41.0 -39.1 -36.9 -34.3 -31.6 -28.7 -25.7 -22.9 -20.2 -17.9 -15.9 -14.4 

-18 25745 25471 25214 24979 24766 24578 24416 24282 24178 24103 24057 24042 24055 24097 24165 24259 24377 24518 24678 

-42.8 -43.2 -43.2 -43.0 -42.4 -41.5 -40.1 -38.4 -36.3 -33.9 -31.3 -28.5 -25.6 -22.8 -20.2 -17.8 -15.8 -14.2 -13.1 

-20 25546 25251 24978 24730 24508 24316 24153 24022 23923 23856 23822 23818 23845 23900 23983 24090 24219 24370 24539 

-42.6 -42.7 -42.5 -42.1 -41.2 -40.0 -38.4 -36.5 -34.2 -31.7 -28.9 -26.1 -23.2 -20.5 -18.1 -16.0 -14.3 -13.1 -12.4 

-22 25430 25115 24824 24562 24330 24131 23965 23834 23738 23677 23650 23655 23692 23757 23850 23966 24105 24263 24438 

-42.8 -42.7 -42.4 -41.7 -40.6 -39.2 -37.4 -35.2 -32.7 -30.0 -27.2 -24.3 -21.6 -19.0 -16.6 -14.7 -13.3 -12.4 -12.0 

-24 25397 25060 24752 24474 24231 24023 23852 23718 23622 23563 23540 23551 23594 23667 23766 23889 24033 24195 24373 

-43.5 -43.3 -42.7 -41.8 -40.6 -38.9 -36.9 -34.5 -31.9 -29.1 -26.2 -23.3 -20.5 -18.0 -15.8 -14.1 -12.8 -12.1 -12.0 

-26 25~45 25087 24760 24467 24210 23992 23814 23675 23576 23517 23494 23507 23553 23629 23731 23857 24003 24167 24345 

-44.7 -44.3 -43.6 -42.5 -41.0 -39.2 -37.0 -34.5 -31.7 -28.8 -25.8 -22.9 -20.2 -17.7 -15.6 -14.0 -12.9 -12.3 -12.4 

-28 25573 25194 24848 24539 24269 24039 23851 23706 23601 23538 23513 23524 23569 23645 23747 23872 24017 24179 24354 

-46.4 -45.9 -45.0 -43.7 -42.1 -40.1 -37.7 -35.0 -32.2 -29.2 -26.1 -23.2 -20.4 -18.0 -16.0 -14.4 -13.4 -13.0 -13.2 

-30 25781 25382 25018 24693 24408 24166 23967 23812 23699 23629 23598 23605 23645 23716 23814 23936 24076 24233 24403 

-48.5 -47.8 -46.8 -45.4 -43.6 -41.5 -39.0 -36.2 -33.2 -30.1 -27.1 -24.1 -21.4 -18.9 -16.9 -15.4 -14.5 -14.1 -14.4 
'0 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -36 -34 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 

LAT 

0 27900 27889 27912 27969 28059 28178 28324 28494 28684 28891 29112 29344 29586 29835 30089 30349 30613 30879 31148 

-42.3 -36.6 -31.0 -25.6 -20.5 -15.7 -11.4 -7.3 -3.7 -0.3 2.8 5.6 8.2 10.5 12.5 14.1 15.4 16.3 16.6 

-2 27344 27364 27418 27505 27623 27769 27941 28135 28348 28578 28820 29073 29335 29603 29876 30154 30436 30720 31005 

-37.4 -32.1 -27.0 -22.2 -17.7 -13.6 -9.8 -6.3 -3.1 -0.2 2.6 5.1 7.4 9.5 11.4 13.0 14.2 14.9 15.2 

-4 26841 26891 26974 27089 27232 27402 27597 27813 28046 28295 28556 28827 29107 29392 29683 29978 30275 30575 30875 

-32.6 -27.9 -23.5 -19.3 -15.4 -11.9 -8.7 -5.8 -3.1 -0.7 1.7 3.9 6.0 7.9 9.6 11.0 12.1 12.8 12.9 

-6 26391 26469 26578 26716 26882 27074 27287 27521 27772 28037 28313 28600 28894 29194 29500 29809 30121 30435 30748 

-28.3 -24.2 -20.4 -16.9 -13.7 -10.8 -8.3 -6.0 -3.8 -1.8 0.1 2.0 3.8 5.5 7.0 8.3 9.3 9.8 9.8 

-8 25991 26094 26226 26386 26571 26779 27008 27256 27520 27797 28086 28384 28690 29003 29320 29641 29965 30290 30614 

-24.4 -20.9 -17.8 -15.0 -12.5 -10.3 -8.4 -6.7 -5.1 -3.6 -2.1 -0.5 1.0 2.4 3.8 4.9 5.7 6.1 6.0 

-10 25640 25765 25916 26093 26293 26515 26756 27015 27288 27574 27871 28178 28492 28813 29139 29468 29800 30132 30463 

-21.1 -18.2 -15.8 -13.6 -11.8 -10.4 -9.1 -8.0 -6.9 -5.8 -4.8 -3.6 -2.4 -1.2 -0.1 0.8 1.5 1.7 1.4 

-12 25335 25478 25646 25837 26049 26281 26530 26795 27074 27365 27667 27978 28296 28622 28952 29286 29622 29958 30292 

-18.3 -16.1 -14.2 -12.8 -11.7 -10.8 -10.2 -9.6 -9.1 -8.5 -7.8 -7.1 -6.2 -5.3 -4.5 -3.8 -3.3 -3.3 -3.8 

-14 25075 25233 25414 25615 25835 26073 26327 26595 26876 27169 27471 27783 28103 28428 28759 29094 29430 29765 30097 

-16.1 -14.4 -13.2 -12.4 -11.9 -11.7 -11.6 -11.6 -11.6 -11.5 -11.2 -10.8 -10.3 -9.8 -9.2 -8.8 -8.6 -8.8 -9.5 

-16 24856 25027 25217 25426 25652 25892 26147 26415 26695 26986 27286 27595 27911 28233 28561 28891 29222 29552 29877 

-14.4 -13.3 -12.6 -12.4 -12.4 -12.8 -13.2 -13.7 -14.2 -14.6 -14.8 -14.8 -14.7 -14.5 -14.2 -14.1 -14.2 -14.7 -15.6 

-18 24678 24858 25056 25269 25496 25738 25991 26256 26532 26817 27112 27414 27723 28038 28357 28679 29000 29320 29634 

-13.1 -12.5 -12.4 -12.6 -13.2 -14.0 -15.0 -16.0 -16.9 -17.7 -18.3 -18.8 -19.1 -19.2 -19.4 -19.6 -20.1 -20.8 -22.1 

-20 24539 24725 24927 25142 25370 25609 25859 26118 26387 26664 26950 27242 27541 27844 28152 28460 28768 29073 29371 

-12.4 -12.2 -12.4 -13.1 -14.2 -15.4 -16.8 -18.2 -19.6 -20.8 -21.9 -22.8 -23.5 -24.0 -24.6 -25.2 -26.0 -27.1 -28.7 

-22 24438 24628 24831 25046 25271 25506 25750 26002 26261 26528 26802 27082 27367 27656 27947 28239 28529 28815 29094 

-12.0 -12.1 -12.8 -13.8 -15.2 -16.9 -18.6 -20.4 -22.2 -23.8 -25.3 -26.6 -27.8 -28.8 -29.8 -30.8 -32.0 -33.5 -35.4 

-24 24373 24564 24766 24979 25200 25429 25665 25908 26156 26411 26671 26935 27204 27475 27748 28020 28289 28553 28808 

-12.0 -12.4 -13.3 -14.7 -16.4 -18.3 -20.4 -22.6 -24.7 -26.7 -28.6 -30.4 -31.9 -33.4 -34.9 -36.4 -38.0 -39.8 -42.0 

-26 24345 24534 24734 24943 25158 25379 25605 25837 26073 26313 26557 26805 27055 27306 27557 27807 28052 28292 28522 

-12.4 -13.0 -14.1 -15.7 -17.6 -19.8 -22.2 -24.7 -27.1 -29.5 -31.8 -33.9 -36.0 -37.9 -39.8 -41.8 -43.8 -46.1 -48.6 

-28 24354 24540 24735 24937 25144 25356 25572 25791 26013 26238 26465 26694 26923 27153 27381 27606 27827 28040 28244 

-13.2 -13.9 -15.2 -16.9 -19.0 -21.4 -24.0 -26.7 -29.5 -32.2 -34.9 -37.4 -39.9 -42.3 -44.6 -47.0 -49.5 -52.2 -55.1 

-30 24403 24583 24771 24964 25162 25363 25567 25772 25979 26187 26396 26605 26813 27020 27224 27425 27619 27806 27982 

-14.4 -15.2 -16.5 -18.4 -20.6 -23.1 -25.9 -28.8 -31.8 -34.9 -37.9 -40.8 -43.7 -46.5 -49.3 -52.1 -55.0 -58.1 -61.3 
.... 

t..) 

0 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 180 -178 -176 -174 -172 -170 -168 -166 -164 -162 -160 -158 -156 -154 -152 -150 -148 -146 -144 

LAT 

-30 50221 49765 49306 48846 48387 47930 47476 47026 46580 46140 45705 45275 44850 44429 44012 43598 43187 42778 42370 

-34.8 -37.0 -39.2 -41.3 -43.3 -45.1 -46.6 -47.9 -48.8 -49.4 -49.7 -49.7 -49.3 -48.7 -47.8 -46.7 -45.4 -44.1 -42.7 

-32 51336 50879 50420 49959 49500 49041 48586 48135 47688 47246 46809 46377 45950 45528 45109 44693 44280 43868 43457 

-36.2 -38.5 -40.8 -42.9 -44.8 -46.6 -48.1 -49.3 -50.3 -50.8 -51.1 -51.0 -50.6 -49.9 -48.9 -47.8 -46.5 -45.1 -43.6 

-34 52427 51972 51515 51057 50599 50142 49688 49238 48792 48351 47915 47484 47058 46635 46217 45801 45387 44975 44563 

-37.8 -40.1 -42.4 -44.5 -46.5 -48.3 -49.8 -51.0 -51.9 -52.5 -52.7 -52.6 -52.1 -51.4 -50.4 -49.2 -47.9 -46.4 -44.9 

-36 53495 53045 52592 52138 51684 51231 50781 50335 49892 49454 49021 48593 48169 47749 47332 46918 46505 46094 45682 

-39.4 -41.8 -44.2 -46.4 -48.4 -50.1 -51.7 -52.9 -53.8 -54.3 -54.6 -54.4 -54.0 -53.3 -52.3 -51.1 -49.7 -48.3 -46.7 

-38 54541 54097 53651 53203 52755 52309 51865 51424 50987 50554 50126 49702 49282 48865 48452 48041 47630 47220 46810 

-41.2 -43.7 -46.1 -48.3 -50.4 -52.2 -53.7 -55.0 -55.9 -56.5 -56.7 -56.6 -56.2 -55.5 -54.5 -53.3 -52.0 -50.6 -49.0 

-40 55565 55130 54692 54252 53813 53374 52938 52505 52075 51649 51227 50808 50394 49982 49573 49166 48759 48351 47942 

-43.2 -45.7 -48.2 -50.5 -52.6 -54.4 -56.0 -57.3 -58.2 -58.8 -59.1 -59.1 -58.7 -58.1 -57.2 -56.0 -54.8 -53.4 -51.9 

-42 56568 56142 55714 55285 54855 54427 54000 53576 53154 52736 52322 51911 51503 51097 50693 50290 49887 49482 49075 

-45.3 -47.9 -50.4 -52.8 -54.9 -56.8 -58.5 -59.8 -60.8 -61.5 -61.8 -61.8 -61.6 -61.0 -60.2 -59.2 -58.0 -56.6 -55.2 

-44 57548 57134 56718 56300 55882 55465 55049 54635 54223 53815 53409 53005 52604 52205 51807 51409 51009 50608 50204 

-46 

-47.5 -50.3 -52.8 -55.2 -57.4 -59.4 -61.1 -62.5 -63.6 -64.3 -64.7 -64.9 -64.7 -64.2 -63.5 -62.6 -61.6 -60.4 -59.1 

58504 58103 57700 57295 56890 56485 56081 55678 55278 54879 54482 54088 53694 53302 52910 52517 52122 51724 51322 

-50.0 -52.7 -55.4 -57.8 -60.1 -62.1 -63.8 -65.3 -66.5 -67.3 -67.9 -68.1 -68.1 -67.7 -67.2 -66.4 -65.5 -64.5 -63.3 

-48 59432 59046 58657 58266 57875 57483 57092 56702 56312 55924 55538 55152 54767 54382 53996 53608 53218 52823 52424 

-52.5 -55.3 -58.0 -60.5 -62.8 -64.9 -66.7 -68.2 -69.5 -70.4 -71.1 -71.5 -71.6 -71.4 -71.0 -70.5 -69.7 -68.8 -67.9 

-50 60328 59957 59583 59208 58831 58454 58076 57698 57321 56944 56568 56192 55815 55437 55058 54675 54290 53899 53503 

-55.2 -58.0 -60.7 -63.2 -65.5 -67.7 -69.5 -71.2 -72.5 -73.6 -74.4 -74.9 -75.2 -75.2 -75.0 -74.6 -74.1 -73.4 -72.6 

-52 61184 60829 60472 60112 59751 59388 59025 58660 58296 57931 57565 57198 56830 56460 56087 55711 55331 54944 54552 

-57.9 -60.7 -63.4 -65.9 -68.3 -70.4 -72.4 -74.1 -75.5 -76.7 -77.6 -78.3 -78.7 -78.9 -78.9 -78.7 -78.4 -77.9 -77.4 

-54 61991 61654 61314 60971 60625 60278 59929 59579 59227 58874 58519 58162 57803 57441 57076 56706 56331 55950 55561 

-60.7 -63.4 -66.1 -68.6 -70.9 -73.1 -75.1 -76.9 -78.4 -79.7 -80.7 -81.6 -82.2 -82.5 -82.7 -82.8 -82.6 -82.4 -82.0 

-56 62739 62421 62098 61772 61444 61112 60778 60442 60104 59763 59420 59073 58724 58371 58013 57650 57281 56906 56522 

-63.4 -66.1 -68.7 -71.2 -73.5 -75.7 -77.7 -79.5 -81.1 -82.5 -83.6 -84.6 -85.4 -85.9 -86.3 -86.5 -86.6 -86.6 -86.4 

-58 63418 63118 62814 62506 62194 61879 61561 61239 60915 60587 60256 59920 59581 59237 58888 58533 58171 57802 57425 

-66.1 -68.7 -71.2 -73.6 -75.9 -78.1 -80.1 -81.9 -83.5 -85.0 -86.3 -87.3 -88.2 -89.0 -89.5 -89.9 -90.2 -90.4 -90.4 

-60 64014 63734 63448 63159 62865 62566 62264 61958 61648 61333 61015 60691 60363 60029 59690 59344 58990 58629 58260 

-68.7 -71.2 -73.6 -75.9 -78.1 -80.2 -82.2 -84.0 -85.7 -87.2 -88.5 -89.7 -90.7 -91.6 -92.3 -92.9 -93.3 -93.7 -93.9 
t..) 

..... 

LONG 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

IGRF 1980 TOTAL INTENSITY (F) 

36 38 40 42 44 46 48 so 52 54 56 58 60 62 64 66 68 70 72 

30043 30384 30793 31272 31823 32445 33136 33892 34707 35577 36494 37450 38440 39454 40487 41532 42581 43628 44667 

-93.4 -87.5 -80.7 -73.2 -65.3 -57.1 -48.9 -40.8 -33.2 -26.0 -19.5 -13.7 -8.7 -4.4 -0.8 2.0 4.3 6.0 7.2 

29886 30269 30720 31242 31835 32498 33227 34020 34869 35771 36717 37702 38718 39757 40814 41881 42953 44022 45083 

-91.2 -84.7 -77.5 -69.6 -61.4 -53.0 -44.7 -36.7 -29.1 -22.1 -15.8 -10.2 -5.4 -1.4 1.9 4.4 6.2 7.5 8.3 

29826 30250 30742 31303 31934 32633 33396 34219 35097 36025 36995 38002 39037 40096 41171 42255 43344 44430 45508 

-88.8 -81.9 -74.3 -66.2 -57.9 -49.5 -41.2 -33.3 -25.9 -19.1 -13.0 -7.7 -3.2 0.5 3.4 5.5 7.0 7.9 8.2 

29873 30335 30864 31461 32126 32855 33646 34494 35395 36342 37330 38352 39402 40474 41560 42656 43756 44854 45944 

-86.5 -79.3 -11.s -63.3 -55.o -46.7 -38.6 -30.9 -23.7 -11.2 -11.4 -6.4 -2.2 1.1 3.6 5.4 6.5 1.0 6.9 

30034 30531 31093 31721 32413 33167 33980 34847 35763 36724 37723 38755 39812 40891 41984 43086 44191 45294 46391 

-84.6 -77.2 -69.3 -61.2 -53.0 -44.9 -37.0 -29.6 -22.8 -16.6 -11.1 -6.5 -2.7 0.3 2.4 3.9 4.6 4.8 4.4 

30311 30839 31429 32082 32796 33569 34397 35277 36203 37171 38174 39209 40268 41348 42441 43543 44648 45752 46850 

-83.2 -75.8 -68.0 -60.1 -52.1 -44.3 -36.7 -29.7 -23.2 -17.4 -12.4 -8.1 -4.7 -2.0 -0.2 0.9 1.4 1.2 o.s 

-42 30704 31257 31871 32543 33273 34059 34896 35781 36711 37679 38682 39713 40768 41843 42930 44027 45127 46226 47320 

-82.6 -75.3 -67.7 -60.0 -52.4 -44.9 -37.8 -31.2 -25.1 -19.7 -15.1 -11.2 -8.1 -5.8 -4.2 -3.4 -3.2 -3.6 -4.5 

-44 31209 31782 32413 33099 33839 34631 35471 36356 37283 38246 39241 40264 41310 42373 43450 44536 45625 46714 47799 

-82.8 -75.7 -68.5 -61.1 -53.9 -46.9 -40.2 -34.1 -28.5 -23.5 -19.2 -15.7 -12.9 -10.9 -9.6 -9.0 -8.9 -9.5 -10.5 

-46 31819 32408 33050 33743 34487 35280 36117 36997 37915 38867 39850 40859 41889 42937 43998 45067 46141 47215 48285 

-83.9 -77.1 -70.3 -63.4 -56.6 -50.1 -43.9 -38.2 -33.1 -28.5 -24.7 -21.5 -19.0 -17.2 -16.1 -15.7 -15.8 -16.4 -17.5 

-48 32529 33127 33774 34470 35212 35999 36828 37696 38601 39537 40502 41492 42502 43529 44569 45617 46671 47725 48776 

-85.7 -79.4 -73.0 -66.6 -60.4 -54.4 -48.8 -43.6 -38.9 -34.7 -31.2 -28.4 -26.1 -24.6 -23.6 -23.3 -23.5 -24.1 -25.2 

-so 33329 33931 34578 35270 36005 36782 37598 38450 39335 40251 41194 42159 43145 44147 45161 46184 47212 48241 49268 

-88.3 -82.5 -76.6 -70.8 -65.1 -59.6 -54.5 -49.8 -45.5 -41.8 -38.6 -36.1 -34.1 -32.7 -31.8 -31.6 -31.8 -32.4 -33.4 

-52 34213 34813 35455 36138 36861 37623 38420 39251 40114 41004 41920 42858 43814 44786 45770 46763 47762 48762 49760 

-91.4 -86.1 -80.8 -75.5 -70.4 -65.5 -60.9 -56.6 -52.8 -49.5 -46.7 -44.3 -42.5 -41.3 -40.5 -40.2 -40.4 -41.0 -41.9 

-54 35172 35765 36397 37067 37773 38515 39289 40095 40930 41792 42676 43582 44505 45444 46394 47353 48317 49284 50249 

-94.8 -90.1 -85.3 -80.6 -76.1 -71.7 -67.6 -63.9 -60.5 -57.5 -55.0 -52.9 -51.2 -50.1 -49.4 -49.1 -49.1 -49.6 -50.3 

-56 36200 36781 37398 38050 38735 39452 40201 40978 41781 42609 43460 44329 45216 46117 47029 47949 48876 49805 50734 

-98.3 -94.2 -90.0 -85.9 -81.9 -78.1 -74.5 -71.2 -68.2 -65.5 -63.2 -61.4 -59.9 -58.8 -58.1 -57.7 -57.7 -57.9 -58.5 

-58 37290 37855 38453 39082 39742 40432 41150 41894 42663 43454 44266 45097 45943 46802 47673 48552 49436 50324 51212 

-101.8 -98.2 -94.6 -91.0 -87.6 -84.2 -81.1 -78.2 -75.6 -73.2 -71.2 -69.5 -68.1 -67.1 -66.3 -65.9 -65.8 -65.9 -66.2 

-60 38437 38981 39555 40159 40790 41448 42132 42841 43572 44323 45094 45882 46684 47499 48325 49158 49997 50840 51683 

-104.9-101.9 -98.8 -95.8 -92.8 -90.0 -87.3 -84.8 -82.5 -80.4 -78.6 -77.0 -75.8 -74.7 -74.0 -73.5 -73.2 -73.1 -73.2 
_. 

II.) 

II.) 

LONG 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

-42 

-44 

-46 

IGRF 1980 TOTAL INTENSITY (F) 

72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 

44667 45693 46699 47681 48633 49551 50431 51268 52059 52801 53491 54128 54710 55238 55710 56129 56496 56813 57082 

7.2 8.1 8.7 9.1 9.4 9.6 9.9 10.2 10.6 11.0 11.6 12.3 13.1 13.9 14.8 15.6 16.4 17.1 17.7 

45083 46131 47160 48166 49142 50085 50991 51856 52675 53446 54167 54835 55450 56010 56515 56967 57366 57715 58014 

8.3 8.7 8.8 8.6 8.4 8.1 7.8 7.5 7.4 7.4 7.5 7.8 8.1 8.6 9.2 9.9 10.5 11.2 11.8 

45508 46574 47621 48645 49641 50606 51533 52421 53265 54062 54810 55507 56151 56741 57277 57759 58189 58567 58895 

8.2 8.2 7.8 7.2 6.4 5.6 4.8 4.1 3.4 2.9 2.6 2.5 2.5 2.7 3.1 3.6 4.1 4.7 5.3 

45944 47022 48082 49120 50132 51112 52058 52965 53830 54649 55421 56142 56812 57429 57993 58503 58960 59366 59122 

6.9 6.5 5.7 4.6 3.4 2.2 0.9 -0.3 -1.3 -2.2 -2.9 -3.4 -3.6 -3.7 -3.5 -3.2 -2.7 -2.2 -1.5 

46391 47476 48544 49592 50614 51606 52565 53487 54368 55206 55997 56740 57432 58073 58661 59196 59679 60111 60491 

4.4 3.5 2.4 1.0 -0.6 -2.2 -3.8 -5.4 -6.8 -8.0 -9.0 -9.7 -10.2 -10.5 -10.5 -10.3 -9.9 -9.3 -8.6 

46850 47937 49008 50060 51087 52087 53055 53987 54880 55732 56539 57299 58010 58670 59280 59837 60343 60797 61200 

0.5 -0.6 -2.0 -3.7 -5.5 -7.4 -9.3 -11.1 -12.8 -14.3 -15.5 -16.5 -17.2 -17.6 -17.7 -17.6 -17.2 -16.6 -15.8 

47320 48403 49473 50524 51552 52554 53526 54464 55365 56226 57044 57817 58543 59220 59847 60423 60949 61423 61847 

-4.5 -5.8 -7.4 -9.3 -11.3 -13.4 -15.5 -17.5 -19.3 -21.0 -22.3 -23.4 -24.3 -24.8 -25.0 -24.9 -24.5 -23.9 -23.0 

47799 48874 49936 50982 52006 53005 53976 54915 55820 56686 57511 58293 59029 59719 60360 60952 61494 61985 62428 

-10.5 -12.0 -13.7 -15.7 -17.9 -20.0 -22.2 -24.3 -26.2 -27.9 -29.4 -30.5 -31.4 -31.9 -32.1 -32.0 -31.6 -31.0 -30.0 

48285 49347 50397 51432 52447 53439 54405 55341 56243 57110 57937 58724 59467 60165 60816 61420 61975 62481 62939 

-17.5 -19.0 -20.8 -22.8 -24.9 -27.1 -29.3 -31.4 -33.3 -35.0 -36.4 -37.6 -38.4 -38.9 -39.1 -39.0 -38.5 -37.8 -36.8 

-48 48776 49820 50853 51872 52874 53854 54809 55736 56633 57495 58321 59107 59853 60555 61213 61825 62390 62908 63378 

-25.2 -26.7 -28.4 -30.4 -32.4 -34.5 -36.6 -38.5 -40.4 -42.0 -43.4 -44.4 -45.2 -45.7 -45.8 -45.6 -45.1 -44.3 -43.1 

-50 49268 50290 51301 52301 53283 54246 55187 56101 56986 57840 58659 59441 60185 60887 61547 62164 62735 63262 63742 

-33.4 -34.8 -36.4 -38.2 -40.1 -42.0 -43.9 -45.7 -47.4 -48.8 -50.1 -51.0 -51.7 -52.0 -52.1 -51.8 -51.1 -50.2 -49.0 

-52 49760 50754 51740 52714 53674 54615 55536 56432 57302 58142 58950 59724 60461 61159 61817 62434 63009 63540 64028 

-41.9 -43.1 -44.5 -46.0 -47.7 -49.4 -51.1 -52.7 -54.1 -55.4 -56.4 -57.2 -57.7 -57.9 -57.8 -57.4 -56.7 -55.7 -54.4 

-54 50249 51211 52166 53111 54043 54958 55854 56728 57578 58400 59192 59952 60679 61369 62021 62635 63209 63741 64233 

-50.3 -51.3 -52.5 -53.8 -55.2 -56.6 -58.0 -59.3 -60.5 -61.5 -62.3 -62.9 -63.2 -63.2 -63.0 -62.4 -61.6 -60.6 -59.2 

-56 50734 51659 52579 53490 54389 55274 56141 56988 57813 58612 59384 60127 60838 61516 62158 62765 63334 63864 64356 

-58.5 -59.2 -60.1 -61.1 -62.2 -63.3 -64.4 -65.4 -66.3 -67.1 -67.6 -68.0 -68.1 -67.9 -67.5 -66.9 -66.0 -64.8 -63.4 

-58 51212 52097 52978 53851 54713 55562 56396 57212 58007 58780 59527 60248 60939 61600 62229 62824 63384 63909 64398 

-66.2 -66.7 -67.3 -68.0 -68.8 -69.6 -70.3 -71.0 -71.6 -72.0 -72.3 -72.4 -72.3 -72.0 -71.5 -70.7 -69.7 -68.5 -67.1 

-60 51683 52524 53361 54192 55014 55824 56620 57400 58162 58903 59622 60316 60984 61623 62234 62814 63362 63877 64359 

-73.2 -73.4 -73.8 -74.2 -74.6 -75.1 -75.5 -75.9 -76.2 -76.4 -76.4 -76.3 -76.0 -75.5 -74.8 -73.9 -72.9 -71.6 -70.2 
..... 

to.) 

w 

LONG 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

IGRF 1980 TOTAL INTENSITY (F) 

108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 

57082 57308 57492 57638 57748 57827 57877 57899 57897 57870 57821 57750 57659 57546 57413 57260 57087 56894 56682 

17.7 18.2 18.5 18.6 18.5 18.2 17.6 16.9 15.9 14.6 13.2 11.7 10.0 8.2 6.3 4.3 2.3 0.3 -1.6 

58014 58268 58479 58649 58782 58880 58946 58982 58991 58973 58931 58865 58777 58666 58534 58382 58208 58015 57802 

11.8 12.3 12.8 13.0 13.2 13.1 12.9 12.4 11.8 11.0 9.9 8.8 7.4 6.0 4.4 2.8 1.1 -0.6 -2.4 

58895 59176 59412 59606 59760 59878 59960 60011 60031 60023 59988 59928 59843 59735 59605 59453 59281 59087 58875 

5.3 6.0 6.5 7.0 7.4 7.6 7.7 7.6 7.4 6.9 6.3 5.6 4.6 3.6 2.4 1.1 -0.3 -1.7 -3.2 

59722 60029 60289 60506 60681 60817 60916 60981 61013 61015 60989 60935 60855 60751 60624 60474 60302 60110 59898 

-1.5 -0.8 -0.1 0.6 1.2 1.8 2.2 2.5 2.6 2.6 2.4 2.1 1.6 0.9 0.1 -0.8 -1.8 -3.0 -4.2 

60491 60822 61106 61345 61540 61695 61811 61890 61935 61948 61931 61884 61811 61712 61588 61441 61273 61083 60873 

-8.6 -7.8 -6.9 -6.0 -5.1 -4.3 -3.5 -2.9 -2.3 -2.0 -1.7 -1.6 -1.7 -1.9 -2.3 -2.9 -3.6 -4.4 -5.4 

61200 61554 61860 62120 62335 62508 62640 62735 62793 62818 62811 62773 62707 62615 62497 62355 62190 62004 61798 

-15.8 -14.9 -13.9 -12.8 -11.6 -10.5 -9.4 -8.4 -7.5 -6.7 -6.1 -5.6 -5.2 -5.1 -5.1 -5.3 -5.7 -6.2 -6.9 

-42 61847 62221 62548 62827 63061 63252 63401 63511 63584 63622 63626 63599 63542 63457 63347 63211 63053 62872 62671 

-23.0 -22.0 -20.8 -19.5 -18.1 -16.7 -15.4 -14.0 -12.8 -11.6 -10.6 -9.7 -9.0 -8.5 -8.1 -8.0 -8.1 -8.3 -8.8 

-44 62428 62821 63166 63463 63716 63924 64090 64216 64304 64355 64372 64357 64311 64237 64135 64009 63858 63686 63492 

-30.0 -28.9 -27.6 -26.1 -24.5 -22.9 -21.3 -19.6 -18.1 -16.6 -15.2 -14.0 -13.0 -12.1 -11.5 -11.0 -10.8 -10.8 -11.0 

-46 62939 63349 63710 64025 64295 64520 64703 64845 64949 65015 65046 65044 65011 64949 64859 64743 64603 64440 64256 

-36.8 -35.5 -34.1 -32.4 -30.7 -28.9 -27.0 -25.2 -23.3 -21.6 -19.9 -18.5 -17.1 -16.0 -15.0 -14.3 -13.9 -13.6 -13.7 

-48 63378 63802 64178 64509 64794 65036 65236 65394 65514 65596 65643 65656 65637 65589 65512 65409 65282 65131 64959 

-43.1 -41.8 -40.2 -38.5 -36.6 -34.6 -32.6 -30.5 -28.5 -26.5 -24.7 -23.0 -21.4 -20.0 -18.9 -18.0 -17.3 -16.9 -16.7 

-50 63742 64177 64566 64911 65211 65468 65683 65858 65994 66093 66156 66186 66183 66151 66090 66002 65889 65754 65596 

-49.0 -47.6 -45.9 -44.1 -42.1 -40.0 -37.9 -35.7 -33.5 -31.4 -29.4 -27.5 -25.8 -24.3 -22.9 -21.8 -21.0 -20.4 -20.2 

-52 64028 64471 64871 65227 65541 65812 66043 66234 66386 66502 66582 66629 66644 66629 66585 66515 66419 66300 66159 

-54.4 -52.9 -51.2 -49.3 -47.2 -45.1 -42.8 -40.6 -38.3 -36.2 -34.1 -32.1 -30.2 -28.6 -27.2 -26.0 -25.0 -24.3 -24.0 

-54 64233 64682 65090 65456 65781 66065 66310 66516 66684 66817 66915 66980 67013 67017 66992 66940 66864 66763 66641 

-59.2 -57.7 -55.9 -54.0 -51.9 -49.7 -47.5 -45.2 -42.9 -40.7 -38.6 -36.6 -34.7 -33.0 -31.5 -30.3 -29.3 -28.5 -28.0 

-56 64356 64808 65221 65594 65928 66224 66481 66701 66886 67035 67150 67234 67286 67309 67304 67272 67216 67136 67034 

-63.4 -61.9 -60.1 -58.2 -56.1 -53.9 -51.7 -49.5 -47.3 -45.1 -43.0 -41.0 -39.1 -37.4 -35.9 -34.7 -33.6 -32.9 -32.4 

-58 64398 64850 65264 65642 65983 66287 66555 66788 66987 67152 67284 67385 67457 67499 67515 67504 67469 67411 67331 

-67.1 -65.5 -63.8 -61.9 -59.9 -57.8 -55.6 -53.5 -51.3 -49.2 -47.2 -45.2 -43.4 -41.8 -40.4 -39.1 -38.1 -37.4 -36.9 

-60 64359 64807 65220 65600 65944 66255 66532 66775 66986 67165 67314 67432 67522 67584 67620 67631 67617 67581 67524 

-70.2 -68.6 -66.9 -65.1 -63.2 -61.2 -59.1 -57.1 -55.1 -53.1 -51.2 -49.4 -47.7 -46.1 -44.8 -43.6 -42.7 -41.9 -41.5 
!'.) 

,... 

LONG 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

-42 

-44 

-46 

IGRF 1980 TOTAL INTENSITY (F) 

144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 176 1 7 8 180 

56682 56450 56201 55933 55648 55346 55029 54696 54349 53987 53612 53224 52824 52413 51991 51559 51120 50673 50221 

-1.6 -3.5 -5.4 -7.2 -8.9 -10.6 -12.2 -13.9 -15.5 -17.1 -18.8 -20.5 -22.3 -24.2 -26.1 -28.2 -30.4 -32.6 -34.8 

57802 57570 57320 57052 56766 56465 56147 55814 55466 55104 54729 54341 53940 53529 53106 52675 52235 51788 51336 

-2.4 -4.1 -5.8 -7.5 -9.2 -10.8 -12.5 -14.1 -15.8 -17.5 -19.3 -21.1 -23.1 -25.1 -27.2 -29.4 -31.6 -33.9 -36.2 

58875 58643 58392 58124 57839 57538 57221 56889 56542 56181 55807 55420 55021 54611 54190 53761 53322 52878 52427 

-3.2 -4.7 -6.3 -7.9 -9.5 -11.1 -12.7 -14.4 -16.2 -18.0 -19.9 -21.8 -23.9 -26.0 -28.3 -30.6 -33.0 -35.4 -37.8 

59898 59667 59418 59151 58867 58567 58252 57921 57577 57218 56847 56463 56067 55660 55243 54817 54383 53942 53495 

-4.2 -5.5 -6.9 -8.3 -9.9 -11.4 -13.1 -14.8 -16.6 -18.6 -20.5 -22.6 -24.8 -27.1 -29.5 -31.9 -34.4 -36.9 -39.4 

60873 60644 60397 60132 59850 59553 59240 58913 58572 58217 57849 57470 57078 56676 56265 55844 55416 54981 54541 

-5.4 -6.5 -7.7 -9.0 -10.5 -12.0 -13.7 -15.4 -17.3 -19.3 -21.4 -23.6 -25.9 -28.4 -30.9 -33.4 -36.0 -38.6 -41.2 

61798 61572 61328 61067 60789 60496 60187 59865 59528 59178 58816 58442 58057 57662 57257 56844 56424 55997 55565 

-6.9 -7.8 -8.8 -10.0 -11.3 -12.8 -14.5 -16.2 -18.2 -20.2 -22.4 -24.8 -27.2 -29.8 -32.4 -35.1 -37.8 -40.5 -43.2 

62671 62451 62212 61956 61684 61396 61093 60776 60446 60103 59748 59381 59004 58617 58222 57818 57407 56990 56568 

-8.8 -9.4 -10.3 -11.3 -12.6 -14.0 -15.6 -17.4 -19.4 -21.5 -23.8 -26.2 -28.7 -31.4 -34.1 -36.9 -39.7 -42.5 -45.3 

63492 63279 63047 62798 62533 62252 61957 61648 61325 60991 60644 60287 59919 59542 59157 58764 58364 57958 57548 

-11.0 -11.5 -12.2 -13.1 -14.2 -15.6 -17.2 -19.0 -20.9 -23.1 -25.4 -27.9 -30.6 -33.3 -36.1 -39.0 -41.9 -44.7 -47.5 

64256 64052 63830 63590 63334 63062 62776 62477 62164 61840 61504 61157 60801 60436 60062 59681 59294 58901 58504 

-13.7 -13.9 -14.5 -15.3 -16.3 -17.6 -19.1 -20.9 -22.9 -25.1 -27.4 -30.0 -32.6 -35.4 -38.3 -41.2 -44.2 -47.1 -50.0 

-48 64959 64767 64556 64328 64083 63823 63548 63260 62960 62647 62323 61989 61646 61294 60934 60567 60193 59815 59432 

-16.7 -16.8 -17.2 -17.9 -18.9 -20.1 -21.6 -23.3 -25.3 -27.4 -29.8 -32.3 -35.0 -37.9 -40.8 -43.7 -46.7 -49.6 -52.5 

-50 65596 65418 65221 65006 64775 64528 64267 63993 63706 63407 63098 62778 62450 62112 61767 61416 61058 60695 60328 

-20.2 -20.2 -20.4 -21.0 -21.9 -23.0 -24.4 -26.1 -28.0 -30.2 -32.5 -35.0 -37.7 -40.5 -43.4 -46.4 -49.3 -52.3 -55.2 

-52 66159 65997 65817 65618 65403 65172 64927 64668 64397 64115 63821 63518 63205 62885 62556 62221 61880 61534 61184 

-24.0 -23.8 -24.0 -24.5 -25.3 -26.4 -27.7 -29.3 -31.2 -33.3 -35.6 -38.0 -40.7 -43.4 -46.3 -49.2 -52.1 -55.0 -57.9 

-54 66641 66498 66336 66155 65958 65746 65519 65278 65025 64760 64485 64199 63905 63602 63292 62975 62652 62324 61991 

-zs.o -27.9 -zs.o -28.4 -29.1 -30.1 -31.3 -32.9 -34.7 -36.7 -38.9 -41.3 -43.8 -46.5 -49.3 -52.1 -55.0 -57.9 -60.7 

-56 67034 66911 66770 66610 66433 66240 66033 65813 65580 65335 65079 64813 64539 64256 63965 63667 63363 63054 62739 

-32.4 -32.2 -32.2 -32.6 -33.2 -34.1 -35.3 -36.7 -38.4 -40.3 -42.4 -44.7 -47.2 -49.7 -52.4 -55.1 -57.9 -60.7 -63.4 

-58 67331 67230 67110 66972 66817 66647 66462 66263 66051 65828 65593 65349 65095 64833 64563 64286 64002 63713 63418 

-36.9 -36.6 -36.7 -37.0 -37.5 -38.4 -39.5 -40.8 -42.4 -44.2 -46.2 -48.3 -50.6 -53.1 -55.6 -58.2 -60.8 -63.5 -66.1 

-60 67524 67446 67349 67234 67103 66956 66794 66618 66429 66229 66017 65795 65564 65324 65076 64820 64557 64288 64014 

-41.5 -41.2 -41.2 -41.5 -4z.o -42.8 -43.8 -45.o -46.5 -48.1 -5o.o -5z.o -54.2 -56.4 -58.8 -61.2 -63.7 -66.2 -68.7 
"' 01 

IGRF 1980 TOTAL INTENS[TY (F) 

LONG 180 -178 -176 -174 -172 -170 -168 -166 -164 -162 -160 -158 -156 -154 -152 -150 -148 -146 -144 

LAT 

-30 50221 49765 49306 48846 48387 47930 47476 47026 46580 46140 45705 45275 44850 44429 44012 43598 43187 42778 42370 

-34.8 -37.0 -39.2 -41.3 -43.3 -45.1 -46.6 -47.9 -48.8 -49.4 -49.7 -49.7 -49.3 -48.7 -47.8 -46.7 -45.4 -44.1 -42.7 

-32 51336 50879 50420 49959 49500 49041 48586 48135 47688 47246 46809 46377 45950 45528 45109 44693 44280 43868 43457 

-36.2 -38.5 -40.8 -42.9 -44.8 -46.6 -48.1 -49.3 -50.3 -50.8 -51.1 -51.0 -50.6 -49.9 -48.9 -47.8 -46.5 -45.1 -43.6 

-34 52427 51972 51515 51057 50599 50142 49688 49238 48792 48351 47915 47484 47058 46635 46217 45801 45387 44975 44563 

-37.8 -40.1 -42.4 -44.5 -46.5 -48.3 -49.8 -51.0 -51.9 -52.5 -52.7 -52.6 -52.1 -51.4 -50.4 -49.2 -47.9 -46.4 -44.9 

-36 53495 53045 52592 52138 51684 51231 50781 50335 49892 49454 49021 48593 48169 47749 47332 46918 46505 46094 45682 

-39.4 -41.8 -44.2 -46.4 -48.4 -50.1 -51.7 -52.9 -53.8 -54.3 -54.6 -54.4 -54.0 -53.3 -52.3 -51.1 -49.7 -48.3 -46.7 

-38 54541 54097 53651 53203 52755 52309 51865 51424 50987 50554 50126 49702 49282 48865 48452 48041 47630 47220 46810 

-40 

-41.2 -43.7 -46.1 -48.3 -50.4 -52.2 -53.7 -55.0 -55.9 -56.5 -56.7 -56.6 -56.2 -55.5 -54.5 -53.3 -52.0 -50.6 -49.0 

55565 55130 54692 54252 53813 53374 52938 52505 52075 51649 51227 50808 50394 49982 49573 49166 48759 48351 47942 

-43.2 -45.7 -48.2 -50.5 -52.6 -54.4 -56.0 -57.3 -58.2 -58.8 -59.1 -59.1 -58.7 -58.1 -57.2 -56.0 -54.8 -53.4 -51.9 

-42 56568 56142 55714 55285 54855 54427 54000 53576 53154 52736 52322 51911 51503 51097 50693 50290 49887 49482 49075 

-45.3 -47.9 -50.4 -52.8 -54.9 -56.8 -58.5 -59.8 -60.8 -61.5 -61.8 -61.8 -61.6 -61.0 -60.2 -59.2 -58.0 -56.6 -55.2 

-44 57548 57134 56718 56300 55882 55465 55049 54635 54223 53815 53409 53005 52604 52205 51807 51409 51009 50608 50204 

-47.5 -50.3 -52.8 -55.2 -57.4 -59.4 -61.1 -62.5 -63.6 -64.3 -64.7 -64.9 -64.7 -64.2 -63.5 -62.6 -61.6 -60.4 -59.1 

-46 58504 58103 57700 57295 56890 56485 56081 55678 55278 54879 54482 54088 53694 53302 52910 52517 52122 51724 51322 

-5o.o -52.7 -55.4 -57.8 -6o.1 -62.1 -63.8 -65.3 -66.5 -67.3 -67.9 -68.1 -68.1 -67.7 -67.2 -66.4 -65.5 -64.5 -63.3 

-48 59432 59046 58657 58266 57875 57483 57092 56702 56312 55924 55538 55152 54767 54382 53996 53608 53218 52823 52424 

-52.5 -55.3 -58.0 -60.5 -62.8 -64.9 -66.7 -68.2 -69.5 -70.4 -71.1 -71.5 -71.6 -71.4 -71.0 -70.5 -69.7 -68.8 -67.9 

-50 60328 59957 59583 59208 58831 58454 58076 57698 57321 56944 56568 56192 55815 55437 55058 54675 54290 53899 53503 

-55.2 -58.0 -60.7 -63.2 -65.5 -67.7 -69.5 -71.2 -72.5 -73.6 -74.4 -74.9 -75.2 -75.2 -75.0 -74.6 -74.1 -73.4 -72.6 

-52 61184 60829 60472 60112 59751 59388 59025 58660 58296 57931 57565 57198 56830 56460 56087 55711 55331 54944 54552 

-57.9 -60.7 -63.4 -65.9 -68.3 -70.4 -72.4 -74.1 -75.5 -76.7 -77.6 -78.3 -78.7 -78.9 -78.9 -78.7 -78.4 -77.9 -77.4 

-54 61991 61654 61314 60971 60625 60278 59929 59579 59227 58874 58519 58162 57803 57441 57076 56706 56331 55950 55561 

-60.7 -63.4 -66.1 -68.6 -70.9 -73.1 -75.1 -76.9 -78.4 -79.7 -80.7 -81.6 -82.2 -82.5 -82.7 -82.8 -82.6 -82.4 -82.0 

-56 62739 62421 62098 61772 61444 61112 60778 60442 60104 59763 59420 59073 58724 58371 58013 57650 57281 56906 56522 

-63.4 -66.1 -68.7 -71.2 -73.5 -75.7 -77.7 -79.5 -81.1 -82.5 -83.6 -84.6 -85.4 -85.9 -86.3 -86.5 -86.6 -86.6 -86.4 

-58 63418 63118 62814 62506 62194 61879 61561 61239 60915 60587 60256 59920 59581 59237 58888 58533 58171 57802 57425 

-66.1 -68.7 -71.2 -73.6 -75.9 -78.1 -80.1 -81.9 -83.5 -85.0 -86.3 -87.3 -88.2 -89.0 -89.5 -89.9 -90.2 -90.4 -90.4 

-60 64014 63734 63448 63159 62865 62566 62264 61958 61648 61333 61015 60691 60363 60029 59690 59344 58990 58629 58260 

-68.7 -71.2 -73.6 -75.9 -78.1 -80.2 -82.2 -84.0 -85.7 -87.2 -88.5 -89.7 -90.7 -91.6 -92.3 -92.9 -93.3 -93.7 -93.9 
t-.) 

0.. 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -144 -142 -140 -138 -136 -134 -132 -130 -128 -126 -124 -122 -120 -118 -116 -114 -112 -110 -108 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

-42 

-44 

-46 

42370 41963 41556 41149 40742 40335 39927 39519 39109 38699 38287 37872 37455 37035 36610 36179 35742 35298 34844 

-42.7 -41.4 -40.1 -38.9 -37.9 -37.1 -36.4 -36.0 -35.7 -35.7 -35.8 -36.0 -36.4 -36.8 -37.3 -37.9 -38.4 -39.0 -39.5 

43457 43047 42636 42224 41811 41396 40979 40560 40138 39713 39284 38852 38414 37971 37522 37066 36601 36128 35644 

-43.6 -42.2 -40.8 -39.5 -38.4 -37.5 -36.7 -36.2 -35.9 -35.7 -35.8 -36.0 -36.3 -36.8 -37.4 -38.0 -38.6 -39.3 -40.0 

44563 44150 43737 43321 42903 42482 42058 41629 41196 40758 40314 39864 39407 38943 38471 37990 37499 36998 36486 

-44.9 -43.4 -42.0 -40.7 -39.5 -38.4 -37.6 -37.0 -36.6 -36.4 -36.4 -36.5 -36.9 -37.4 -37.9 -38.6 -39.4 -40.2 -41.1 

45682 45269 44853 44435 44014 43588 43156 42719 42276 41826 41368 40902 40428 39944 39450 38946 38431 37905 37366 

-46.7 -45.2 -43.7 -42.3 -41.1 -40.0 -39.1 -38.4 -37.9 -37.7 -37.6 -37.8 -38.1 -38.6 -39.2 -40.0 -40.8 -41.8 -42.8 

46810 46397 45981 45561 45137 44706 44269 43825 43373 42912 42441 41961 41470 40968 40455 39930 39392 38842 38280 

-49.0 -47.5 -46.0 -44.6 -43.3 -42.2 -41.3 -40.6 -40.0 -39.7 -39.7 -39.8 -40.1 -40.6 -41.3 -42.1 -43.0 -44.0 -45.1 

47942 47530 47115 46694 46267 45833 45391 44940 44480 44009 43527 43034 42529 42011 41480 40936 40379 39808 39224 

-51.9 -50.4 -48.9 -47.5 -46.3 -45.1 -44.2 -43.4 -42.9 -42.6 -42.5 -42.6 -42.9 -43.4 -44.1 -44.9 -45.9 -47.0 -48.2 

49075 48665 48249 47828 47399 46962 46516 46060 45592 45113 44621 44117 43599 43067 42521 41961 41387 40798 40196 

-55.2 -53.8 -52.4 -51.1 -49.8 -48.7 -47.8 -47.0 -46.5 -46.2 -46.1 -46.2 -46.5 -47.0 -47.7 -48.5 -49.6 -50.7 -52.0 

50204 49795 49380 48958 48528 48088 47639 47178 46704 46218 45718 45204 44676 44132 43574 43001 42413 41810 41194 

-59.1 -57.8 -56.4 -55.2 -54.0 -53.0 -52.1 -51.3 -50.8 -50.5 -50.4 -50.5 -50.8 -51.3 -52.0 -52.9 -53.9 -55.1 -56.4 

51322 50915 50501 50079 49648 49206 48754 48289 47811 47319 46813 46291 45755 45203 44635 44052 43454 42842 42215 

-63.3 -62.1 -60.9 -59.8 -58.7 -57.8 -56.9 -56.3 -55.8 -55.5 -55.4 -55.5 -55.8 -56.3 -57.0 -57.8 -58.9 -60.0 -61.3 

-48 52424 52019 51606 51184 50753 50310 49856 49389 48907 48412 47901 47375 46832 46275 45701 45112 44508 43889 43256 

-67.9 -66.8 -65.8 -64.8 -63.9 -63.0 -62.3 -61.7 -61.2 -61.0 -60.9 -61.0 -61.3 -61.8 -62.5 -63.3 -64.3 -65.4 -66.6 

-50 53503 53100 52689 52268 51837 51394 50939 50471 49988 49490 48977 48448 47904 47343 46767 46176 45569 44949 44315 

-72.6 -71.8 -70.9 -70.1 -69.3 -68.5 -67.9 -67.4 -67.0 -66.8 -66.8 -66.9 -67.2 -67.7 -68.3 -69.1 -70.0 -71.0 -72.2 

-52 54552 54151 53742 53324 52894 52452 51997 51529 51047 50549 50036 49508 48964 48404 47829 47239 46635 46017 45386 

-77.4 -76.7 -76.1 -75.4 -74.8 -74.2 -73.7 -73.3 -73.0 -72.9 -72.8 -73.0 -73.3 -73.7 -74.3 -75.0 -75.9 -76.8 -77.8 

-54 55561 55164 54758 54342 53915 53476 53023 52558 52077 51583 51073 50548 50008 49452 48882 48298 47699 47088 46465 

-82.0 -81.6 -81.1 -80.7 -80.2 -79.8 -79.4 -79.1 -78.9 -78.8 -78.9 -79.0 -79.3 -79.7 -80.3 -80.9 -81.7 -82.5 -83.4 

-56 56522 56130 55728 55317 54893 54458 54010 53549 53073 52584 52080 51561 51028 50481 49919 49344 48756 48157 47546 

-86.4 -86.2 -86.0 -85.7 -85.4 -85.1 -84.9 -84.7 -84.6 -84.6 -84.7 -84.9 -85.1 -85.5 -86.0 -86.5 -87.2 -87.9 -88.7 

-58 57425 57039 56643 56237 55820 55391 54949 54495 54027 53546 53050 52541 52019 51483 50934 50372 49798 49214 48620 

-90.4 -90.4 -90.4 -90.3 -90.1 -90.0 -89.9 -89.9 -89.9 -89.9 -90.0 -90.2 -90.5 -90.8 -91.2 -91.7 -92.3 ~92.9 -93.5 

-60 58260 57882 57494 57095 56686 56265 55833 55388 54930 54460 53976 53480 52972 52450 51917 51373 50817 50252 49678 

-93.9 -94.1 -94.2 -94.3 -94.3 -94.4 -94.4 -94.4 -94.5 -94.6 -94.8 -95.0 -95.2 -95.6 -95.9 -96.3 -96.7 -97.2 -97.7 
"' ....... 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -108 -106 -104 -102 -100 -98 -96 -94 -92 -90 -88 -86 -84 -82 -80 -78 -76 -74 -72 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

34844 34381 33908 33425 32930 32425 31909 31385 30854 30317 29777 29237 28701 28172 27655 27153 26670 26212 25781 

-39.5 -40.0 -40.5 -41.0 -41.5 -42.0 -42.6 -43.2 -43.9 -44.6 -45.3 -46.1 -46.8 -47.5 -48.1 -48.6 -48.8 -48.8 -48.5 

35644 35151 34646 34130 33603 33066 32519 31963 31400 30833 30263 29695 29131 28576 28033 27506 27001 26521 26070 

-40.0 -40.7 -41.4 -42.2 -42.9 -43.7 -44.5 -45.3 -46.2 -47.0 -47.9 -48.8 -49.6 -50.3 -50.9 -51.3 -51.5 -51.4 -51.0 

36486 35963 35429 34883 34326 33758 33181 32595 32004 31409 30812 30218 29629 29050 28485 27937 27411 26911 26442 

-41.1 -42.0 -42.9 -43.8 -44.8 -45.8 -46.8 -47.8 -48.9 -49.9 -50.9 -51.9 -52.8 -53.5 -54.1 -54.5 -54.6 -54.5 -54.0 

37366 36816 36254 35679 35094 34499 33894 33282 32665 32045 31425 30808 30197 29597 29012 28446 27902 27386 26900 

-42.8 -43.8 -44.9 -46.1 -47.2 -48.4 -49.6 -50.8 -52.0 -53.2 -54.3 -55.4 -56.3 -57.0 -57.6 -58.0 -58.0 -57.8 -57.2 

38280 37705 37117 36518 35908 35287 34659 34024 33384 32742 32102 31465 30837 30219 29618 29036 28477 27947 27447 

-45.1 -46.3 -47.6 -48.9 -50.2 -51.6 -52.9 -54.3 -55.6 -56.9 -58.1 -59.1 -60.1 -60.9 -61.4 -61.7 -61.7 -61.4 -60.7 

39224 38627 38018 37396 36765 36123 35474 34819 34161 33502 32845 32193 31549 30919 30304 29710 29140 28597 28086 

-48.2 -49.5 -50.9 -52.3 -53.8 -55.2 -56.7 -58.2 -59.6 -60.9 -62.1 -63.2 -64.1 -64.9 -65.4 -65.6 -65.6 -65.2 -64.4 

-42 40196 39581 38953 38314 37665 37006 36341 35671 34998 34325 33655 32992 32338 31697 31074 30470 29891 29340 28819 

-52.0 -53.4 -54.8 -56.3 -57.8 -59.4 -60.9 -62.4 -63.8 -65.2 -66.4 -67.5 -68.4 -69.1 -69.5 -69.7 -69.5 -69.0 -68.2 

-44 41194 40564 39923 39270 38607 37936 37259 36577 35894 35213 34535 33864 33204 32557 31928 31319 30734 30177 29650 

-56.4 -57.8 -59.2 -60.8 -62.3 -63.9 -65.4 -66.9 -68.3 -69.6 -70.8 -71.9 -72.7 -73.3 -73.7 -73.7 -73.5 -73.0 -72.1 

-46 42215 41575 40924 40261 39590 38911 38227 37539 36851 36165 35484 34810 34147 33498 32867 32256 31669 31108 30577 

-61.3 -62.7 -64.1 -65.6 -67.1 -68.7 -70.2 -71.6 -73.0 -74.2 -75.3 -76.3 -77.0 -77.5 -77.8 -77.8 -77.5 -76.9 -75.9 

-48 43256 42611 41955 41288 40613 39931 39244 38556 37867 37181 36500 35828 35167 34520 33890 33280 32694 32133 31600 

-66.6 -67.9 -69.3 -70.7 -72.2 -73.6 -75.1 -76.4 -77.7 -78.8 -79.8 -80.6 -81.2 -81.6 -81.8 -81.7 -81.3 -80.6 -79.7 

-50 44315 43669 43012 42346 41672 40992 40308 39623 38939 38257 37582 36915 36260 35618 34994 34389 33806 33248 32716 

-72.2 -73.4 -74.7 -76.0 -77.4 -78.7 -80.0 -81.2 -82.3 -83.3 -84.2 -84.8 -85.3 -85.6 -85.6 -85.4 -85.0 -84.2 -83.2 

-52 45386 44744 44092 43431 42763 42090 41415 40738 40062 39390 38724 38067 37421 36789 36174 35576 35000 34447 33919 

-77.8 -78.9 -80.1 -81.3 -82.5 -83.6 -84.8 -85.8 -86.8 -87.6 -88.3 -88.8 -89.2 -89.3 -89.2 -88.9 -88.4 -87.6 -86.6 

-54 46465 45832 45189 44538 43882 43220 42557 41893 41230 40572 39920 39277 38644 38025 37421 36835 36268 35723 35202 

-83.4 -84.4 -85.4 -86.4 -87.4 -88.4 -89.3 -90.2 -91.0 -91.6 -92.1 -92.5 -92.7 -92.7 -92.5 -92.1 -91.5 -90.7 -89.7 

-56 47546 46925 46296 45661 45019 44374 43727 43080 42436 41795 41161 40534 39919 39315 38727 38154 37600 37066 36553 

-88.7 -89.5 -90.3 -91.2 -92.0 -92.8 -93.5 -94.2 -94.8 -95.3 -95.6 -95.8 -95.9 -95.8 -95.5 -95.0 -94.3 -93.5 -92.5 

-58 48620 48017 47406 46789 46167 45543 44917 44291 43667 43048 42435 41829 41233 40649 40079 39523 38984 38463 37961 

-93.5 -94.1 -94.8 -95.5 -96.1 -96.7 -97.3 -97.8 -98.2 -98.5 -98.6 -98.7 -98.6 -98.4 -98.0 -97.5 -96.8 -96.0 -95.0 

-60 49678 49096 48507 47913 47315 46715 46113 45512 44913 44319 43730 43148 42575 42013 41463 40927 40405 39900 39413 

-97.7 -98.2 -98.7 -99.2 -99.7-100.1-100.5-100.8-101.0-101.1-101.2-101.1-100.9-100.6-100.1 -99.6 -98.9 -98.0 -97.1 
"-J 

00 

LONG 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

-42 

-44 

-46 

IGRF 1980 TOTAL INTENSITY (F) 

-72 -70 -68 -66 -64 -62 -60 -58 -56 -54 -52 -so -48 -46 -44 -42 -40 -38 -36 

25781 25382 25018 24693 24408 24166 23967 23812 23699 23629 23598 23605 23645 23716 23814 23936 24076 24233 24403 

-48.5 -47.8 -46.8 -45.4 -43.6 -41.5 -39.0 -36.2 -33.2 -30.1 -27.1 -24.1 -21.4 -18.9 -16.9 -15.4 -14.5 -14.1 -14.4 

26070 25652 25271 24930 24630 24374 24163 23996 23873 23793 23754 23752 23784 23847 23938 24052 24185 24334 24495 

-51.0 -50.3 -49.1 -47.6 -45.7 -43.4 -40.8 -37.9 -34.9 -31.7 -28.6 -25.6 -22.9 -20.5 -18.5 -17.0 -16.1 -15.8 -16.0 

26442 26007 25610 25253 24938 24668 24443 24263 24128 24035 23983 23970 23991 24043 24122 24225 24347 24484 24634 

-54.0 -53.1 -51.8 -50.2 -48.2 -45.8 -43.1 -40.2 -37.1 -33.9 -30.8 -27.8 -25.1 -22.6 -20.7 -19.2 -18.3 -17.9 -18.2 

26900 26449 26037 25665 25335 25051 24811 24617 24467 24359 24293 24265 24271 24308 24373 24461 24568 24691 24827 

-57.2 -56.2 -54.9 -53.2 -51.1 -48.6 -45.9 -42.9 -39.8 -36.6 -33.5 -30.5 -27.8 -25.4 -23.4 -21.9 -21.0 -20.6 -20.8 

27447 26982 26556 26170 25826 25527 25272 25062 24896 24772 24688 24642 24631 24650 24697 24767 24857 24962 25081 

-60.7 -59.7 -58.2 -56.4 -54.3 -51.8 -49.0 -46.1 -43.0 -39.8 -36.7 -33.8 -31.1 -28.7 -26.7 -25.3 -24.3 -23.9 -24.1 

28086 27609 27170 26771 26414 26100 25830 25603 25420 25278 25175 25109 25078 25076 25102 25151 25220 25305 25403 

-64.4 -63.3 -61.8 -60.0 -57.8 -55.3 -52.6 -49.6 -46.6 -43.5 -40.4 -37.6 -34.9 -32.6 -30.6 -29.1 -28.2 -27.7 -27.9 

28819 28333 27884 27473 27103 26775 26489 26246 26044 25883 25759 25672 25618 25594 25596 25622 25667 25729 25804 

-68.2 -67.1 -65.5 -63.7 -61.5 -59.0 -56.3 -53.4 -50.5 -47.5 -44.5 -41.7 -39.2 -36.9 -35.0 -33.6 -32.6 -32.1 -32.2 

29650 29156 28698 28277 27895 27554 27253 26993 26773 26591 26446 26336 26258 26209 26186 26186 26206 26243 26293 

-72.1 -70.9 -69.3 -67.5 -65.3 -62.9 -60.3 -57.5 -54.6 -51.7 -48.9 -46.2 -43.8 -41.6 -39.8 -38.4 -37.5 -37.1 -37.1 

30577 30078 29613 29184 28792 28438 28123 27847 27608 27406 27239 27105 27002 26927 26878 26852 26845 26855 26878 

-75.9 -74.7 -73.1 -71.3 -69.2 -66.8 -64.3 -61.7 -58.9 -56.2 -53.5 -51.0 -48.7 -46.7 -45.0 -43.7 -42.8 -42.4 -42.5 

-48 31600 31098 30629 30193 29792 29428 29099 28807 28551 28329 28140 27982 27855 27754 27678 27624 27589 27571 27568 

-79.7 -78.4 -76.9 -75.1 -73.0 -70.8 -68.4 -65.9 -63.3 -60.8 -58.3 -56.0 -53.8 -51.9 -50.4 -49.2 -48.4 -48.0 -48.1 

-50 32716 32214 31741 31301 30893 30519 30179 29873 29599 29358 29149 28969 28816 28690 28587 28506 28444 28399 28368 

-83.2 -82.0 -80.5 -78.7 -76.8 -74.7 -72.4 -70.1 -67.7 -65.4 -63.1 -61.0 -59.0 -57.3 -55.9 -54.9 -54.2 -53.9 -54.0 

-52 33919 33418 32946 32503 32090 31709 31358 31039 30751 30493 30263 30062 29886 29735 29607 29500 29411 29339 29281 

-86.6 -85.3 -83.9 -82.2 -80.4 -78.4 -76.3 -74.2 -72.0 -69.9 -67.9 -66.0 -64.2 -62.7 -61.5 -60.6 -60.0 -59.8 -60.0 

-54 35202 34705 34234 33791 33375 32988 32630 32300 31999 31725 31479 31257 31061 30887 30735 30603 30489 30392 30309 

-89.7 -88.5 -87.1 -85.5 -83.8 -82.0 -80.1 -78.1 -76.2 -74.3 -72.5 -70.8 -69.3 -68.0 -66.9 -66.2 -65.7 -65.6 -65.9 

-56 36553 36063 35597 35155 34739 34349 33985 33648 33336 33049 32787 32549 32334 32140 31966 31812 31675 31554 31449 

-92.5 -91.3 -90.0 -88.5 -87.0 -85.3 -83.6 -81.9 -80.2 -78.5 -76.9 -75.5 -74.2 -73.1 -72.2 -71.6 -71.3 -71.3 -71.6 

-58 37961 37481 37021 36584 36170 35780 35413 35070 34750 34454 34179 33927 33696 33485 33293 33119 32962 32821 32695 

-95.0 -93.9 -92.6 -91.3 -89.9 -88.4 -86.9 -85.3 -83.8 -82.4 -81.1 -79.8 -78.8 -77.9 -77.2 -76.7 -76.5 -76.6 -76.9 

-60 39413 38944 38494 38064 37655 37267 36900 36555 36230 35927 35644 35381 35137 34912 34705 34515 34342 34184 34040 

-97.1 -96.1 -94.9 -93.7 -92.5 -91.1 -89.8 -88.5 -87.2 -86.0 -84.9 -83.9 -83.0 -82.3 -81.8 -81.4 -81.3 -81.5 -81.9 
...., 

-o 

LONG 

LAT 

-30 

-32 

-34 

-36 

-38 

-40 

IGRF 1980 TOTAL INTENSITY (F) 

-36 -34 -32 -30 -28 -26 -24 -2 2 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 

24403 24583 24771 24964 25162 25363 25567 25772 25979 26187 26396 26605 26813 27020 27224 27425 27619 27806 27982 

-14.4 -15.2 -16.5 -18.4 -zo.6 -23.1 -25.9 -28.8 -31.8 -34.9 -37.9 -40.8 -43.7 -46.5 -49.3 -52.1 -55.o -58.1 -61.3 

24495 24666 24844 25027 25214 25403 25593 25784 25974 26165 26354 26543 26730 26914 27094 27269 27437 27598 27749 

-16.0 -16.9 -18.2 -20.1 -22.4 -25.1 -28.0 -31.1 -34.3 -37.6 -40.9 -44.2 -47.4 -50.7 -53.9 -57.1 -60.4 -63.8 -67.3 

24634 24794 24960 25130 25304 25479 25654 25829 26003 26175 26345 26513 26678 26839 26996 27147 27291 27427 27554 

-18.2 -19.0 -20.4 -22.2 -24.6 -27.3 -30.3 -33.5 -36.9 -40.4 -44.0 -47.6 -51.2 -54.8 -58.4 -62.0 -65.7 -69.4 -73.1 

24827 24972 25123 25279 25438 25597 25756 25914 26070 26224 26375 26522 26666 26806 26940 27068 27190 27304 27409 

-20.8 -21.6 -23.o -24.8 -21.2 -29.9 -32.9 -36.3 -39.8 -43.5 -47.3 -51.1 -55.o -58.9 -62.9 -66.8 -70.7 -74.7 -78.7 

25081 25208 25343 25481 25623 25765 25906 26046 26184 26319 26451 26579 26703 26822 26935 27043 27144 27239 27327 

-24.1 -24.8 -26.1 -27.9 -30.2 -32.9 -36.0 -39.4 -43.0 -46.9 -50.8 -54.9 -59.0 -63.2 -67.4 -71.5 -75.7 -79.9 -84.0 

25403 25511 25626 25745 25867 25991 26114 26235 26354 2~471 26583 26692 26797 26897 26992 27082 27167 27246 27319 

-27.9 -28.6 -29.8 -31.6 -33.8 -36.5 -39.6 -43.0 -46.7 -50.6 -54.7 -58.9 -63.1 -67.5 -71.9 -76.2 -80.6 -84.8 -89.0 

-42 25804 25890 25983 26081 26182 26285 26388 26490 26591 26688 26783 26874 26961 27044 27123 27198 27269 27335 27399 

-32.2 -32.9 -34.1 -35.8 -38.0 -40.6 -43.6 -47.0 -50.7 -54.7 -58.8 -63.1 -67.5 -71.9 -76.4 -80.9 -85.3 -89.6 -93.8 

-44 26293 26354 26423 26499 26578 26659 26742 26824 26905 26984 27061 27135 27206 27275 27340 27402 27462 27520 27577 

-37.1 -37.7 -38.9 -40.5 -42.6 -45.2 -48.2 -51.5 -55.2 -59.1 -63.2 -67.5 -71.9 -76.4 -80.9 -85.4 -89.8 -94.1 -98.3 

-46 26878 26914 26958 27009 27065 27124 27185 27247 27309 27370 27430 27489 27545 27601 27655 27707 27760 27812 27866 

-42.5 -43.0 -44.1 -45.7 -47.8 -50.2 -53.1 -56.4 -60.0 -63.8 -67.9 -72.1 -76.5 -80.9 -85.4 -89.8 -94.2 -98.4-102.4 

-48 27568 27577 27595 27621 27653 27690 27729 27771 27814 27858 27902 27946 27990 28034 28078 28124 28171 28220 28273 

-48.1 -48.7 -49.8 -51.3 -53.2 -55.6 -58.4 -61.6 -65.1 -68.8 -72.7 -76.9 -81.1 -85.4 -89.8 -94.1 -98.3-102.3-106.1 

-50 28368 28350 28342 28343 28351 28365 28383 28405 28430 28457 28486 28516 28549 28583 28620 28660 28704 28753 28808 

-54.0 -54.6 -55.6 -57.1 -59.0 -61.3 -63.9 -66.9 -70.3 -73.8 -77.6 -81.6 -85.7 -89.8 -93.9 -98.0-102.0-105.8-109.4 

-52 29281 29237 29204 29180 29165 29157 29154 29157 29164 29175 29190 29209 29231 29257 29288 29324 29367 29416 29473 

-60.0 -60.6 -61.6 -63.0 -64.8 -67.0 -69.5 -72.3 -75.5 -78.9 -82.4 -86.2 -90.0 -93.9 -97.8-101.6-105.3-108.9-112.2 

-54 30309 30240 30182 30136 30098 30069 30047 30031 30022 30018 30020 30028 30041 30060 30086 30119 30161 30211 30272 

-65.9 -66.5 -67.5 -68.8 -70.5 -72.6 -74.9 -77.6 -80.5 -83.7 -87.0 -90.5 -94.1 -97.7-101.3-104.8-108.2-111.5-114.5 

-56 31449 31357 31277 31209 31150 31102 31061 31029 31005 30988 30978 30976 30981 30994 31015 31046 31087 31139 31202 

-71.6 -72.2 -73.1 -74.4 -76.0 -78.0 -80.2 -82.6 -85.3 -88.2 -91.3 -94.5 -97.7-101.0-104.3-107.5-110.6-113.5-116.2 

-58 32695 32583 32483 32395 32319 32252 32196 32149 32111 32082 32061 32050 32048 32056 32074 32102 32142 32195 32261 

-76.9 -77.6 -78.5 -79.7 -81.2 -83.0 -85.0 -87.2 -89.7 -92.3 -95.1 -98.0-100.9-103.9-106.8-109.6-112.4-115.0-117.4 

-60 34040 33910 33794 33689 33597 33515 33445 33385 33335 33295 33266 33247 33239 33241 33256 33282 33321 33374 33442 

-81.9 -82.5 -83.4 -84.5 -85.9 -87.5 -89.3 -91.4 -93.6 -95.9 -98.4-100.9-103.5-106.1-108.7-111.2-113.7-115.9-118.1 
LONG 

LAT 

-60 

-62 

-64 

-66 

-68 

-70 

-72 

-74 

-76 ... 

w 

0 

-78 

-80 

-82 

-84 

-86 

-88 

-90 

IGRF 1980 TOTAL INTENSITY (F) 

0 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 

33442 33525 33625 33743 33880 34038 34216 34418 34644 34895 35172 35477 35810 36172 36564 36986 37439 37923 38437 

-118.1-120.0-121.6-123.0-124.1-124.8-125.2-125.3-125.0-124.3-123.3-121.9-120.2-118.2-115.9-113.4-110.7-107.9-104.9 

34736 34820 34922 35041 35180 35339 35519 35721 35946 36195 36469 36769 37096 37449 37830 38239 38676 39141 39634 

-118.2-119.8-121.2-122.4-123.3-124.0-124.4-124.4-124.2-123.6-122.8-121.7-120.3-118.6-116.7-114.7-112.4-110.0-107.6 

36133 36217 36318 36437 36574 36732 36910 37109 37330 37574 37842 38133 38449 38790 39156 39548 39965 40408 40876 

-117.8-119.2-120.4-121.4-122.2-122.8-123.1-123.2-123.0-122.6-121.9-121.0-119.9-118.6-117.1-115.4-113.6-111.6-109.6 

37621 37703 37801 37918 38053 38206 38379 38573 38787 39023 39280 39560 39862 40187 40535 40906 41300 41717 42158 

-116.9-118.1-119.1-120.0-120.6-121.1-121.4-121.6-121.5-121.2-120.7-120.0-119.1-118.1-116.9-115.5-114.1-112.5-110.9 

39186 39265 39360 39473 39602 39750 39916 40101 40306 40530 40774 41039 41324 41630 41957 42305 42673 43063 43472 

-115.6-116.6-117.5-118.2-118.7-119.2-119.5-119.6-119.5-119.3-119.0-118.5-117.8-117.0-116.1-115.1-113.9-112.7-111.4 

40816 40891 40981 41088 41211 41351 41508 41682 41875 42085 42314 42561 42827 43112 43415 43737 44077 44436 44813 

-114.0-114.8-115.5-116.1-116.6-116.9-117.2-117.3-117.3-117.2-116.9-116.6-116.1-115.5-114.8-114.0-113.1-112.2-111.2 

42496 42566 42651 42750 42865 42995 43142 43304 43482 43677 43888 44116 44360 44621 44899 45193 45503 45829 46172 

-112.1-112.7-113.3-113.7-114.1-114.4-114.6-114.7-114.8-114.7-114.5-114.3-113.9-113.5-113.0-112.4-111.8-111.1-110.3 

44212 44276 44354 44446 44551 44671 44805 44953 45116 45293 45485 45691 45912 46148 46398 46662 46941 47233 47540 

-110.0-110.5-110.9-111.2-111.5-111.8-111.9-112.0-112.0-112.0-111.9-111.7-111.5-111.1-110.8-110.3-109.9-109.3-108.8 

45948 46006 46077 46160 46255 46363 46483 46616 46762 46920 47091 47275 47471 47680 47901 48135 48380 48638 48906 

-107.7-108.1-108.4-108.6-108.8-109.0-109.1-109.2-109.2-109.2-109.1-108.9-108.8-108.5-108.2-107.9-107.6-107.2-106.7 

47690 47742 47805 47878 47962 48057 48163 48279 48407 48545 48694 48854 49024 49205 49396 49598 49809 50030 50261 

-105.4-105.6-105.8-106.0-106.1-106.2-106.3-106.3-106.3-106.3-106.2-106.1-105.9-105.8-105.5-105.3-105.0-104.7-104.4 

49423 49468 49522 49585 49658 49739 49829 49928 50036 50154 50279 50414 50558 50710 50870 51039 51215 51400 51592 

-103.0-103.1-103.2-103.3-103.4-103.4-103.5-103.5-103.4-103.4-103.3-103.2-103.1-103.0-102.8-102.6-102.4-102.1-101.9 

51132 51170 51215 51267 51327 51393 51467 51548 51636 51731 51833 51942 52058 52180 52309 52444 52585 52733 52886 

-100.7-100.7-100.8-100.8-100.8-100.8-100.8-100.8-100.7-100.7-100.6-100.5-100.4-100.3-100.1 -99.9 -99.8 -99.6 -99.4 

52803 52833 52868 52908 52954 53005 53062 53124 53191 53263 53340 53423 53510 53602 53699 53800 53906 54017 54131 

-98.4 -98.4 -98.4 -98.4 -98.4 -98.4 -98.3 -98.3 -98.2 -98.1 -98.1 -98.0 -97.9 -97.8 -97.7 -97.5 -97.4 -97.2 -97.1 

54421 54441 54466 54494 54525 54560 54599 54641 54686 54735 54787 54842 54900 54962 55027 55094 55165 55238 553J4 

-96.3 -96.3 -96.3 -96.2 -96.2 -96.1 -96.1 -96.0 -96.0 -95.9 -95.9 -95.8 -95.7 -95.6 -95.5 -95.4 -95.3 -95.2 -95.1 

55971 55982 55995 56009 56025 56043 56063 56084 56107 56132 56158 56186 56215 56246 56278 56312 56347 56383 56421 

-94.4 -94.3 -94.3 -94.3 -94.2 -94.2 -94.2 -94.1 -94.1 -94.1 -94.0 -94.0 -93.9 -93.9 -93.8 -93.8 -93.7 -93.6 -93.6 

57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
.... 

w 

.... 

LONG 

LAT 

-60 

-62 

-64 

-66 

-68 

IGRF 1980 TOTAL INTENSITY (F) 

36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 

38437 38981 39555 40159 40790 41448 42132 42841 43572 44323 45094 45882 46684 47499 48325 49158 49997 50840 51683 

-104.9-101.9 -98.8 -95.8 -92.8 -90.0 -87.3 -84.8 -82.5 -80.4 -78.6 -77.0 -75.8 -74.7 -74.0 -73.5 -73.2 -73.1 -73.2 

39634 40154 40701 41275 41874 42498 43145 43815 44505 45214 45940 46682 47438 48205 48983 49768 50558 51352 52147 

-107.6-105.0-102.5 -99.9 -97.4 -95.0 -92.7 -90.6 -88.6 -86.8 -85.1 -83.7 -82.5 -81.6 -80.8 -80.2 -79.8 -79.5 -79.4 

40876 41369 41886 42427 42992 43578 44185 44813 45459 46123 46802 47496 48202 48920 49646 50379 51118 51860 52604 

-109.6-107.5-105.4-103.3-101.2 -99.2 -97.3 -95.4 -93.7 -92.1 -90.7 -89.4 -88.3 -87.3 -86.5 -85.9 -85.3 -84.9 -84.6 

42158 42620 43104 43610 44137 44683 45249 45832 46432 47048 47679 48322 48976 49641 50314 50993 51678 52366 53055 

-110.9-109.2-107.5-105.8-104.1-102.4-100.8 -99.3 -97.8 -96.4 -95.2 -94.0 -93.0 -92.0 -91.2 -90.5 -89.8 -89.3 -88.8 

43472 43902 44351 44819 45306 45810 46331 46869 47421 47987 48566 49157 49757 50367 50985 51608 52236 52868 53501 

-111.4-110.1-108.8-107.4-106.0-104.6-103.3-102.0-100.8 -99.6 -98.4 -97.4 -96.4 -95.5 -94.7 -93.9 -93.2 -92.6 -92.0 

-70 44813 45207 45619 46048 46493 46953 47428 47918 48420 48935 49461 49998 50543 51097 51657 52223 52793 53366 53941 

-111.2-110.2-109.1-108.0-106.9-105.8-104.7-103.6-102.6-101.6-100.6 -99.6 -98.7 -97.9 -97.1 -96.3 -95.6 -94.9 -94.2 

-72 46172 46529 46902 47290 47691 48106 48534 48974 49426 49889 50361 50842 51331 51827 52329 52837 53347 53861 54376 

-110.3-109.5-108.7-107.8-106.9-106.0-105.1-104.2-103.4-102.5-101.6-100.8-100.0 -99.2 -98.4 -97.6 -96.9 -96.2 -95.5 

-74 47540 47859 48191 48536 48894 49262 49642 50032 50432 50842 51259 51684 52116 52555 52998 53445 53896 54350 54805 

-108.8-108.1-107.5-106.8-106.1-105.4-104.7-103.9-103.2-102.5-101.7-101.0-100.3 -99.5 -98.8 -98.1 -97.4 -96.7 -96.0 

-76 48906 49187 49478 49779 50091 50413 50744 51084 51432 51787 52150 52519 52894 53274 53658 54046 54437 54830 55224 

-106.7-106.3-105.8-105.2-104.7-104.1-103.5-102.9-102.3-101.7-101.1-100.4 -99.8 -99.1 -98.5 -97.8 -97.2 -96.5 -95.9 

-78 50261 50501 50751 51009 51275 51549 51831 52120 52416 52718 53026 53339 53657 53979 54305 54633 54964 55298 55632 

-104.4-104.0-103.6-103.2-102.8-102.3-101.9-101.4-100.9-100.4 -99.8 -99.3 -98.7 -98.2 -97.6 -97.1 -96.5 -95.9 -95.3 

-80 51592 51792 51999 52213 52433 52660 52893 53132 53376 53625 53879 54136 54398 54663 54931 55201 55473 55747 56022 

-101.9-101.6-101.3-101.0-100.6-100.3 -99.9 -99.5 -99.1 -98.7 -98.3 -97.8 -97.4 -96.9 -96.5 -96.0 -95.5 -95.0 -94.5 

-82 52886 53046 53210 53380 53555 53735 53920 54109 54302 54498 54699 54902 55108 55317 55528 55741 55955 56171 56388 

-99.4 -99.2 -98.9 -98.7 -98.4 -98.1 -97.9 -97.6 -97.2 -96.9 -96.6 -96.3 -95.9 -95.5 -95.2 -94.8 -94.4 -94.1 -93.7 

-84 54131 54250 54373 54499 54629 54763 54900 55039 55182 55328 55476 55626 55778 55932 56088 56245 56403 56562 56722 

-97.1 -96.9 -96.7 -96.6 -96.4 -96.2 -95.9 -95.7 -95.5 -95.3 -95.0 -94.8 -94.5 -94.3 -94.0 -93.7 -93.5 -93.2 -92.9 

-86 55314 55392 55473 55557 55642 55730 55820 55912 56006 56102 56199 56297 56397 56498 56600 56703 56806 56911 57015 

-95.1 -95.0 -94.9 -94.7 -94.6 -94.5 -94.3 -94.2 -94.0 -93.9 -93.7 -93.6 -93.4 -93.3 -93.1 -92.9 -92.8 -92.6 -92.4 

-88 56421 56460 56500 56541 56583 56627 56671 56716 56763 56809 56857 56906 56955 57004 57054 57105 57156 57207 57258 

-93.6 -93.5 -93.5 -93.4 -93.3 -93.3 -93.2 -93.1 -93.0 -93.0 -92.9 -92.8 -92.7 -92.7 -92.6 -92.5 -92.4 -92.4 -92.3 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
.... 

(,.) 

"' 

LONG 

LAT 

-60 

-62 

-64 

-66 

-68 

-70 

-72 

-74 

-76 

IGRF 1980 TOTAL INTENSITY (F) 

72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 

51683 52524 53361 54192 55014 55824 56620 57400 58162 58903 59622 60316 60984 61623 62234 62814 63362 63877 64359 

-73.2 -73.4 -73.8 -74.2 -74.6 -75.1 -75.5 -75.9 -76.2 -76.4 -76.4 -76.3 -76.0 -75.5 -74.8 -73.9 -72.9 -71.6 -70.2 

52147 52940 53731 54516 55293 56060 56814 57555 58279 58985 59670 60334 60974 61588 62177 62737 63269 63771 64242 

-79.4 -79.4 -79.4 -79.6 -79.7 -79.9 -80.0 -80.1 -80.1 -80.0 -79.8 -79.5 -79.0 -78.4 -77.6 -76.6 -75.5 -74.2 -72.8 

52604 53347 54087 54823 55552 56272 56981 57678 58361 59027 59676 60305 60913 61499 62061 62598 63110 63594 64051 

-84.6 -84.4 -84.2 -84.1 -84.0 -83.9 -83.7 -83.5 -83.3 -83.0 -82.6 -82.1 -81.4 -80.7 -79.8 -78.8 -77.6 -76.4 -75.0 

53055 53744 54431 55115 55792 56463 57124 57774 58412 59035 59644 60235 60807 61360 61892 62402 62890 63353 63792 

-88.8 -88.4 -88.0 -87.7 -87.4 -87.0 -86.7 -86.3 -85.8 -85.3 -84.7 -84.1 -83.3 -82.5 -81.5 -80.5 -79.4 -78.1 -76.8 

53501 54134 54765 55394 56017 56635 57245 57846 58435 59013 59578 60127 60661 61178 61676 62156 62615 63054 63471 

-92.0 -91.4 -90.9 -90.4 -89.9 -89.4 -88.9 -88.3 -87.7 -87.1 -86.4 -85.6 -84.8 -83.9 -82.9 -81.9 -80.8 -79.6 -78.4 

53941 54516 55090 55662 56229 56792 57348 57897 58436 58966 59484 59989 60481 60958 61420 61865 62293 62703 63095 

-94.2 -93.5 -92.9 -92.3 -91.7 -91.0 -90.4 -89.7 -89.0 -88.3 -87.5 -86.7 -85.8 -84.9 -83.9 -82.9 -81.9 -80.8 -79.7 

54376 54892 55407 55920 56430 56936 57437 57931 58418 58897 59366 59824 60272 60707 61129 61537 61931 62309 62672 

-95.5 -94.8 -94.1 -93.4 -92.7 -92.0 -91.3 -90.6 -89.8 -89.1 -88.3 -87.4 -86.6 -85.7 -84.8 -83.8 -82.9 -81.9 -80.9 

54805 55260 55715 56169 56620 57069 57513 57952 58385 58811 59229 59639 60039 60430 60809 61178 61534 61878 62208 

-96.0 -95.3 -94.6 -93.9 -93.2 -92.5 -91.8 -91.0 -90.3 -89.5 -88.7 -87.9 -87.1 -86.3 -85.4 -84.6 -83.7 -82.8 -82.0 

55224 55619 56014 56408 56801 57190 57577 57960 58337 58710 59076 59435 59787 60131 60467 60793 61109 61415 61711 

-95.9 -95.2 -94.6 -93.9 -93.2 -92.5 -91.8 -91.1 -90.4 -89.7 -89.0 -88.3 -87.5 -86.8 -86.1 -85.3 -84.6 -83.8 -83.1 

-78 55632 55967 56302 56636 56969 57300 57629 57955 58277 58595 58909 59217 59519 59815 60104 60386 60660 60926 61184 

-95.3 -94.7 -94.1 -93.5 -92.9 -92.3 -91.7 -91.1 -90.5 -89.8 -89.2 -88.6 -87.9 -87.3 -86.7 -86.0 -85.4 -84.8 -84.2 

-80 56022 56297 56573 56848 57122 57396 57667 57936 58203 58466 58726 58982 59234 59481 59722 59959 60189 60413 60631 

-94.5 -94.0 -93.5 -93.0 -92.5 -92.0 -91.5 -91.0 -90.4 -89.9 -89.4 -88.9 -88.4 -87.8 -87.3 -86.8 -86.3 -85.8 -85.4 

-82 56388 56605 56822 57039 57256 57472 57687 57900 58111 58320 58527 58730 58931 59128 59322 59511 59696 59877 60053 

-93.7 -93.3 -92.9 -92.5 -92.1 -91.7 -91.3 -90.9 -90.5 -90.1 -89.7 -89.3 -88.9 -88.5 -88.1 -87.7 -87.4 -87.0 -86.7 

-84 56722 56882 57043 57203 57363 57523 57682 57840 57996 58152 58305 58457 58607 58754 58899 59041 59180 59317 59450 

-92.9 -92.6 -92.4 -92.1 -91.8 -91.5 -91.2 -90.9 -90.6 -90.4 -90.1 -89.8 -89.5 -89.3 -89.0 -88.8 -88.5 -88.3 -88.0 

-86 57015 57120 57226 57331 57436 57541 57645 57749 57852 57955 58056 58156 58255 58353 58449 58544 58637 58728 58817 

-92.4 -92.2 -92.1 -91.9 -91.7 -91.5 -91.4 -91.2 -91.0 -90.9 -90.7 -90.5 -90.4 -90.2 -90.1 -89.9 -89.8 -89.6 -89.5 

-88 57258 57310 57362 57413 57465 57517 57568 57619 57670 57721 57771 57820 57870 57918 57966 58013 58059 58105 58149 

-92.3 -92.2 -92.1 -92.0 -92.0 -91.9 -91.8 -91.7 -91.7 -91.6 -91.5 -91.4 -91.4 -91.3 -91.2 -91.2 -91.1 -91.1 -91.0 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
w 

w 

LONG 

LAT 

-60 

-62 

-64 

-66 

-68 

-70 

IGRF 1980 TOTAL INTENSITY (F) 

108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 

64359 64807 65220 65600 65944 66255 66532 66775 66986 67165 67314 67432 67522 67584 67620 67631 67617 67581 67524 

-70.2 -68.6 -66.9 -65.1 -63.2 -61.2 -59.1 -57.1 -55.1 -53.1 -51.2 -49.4 -47.7 -46.1 -44.8 -43.6 -42.7 -41.9 -41.5 

64242 64682 65091 65469 65814 66128 66411 66663 66884 67076 67238 67373 67480 67561 67616 67648 67656 67642 67607 

-72.8 -71.3 -69.7 -67.9 -66.1 -64.2 -62.3 -60.4 -58.6 -56.7 -55.o -53.3 -51.8 -50.4 -49.1 -48.0 -47.2 -46.5 -46.1 

64051 64481 64881 65253 65596 65911 66196 66453 66683 66884 67059 67207 67329 67427 67501 67552 67581 67589 67577 

-75.0 -73.6 -72.0 -70.4 -68.7 -67.0 -65.2 -63.5 -61.8 -60.2 -58.6 -57.1 -55.7 -54.4 -53.3 -52.4 -51.6 -51.0 -50.6 

63792 64206 64595 64958 65295 65606 65891 66151 66384 66593 66777 66936 67072 67184 67275 67344 67392 67420 67428 

-76.8 -75.5 -74.0 -72.5 -11.0 -69.4 -67.9 -66.3 -64.8 -63.4 -62.o -60.7 -59.4 -58.3 -57.4 -56.6 -55.9 -55.4 -55.0 

63471 63867 64240 64590 64917 65221 65502 65760 65995 66207 66396 66564 66710 66834 66939 67023 67088 67134 67162 

-78.4 -77.1 -75.8 -74.4 -73.0 -71.7 -70.3 -69.0 -67.6 -66.4 -65.2 -64.1 -63.0 -62.1 -61.3 -60.6 -60.0 -59.6 -59.3 

63095 63468 63821 64155 64469 64762 65035 65287 65519 65731 65923 66095 66248 66381 66496 66593 66671 66733 66778 

-79.7 -78.5 -77.3 -76.1 -74.9 -73.7 -72.6 -71.4 -70.3 -69.2 -68.2 -67.3 -66.4 -65.6 -65.0 -64.4 -63.9 -63.6 -63.4 

-72 62672 63019 63349 63662 63958 64236 64497 64740 64966 65173 65363 65536 65692 65830 65952 66057 66146 66220 66278 

-80.9 -79.8 -78.8 -77.8 -76.7 -75.7 -74.7 -73.7 -72.8 -71.9 -71.1 -70.3 -69.6 -69.0 -68.5 -68.0 -67.7 -67.4 -67.3 

-74 62208 62525 62829 63118 63392 63652 63897 64126 64341 64540 64724 64894 65048 65187 65311 65421 65517 65599 65667 

-82.0 -81.1 -80.2 -79.3 -78.4 -77.6 -76.8 -76.0 -75.2 -74.5 -73.9 -73.2 -72.7 -72.2 -71.8 -71.4 -71.2 -71.0 -70.9 

-76 61711 61995 62268 62529 62779 63016 63241 63453 63652 63839 64013 64174 64323 64458 64581 64692 64790 64876 64950 

-83.1 -82.3 -81.6 -80.9 -80.1 -79.5 -78.8 -78.2 -77.6 -77.0 -76.5 -76.0 -75.6 -75.2 -74.9 -74.7 -74.5 -74.3 -74.3 

-78 61184 61433 61673 61903 62124 62335 62536 62727 62907 63077 63237 63385 63524 63651 63768 63875 63971 64056 64131 

-84.2 -83.6 -83.0 -82.4 -81.9 -81.3 -80.8 -80.3 -79.9 -79.4 -79.1 -78.7 -78.4 -78.1 -77.9 -77.7 -77.6 -77.5 -77.4 

-80 60631 60842 61046 61243 61432 61614 61787 61953 62110 62260 62400 62533 62657 62772 62878 62976 63066 63146 63218 

-85.4 -84.9 -84.5 -84.0 -83.6 -83.2 -82.8 -82.4 -82.1 -81.8 -81.5 -81.3 -81.0 -80.9 -80.7 -80.6 -80.5 -80.4 -80.4 

-82 60053 60224 60390 60551 60706 60855 60998 61135 61266 61391 61510 61621 61727 61825 61917 62002 62081 62152 62217 

-86.7 -86.3 -86.0 -85.7 -85.4 -85.1 -84.8 -84.6 -84.3 -84.1 -83.9 -83.7 -83.6 -83.5 -83.4 -83.3 -83.2 -83.2 -83.2 

-84 59450 59579 59705 59827 59946 60060 60170 60276 60378 60475 60567 60655 60738 60816 60890 60958 61022 61080 61134 

-88.0 -87.8 -87.6 -87.4 -87.2 -87.0 -86.8 -86.6 -86.5 -86.4 -86.2 -86.1 -86.0 -85.9 -85.9 -85.8 -85.8 -85.8 -85.8 

-86 58817 58903 58988 59071 59150 59228 59303 59375 59445 59511 59575 59636 59693 59748 59799 59848 59893 59935 59973 

-89.5 -89.3 -89.2 -89.1 -89.0 -88.9 -88.8 -88.7 -88.6 -88.5 -88.5 -88.4 -88.3 -88.3 -88.3 -88.2 -88.2 -88.2 -88.2 

-88 58149 58193 58235 58277 58317 58356 58394 58431 58466 58500 58533 58564 58594 58622 58649 58674 58698 58720 58740 

-91.0 -91.0 -90.9 -90.8 -90.8 -90.8 -90.7 -90.7 -90.6 -90.6 -90.6 -90.6 -90.5 -90.5 -90.5 -90.5 -90.5 -90.5 -90.5 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
~ 

LONG 

LAT 

-60 

·-62 

-64 

-66 

-68 

-70 

-72 

-74 

-76 

IGRF 1980 TOTAL INTENSITY (F) 

144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 176 178 180 

67524 67446 67349 67234 67103 66956 66794 66618 66429 66229 66017 65795 65564 65324 65076 64820 64557 64288 64014 

-41.5 -41.2 -41.2 -41.5 -42.0 -42.8 -43.8 -45.0 -46.5 -48.1 -50.0 -52.0 -54.2 -56.4 -58.8 -61.2 -63.7 -66.2 -68.7 

67607 67553 67480 67389 67281 67158 67020 66868 66704 66527 66339 66141 65933 65716 65490 65257 65016 64768 64514 

-46.1 -45.8 -45.8 -46.1 -46.5 -47.2 -48.2 -49.3 -50.6 -52.2 -53.8 -55.7 -57.7 -59.8 -62.0 -64.2 -66.5 -68.8 -71.2 

67577 67545 67495 67428 67345 67246 67133 67006 66866 66713 66550 66376 66191 65998 65795 65585 65366 65140 64908 

-50.6 -50.4 -50.4 -50.6 -51.1 -51.7 -52.5 -53.6 -54.8 -56.1 -57.7 -59.3 -61.1 -63.0 -65.0 -67.1 -69.2 -71.3 -73.5 

67428 67419 67392 67348 67288 67213 67124 67022 66906 66778 66639 66489 66329 66159 65980 65793 65597 65393 65182 

-55.0 -54.9 -54.9 -55.1 -55.5 -56.1 -56.8 -57.7 -58.8 -60.0 -61.4 -62.9 -64.5 -66.2 -68.0 -69.8 -71.7 -73.6 -75.6 

67162 67173 67167 67145 67108 67056 66990 66911 66819 66715 66600 66474 66338 66191 66036 65871 65698 65516 65327 

-59.3 -59.2 -59.2 -59.4 -59.8 -60.3 -61.0 -61.8 -62.7 -63.8 -65.0 -66.3 -67.7 -69.2 -70.7 -72.4 -74.1 -75.8 -77.5 

66778 66806 66819 66817 66800 66770 66726 66669 66600 66519 66426 66323 66210 66086 65954 65812 65661 65502 65334 

-63.4 -63.3 -63.4 -63.6 -63.9 -64.3 -64.9 -65.6 -66.4 -67.3 -68.4 -69.5 -70.7 -72.0 -73.3 -74.8 -76.2 -77.7 -79.2 

66278 66322 66350 66365 66367 66355 66330 66294 66245 66185 66114 66033 65941 65840 65729 65609 65480 65342 65196 

-67.3 -67.2 -67.3 -67.5 -67.7 -68.1 -68.6 -69.2 -69.9 -70.7 -71.5 -72.5 -73.5 -74.6 -75.8 -77.0 -78.2 -79.5 -80.8 

65667 65722 65763 65792 65808 65812 65805 65785 65755 65714 65662 65601 65529 65448 65358 65258 65150 65033 64908 

-70.9 -70.9 -70.9 -71.1 -71.3 -71.7 -72.1 -72.6 -73.1 -73.8 -74.5 -75.3 -76.1 -77.0 -78.0 -79.0 -80.0 -81.1 -82.1 

64950 65011 65062 65100 65128 65145 65150 65146 65131 65106 65071 65027 64973 64911 64839 64759 64671 64574 64469 

-74.3 -74.3 -74.4 -74.5 -74.7 -75.0 -75.3 -75.7 -76.2 -76.7 -77.3 -77.9 -78.6 -79.3 -80.1 -80.9 -81.7 -82.5 -83.4 

-78 64131 64196 64251 64296 64331 64356 64372 64378 64375 64364 64343 64313 64276 64229 64175 64112 64042 63964 63878 

-77.4 -77.5 -77.5 -77.6 -77.8 -78.0 -78.3 -78.6 -79.0 -79.4 -79.8 -80.3 -80.8 -81.4 -82.0 -82.6 -83.3 -83.9 -84.6 

-80 63218 63282 63337 63384 63422 63452 63474 63488 63494 63492 63482 63465 63440 63407 63368 63321 63267 63206 63138 

-80.4 -80.4 -80.5 -80.6 -80.7 -80.9 -81.1 -81.3 -81.6 -81.9 -82.2 -82.6 -83.0 -83.4 -83.8 -84.3 -84.8 -85.3 -85.8 

-82 62217 62275 62326 62371 62408 62439 62464 62481 62492 62497 62495 62486 62472 62451 62423 62390 62351 62305 62254 

-83.2 -83.2 -83.2 -83.3 -83.4 -83.5 -83.7 -83.8 -84.0 -84.2 -84.4 -84.7 -85.0 -85.3 -85.6 -85.9 -86.2 -86.6 -86.9 

-84 61134 61182 61225 61263 61296 61324 61347 61365 61378 61385 61388 61386 61378 61366 61349 61327 61301 61269 61233 

-85.8 -85.8 -85.8 -85.8 -85.9 -86.0 -86.1 -86.2 -86.3 -86.4 -86.6 -86.7 -86.9 -87.1 -87.3 -87.5 -87.7 -87.9 -88.2 

-86 59973 60008 60040 60068 60093 60115 60133 60147 60159 60166 60171 60172 60169 60163 60154 60141 60125 60106 60083 

-88.2 -88.2 -88.2 -88.2 -88.3 -88.3 -88.4 -88.4 -88.5 -88.5 -88.6 -88.7 -88.8 -88.9 -89.0 -89.1 -89.2 -89.4 -89.5 

-88 58740 58759 58776 58792 58805 58817 58828 58836 58843 58848 58851 58853 58853 58851 58847 58842 58835 58826 58815 

-90.5 -90.5 -90.5 -90.5 -90.5 -90.5 -90.5 -90.5 -90.6 -90.6 -90.6 -90.6 -90.7 -90.7 -90.8 -90.8 -90.9 -90.9 -91.0 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
w 

01 

IGRF 1980 TOTAL INTENSITY (F) 

LONG 180 -178 -176 -174 -172 -170 -168 -166 -164 -162 -160 -158 -156 -154 -152 -150 -148 -146 -144 

LAT 

-60 

-62 

-64 

-66 

64014 63734 63448 63159 62865 62566 62264 61958 61648 61333 61015 60691 60363 60029 59690 59344 58990 58629 58260 

-68.7 -71.2 -73.6 -75.9 -78.1 -80.2 -82.2 -84.0 -85.7 -87.2 -88.5 -89.7 -90.7 -91.6 -92.3 -92.9 -93.3 -93.7 -93.9 

64514 64255 63989 63718 63442 63162 62876 62586 62290 61990 61685 61374 61058 60736 60407 60071 59728 59377 59017 

-71.2 -73.5 -75.7 -77.9 -80.1 -82.1 -84.0 -85.8 -87.4 -89.0 -90.4 -91.6 -92.7 -93.7 -94.5 -95.2 -95.8 -96.3 -96.8 

64908 64669 64423 64172 63915 63652 63384 63110 62830 62545 62254 61958 61654 61345 61028 60704 60373 60033 59685 

-73.5 -75.6 -77.7 -79.8 -81.7 -83.7 -85.5 -87.2 -88.9 -90.4 -91.8 -93.0 -94.2 -95.3 -96.2 -97.0 -97.7 -98.4 -98.9 

65182 64964 64739 64508 64270 64026 63775 63519 63256 62987 62712 62430 62142 61846 61543 61233 60916 60590 60255 

-75.6 -77.5 -79.4 -81.3 -83.2 -85.0 -86.7 -88.3 -89.9 -91.4 -92.7 -94.0 -95.2 -96.3 -97.3 -98.2 -99.0 -99.7-100.3 

-68 65327 65130 64926 64715 64497 64272 64041 63802 63557 63305 63047 62782 62509 62230 61943 61648 61346 61036 60718 

-77.5 -79.2 -81.0 -82.7 -84.3 -86.0 -87.6 -89.1 -90.6 -92.0 -93.3 -94.5 -95.7 -96.8 -97.8 -98.7 -99.6-100.3-101.0 

-70 65334 65159 64976 64785 64587 64382 64170 63951 63724 63491 63251 63003 62749 62487 62218 61941 61657 61365 61066 

-79.2 -80.7 -82.3 -83.8 -85.3 -86.8 -88.2 -89.6 -90.9 -92.2 -93.5 -94.6 -95.7 -96.8 -97.8 -98.7 -99.5-100.3-101.1 

-72 65196 65042 64880 64710 64533 64348 64156 63957 63750 63537 63316 63088 62853 62610 62361 62104 61840 61569 61290 

-80.8 -82.1 -83.4 -84.7 -86.0 -87.3 -88.6 -89.8 -91.0 -92.2 -93.3 -94.4 -95.4 -96.4 -97.3 -98.2 -99.0 -99.8-100.5 

-74 64908 64775 64634 64485 64329 64165 63994 63815 63629 63437 63237 63030 62816 62595 62367 62132 61891 61642 61387 

-82.1 -83.2 -84.4 -85.5 -86.6 -87.7 -88.8 -89.8 -90.9 -91.9 -92.9 -93.9 -94.8 -95.7 -96.5 -97.3 -98.1 -98.8 -99.5 

-76 64469 64356 64236 64108 63972 63830 63680 63522 63358 63187 63010 62825 62634 62436 62232 62021 61804 61581 61351 

-83.4 -84.3 -85.2 -86.1 -87.0 -88.0 -88.9 -89.8 -90.6 -91.5 -92.4 -93.2 -94.0 -94.8 -95.5 -96.2 -96.9 -97.6 -98.2 

-78 63878 63785 63685 63577 63462 63341 63213 63078 62936 62788 62634 62473 62306 62133 61954 61770 61579 61383 61181 

-84.6 -85.3 -86.0 -86.7 -87.5 -88.2 -88.9 -89.7 -90.4 -91.1 -91.8 -92.5 -93.1 -93.8 -94.4 -95.0 -95.6 -96.2 -96.7 

-80 63138 63064 62983 62895 62801 62701 62595 62482 62364 62240 62110 61974 61833 61686 61534 61377 61215 61047 60875 

-85.8 -86.3 -86.8 -87.4 -87.9 -88.5 -89.0 -89.6 -90.2 -90.7 -91.2 -91.8 -92.3 -92.8 -93.3 -93.8 -94.3 -94.8 -95.2 

-82 62254 62197 62135 62067 61993 61914 61829 61740 61645 61545 61440 61330 61216 61097 60973 60845 60713 60577 60436 

-86.9 -87.3 -87.7 -88.1 -88.5 -88.9 -89.3 -89.7 -90.1 -90.5 -90.9 -91.3 -91.7 -92.1 -92.4 -92.8 -93.2 -93.5 -93.9 

-84 61233 61192 61147 61098 61043 60985 60922 60855 60784 60709 60630 60548 60461 60371 60277 60179 60078 59974 59867 

-88.2 -88.4 -88.6 -88.9 -89.2 -89.4 -89.7 -90.0 -90.2 -90.5 -90.8 -91.0 -91.3 -91.6 -91.8 -92.1 -92.3 -92.6 -92.8 

-86 60083 60058 60029 59997 59961 59923 59882 59838 59790 59740 59688 59632 59574 59513 59450 59384 59316 59246 59173 

-89.5 -89.6 -89.8 -89.9 -90.0 -90.2 -90.3 -90.5 -90.7 -90.8 -91.0 -91.1 -91.3 -91.4 -91.6 -91.8 -91.9 -92.1 -92.2 

-88 58815 58803 58789 58774 58757 58738 58717 58696 58672 58647 58621 58593 58564 58533 58501 58468 58434 58398 58361 

-91.0 -91.0 -91.1 -91.1 -91.2 -91.2 -91.3 -91.4 -91.4 -91.5 -91.6 -91.6 -91.7 -91.8 -91.8 -91.9 -92.0 -92.1 -92.1 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
IGRF 1980 TOTAL INTENSITY (F) 

LONG -144 -142 -140 -138 -136 -134 -132 -130 -128 -126 -124 -122 -120 -118 -116 -114 -112 -110 -108 

LAT 

-60 58260 57882 57494 57095 56686 56265 55833 55388 54930 54460 53976 53480 52972 52450 51917 51373 50817 50252 49678 

-93.9 -94.1 -94.2 -94.3 -94.3 -94.4 -94.4 -94.4 -94.5 -94.6 -94.8 -95.0 -95.2 -95.6 -95.9 -96.3 -96.7 -97.2 -97.7 

-62 59017 58648 58270 57881 57482 57073 56651 56219 55774 55318 54850 54369 53878 53375 52861 52337 51804 51261 50711 

-96.8 -97.1 -97.4 -97.6 -97.8 -97.9 -98.1 -98.3 -98.4 -98.6 -98.8 -99.0 -99.2 -99.5 -99.8-100.1-100.5-100.8-101.2 

-64 59685 59328 58962 58586 58200 57803 57396 56979 56550 56111 55661 55200 54728 54247 53756 53256 52747 52231 51707 

-98.9 -99.4 -99.8-100.1-100.4-100.7-101.0-101.2-101.4-101.7-101.9-102.1-102.4-102.6-102.9-103.1-103.4-103.7-103.9 

-66 60255 59912 59561 59199 58829 58449 58059 57659 57249 56830 56401 55962 55514 55057 54591 54118 53637 53149 52656 

-100.3-100.9-101.4-101.9-102.3-102.6-103.0-103.3-103.6-103.8-104.1-104.3-104.6-104.8-105.0-105.2-105.4-105.6-105.8 

-68 60718 60392 60057 59713 59361 59000 58630 58250 57862 57466 57060 56646 56224 55795 55357 54913 54463 54007 53545 

-101.0-101.7-102.3-102.8-103.3-103.7-104.1-104.4-104.8-105.1-105.3-105.6-105.8-106.0-106.2-106.4-106.6-106.7-106.8 

-70 61066 60758 60443 60119 59788 59448 59101 58745 58381 58010 57631 57245 56851 56451 56045 55632 55215 54792 54365 

-101.1-101.7-102.4-102.9-103.4-103.9-104.3-104.7-105.1-105.4-105.7-106.0-106.2-106.4-106.6-106.8-106.9-107.0-107.1 

-72 61290 61004 60711 60410 60102 59787 59465 59135 58798 58455 58105 57749 57386 57018 56644 56266 55883 55496 55105 

-100.5-101.2-101.8-102.4-102.9-103.4-103.9-104.3-104.6-105.0-105.3-105.5-105.8-106.0-106.2-106.3-106.4-106.5-106.6 

-74 61387 61125 60856 60581 60299 60010 59715 59414 59107 58794 58475 58151 57822 57487 57149 56806 56459 56109 55756 

-99.5-100.2-100.8-101.3-101.8-102.3-102.8-103.2-103.5-103.9-104.2-104.5-104.7-104.9-105.1-105.2-105.3-105.4-105.5 

-76 61351 61115 60874 60626 60372 60113 59848 59578 59302 59022 58736 58446 58152 57854 57552 57246 56937 56626 56312 

w -98.2 -98.8 -99.3 -99.9-100.3-100.8-101.2-101.6-102.0-102.3-102.6-102.9-103.1-103.3-103.5-103.6-103.7-103.8-103.9 

~ 

-78 61181 60973 60761 60543 60320 60092 59859 59622 59380 59134 58884 58631 58373 58113 57849 57582 57313 57042 56768 

-96.7 -97.2 -97.7 -98.2 -98.6 -99.0 -99.4 -99.8-100.1-100.4-100.7-100.9-101.2-101.4-101.5-101.7-101.8-101.9-102.0 

-80 60875 60698 60517 60331 60141 59947 59748 59546 59340 59131 58918 58702 58483 58262 58038 57812 57584 57354 57122 

-95.2 -95.6 -96.0 -96.4 -96.8 -97.2 -97.5 -97.8 -98.1 -98.4 -98.6 -98.9 -99.1 -99.3 -99.5 -99.6 -99.8 -99.9-100.0 

-82 60436 60292 60144 59992 59836 59677 59515 59350 59181 59010 58837 58661 58482 58302 58119 57935 57749 57562 57374 

-93.9 -94.2 -94.5 -94.9 -95.1 -95.4 -95.7 -96.0 -96.2 -96.5 -96.7 -96.9 -97.1 -97.3 -97.4 -97.6 -97.7 -97.9 -98.0 

-84 59867 59757 59643 59527 59408 59286 59162 59036 58907 58776 58643 58509 58372 58234 58095 57954 57812 57670 57526 

-92.8 -93.1 -93.3 -93.6 -93.8 -94.0 -94.2 -94.4 -94.6 -94.8 -95.0 -95.1 -95.3 -95.5 -95.6 -95.7 -95.9 -96.0 -96.1 

-86 59173 59098 59021 58942 58862 58779 58695 58609 58521 58432 58342 58250 58158 58064 57969 57874 57777 57681 57583 

-92.2 -92.4 -92.5 -92.7 -92.8 -93.0 -93.1 -93.3 -93.4 -93.5 -93.6 -93.8 -93.9 -94.0 -94.1 -94.2 -94.3 -94.4 -94.5 

-88 58361 58323 58284 58244 58203 58161 58118 58074 58030 57984 57938 57892 57844 57797 57748 57700 57651 57601 57552 

-92.1 -92.2 -92.3 -92.3 -92.4 -92.5 -92.6 -92.6 -92.7 -92.8 -92.8 -92.9 -93.0 -93.0 -93.1 -93.1 -93.2 -93.3 -93.3 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
LONG 

LAT 

-60 

-62 

-64 

-66 

-68 

-70 _. 

(.,) 

....... 

-72 

-74 

-76 

-78 

-so 

-82 

-84 

-86 

-88 

-90 

IGRF 1980 TOTAL INTENSITY (F) 

-108 -106 -104 -102 -100 -98 -96 -94 -92 -90 -88 -86 -84 -82 -so -78 -76 -74 -72 

49678 49096 48507 47913 47315 46715 46113 45512 44913 44319 43730 43148 42575 42013 41463 40927 40405 39900 39413 

-97.7 -98.2 -98.7 -99.2 -99.7-100.1-100.5-100.8-101.0-101.1-101.2-101.1-100.9-100.6-100.1 -99.6 -98.9 -98.0 -97.1 

50711 50154 49591 49023 48452 47879 47305 46732 46161 45594 45032 44476 43929 43392 42865 42351 41850 41363 40892 

-101.2-101.6-101.9-102.3-102.6-102.8-103.1-103.2-103.3-103.3-103.2-103.0-102.7-102.3-101.9-101.3-100.6 -99.8 -98.9 

51707 51178 50644 50105 49564 49021 48478 47935 47395 46858 46326 45800 45281 44770 44269 43779 43301 42835 42383 

-103.9-104.2-104.4-104.6-104.8-104.9-105.0-105.0-105.0-104.9-104.7-104.4-104.1-103.6-103.1-102.5-101.9-101.1-100.3 

52656 52157 51654 51148 50639 50129 49619 49109 48602 48097 47597 47102 46613 46132 45659 45196 44743 44300 43870 

-105.8-106.0-106.1-106.2-106.2-106.3-106.2-106.2-106.0-105.9-105.6-105.3-104.9-104.5-104.0-103.4-102.8-102.1-101.4 

53545 53080 52611 52138 51664 51189 50714 50240 49767 49297 48831 48369 47912 47462 47020 46585 46159 45743 45337 

-106.8-106.9-107.0-107.0-107.0-106.9-106.8-106.7-106.5-106.3-106.0-105.7-105.3-104.9-104.4-103.9-103.3-102.7-102.1 

54365 53935 53501 53065 52627 52189 51751 51313 50877 50443 50012 49585 49163 48746 48336 47932 47536 47148 46769 

-107.1-107.1-107.1-107.1-107.0-107.0-106.8-106.7-106.5-106.2-105.9-105.6-105.3-104.9-104.4-104.0-103.5-103.0-102.5 

55105 54711 54315 53917 53517 53117 52717 52317 51919 51523 51130 50739 50353 49971 49595 49224 48860 48502 48152 

-106.6-106.6-106.6-106.6-106.5-106.4-106.3-106.1-105.9-105.7-105.4-105.1-104.8-104.5-104.1-103.7-103.3-102.9-102.5 

55756 55401 55043 54684 54324 53964 53603 53243 52884 52527 52172 51820 51471 51126 50785 50450 50119 49794 49476 

-105.5-105.5-105.5-105.5-105.4-105.3-105.2-105.1-104.9-104.7-104.5-104.3-104.0-103.7-103.5-103.2-102.8-102.5-102.2 

56312 55997 55679 55360 55041 54721 54401 54082 53764 53447 53132 52820 52510 52203 51900 51600 51306 51016 50731 

-103.9-103.9-104.0-104.0-103.9-103.9-103.8-103.7-103.6-103.4-103.3-103.1-102.9-102.7-102.5-102.3-102.1-101.9-101.6 

56768 56494 56218 55940 55663 55385 55107 54830 54553 54278 54004 53732 53463 53196 52931 52671 52414 52160 51911 

-102.0-102.1-102.1-102.2-102.2-102.1-102.1-102.1-102.0-101.9-101.8-101.7-101.6-101.5-101.4-101.2-101.1-101.0-100.8 

57122 56890 56656 56422 56187 55952 55717 55483 55250 55017 54786 54556 54328 54102 53879 53658 53440 53225 53014 

-100.0-100.1-100.2-100.2-100.2-100.3-100.3-100.3-100.3-100.3-100.2-100.2-100.1-100.1-100.0-100.0 -99.9 -99.9 -99.8 

57374 57185 56995 56805 56614 56424 56233 56043 55853 55665 55477 55291 55106 54922 54741 54562 54385 54211 54040 

-98.0 -98.1 -98.2 -98.2 -98.3 -98.4 -98.4 -98.5 -98.5 -98.5 -98.6 -98.6 -98.6 -98.6 -98.6 -98.6 -98.6 -98.6 -98.6 

57526 57382 57237 57092 56947 56802 56657 56512 56368 56224 56082 55940 55799 55660 55522 55386 55252 55120 54989 

-96.1 -96.2 -96.3 -96.4 -96.5 -96.6 -96.6 -96.7 -96.8 -96.8 -96.9 -96.9 -97.0 -97.0 -97.1 -97.1 -97.1 -97.2 -97.2 

57583 57485 57387 57289 57191 57092 56994 56896 56799 56702 56605 56509 56414 56320 56227 56136 56045 55956 55868 

-94.5 -94.6 -94.7 -94.8 -94.9 -95.0 -95.0 -95.1 -95.2 -95.2 -95.3 -95.4 -95.4 -95.5 -95.5 -95.6 -95.6 -95.7 -95.7 

57552 57502 57452 57402 57352 57302 57252 57203 57153 57104 57055 57007 56959 56911 56864 56818 56772 56727 56683 

-93.3 -93.4 -93.4 -93.5 -93.6 -93.6 -93.7 -93.7 -93.8 -93.8 -93.8 -93.9 -93.9 -94.0 -94.0 -94.0 -94.1 -94.1 -94.2 

57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
w 

00 

IGRF 1980 TOTAL INTENSITY (F) 

LONG -72 -70 -68 -66 -64 -62 -60 -58 -56 -54 -52 -50 -48 -46 -44 -42 -40 -38 -36 

LAT 

-60 39413 38944 38494 38064 37655 37267 36900 36555 36230 35927 35644 35381 35137 34912 34705 34515 34342 34184 34040 

-97.1 -96.1 -94.9 -93.7 -92.5 -91.1 -89.8 -88.5 -87.2 -86.0 -84.9 -83.9 -83.0 -82.3 -81.8 -81.4 -81.3 -81.5 -81.9 

-62 40892 40437 40000 39580 39179 38796 38433 38088 37762 37455 37167 36896 36644 36409 36191 35989 35802 35630 35473 

-98.9 -97.9 -96.9 -95.8 -94.7 -93.6 -92.4 -91.3 -90.3 -89.2 -88.3 -87.5 -86.8 -86.3 -85.9 -85.7 -85.7 -85.9 -86.3 

-64 42383 41946 41523 41117 40726 40352 39994 39654 39330 39024 38734 38460 38203 37962 37736 37526 37330 37149 36981 

-100.3 -99.5 -98.6 -97.6 -96.6 -95.7 -94.7 -93.8 -92.9 -92.1 -91.4 -90.7 -90.2 -89.8 -89.5 -89.4 -89.5 -89.7 -90.1 

-66 43870 43452 43048 42657 42280 41918 41570 41238 40920 40617 40330 40057 39799 39556 39327 39113 38912 38725 38551 

-101.4-100.6 -99.8 -99.0 -98.2 -97.4 -96.6 -95.9 -95.2 -94.5 -93.9 -93.5 -93.1 -92.8 -92.6 -92.6 -92.7 -93.0 -93.4 

-68 45337 44942 44558 44186 43826 43479 43144 42823 42515 42221 41940 41672 41418 41177 40949 40734 40533 40344 40168 

-102.1-101.4-100.8-100.1 -99.4 -98.8 -98.2 -97.6 -97.0 -96.5 -96.1 -95.7 -95.5 -95.3 -95.2 -95.2 -95.4 -95.6 -96.0 

-70 46769 46399 46038 45688 45348 45020 44702 44396 44102 43819 43548 43290 43043 42809 42586 42376 42178 41992 41818 

-102.5-101.9-101.4-100.8-100.3 -99.8 -99.3 -98.8 -98.4 -98.1 -97.7 -97.5 -97.3 -97.2 -97.2 -97.3 -97.4 -97.7 -98.1 

-72 48152 47810 47476 47150 46834 46527 46230 45942 45665 45398 45142 44896 44662 44438 44225 44023 43832 43653 43485 

-102.5-102.1-101.6-101.2-100.8-100.4-100.1 -99.7 -99.4 -99.2 -99.0 -98.8 -98.7 -98.7 -98.7 -98.8 -98.9 -99.2 -99.5 

-74 49476 49163 48858 48561 48271 47989 47715 47450 47194 46946 46708 46480 46261 46051 45852 45663 45483 45314 45155 

-102.2-101.9-101.6-101.3-101.0-100.7-100.4-100.2-100.0 -99.8 -99.7 -99.6 -99.6 -99.6 -99.6 -99.7 -99.9-100.1-100.3 

-76 50731 50451 50178 49911 49650 49396 49149 48909 48677 48453 48237 48029 47829 47638 47456 47283 47118 46963 46817 

-101.6-101.4-101.2-101.0-100.8-100.6-100.5-100.3-100.2-100.1-100.0-100.0-100.0-100.0-100.1-100.2-100.3-100.5-100.7 

-78 51911 51667 51428 51193 50964 50741 50524 50313 50108 49910 49719 49535 49358 49189 49027 48873 48727 48589 48459 

-100.8-100.7-100.6-100.4-100.3-100.2-100.1-100.0-100.0 -99.9 -99.9 -99.9 -99.9-100.0-100.0-100.1-100.2-100.4-100.5 

-80 53014 52807 52604 52405 52210 52020 51835 51656 51481 51312 51149 50992 50841 50696 50557 50426 50301 50183 50072 

-99.8 -99.7 -99.7 -99.6 -99.6 -99.5 -99.5 -99.5 -99.4 -99.4 -99.4 -99.5 -99.5 -99.5 -99.6 -99.7 -99.8 -99.9-100.0 

-82 54040 53871 53706 53544 53386 53232 53081 52935 52793 52655 52522 52394 52271 52153 52041 51934 51832 51736 51646 

-98.6 -98.6 -98.5 -98.5 -98.5 -98.5 -98.5 -98.6 -98.6 -98.6 -98.6 -98.6 -98.7 -98.7 -98.8 -98.8 -98.9 -99.0 -99.0 

-84 54989 54861 54736 54613 54493 54376 54262 54151 54043 53939 53838 53741 53648 53558 53473 53392 53315 53243 53175 

-97.2 -97.2 -97.2 -97.3 -97.3 -97.3 -97.3 -97.4 -97.4 -97.4 -97.5 -97.5 -97.5 -97.6 -97.6 -97.7 -97.7 -97.7 -97.8 

-86 55868 55782 55698 55615 55534 55456 55379 55304 55232 55162 55095 55030 54968 54908 54851 54798 54747 54698 54654 

-95.7 -95.7 -95.8 -95.8 -95.9 -95.9 -95.9 -96.0 -96.0 -96.0 -96.1 -96.1 -96.1 -96.1 -96.2 -96.2 -96.2 -96.2 -96.3 

-88 56683 56639 56597 56555 56515 56475 56437 56400 56364 56329 56295 56263 56232 56202 56174 56148 56122 56099 56077 

-94.2 -94.2 -94.2 -94.2 -94.3 -94.3 -94.3 -94.3 -94.4 -94.4 -94.4 -94.4 -94.4 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 
IGRF 1980 TOTAL INTENSITY (F) 

LONG -36 -34 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 

LAT 

-60 34040 33910 33794 33689 33597 33515 33445 33385 33335 33295 33266 33247 33239 33241 33256 33282 33321 33374 33442 

-81.9 -82.5 -83.4 -84.5 -85.9 -87.5 -89.3 -91.4 -93.6 -95.9 -98.4-100.9-103.5-106.1-108.7-111.2-113.7-115.9-118.1 

-62 35473 35329 35199 35081 34975 34881 34799 34728 34668 34620 34583 34557 34544 34542 34553 34577 34615 34668 34736 

-86.3 -86.9 -87.7 -88.8 -90.0 -91.5 -93.1 -94.9 -96.9 -98.9-101.1-103.3-105.6-107.8-110.1-112.3-114.4-116.3-118.2 

-64 36981 36827 36686 36558 36443 36339 36248 36169 36101 36046 36002 35972 35953 35948 35956 35978 36014 36066 36133 

-90.1 -90.7 -91.5 -92.5 -93.6 -94.9 -96.3 -97.9 -99.5-101.3-103.2-105.1-107.0-109.0-110.9-112.8-114.5-116.2-117.8 

-66 38551 38391 38243 38108 37986 37876 37778 37693 37620 37560 37512 37477 37455 37447 37452 37471 37506 37555 37621 

-93.4 -93.9 -94.6 -95.5 -96.5 -97.6 -98.8-100.2-101.6-103.1-104.7-106.3-107.9-109.5-111.1-112.7-114.2-115.6-116.9 

-68 40168 40005 39855 39716 39591 39477 39376 39287 39211 39148 39097 39060 39035 39024 39027 39045 39077 39124 39186 

-96.0 -96.5 -97.1 -97.9 -98.7 -99.7-100.7-101.8-103.0-104.3-105.6-106.9-108.3-109.6-110.9-112.2-113.4-114.6-115.6 

-70 41818 41656 41506 41368 41242 41128 41027 40937 40860 40796 40744 40705 40679 40667 40668 40683 40713 40757 40816 

w 

~ 

-98.1 -98.5 -99.0 -99.6-100.4-101.1-102.0-102.9-103.9-104.9-106.0-107.0-108.1-109.2-110.2-111.3-112.2-113.2-114.0 

-72 43485 43328 43182 43048 42925 42814 42715 42627 42552 42488 42437 42399 42373 42359 42360 42373 42400 42441 42496 

-99.5 -99.9-100.3-100.8-101.4-102.0-102.7-103.4-104.2-105.0-105.8-106.7-107.5-108.3-109.2-110.0-110.7-111.5-112.1 

-74 45155 45007 44869 44742 44626 44521 44426 44343 44271 44211 44162 44125 44100 44087 44086 44098 44123 44161 44212 

-100.3-100.6-101.0-101.4-101.9-102.4-102.9-103.4-104.0-104.6-105.3-105.9-106.5-107.2-107.8-108.4-109.0-109.5-110.0 

-76 46817 46681 46554 46437 46330 46233 46146 46070 46004 45948 45903 45869 45846 45834 45834 45845 45867 45902 45948 

-100.7-100.9-101.2-101.5-101.8-102.2-102.6-103.0-103.4-103.9-104.3-104.8-105.3-105.7-106.2-106.6-107.0-107.4-107.7 

-78 48459 48338 48225 48121 48026 47940 47862 47794 47736 47687 47647 47617 47597 47587 47587 47597 47618 47649 47690 

-100.5-100.7-100.9-101.1-101.4-101.6-101.9-102.2-102.5-102.8-103.1-103.4-103.7-104.0-104.3-104.6-104.9-105.2-105.4 

-80 50072 49968 49871 49783 49701 49628 49562 49504 49454 49413 49380 49355 49339 49331 49332 49341 49360 49387 49423 

-100.0-100.1-100.2-100.4-100.5-100.7-100.9-101.1-101.3-101.5-101.7-101.8-102.0-102.2-102.4-102.6-102.7-102.9-103.0 

-82 51646 51562 51483 51411 51346 51286 51233 51187 51147 51114 51088 51069 51057 51052 51053 51062 51078 51102 51132 

-99.0 -99.1 -99.2 -99.3 -99.4 -99.5 -99.6 -99.7 -99.8 -99.9-100.0-100.1-100.2-100.3-100.4-100.5-100.6-100.6-100.7 

-84 53175 53112 53053 52999 52950 52906 52866 52832 52803 52779 52760 52747 52739 52736 52739 52747 52760 52779 52803 

-97.8 -97.8 -97.9 -97.9 -98.0 -98.0 -98.1 -98.1 -98.2 -98.2 -98.2 -98.3 -98.3 -98.4 -98.4 -98.4 -98.4 -98.4 -98.4 

-86 54654 54612 54573 54538 54505 54477 54451 54429 54411 54396 54384 54376 54372 54371 54373 54380 54390 54403 54421 

-96.3 -96.3 -96.3 -96.3 -96.3 -96.4 -96.4 -96.4 -96.4 -96.4 -96.4 -96.4 -96.4 -96.4 -96.4 -96.4 -96.4 -96.3 -96.3 

-88 56077 56056 56037 56020 56005 55991 55979 55968 55960 55953 55948 55944 55943 55943 55945 55949 55955 55962 55971 

-94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.5 -94.4 -94.4 -94.4 -94.4 -94.4 

-90 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 57440 

-92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 -92.6 

APPENDIX 

SPHERICAL HARMONIC COEFFICIENTS FOR THE 

INTERNATIONAL GEOMAGNETIC REFERENCE FIELD 

(1965-1985) 
Appendix Spherical Harmonic Coefficients for the International Geomagnetic Reference Field 

Main Field (nT) sv (nT/yr) Main Field (nT) sv (nT /yr) 

n m DGRF DGRF DGRF IGRF n m DGRF DGRF DGRF IGRF 

196:; 1970 19 75 1980 19 80-85 1965 1970 1975 1980 1980-85 

g 0 -30334 -30220 -30100 -29988 22.4 h 7 6 -23 -23 -23 -23 -0.1 

g 1 1 -2119 -2068 -2013 -1957 11.3 g 7 7 1 -2 -5 -2 0.0 

h 1 1 5776 5737 5675 5606 -15.9 h 7 7 -12 -11 -12 -10 1.1 

g 2 0 -1662 -1781 -1902 -1997 -18.3 g 8 0 13 14 14 20 0.8 

g 2 1 2997 3000 3010 3028 3.2 g 8 1 5 6 6 7 -0.2 

h 2 1 -2016 -2047 -2067 -2129 -12.7 h 8 1 7 7 6 7 -0.1 

g 2 2 1594 1611 1632 1662 7.0 g 8 2 -4 -2 -1 1 -0.3 

h 2 2 114 25 -68 -199 -25.2 h 8 2 -12 -15 -16 -18 -0.7 

g 3 0 1297 1287 1276 1279 o.o g 8 3 -14 -13 -12 -11 0.3 

g 3 1 -2038 -2091 -2144 -2181 -6.5 h 8 3 9 6 4 4 o.o 

h 3 1 -404 -366 -333 -335 0.2 g 8 4 0 -3 -8 -7 -0.8 

g 3 2 1292 1278 1260 12 51 -0.7 h 8 4 -16 -17 -19 -22 -0.8 

h 3 2 240 251 262 271 2.7 g 8 5 8 5 4 4 -0.2 

g 3 3 856 838 830 833 1.0 h 8 5 4 6 6 9 0.2 

h 3 3 -165 -196 -223 -252 -7.9 g 8 6 -1 0 0 3 0.7 

g 4 0 957 952 946 938 -1.4 h 8 6 24 21 18 16 0.2 

g 4 1 804 800 791 783 -1.4 g 8 7 11 11 10 7 -0.3 

h 4 1 148 167 191 212 4.6 h 8 7 -3 -6 -10 -13 -1.1 

g 4 2 479 461 438 3 98 -8.2 g 8 8 4 3 1 -1 1.2 

h 4 2 -269 -266 -265 -257 1.6 h 8 8 -17 -16 -17 -15 0.8 

g 4 3 -390 -395 -405 -419 -1.8 g 9 0 8 8 7 6 

h 4 3 13 26 39 53 2.9 g 9 1 10 10 10 11 

g 4 4 252 234 216 19 9 -5.0 h 9 1 -22 -21 -21 -21 

h 4 4 -269 -279 -288 -298 0.4 g 9 2 2 2 2 2 

g 5 0 -219 -216 -218 -219 1.5 h 9 2 15 16 16 16 

g 5 1 358 35 9 356 35 7 0.4 g 9 3 -13 -12 -12 -12 

h 5 1 19 26 31 46 1.8 h 9 3 7 6 7 9 

g 5 2 254 262 264 261 -0.8 g 9 4 10 10 10 9 

h 5 2 128 139 148 149 -0.4 h 9 4 -4 -4 -4 -5 

g 5 3 -31 -42 -59 -74 -3.3 g 9 5 -1 -1 -1 -3 

h 5 3 -126 -139 -152 -150 0.0 h 9 5 -5 -5 -5 -7 

g 5 4 -157 -160 -159 -162 0.2 g 9 6 -1 0 -1 -1 

h 5 4 -97 -91 -83 -78 1.3 h 9 6 10 10 10 9 

g 5 5 -62 -56 -49 -48 1.4 g 9 7 5 3 4 7 

h 5 5 81 83 88 92 2. 1 h 9 7 10 11 11 10 

g 6 0 45 43 45 49 0.4 g 9 8 1 1 1 1 

g 6 1 61 64 66 65 o.o h 9 8 -4 -2 -3 -6 

h 6 1 -11 -12 -13 -15 -0.5 g 9 9 -2 -1 -2 -5 

g 6 2 8 15 28 42 3.4 h 9 9 1 1 1 2 

h 6 2 100 100 99 93 -1.4 g 10 0 -2 -3 -3 -3 

g 6 3 -228 -212 -198 -192 0.8 g 10 1 -3 -3 -3 -4 

h 6 3 68 72 75 71 o.o h 10 1 2 1 1 1 

g 6 4 4 2 1 4 0.8 g 10 2 2 2 2 2 

h 6 4 -32 -37 -41 -43 -1.6 h 10 2 1 1 1 1 

g 6 5 1 3 6 14 0.3 g 10 3 -5 -5 -5 -5 

h 6 5 -8 -6 -4 -2 0.5 h 10 3 2 3 3 2 

g 6 6 -111 -112 -111 -108 -0.1 g 10 4 -2 -1 -2 -2 

h 6 6 -7 1 11 17 0.0 h 10 4 6 4 4 5 

g 7 0 75 72 7 1 70 -1.0 g 10 5 4 6 5 5 

g 7 1 -57 -57 -56 -59 -0.8 h 10 5 -4 -4 -4 -4 

h 7 1 -61 -70 -77 -83 -0.4 g 10 6 4 4 4 3 

g 7 2 4 1 1 2 0.4 h 10 6 0 0 -1 -1 

h 7 2 -27 -27 -26 -28 0.4 g 10 7 0 1 1 1 

g 7 3 13 14 16 20 0.5 h 10 7 -2 -1 -1 -2 

h 7 3 -2 -4 -5 -5 0.2 g 10 8 2 0 0 2 

g 7 4 -26 -22 -14 -13 1.6 h 10 8 3 3 3 4 

h 7 4 6 8 10 16 1.4 g 10 9 2 3 3 3 

g 7 5 -6 -2 0 1 0.1 h 10 9 0 1 1 -1 

h 7 5 26 23 22 18 -o.5 g 10 10 0 -1 -1 0 

g 7 6 13 13 12 11 0.1 h 10 10 -6 -4 -5 -6 

142 

J.S. GOVERNMENT PRINTING OFFICE: 676-041-1982 



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