Hawaiian Volcano Observatory

1970 Quarterly Administrative reports

Introductory Note By Thomas L. Wright and Jennifer S. Nakata

Compiled By Jennifer S. Nakata

Summary 57

January, February, and March 1970

By Elliot T. Endo, Robert Y. Koyanagi, and Arnold T. Okamura

Summary 58

April, May, and June 1970

By Elliot T. Endo, Robert Y. Koyanagi, and Arnold T. Okamura

Summary 59

July, August, and September 1970

By Elliot T. Endo, Robert Y. Koyanagi, and Arnold T. Okamura

Summary 60

October, November, and December 1970

By Robert Y. Koyanagi, Arnold T. Okamura, and Patricia Stevenson

Trilateration Network on Kïlauea, Fall 1970

By Donald A. Swanson and Reginald T. Okamura

Open-File Report 2007-1330

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

DIRK KEMPTHORNE, Secretary

U.S. Geological Survey

Mark D. Myers, Director

U.S. Geological Survey, Reston, Virginia 2007

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INTRODUCTORY NOTE

The Hawaiian Volcano Observatory Summaries have been published in the current format since 1956. The Quarterly 

Summaries (1956 through 1973) and the Annual Summaries (1974 through 1985) were originally published as Administrative Reports. These reports have been compiled and published as U.S. Geological Survey Open-File Reports. 

The quarterly reports have been combined and published as one annual summary. All the summaries from 1956 to 

the present are now available as .pdf files at http://www.usgs.gov/pubprod.

The earthquake summary data are presented as a listing of origin time, depth, magnitude, and other location parameters. Network instrumentation, field station sites, and location algorithms are described. Tilt and other deformation 

data are included until Summary 77, January to December 1977. From 1978, the seismic and deformation data are 

published separately, due to differing schedules of data reduction. 

There are eight quarters—from the fourth quarter of 1959 to the third quarter of 1961—that were never published. 

Two of these (4th quarter 1959, 1st quarter 1960) have now been published, using handwritten notes of Jerry Eaton 

(HVO seismologist at the time) and his colleagues. The seismic records for the remaining six summaries went back to 

California in 1961 with Jerry Eaton. Other responsibilities intervened, and the seismic summaries were never prepared.

Chronology

The following Kïlauea eruption chronology covers the two recent reports and the six missing quarters:

Location Beginning Date Ending Date Comment

Kïlauea Iki crater (Kïlauea’s summit) 11/14/1959 12/20/1959 19 eruptive episodes

Kapoho (lower east rift zone) 1/13/1960 2/18/1960 4 eruption stages

Halemaumau (Kïlauea’s summit) 2/24/1961 2/24/1961 Intermittent activity during 

uninterrupted inflation following the 1960 eruption

Halemaumau (Kïlauea’s summit) 3/22/1961 3/25/1961 Same as above.

Halemaumau (Kïlauea’s summit) 7/10/1961 7/17/1961 Same as above.

Heiheiahulu (middle east rift zone) 9/22/1961 9/25/1961 First historical east rift eruption at this location

The 1959-1960 eruptions were among two of the most spectacular Kïlauea eruptions. The HVO staff was kept busy 

with acquisition of unusually high quantities of instrumental data and observations of the two sequences, which 

were separated by less than one month. Even with a year’s interval before the beginning of the summit-east rift sequence in 1961, the staff never caught up, and the seismic records were set aside for later study. 

A total of 1,672 earthquakes—1,106 for 1960 and 566 for 1961—are part of HVO’s cataloged database. The annual 

listings have been appended to the 1st Quarter Report of 1960 and to the 4th Quarter Report for 1961. The number of 

earthquakes is probably low, biased toward the larger magnitudes. The entire HVO catalog, including 1960 and 1961, 

is accessible from the ANSS CATALOG SEARCH site at http://www.ncedc.org/anss/catalog-search.

 Thomas L. Wright and Jennifer S. Nakata 
UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

SUMMARY 57

January, February, and March 1970

By Elliot T. End~/, Robert Y. Koyanagi

and Arnold T. Okamura

Issued May 1972

OBSERVATORY STAFF

Geology

w. A. Duffield

H. A. Powers (Scientist-in-Charge)

D. A. Swanson

Geophysics

D. B. Jackson

George Kojima

R. Y. Koyanagi

A. T. Okamura

Geochemistry

R. T. Okamura

Support

c. D. Arakaki

J. c. Forbes

w. H. Francis

B. J. Loucks

M. S. Onouye

M. K. Sako

Akira Yamamoto

~/ Office of Earthquake Research and Crustal Studies, Menlo Park, Calif.
CONTENTS

Page

Introduction ------------------------------------------------- 1

Chronological Summary ---------------------------------------- 4

Seismic Summary ---------------------------------------------- 6

Tilting of the ground around Kilauea Caldera ----------------- 50

References --------------------------------------------------- 54

Illustrations

Figure 1. Map of the Island of Hawaii showing seismometer

locations mentioned in text ----------------------- 2

2. Epicenter map ------------------------------------- 45

3. Response curve for System II, EV-17, Teledyne

seismic preamplifier ------------------------------ 46

4. Tilting of the ground around Kilauea Caldera ------ 52

Tables

Table 1. Number of earthquakes and minutes of tremor ------- 7

2. Summary of seismic events ------------------------- 13

3. List of felt earthquakes -------------------------- 44

4. U. S. Geological Survey seismograph stations

in Hawaii ----------------------------------------- 47

5. Seismic instrumentation --------------------------- 48

6. Tilt coordinates at Uwekahuna --------------------- 50

7. Tilt coordinates and changes at bases around

Kilauea Caldera ----------------------------------- 51

8. U. S. Geological Survey water-tube tiltmeter

stations in Hawaii -------------------------------- 53
INTRODUCTION

During the last few years the Hawaiian Volcano Observatory's

seismic network has undergone important changes. Thetelemetered

network around the summit of Kilauea has been reinforced and extended,

and mo~e stations (mostly telemetered by radio) have been added to the

broader Island of Hawaii network (fig. 1). All the telemetered stations

are recorded side. by side, along with the Uwekahuna chronometer and the

WWHV radio trace, on a single 16 rom film strip on a Deve10corder at the

observatory. Outstation timing has also been improved substantially by

the use of crystal chronometers instead of the old mechanical ones. As

a result of these improvements, the volume of usable recorded seismic

data has increased tremendously, both in the number of stations available

for each earthquake and in the number of earthquakes that are sufficiently

well recorded to be located. Methods of analysis previously used with the

HVO network are too slow and too subjective to enable using the improved

network data to fullest advantage.

Detailed studies of microearthquakes in California and Nevada by

the Geological Survey's National Center for Earthquake Research (NCER)

have generated similar voluminous sets of seismic data. Efficient

computer-oriented procedures for data reduction and computer programs

for data analY'sis have been developed and used extensively at NCER.

The HVO seismic data are now being analy'zed by a joint HVO-NCER team;

and the methods and computer programs used are virtually identical with

those employed with other networks at NCER.

Seismogram readings are punched on computer cards to provide an

input deck for use"in the location program HYPOLAYR (Eaton, 1969), which

generates an output deck summarizing the solution of each event. The

output deck is a convenient source of material for further analyses of

the earthquakes, and the input deck is saved for possible reanalysis

when better velocity-depth models of the crust are worked out. The

velocity-depth model currently used in the determination of hypocenters

(as tabulated below) is bas.ed on very limited data and represents a

broad average of crustal structure along the Hawaiian Ridge. It is

anticipated that further refinements in the model will not lead to large

changes in hypocenters calculated for events within the network, but

hypocenter solutions for some "poorly controlled" events outside the

network may be changed substantially.

Velocity model used for locating earthquakes in Hawaii (Eaton, 1962)

Depth to layer

(km)

0.00

3.10

11.20

14.80

1

Layer velocity

(km/sec)

3.90

5.00

6.80

8.25
wal~

Honokaa

'000 0" ,,-\ ~:

EXPLANATION

• Seismograph Station

o Town or locality

5 0 10 l~ Mile' ELH:a:::::: ,

5 0 5 I() 15 20 25 Ktlomete,. 888 e+3 i

Contour interval 1,000 feet

Datum '$ mean ,eo lev.1

Topography by US G.olo9,cal Survey

200

Figure 'l'·.·--Map of the Island of Hawaii showing seismograph stations

operated by the U.S. Geological Survey, principal settlements,

and selected geologic features. Epicenters of local earthquakes

are given in table 2 in terms of geographic coordinates, which

are indicated at .the edges of the map.

2
To permit more adequate reporting of results on individual earthquakes and to bring the HVO earthquake reports into conformity with

those produced at NCER, some revisions in the format of the HVO summary

are required. Beginning with the 1st quarter 1970 the f~llowing changes

are introduced:

~) The list of local earthquakes "includes all events for which

satisfactory hypocenters can be determined. This list includes

statistics on the hypocenter determination as well as a summary

hypocenter quality rating.

b) A map of epicenters on and near Kilauea volcano during the

quarter is included.

c) The station list is augmented to describe the timing system,

the type of preamplifier (for telemetered stations), and the

mode of recording.

d) The velocity-depth model of the crust used in the hypocenter

determinations is described.

3
CHRONOLOGICAL SUMMARY

Mauna Ulu eruption

Eruptive activity continued between Aloi and Alae craters on the

east·rift. Shallow tremor and degassing were continuous, and on

January 25 and 30, February 15, and March 1, weak fountaining and overflow were observed at the vent. Flows reached Aloi and also spread

north and eastward. The broad lava shield built by these and earlier

overflows is nearly 60 meters high and has overrun a considerable part

of the complex pumice and spatter cone built during earlier phases of

major fountaining. On April 1, 1970, the volume of lava erupted since

the last major fountaining on December 30, 1969 is in the neighborhood

of 2 x 106 m3.

Deformation studies

New tilt and Geodimeter stations were established on the rift zone

between Alae and Kane Nui 0 Hamo to replace those flooded on

December 30.

Horizontal strain increased to high levels during the first 3

months of 1970. The distances exhibiting greatest extensions were

those that cross the southern part of the caldera. These extensions

are consistent with the summit tilt changes as recorded at Uwekahuna

and Outlet vaults, although the extensions seem to be larger than

would be predicted on the basis of the tilt alone.

Attention is being focused on the Koae fault system. Detailed

mapping at a scale of about 1:5,000 was initiated. One continuously

recording INVAR-wire creepmeter is being tested on the Kalanaokuaiki

Pali about 1 km east of the Ainahou road crossing. Level lines across

the Koae system were rerun, and five new tilt triangles between Ahua

seismometer and the top of Kalanaokuaiki Pali were located and

measured. In addition, a detailed horizontal strain network, consisting of 99 Geodimeter lines averaging I km long, was established across

the southern part of Kilauea caldera and adjacent part of the Koae fault

zone.

Lower east rift earthquakes

About the middle of February, the Pahoa seismograph started to

record an increasing number of local earthquakes. Many of these events

were recorded in earlier years, but recent instrumental improvements

and the change of seismometer location from Pahoa School to Kaniahiku

Village (PAX, a site closer to the seismic area) greatly increased

recording capabilities. Consequently, larger numbers of earthquakes

are being recorded, although there may actually be no more events than

in earlier swarms.

4
To get a better idea of the source of the recent activity, a

temporary station was installed at Puu Honuaula (PHO), about 5 km

east of the new Pahoa station (PAX). In addition, a portable

seismograph was operated at key sites. From the recordings obtained,

the center of activity appeared to be near the vents of the 1955 rift

eruption, and a few earthquakes scattered as far as 5 km from this

center.

The magnitudes of these shocks were relatively small. Of approximately 6,600 recorded quakes, 16 were between magnitudes 2 and 3, and

2 were between magnitudes 3 and 4. Local residents reported feeling

the two larger events.

A segment of the level line from Pahoa to Pohoiki was re1eveled

to see if the current earthquake swarm caused any surface deformation.

The new altitudes show no significant change from those in March 1969,

relative to a bench mark at Pah.oa High School. Likewise, the Geodimeter lines along the lower east rift south. of Pahoa show no evidence

for local swelling but do sh.ow changes consistent with long-term trends.

5

t
SEISMIC SUMMARY

Events recorded by the U.S. Geological Survey seismograph network

in Hawaii fall into two categories:

1) Local earthquakes and tremor originating in the region of the

Hawaiian Islands (usually within 100 kIn of at least one

seismograph),

2) Distant earthquakes originating more than 3,000 km from Hawaii.

As an index of seismic activity at Hawaiian volcanoes, daily counts of

earthquakes and minutes of tremor recorded by seismographs in Hawaii

are listed in table 1. The earthquakes are separated in groups on the

basis of region of ,origin as determined by the analysis of records

obtained daily at the observatory (UWE, MLO, MLX, AHU, DES, NPT, WPT,

MPH, KMO, OTL). •

Computer locations of well-recorded events are listed in table 2.

The location of each seismograph station is listed in table 4, along

with a description of the equipment at each station.

Acknowledgments.--Several people or agencies "felt" earthquakes during

the first quarter, 1970. Their assistance is gratefully acknowledged.

6
Table l.--Number of earthquakes and minutes of tremor recorded on seismographs aro

Kilauea Caldera

Tremor is separated into three categories: deep, intermediate, and shallow, on the bas

relative amplitude on seismographs in the summit region. Unless otherwise stated, tr

presumed to be associated with movement of magma within the central complex of Kilaue

Earthquake categories are: Kilauea summit, 30 km, earthquakes from a source about 30 k

the Kilauea summit region; long-period, earthquakes characterized by low-frequency wa

originate about 5 km beneath Kilauea summit; and earthquakes in the Kilauea C

region; shallow earthquakes along the SW. rift zone of Kilauea and the adjacent porti

Kaoiki fault system; earthquakes from the upper east rift zone and the adjacent fault 

of Kilauea's south flank; shallow along the northeast-trending Koae fault 

south of Kilauea caldera; and earthquakes from other regions: west Hawaii, Mauna Kea

Tremor Earthquakes

(m = minutes

Date h = hours) 'Kilauea Summit

(1970) SW rift Upper Lower

Inter- Long and east east

Deep mediate Shallow 30KM Period Shallow Kaoiki rift rift Othe

Jan 1 ? 47 42 8

2 ? 58 21 22

3 ? 53 3 23

4 ? 45 ? 3

5 35? 48 6 11

6 63? 159 11 54

7 98 239 12 21

8 42? 229 17 40

9 23? 267 9 27

10 9? 38 9 24
11 1 317 69

9 20

12 8 61 12 36

13

2 32 69 14

14 15

2 42 17 20

15 1 28 8 23 5

16 60 59 7 14

17

2 57 15 11

18 1 4' 389 10 37

19

6 5 445 9 32 1

20

2

4 331 6 ' 43

21

2 1290 9 60

22 1 10? 611 6 72

23 161 456 7 60

24 8? 187

4 35

25 1 6? 115 8 26

26 4? 144 6 42

27 27 2? 133 10 80

28 30 1 27 165 5 15

29

2 10? '266 11 21

30 45 1 15? 123 5 6

31 ? 171

4 6

Feb 1 10 570? 303 ? 7

2 36

4 9? 502 9 13

3 2 920 8 28 1

4 12 465 15 38

5 1 372 9 56

6 361 3 20

7 260

4 18

8 6 312 7 177 1

9 2 424 7 180

2

10 1 1 190 7 75

11 22? 222 15 29

2

12 18? 39 12 26
Table l.--Number of earthquakes and minutes of tremor recorded on seismographs aro

Kilauea Ca1dera--Continued

Tremor Earthquakes

(m = minutes

Date h = hours) Kilauea Sununit

(1970) SW rift Upper Lower

Inter- Long and east east

Deep mediate Shallow 30KM Period Shallow Kaoiki rift rift Other

Feb 13 17? 27 16 190

14 2 35 28 42

15 3 70 19 15

16 2 62 8 13 1

17 8 117 6 6 2 

18 10 163 10 28 242 

19 20 20 2? 160 5 16 449 

20 ? 110 6 7 792 

21 ? 125 8 8 978 

22 4 ? 101 10 8 538 

23 4 58 6 15 468 

24 4 1 2 126 5 8 139

25 7 190 11 8 ?

26 2 2 188 10 10 81

27 580 7 12 26

28 (1) 413 5 7 ?

Mar 1 4 3 79 7 7 152

2 3 120 9 7 486

3 4 159 5 44 430

4 4 164 10 16 311

5 4 2 160 3 9 239
Mar

6 1 162

9 5 397

7 66

9 5 113

8 1 187 12 17 212 

9 1 207 15 21 118 

10 20

4 151 13 14 2'07 

11

9 99 12 17 36 

12

4 6? 171 10 15 226 

13 5? 79 14

9 27 

14 1 71? 378

5 10 39

15

2 61? 1467 18 29 19

16 34? 251.

9 . 23 ?

17

2 236 10 40 3

18

2 375

8 32 3

19 248 12 18 13

20 5? 534

6 34

6

21 2? 282 3 32

4

22 3 315 15 51

23

2 677 10 49

24

2 218 62 36 0 25 6? 134 24 35

26 5? 99 17 20

27 4? 57 11 14

28 81

7 13

29

2 1 138 14 37

30 1 169 15 31

31

2 1 351

8 85 1
·Computer analysis of the HVO network data permits the systematic

treatment of far more earthquakes than was possible prev~ously. This

extended coverage should permit a more detailed examination of the

relationship between earthquakes and volcanism in Hawaii.

"Table 2 is a chronological listing of successfully located earthquakes. For ea~h event the following data are presented:

Origin time in Greenwich Civil Time: date, hour (RR) , minute (MN),

and second (SEC).

Epicenter in degrees and minutes of North latitude (LAT N) and

West longitude (LONG W). Poor convergence of the epicenter solution

is indicated by"?".

Depth depth of focus in kIn. Assumed depth is indicated by "x".

Mag - magnitude, if determined.

NO - number of stations used in locating earthquakes.

GAP largest azimuthal separation in degrees between stations.

DMIN - epicentral distance in km to the nearest station.

ERT - s·tandard error of the origin time in seconds.

ERR

ERZ

MD

- standard error of the epicenter in km.

- standard error of the depth in km.

- mean deviation of the time residuals. [= Ri INOJ where

R. is the observed seislnic wave arrival time less the com- l.

d pute · h .th t t· tl.me at tel. salon.

Q - solution quality of the hypocenter. This measure is

intended to indicate the general reliability of each

solution:

Q Epicenter Focal Depth

A excellent good

B good fair

C fair poor

D poor poor

11
Q is based both on the nature of the station distribution with

respect to the earthquake and the statistical measures of the

solution. These two factors are each rated independently

according to the following scheme:

.Station Distribution

A

B

c

D

NO GAP DMIN

> 8 < 1200

< DEPTH or 5 kIn

> 6 < 1500

< 2 x DEPTH or 10 km

> 6 < 225 0 < 50 km

> 4 < 1800

-

Others

Statistical Measures

ERH(km) ERZ(km) MD(sec) RMAX(sec)*

A < 1.0 < 2.0 < 0.10 < 0.25

B < 2.5 < 5.0 < 0.20 < 0.50 -

C < 5.0 < 0.30 < 0.75

D Others

Q is taken as the average of the ratings from the two schemes,

that is, an A and a C yield a B, and two B's yield a B. When

the two ratings are only one level apart the lower one is used,

that is, an A and a B yield a B (Hamilton and others, 1969).

The criteria for Q are the same as used by th.e Office of

Earthquake Research and Crustal Studies, U.S. Geological Survey.

*RMAX is the maximum residual

12
TABLE 2

SLJMMARY OF SfISMIC EVENTS

1970 HR MN SEC lAT N LONG W DEPTH MAG NO GAP t1MI N ERT ERH E

JAN 1 3 29 17.4 19-19.1 155-13.8 9.9 1.9 12 19q 6.5 0.17 1.3 0

1 4 44 53.8 lC,J-22.6 155-23.7 11.1 1.9 14 113 4.6 0.06 0.6 O

1 5 22 45.8 19-10.9 155-29.8 36.1 2.7 14 161 14.8 0.29 1.2 2

1 9 11 42.6 19-16.9 155-21.4 7.2 1.8 12 171 6.9 0.11 0.8 0

1 to 11 58.4 19-18.4 155-14.1 8.4 1.6 12 212 6.5 0.25 1.6 . 0

1 23 28 0.3 19-15.2 155- 7.0 4.3 1.8 10 251 13.3 0.53 2.5 2

2 5 SO 7.7 19-24.4 155-11.1 13.9 1.4 12 72 0.9 0.12 1.0 1

2 I) 50 5'7.8 19-24.0 1'55-17.0 16.8 1.5 11 74 0.08 0.5 0

2 12 20 32.6 19-23.0 15,5-36.57 10.6 3.3 18 168 15.0 0.14 0.9 1

2 71 21 2.,.1 19-21.6 1,55-23.9 9.6 2.1 9 194 2.9 0.14 0.9 0

2 22 8 53.8 19-22.9 155-23.6 11.1 1.9 18 114 5.0 0.08 0.1 0

2 27 18 '38.0 lq-22.3 155-10.1 6.3 2.8 q 164 1.0 0.23 1.3 1

3 1 11 41.3 19-17.4 155-28.1 8.8 2.5 15 135 9.9 0.09 0.8 0

I-l 3 1 58 56.7 19-25.1 155-23.2 11.1 1.5 11 16q 6.4 0.10 0.9 0

w "3 3 47 9.9 19-17.q 15S- q.O? 10.8 12 231 7.3 0.25 1.7 1

1 3 47 32.q 19-19.9 15'5-10.4 10.0 1.4 7 259 3.5 1.44 4.6 6

3 4 28 1.8 lCJ-25.4 155-38.3 4.0 1. 9 5 212 19.5 

3 5 '54 43.4 19-23.6 155-16.5 14.3 1.7 17 68 0.6 0.01 0.8 0

3 13 24 57.1 lQ-23.0 155-17.8 18.0 2.0 10 89 1.9 0.12 0.9 1

3 15 6 27.8 19-16.2 155- 5.1 3.9 2.9 14 234 17.1 0.46 2.2 1

15 2q 5Q.O lq-18.1 155- 5.7 6.7 2.5 16 223 10.1 0.34 1.7 0

3 22 57 15.0 19-15.2 155- 4.3 4.8 2.0 15 2.55 15.8 0.69 3.2 2

it 0 30 17.6 lQ-54.S 15'5-29.4 34.6 2.5 13 299 15.0 0.27 1.9 3

4 6 59 2.0 lQ-?l.O 155- 1.7 4.4 2.2 15 225 14.6 0.35 1.9 1

4 11 40 2 6 19-19.0 155- 8.5 9.6 2.5 11 283 5.8 0.59 3.1 0

5 17 54 45.8 19-11.2 155-52.8 6.3 1.0 6 184 4.3 0.48 10.3 7

6 4 14 5<.). 1 19-26.7 15'5-26.5 14.9 7 249 7.9 0.91 4.4 7

6 6 16 25.3 19-19.8 155-25.1 11.1 11 160 0.08 0.8 1

6 19 48 4 1'1-22.1 155-12.6 5.6 2. 1 15 141 0.5 0.20 1.3 1

6 21 50 57.6 19-47.6 1&)5-58.9? 16.5* 2.1 18 240 .30.9 0.46 3.1 
SUMMARY OF SEISMIC FVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO l;AP DMIN ERT ERH E

JAN 7 &) 18 46.6 19-20.6 155-13.3 9.1 3.0 16 186 2.1 0.12 0.9 0

1 "1 33 41.0 19-19.8 151)- 5.9 5.6 2.1 15 215 8.1 0.33 1.9 1

7 1 58 28.9 lq-24.6 155-49.3 7.3 1.6 12 189 16.1 0.35 4.8 1

7 18 26 60.0 19-31.0 155-41.3 5.4 1.5 13 183 24.5 0.14 1.0 0

1 22 25 17.7 19-20.3 155-13.8 9.4 14 165 3.7 0.11 0.9 0

7 2.3 72 54.8 19-19.5 155-14.5 9.1 1.9 15 112 4.5 0.11 0.9 0

7 73 32 57.6 19-20.0 155-11.3 8.3 10 223 4.0 0.22 1.7 1

8 0 It 1 19.8 19-21.0 155-13.0 9.0 2.4 16 151 0.09 0.8 0

8 2 5 45.2 19-23.2 155-27.07 11.7 2.3 14 15 8.6 0.12 0

8 4 40 4.0 lq-22.5 155-26.0 12.2 8 146 6.4 0.12 1.0 28 7 17 36.6 19-19.q 155-13.7 10.1 14 195 4.3 0.06 0.6 0

8 7 25 33.5 19-12.8 155-22.9 2.2 14 221 13.6 0.74 1.4 3

8 q 35 53.9 Lq-21.9 155- 7.4 1.0 1.8 14 199 4.5 0.18 1.4 1

8 12 20 42.'1 19-10.8 155-21.3 10.9 13 246 7.2 0.15 1.0 0

8 16 .33 27.2 19-23.6 155-23.5 8.2 13 150 6.2 0.12 0.9 0

8 17 38 40.4 19-19.0 155-14.1 10.6 12 224 6.0 0.18 1.1 0

8 18 13 31.3 19-18.7 1'55-13.97 10.2 9 229 6.4 0.28 1.6 0

8 18 53 56.5 19-20.4 155-13.9 10.9 10 196 l.6 0.11 0.9 0

-8 1.9 0 46.1 19-19.6 155-14.0 10.0 14 112 4.9 0.10 0.8 0

8 20 51 21.3 19-17.7 155-13.q 10.0 9 229 1.6 0.19 1.3 0

8 71 to 21.6 lQ-50.4 155-35.51 60.5* 2.6 17 782 4.3.5 3.SQ 32.6 

8 21 4 39.6 19-'>3.9 155-29.0 5.6 1.8 21 208- 27.0 0.32 2.2 2

fl 22 48 41.7 19-20.1 1&55-15.9 9.3 14 L57 2.5 0.06 0.1 0

8 ;J? 55 6.0 19-20.0 155-15.8 9.3 15 158 2.8 0.06 0.6 0

') 3 2.0 1.5 19-21.7 155-24.3 11.7 14 125 3.2 0.09 0.7 1

9 3 54 13.3 19-20.8 155-28.7 9.5 2.2 17 106 q.6 0.09 0.9 0

9 4 49 47.9 19-24.9 155-25.8 10.2 14 233 9.8 0.19 1.0 0

q 7 46 56.1 19-/t8.5 155-48.7 7.2* 13 320 1:)6.2 3.11 18.9 

9 13 11 31.8 19-19.9 155-11.4 13.5 1.8 12 2 4.3 0.26 1.3 1

q 14 23 27.5 19-18.9 155-13.7 12.9 1.7 12 228 5.9 0.10 0.5 0
SlJMMAR Y OF SEISMIC EVENTS (CONTINUED)

1Q70 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

JAN 9 14 56 56.3 19-19.5 155-28.4 1.3.2 1.6 7 161 9.0 0.13 1.3 2

9 11 43 5.6 19-19.0 155-14.5 12.5 1.5 8 293 5.3 0.14 1.0 ,0

9 20 44 11.8 19-7.5.9 155-22.5 10.8 1.6 16 137 4.4 0.08 0.8 0

9 23 1 18.4 19-17.6 155-16.2 10.1 2.5 18 175 5.1 0.10 0.8 0

q 23 1'3 40.Q lq-17.6 155-16.1 14.5 0.9 q 237 5.2 0.14 0.6 1

9 23 22 46.1 1<)-17.8 155-16.1 ·10. 1 15 202 4.8 0.10 e.7 0

10 5 4fl 37.4 19-20.1 155-11.8 11.0 1.4 15 211 3.9 0.10 0'.8 0

10 12 33 32. 1 19-25.6 15')-24.6 13 •. 1 1 • 5 8 209 7.8 0.27 1.0 2

10 18 56 33.7 19-10.4 155- 5.2 0.5 2.0 14 274 22.6 1.59 3.2 5

10 1q C) 20.8 19-16.1 1'55- 5.q 9.1 1.9 12 247 12.7 0.61 3.3 1

10 19 41 42.8 19-19.1 155-14.6 9.2 1.5 15 217 5.1 0.20 1.4 0

LO 73 48 3.2 lC)-20.1 155-28.6 12.1 1.6 9 168 9.3 0.11 1.2 2

11 2 15 39.4 19-21.2 155-17.9 29.5 2.0 18 73 2.2 0.13 0.9 

11 9 30 1.9 lQ-20.2 155-12.4 11.4 1.4 14 208 3.4 0.09 0.9 0

Ln 11 15 29 52.4 19-18.4 155-15.7 8.q 1.8 15 224 4.3 0.21 1.3 0

11 15 S5 57.0 19-18.0 155-17.2 8.2 1.7 11 230 3.9 0.26 1.8 0

12 0 5q 16.5 19-19.4 155-11.4 11.2 1.7 10 211 5.1 0.18 1.3 0

12 2 23 41.8 19-24.7 155-15.'7 9.5 9 178 2.3 0.62 1.8 3

12 4 34 12.1 19-11.4 155-24.5 17.2 1.5 1 302 5.6 1.50 8.0 8

12 8 3 30.6 1.9-18.3 155-14.4 14.5 1.3 q 234 6.3 0.14 0.6 

12 8 51 11.3 19-22.4 155-23.3 9.9 1. q 9 181 4.0 0.67 1.4 4

12 14 8 59.5 19-25.4 155-23.5 11.5 1.8 12 185· 6.4 0.16 0.7 

12 17 10 42.1 19-19.4 1'>5-11.9 13.8 1.6 5 238 5.5 

12 11 16 8.9 19-19.4 155-11.9 8.8 1.3 10 236 5.0 0.30 1.8 0

12 11 26 59.4 19-11.2 155-10.1 12.9 1.7 q 282 8.5 0.33 2.3 

12 17 39 .35.0 19-19.8 155-10.3 13.2 1.2 q 265 3.1 0.21 1.0 112 17 41 2.6 19-20.6 155-12.6 9.0 1.5 8 201 2.7 0.52 2.5 2

12 1'1 't3 46.6 19-17.5 155-l0.21 13.7 1.4 8 219 7.9 0.38 1.6 1

17 18 J I 45.2 19-16.9 155- 4.4 7.5 2.2 13 246 13.3 0.59 3.1 1

12 20 50 26.6 19-19.1 10.9 1.7 11 223 5.5 0.15 1.0 0
SUMMARY OF SEISMIC EVENTS (CONTIj\jUEO)

1970 HR MN SEC lAT N LONG W DEP.TH MAG NO GAP DMIN ERT ERH E

JAN 12 20 52 18.8 19-19.4 155-15.9 9.0 2.1 15 211 3.0 0.15 l.O 0

12 23 15 9.3 19-24.3 155-18.2 18.5 1.9 12 94 1.5 0.20 1.1 .2

12 73 54 55.0 19-20.1 155-14.5 11.0 1.1 10 232 3.5 0.12 0.9 0

13 6 20 6.5 19-25.0 155- 9.11 53.0* 2.5 16 123 6.0 0.55 6.8 

13 6 23 31.5 19-20.0 155-12.1 8.3 1.2 10 223 3.8 0.30 1.5 1

13 6 29 30.9 19-19.8 155-12.0 . 9. 1 1.4 12 229 4.3 0.21 1.2 0

13 6 32 32.6 1<)-20.5 155-12.3 9.2 11 205 2.8 0.26 1'.2 1

13 6 41 49.6 19-20.7 155-13.4 10.0 9 190 2.7 0.44 1.1 7

13 10 .30 44.6 19-20.5 155-12.6 15.3 1.5 8 272 2.8 0.18 1. 1 1

13 20 27 22.9 1q-12.8 155-27.9 8.9 2.3 13 168 15.8 0.10 1.0 0

13 23 29 28.6 19-.22.8 155-21.6 5.8 1.0 6 158 3.7 0.30 0.8 2

14 0 38 59.2 19-20.4 155-26.9 14.8 1.9 6 2A8 6.4 1.45 6.2 8

14 7 29 38.3 19-23.4 155-31.5 22.2 2.1 11 298 15.5 0.30 2.2 3

L4 11 17 40.4 19-18.6 155-16.2 9.6 9 239 3.4 0.15 1.0 0

t-&

0\ 14 12 14 5-'.8 19-19.7 155-11.6 11.4 10 238 4.8 0.28 1.5 1

1'+ 12 IE) 53.6 19-19.6 155-11.1 8.1 1.6 8 235 4.1 0.42 2.7 1

14 16 '+4 56.7 19-19.4 155-10.5 11.2 1.4 11 21q 4.5 0.10 0.9 0

14 11 18 25.4 18-53.0 155-25.5 8.0* 5 :J37 50.3 6.35 37.4 

1'4 21 12 4"7. b 19-25.1 155-22.2 10.3 2.4 15 136 5.1 0.09 0.8 0

14 22 12 10.0 19-18.7 155-15.5 14.2 7 244 4.2 0.36 1.4 2

14 22 15 12.5 19-18.0 155-27.3 8.3 1.7 13 133 8.1 0.10 1.1 0

14 72 17 54.1 lq-18.7 155-25.71 11.5 8 156 5.0 0.16 1.7 2

14 23 2 34.2 IQ-16.3 155-26.6 3.2 1.8 14 146 9.2 0.15 1.4 1

15 2 14 4.9 lQ-19.0 155-12.7 10.B 1.1 14 219 5.5 0.14 1.0 0

15 2 28 7.6 19-16.1 155-20.9 q.9 11 168 8.5 0.09 0.8 0

15 2 33 lq-16.5 155-21.0 9.8 11 166 7.9 0.09 0.8 0

15 3 11 49.3 1Q-lY.6 15.5-11.5 11.0 q 21.6 4.9 0.22 1.9 0

15 5 32 10.1 19-19.4 155-16.2 11.2 10 225 2.4 0.34 1.0 1

15 11 51 37.9 19-16.7 155- 8.9 7.8 10 239 9.5 0.50 2.7 1

is 12 13 6.2 19-49.4 155- 2.8? 37.1 1.4 22 297 39.4 0.28 2.1 2
SUMMARY OF SEISMIC EVENTS (CONT I

1970 HI{ MN SEC LAT N LONG W DEP.TH MAG NO GAP rJMIN ERT ERH E

JAN 15 13 34 23.6 19-11.4 155-31.7 7.6 2.1 12 148 11.4 0.11 1.1 0

15 70 7 24.5 19-10.1 155-31.2 8.2 10 158 13.6 0.11 1.1 .0

15 23 57 55.0 19- 3.9 155- 7.91 7.2 17 244 33.1 0.31 3.6 8

15 23 58 18.·0 19- 9.4 1'55-30.47 7.8 9 112 15.2 0.19 2.0 1

16 0 50 46.2 19-24.0 155-27.6 8.4 1.1 17 116 13.1 0.13 1.0 0

16 7 1 17.4 lQ-21.0 155-18.5 ·28.0 1. 1 17 96 2.5 0.15 0.9 1

16 q 21 59.3 19-19.4 155-13.6 10.6 8 221 5.0 0.10 0.9 0

16 15 to 40.0 19-21.2 155-17.9 23.0 2.2 16 92 2.2 0.16 1.2 1

16 16 44 24.7 19-57.6 155-26.41 13.2 1.6 11 302 20.4 0.49 4.1 2

17 9 50 4.3 19-18.4 155-20.2 27.5 14 195 5.9 0.45 3.8 3

17 12 8 .36.6 19-10.2 155-.34.4 5.2 13 9.9 0.08 0.8 0

17 16 5 19.3 19-11.4 155-29.9 8.2 12 162 14.1 0.11 1.0 0

17 16 35 12.2 19-16.3 155-25.5? 11.5 9 199 8.2 0.26 1.4 3

11 18 52 44.3 19-21.5 155-29.1 1.9 8 135 10.4 0.16 1.6 1

'J 17 22 23 37.1 lq-14.4 155-48.0 8.3 2.4 15 282 19.1 0.31 2.0 1

18 0 56 24.4 lq-15.1 1155- 5.6 5.6 1,3 254 L4.7 0.61 2.9 1

18 1 44 43.3 19-14.2 155- 4.5 3.7 1.6 14 260 20.5 0.17 3.4 2

19 1 40 50.1 19-22.8 155-26.41 7.1 0.8 15 126 1.3 0.11 0.9 0

1"9 6 51 32.4 19-22.5 155-16.3 27.4 16 18 0.8 0.21 1.3 2

19 7 3 5.9 19-22.0 155-73.5? 7.6 12 III 3.4 0.11 1.1 1

lq 8 8 24.8 19-21.3 155-13.9 8.5 2.5 19 149 2.4 0.09 0.8 0

19 8 52 23.9 19-2.3.5 155-17.2 17.5 16 61 0.7 0.05 0.5 0

19 9 1 34.0 lQ-lO.5 155-35.1 8.7 8 145 8.8 0.07 0.8 0

it") 15 9.2 19-10.4 155-25.1 22.7 10 196 1.8.5 0.2'1 2.3 4

1q 72 10 55.2 19-78.0 155-52.8 10.4 1.6 17 115 7.3 0.12 2.7 2

20 1 lq 34.9 19-23.6 155-35.8 9.4 2.0 19 104 l6.2 0.15 0.9 120 2 1 22.8 19-16.8 155-19.8 31.2 l1 169 7.4 0.18 0.9 1

20 2 56 19.6 1'1-17.3 155- 7.4 5.3 16 238 9.5 0.40 1.9 1 

70 4 L1 11.0 19-19.3 155-16.9 30.8 17 209 1.7 0.19 1.9 1

20 1 54 40.1 19-23.5 155- 4.2 6.6 2.2 15 lqa 10.5 0.25 2.0 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

JAN 2'0 10 35 54.0 19-21.4 155'-10.4 9.6 1.4 15 208 1.0 0.16 1.2 0

20 18 20 54.2 1q-21.4 15.5-11.2 6.2 12 185 2.2 0.23 1.6 0

20 20 50 36.4 1q-23.3 155-16.7 14.6 0.7 18 59 0.2 0.06 0.8 0

21 1 5 ,"i6.0 19-18.5 155-18.8 36.1 11 221 3.8 0.35 1.6 2

21 1 55 56.6 19-19.6 155-10.9 1.q 9 237 4.4 0.40 2.9 1

21 15 31 26.8 19-18.5 155-16.1 8.0 13 1qq 3.7 0.15 1.0 0

21 18 2 36.9 19-16.6 155- 9.6 8.2 1.2 13 240 9.7 0.79 4.1 2

21 2() 16 5.1 19-22.4 155-25.9 1.9 16 11 6 .• 1 0.09 0.9 0

22 0 29 24.9 19-24.0 155-16.5? 3.0 0.5 8 111 1.3 0.08 0.6 0

22 0 31 27.8 19-23.9 151)-16.3 4.0 0.8 11 85 1.3 0.10 0.5 0

27 0 33 28.9 lq-24.3 155-16.4 3.5 7 III 1.5 0.08 0.4 0

22 0 l1 49.2 19-23.q 1'55-16.1 3.1 6 142 1.5 0.12 0.9 0

22 0 36 56.2 19-24.1 155-16.0 2.6 6 99 2.2 0.11 0.7 0

22 0 37 39.1 19-24.3 155-16.4 2.7 5 114 1.6 

ex> 22 0 38 23.4 19-23.1 155-11.0 11.3 6 81 4.9 1.15 2.3 8

22 0 43 36.0 19-24.3 155-15.4 1.1 10 110 2.9 0.05 0.3 0

22 0 49 10.8 19-24.1 155-17.0 2.9 7 95 1.4 0.13 0.8 1

22 0 50 46.4 19-22.1 155-16.1 9.CJ 6 122 4.3 2.11 5.0 14

22 0 55 .3.8 19-24.4 155-16.7 6.5 1.7 12 58 1.1 0.10 0.9 0

22 0 58 52.0 19-24.5 155-16.2 1.6 7 112 1.6 0.08 0.5 0

22 0 59 24.4 lq-23.q 155-17.01 3.4 q 54 1.7 0.13 0.1 1

22 1 0 40.7 19-23.6 155-16.8 3.9 8 93· 2.7 0.18 1.0 3

22 1 1 11. 1 1<l-24. 1 155-16.6 2.8 11 79 1.3 0.06 0.5 0

22 1 3 20.2 19-24.2 155-16.0 1. q 1 101 3. ,3 0.10 0.8 1

22 1 3 44.6 19-24.2 155-16.41 2.2 8 104 1.6 0.06 0.5 0

22 1 4 53.1 19-24.3 11)5-16.0 2.8 1 124 2.1 0.09 0.7 1

22 1 5 57.2 19-24.6 155-16.7 2.4 7 106 0.8 0.08 0.6 0

22 1 fJ 24.1. lq-24.8 155-16.9 1.6 -0.1 '1 204 1.0 0.04 0.3 0

22 1 10 10.9 19-23.9 155-16.5 2.9 13 76 1.0 0.06 0.5 0

22 1 11 17.9 19-21.9 155-25.6 8.4 1.7 14 119 5.1 0.14 1.2 o
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 Hi< MN SEC N LONG W OEP.TH MAG NO GAP DMIN ERT ERH E

JAN 22 1 12 28.8 19-24.1 155-16.6 2.8 9 108 1.4 0.05 0.4 0

22 1 13 12.1 1q-24.2 155-16.1 3.1 6 2.32 1.9 0.12 0.6 0

22 1 14 48.1 1q-24.1 155-15.8 0.1 q 110 2.2 0.12 0.4 10

22 1 15 9.8 19-24.1 155-16 • .3 2.3 11 92 1.6 0.08 0.6 0

22 1 18 17. 1 19-?4.5 155-16.4 0.5 7 118 1.3 0.11 0.4 1

22 1 19 16.5 19-23.8 155-16.0 3.9 12 90 1.6 0.07 0.4 0

22 1 20 18.6 19-23.q 155-16.47 3.1 11 78 1.1 0.07 0.6 0

22 1 21 53.0 19-21.9 155-27.41 11.0 2.4 1 '3 118 8.0 0.12 1.0 0

22 1 27 52.6 19-26.3 155-14.7 7.9 0.6 7 304 4.7 1.51 8.7 6

22 1 24 44.7 19-24.4 155-15.8 2.0 9 118 2.4 0.07 0.5 0

22 1 26 5.8 19-21.5 155-13.1 8.0* 5 32q 8.4 0.58 2.6 

22 1 26 54.8 19-24.3 155-16.6 2.7 8 100 1.4 0.04 0.3 0

22 1 29 17.2 19-24.3 155-16.2 3.1 6 223 1.8 0.63 2.6 2

t-& 27 1 29 42.4 19-24.4 155-16.5 2.5 6 110 1.3 0.03 0.3 0

\0

22 1 30 9.9 19-24.2 155-16.1 3.7 8 105 1.4 0.13 0.7 1

27 1 32 12.8 19-32.2 155-11.11 8.0* 5 J17 1q.1 3.56 13.9 

22 1 '32 38.4 19-24.2 155-15.9 3.1 ') 238 2.1 

22 1 33 58.6 19-24.3 155-16.4 3.4 6 227 1.8 0.07 0.3 0

2'2 1 36 4.2 19-24.8 155-16.0 0.5 8 141 2.6 0.09 0.5 0

22 1 31 23.4 lq-28.5 155-15.61 3.1* 0.2 7 '324 6.6 1. 15 5.5 

22 1 38 42.0 lq-24.3 155-16.7 2.9 6 115 1.6 0.03 0.2 0

22 1 ltO 43.3 19-24.4 155-16.5 2.7 7 103 1.3 0.03 0.2 0

22 1 45 37.7 19-24.7 155-16.2 .3.4 7 242 1.4 0.25 1.0 1

22 1 46 4.1 lQ-?5.0 155-16.7 0.0*-0.5 10 112 0.5 0.04 0.2 

22 1 it 8 q.8 19-24.3 155-16.6 2.7 7 101 1.4 0.07 0.4 0

22 1 50 20.4 19-?4.8 155-15.2 4.1 6 274 3.8 0.51 1.9 122 1 54 10.2 19-75.0 155-16.67 0.0* 7 164 0.8 0.14 0.7 

22 1 55 1. 8 lq-24.2 L55-16.7 3.4 9 97 1.4 0.07 0.4 0

22 1 57 14.8 19-30.2 155-15.01 8.0* 0.5 8 328 10.0 1.00 6.1 

27 2 2 58.3 19-20.8 155-23.9 8.3 9 220 1.5 0.18 1.1 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR HN SEC lAT N LONG W OEP.TH MAG NO GAP OMIN ERr ERH E

JAN 22 2 5 43.5 19-24.2 155-16.5 2.9 9 102 1.5 0.05 0.4 0

22 2 1 41.9 19-24.6 155-16.4 3.1 1 217 1.2 0.13 0.6 0

22 2 11 58.1 19-30.8 155-14.81 8.0* 1.4 8 330 11.0 0.81 7.3 

22 2 19 23.4 19-23.9 155-16.6 3.1 0.3 12 98 1.1 0.07 0.5 0

22 2 20 10.'3 19-27.1 155-13.9 8.0* 5 318 8.4 2.06 9.1 

22 2 22 5.8 19-24.8 155-16.4 2.3 0.6 8 119 2.0 0.01 0.5 0

22 2 23 10.1 19-24.1 155-16.41 2.1 0.9 10 90 1.5 0.07 0'.4 0

22 2 31 24.6 19-28.1 155-11.8 8 •. 0* 7 328 10.8 1.46 6.0 

22 2 33 19.5 19-24.1 155-16.3 3.3 6 236 1.3 0.17 1.1 0

22 2 39 51.2 19-26.9 155-13.3 8.0* 5 326 1.4 1.38 6.5 

22 2 41 1.5 19-24.4 155-16.61 3.0 6 195 1.1 0.10 0.5 0

22 2 41 24.9 19-28.7 155-13.1 8.0* 7 326 9.8 1.40 5.1 

22 3 13 27.1 19-24.1 155-16.2 2.8 8 108 1.7 0.02 0.2 0

N 22 3 25 21.2 19-25.1 155-11.0 8.0. 5 289 0.4 0.24 4.3 

0 22 3 28 11.0 19-30.4 155-12.4 8.0* 7 331 13.0 2.63 10.3 

22 3 36 2.8 19-24.0 155-16.61 4.0 0.9 9 174 1.2 0.16 0.8 1

22 3 41 41.3 19-31.9 155-14.91 8.0* 1.3 1 333 12.9 1.19 10.4 

22 3 48 55.1 19-19.9 155-28.5 10.0 9 11t9 9.1 0.11 1.2 0

2'2 5 1 10.6 19-24.0 155-21.4 11.0 10 226 10.1 0.16 1.0 0

23 4 51 46.4 19-22.8 155- 3.1 4.2 2.2 16 188 11.2 0.19 1.2 1

23 5 0 32.9 19-21.0 155-12.9 9.8 1.2 16 181 1.8 0.09 0.8 0

23 11 8 40.1 19-20.5 155- 6.3 5.8 1.8 13 210 6.9 0.29 2.0 1

23 13 15 21.2 19-26.3 155-14.2 29.7 14 112 5.5 0.18 1.1 1

23 14 54 3.3 19-54.6 155-53.1? 41.7 3.4 12 256110.6 2.19 9.3 19

23 17 39 38.1 19-22.1 155-10.0 6.5 1.0 11 112 0.5 0.15 0.8 0

23 19 6 50.5 19-17.5 155- 1.1 5.0 15 237 13.0 0.31 1.9 1

23 19 16 11.8 19-24.1 155-16.4 3.2 0.9 11 91 1.6 0.04 0.4 0

23 21 59 21.8 19-23.5 155-16.9 14.0 1.7 11 55 0.2 0.04 0.5 0

23 22 9 38.4 19-20.6 155-11.5 10.7 15 191 3.4 0.11 0.9 0

23 22 26 38.1 19-23.1 155-16.5 14.2 1.3 14 66 0.8 0.08 0.9 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH 

JAN 24 1 52 50.4 19-19.7 155-18.5 7.4 1.8 11 151 2.1 0.10 0.8 

24 7 38 48.1 19- 4.4 155-21.3 14.0* 2.0 17 223 26.8 0.22 1.1 

24 10 18 11. 1 19-25.9 155-23.1 11.0 1.1 11 115 6.2 0.06 0.5 

24 14 18 36.1 19-28.8 155-53.1 11.8 2.0 11 188 5.9 0.26 4.3 

24 19 44 38.1 19-20.3 155- 1.5 7.3 2.0 13 229 15.1 0.34 2.0 

25 '7 20 41.8 19-19.2 155-11.8 21.8 1.3 13 179 5.7 0.21 2.2 

25 12 24 5.9 19-30.6 155-19.4 15.4 1.4 12 16 5.9 0.06 0.6 

25 13 58 55.3 19-19.7 155- 8.9 8.2 2.0 16 207 4,.4 0.20 1.3 

25 15 11 8.6 19-23.2 155-15.1 3.3 9 166 2.0 0.10 0.8 

25 15 24 51.9 19-20.2 155-13.1 9.9 15 192 3.8 0.10 0.8 

25 16 42 34.3 19-20.1 155-12.4 9.5 1.9 11 169 2.5 0.11 0.9 0

25 19 18 34.4 19-24.6 155-30.0 10.4 2.2 15 152 14.3 0.13 0.8 

26 0 49 41.1 19-25.1 155-30.4 22.6 2.4 15 151 14.5 0'.26 1.3 

N 26 4 52 29.0 19-31.4 155-16.1 19.0 2.4 12 253 11.4 0.44 3.6 4

26 6 0 36.4 19-10.0 155-34.3 3.3 2.8 11 136 10.3 0.12 0.8 

26 7 2 48.5 19-21.5 155-26.1 9.5 2.8 19 93 5.4 0.09 0.8 0

26 16 2 4.5 19-18.4 155-10.8 6.3 12 249 6.5 0.40 2.2 

26 18 58 13.6 19-16.8 155-23.6 6.4 12 154 6.4 0.12 0.9 

21 3 30 28.3 19-24.2 155-24.1 8.3 1.6 18 141 1.8 0.10 0.8 0

21 3 ,34 16.1 19-10.9 155-31.1 8.6 13 155 12.9 0.11 1.2 

21 8 51 28.1 19-11.4 155- 6.2 5.4 3.3 18 204103.2 0.33 1.1 

21 9 2 38.1 19-19.6 155-10.5 7.1 9 260, 4.2 0.49 2.8 

27 9 8 44.2 19-21.2 155- 9.9 8.0 1.8 16 250 1.2 0.18 1.1 0

21 9 9 9.1 19-16.9 155- 5.9 4.2 3.8 18 207104.3 0.30 1.4 

27 9 23 55.3 19-19.6 155-10.7 1.4 11 256 4.2 0.39 2.2 

21 12 17 46.6 19-19.0 155-14.2 8.3 1.9 16 204 5.6 0.17 1.1 021 13 29 0.3 19-19.9 155-15.1 1.9 13 201 3.1 0.14 0.8 0

21 15 41 36.0 19-18.6 155-16.0 8.2 15 199 3.1 0.15 1.0 0

27 1'7 15 49.0 19- 8.4 155-26.0 43.6 2.7 11 253 22.2 1.76 5.4 15

21 18 42 0.9 19-19.5 1.9 1.9 15 211 4.6 0.18 1.1 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SE'C LAY N LONG W DEPTH MAG NO GAP DMIN ERr ERH 

JAN 21 19 41 15.7 20- 2.1 155-21.5 6.7 2.8 19 232 30.3 0.52 2.0 

27 21 21 3.9 19-19.4 155-12.6 10.6 2.0 15 216 4.9 0.11 0.9 

27 21 31 54.3 19-23.6 155-11.6 15.0 11 60 1.4 0.08 0.1 

28 2 41 31.2 19-19.3 155-10.1? 10.5 10 211 4.1 0.44 2.6 

28 7 49 58."1 19-16.3 155-23.9 4.7 2.1 13 1'64 7.2 0.10 0.9 

28 16 ,.7 25.6 19-20.4 155-25.4 ,10.4 1.8 14 148 3.6 0.08 0.7 

29 0 11 38.4 19-20.4 155-12.1 9.9 15 195 2.9 0.10 0.8 . 

29 9 3 14.9 19-21.6 155-28.9 8.1t 2.4 13 135 10.1 0.12 1.1 

29 11 51 8.1 19-24.1 155-25.1 10.1 1.9 16 124 7.8 0.08 0 .• 1 0

29 18 lit 43.0 19-19.0 155-11.1 30.1 2.9 17 160 2.2 0.15 1.0 

29 19 43 20.9 19-20.8 155-12.3 9.1 1.9 15 190 2.3 0.13 0.9 

29 20 44 1.4 19-18.0 155-14.5 8.5 2.1 17 214 6.4 0.20 1.1 

29 20 55 11.9 19-18.5 155-13.3 10.6 10 222 6.4 0.19 1.5 0

NN 29 22 50 19.2 19-19.6 155-16.1 9.6 16 187 2.4 0.06 0.1t 0

30 1 28 50.8 19-19.2 155-14.1 9.5 1.9 16 199 5.2 0.08 0.6 0

30 3 6 20.2 19-43.8 155-54.0 8.7 11 293105.4 0.19 3.6 '

30 6 2 49.7 19-21.6 155-24.1 10.2 14 111 2.9 0.10 0.9 0

30 6 25 16.5 19-29.5 155-41.8 5.1 9 236 28.2 0.21 0.9 0

30 19 3 1.5 19-22.9 155-26.11 13.8 2.0 15 124 6.9 0.11 1.1 2

30 19 51 41.5 19-11.9 155- 7.5 6.4 2.4 15 219 8.5 0.35 1.9 

31 14 44 53.7 .19-22.0 155-26.9 9.8 2.6 11 116 7.1 0.10 0.9 0

31 18 1 36.9 19-25.8 155-32.9 31.0 2.3 1'3 114 18.4 0.35 1.1 4

31 20 10 19.8 19-37.1 155-11.0 22.6 1.6 12 158 17.4 0.28 1.4 5

31 20 44- 16.4 19-26.0 155-26.3 10.1 2.4 19 58 8.1 0.10 0.8 0

FEB 1 1 55 0.4 19-20.9 155-26.3 11.1 9 255 5.4 0.32 2.3 0

1 3 6 16.8 19-20.0 155- 0.6 9.4 1.9 15 243 16.8 0.32 1.8 0

1 18 26 6.1 19-26.9 155-24.4 9.7 1.9 13 115 5.6 0.05 0.5 0

1 21 12 10.2 19-45.7 155-21.41 13.0 2.5 12 228 10.4 0.52 5.3 4

2 6 28 49.2 19-16.7 155-24.1 6.3 16 157 6.6 0.12 0.9 

2 10 14 44.4 19-23.8 155-17.6 1.5 1 145 1.6 0.28 1.0 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

FEB 2 16 42 42.1 19-22.4 155- 6.1 5.2 14 201 6.9 0.21 1.7 

2 16 51 46.3 19-19.3 155-15.7 9.8 1.9 15 193 3.4 0.01 0.6 0

3 3 13 20.2 19-21.0 155-12.4 9.5 11 185 2.0 0.11 0.8 0

3 6 7 11.4 19-23.5 155-17.1 3.1 1.0 q 109 0.5 0.03 0.2 0

3 6 37 29.5 19-28.2 155-50.8 7.1 3.5 20 154 9.6 0.14 1.2 

#3 1 7 10.0 19-20.1 155-28.3 10.0 3.4 20 115 . 8.8 0.08 0.7 0

3 7 59 14.9 19-23.8 155-30.41 8.6 2.2 q 110 13.3 0.09 0.8 0

3 15 3 36.1 19-23.6 155-11.2 1.7 1.1 13 98 0 .• 1 0.14 0.9 0

3 18 11 23.1 lq-23.5 155-16.9 2.3 1.0 10 86 0.2 0.06 0.3 0

3 19 41 16.6 19-16.3 155- 8.1 3.9 2.4 16 225 13.4 0.42 1.9 

3 22 50 3.4 19-24.1 155-11.2 0.0 1.0 12 91 0.4 0.13 0.6 1

3 23 10 35.1 19-24.1 155-16.91 0.1 0.6 10 95 0.3 0.09 0.5 2

3 23 28 39.0 19-24.4 155-11.4 0.1 0.7 10 106 0.6 0.13 0.6 3

N 3 23 40 34.0 19-28.5 155-13.61 8.0* 2.0 q 216 8.q 1.07 7.3 

w

3 23 59 37.1 19-29.5 155-15.1? 8.0* 2.1 8 324 8.7 0.76 6.1 

4 0 2<) 44.6 19-23.6 155-11.1 5.6 2.5 14 99 0.1 0.09 0.6 0

4 1 5 24.6 19-23.6 155-17.2 6.1 2.1 20 53 0.9 0.06 0.6 0

it 1 15 24.4 19-23.4 155-11.1 1.8 6 143 0.6 0.06 0.2 0

4 1 20 6.4 19-23.4 155-11.2 1.9 6 148 0.8 0.21 0.5 

4" 5 11 32.6 19-23.1 155-11.2 2.0 0.9 9 101 0.9 0.06 0.2 0

4 6 8 25.2 1q-22.4 155-18.2 27.8 3.1 22 60 3.0 0.16 1.0 

4 7 47 3. 1 19-23.8 155-16.9 2.7 8 121 0.1 0.14 0.4 0

4 9 20 51.1 19-20.2 155-16.9 28.2 2.3 11 152 0.9 0.13 0.9 

4 15 4 48.5 19-19.6 155-13.0 8.5 17 198 4.4 0.18 1.3 0

4 16 59 29.4 19-24.3 155-15.6 2.8 8 198 2.6 0.12 0.1 0

4 19 51 16.2 19-23.2 155-11.1 2.8 9 152 0.7 0.06 0.3 0

4 20 42 56.9 19-24.6 15'5-1'1.4 0.3 0.9 11 15 0.3 0.11 0.5 

4 70 43 48.0 19- 1.6 155-21.81 32.1 11 249 26.3 0.25 1.9 3

4 20 56 59.6 20- 1.5 155-33.01 8.0* 15 233 15.6 0.24 4.2 

4 ?2 29 59.1 19-24.5 155-11.2 0.1 0.8 11 90 0.6 0.11 0.5 4
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH 

FEB 4 22 ·38 10.1 19-25.1 155-11.87 11.1* 1.6 1 158 0.7 1.60 11.8 

&) 0 20 53.3 19-20.4 155-28.4 8.2 3.5 20 112171.6 0.01 0.6 

C; 1 40 43.4 19-22.9 155-11.5? 0.5 9 110 1.4 0.18 0.8 

5 2 9 12.5 lq-l7.3 155- 6.1 3.1 16 224 10.1 0.38 1.8 

5 2 18 42.3 19-17.8 155- 7.6 5.8 1.3 18 219 8.5 0.33 1.7 

5 5 32 58.4 19-20.2 155-14.4 8.4 2.4 18 163 3.3 0.11 0.9 

5 6 59 59 •.3 19-23.3 155-16.1 2.5 -0.0 q 111 0.3 0.21 0.6 

5 1 26 31.5 19-24.'1 155-51.3 8.0* 6 295 39.• 9 1.23 7.8 

5 7 41 37.8 20- 6.8 155-38.21 13.3* 15 346 41.9 0.24 4.0 

5 12 7 0.7 155-20.37 10.0 2.0 18 85 9.4 0.13 1.1 

5 12 10 27.8 19-23.3 155-17.3 6.2 2.3 18 54 1.0 0.07 0.1 0

5 15 58 3q.3 19-21.9 155- 7.9 1.2 2.3 16 178 3.1 0.15 1.1 

5 16 35 43.1 19-23.7 2.3 0.8 10 115 l.e 0.03 0.2 0

5 18 49 10.6 19-23.7 155-11.3 1.5 1 106 1.1 0.09 0.2 

N

+:-- 5 21 23 57.9 19-23.1 155-11.3 2.3 0.7 13 56 1.0 0.09 0.6 

5 22 lq 24.1 lq-23.4 155-17.6 3.0 1.4 15 63 1.4 0.05 0.4 0

6 0 26 58.3 lq-23.9 155-16.11 3.0 0.1 8 109 1.5 0.04 0.3 0

6 0 32 14.5 19-23.2 155-16.9 5.3 1.7 14 92 0.5 0.11 0.1 0

6 L 59 ·7. 1 19-23.9 155-11.4 1.0 0.2 8 109 1.3 0.06 0.2 0

6 2 22 30.9 1<:1-23.6 155-22.4 9.2 1.1 14 158 4.1 0.14 0.8 0

6 3 2 46.0 19-23.8 155-11.1 2.0 1.2 12 99 0.9 0.07 0.5 0

b 4 39 59.9 19-23.6 155-15.3 3.3 0.7 11 95 2.5 0.14 0.7 

6 5 45 13.1 19-21.5 155-10.6 1.7 1.0 11 lq6 1.3 0.18 1.3 0

6 6 37 45.9 19-23.2 155-17.1 5.8 2.1 16 58 0.1 0.07 0.6 0

6 8 10 21.3 19-23.6 155-17.0 5.2 2.5 16 75 0.6 0.06 0.5 0

b 10 14 12.2 lq-23.6 155-11.3 2.1 7 105 0.9 0.03 0.1 0

6 12 37 9.3 19-23.4 155-17.2 2.2 6 144 0.1 0.10 0.2 0

6 14 12 21.6 19-23.4 155-17.4 2.1 9 73 1. 1 0.12 0.6 

6 20 3 29.3 19-23.6 155-14.7 3.3 8 190 3.0 0.07 0.3 0

1 1 38 16.8 19-23.3 155-17.5 2.9 1.6 13 62 1.2 0.05 0.3 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

FEB 1 It 5 30.3 19-23.3 155-15.1 3.0 0.4 10 90 2.3 0.05 0.3 0

1 6 22 9.3 19-23.6 155-15.2 4.1 1. 1 12 94 2.6 0.06 0.5 

7 8 0 56.4 19-22.1 155- 7.17 5.7 2.0 18 201 5.1 0.42 2.7 

1 11 48 43.4 lQ-24.0 155-15.6 3.8 1.5 10 224 2.3 0.11 0.6 0

7 18 18 18.1 19-20.5 155-17.3 30.0 1.8 17 109 0.8 0.12 0.9 

7 20 25 21.1 19-24.0 155-15.8 2.9 0.5 9 120 2.1 0.01 0.5 0

7 21 21 56.4 19-20.4 155-10.9 1.3 12 234 3.0 0.31 l.1 

7 22 43 51.1 19-23.6 155-17.3 5.0 2.1 14 58 0 .• 9 0.05 0.4 0

1 22 49 52.4 19-23.8 155-16.9 2.1 1.3 10 81 0.8 0.04 0.2 0

7 22 51 50.8 19-23.1 155-11.0 2.6 0.5 9 112 0.1 0.16 0.4 

7 22 58 46.6 19-23.2 155-11.4 1.5 0.4 9 102 1.1 0.05 0.2 0

8 5 31 43.7 19-21.9 155-12.4 3.8 8 159 0.1 0.11 0.1 

8 6 53 39.0 lq-23.3 155-11.1 2.6 0.9 12 94 0.5 0.03 0.2 0

tv 8 7 33 4q.9 19-10.5 155-21.6 9.5 15 173 18.5 0.11 1.0 0

U1 8 1 '35 58.8 19-23.3 155-15.1 2.1 9 89 2.2 0.05 0.4 0

8 8 19 10.3 lq-22.9 155-15.3 6.5 2.2 16 68 1.4 0.01 0.6 0

8 9 33 0.9 19-20.6 155-11.5 30.1 2.4 21 93 0.9 0.15 0.9 

8 9 36 19.1 lq-23.1 155-17.3 2.9 1.4 12 61 1.0 0.03 0.3 0

8 10 1 26.0 19-11.4 155-13.5 9.0 2.0 19 183 8.4 0.11 1.1 0

8 10 54 59.4 19-16.6 155-12.9 9.1 12 214 10.0 0.34 2.1 

8 11 32 32.5 19-23.5 155-16.2 5.1 1.8 15 73 1.0 0.08 0.5 0

8 11 58 41.8 lq-18.8 155-15.9 8.6 2.5 18 111 3.6 0.11 0.8 0

8 13 47 1.9 19-10.9 155-34.81 8.3 9 131 8.5 0.31 1.1 5

8 14 57 44.1 19-23.5 155-17.1 2.9 9 100 0.5 0.04 0.2 0

8 16 2 20.1 lq-22.8 155-14.4 3.0 q 103 2.3 0.06 0.5 0

8 16 15 45.6 19-18.9 155-10.3 8.0 1.8 15 208 5.5 0.28 1.8 

8 11 2 1. 3 19-22.8 155-15.3 6.0 2.2 14 11 1.4 0.08 0.6 0

8 19 42 23.3 lq-23.3 155-14.9 2.1 1.2 11 91 2.4 0.06 0.4 0

8 19 47 14.2 19-23.2 155-15.0 2.9 1.3 11 89 2.2 0.01 0.4 

8 20 16 46.2 19-23.1 3.0 1.3 10 85 1. q 0.01 0.4 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

FEB 8 20 11 32.9 19-24.5 155-14.1 13.2 2.5 21 53 4.1 0.06 0.7 0

8 21 23 1.8 19-23.1 155-15.0 3.1 11 86 2.0 0.06 0.5 0

9 0 11 58.3 19-22.8 155-14.9 4.5 1. 1 12 86 1.8 0.10 0.5 0

q 0 39 16.1 19-23.4 155-15.3 2.1 10 90 2.2 0.06 0.3 0

9 1 26 3.8 19-23.2 155-17.3 2.8 1.1 12 61 1.0 0.05 0.3 0

C} 2 36 3.9 19-23.1 155-17.1 3.0 1.4 14 58 0.1 0.03 0.2 0

9 2 58 9 19-21.1 155-25.7 6.9 16 114 11.6 0.09 0.1 0

9 3 4 10.1 19-22.9 155-15.3 5.9 2.2 16 78 1.• 3 0.06 0.4 0

9 3 35 2.9 19-23.4 155-17.61 1.9 0.9 9 81 1.4 0.34 1.1 2

9 4 22 54.8 19-19.3 155-14.7 8.6 3.0 19 172 4.8 0.12 0.9 0

q 4 24 20.6 19-19.6 155-14.6 8.4 2.3 19 169 4.2 0.10 0.7 0

9 4 26 54.5 19-18.7 155-14.0 10.3- 15 221 6.2 0.13 0.9 0

N 9 5 33 24.1 19-23.5 155-11.2 1.8 7 142 0.8 0.04 0.1 0

(J'\ 9 9 10 10.Q 19-23.8 155-16.2 4.0 1.0 13 84 1.3 0.08 0.4 0

9 9 12 34.1 19-27.5 155-11.41 8.0* 8 329 10.9 0.91 1.5 

9 9 28 1.2 19-24.6 155- 8.9 8.0* 7 329 12.3 1.71 6.8 

9 9 44 1. 3 lq-23.1 155- 8.7 8.1 10 287 3.4 1.38 4.3 5

9 q 50 33.6 19-23.1 155-15.5 4.0 1. 3 11 143 1.5 0.12 0.6 

9 10 5 16.8 19- 9.5 155-34.9 1.9 14 144 10.7 0.11 1.2 0

9 11 19 42.6 19-23.4 155-11.2 2.3 7 92 0.1 0.01 0.2 0

9 13 26 36.4 19-23.2 155-17.0 1.9 0.3 9 94 0.5 0.18 0.6 

9 14 29 7.6 19-18.4 155-15.1 9.6 1.9 13 206 5.1 0.16 1.2 0

9 14 43 39.5 19-26.4 155-26.81 10.8 2.4 16 74 8.8 0.10 0.9 0

9 14 Cjq 58.5 19-23.5 155-17.-1 2.6 6 140 0.6 0.05 0.1 0

9 15 15 34.5 1'1-24.1 155-11.21 0.2 0.9 9 1.32 1.2 0.41 1.2 7

q 15 22 51.0 lq-23.8 155-16.0 5.2 1.3 13 150 1.6 0.13 0.6 1

9 15 25 51.8 19-20.6 155-13.3 8.4 13 188 2.8 0.13 1.0 0

9 16 13 49.9 19-24.1 155-14.5 2.9 1 214 4.0 0.10 0.5 0

q 11 21 33.6 lq-23.3 155-17.0 5.6 2.4 14 60 0.3 0.08 0.5 0

9 18 26 37.4 lQ-32.0 155-14.3 2.2* 1.6 7 333 13.5 0.94 5.7 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DHIN ERT ERH E

FEB 9 19 23 16.9 19-22.1 155-23.9 11.0 1.3 15 11 4.1 0.08 0.5 

9 20 48 13.5 19-23.6 155-16.8 2.3 0.6 10 120 0.3 0.12 0.4 

9 21 1 53.3 19-24.2 155-17.61 0.0. 0.8 8 125 0.9 0.08 0.5 

9 21 8 48.7 19-22.5 155-14.8 6.5 1.5 15 109 1.5 0.08 0.5 0

9 21 10 11.9 19-23.3 155-15.0 2.7 9 98 2.2 0.05 0.4 

9 21 14 35.1 19-23.5 155-11.3 2.9 0.9 13 59 0.9 0.03 0.3 

9 21 26 24.0 19-23.9 155-11.4 1.6 6 128 1.3 0.05 0.1 

9 22 31 49.3 19-23.4 155-11.1 2.1 0.8 11 91 0,.6 0.03 0.2 

9 23 19 13.0 19-23.5 155-14.8 2.2 10 96 2.8 0.04 0.4 

9 23 31 8.5 19-16.2 155- 6.9 1.2 1.4 14 245 11.6 0.52 2.6 9 23 1t2 50.5 19-55.8 155-36.6 1.8 9 315 23.5 0.33 3.8 

10 0 0 29.7 19-23.0 155-15.1 4.2 1. 1 12 83 1. 1 0.09 0.5 

10 0 11 39.3 19-19.3 155-12.3 11.1 10 234 5.1 0.24 1.5 

I\.) 10 0 31 5.1 lq-ll.6 155-13.2 11.8 9 249 8.2 0.34 2.0 

""-J 10 0 36 20.3 19-20.2 155-16.8 32.1 11 188 1.0 0.11 1.1 

10 0 46 56.6 19-23.0 155-15.2 4.9 1.4 12 82 1.6 0.13 0.5 '

10 2 36 23.1 19-23.4 155-11.1 5.1 2.3 18 52 0.6 0.06 0.6 

10 2 39 11.5 19-23.4 155-14.8 2.2 1.2 12 92 2.1 0.01 0.5 

10 5 55 30.7 19-19.8 155-12.7 10.8 14 212 4.0 0.09 0.8 

10 6 46 6.5 '19-23.3 155-17.0 2.6 0.9 11 91 0.3 0.05 0.3 

10 8 35 0.3 19-23.6 155-14.4 3. 1 7 198 3.4 0.05 0.3 

10 9 52 18.4 19-24.1 155-15.8 6.1 2.6 16 85 2.2 0.01 0.6 

10 10 56 51.9 lCJ-23.5 155-11.1 3 .• 0 0.1 8 106 0.5 0.03 0.2 

10 14 1 51.0 19-24.3 155-16.5 3.2 1.2 9 150 1.4 0.09 0.5 

10 14 26 6.8 19-21.1 155-12.5 8.2 1 185 1.8 0.06 0.6 

10 14 39 1.5 19-24.1 155-16.0 5.5 8 209 1.9 0.53 1.6 

10 18 42 56.0 19-23.2 155-17.2 2.1 1 152 0.1 0.13 0.4 

10 19 44 42.9 19-23.1 155-14.5 0.2* 0.7 10 89 2.8 0.04 0.3 10 20 22 21.9 19-23.3 155-11.41 2.1 0.3 10 15 1.1 0.16 0.1 

10 21 13 21.0 19-23.1 155-15.1 2.8 0.6 11 85 1.9 0.08 0.6 
SUMMARY OF SEISMIC EVENTS CCONT I NlJED )

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP ERr ERH E

FE8 10 21 49 27.9 19-23.6 155-11.0 2.4 1 133 0.6 0.03 0.2 0

10 22 51 48.1 19-24.5 155-16.5 0.0* 0.5 10 104 1.1 0.04 0.2 

10 23 28 36.0 19-23.4 155-15.1 2.1 q 91 2.3 0.09 0.5 

11 a 30 36.1 19-23.8 155-16.9 2.2 0.0 9 91 0.1 0.10 0.5 0

11 0 46 45.3 19-23.2 l5S-11.2 3.0 1.3 13 60 0.8 0.04 0.3 0

11 1 6 39.1 19-23.5 155-15.4 3.0 8 131 2.2 0.06 0.3 0

11 1 53 54.1 lq-23.1 155-15.1 4.3 0.9 14 84 1.9 0.08 0.4 0

11 1 55 43.2 19-23.5 155-16.6 2.6 1.4 14 62 0,.3 0.06 0.4 0

11 2 11 31.3 19-20.3 155-13.7 8.0 0.9 13 201 3.6 0.16 1.0 0

11 4 14 45.4 19-20.0 155-12.5 10.8 11 211 3.7 0.12 1.0 011 4 15 1.5 19-23.5 155-15.1 2.9 9 95 2.5 0.05 0.3 0

11 4 19 9.6 19-19.1 155- 8.2 9.3 9 224 5.9 0.26 1.9 

11 4 59 11.7 lQ-24.0 155-14.7 4.4 8 206 3.1 0.20 0.6 1

N 11 5 14 54.2 19-24.1 155-14.7 3.0 8 207 3.7 0.08 0.4 0

00 11 21 45 36.9 20-16.9 156- 0.7 18.1* 2.3 20 328143.6 0.26 2.6 

11 21 Sq 19.1 19-24.7 155-23.3 9.5 2.1 16 139 6.6 0.09 0.7 ·

11 23 2 11.6 19-2'3.6 155-23.2 10.3 2.2 18 102 6.1 0.08 0.8 0

12 2 51 49.0 19-15.4 1.54-60.0 4.1 1.8 14 266 21.1 0.11 3.5 1

12 3 35 44.9 19-22.1 155-15.21 0.0* 7 141 1.4 0.11 0.6 

12 4 58 3.5 20- 0.1 156-36.2 3.8 2.6 24 249184.6 0.34 3.9 4

12 6 17 31.3 19-26.6 156-26.61 3.0 3.3 15 325124.1 1.27 23.2 16

12 6 41 24.8 19-20.2 155-12.9 8.5 13 196. 3.3 0.13 1.1 0

12 11 24 3.6 19-23.8 155-23.2 10.3 2.1 16 86 6.2 0.08 0.8 0

12 18 10 56.3 19-19.3 155-14.0 10.1 3.2 18 114 5.2 0.11 0.9 0

12 22 46 29.4 lq-26.5 155-25.9 10.3 2.2 19 16 7.7 0.07 0.7 0

12 23 8 34.8 19-18.9 155-13.9 9.1 1.9 11 201 5.8 0.12 0.9 0

12 23 55 33.4 19-19.6 155-14.1 9.9 16 191 4.5 0.10 0.1 0

13 3 55 25.2 19-51.1 155-26.5 9.4 2.2 B 206 19.4 0.11 4.1 2

13 5 6 11.8 19-18.3 155-14.6 8.2 2.5 17 184 5.9 0.14 1.0 0

13 1 31 32.1 19-56.6 155-25.5 7.9 5 336 18.1 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

FEb 13 1 55 2.1 19-1q.5 155-13.9 8.5 15 199 4.8 0.15 1.1 0

13 8 50 10.9 19-15.5 155-22.91 12.1 9 300 8.1 1.30 4.0 6

13 11 22 1"3.2 19-22.8 155-15.0 19.2 11 231 1.1 0.30 1.6 2

13 11 29 27.4 19-20.9 155-14.0 11.1 1.8 12 178 2.9 0.07 0.8 0

13 13 31 40.1 19-19.2 155-13.8 9.9 12 205 5.5 0.11 0.9 0

13 19 21 49.3 19-25.4 155-29.4 6.2 1.8 12 102 12.3 0.09 0.7 0

13 20 2 49.4 19-24.3 155-24.8 10.8 2.0 15 144 9.1 0.08 0.1 0

14 2- 40 35.2 19-21.1 155-11.5 9.6 1.0 13 192 2.8 0.15 1.3 0

14 3 6 10.1 19-24.3 155-24.4 11.6 1.0 11 204 0.20 0.9 

14 3 28 22.4 19-22.5 155-25.9 13.1 2.0 15 121 11.0 0.11 1.2 

14 4 54 0.2 19-18.6 155- 2.71 0.1 2.1 13 232 22.8 1.04 2.0 4

14 5 31 14.3 19-19.2 155-11.3 11.0 8 223 5.3 0.20 1.6 

14 5 52 29.4 19-18.9 155-10.9 9.8 9 206 5.5 O.2Q 2.1 

14 9 13 3.1 19-24.3 155-25.2 13.6 9 222 8.2 0.43 1.5 

14 9 41 19.2 19-24.5 155- 8.2 5.8 3.0 15 143 6.0 0.11 0.9 

N

\.0

14 15 35 26.4 19-20.1 155-28.1 1.5 10 143 15.6 0.11 1.0 1

14 11 13 3.3 lQ-24.0 155-24.8 11.4 1.2 13 195 1.6 0.08 0.6 0

14 19 0 32.8 19-24.3 155-14.1 29.6 1.6 15 133 4.8 0.20 1.3 

14 23 54 46.8 19-17.9 15'5- 8.5 11.2 1.3 13 232 1.6 0.38 2.4 0

15 0 .36 39.1 19-16.9 155- 1.6 12.0 9 292 9.9 0.56 3.5 

15 1 5 16.7 19-53.8 155-11.51 85.2* 12 294 45.4 4.91 50.4 

15 2 57 39.4 19-24.5 155-24.0 10.9 2.2 17 81 7.1 0.09 0.8 0

15 5 6 5.4 19-20.4 155- 1.9 1.9 1.2 11 235 14.4 0.34 2. 1 0

15 19 53 2L.9 19-21.8 155-26.1 9.7 1.9 12 124 6.6 0.09 0.1 0

16 0 56 51.6 19-10.4 155-33.21 7.9 1.9 16 146 10.1 0.11 2.3 

16 5 48 30.2 19-20.5 155-19.7 4.8 8 165 4.1 0.16 0.5 

16 6 2 5.4 19-24.0 155-25.9 8.1 10 151 8.3 0.13 0.9 

16 20 51 51.4 19-23.5 1')')-24.3 q.9 1.9 16 118 6.3 0.09 0.7 0

11 2 56 58.4 19-51.3 155-41.11 8.8 1.9 19 184 19.5 0.38 5.1 1

17 4 58 19.C 19-20.Q 155-13.9 9.9 16 119 2.9 0.01 0.6 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W OEP.TH MAG NO GAP ERT ERH 

FEB 17 14 .31 52.0 19-24.8 155-23.8 11.1 2.2 16 63 7.4 0.05 0.5 

17 1q 24 41.8 19-24.7 155-25.1 6.5 1.9 14 126 8.9 0.11 1.4 

11 20 42 35.2 19-22.3 155-16.2 21.3 3.4 19 88 0.6 0.19 1.2 

18 10 51 31.0 19-21.8 155-11.5 22.5 16 86 3.0 0.16 0.9 

18 12 13 54.6 19-22.0 155-16.8 23.6 2.5 15 101 1.1 0.11 1.0 

18 19 20 12.3 19-26.1 155-49.8 1.6 2.1 18 181 13.5 0.10 0.9 18 20 15 10.3 19-50.3 154-58.71 8.0* 6 310 39.5 1.54 65.6 

18 22 58 22.8 19-21.0 155- 5.1 5.8 2.4 14 209 0.29 2.0 

18 23 12 32.4 19-55.4 156- 2.3 8.0* 6 315 63.2 4.58 21.8 

19 2 5 37.0 1Q-20.5 155-11.0 1.7 14 222 2.9 0.16 1.1 

19 4 43 14.0 19-21.4 155-16.4 30.b 2.1 17 130 2.2 0.24 1.4 

19 1 37 14.5 19-20.6 155-15.3 23.2 14 118 3.5 0.20 1.4 

19 10 41 32.3 19- 1.8 155-21.3 35.3 9 270 21.6 1.61 6.0 1

w 19 10 41 34.8 19-11.9 155-28.91 24.3 2.2 11 110 10.8 0.72 3.1 

0 19 10 43 4.2 19- 9.6 155-26.8 29.4 10 256 20.4 1.04 4.0 

19 12 57 59.8 19-22.4 155-16.0 28.8 17 93 0.2 0.20 1.2 

19 13 45 2.0 19-21.7 155-11.4 22.3 2.1 16 91 2.8 0.15 0.9 

19 14 53 50.4 19-14.3 155-47.51 13.5* 14 305 18.3 0.51 3.4 

19 15 8 19.3 lQ-40.4 156-14.21 8.0* 2.3 16 289108.6 2.96 20.1 

19 18 46 6.6 19-30.7 154-59.5 8.5 7 214 7.1 0.52 10.6 

19 23 .30 15.1 19-18.9 155-14.3 9.1 1.7 11 206 5.6 0.12 0.8 

20 16 22 55.5 19-20.9 155-10.2 7.8 14 248 1.1 0.14 1.0 

20 17 40 21.2 19-22.1 155-26.4 12.1 1.8 12 146 6.5 0.11 0.8 

20 20 28 10.4 19-20.1 155-11.2 7.6 0.8 10 225 0.4 0.15 0.8 

20 20 59 25.3 19-48.5 155-30.2 8.0* 8 302 35.6 1.21 1.5 

20 21 13 23.4 19-44.6 155-21.1 1.8 11 150 3.6 0.14 1.1 0

20 21 50 41.C1 19-21.8 155-16.2 25.8 2.1 16 124 1.3 0.11 1. 1 

20 22 25 17. 1 lQ-45.0 155-29.8 7.6 10 224 5.3 0.11 1.4 0

20 22 34 52.9 19-29.4 15"5- 0.41 8.0* 12 181 8.0 4.51 28.3 

21 0 42 24.6 19-22.9 155- 2.21 0.5 2.3 13 212 16.0 0.79 1.1 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAY N LONG W DEPTH MAG NO GAP DMIN ERr ERH 

FEB 21 8 21 58.1 19- 1.1 155-35.1 6.1 10 292 14.9 0.82 3.8 

21 11 55 28.1 19-24.9 155-21.9 10.3 1.2 10 190 12.1 0.10 0.9 

21 12 27 48.0 19-21.4 155-13.3 12.9 1 169 1.4 0.25 1.1 

21 13 4 53.7 19-18.2 155- 6.1 11.2 11 235 9.6 0.43 2.9 

21 14 3 51.2 19-21.1 155-14.3 8.5 1.1 14 169 2.1 0.13 1.0 

21 14 21 39.4 19-19.1 155-26.8 8.9 8 163 6.4 0.18 1.9 

21 16 35 20.9 20- 4.7 155-19.9 3.1 2.6 19 245 35.8 0.39 1.8 

21 16 48 17.9 19-15. 9 155-21.0 6.7 13 214 8 .• 9 0.18 1.0 

21 23 24 46.8 19-23.8 155-23.1 6.2 1.0 10 114 5.9 0.17 0.6 

22 1 48 18.8 19-29.4 154-53.7 6.8 2.7 10 281 3.8 0.40 2.3 

22 3 9 50.3 19-24.2 154-45.91 0.1 2.1 14 303 42.9 21.7 5

22 q 37 31.8 19-22.8 155-29.5 14.3 9 198 11.9 0.14 1.3 

22 9 '38 1.6 19- 5.5 155-15.9 19.1* 10 315 21.0 1.85 11.4 

w 22 9 41 24.9 19-19.7 155- 4.8 10.4 1.2 11 213 9.9 0.16 4.1 

22 11 9 23.8 19-20.3 155-25.3 12.0 9 151 3.4 0.18 1.6 

22 11 53 8.4 19-21.6 155-11.4 8.3 1.2 12 174 2.5 0.11 1.1 

22 12 1 44.9 19-24.2 155-28.4 6.4 1.8 12 110 13.6 0.08 0.6 

22 12 25 40.4 18-58.2 155- 4.9 8.0* 2.3 16 283 44.5 0.66 4.1 

22 14 50 21.8 19-20.6 155-19.9 3.2 7 163 4.5 0.17 0.1 1

22 16 0 26.1 19-23.2 155-29.1 9.2 8 111 15.1 0.10 0.8 

22 11 31 13.6 19-28.1 155-23.5 11.8 1.3 12 102 2.1 0.05 0.6 

23 1 33 44.9 19-20.1 155-25.1 8.6 9 201. 3.3 0.25 1.4 

23 3 2 18. 3 19-49.6 155-48.9 7.9 3.0 18 190100.2 0.20 1.8 

23 3 21 43.2 19-22.0 155-25.5 11.1 9 138 5.1 0.11 0.9 

23 4 51 34.6 19-21.3 154-50.5 5.0 2.3 12 295 9.9 1.29 6.2 2

23 5 33 11.4 19-20.4 155- 8.5 8.5 15 205 3.7 0.31 2.1 

23 14 33 50.5 19-23.5 155-16.9 15.1 2.3 17 56 0.2 0.08 0.8 

23 16 8 38.1 19-22.1 154-43.57 0.2 3.5 15 311 25.1 8.44 15.6 2

23 22 23 20.6 19-54.1 155-41.01 8.0* 2.9 18 178 13.4 0.60 6.1 

24 4 4 57.2 19-22.2 155-22.6 9.6 2.1 16 108 4.0 0.08 0.1 0
SUMMARY OF SE I SM Ie EVENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERr ERH 

FEB 24 11 33 14.6 19-22.3 155- 4.5 3.6 2.0 15 206 14.6 0.19 1.2 

25 16 28 21.1 19-1q.4 155-15.6 10.3 1.9 14 193 3.5 0.06 0.6 

26 0 23 20.1 lQ-20.4 155-16.0 33.1 3.0 19 111 2.5 0.22 1.'2 

26 3 33 54.5 19-25.0 155-14.6 31.2 2.4 18 17 4.2 0.15 0.8 

26 1 41 33.9 19-12.5 155- 5.8 1.7 12 265 18.7 1.65 3.5 

26 8 41 21.4 19-21.6 155-14.3 9.2 2.9 20 142 1.8 0.08 0.1 

26 9 33 8.0 19-21.0 155-14.1 7.8 14 176 2.5 0.14 1.0 

27 1 1 53.9 19-21.7 155-51.2 6.2 " 1.6 16 178 9.7 0.12 1.2 

21 2 27 36.5 19-25.4 155-14.6 29.8 17 81 5.3 0.14 0.8 21 3 42 59.0 19-20.3 155-25.5 11.5 1.7 19 118 3.9 0.07 0.1 

27 '7 45 35.4 lq-49.5 155-28.4 q.9 12 323 5.6 0.67 4.8 

77 8 21 28.2 19-25.4 155-14.6 29.5 1. 1 17 107 4.3 0.14 0.8 

27 11 6 36.1 19-22.5 155-13.2 29.3 2.1 21 86 1.2 0.17 1.1 

w 27 12 6 26.6 19-23.1 155-22.57 11.0 1.9 16 66 4.9 0.01 0.6 

N 27 12 14 8.4 19-24.0 155-23.0 10.5 1.4 9 166 5.9 0.10 0.8 

27 17 ·33 23.4 19-20.6 155-15.9 12.1 1.0 11 184 2.4 0.11 0.<) 

21 21 14 46.8 19-21.6 155-10.2 1.5 10 220 0.5 0.23 l.l 

27 21 17 34.1 19-19.2 155-13.1 9.2 1.0 15 199 5.4 0.12 0.9 

21 23 58 9.3 19-25.8 155-14.5 29.2 1.6 16 84 5.4 0.16 o.q 

28 1 26 33.0 19-22.2 155-16.2 25.0 1.5 13 94 0.7 0.24 1 .2 

28 2 40 21.3 19-17.9 155-14.1 7.1 II 240 1.5 0.29 1.5 

28 3 48 2q.3 lq-18.7 155-13.7 10.4 1.8 l5 201 6.3 0.10 0.7 

28 4 38 1.4 19-19.6 155-11.4 11.1 11 216 4.7 0.13 1 • 1 

28 5 6 54.3 19-14.1 155-22.1 8.4 13 193 13.8 0.15 1. 1 

28 6 15 14.1 lq-19.2 155-13.0 14.8 9 228 5.1 0.06 0.6 

28 6 21 1.3 19-21.4 155-12.6 8.1 13 174 1.2 0.16 0.9 

28 14 41 45.3 19-20.9" 155-13.2 7.5 10 186 2.2 0.15 1 • 1 

28 11 33 36.2 19-18.4 155-16.8 9.q 1.8 15 198 3.4 0.16 1.3 

28 21 33 53.0 19-19.1 155- 1.1 7.2 1.2 10 22q 7.1 0.33 2.0 

MAR 1 3 9 59.1 19-16.q 155- 3.8 8.2 11 248 14. 1 0.41 2.3 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERY ERH E

MAR 1 4 39 38.8 1q-19.4 155-16.1 9.4 0.9 14 194 2.6 0.10 0.8 0

1 11 54 11.2 19-18.1 155-14.1 26.9 15 174 5.4 0.20 1.5 1

1 19 53 16.9 19-25.5 154-48.1 1.0* 2.0 9 303 14.0 0.28 1.8 

2 1 4 10.5 19-19.1 155-15.4 7.9 1.5 18 163 3.5 0.08 0.6 0

2 4 53 55.3 19-19.6 155-19.9 29.1 14 146 4.4 0.12 0.1 1

2 6 0 41.5 19-23.1 155-24.8 1.2 1.8 9 121 6.q 0.15 1.5 1

2 1 40 15.2 19-24.1 154-57.47 8.0* 9 309 23.7 7.09 42.5 

2 13 43 14.8 19-24.8 155-25.1 11.3 11 141 0.01 0.7 0

2 14 30 2.9 20- 4.q 155-39.61 8.0* 4."0 26 163113.2 9.49 66.0 

2 15 13 22.0 lq-18.1 155-13.8 8.4 1.9 19 205 1.4 0.21 1.3 0

2 19 6 45.6 19-17.4 155-14.2 10.0 10 232 7.5 0.26 1.7 0

2 19 30 11.4 19-21.0 155-16.2 30.4 3.3 20 145 2.1 0.11 1.0 1

3 2 22 42.3 19-21.1 155-16.2 28.0 11 145 2.0 0.11 1.1 1

w 3 8 20 1.8 19-22.8 155-23.0 9.0 2.5 16 10 4.7 0.01 0.6 0

w

"3 8 42 40.0 19-19.6 155-13.8 10.0 2.4 16 191 4.8 0.13 1.0 0

3 12 50 20.6 19-21.2 155-12.2 8.3 2.6 11 158 1.8 0.12 0.9 0

3 13 41 12.8 19-24.9 154-'50.9 1.3 11 301 11.6 1.12 6.4 1

3 16 12 25.3 19-1q.7 155-10.9 1.8 1.9 15 237 4.2 0.20 1.3 0

3 16 30 4.6 19-54.3 155-22.2 38.1 2.9 19 203 16.7 0.30 1.5 3

3 16 45 14.4 19-55.0 155-22.3 38.9 2.8 11 206 17.7 0.35 1.7 3

3 16 51 28.0 19-10.7 155-32.8 8.6 2.5 11 144 10.8 0.09 0.8 0

3 18 38 10.9 19-21.2 154-52.2 5.0 2.0 6 295 3.7 0.69 3.9 1

3 19 30 53.1 19-25.1 154-51.11 2.4 2.1 8 281 1.6 0.80 3.4 2

3 20 0 40.3 19-21.8 154-52.6 4.8 2.8 19 283 2.4 0.39 2.2 0

3 20 50 12.3 19-18.3 155-16.4 7.9 2.0 18 113 3.1 0.12 0.8 0

4 1 25 1.1 19-21.0 154-52.51 8.0* 9 214 14.7 0.68 9.3 

4 5 lq 41.9 19-21.1 155- 3.2 1.2 .2.5 21 191101.3 0.24 1.7 04 10 21 20.9 19-26.5 154-52.4 5.5 2.0 9 216 4.1 0.59 3.8 1

4 13 23 53.1 19-19.q 155- 1.6 4.8 2.2 16 221 15.2 0.35 2.1 1

4 16 27 33.4 19-22. 3 155-24.0 10.8 1.9 16 76 4.1 0.01 0.7 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

MAR It 16 51 36.2 1<J-22.6 155-25.3 11.9 16 93 5.1 0.09 0.8 1

4 19 36 34.9 19-20.7 155- 1.1 6.1 2.1 18 201 5.6 0.22 1.4 0

4 21 0 34.1 19-27.4 154-53.5 4.5 2.3 14 249 2.8 0.31 2.3 1

5 3 1 0.2 19-21.2 155- 1.4 2.0 13 214 15.2 0.59 1.4 2

5 3 32 29.4 19-24.0 154-58.51 0.3 1 224 10.5 0.31 2.0 2

5 ,. 11 6.5 19-30.1 154-52.11 8.0* 1 319 3.2 0.42 4.3 

5 12 57 32.8 19-20.5 155- 9.6 1.4 10 260 2.5 0.29 l.8 1

5 13 42 58.6 19-13.0 155-23.6 29.8 12 191 13.4 0.42 1.4 4

5 15 9 38.4 19-.38.2 155-11.3 35.4 2.0 18 109 13.9 0.23 0.8 2

5 15 53 18.4 19-31.8 155- 2.71 10.5* 12 319 13.6 1.21 6.5 

5 18 22 16.0 19-20.3 154-51.0 1.7 10 247 16.4 0.94 2.6 3

5 19 9 3.5 19-12.0 155-2q.3 31.5 1.9 16 166 14.1 0.30 1.2 3

6 2 3 28.3 19-18.8 155-10.9 7.1 13 261 5.8 0.35 1.9 0

w 6 2 24 59.0 19-19.9 155- 9.4 7.6 16 200 3.8 0.18 1.2 0

6 3 47 0.9 19-19.4 155-11.5 34.9 13 184 1.3 0.14 0.1 1

6 6 43 46.4 19-21.3 154-51.8 4.8 2.6 19 280 4.0 0.12 3.6 1

6 9 42 23.1 19-20.4 155-16.3 8.6 9 220 2.0 0.07 0.4 0

6 15 44 54.0 lq-22.7 155-23.9 121.0 13 11 4.7 0.01 0.7 1

6 19 11 18.1 19- 4.0 155- 0.81 8.0* 17 212 36.6 0.60 4.0 

6 22 12 28.8 19-25.9 155-31.1 33.2 12 117 8.9 0.93 2.8 9

1 3 7 1.2 19-25.4 154-53.91 0.9 3. 1 20 235101.7 1.09 4.1 3

1 3 48 44.1 20-30.0 155-24.11 8.0* 2.7 18 309129.7 5.93 

1 4 26 30.9 19-20.9 155-13.5 8.2 15 183 2.4 0.16 0.9 0

7 8 28 58.3 19-26.5 154-52.81 8.0* 2.0 11 268 4.6 1.41 9.1 

1 10 19 51.6 19-25.5 155-24.3 13.0 8 123 1.4 0.10 0.6 1

., 12 1 20.8 19-27.5 154-52.2 6.0 2.3 8 291 3.3 0.35 2.3 0

1 12 48 24.4 19-21.1 155-28.1 13.9 2.2 10 223 8.6 0.28 1.4 3

8 3 4q 7.1 19-22.3 155-29.01 10.3 2.1 13 115 10.8 0.08 0.9 2

8 7 36 24.9 19-23.6 155-13.9 29.1 11 101 3.5 0.23 1.4 2

8 8 8 42.1 19-23.3 154-58.6 6.3 6 222 11.9 0.59 3.3 2
SUMMARV OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC lAT N LONG W OEP.TH MAG NO GAP DMIN ERr ERH E

MAR 8 8 38 16.4 19-19.3 155- 7.5 10.9 14 219 6.3 0.22 1.1 0

8 13 0 26.9 1q-23.6 155-24.1 8.2 2.2 21 52 6.5 0.10 0.9 0

8 15 5 31.0 19-11.1 155-36.9 10.1 2.1 8 141 6.9 0.11 1.9' 1

8 11 5 7.2 19-23.7 155-25.2 ll.5 16 19 1.2 0.05 0.5 

8 17 15 48.1 19-20.6 155-12.8 8.1 2.4 21 166 2.5 0.14 1.0 0

9 0 59 45.6 19-22.5 155- 2.81 10.4 2.0 9 215 12.1 0.22 1.7 09 16 12 36.3 19-26.4 155-22.0 9.7 2.2 14 109 3.2 0.01 0.8 0

9 20 50 12.7 19-20.5 155- 1.7 7.8 2.2 19 201 4.6 0.21 1.5 0

9 22 49 30.3 19-26.2 155-21.3 11.5 2.4 11 16 0.04 0.5 0

10 0 45 59.1 19-25.3 155-16.1 2.9 1.2 12 114 0.9 0.06 0.5 0

10 4 51 8.1 19-21.3 155-12.0 8.9 1.1 19 151 1.9 0.10 0.9 0

10 18 9 32.3 19-27.1 154-58.11 8.0* 11 181 5.5 2.0Q 12.9 

11 12 9 48.6 19-19.1 155-12.0 1.1 9 246 6.1 0.49 1.8 3

w 11 12 41 34.8 19-19.8 155-23.7 31.6 12 162 1.0 0.95 2.2 8

lJ1

11 12 51 51.1 19-20.1 155-25.81 9.5 10 154 4.5 0.26 2.3 

11 14 41 38.2 19-48.2 155-22.91 23.5 2.0 16 218 8.2 0.35 1.9 4

11 11 22 50.6 19-24.2 155-25.6 12.5 1 230 8.4 0.39 1.7 3

11 18 2q 36.1 19-23.2 155-41.6 7.9 12 241 23.9 0.36 1.1 0

11 19 6 46.4 19-18.5 155-17.0 30.7 12 167 7.4 0.22 1.5 2

11 21 42 57.4 19-12.8 155-26.11 8.0* .5 251 15.0 1.01 5.5 

11 21 49 21.5 19-18.2 155-15.9 9.6 1.5 17 204 4.4 0.12 0.8 0

12 0 34 12.9 19-20.5 155-26.5 1.0 13 115 5.7 0.10 0.8 

12 1 38 12.5 19-59.3 155-34.8 10.8 2.5 17 189102.8 0.14 2.5 2

12 3 11 59.3 19-21.8 155-10.5 6.4 12 111 0.9 0.18 1.0 0

12 5 9 8.6 19-20.2 155-26.0 1.8 9 228 4.8 0.32 1.1 

12 5 16 16.2 19-20.1 155-26.1 1.6 11 153 5.0 0.16 1.1 

12 1 24 22.9 19-20.3 155-12.8 8.5 1.1 18 206 3.1 0.16 1.1 0

12 8 33 36.5 19-23.6 155-14.9 5.9 10 168 2.8 0.11 0.6 

12 8 36 28.0 19-27.4 154-49.21 8.0* 1.1 8 299 1.9 1.08 8.1 

12 8 31 19.7 19-14.3 154-49.41 8.0* 1.7 8 299 11.0 0.60 5.0 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEP.TH MAG NO GAP DMIN ERT ERH E

MAR l2 10 34 15.1 19-21.9 155-14.6 21.3 2.1 19 131 1.2 0.11 0.8 1

12 16 44 55.1 19-26.9 154-49.61 8.0* 2.6 16 2q1 1.6 0.31 2.8 

12 20 1 29.8 19-23.3 155-24.9 6.8 1.9 18 10 6.4 0.10 0.8 0

12 21 25 12.8 19-20.7 155-10.0 8.3 2.5 20 173 2.0 0.19 1.4 0

13 5 49 9.1 19-23.4 155-24.6 8.4 1. 7 11 76 6.3 0.11 0.9 1

13 11 53 42.5 19-16.8 155- 4.1 4.8 2.1 16 241 13.9 0.41 2.1 1

13 19 11 18. 1 19-26.6 155-25.1 6.1 1.8 13 124 6.1 0.30 1.2 3

13 13 43 41.2 19-24.4 155-16.6 11.4 11 89 1.2 0.12 0.9 1

13 23 44 12.7 19-17.9 155-22.1 18.4 2.5 8 299 14.5 1.86 11.1 1

14 8 51 23.9 19-23.3 155-37.2 11.8 2.1 15 116 12.5 0.07 0.5 0

14 11 15 9.0 19-25.8 156- 3.3 1.3 2.3 11 301 11.1 2.15 10.2 3

14 18 38 25.6 19-14.1 155-28.11 8.0* 9 302 14.1 1.94 12.5 

15 1 17 25.6 19-20.3 155- 8.7 8.3 1.5 16 261 3.6 0.38 2.2 0

w

0"\ 15 1 20 31.8 19-19.1 155- 8.9 9.8 1.3 14 264 4.3 0.34 2.0 0

15 1 51 14.9 19-13.5 155-23.4 28.5 14 189 12.4 0.21 1.0 2

15 3 14 31.6 19-15. 3 155-24.1 25.5 5 213 9.4 

15 3 56 39.8 19- 0.5 155-18.2? 8.0* 9 289 36.2 1.35 8.8 

15 5 33 54.2 19-18.5 155- 1.6 9.4 2.1 19 238 16.0 0.62 3.7 1

15 12 22 23.1 19-29.5 155-13.61 8.0* 6 342 10.4 1.33 9.6 

15 13 21 8.2 19-30.7 155-16.61 8.0* 2.0 8 329 10.0 1.24 8.1 

15 15 50 6.6 19-32.1 155-18.8? 8.0* 2.4 8 325 12.5 1.88 11.1 

15 16 40 47.6 19-29.3 155- 7.11 8.0* 2.1 5 349 19.2 6.13 61.1 

15 19 16 34.9 19-22.6 155-45.3 8.8 10 261 20.2 0.49 2.4 0

16 3 6 51.6 lq-21.1 155-42.1 9.3 2.4 18 118 13.4 0.13 1. 1 0

16 4 18 45.3 19-24.1 155-25.5 1.6 1.9 19 12 8.1 0.11 0.9 1

16 9 25 45.6 18-48.6 155-34.91 8.0* 3.1 16 ZQ3101.4 2.40 15.1 

16 19 59 34.2 20-28.4 156- 2.21 9.4 2.6 26 164159.3 0.10 6.5 22

16 22 49 28.1 19-20.1 155-10.5 8.2 2.0 18 243 3.2 0.22 1.3 0

11 6 59 53.3 19-23.6 155-17.61 3.2 2.0 15 61 1.5 0.06 0.4 0

11 7 21 51.2 19-23.5 155-11.2 1.9 6 140 0.1 0.04 0.1 0
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1910 HR MN SEC LAT N LONG W DEP.TH MAG NO GAP OMIN ERT ERH E

MAR 11 10 31 5. 1 19-24.3 155-21.2 11.8 1.9 17 82 10.2 0.05 0.5 0

11 11 23 35.9 }q-25.4 155-15.0 11.4 8 255 3.1 1.65 3.2 8

17 12 15 53.6 19-20.8 155-15.8 12.0 1.1 8 169 2.1 0.34 1.6 2

11 15 45 45.2 19-23.1 155-11.2 1.9 0.9 7 121 1.0 0.06 0.1 0

11 19 21 11.0 19-22.5 155-24.2 10.4 14 12q 4.5 0.10 0.9 0

17 19 50 44.0 19-21.5 155- 7.9 7.0 2.4 20 195 3.8 0.19 1.4 0

17 19 59 33.3 19-24.1 155-25. 1 10.9 15 14 1.8 0.06 0.6 0

17 21 4 2.8 19-23.2 155-17.1 3.0 0.6 13 59 0.1 0.04 0.3 0

17 21 1 32.5 19-23.0 155-11.6 3.0 1.5 15 66 1.5 0.05 0.4 0

11 21 23 42.4 lq-23.2 155-11.2 3.0 13 59 0.1 0.03 0.2 0

11 21 49 19.6 19-20.9 155-12.6 1.8 11 190 2.1 0.15 0.9 0

17 22 51 14.2 19-23.4 155-11.2 2.1 1 145 0.7 0.14 0.4 0

11 23 13 38. 7 19-23.4 155-17.5 2.9 1.0 12 61 1.2 0.04 0.3 0

w 18 0 11 55.1 19-23.4 155-11.1 3.0 0.8 8 144 0.5 0.05 0.3 0

"" 18 2 36 48.4 19-23.3 155-11.4 2.5 1.1 14 61 1.1 0.05 0.3 0

18 3 29 48.8 19-23.8 155-11.3 1.1 0.8 1 132 1.1 0.09 0.3 0

18 6 21 6.5 19-18.3 155-11.6 5.9 1.6 12 251 1.0 0.29 1.5 0

18 6 23 30.7 19-22.7 155- 3.4 1.2 4.1 18 182 11.1 0.15 1.3 0

18 6 31 26.6 19-20.6 1.9 5.0 2.5 18 216 14.4 0.30 1.8 1

18 6 41 33.2 19-15.8 154-55.91 0.1* 2.3 7 325 21.1 0.29 2.0 

18 6 53 0.4 19-23.6 155-11.3 2.4 0.9 6 141 0.9 0.31 0.1 1

18 6 55 35.0 19-21.9 155- 4.4 9.2 13 293 9.7 0.61 3.0 0

18 6 51 1t9.5 19-23.3 155-17.0 2.q 1.4 11 91 0.4 0.04 0.3 0

18 7 48 55.7 19-17.3 155-16.4 8.1 14 210 5.5 0.25 1.6 1

18 9 3 50.3 19-23.3 155-17.2 1.8 0.5 5 153 0.8 

18 11 5 35.5 19-23.6 155-17.1 7.4 2.3 13 102 0.6 0.13 0.9 0

18 12 34 27.8 19-23.7 155-17.4 1.4 0.8 8 102 1.1 0.17 0.5 1

18 12 53 4.6 19-23.5 155-11.0 1.8 1 131 0.4 0.11 0.3 0

18 13 47 23.4 19-23.4 155-11.4 2.8 1.3 11 18 1.0 0.04 0.4 0

18 15 12 22.9 19-23.4 155-17.3 2.8 1.0 10 14 0.9 0.08 0.5 1
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W OEP·TH MAG NO GAP DMIN ERT ERH E

MAR 18 16 43 2.8 19-22.6 155-17.9 4.0 1.3 10 131 2.4 0.16 0.1 1

18 18 38 59.5 19-41.5 155-51.31 1.0 2. 1 17 225 19.4 0.16 6.3 .5

18 19 21 51.5 1q-23.6 155-16.9 3.3 5 147 0.4 

18 19 21 31.9 19-24.4 155-24.0 12.0- 1.9 12 128 1.7 0.08 0.6 1

18 19 43 59.4 lq-23.4 155-17.5 3.9 1.9 11 62 1.3 0.06 0.5 0

18 19 52 3.6 19-23.3 155-11.2 2.1 1 96 0.8 0.01 0.2 0

18 21 37 59.3 19-23.0 155-38.91 10.5 1.9 12 130 14.2 0.22 1.1 2

19 0 31 46.9 19-23.5 155-17.1 2.5 11 106 0.6 0.03 0.2 0

19 1 11 59.6 19-56.8 155-34.11 13.6 2.5 19 173 16.7 0.12 1.1 1

19 1 51 7. 3 19-21.1 155-15.4 4.5 1.3 8 314 5.8 1.02 5.4 1

19 3 8 45.9 19-23.4 155-11.2 2.8 8 141 0.6 0.11 0.3 0

19 3 34 19.1 19-23.1 155-11.0 2.0 0.9 6 140 0.1 0.23 0.5 1

19 4 53 53.2 19-28.0 155-14.9 3.2* 1.4 6 317 6.8 9.85 35.5 

19 5 8 48.2 19-23.4 155-17.51 2.1 8 83 1.2 0.46 1.5 3

w

00 19 5 21 31.8 19-21.8 155- 3.0 7.1 2.0 12 221 12.3 0.26 1.7 0

19 6 11 30.1 19-23.5 155-11.1 2.2 0.1 1 141 0.6 0.06 0.2 0

19 8 46 20.0 19-20.5 155-16.8 30.4 3.0 20 149 1.3 0.14 1.0 1

19 10 8 51.4 19-15.4 155- 6.1 4.1 3.0 18 221 13.6 0.31 1.7 1

lq 11 8 35.0 19-23.6 155-17.81 3.1 1.5 11 12 1.8 0.07 0.5 0

19 18 31 51.2 19-23.4 155-11.1 2.4 1.0 12 91 0.5 0.04 0.3 0

20 0 10 51.3 lq-21.4 155- 8.9 8.4 1.7 15 252 2.0 0.21 1.3 0

20 4 46 52.5 19-20.2 155-25.6 7.4 1.6 12 154· 4.1 0.12 0.9 1

20 5 4q 39.6 19-23.6 155-11.3 2.9 1.3 12 100 0.9 0.03 0.3 0

20 6 19 49.4 19-23.5 155-17.1 2.9 1.0 9 142 0.6 0.02 0.2 0

20 1 41 58.3 19-23.8 155-11.2 2.1 0.9 8 122 1.0 0.10 0.2 0

20 8 31 ZQ.4 19-23.7 155-14.6 2.8 7 195 3.2 0.12 0.5 0

20 10 5 43.1 19-23.5 155-11.1 7.6 2.3 12 99 0.5 0.21 1.1 1

20 12 42 19.1 19-23.3 155-17.3 1.2 0.7 6 156 0.9 0.12 0.4 1

20 13 54 20.2 19-21.8 155-26.1 8.8 2.2 13 119 6.1 0.10 0.9 1

20 13 5'5 1.5 1Q-20.4 155-26.2 9.1 2.0 8 141 5.2 0.15 1.8 1
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC lAT N LONG W OEPTH MAG NO GAP CHIN ERT ERH E

MAR 20 16 3 28.9 19-23.1 155-16.8 3.1 0.8 6 149 0.6 0.04 0.4 0

20 16 55 8.4 1Q-1O.l 155-39.4 7.6 1 221 9.8 0.35 2.9 1

20 11 54 41.4 19-23.1 155-17.2 2.9 1.3 13 59 0.9 0.05 0.3 0

20 18 13 3q.2 19-23.4 155-17.1 2.7 0.3 9 93 0.5 0.08 0.2 0

20 22 52 36.2 19-16.1 155-52.97 1.3* 2.4 15 261 27.1 0.62 3.1 

20 23 11 51.8 19-24.0 155-23.6 1.8 2.0 14 109 6.9 0.10 0.8 0

20 2.3 19 27.3 19-19.0 155-12.7 7.6 11 234 5.5 0.31 1.9 0

20 23 21 21.4 19-23.6 155-11.4 0.9 -0.3 1 141 1. 1 0.11 0.3 1

21 0 11 5l.5 19-23.4 155-11.1 2.6 6 142 0.5 0.27 0.6 1

21 1 4 26.8 19-19.3 155-10.7 8.1 9 260 4.7 0.43 1.1 2

21 1 11 10.1 1q-23.8 155-14.8 4.2 6 254 3.2 0.12 0.4 0

21 1 33 53.5 19-23.0 155-14.7 3.0 1.3 10 102 2.3 0.13 1.0 0

21 1 4C1 4.0 19-17.5 155-16.0 8.5 1.6 11 228 5.3 0.21 1.2 0

21 1 51 1.9 19-23.3 155-11.3 1.7 0.1 1 152 0.9 0.10 0.3 0

w 21 2 21 54.8 19-23.8 155-11.3 2.1 1.3 10 81 1.2 0.05 0.3 0

\0

21 2 22 36.0 19-23.7 155-17.4 2.1 0.8 9 100 1.3 0.11 0.6 0

21 3 5·7 24.6 19-23.1 155-11.1 2.0 0.1 9 107 0.8 0.09 0.2 0

21 4 45 10.3 19-23.2 155-17.47 2.8 1.2 12 61 1. 1 0.06 0.4 0

21 5 42 41.8 19-19.9 155-24.5 10.6 1.4 9 221 2.2 0.11 1.2 1

21 5 43 40.1 19-19.0 155-24.8 11.2 8 287 3.5 0.32 2.1 0

21 1 2 26.3 20-14.8 154-59.21 4.6* 6 355101.1 6.10 22.3 

21 1 55 40.3 19-20.6 155-10.4 14.4 9 248 2.4 0.23 1.6 1

21 9 5 11.2 19-18.1 155-23.41 8.0* 6 336 15.2 2.08 54.5 

21 10 14 29.4 19-18.0 155- 6.6 6.4 2.1 14 215 9.2 0.25 1.5 0

21 12 36 3.9 19-23.0 155-11.61 3.2 1. 3 12 67 1.6 0.01 0.5 0

21 14 2 29.1 19-23.1 155-16.1 4.4 1.9 10 124 1.4 0.11 0.5 0

21 15 51 54.5 19-23.8 155-16.0 4.5 1.8 11 89 1.6 0.11 0.5 0

21 16 8 29.5 19-23.4 155-17.3 2.2 1.3 10 97 1.0 0.03 0.2 0

21 17 32 34.5 1q-24.1 155-16.2 4.7 9 199 1.6 0.50 1.6 2

21 18 58 38.9 19-23.3 155-17.1 3.0 1. 1 12 95 0.5 0.04 0.3 0
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1910 HR MN SEC LAT N LONG W DEP.TH MAG NO GAP DMIN ER"r ERH E

MAR 21 21 13 58.6 19-23.6 155-11.1 2.8 1.4 12 81 0.6 0.03 0.2 0

21 21 21 19.3 19-23.5 155-11.7 2.6 1.4 11 63 1.6 0.06 0.4 0

21 21 55 24.0 19- 2.9 155-1q.7 44.2* 2.8 21 262 32.0 0.24 1.9 

21 23 41 46.0 19-23.6 155-11.2 2. 1 6 136 0.9 0.12 0.3 0

22 0 8 35.3 19-23.4 155-17.3 2.6 10 96 0.8 0.03 0.2 0

22 0 31 20.0 19-23.8 155-14.8 2.9 8 193 3.1 0.04 0.2 0

22 0 38 25.0 19-19.5 155-11.2 10.3 7 239 1.2 0.65 1,.2 3

22 1 5 42.1 1<)-23.8 155-11.7 1.7 7 141 1.7 0.03 0.2 0

22 1 5 44.7 19-51.6 155-44.41 6.7 2.1 13 165 19.5 0.99 5.3 28

22 1 11 25.9 19-23.5 155-17.2 2.6 6 140 0.1 0.21 0.4 1

22 1 15 56.0 19-23.4 155-15.2 3.1 10 91 2.3 0.01 0.5 0

22 1 19 9.1 19-23.1 155-15.3 6.5 1.7 16 66 1.6 0.06 0.5 0

22 1 33 32.8 19-23.8 155-11.4 2.8 11 102 1.4 0.06 0.4 0

22 2 2 o. 3 19-23.3 155-11.2 3.6 8 113 0.7 0.11 0.1 0

-I::'

0 22 2 5 49.4 "19-23.8 155-11.5 5.8 2.4 16 59 1.5 0.08 0.6 0

22 3 34 25.5 19-21.6 155-13.5 11.8 9 293 3.1 1.62 7.9 6

22 4 2 21.5 19-23.1 155-14.3 5.4 6 213 2.9 0.23 0.1 1

22 4 48 4.1 19-21.9 155-20.5 29.4 2.6 21 117 3.7 0.19 1.1 1

22 4 S3 1.9 19-2"3.9 155-14.8 2.9 8 200 3.4 0.07 0.4 0

22 5 3 31.8 19- 6.7 155-29.4 8.9 9 335 27.1 0.66 7.1 6

22 5 11 21.6 19-23.2 155-11.3 3.2 12 61 0.9 0.05 0.3 0

22 5 53 5.2 19-23.1 155-11.4 4.1 2.2 13 106 1.2 0.14 0.1 1

22 5 54 6.9 lq-23.3 155-17.0 0.6 8 93 0.5 0.21 1. 1 3

22 7 45 28.0 19-20.0 155-12.6 9.0 2.4 15 194 3.8 0.14 1.2 0

22 8 17 13.5 19-22.4 155-11.5 0.1 6 126 2.3 0.32 0.5 5

22 14 15 15.0 19-16.6 155-26.2 6.7 2.5 14 194 8.4 0.16 1. 1 0

22 15 58 50.1 18-43.0 155-15.0 17.9* 3.0 16 320119.3 0.47 3.8 

22 17 19 18.8 19-22.8 155-15.4 6.0 2.1 14 11 1.2 0.08 0.6 0

22 17 33 44.2 19-23.9 155-16.4 0.0 11 17 1.1 0.08 0.4 1

22 18 3 43.3 lq-24.5 155-17.1 0.1 1.0 12 115 0.7 0.11 0.5 4
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT E

MAR 22 19 14 20.2 19-23.2 155-17.4 3.9 2.1 15 62 1 • 1 0.08 0.4 0

22 20 3 59.0 19-23.3 155-14.9 3.7 1.3 9 117 2.4 0.16 0.6 1

22 20 24 55.5 19-23.6 155-14.6 2.8 1.3 9 191 3.2 0.08 0.'4 1

22 21 26 10.5 19-23.3 155-11.6 4.8 2.4 16 64 1.4 0.07 0.4 0

22 23 40 20.7 19-23.7 155-11.4 0.4 0.8 7 136 1.1 0.09 0.3 2

23 1 38 44.9 19-23.8 155-17.5 0.7 0.1 9 90 1.4 0.08 0.2 1

23 5 20 36.3 19-23.9 155-17.0 2.1 1.2 9 115 0.9 0.10 0.3 0

23 6 19 54.2 19-23.5 155-15.1 3.2 ' 1.6 q 115 2.4 0.10 0.6 1

23 7 21 25.3 19-14.4 155-32.01 6.5* 5 225 9.0 1.43 11.6 

23 15 45 22.1 19-24.0 155-17.3 1.6 1.0 8 125 1.4 0.09 0.7 0

23 22 0 41.3 19-21.1 155-25.3 10.7 2.3 16 111 4.5 0.08 0.6 0

23 22 6 37.1 19-21.4 15'5-50.5 6.7 2.3 16 176 10.9 0.11 1. 1 0

23 22 54 4.2 19-21.1 155-25.9 9.1 2.9 18 115 5.3 0.09 0.7 0

24 1 46 18.2 19-19.9 155-15.9 31.6 18 185 2.6 0.23 1.3 1

+:--- 24 8 4 51.1 19-20.4 155- 9.1 8.7 2.0 16 198 3.0 0.11 1.2 0

24 15 16 44.9 19-23.4 155-11.4 4.7 2.3 16 61 1.0 0.11 0.6, 1

24 15 17 45.3 lq-23.6 155-17.5 5.8 2.7 16 51 1.3 0.09 0.7 0

24 20 6 54.9 19-22.1 155-24.3 5.5 2.2 15 85 4.0 0.08 0.7 0

24 20 11 54.2 19-23.0 15,}-15.4 6.1 2.4 16 66 1.3 0.01 0.5 0

24 22 19 8.9 19-23.4 155-17.2 2.3 1.5 13 q3 0.7 0.04 0.3 0

25 2 38 29.5 19-23.4 155-16.9 b.O 2.5 17 75 O.l 0.08 0.7 0

25 10 37 56.1 19-10.8 1'55-35.0 10.7 2.4 15 252 8.1i 0.38 2.7 D

25 15 33 46.8 19-23.8 155-11.4 2.1 13 85 1.4 0.0:3 0.2 0

25 15 '34 11.5 19-23.7 155-11.4 2.5 1.6 13 85 1.3 a.03 0.2 0

'26 3 41 34.9 19-46.0 155-23.71 22.6 14 271 6.3 0.43 J.1 4

26 3 48 21.1 l<}-25.<J 155-34.4 2.7* 7 145 20.7 0.13 1.0 

26 9 54 39.9 19-17.7 155-13.6 10.2 2.6 19 g. 1 0.17 1 • I 

26 11 10 5.7 19-23.3 155-24.8 l.J.l 13 78 6.3 0.05 0.5 1

26 11 27 41.8 19-15.8 1'55-13.3 8.2 10 241 10.8 0.40 2.2 1

26 11 31 51.7 19-18.4 155-13.6 11.4 2.7 14 200 6.8 O.ll o.g 0
SUMMARY OF SEISMIC (CONTINUEO)

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP OMIN ERr ERH ER

MAR 26 13 40 22.3 19-20.3 154-58.61 q.7 9 252 16.q 0.43 4.6 3

26 18 28 6.6 19-22.2 155-24.91 11.7 13 167 4.7 0.14 1.2 0

26 20 11 9.2 19-23.1) 155-17.1 2.7 1 138 0.5 0.07 0.'2 0

26 20 18 10.7 19-22.q 155-22.8 0.0 10 112 4.q 0.22 1.0 3

26 21 17 46.0 19-22.5 155-19.8 0.2". 10 99 2.2 0.10 0.') 

27 1 34 44.6 19-24.6 155-28.37 11.0 2.1 11 89 11.9 0.13 0.1 0

21 3 12 23.8 19-17.5 155-13.9 1.9 13 246 7.8 0.32 1.6 0

27 6 6 51.0 19-22.0 155-24.0 9.3 ' 1.9 11 lq3 3.4 0.17 1. 1 0

21 6 56 44.5 19-20.7 155-12.1 1.6 16 201 2.7 0.20 1.2 ()

27 q 57 6.7 19-21.8 155-28.1 11.5 1.4 11 134 9.9 O.Oq 1.4 3

21 13 27 16.2 20-15.3 155-31.6 8.0* 3.1 19 1q5132.5 0.28 2.9 

27 18 22 16.4 19-21.q 155-24.3 8.3 8 214 3.6 0.78 1.9 4

27 20 38 40.5 19-18.3 155-13.1 9.5 2.2 18 225 7.1 0.23 1.4 0

27 21 14 3q.4 19-21.1 155-25.0 10.9 2.0 16 125 3.4 0.11 1.0 1

21 23 15 28.3 19-20.3 155-L9.1 5.7 1.5 12 113 4.1 0.26 0.7 2

N

28 1 56 31.8 19-23.0 155-28.1 9.9 2.3 20 81 q.9 0.01 0.6 0

28 6 52 26.4 19-19.6 155-19.1 9.2 1.6 14 202 4.1 0.09 0.5 0

28 13 2 16.1 19-19.2 155-15.8 8.0 1.7 1'7 212 3.2 0.14 0.9 0

28 15 22 38.8 19-24.1 155-24.3 11.0 13 121 8.2 0.06 0.5 0.

28 21 22 51.9 19- 8.1 155-32.1 6.6 9 169 12."3 0.11 1.1 u

28 21 23 59.2 19-22.1 155- 7.3 9.4 1 • 5 19 283 4.8 0.33 1.9 0

29 9 46 27.6 19-20.0 155- 9.2 8.9 2.0 19 200 3.6 0.18 1.3 0

29 15 4 5.6 19-24.3 155-11.4 13.5 17 54 o. '7 0.05 0.6 0.

29 16 4 49.1 19-20.1 155-17.8 1.8 1.7 11 165 0.7 0.08 0.6 0.

29 11 18 15.4 lq-18.5 155-15.9 8.3 l.q 17 200 3.9 0.14 0.9 0.

29 22 2 51.9 19-20.2 155-13.4 8.3 1.5 18 193 3.5 O.ll o.q 0.

29 22 59 14.1 18-58.2 155-30.3? 1. 1 6 314 33.1 3.96 ?R.5 42

30 2 35 26.1 19-31.7 155-15.4 21.8 4.3 23 17 10.9 0.12 0.7 1.

30 3 12 12.2 19-19.5 155-25.8 6.9 2.0 12 174 4.6 0.16 1 • 1 1.

31 10 11 52.6 19-23.1 155-15.3 3.3 1.8 10 163 7.6 0.06 0.4 1.
SUMMARY UF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

MAR 31 21 0 11.3 19-18.2 155- 8.3 7.3 2.4 18 216 7.4 0.30 1.1 0

31 22 30 2.3 lQ-19.0 1'55- 3.2 6.8 3.8 17 220 13.0 0.33 2.0 1 

31 22 35 58.9 lq-22.3 155- 7.1 6.7 2.0 16 250 5.1 0.36 2.'1 1

31 23 0 15.8 19-21.8 155- 8.8 8.0 1.6 14 264 2.0 0.20 1.2 0

31 23 19 34.5 19-15.8 155- 2.3 3.6 2.2 17 261 1'7.5 0.71 3.4 1

31 23 53 13.5 19-20.3 155-13.1 9.2 2.3 18 lq4 3.3 0.13 1.0 0
Table 3.--Felt earthquakes

Date Time Magnitude Felt report

H M S

Jan 2 12 20 32.6 3.3 Kealakekua

3 15 06 27.8 2.9 Hi10

27 09 09 09.1 3.8 Hi10, ~1t. View

Feb 4 06 08 25.2 3.1 Kapapala Ranch

5 00 20 53.3 3.5 Kapapala Ranch

17 20 42 35.2 3.4 Kapapala Ranch

Mar 2 14 30 02.9 4.0 Pahoa, Hila,

Laupahoehoe,

Kapapa1a Ranch

18 06 23 30.7 4.1 Paauilo, Hila

19 08 46 20.0 3.0 Paauilo

30 02 35 26.7 4.3 Hilo, Paauilo

Kapapala Ranch,

Kamuela, Mt. View,

Volcano

31 22 30 02.3 3.8 Kapapala Ranch

44
+

19 34 .0 19 34- .0 .......... .......,a.

Ul U1

Ul + U1

W +

•• (J)

a

0

a

t::a

+ +

+ +

+

A+ +

Symbol

..........

(J1

•

U1 X +

W +

CY

.p 0 5 Km.

19 1·0 .0 ---

C)

+

+ +

+ ..

+

+

+.

. +

+

1910.0

.'+

I •

'.

+.. .;- . + . '.+

Magnitude

Interval

4.0 < M 5.0

3.0 < M 4.0

2.0 < M 3.0

M 2.0

+

L ,··

) . . , ·'AA·· if- ,'-\:.. :-::.. . +

"="·1 !~':':-i:' ,I': •

.~::.'::'.:...:.: . "- ••••• ~J:"1'·'•••

X'. XtJ.· ". •(J <\) + \)

+ · A + + + + u + . ... + + .. +.

X '.•••+- .'.

+. + .+" '.• :.:':' •~.+' t · '+.-t.' · ; . +.~'; .: '. ...:' ,.... . ..' +'..!:::' .' ..'. '.

+.

....

+

+

+ '. :t+ +

• '•••' • +-'

. • .+ .+ '.

....

+

. +

++

+

.: +.

+ +..... + .•+ · "t:. +

+ · of-

+

+

+

+ .

.~

+

.+'

Figure 2.--Plot of epicenters in the Kilauea region. Triangles are

seismometer locations. Kilauea Caldera and the major pit craters

on the east rift are shown in outline. The Pacific Ocean lies in

the lower right portion of the illustration.

45
106 l0r-__r--__~--___r--.....,...---~--~--__r_---_--._Ol

I

Frequency (Hz)

10 100

Figure 3.--Response curve for System II, EV~l7, Teledyne

seismic preamplifier.

46
Table 4.--U.S. Geological Survey seismograph stations in Hawaii

[on island of Hawaii unless otherwise stated]

Station

Mauna LoaMauna Loa X

Ahua

Desert

North Pit

West Pit·!.!

Kipuka Nene

Outlet

Cone Peak

Makaopuhi

East Koae

Aloil /

Glenwood1/

Puu Hu1uhu1u

Kahuku

Hale Pohaku

Pohoai/

Puu Honuau1a

I::' Waiohinu

Hi10

Kamuela

Kealakekua

Bay

Maui (Hakeakala)

Oahu (EWA Beach)

Symbol

UWE

MLO

i1LX

AHU

DES

NPT

WPT

KPN

OTL

CPK

MPR

EKO

ALO

GLN

PHH

KHU

HPU

PAX

PHO

WAO

HIL

KAM

KLK

NBY

HAL

KIP

Location

19° 25.4'N, 155 0 17.6'W

19 0 29.8'N, 155 0 23.3'W

19° 27.6'N, 155 0 20.7'W19 0 22.4'N, 155° 15.9'W

19° 20.2'N, 155 0 23.3'W

19 0 24.9'N 155° 17.0'W

19 0 24.7'N, 1550 17.5'W

19 0 155 0 17.4'W19 0 23.4'N, 155 0 16.8'W19 0 23.7'N, 155 0 19.7'W19 0 22.1'N, 155 0 9.8'W19 0 21.8'N, 155 0 15.3'W

190 22.0'N, 1550 12.8'W

19 0 29.0'N, 155 0 9.9'W19 0 22.5'N, 155 0 12.5'W

190 14.9'N, 1550 37.1'W190 46.6'N, 155 0 27.3'W19 0 29.1'N, 1540 55.8'W19 0 28.9'N, 154 0 53.4"W

19° 3.6'N, 155 0 36.6'W

19 0 43.2'N, 1550 5.3'W

20 0 2.1'N, 155 0 42.2'W

19 0 31.2'N 1550 55.3'W

19° 29.7'N, 155 0 34.8'W

20 0 46.0'N, 156 0 15.0'W

21° 19.0'N, 1580 1.0'W

Instrumentation

a) 15-90 Press system

b) HVO-l vertical system

c) Sprengnether short period

vertical and horizontal (E-W)

EV-17/system

EV-17/system I

HVO-2/system I

EV-17/system

EV-17/system

HS-10/system

EV-17 system

EV-17/system

EV-17/system I

EV-17 system II

EV-17/system

EV-17/system

EV-17/system IIEV-17/system II

EV-17/system II

EV-17/system II

EV-17/system II

EV-17/system II

EV-17/system II

a) HVO-1 vertical system

b) Wood-Anderson NS and EW

EV-17/2.0 cps ga1v

EV-17/3.5 cps galv (vertical)

EV-17H/3.5 cps galv (NS and EW)

HS-IO/Geotech PTA

HVO-l vertical system

Wood-Anderson NS and EW

HVO-l vertical system

Recording

Local drum recorded

HVO Develocorder

Local drum recorder

T

HVO m

(RM-U

RM-U

TS-1

RM-U

RM-U

TS-IO

Loca

1/

- HS-IO replaced by Benioff 4681A (vertical, 1.0 second period).

l/Aloi discontinued on April 15, 1970.

1/G1enwood temporarily discontinued April 30, 1970.

discontinued April 15, 1970. Replaced by Puu Honuala (PHO).
Table 5. --Seismi.c instrumentati.on

1. Seismometers

EV-l7

EV-17 H

HS-IO

HVQ-2

Electrotech EV-17 1.0 sec. period moving magnet

vertical component seismometer

Same as above, but horizontal component

Hall-Sears 0.5 sec. period moving coil seismometer

0.8 sec. period moving coil seismometer

2. Seismographs

HVQ-l Vertical-component electromagnetic seismograph with

a peak magnification of about 20,000 at 0.25 sec.

period.

15-90 Press-Ewing System: 3-component long period PressEwing seismograph system with pendulum and

galvanometer periods of 15 and 90 seconds,

respectively.

EV-17/3.5 cps galv, EV-17 H/3.5 cps galv, etc.: Short period

electromagnetic seismographs composed of the

seismometers and galvanometers indicated. Response

similar to HVO-l. Poorly calibrated.

3. Amplifier and signal transmission systems

System I: HVO-built solid state seismic preamplifier

(voltage gain, 200x) , direct signal transmission over

"hard" wire to HVO, HVO-built solid state amplifier

and galvanometer driver.

SY'stem II: Develco or Teledyne seismic preamplifier--

voltage controlled oscillator, signal transmission on

audio FM carrier over "hard" wire or FM radio link to

HVO, discriminator.

Geotech PTA: Short period Geotech photo-tube amplifier.

4. Timing systems

IDi-USGS: Crystal-controlled chronometer employing

solid-state binary dividers to produce minute and

48
hour marks. Typical drift rates are a few milliseconds

per day.

TS-lOO: Sprengnether crystal controlled chronometer.

Output and performance characteristics are similar to

those of RM-USGS.

5. Telemetered system response

The peak magnification of the standard telemetered systems

(System II, with the film strip magnified 20 times for

viewing) is about 2 x 105 at a period of 0.1 second. For

periods between 0.1 and about 1.0 second, the response falls

off 6 db/octave. (f~g. 3)

49
TILTING OF THE GROUND AROUND KILAUEA CALDERA

Tilting of the ground around the summit of Kilauea is monitored

daily by a short-base water-tube tiltmeter in Uwekahuna Vault, and

at irregular intervals it is measured on a regional scale by means

of a network of field tilt-bases and a portable water-tube tiltmeter.

The attitude of the ground surface at each tilt-base is reported in

terms of north-south and east-west tilt coordinates. Both coordinates at each station were arbitrarily set equal to 500 when

measurements at that station were begun. Increasing tIlt coordinates

correspond to northward and eastward tilting of the earth's surface;

that is, to a relative subsidence toward the north and east. A oneunit change in coordinate corresponds to a tilting of 1 microradian

(1 mm per km) in the direction indicated.

Location of and essential data on each tiltmeter station are

listed in table 8, which is published only in the first quarter issue

each year.

Table 6.--Ti1t Coordinates at Uwekahuna, January,

February, and March, 1970

II

Date N-S E-W 1\ Date N-S E-W

(1970) (1970)

Jan. 4 544 402 Mar. 1 552 384

11 546 395 8 552 385

18 548 392 15 553 386

25 547 391 22 557 381

Feb. 1 548 391 29 559 379

8 550 383

15 551 386

22 551 386

50
Table 7.--Tilt coordinates and changes at bases around Kilauea caldera. (See fig. 4)

-6 Rate (10 rad/mo)

Tilt base Date Ii.1t Coordinates and direction of 

(1970) N-5 E-W tilting since 

last reading 

Uwekahuna (U on fig. 4) 27 Feb 606.0 357.2 7.55 N46.7°W 

Tree Molds (TM) 9 Feb 485.6 495.8 3.79 N21.6°W 

Sand 5pit (55) Not read this epoch

Keamoku (Kea). 11 Feb 530.1 375.1 3.81 N79.7°W 

U1 Ahua Kamokukolau (Kam). Not read this epoch

\-l

Kipuka Nene (KN) 13 Feb 295.5 1/507 . 5 0.95 S17.6°W 

Hilina Pali (HP) Not read this epoch

Kapapa1a Ranch (Kap) . 11 Feb 487.7 519.3 1.72 S63.8°E 

Mehana (M) 9 Feb 579.2 587.0 2.36 N45.4°E 

11 The hundreds digit of the E-W tilt coordinate of Kipuka Nene is 5 instead of 3 as report

last 10 summaries.
/

Uwekahuno

Kia

cr

o

Q

~2000

• HP

1----1

TILTING RATE 2.5 X 10-6 RADIANS/MONTH

5 K M

Figure 4.--Tilting of the ground around Kilauea Caldera between Oct. 27, 1969,

and Feb. 9, 1970. The vector depicting tilting at a given tilt base

points in the direction of maximum relative subsidence, and its length is

proportional to the rate of tilting during the measurement interval.

Closed circles represent field tilt bases; open circles, short-base watertube tiltmeters. See table 7 for explanation of abbreviations.

52
Table 8.--U.S. Geological Survey water-tube ti1tmeter

stations in Hawaii

Location Frequency Base

Station Symbol of length Description

Lat. N. Long. w. reading M

Tree Molds TM 19° 26.3' 155° 17.3' Quarterly 50.79 NS. and EW.

Sand Spit 55 19° 24.1' 155° 16.8' ---do--- 25.40 Equilateral

triangle.

Keamoku Kea 19° 25.1' 155° 19.0' ---do--- 47.55 Do.

Ahua

Kamokukolau Kam 19° 22.7' 155° 16.6' ---do--- 50.79 Do.

Kipuka Nene KN 19° 19.4' 155° 16.7' ---do--- 50.79 Do.

Hi1ina Pa1i HP 19° 18.2' 155° 18.6' ---do--- 47.73 Do.

Kapapa1a

Ranch Kap 19° 20.5' 155° 23.8' ---do--- 50.79 Do.

Mehana M 19° 26.2' 155° 14.3' ---do--- 25.00 Do.

Uwekahuna U 19° 25.5' 155 0

17.4' ---do--- 50.79 Do.

Uwekahuna

Vault 19° 25.4' 155 0

17.6' Daily 3.48 NS. and EW.

53
References

Eaton, J. P., 1962, Crustal structure and volcanism in Hawaii, in

The crust of the Pacific Basin: Am. Geophys. Union Geophys.

Mon. 6, p. 13-39.

1969, HYPOLAYR, a computer program for determining

hypocenters of local earthquakes in an earth consisting of

uniform flay layers over a half space: U.S. Geol. Survey

open-file report.

Hamilton, R. M., Smith, B. E., Hall, J. C., and Healy, J. H., 1969,

Summary of seismic activity in the Pahute Mesa area, Nevada

Test Site, ·December 1968 - June 30, 1969: u.S. Atomic Energy

Comm. (USGS-474-58): Springfield, Va.·, Clearinghouse for

Federal Sci. and Tech. Inf., 63 p.

. GPO 982·410

54
,

UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

SUMMARY 58

April, May, and June 1970

By Elliot T. Endo~/t Robert Y. Koyanagi

and Arnold T. Okamura

OBSERVATORY STAFF

Geology

w. A. Duffield

H. A. Powers (Scientist-in-Charge)

D. A. Swanson

Geophysics

Geochemistry

R. T. Okamura

Support

D. B. Jackson

George Kojima

R. Y. Koyanagi

A. T. Okamura

c. D. Arakaki

J. C. Forbes

w. H. Francis

J. B. Judd

M. S. Onouye (Mrs.)

M. K. Sako

Akira Yamamoto

~/ Office of Earthquake Research and Crustal Studies, Menlo Park, Calif.
,

CONTENTS

Introduction. • . • . . . .

Summary of Principal Events .

Seismic Summary . • .

Tilting of the Ground Around Kilauea Caldera ..

References. • • . . .

Illustrations

Figure 1. Map of the Island of Hawaii showing seismometer

locations mentioned in text.

2. Epicenter map.

3. Response curve for System II, EV-17. Teledyne

seismic preamplifier • . . . • . . • • • . . • .

4. Tilting of the ground around Kilauea Caldera ••

Tables

Table 1. Number of earthquakes and minutes of tremor.

2. Summary of seismic events.

3. List of felt earthquakes • .

Page

1

4

6

72

76

2

68

69

74

7

13

67

4. u. S. Geological Survey seismograph stations

in Hawaii. . . . • . . . 70

5. Seismic instrumentation.

6. Tilt coordinates at Uwekahuna •.

71

72

7.

8.

Tilt coordinates and changes at bases around

Kilauea Caldera. .... . . . . .

U. S. Geological Survey water-tube tiltmeter

stations in Hawaii . . . • . • . . • . • • .

73

75
,

INTRODUCTION

During the last few years the Hawaiian Volcano Observatory's

seismic network has undergone important changes. The telemetered

network around the summit of Kilauea has been reinforced and extended,

and more stations (mostly telemetered by radio) have been added to the

broader Island of Hawaii network (fig. 1). All the telemetered stations

are recorded side by side, along with the Uwekahuna chronometer and the

WWVH radio trace, on a single 16 rom film strip on a Develocorder at the

Observatory. Outstation timing has also been improved substantially by

the use of crystal chronometers instead of the old mechanical ones. As

a result of these improvements, the volume of usable recorded seismic data

has increased tremendously, both in the number of stations available for

each earthquake and in the number of earthquakes that are sufficiently

well recorded to be located.

Detailed studies of microearthquakes in California and Nevada by

the Geological Survey's National Center for Earthquake Research (NCER)

have generated similar voluminous sets of seismic data. Efficient

computer-oriented procedures for data reduction and computer programs

for data analysis have been developed and used extensively at NCER.

The HVO seismic data are now being analyzed by a joint HVO-NCER teamt

and the methods and computer programs used are virtually identical with

those employed with other networks at NCER.

Seismogram readings are punched on computer cards to provide an

input deck for use in the location program HYPOLAYR (Eaton. 1969), which

generates an output deck summarizing the solution of each event. The

output deck is a convenient source of material for further analyses of

the earthquakes, and the input deck is saved for possible reanalysis

when better velocity-depth models of the crust are worked out. The

velocity-depth model currently used in the determination of hypocenters

(as tabulated below) is based on very limited data and represents a

broad average of crustal structure along the Hawaiian Ridge. It is

anticipated that further refinements in the model will not lead to large

changes in hypocenters calculated for events within the network, but

hypocenter solutions for some "poorly controlled" events outside the

network may be changed substantially.

Velocity model used for locating earthquakes in Hawaii

(Eaton, 1962)

Depth to top of layer

(km)

0.00

3.10

11.20

14.80

Layer velocity

(km/sec)

3.90

5.00

6.80

8.25
--_.. ------------------+--- II-

..

Figure l.--Map of the Island of Hawaii showing seismograph stations

operated by the U. S. Geological Survey, principal settlements,

and selected geologic features. Epicenters of local earthquakes

are given in table 2 in terms of geographic coordinates, which

are indicated at the edges of the map.

2
To permit more adequate reporting of results on individual earthquakes and to bring the HVO earthquake reports into conformity with

those produced at NCER t some revisions in the format of the HVO summary

are required. Beginning with the first quarter 1970 the following

changes were introduced:

a) The list of local earthquakes includes all events for which

satisfactory hypocenters can be determined. This list

includes statistics on the hypocenter determination as well

as a summary hypocenter quality rating.

b) A map of epicenters on and near Kilauea Volcano during the

quarter is included.

c) The station list is augmented to describe the timing system,

the type of preampli.fier (for telemetered stations), and the

mode of recording.

d) The velocity-depth model of the crust used in the hypocenter

determinations is described.

3
SUMMARY OF PRINCIPAL EVENTS

Eruptive and intrusive activity

The long-lived upper east rift eruption that began in May of 1969

continued through this period. The shield that grew around the central

vent of this eruption was informally named Mauna Ulu ("Growing Mountain"

in Hawaiian) early in 1970; this name was soon adopted formally.

The first two years of the Mauna Ulu eruption were described by

Swanson and others (1971). The period covered by the present summary

was principally a time of rapid growth of the Mauna Ulu shield. Growth

was sustained by repeated bri.ef periods of overflow with or without accompanying fountains up to 20 or 30 ro, adding scores of thin layers of

pahoehoe around the central vent. Ground deformation over the summit

reservoir was virtually negligible during this type of activity, suggesting a state of dynamic equilibrium. Two distinct events, however,

punctuated this perio'd of remarkable shield building; one began in early

April and the other in mid-May.

At 0830 April 9 a new radial fissure was discovered on the southwest

flank of Mauna Ulu. In a period of several hours, the fissure grew about

1.5 km to the southwest, crossing the floor of Alai Crater en route. When

the fissure was discovered t lava was gushing from where it cut the floor

and east wall of Aloi, and small flows that had quietly oozed from the

fissure immediately southwest of the crater had already puddled and were

cooling. By 1000 the crater was filled and overflowing to the south.

Although no one saw the onset of activity, examination of seismic and

tilt records suggests initial fissure formation at about 2200 April 8, followed by the outbreak of lava at about 0600 April 9. The rate of summit

deflation and the frequency of earthquake activity near Aloi increased

slightly between 2100 and 2200, April 8. The frequency of local Aloi

quakes increased to l60/hr between 0400 and 0500, April 9, and there was

some local tremor. The rate of summit deflation and the amplitude of

tremor both increased sharply at about 0600.

The new fissure erupted sporadically until about April 21, feeding

new flows that extended as much as 5.5 km to the south, and creating a

levee-contained lava lake in Alai. This lake was perched above the preApril level of the crater rim at the height of activitYt but subsided just

below the rim when activity ceased. The central Mauna Ulu vent appeared

to behave independently. Summit overflows added to the height of the shield

several times immediately preceding and during the Alai filling.

On May 15 and 16 seismicity increased greatly from the area of Devil's

Throat on the upper east rift to the summit caldera (see following section)

and two episodes of minor summit collapse took place. Collapse amounted to

4 and 7 microradians, respectively, at Uwekahuna and was recovered entirely

by May 27. Small open cracks formed across the Chain of Craters Road near

Lua Manu. Analysis of subsequent tilt, level, and geodirneter surveys suggested that these events resulted from the shallow intrusion of magma into

the southeast caldera-upper east rift area.

4

r
In general, behavior of the active lava in the central vent at Mauna

Ulu appeared to be unaffected by the May 15-16 events. May 21 marked the

beginning of a new series of overflows there that lasted until late June.

By the end of June all vestiges of Aloi Crater were buried and the top of

the Mauna Ulu shield stood about 100 m above surrounding terrain.

Seismic activity around the summit of Kilauea

The swarm of shallow earthquakes that began on the morning of May 15

was centered in the Kokoolau Crater-Devil's Throat area of the upper east

rift. The activity started about 0435, at the rate of 1 to 3 quakes per

minute. The frequency rapidly increased, and for several hours during the

peak of activity the records were so obscured that earthquake arrival times

were impossible to read. Several of the quakes were felt locally.

By May 16, the initial seismicity near Kokoolau and Devil's Throat

had diminished, but high activity spread northwest toward the southeastern

rim of Kilauea Caldera. At about 0100, May 16, many quakes were centered

near the southern part of the caldera, and at 0200-0400 seismicity was

climaxed by a flurry of small quakes near Halemaumau. Shallow tremor

accompanied the May 15-16 events and together with minor summit deflation

suggest movement of magma. This earthquake swarm was studied in Borne

detail by Endo (1971).

Lower east rift earthquakes

Following a month of quiescence, lower east rift quakes picked up in

mid-April. Activity peaked on April 26, when nearly a thousand small shocks

recorded on the local Puna station (PHO). Activity leveled after a few days,

and shocks continued to occur in moderate numbers. The continued activity

prompted the installation of two temporary stations near the permanent

station, Puu Honuaula, making a small tripartite array with stations located

about 1 to 1-1/2 km apart. Signals were wired from the seismometer sites

to the base of Puu Honuaula, and transmitted over FM radio to the Observatory.

Recording was made on Develocorder 16 rom film. The data showed that activity

was centered near the 1955 vents (see HVO Summary 57).

5
SEISMIC SlJMMARY

Events recorded by the H. S. Geological Survey seismograph network in

Hawaii fall into two categories:

1) Local earthquakes and tremor originating in the region of the

Hawaiian IRlands (usually withi.n IOn km of at least one seismograph),

2) Distant earthquakes originating more than 3,000 km from Hawaii.

As an index of seismic activity at ~lawai.ian volcanoes, daily counts of earthquakes and minutes of tremor recorded by seismographs in Hawaii are listed

in table 1. The earthquakes are separated in groups on the basis of region

of ori~in as determined by the analysis of records obtained daily at the

observatory (tJl~t MLO, MLX, ARII, DES, NPT, WPT, MPR, OTL).

Computer locations of well-recorded events are listed in table 2.

The location of each seismograph station is listed 1.n table 4, along with

a description of the equipment at each station.

6
..

Table l.--Number of earthquakes and minutes of tremor recorded on seismographs arou

Kilauea Caldera

Tremor is separated into three categories: deep. intermediate, and shallow on the basis 

amplitude on seismographs in the summit region. Unless otherwise stated, tremor is pre

associated with movement of magma within the central complex of Kilauea Volcano.

Earthquake categories are: Kilauea summit: 30 km. earthquakes from a source about 30 km 

Kilauea summit region; long period. earthquakes characterized by low-frequency waves th

about 5 km or deeper beneath Kilauea summit; and shallow earthquakes in the Kilauea Ca

Shallow earthquakes along the SW rift zone of Kilauea and the adjacent portions of the 

system. Earthquakes from the upper east rift zone and the adjacent fault systems of K

flank. Shallow earthquakes along the northeast-trending Koae fault system south of Kil

Earthquakes from other regions: west Hawaii, Mauna Kea, etc.

Tremor Number of Earthquakes

Date (m - minutes)

(1970) Kilauea Summit SW Rift upperY Lowe..;!:-'

Inter- Long and East East

Deep mediate Shallow 30 KM Period Shallow Kaoiki Rift Rift Othe

April 1 QJ o ,&oJ 1 597+ 14 64 1

2 ...,"1""4 1 .620+ 18 16 ? CI}

3 cv 408+ 8 40 ? .u cu

4

....

tU >

.., 4 282 6 33 ?

5 1 228 24 41 ? "0 Q.

6 o :1 s .... 1355 11 83 ? 

QJ .u

e en 

7 0 cc 502 13 109 2 J.f QJ

8 QJ 1 196 13 75 2 t:

9 t)() (1) 66 11 26 co c..

10 g. 2 48 6 11 .u OJ

11 t'd > 5 103 15 17 =' OJ QJ 12 .ur-f,.c (J .u 102 36 16+ 1

13 ::s ) r-f 0 c:: 2 117 33 12+

14 4 129 28 10
Table 1.--Number of earthquakes and minutes of tremor recorded on seismographs around Kilauea Caldera (cont'd)

Tremor Number of Earthquakes

Date (m

= minutes) Kilauea Summit Upper!.! 2/ (1970) SW Rift LowerInter- Long and East East

Deep mediate Shal1or.v 30 KM Period Shallow Kaoiki Rift Rift Others 

April 15 Q)

2 115 28

9 1

16

> 126 15 . 12

17 .u 120

7

7 c.

18 ,..=' 116 15

8

19 Q)

5

7 103 17

8 36

20 .... 81

9

7

4

21

2

3 121

8 18

9

£:

22 (I)

4 177 17 19

8

23 .-f 3 216 14 14 80 Q)

24 33m

> 119 10

9 158 Q)

25 t"""'f

2 75 14 57 409

26 1 1 75 11

6 956 0

27 ..... 3 3+ 114 13 17 754

28 0 1 102 17 13 800 ~+J

29 ......

2 126 13 10 297

Q)~

30

.u ,.. 129 23

6 386 as

... .&oJ

Q) fI)

May 1 "'0 as 93 8 5 303

o Q)

2

e

,.. 38 78 13

5 625

3 fa Q)

3 254 17 13 446

o Q.

4 ,.. c. 222 15

6 186 ='

5 COG)

2 215 11 18 185

6 c:..c: 370 19 27 252 -,..t ...

7 .&oJ 277 12 45 140 as c:

8 =' 0 2 179 12 33 75 .u

9

cJ Q)

1 78 16 27 63 =' .&oJ

10 ~~

2 72 18 38 30 f/)

•

'.
11 55

9 19 42

12 ,... OJ 1 66 10

9 29

13 g. 5 57 12 30 73

14 ::s 2 65

8 220+ 1

15 QJ ..c: 21 698? 81 815+ ?16 .&oJ

2 221 14 210+ ?

17 c:

0 1 241

8 125 ?

18 QJ 2 175

9 70 ?

19 .&oJ 51 87 11 73 ?

20 U) 4? 104 5 68 ?

21 OJ

> 51 143 13 33 ?

22 .... 4J 31

3 87 11 37 ?

23 g. ::s 101 37 73 16 81 ?

24 ,.. OJ

2 125 78

8 65 ?

25 ,... 1 193 88 12 37 ?

26 tUQ)

2 233 70 16 32 ?

27 35m d 360 47 5 31 ?

28 (I) 309 63 7 28 ?

29 OJ

> 185 49

8 26 ?

30 25m QJ

M

2 110 43

8 15 ?

31 :t 3 130 95

2 48 ? 0

.-4

June 1 0 2 2 70 8 7 ?

2 .&oJ

1 57

8 14 1

3 QI

3 2 112 5 11 ?

4 QS

3 675 22 56 ? ,.. 5 QI3 323 11 40 ?

6 i 7 12 117 25

7 ?

7 s 23 113 22 20 20

8 SSm 0 4 33 120

5 14 ?

9 103m 1 45+ 68 9 24 20

10 bO

4 220+ 52

8 34 ? c:

11 -r-44J 5 16 106 18 20 ? ....12 co....c ='

4 97 16 16 ?

,..

13 40J

u u 2

2 92 17 13 ?

14 49m ::s co

M 1 1 240 12 52 ? co

15 G) 1 175 14 38 ?
....

o

Table 1.- -Number of earthquakes and minutes of tremor recorded on seismographs aroun

Kilauea Caldera (Cont'd)

Tremor Number of Earthquakes

(m = minutes)

Date Kilauea SU11IIlit ·SW Rift 1/ 2/ (1970) Upper- Lower- Inter- Long and East East

Deep mediate Shallow 30 KM Period Shallow Kaoiki Rift Rift Others 

June 16 1 143 14 24 ?

17 39m (U o 4J 11 132 15 11 ?

18 4,J.,... UJ 12 92 22 15 ?

19 eu4,J eu 71 123 11 23 ?

20 tU > ....... .u 18 80 14 11 ?

21 pO g.-f'"4 5 42 11 12 ?

22 o =' ... e ... 10 151 22 19 ?

23 eu.u a en 5 456 18 37 ?

24 o ... tU J.I QS QJ 2 11 140 16 18 ?

25 '4-4 QJ r: ... 1 88 8 7 ?

26 9m co OJ C en g. 1 51 12 12 ?

27 .... w-f 2 4 75 13 11 ? ""' OJ :s

28 tU > :s eu 3 82 11 12 ?

29 """ .... .c CJ .&oJ 5 57 12 12 ?

30 1 319 16 15 34

J'&4w-fO

1/ Upper East Rift count poor due to continuous tremor and traffic.

1/ Count taken from station Puu Honuaula (PHO).

f.
..

Computer analysis of the Hva network data perm:its the systematic treatment of far more earthquakes than was possible previously. This extended

coverage should permit a more detailed examination of the relationship between

earthquakes and volcanism in Hawaii.

Table 2 is a chronological listing of successfully located earthquakes.

For each event the following data are presented:

Origin time in Hawaii Standard Time: date, hour (HR), minute (MN) ,

and second (SEC).

Epicenter in degrees and minutes of North latitude (LAT N) and West

longitude (LONG W). Poor convergen~e of the epicenter solution is indicated

by"?".

Depth - depth of focus in km. Assumed depth is indicated by "x".

Mag - magnitude, if determined.

NO - number of stations used in locating earthquakes..

GAP - largest azimuthal separation in degrees between stations.

DMIN - epicentral distance in km to the nearest station.

ERT - standard error of the origin time in seconds.

ERH - standard error of the eptcent(~r in krn.

ERZ - standard error of the depth in km.

MD - mean deviation of the time residuals. [= Ri INO] where

R is the observed seismic wave arrIval tim'e less the carol

h th · puted time at t e i statton.

Q - solution quality of the hypocenter. This mea~ure is intended

to ind:icate the general rcli.ability of each solution:

g Epic.~nter Focal Depth -

A excellent good

B good fair

C fair poor

D poor poor

11
Q is based both on the nature of the station distribution with respect

to the earthquake and the statistical measures of the solution. These

two factors are each rated independently according to the following

scheme:

Station Distribution

NO GAP DMIN

A > 8 < 1200 < DEPTH or 5 km

B > 6 < 1500 < 2 x DEPTH or 10 km

C > 6 < 225 0 < 50 km

> 4 < 1800

D Others

Statistical Measures

ERH(km) ERZ(km) MD(sec) RMAX(sec) *

A < 1.0 < 2.0 < 0.1.0 < 0.25

B < 2.5 < 5.0 < 0.20 < 0.50

c < 5.0 < 0.30 < 0.75

D Others

Q is taken as the average of the ratings from the two schemes, that

is, an A and a C yield a B, and two n's yield a B. When the two

ratings are only one level apart the lower one is used, that is, an

A and a B yield a B (Hamilton and others, 1969).

The criteria for Q are the same as used by the Office of Earthquake

Research and Crustal Studies, u.s. Geological Survey.

*RMAX is the maximum residual

12
OF EVENTS

1970 HR MN SEC LAT N LONG '- DEPTH MAG NO GAP Of-'1IN ERT EHH 

APR 1 2 19 35.4 19--23.9 7.1 1.7 11 93 1.0 0.13 0.4 

1 M 10 4Q.4 155-11.3 25.4 2.3 Itt 8b 6.ts 1.1 

1 15 33 3t,.5 l<J-IA.tI 155-15.5 9.2 ?4 18 198 _.0 0.12 0.'1 

t!. 3 3 9.4 1'J-23.8 155-17.2 3.0 l.A 13 86 1.0 0.03 0.3 

2 4 58 12.2 19-24 •• 155-25.61 11.1 2.0 16 17 8.7 O.Ob 0.6 

5 57 155-14.1 9.3 ?2 18 6.0 0.1 1.0 

2 7 50 1.7 19-23.1 155-17.3 3.5 1.4 9 119 l.t) O.Ob 0.5 

2 8 J2 6.7 155-23.6 32.6 12 220 12.t:s 0.70 

2 12 13 21.7 9.7 11 115 3.1 2.7 6

2 12 18 47.5 19-23.1 155-17.&1 3.3 t!.O 13 1.a., O.OC) 0 •• 

2 14 21 SQ.2 19-20.0 155-39.1 7.0 11 223 10.0 0.25 1.6 0

t. 15 41 31.4 155-17.1 2.9 1.7 10 III 0.7 O.Oj U.2 0

2 II 30 46.7 19-20.1 3.2* 5 212 10.9 2.1d 16.b 

w 2 22 45 :lR.5 155- 4 .... 4. 1 2.0 1& lQ9 10.1 0.22 1.4 

j 1 3S 19-73.- 155-17.6 2.4 1.8 12 69 1.3 0.11 0.1 

j 5 16 }9.2 19-ZS.6 10.5 2.2 15 63 1.u 0.5 0

j 20 3.8 a 172 3.7 O. 11 0.4 2

j 13 30 29.4 19-26.2 155-24.2 7 18u 6.7 0.00 0.6 0

3 13 38 21.7 19-23.2 155-17.4 3.0 l.b 11 6l 1. 1 O.OJ 0.3 0

3 15 17 4q.4 19-23.3 155-11.2 3.0 1. 1 11 91 o.a o.o.J O.l 0

3 15 22 Sf.\.9 1\l-23.8 155-17.2 2.2 1.0 9 122 1.0 0.07 o.? 0

3 0 19-20.8 155-18.li 5.4 2.0 12. 141 2.4- O.1't 0.1f. 

J 16 42 5.7 155-17.41 2.b 1.0 9 71 1.1 0.27 1 .1 3

J 1 7 33 13.6 19-23.8 155-17.3 2.2 0.9 9 112 1.2 O.Od 0.4 0

3 18 41 21.8 19-22.3 155-17.1? q.2 1.6 14 82 2.1 0.24 1.6 

3 22 24 9.2 19-23.0 155-15.2 3.6 1.3 11 83 1.7 0.08 0.5 

4 0 25 46.2 19-23.5 155-11.1 2.1 7 141 0.6 0.04 0.1 0

4 0 38 12.3 19-22.0 155-19.4 1.2 8 161 3.2 0.10 o.s 0

.. 0 58 10.5 19-23.8 0.1· 0.1 8 137 1.8 0.24 i.2 

4 1 45 44.9 19-24.2 155-17.3 1.9 2.0 14- 62 1.0 0.08 0.5 0
SUMMAkY Of SEISMIC EVENTS (CONTINUEO)

1910 HA MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH ER

APR 4- 1 52 40.7 19-24.2 155-17.3? 3.6 1.0 8 121 1.0 0.10 0.6 0

4 2 il 12.2 19-21.J 155-14.4 30.0 1.8 18 147 1.8 0.16 1.0 1

4 2 53 21.7 19-20.4 155-10.4 1._ 15 2')2 2.1 0.25 1.4 0

4 5 11 24.0 19-22.8 11.8 10 123 4.7 O.li O.A 1

4 Cj 33 31.5 19-23.5 15S-17.0 2.3 1.0 10 139 0." 0.3 04 7 2 3Q.O 19-23.6 155-17.0 2.3 7 136 0.5 0.10 0.3 0

4 10 37 27.5 19-24.1 155-14.7 3.1 8 20Q 3.d 0.01 0.3 0

-. lb 4?9 l(j-lQ.,+ 155-10.5 7.0 11 24fi 0.42 2.4 1

4t 16 1+1 43.l 19-13.9 155- 0.21 7.5 2.7 18 211 u.8d q..2 1

-

16 43 37.9 1'1-21.4 155- 9.0 7.3 11 262 1.9 O.2f- 1.5 0

4 11 57.2 155-12.6 q.2 14 181 1.7 0.16 1.0 0

-

1M J5 2Q.4 lCJ-lA.O lSS-lCfo.2 11 237 b.t; 0.31 1.8 0

4 18 44 19-41.0 156- 0.3 fl.O· 5 328 63.0 1.53 

It 13 3q.8 19-21.7 155-44.6 "i. I) 12 237 l8.1! O.3d .1 0

It- 20 36 IH.6 19-23.3 1t.4 1.3 12 81 2.0 0.11 0.5 1

14- to 4.8 1'1-20.2 155-16.2 13 203 2.0 0.11 0.7 0

4 21 2q 2.1 155-11.9 3.S 2.3 13 71 O.IU 0.6 1

4 22 24 33.1 155-17.3 2.3 0.7 11 R4- 1.3 0.02 0.2 0

4 22 it3 16.9 lCJ-lQ.3 155- 0.6 11.1· 11 342 17.1 1.55 9.5 

If. 23 514 q.9 19-22.0 155-17.1 4.1 1 • 1 13 81 3.0 0.12 O.S 1

5 '; 23.0 19- 9.2 156- 3.11 20.6- 6 373 46. ·1 A.4n b1.A 

5 :; 48 51.2 19-13.5 155-17.1 1.0 11 q1 O.h 0.02 0.1 0

5 3 54 c.;Q.9 lct-Zl.l 1& 112 2.3 o• 1it 0.9 0

5 5 13 12.5 19-23.4 155-15.0 1.9 1.0 12 93 2.=i 0.05 0.4 0

5 6 38 55.9 19-28.5 155-53.01 5.6 1. 173 b." 0.19 1

5 7 0 43.9 19-23.2 155-17.9 ,+.5 1.2 12 119 l.O 0.17 0.8 1

5 1 16 37.7 19-23.4 155-15.1 2.'.; 0.5 10 Ql t!.4+ O.Od U.5 O

5 7 59 q.7 19-23.2 155-17.31 3.1 1.6 13 60 0.04 0.3 0

5 Ij 30 49.3 19-23.0 155-17.3 3.0 1.1 13 h2 1.2 0.04 u.3 05 <J 25 31.0 19-26.8 155-22.7 11 • 1 2.4 16 tJq 3.8 0.01 0.8 0



SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG DEPTH MAG NO GAP DMIN ERT ERH 

7 b 23 19-23.8 155-17.4 2.5 0.6 8 131 1.2 O.2Q 0.7 

T 6 26 34.4 19-23.8 155-14.7 4.2 1.0 6 260 3.3 0.16 0.5 

7 7 25 13.1 19-23.'J 2.1 0.3 6 133 1. 1 0.01 0.2 

7 8 2 23.1 19-19.0 155-15.8 12.1 1.5 9 217 3.4 0.1 

7 23 30.9 10.U 12 124 O.lJ 1.0 

7 9 2 4.2 19-23.9 155-14.7 3.4 1.1 8 201 3.4 0.3 

7 10 Q 5.3 0.9 1 140 O.1j O.lA 0.6 

1 10 13 37.1 155-18.7 2.Q 0.7 1 lSI 2.5 0.03 0.2 

1 10 11 30.h 19-24.5 155-11.61 8.0· 1.4 7 317 8.3 0.341- 5.9 

1 10 i.1 1.1 19-23.9 155-17.2 2.2 0.7 6 131 1. 1 0.10 0.2 

7 13 33 17.3 lfi-23.b 155-11.1 2.0 0.8 7 13£ O. -, 0.22 

7 13 44 155-23 •• 12."1 2.7 lb 250 0.33 

7 14 0 32.5 19-32.2 155-57.21 0.2 2.3 15 271 •.,.5 0.64 H.4 

.....

Q:) 1 1... 17 10.2 11 • 1 1.5 10 189 O.4b 0.8 

1 14 24 27.3 19-21.1 2.6 17 157 1.6 0.01 0.1 

1 14 2q 57.a 19-23.7 155-17.1 2.7 0.5 6 132 O.A 0.13 u.3 

7 IS 3d 155-14.B 3.1 O.A 8 Id4 2.fj 0.06 0 • .3 

7 4+0 3.8 19-23.9 1!;S-lb.9 2.7 0.7 b 147 0.9 lI.3 

., "2 4q.3 lQ-20.4 3.7 0.6 b If\9 3.b 0.1'+ 0.6 

1 SO 3.5 19-23.1 155-11.61 A.O- l.l 8 316 6.9 0.38 4.7 

7 15 5P Sq.O 19-23.1 155-11.31 8.0* 1.3 7 317 7.3 5.3 

1 Ib ::.t4- 4H.2 155-11.0 3.6 0."1 1 140 O.b 

1 17 41 43.1 19-23.6 155-17.0 2.7 1.3 11 110 0.03 0.3 

7 18 17 q.it 19-24.2 15S-1S.Q 3.7 0.5 6 224 0.12 0.5 

7 18 26 0.9 19-24.1 155-16.5 2.0 0.7 7 179 1.3 O.2S 0.1 

1 18 27 42.3 19-23.3 155-15.3 4.1 2.0 12 88 2.0 0.10 0.5 

7 18 30 13.4 19-23.9 155- 9.6 b.8 1.1 8 285 1t.0 0.44- 5.4 

7 Id 35 17.1 19-23.1 155-15.5 4.4 0.6 6 209 1.1t- a.IS 0.5 

7 18 41 45.4 19-23.8 155-14.6 3.0 1.3 8 201 3.4 0.06 0.3 

7 18 51 59.3 19-23.6 15S-17.0 2.8 0.6 10 112 0.4 O.Oc 0.2 
SvMMAHY OF SEISMIC (CONTINUED)

1970 HH f'4N SEC LAT N LONG w DEPTH MAG NO G"P OMIN ERT ERH ER

APR 7 18 59 4q.7 19-23.9 155-17.2 2.5 0.4 7 12b 1.2 0.1 0.

7 19 4 5q.8 19-23.2 155-17.0 2.9 1.3 12 0.5 O.Ob U.S 0.

1 19 15 26.3 19-23.1 155-14.M 3.5 0.1 7 171 2.4- 0.11 0.8 1.

7 19 43 26.6 19-19.9 155-17.0 9.1 1.0 11 210 0.1 0.1. 0.7 0.

7 19 43 51.9 19-25.4 155-16.41 3.4 0.·7 'J 255 1.4 0.56 1.5 2.

1 S2 5.1 19-23.9 155-14.9 ::J.9 1.5 8 191 3.3 0.16 0.6 1 •

7 to 11 32.7 19-23.4 155-17.41 2.8 2.1 15 cl 1. 1 O.Ott 0.15 1 • 

7 20 11.8 19-23.1+- 155-17.1 2.& 0.1 Ii 143 0.07 u.2 0.

, t!O 1+2 13.1 19-21.4 155-16.8 1 1 • 1 0.7 8 130 0.06 u.S 0.

7 21 0 11 .9 155-11.3 1.9 0.3 6 133 1.0 0.04 0.1 0.

7 21 34 34.0 19-20.4 155-15.8 ll.q 1.5 10 181 2.6 0.17 1.0 1.

7 22 27 1 1 • d 155-17.1 1.0 12 92 O.b 0.0] 0.2 0.

7 22 37 r.;.4 155-32.9 "1.7 2.3 13 164 0.1'+ 1.5 O.

'-C 7 22 57.6 19-1B.9 15.3 l.b 8 263 S.b O.3l 1. 2.

1 23 3 41.3 155-15.67 8.0· 1 • 1 ·7 317 7.4- O.Q5 'i.7 

7 Q 3H.Y 19-23.6. 155-24.1 11.3 1.6 8 213 6.4 0.21 ,1 .0 1.

7 23 2Q,.1 3.0 19-23.7 lS5-}4-.Q O.t!* 1.0 12 3.l. 0.4 

7 ".9 -..2 0.5 6 240 2.1 0.1S 0.6 0.

7 23 Itb 48.4 155-11.3 1.0 0.6 7 127 1.3 u.2 O.

7 23 54 37.2 155-14.8 5.9 0.7 b 165 2.0 0.09 0.3 0.

8 0 2q.8 155-17. 0 1.9 n.B 11 ql 0.4 O.Ob 0.4 0.4

b 0 lH 7.1 19-23.1 ,3.1 '0.6 -J. 0 1. o.Uo 0.4 0.

H 0 II lo.q '1 'l-23. 1 155-17.31 3.1 ·O.A lit- 61 1.0 0.3 0.

t; 0 42 12.3 19-23.7 0.7 O.l 7 13b 1. 1 0.16 0.6 2.

d u 1?8 19-23.9 '155-17.5 1.8 ·'0.5 7 128 1.4 0.3 O.

8 1 J 2.3.6 19-23.3 155-14.6 4.4 a.R 7 lAtt 1..9 0.10 0.4 0.

8 1 q 6.2 19-23.5 155-!4.Q 1.8 0.9 12 94 2.7 0.06 0.4 0.

H 1 '+0 4t-t.7 18-56.9 154-Sf4.8? 8.0· 2.2 7 356 54.3 7.71 0.0 

8 1 55 26.4 8.0* 1.0 6 213 2.Q 0.41 3.2 

d 1 56 51.0 l'i-lS.l 155-18.3 16.1* 1.4 5 328 13.5 0.42 i!.9 
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1970 ...R SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH 

APR 8 3 13 40.5 19-23.2 155-17.4 2.8 0.4 9 115 1.1 0.01 0.6 

6 J 14 50.2 19-23.7 155-14.9 1.& 1.0 12 t.jl 3.0 O.(j8 (1.4 

8 3 21 59.4 19-23.1 155-17.4 3.2 0.9 10 lid 1.1 O.Of;) 0.3 

8 3 24 19-23.9 155-13.5 5.5 0.7 7 2Q"' .... 9 1.2 

8 It 4.2 19-.24.3 155-11.71 0.1 0.5 10 93 0.7 0.1-- 0.6 

& 5 21 0.6 19-'22.4 155-16.6 4.4 0.7 7 2'23 l.i 0.16 1.5 

H 6 18 15.6 19-23.5 155-17.6 0.9 12 111 1 .... O.Ob 0.5 

t4 6 30 2Q.4 IS5-11.0 3.1 7 147 O.it u.4 

8 6 31 3J.l 19-23.4 155-17.3 i!.5 0.6 6 148 O.b 0.06 0.1 

8 6 38 34.5 1'1-23.6 155-14.7 3.'j l.n 7 200 3.1 O.OJ 0.2 

8 1 17 33.8 19-23.8 155-17.5 4.0 0.8 10 10- 1.4- 0.24 1.1 

tI 1 33 _5.4 19-23.7 155-17.0 2.4 0.4 7 IMl 0.1 0.20 1. 1 

ti 8 JO 34.2 19-24.0 155-11.2 3.0 fJ 101 1.3 0.03 0.2 

N it 'I 2.3 31.9 19"'23.4 7 Q.' 0 1.9 0.1 . .) O.b 0.11 0.4 

8 10 1 17.0 19-23.5 15S-17.1 2.2 O.Q 6 141 O.b u.1 

8 10 14 27.1 19-23.2 155-17.2 8 q8 O.OJ 0.2 

8 11 0 4q.8 lQ-lO.8 1.9 18 lA2 2.3 0.10 O.R 

8 11 17 16.7 0.7 1 ".0 O.q.l 1.5 

8 12 7 30.6 19-23.6 lSS-11.5 4.1 2.1 14f. 1.::1 0.10 0.5 

8 12 11 43.2 .19-21.2 155-17.01 A.O· 1.0 7 133 2.1 1.63 ti.S 

12 19 0.1 19-19.Cl 155-16.4 12.0 1 • 1 7 2"" 1.7 0.21 O.R 

8 12 30 47." 155-17.3 Z.1t 7 q7 0.9 O.lJ \).3 

8 12 31 24.2 155-17.1 3.1 0.7 f\ 149 0.6 0.20 0.4 

8 13 18 q.5 19-23.4 3.4 1.0 8 189 3.1 O.Ob 0.3 

8 13 lt9 18.3 19-23.5 155-17.3 2.0 0.5 6 144 0.8 0.07 0.2 

8 13 52 45.8 19-13.5 155-17.1 2.8 0.5 7 141 0.0 0.10 0.5 

8 14 7 54.6 19-23.5 155-17.3 3.0 0.9 7 141 0.8 '0.13 0.5 

8 14 23.8 19-29.5 155-50.8 2.3 15 154 0.06 0.7 

14 59 53.2 19-23.0 155-17.2 2.3 0.9 9 109 0." 0.03 0.2 

8 4.2 19-21.q 155-10.1 5.1 1.2 7 208 0.2 0.76 5.2 
OF SEISMIC EVENTS C(':ONTINUEO)

1970 r1N SEC LAT N LONG W DEPTH MAG NO DMJN ERT ERH 

APR M 10 4 3.8 19-18.3 155-12.Q 11.2 11 6.7 0.21 1.1t- 

H 16 21 32.1 19-20.2 15S-15.H 9.8 1.0 8 208 2.8 0.7 

tj 16 38 31.1 19-23.1 155-14.6 ... 1 1 • 1 8 195 3.3 0.10 0.3 

t; 16 59 22.7 19-23.5 155-1 2.2 0.1 8 109 O.b 0.06 0.2 

8 17 21 34.S 19-23.1 155- 1.6 7.8 1.9 15 15.0 O.2b 2.0 

18 28 17.2 19-20.9 155- 0.9 n.1 1.8 18 227 1b.1 0.21 J..7 

b Itj '+? 54.4 19-23.4 155-15.4- 4.3 1.0 7 231 2.0 O.lO 0.9 

d 18 '+S 2Q.O 19-23.6 155-14.5 l..9 O.Q h 200 J.'+ 0.12 0.6 

8 llj '-'8 2Q.4 155-17.0 0.1 8 16'+ 0.6 O. 1 U.4 

18 50 25.4 2.2 0.7 b 143 O.t O.Ot; u.2 

A 19 0 3,.2 19-24.4 155-16.7 4.4 1.0 7 226 O.2t) 

t:i 20 1 34.5 19-24.6 155-10.01 H.O" 1.5 H 216 0.27 b.8 

H 20 4 38.1 155-10.61 6.3 1 • 1 b 193 1 • 1 1 • 1 U b.f. 

N 8 20 1 1 3'3.A 19-17.'+ ISS- l.i.l 7.ti 1.8 12 243 16.3 2.7 

8 21 3Q 13.9 19-20.4 155-17.97 1.0 7 206 1 • 1 O•.3-1 2.0 

8 21 ]9.6 155-52.1 f.l 15 143 f1.1 o• 11 1.4 

8 21 =>6 19-2?6 155-14.8 5.1 1 • 1 5 161 l.d 0.0 

ti ?2 15.7 19-22.3 155-?2.9 -r.t. 1 • 1 8 167 3.8 0.48 1 • 1 

'J 0 47 58.1 19-22.6 3.9 1 • 1 .11 0.20 0.9 

9 1 0 11.5 lq-17.9 155- S.A? 1.3 9 304 7.5 0.b8 4.0 

9 1 59 10.6 19-14.1 155-13.51 A.O" 1 • 1 6 319 13.S 2.56 t!1.8 

9 2 1 36.7 19-21.6 2.6 0.3 6 187 1 • 2.4 

9 2 51.0 14.4- 1 .4 9 19'1 2.6 0.20 0.9 

9 3 28 lA.O 19-21.6 155-12.41 6.1* 1.0 6 189 1.0 1.1· b. 1 

') 3 32 47.q 19-19.9 155-11.8 1.5 9 231 it.'+- 0.07 O. ·7 

9 6 30 44.3 19-21.6 155-12.51 0.2 0.5 6 181 O.t' 0.26 

9 7 24 16.4 19-20.0 155- 7.11 15.5· 1.8 10 32M 6.1 0.97 7.4 

9 8 19 21.8 19-21.9 155-12.5 2.1 8 154- 0.5 0.12 0.9 

9 8 35 20.0 19-23.4 155-15.q 3.4 1.3 10 140 1.5 0.12 0.6 

9 16 46 lq.O 155-52.1? 7.0 2.q 157 7.0 0.10 1.4 
SU"'MAHY OF SEISMIC (CONTINUED)

1910 riH MN SEC LAT N LONG w DEPTH MAG NO GAP OMIN E

APR '1 1M 24 2.7 19-27.4 155-22.3 7.3 2.0 15 III 2.9 o.2i 1.7 1

9 19 57 25.5 19-22.6 1.7 1.7 13 67 Ito. 7 0.09 0.8 0

10 2 59 41.2 19-22.1 155-}8.2 28.5 7 141 4.0 0.-.9 2.5 4

10 4 42 SC;.8 19-10.9 155-25.6 34.2 2.6 20 lQ3 17.7 0.31 2.0 2

10 7 S4 13.7 19-21.- 155-11.7 9.5 1.9 1b 178 2.3 1.0 0

10 8 34 15.1 19-16.4 17.3 6 285 10.9 3.0 3

10 10 35.1 11.3 5 b.l u.o 

10 10 48 2,.4 19-1Q.7 9.0 0.3 8 240 1. 0.'; 1 

10 13 53.3 19-21.0 7 19b 3.0 0.2'; 2.«.1 1

10 13 54 51.a ItS-5h.8 155-2-..1 8.S 10 2A5 25.3 6.6 4

1u 15 37 17.8 19-20.3 155-12.01 Il.O It! 201+ 3." 0.11 0.9 0

10 46 15.0· 1.6 13 233 19.:'" 1.0 

N 10 16 27 19-20.Q 155-1A.5 20.0 11 1?5 2.5 0.20 1.1 2

N lCJ 1 7 5S 36.9 19-21.9 155-21.8 3.3 7 152 4.1 1.5 4

Iv 18 14 19-20.1 14.0 0.7 10 196 2.4- O.2u 0.9 1

1 0 23 13 31.4 19-22.9 155-24.4 8 lQ4 5.4 0.15 1.0 0

11 u 54.2 155-13.l IS.1 R 22b 6.0 0.14 o.q 111 1 32 34.9 19-22.3 155-19.7 25.5 1.9 Itt B7 2.1 0.16 o.q 111 1 47.1 19-22.1+ 50.1° 5 .2i!O 1.7 (0.0 

11 3 30 5l.7 19-22.9 155-23.6 12.1 b 188 4.9 O.2t.1 1.0 2

11 3 SO 37.9 155-47.1 ii.O 1.9 12 i28 14.b 0.09 U.8 0

11 6 44 19-22.3 9.0 2Jl 1.0 0.27 t!.2 1

11 7 31.8 19-20.4 lS5-15.t!. 13.2 0.6 9 2.7 0.23 1.0 1

11 8 10 J9./t .155-11.3 15.2° 0.8 b 320 7.3 0.24 l.O 

11 8 J5 24.8 19-18.4- lS5-13.M 8.1 7 234t 7 .1 0.73 3.2 4

11 12 0 11.2 19-19.6 15S-16.6 10.9 1 245 1.6 0.48 1.0 2

11 12 15 21.3 19-19.8 155-16.6 11.3 7 241 1. 0.14 0.7 1

11 15 57 43.9 19-26.6 155- 9.81 1'5.5 0.7 1 267 B.8 1.19 7

11 11 11 27.3 19-20.5 155-12.4 15.8 0.6 9 203 2.8 0.19 1.2 1

11 18 46 14.3 19-23.0 f..it- 10 150 1t.6 0.15 1.2 1
SUMMARY OF SflSMIC EVENTS (CONTINUED)

1970 rtR SEC LAT N LONG W DEPTH ,..4G NO GAP DMIN ERT ERH 

APR 1 1 19 0 16.5 155-12.0 e.o o 5 292 7.6 

11 1'1 29 21.3 19-20.9 155-23.4 Y.l 8 180 l.i. 0.11 1 • 1 

11 II 19-1B.5 12.3 13 231 0.10 0.9 

11 22 41 23.4 19-15.1 155- 7.8 1.4- 10 306 12.9 o. 3.7 11 23 17 4.6 19-10.6 15S-18.Q? 32.2 2.7 If) 231 1 7.6 0.Z4 1.6 

12 1 2h 50.0 19-17.4- 155-24.6 Q.2 1.5 7 215 5.0 0.31 0.8 

12 2 4 52.6 19-23.1 155-25.7 1.3 12 123 h.8 O.cJd O.A 

12 2 1 1 15.2 19-19.9 7.H 1 • 1 14- 20b 3.7 1 • 1 

4 15.0 155-22.b Q.2 11 154- 4.5 0.11 0.7 

9 13 43.1 19-22.9 10.5 4.3 b.u 0.u1 u.6 

12 9 17 40.0 111-23.4 155-25.9 2.2 17 !f)7 7.'j 0.10 U.Q 

12 9 20 lq.3 19-23.0 q.D 1. A 10 121 7.1 O.lU 

12 11 lQ 48.4 19-23.q 7.(:, 2.5 18 72 8.5 O.OH 0.1 

N 12 19 43 21.3 lY-22.7 9."l 2.3 11 116 11.4 0.1 

w 12 20 19-21.5 155-12.5 2.3 17 1. 1 0.9 

13 0 14 41.2 19-23.6 155-25.9 12.6 1.9 11 151 7.7 0.7 

13 1 4A.2 155-24.8 3.2 19 7t:. 0.0-1 V.R 

13 1 14 26.3 155-23.8 1.8 11 III 0.8 

13 2 59.C) 19-23.- 155-?5.3 10.8 1.9 11 122 6.9 0.01 0.6 

13 4 20.7 19-23.9 155-26.6 11. 1 2.0 15 145 9.0 0.0'7 0.6 

13 5 28 3.9 19-12.6 155-?2.4 2Q.6 2.0 9 204- 14.1 1.7 

13 7 4- 25.5 19-13.8 155-23.A 3';.3 2.'" 168 0.16 O.Q 

13 9 3q 47.0 19-22.6 155-25.9 1.0 2.7 11 101 11.u 0.09 0.8 

13 9 51 2).5 19-20.2 155-15.0 9.9 1.8 14 185 3.1 0.07 0.6 

13 12 1 .1 19-19.5 155-13.6 8.5 2.4 It> 198 4.7 0.14 1.0 

13 21 36 24.7 19-13.3 155- 8.0 7.8 1.9 8 253 16.1 ,0. 71 3.5 

13 21 41 10.4 19-21.4 155-23.4 10.2 7 188 l.2 O.7i 1.5 

13 22 26 14.2 19-21.5 155-tl4.9 2.2 12 3.7 0.13 o.q 

13 22 41 A.I 19-23.0 155-25.7 10.7 I.e 12 123 6.7 0.09 1.0 

13 23 13 11.2 19-24.2 15S- 2.5 2.1 13 190 13.8 0.14- 1.2 
SlJMMAHY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

APR 13 23 24 26.9 19-22.1 3.3 1.3 6 181 0.5 0.71 l.5 3

13 2J "'1 54.6 155-16.7 9.8 2.2 18 161 3.4 0.08 0.6 0

14 2 1'3 1.8 19-19.6 155-16.3 10.1 1.6 13 203 2.1 0.09 0.6 0

14 7 31 24.4 19-19.0 155-15.8 9.9 12 217 0.16 0.9 0

14 11 7 57.4 155-14.4- 24.3 3.b 24 62 6.b 0.14 1.0 1

14 12 58 25.9 19- 7.4 156- 4.1 8.0· 3.2 17 281 46 •. 5 0.60 3.9 

114- lit 13 6.0 19-12.3 155-21.A 29.7 2.• 5 11 251 14.q O.9Q 4.2 8

14 15 b2 '5.7 19-39.- 155-59.0 45.1 2.7 7 16.5 1.21, 5.5 11

1'+ 11 10 19.7 19-11+.3 155-30.9 8.3 2.3 13 141 11.0 0.08 0.8 0

0 -f 12.3 155-1&.1 2k.8 18 121 2.2 1.0 1

15 1 27 12.7 19-21.8 9.9 2.1 16 141 0.8 0.8 0

42 19.6 155-24.5 10.7 2.3 14 109 2.2 0.08 0.8 O

15 3q 19-19.6 155-16.0 2.4 16 162 0.7 0

N 15 J9 45.5 19-15.7 155-21.5 .1 2.3 17 166 U.1 0

1:; t!2 41 31.2 19-16.7 155-22.2 8.3 2.0 16 160 6.8 0.10 t).9 0

10 2 t!5 lC1-1B.8 155-15.0 28.4 3.2 21 170 4.q 0.15 1.0 1

Ib 23 7 19-23.0 155-25.0 1.9 lit 6.0 0.14 0.9 0

1-' 12 9 24.9 19-21.1 155-13.9 1.5 14 113 2.R 0.14 0.9 0

17 12 12 13.6 19-31.b 155-55.5 10.4 4.1 21 227 0.7 0.23 1

17 16 12.1 19-20.6 155-11.5 1.5 2.0 13 20& 3.3 O.lli 1 • 1 0

17 11 46 ?9 19-30.1 2.0 2.8 14 130 18.l 0.44 1.0 2

17 18 54 2".5 155-26.6 10.4 2.0 12 lO.b 0.10 u.A 

1 7 22 34 l7.8 19-25.2 lS5-50.2 7.9 1.Q 12 270 29.Y 1.33 ll.d 2

18 1 41 41.4 19-18.3 155-11.b 11.3 1.3 11 222 7.1 0.27 1.9 O

18 6 38 lQ.7 19-13.Q 155-23.9 21.1 1.9 16 171 11.7 0.20 1.0 2

18 b 45 6.8 19-19.1 155-16.3 10.1 8 261 2.7 1.03 l.4 4

1 31 47.5 19-19.6 155-10.5 7.1+ 10 24'7 ".1 0.20 1.7 o

18 11 '+0 30.9 19-46.0 15S- 2.31 4.2 2.0 9 283 1.3 O.2d 1.4 0

18 12 54 37.9 19-19.6 155-16.1 1.9 12 206 2.4 1. 1 0

18 14 53 19-10.3 155-38.9 10.3 3.0 12 161 9.1 u.ll 1 • 1 0
!')F SE Y5" I C

1910 t-R SEC LAT , LONG W DEPTH NO GAP O""! Ef.' T EF H 

APr 18 24 3 8. c: 19-20. 7 155-21.6 9.q 10 14C 7.6 o. 13 1 • 1 

13 If 3 56.3 10- o. C 155-11. 0 fJ.2 1 1 196 3.7 O. 14 1 • 1 

18 17 14 34.7 1q- 26. 1 155-1C.<i? <;.8 1. 5 q 250 8.1 o. e1 3.q 

19 3 12 30.7 19-20.2 15 5-1 q 7.8 14 lq2 2.7 0.16 C.9 

lq ']- 18 8. 3 19- 2 8. <; 155-46.5 6.6 2.1 14 16.0 0.16 1.4 

19 c., 30 38.p 19- 15 • 7 155-46.5 26. 1 3.2 23 153 9.2 C.16 1 • 1 

19 t 7 1. 4 19-13.4 32.9 2.3 11 171 12.5 O. 28 1.5 

1'; E 48 45. q 19-22.9 155-25.3? 10.7 9 204J 6.1 0.2l 1. I) 

19 E 53 19. 2 19-16.8 155-21.6 23.4 10 30n 9.5 1.05 S.q 

lq <; 29 48. 1 19-24.9 155-26. ? 9.5 14 1 31 I c. a o. 11 0.9 

19 1 t 1 16. 4 19- 1 g. C 154-56.<1? 0.0 2.2 8 254 19.3 1. C7 2.5 

19 1<; 45 1 '). 1 lq-ll.3 155-3C.7 5.8 1 164 13.0 0.12 1 .1 

N 20 1 3 5'"-. r;-' 19-24.1 155- 2. 7 0.3 1.9 14 171 1 8.6 0.46 c.q 

V'1 20 1 52 21. 7 19-20.0 155- 2. 1 5.2 1. q q 231 21.5 0.55 1.2 

20 E 44.1 19-23.9 155- 7.5 6.7 9 2""je.. 5.0 0.32 1.8 

2J 1 7 41 10 .2 19-21.3 1 55- 25. 3 8.5 2. 1 16 12 C 4.(1 O.Cq e.8 

2 1 14 53 44.7 155-11.2 29.4 2.5 19 90 2.5 0.19 1 • 1 

21 2 1 4 1.7 19-10.3 155- 38. 1 7.6 2. 6 13 204 8.7 C. 14 1 .5 

22 C 26 40.1 19-21.7 155- 2. a 6.8 2. 3 13 218 14.1 O. 35 2.5 

22 3 8 1 19-24.5 155- 4. 1 3.2 2.5 13 16<j 20.3 0.14 O.q 

22 Ie 0 6.<1 19-18.9 155-17.3 26.2 2. 3 13 218 2.3 O.2C1 1.6 

22 1 7 5 9.7 19- 1 7. c; 155-16.4 9.3 2.2 14 204 4.5 O. 10 0.7 

22 1<; 15 54.4 19- 23. 1 155- 2 4. 7 lC.4 2.4 15 20C 5.8 0.16 1 • 0 

22 2C 56 11. 3 19-23.4 1 S 5-24. 7 9.5 2.0 15 75 6.4 0.01 C.7 

23 «; 16 1. 4 20- 2.3 155-47.61 14.0* 3.3 20 262 9.7 O. 72 4.q 

24 it 36 5. 4 19-22.8 155-25.q 10.1 3.0 18 1tJ 6.5 O.C9 0.7 

24 1 56 4<1.4 19-56.4 155- 31. 5 10.0 2.3 7 21C'J lq.5 0.25 2.0 

24 1<; 51 21.7 19-17. ':5 155-2 8. 0 5.4 10 136 <1.6 O.C<; O.q 

24 2C 38 14. 5 20- 9. 7 156- 18. 6 2.1 3.3 23 31) 5.4 0.34 11.3 

24 SO 34.4 19- 2 a • 7 155-13. 2 9.8 1.8 14 186 4.2 0.13 0.8 
SUMMARY UF SEISMIC EVENTS (CONTINUED)

1970 r1R MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT E.RH E

APR 25 0 46 Sq.3 19-22.9 155-29.0 9.3 2.1 15 97 16.2 a.Od 0.7 0

25 1 2" 47.8 19- 9 •• 155-27.11 40.1 13 178 1.8 3

25 2 2.3 19-16.1 155-?7.3 1.0 8 202 10.3 0.25 1

25 3 '+1 53.5 19-21.3 IS5-12.0 Q.9 13 181 -3.6 0.17 1.2 0

25 6 48 32.5 5.8 8 196 15.1 0.20 1.5 1

12 6 3l.6 19-24.0 155-24.1 8.1 2.4 13 8J 7.1 0.06 0.6 0

25 14 32 52.1 155-24.6 11.4 9 137 6.7 0.07 0.6 1

25 20 10 lli.t4 155-24.8 9.5 10 230 3.£ O.l'i 1.2 0

25 20 ';'4 155-2fi.O? 2.7 Ib 1&3 0.10 v.A 0

2 52.7 }'1-20.5 Q 164 4.4 0.17 0.5 2

21 55 1n.1 155-39.3 9.1 b t!43 27.d 0.92 5.0 3

2b 2 10 19-10.6 9 181 16.6 0.14 1.2 0

2b 2 26 155-24.8 3.2 18 7:' 7. 1 0.07 0.6 0

N

0\ 26 3 lA 155-47.q 12.1 9 338 0.54 3

26 4 18.6 lSS-3R •• ? 13.4- 7 292 0.33 2.1 

2h S 4Q 19-17.2 155-41.9 6.- 5 2b.d 0.0 

2b '+8 4C;.9 19-21.5 15S-13.b 8.4 2.6 163 2.6 0.11 1 • 1 0

lo 16 48.6 19-11.6 0.3* 9 270 2.8 

26 19 "'1 59.6 19-23.3 155- 2.6 7.8 9 13.2 0.24 3.0 1

27 16 0 lA.3 19-12.0 A.3 2.1 18 161 15.7 0.09 0.8 0

27 19 IS 11.6 lQ-20.'+ 155- 8.b 2.0 14- 3.1 0.1 q 1.2 1

28 3 14 2Q.7 19-25.2 154-51.A 3.5 2.5 1 2a3 1.4 1.01 4.6 3

28 6 Q 20.8 !"l-26.3 155-14.1 31.3 2.1 17 ti7 5.7 0.19 1.2 1

28 6 4+7 5.2 19-23.2 155- 3.6 14.3 8 197 0.06 0.7 0

28 7 57 10.1 19- 4.2 156-21.91 A.O· 9 335 81.1 4.3U 26.5 

28 8 6 17.7 19-20.6 155-11.1 lO.b 2.3 15 204 3.6 0.16 1.1 0

9 1 2.5 19-48.8 155-4".1? 3.6 2.9 22 171 25.2 1.54 17.9 1

2ti 13 36 35.5 19-20.6 155-29.2 €l.6 2.2 15 108 10.4 0.09 0.9 0

28 15 23 5.3 1.5 3.5 17 208 4.9 0.31 1.1 1

28 16 J9 38.9 19-45.9 156- 6.91 0.2 9 270 1.98 4.8 6
UF SEISMIC EVENTS (CONTINUED)

19-,0 HH MN SEC LAT N LONG w DEPTH MAG NO GAP DMIN ERT 

AfJR 28 16 55 56.4 19-15.7 154-42." 28.7 2.1 19 2Q5 30.'1 0.61 J.S 

2b l.2 22 25.9 19-19.4- 155-13.8 1.8 16 lq- 5.1 U.1 

29 {) 11 17.2 19-19.9 155-28.'1 8.4 I.A 13 117 9.0 0.10 1• 1 

29 2CJ SA 51.1 19-21.6 155-16.7 27.1 2.7 19 117 2.1 0.12 0.8 

29 21 45 19-19.6 155-14.1 10.2 1.6 16 193 1+.6 0.07 0.6 

30 2 18 19-13.2 155-27.4 28.0 2.4 i6 158 15.2 0.25 1.2 

30 5 32 13.5 19"19.5 5.b 6.6 1.2 18 lql 0.20 1.5 

3u 6 7 1.6 19-22.3 155- 7.H 10.7 3.9 21 ?3U 4.0 0.11 1 • 1 

0 1+0 14.7 19-21.9 6.f4 10 163 0.2:) 1.4 

30 8 30.5 19-25.2-154-55.51 2.4 0 2.1 1 28b 31.,+ 0.34 1.7 

30 1't 44.6 19-24.2 155-24.q 1 • "I 14- 123 7.8 0.0-'; U.4- 

30 1b 25.8 1'1-23.'+ 155-13.41 13.70 1.7 5 30b ,.., O.31-i o.q 

3(; 18 56 30.7 lq-12.3 155-22.3 12 206 14.7 O.3U 1.6 

N

'-oJ 30 J2 3Q.l lCi-14.4 32.4 3.Q 23 161 11 • 0 0.29 1.6 

3u 21 17.8 19-12.2 30.9 12 204 14.d 0.31 1.7 

30 3i! 32.5 19-12.3 31.8 2.3 10 20Cf. 14.7 0.43 

1 5 10 1 1 • 1 lQ-20.2 11 .4- 1.9 9 149 '1. Q 1 • 1 

1 6 31 11.5 19-30.8 155-35.21 15.1 2.1 fj 20.'1 0.13 0.9 

1 8 53 25.0 19-22.3 10.3 1.6 13 118 0.07 u.7 

1 9 0 59.2 20- 3.8 3.6 3.7 20 276 19.b 20.1 

1 lQ 1.6 19-14.0 155-17.6 42.9 1.9 14 219 1 1 • 0.31 1.5 1 4+b 4.3 19-19.q 1.S 4.9 t' 241 1Q.1 0.44 

2 '+ 12 44.1 19-19.6 11.4 1.6 13 214 4.1 0.13 1.3 

2 II- 13 ltJ.6 20- 4.1 R.O'" 2.0 18 319 27.h 4.10 q 

2 8 '+7 3,.9 19-2q.5 If,.8° 3.0 5 233 33.0 0.33 2.8 

2 11 22 7.2 19-20.6 155-13.4 9.1 1.4 14- 187 2.A 0.14 1.0 

13 17 15.5 19-1A.9 155-42.5 12.1 8 259 12.1 0.5:; 3.4 

2 15 13 31.8 19-21.5 155-1H.2 30.1 2.6 19 73 3.0 0.14 1.0 

2 I!:» 26 40.3 lQ-SO.3 155-36.6 2.3 10 137 17.7 0.08 0.9 

3 1 56 57.2 lq-44.6 155-43.3 37.3 2.7 18 144 O.4A 1.5 
OF EVENTS (CO,..,T I

1970 HH MN SEC LAT

N LONl-t DEPTH MAG GAP OMIN ERT EHH ER

MAY 3 3 36 15.2 19-1?O 155-34.5 8.2 6 141 7.1 0.13 1.4 1 • 

3 3 50 4Q.8 19-12.3 155-13.0 B."

7 147 8.h 1.3 1.

3 16.9 9.1 0.9 12 131 4-.0 0.07 u.7 0.3 6 47 32.3 19-21.9 32.0 2.4 2u 11 '/ 1.0 0.14 U.9 1.

3 7 30 35.3 19-2b.2 154-51.7 A.O· 2.5 11 292 39.3 15.4 

3 9 2.3 20- 3.1 155-31.6 50.1 3.2 18 lA.3 0.49 4

.3 itO 1+3 3b.O 2.5 21.2· 2.b i 1 25" U.22 1.G 

4 12 31 00.0 19-24.5 155-25.1 8.6 2.2 14 125 0.10 O.H 

4 14

S 0.8 19-21.4 7.7 1.2 1 14b 1.0 0.7 1

4 14 34 51.6 19-1Q.6 1.i. 2.6 13 120 0.11 1.0 1 

4 16 23 4R.9 19-21.5 155- 9.9 14.1 1.3

b 194- 0.6 O.Oc 1.3 0

If. 16 57 25.1+ 19-19.2 155-16.2 1.5 l-3 2.6 O.Ob 0.4 0

4 17 j2 2q.3 19-25.4 155-11.2 1.2 10 232 6.q 0.15 1.0 O

N 4 18 6 17.9 19-13.8 155--31.1 12 143 10.h o. 0.7 O

(X) 7.1 1.8

4 18 3b lQ.4 19-19.b 155--15.9 9.7 1 .0 14 189 2.t:i 0.0' 0.6 0

4 23

2 3.1 19-27.6 lS5-!'t.2? l.p 10 26b 7.u 0.'72 

5 0 52 15.8 19-20.5 155-13.3 2.1 17 166 4.0 0.13 1.0 05 5 26 5.2 19-21.4 155-11.4 1.5 1.5 14 159 0.11 1.3 05 ., 14 2.2 19-19.1 155- 6.9 22.4· 1.9

b 33b 7.1+ 0.04 0.8 

5 11 3y 5?O 20- 0.7 8.4 2.8 15 213 16.1 0.15 1 • 1 0

5 14- 411 41.6 19-2b.6 154-52.11 8.0" ?2 7 3.f.» 0.21 

5 15 11 21.4 19-1Q.4 155-13.8 A.6 1.4 15 211 O.le 1 .3 0

5 11 50 53.7 155-11.h 12.4 1.S

7 229 0.'31 1.3 2

5 19 jq IB.b 1'1-21.2 155-11.8 14.4 1.5

8 l8b 0.40 1.4 

5 23 13 57.3 19-12.8 155-?2.q 29.3 2.0 11 181 13.7 1.3 2

6

0 39 53.1 19-11.9 155-22.1 26.2 2.0

7 ?20 15.4 0.52 2.9 6

6

2 41 39.1 19-15.5 155- 8.1 24.4 1.8 8 242 11.1 0.23 l.O 2

6

4

4 26.8 155-14.0 9.0 1.2 16 168 4.1 0.08 0.8 0

b 5 20 39.4 19-27.7 155-13.31 8.0 0 1.6 11 276 8.- O.2fJ 

b

5 22 19-20.6 155-16.4 22.8 1.6 10 115 3.0 0.18 1.0 1
SUMMAHY UF SEISMIC EVENTS (CONTINUED)

1970 t.4N SEC LAT N LONG w DEPTH MAG NO GAP OM!N ERT ERH 

MAY 6 b 21 38.7 19-18.0 155--15.3 7.8 3.2 17 182 1.0 O.l4t 1.0 

b 6 36.7 155-13.7 15.6 1.6 227 6.0 0.04 o•.3 

6 b 24 12.4- .1 1.5 9 198 4.t:i 0.20 1.8 

b 6 2A 60.0 19-18.8 •• 1.7 6 227 5."'J 0.18 1.6 

6 9 4b 11.4 19-24.0 155-16.7 'l.o 0.8 8 164 1 • 1 0.20 o.s 

6 12 32 2.0 19-23.6 155-17.1 1.9 0.1 7 135 0.6 u.Ol 0.1 

b 18 10 12.5 155-10.0 q.O 2.5 19 175 2.1 1.0 

b 27 4C5.7 1\1-24.1 b.O 1.2 8 224 2.3 0.7·' 

b 22 3.3 155-.1.1 17.40 2.1 12 23-' 33.5 1.5 

1 2 21.7 19-23.5 155-16.6 15.7 1.8 16 92 0.4 0.07 0.7 

1 4- 1" 10.8 19-20.5 155-14.3 8.2 1.6 14 lAl 0.12 U.9 

7 5 2 3.3 19-23.7 155-17.2 1 ... 0.7 7 133 1.0 0.1.3 <1.4 

7 7 41 7.8 19-13.6 155-17.0 2.2 7 136 0.4 0.7 

N

\0 7 7 4+1 44.0 19-22.? 155- 9.8 7.1 I.A 14 243 0.9 0.17 1 • 1 

7 10 30 40.ti 19-12.1 155-31.3 "'.1 10 11.4 O.IV u.q 

1 17 22 19-19.- 155-13.6 9.Q 1.8 16 194 5.'t- O.Oti 0.7 

1 2J lR.O 19-33.2 155-56.9 30.7 ?A 12 27b 4.1 0.59 

7 23 58 15.2· 1.3 ?26 O.lQ 4.2 

b 1 Ib 5" .1 19-19.4 155-15.5 9.A 15 191 3.5 O.OR 0." 

ti 2 16 37.8 19-19.4 1SS-1l.A 10.8 1.8 10 265 5.,+ J .1 

2 25 58.9 19-12.8 155- 1.9 4.2 l.q 12 257 11.0 O.6j c.9 

8 J 15 5C;.4 19-22.1 155-?2.3 q.3 1.3 11 O.Oq 0.6 

8 9 0 19.8 20- 1.6 155-50.5 5.5 3.0 18 145 0.26 1.2 8 20 c.7 S.8 19-20.9 5.5 2.2 16 11.0 0.11 O.'J 

'1 9 to 50.1 19-22.9 155-11.1 .1 2.1 16 12\/ 0.01+ u.S 

9 18 4 1+1.7 19-}4.1 155-24.47 42.6 2.7 18 164 11.it- 0.2::» 1.3 

9 18 21 2".9 155-42.8 2.4 16 128 21.9 0.10 0.1 

C-J 21 9 1.6 155-27.6 13.4 1.8 10 216 10.3 2.2 

1U 3 1 21.1 19-13.2 155-l3.tJ 30.7 2.1 10 191 13.0 O.3d !. q 

10 3 58 34.0 19-11.b 15S"?2.0 31 .8 ?3 13 lA3 16.1 o.1M 1.2 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT

N LONG

W OfPTH '4AG NO GAP OM!N ERr Et-tH E

MAY 10

5 30 53.2 19-1?8 155- 3.81 q.l 4.1 23 177 1 1 • 1 O.2v 1.9 0

10

b 33 44.4 19-14.4 155- 2.2 2.1 11+ ?28 14.1 1.7 4

10 9 55 19-19.5 155- 7.6 9.1 1.7 12 317 b.v O.6ti j.6 1

10 11 17 37.8 l<i-21.0 155-25.5 11 • 1 1.7 13 129 0.08 0.8 1

10 11 31 Sq.o 19-20.9 155-11.6 b.9 1.4

Q 200 3.3 o.c'J 2.0 1

10 11 33 34.4 19-14.0 155-24.1 17.3 1.5 14 182 1.3 3

10 11 36 30.6 155-?2.Q 33.1 2.2 16 lHl 13.1 1.7 -3

1u 13 10 s.Q 155-26.3 7.7 1.q 14 83 0.5 O.lu O.Q 0

lO 16 22 53.0 19-20.6 155-13.q 15.4 1.2 7 18B 3.3 0.18 O.Q 1

10 11 11 40.3 1\j-21.9 155-23.0 6. 1 1.2

9 169 3.2 1.2 3

10 20 5 41.7 19-1A.7 155-1b.7 Q.7 1.4 lb 16f, 2.9 O.Oh 0.5 0

lu 47 5';.6 155-)H.B 8.l 1 • 1 11 151 0.10 0.7 0

lu 20 50 )(.,.9 19-20.5 155-17.5 10.0 1 • 1 13 90 0.11 0.09 0.7 O

w

0 10 lO 51 19-20.1 155-}7.9 8.7 1.2 14 159 0.9 0.09 0.7 0

10 20 5S 4.5 19-20.6 155-18.8 ij.l 1.3 10 140 2.6 0.11 1.0 0

11 1 15 13.2 l 241 1.H 0.24 1

1 1

2 lH t;7.1 19- 7.9 Y.t) 2.2 13b 8.4 o.o"J 1.0 0

11 b 16 14.6 155-21.01 13.8 1.3

7 258 8.4 0.52 4

11

7 40 19-43.1 156- 1.2 32.2 2." 13 302 31.0 I.Ob 5

11 21 12 155- 1.3 7.4 2.1 i. 191 4.8 1.3 0

12 b 4q 7.7 19-10.6 155- 4.4 3.4 2.h II 268 22.9 O.HU ";.4. 2

12 9 c.4 25.9 19-21.4 155-18.5 Ij 101 3.1 1.2 l

Ie 4H 41.9 155- 1.3 2.0 1b 198 14.2 0.13 1.0 0

13 11 59 10.0 19-24.5 154-46.31 8.0· 2.7 17 319 14.0 l.sq 12.7 

13 14t

2 25.8 19"19.9 155-18.5 26.2 1.7 10 14-4 1.Y o• 1t; 1

13 14 28 5('.1 19-28.5 155"13.91 R.Oo 1.2 8 322 8.6 7.0 

13 14 29 26.4 19-26.1 155-14.71 l.ij 1.0 10 292 4.b 4.'" 14

13 15 II 'i7.1 19-23.5 155-25.3 t.i.4 3.2 17 82 1.0 0.09 0

13 21 ]q.4 155-25.4 7.4 2.7 18 59 7.1 0.09 0.8 0

13 Ib 32 3f,.1 19-18.1 155-11.2 21.6 1.3 11 193 6.b 0.16 1.3 1
SUM"'ARY uF EVEN·TS (CONTINUED)

Hk IlI4N S.EC N LON'G w DrEPTH M.AG NO GAP f'R T 'ERH 

MAY 13 16 42 7.2 .• 9 15'5- 3.5 4.0 ?,.l 10 263 2'0. 7 1.• 3b 

13 19 3f' 37.0 1·9.- A.• 4 71 17,. 2 1 .• Q 12 l·b,.4 (J .• i 1. 

13 20 4 2SJ.4 14·-25,.5 1'55-22.'1 10.5 3 «1 171 5.'.:\ O.2tJ 0.5 

13 21 3A lQ.O 19-15.8 9.1 2.8 1.7 8 1.... 7 1.02 1.9 

13 2.2 9 17.1 1Q"11 .• 1 1-5-5·-35·.0 A.• 6 I.e b 139 7.0 0.18 1.9 

13 22 .3,; 7.:4 19-21.3 1·5:5.. 15.• 2 11.2 1. 1 7 lSb 0 .• 07 0·.7 

13 23 45 44.7 .• 8 3 .• 3 Q.r; 2.• 3 12 18.• '+ 0.1'+ l.q 

1'+ 0 32 1.2 19-2'4.8 155-.l4. q 2.] If) 74 8 .. 9 0.01 

14 5 1 1 37.7 155- 4.3 2.2 14 11.4 O.l'..J 1.2 

I_ t> 21.0 1 q 1 0 1Q.• b 1.7 12 0 1.6 0.06 u.s 

1- 7 35 31.7 19-24.3 1;5'·5-11.4 1 • 1 "i O.t't 0.3 

1.4 11 21 .4 l·\j-1 7 .6 7.b 3 14 189 19.2 ·1-.3 

11+ 11 14 1'1-2".7 1"5'S-} o. q 10-.2 1.6 In 238 7 .... 0.38 1 • 1 

w lit- 20 10 45.2 19-19.4 155-16.2 1.7 lit- 189 2.- 0.00 0.'; 

15 2 13 14.0 19-28.0 1'1.2* 14 213 b.5 

1:, 2 40 19-20.9 1.8 11 171 ,2.0 0.30 1.5 

2 1'1-21.5 2.0 0.1 2.1 13 2u • .J 0.5u 1 • 1 

3 38 23.0 19-19.6 155-15.'l 9.7 1.7 12 2.8 o. 0.8 

lb It 34 47.9 19-23.6 1.5 0.5 6 i67 2.8 0.1" 0.9 

15 4 40 ll.b 19-23.1 155-13.3 f.) 299 4.3 1.2 

IS 4 40 SI;.9 19·21.7 1 • 1 6 ??O 1.4 1 • 1. 1 4.5 

15 4 41 17.1 19-2:i.l 0.3 1.'5 11 146 1. , 0.11 0.8 

41 4h.5 6.t'. 103 156 2.3 o.u ti 

15 4t ... 26.5 1'J-23.4 lS5-15.1 2.3 1.b 11 16U 2..4 

15 4 43 1.3.6 155-14.8 6.6 2.1 q 114 Z.4 0.07 0.1 

15 4 44 42.8 19-22.4- 155-14.4 2.2 6 133 2.b 0.30 2.1 

4 45 22.9 155-14.6 6.ti ?2 6 139 2.1t- 0.32 2.4 

15 4 48 2A.A 19"23.5 155-14.q 3.0 1.3 b Ifl6 2.f. 0.06 0.6- 

15 it 48 19-24.5 5.f4 2.4 2.1 333 IM.I 0.38 1.9 

15 ,. '+9 3,;.3 19-23.1 155.. 13.8 1.2 1.9 5 174 0.0 
OF SEISMIC l:VENTS (CONTINUED)

1970 HH MN SEC LAT N LONG W DEPTH MAG GAP DMIN ERT ERH E

MAY 4 51 43.1 19-23.1 lSS-14.Q b.4- 1.1 12 153 2.2 0.6 0

15 4 52 11.8 19-23.5 155-}4.4 6.9 2.0 5 3.3 0.0 

15 4 52 28.2 19-23.8 155-14.3 6.H 1.A 7 190 3.b 0.12 0.8 0

I!; 4 53 12.3 b.7 2.2 15 2.3 0.0'5 0.5 0

15 4 54 43.6 1.9 4 277 10.3 0.0 

15 4- 55 20.3 19-23.1 155-14.6 6.7 1.4 8 ?72 2.6 0.42 2.4 1

4 55 46.1 155-14.8 h.4- 2.2 8 100 0.07 0.8 0

IS 4 56 1':i-23.4 6.5 2.7 11 103 0.01 0.8 0

15 5 0 23.9 1'1"22.1 155-13.9 6.9 2.0 5 }07 2.5 0.0 

15 0 3b.1 155-14.1 7.u 2.5 b 121 2.'-J 0.10 1 • 1 

15 1 12.6 19-24.4 155-14.1 6.3 2.2 5 ?O3 4.i. 0.0 

5 2 24.2 19-23.3 155-14.2 b.d 2.2 6 108 3 • .3 0.11 l.l 0

5 4 46.5 19-23.0 155-14.9 6.8 2.6 8 lib 2.1 0.12 1. 1 0

w

N 15 5 8 34.0 lC1-23.1 155-15.0 6.1 2.5 9 114 1.9 0.10 1.0 0

5 12 9.1 19-23.6 3.1 1 179 j.O 0.03 0.2 0

5 12 19-23.2 155-14.1j 2.7 16 112 O.s 0

5 14 5.8 19-23.3 155-15.0 6.1 2.5 1- Hit- 2.3 0.01 0

5 17 1.8 19-23.6 6.2 7 184 1.3 O

15 5 11 -1.3 19-23.3 155-14.9 5.7 2.1 15 108 2.4 0.06 O.s 0

15 5 19 30.6 19-23.5 2.2 9 103 3.0 0.07 0.8 0

15 5 20 ?q.o 19-23.3 15S--14.9 6.3 2.1 9 At> 2.5 O.Oq 0.8 0

15 22 20.0 19-23.1 155-14.1 n.] 2.5 q5 0.6 015 5 23 35.4 19-23.1 155-14.1 1.9 7 1St> 0.2:) u.S l

15 5 l4 23.3 19-23.2 155-14.4 6.7 2.4 9 163 2.'J 0.14- 0.9 0

15 5 25 26.9 155-14.8 6.3 2.2 11 160 2.5 0.13 0.8 0

15 5 27 35.2 19-23.2 155-15.0 6.6 2.2 14 8S 2.1 O.Ob 0.5 0

5 28 SC;.4 155-14.6 2.5 1.3 9 167 2.9 0.07 0.4 0

15 5 29 13.4 19-23.8 155-14.2 6.5 1.8 11 lAl J.ti 0.09 0.6 015 5 29 515.3 19-23.4 155-14.4 6.5 1.8 10 112 3.1 \).11t 0.9 015 5 33 48.4 19-23.1 155-14.4 4.2 IbA 2.H 0.0 
SUMMAkY OF SEISMIC EVENTS (CONTINUED)

1910 HR SEC LAT N LONG w DEPTH MAG GAP OMI ERT ERH 

MAY 34 9.7 19-23.2 155-13.1 5.2 1.4 Q 171 O.2b 

15 34 15S-14.Q 2.9 1.6 9 169 2.7 0.07 0.4 

35 33.9 19-2"3.2 155-14.9 2.1 10 90 2.3 0.07 0.1 

5 38 2?8 19-23.1 2.0 1.2 9 161 2.9 0.15 0.9 

15 5 38 47.5 19-22.7 155-14.2 6.2 1.5 11 141 2.5 0.13 0.9 

IS 5 '+0 40.6 19-22.4 155-14.8 ".0 l.b 10 125 1 • .3 0.04 0.4 

15 41 11.6 1'1-23.4 155-14.4 b.4 1.8 10 168 J.2 0.11 0.11 

5 q.2 6.4- 2.1 2.3 0.5 

5 43 33.9 15S-14.t 2.1 b 170 3.1 O.2i! 0.4 

15 43 51.0 155-14.6 6.5 2.2 14 q2 0.6 

15 5 44 2R.7 19-13.5 155-17.4 3.2* 2.0 9 319 15.7 O.bO 

15 5 46.7 1':1-23.4 155-14.8 3.3 1.6 'l t!.7 0.11 0.6 

:; q.Ci 51.4 155-14.5 3.1 1.4 10 If\7 3.1 o.Of, n.s 

w

w 5 'f.6 0.1 19-22.8 6.1 2.1 12 113 2.l u.7 

5 '+6 43.9 19-23.4 155-14.7 2.8 1.3 8 167 0.32 0.6 

15 5 47 31.8 19-23.2 155-15.5 2.1 1.4- 8 144 1.7 o.s 

5 411 21.3 1.0 1.9 9 161 l.o 0.4 

1:' 5 4q lA.l 19-23.1 155-14.91 10.0 1.5 9 155 2.3 0.51 2.5 

50 2.'1 155-14.f:' 6.2 1.7 10 138 1 • '1 0.16 1.2 

15 5 51 18.4 155-14..5 6.6 1.7 10 163 l.9 0.10 1.0 

)5 5 51 57.9 155-14.71 7.2 1.5 12 13q i • 1 0.40 1.8 

15 S 20.3 155-14.8 3.0 7 171 2.8 0.07 0.4 

5 S2 41.5 19-22.8 b.O l.q 11 2.l. 0.14 1.0 

15 5 53 27.5 1<.)-21.0 155-15.7 2.b 1.9 9 IP9 1.5 0.14 0.8 

15 54 30.3 19-23.2 155-14.8 b.1 1.7 11 151 O.IU 0.7 

15 5 S5 11 .1 19-21.8 155-14.5 4.2 2.1 12 159 1.4- 0.06 0.5 

5 57.q 19-22.6 155-14." 4.4 3.l 128 2.1 O.Oti 0.7 

5 58 1.5 19-22.8 155-14.8 2.4 l.b 9 143 2.0 0.17 0.5 

l!) b 0 42.3 19-22.5 155-14.0 1.6 11 141+- 2.5 0.2b 1.7 

15 b 2 16.4 19-23.4 155-14.4 6.5 1.5 10 171 3.1 0.14 0.9 
OF SFISMIC EVENTS (CONTINUED)

1970 HR SEC LAT N LONG W DEPTH vAG NO GAP DMII'f ERT EHH E

MAY 15 6 2 23.1 19-22.8 155-14.8 7.1 2.2 12 lOy 2.0 0.10 O.A 0

15 6 3 4.0 19-22.2 155-14.8 S.q 1.6 9 149 1 • 1 a.R 0

15 6 3 35.2 19-22.6 155-15.2 ..... 7 1.9 9 130 1.3 0.10 u.8 0

15 b b· !Ci-23.0 155-15.4 3.3 1.2 8 215 1.4 0.2" 1.2 1

15 6 7 9.7 19-22.9 155-14.8 !'.2 2.3 8 148 2.2 0.21 1 • 1 215 6 C) 13.0 19-23.2 155-14.6 3.4 1.5 10 160 2.1 0.07 0.4 115 b 4 57.0 1.7 10 Ib8 2.9 0.1 0

6 12 5?6 19-23.1 l.5 1.7 8 160 2.8 0.11 

6 IS 14.1 155-19.1 lO.S 2.14- 8 323 11.8 0.1+6 .J.2 6

15 6 15 2i?7 19-26.4 155- 5 .1 8.0 0 7 174 19.1 0.05 1.3 

15 6 16 2c;.1 1';-23.0 155-14.7 b.4 2.2 15 101 2.3 O.uo 0

6 19 19-23.5 1,.6 1.5 11 164 2.8 O.U'i 0.6 0

1:, 6 20 11.7 19-22.9 155-14.8 4.2 1 • 1 8 14b 2.1 O.2b 0.'1 2

w

+:-- 6 20 41.0 19-23.0 155-14.A b.2 ?4 16 l.2 0.00 0.5 0 

15 6 l2 21;.0 19-23.1+ 155-15.3 2.1 7 Z.o 0.0:) 0.1 0

15 6 25 14.0 19-22.5 155- 8.,,? 8 335 11.9 0.41 5.u 4

6 32 R.S 19-22.5 f). 1 1.8 10 143 2.4 O.ld 1 • 1 O

15 6 34 14.0 19-23.2 155-14.5 3.7 1.2 7 261 1.5 215 6 36 44.9 19-23.9 155-13.8 6.3 1.4 9 282 0.47 l.5 0

15 6 37 24.2 19-23.4 155-14.9 6.4 1.'3 11 161 2.5 0.12 o.q 0

15 6 37 44.0 19-23.2 155-14.1 1.5 11 158 0.10 0.7 0

15 h 2A.9 19-23.5 155-15.6 6.0 1.2 10 150 0.01 0.5 0

15 6 40 3q.7 19-23.1 155-14.b 4.7 1.8 12 154 2.3 0.07 U.S 0

15 b 41 n.9 19-22.9 155-14.9 f,.1f. 2.1 13 2.0 0.09 0.6 0

15 6 "2 20.1 19-23.4 155-14.1 3.0 1.1 8 16b 2.8 0.05 0.4 0

b 42 49.4 19-23.1 155-14.6 3.4 1.5 10 159 2.6 0.3 0

IS b 43 31.2 19-23.1 155-15.3 4.2 1.2 7 226 1.7 0.41 1.5 2

6 43.6 155-14.8 3.8 1.3 9 162 2.6 0.12 0.5 1

15 6 46 59.2 19-23.5 155-14.8 0.0· 1.0 9 169 2.8 0.09 0.4 

15 6 48 23.5 19-22.2 155-14.5 4.4 5 162 1.6 0.0 

t'
SuMfitAwY uf SEISMIC EVENTS (CONTINUEU)

1970 HH MN SEC LAT LONG w LJEPTH MAG NO G.AP ERr ERH 

15 6 4q 3?6 19-23.3 155-15.3 3.0 1.1 9 154 2.1 0.04 0.3 

15 b 51 3A.4 19-23.2 155-14.41 4.4 0.7 7 3.u 0.4d 0.9 

6 52 15.4 19-23.1 155-)4.2 2.8 3.0 13 109 3.1 0.07 0.5 

Ib b =;5 29.3 19-24.3 15S- 7.9 23.1 2.1 10 328 8.6 0.80 1.8 

15 6 56 20.4 19-22.1 155-14.5 1 • 1 1.2 fl 145 2.3 0.12 0.4 

15 6 59 15.1 155-14.0 0.2- ] .5 8 143 2.3 0.10 0.6 

7 0 21.9 19-23.2 155-15.21 4.3 1.3 7 151 1.9 1.2 

15 7 5 12.2 19-23.] 155-14.3 3.8 9 0.17 0.4 

15 7 7 21,.1 155-14.4 0.1- 1.0 10 Ibl 2.9 0.01 0.4 

15 7 1 44.0 A.O· 7 323 10.1 1.14 4.A 

15 1 15.5 19-23.7 155-11.5 8.0- 1.5 b 319 O.4i 2.0 

7 21 Q.2 19-23.0 155-14.7 b.1t- 2.2 13 99 0.0t> 0.6 

7 '+3 31.4 19-23.2 3.3 1.i4- 9 14b 1.7 U.5 

w

V1 15 1 43 59.5 155-1 .... n 3.6 1.2 8 255 2 • ;'1 0.33 1.3 

7 45 a.;.2 19-23.5 155-14.b 0.2· 1.3 10 16& 3.0 O.U(o) 0.4 

7 41 17.4 155-13.5 (l.6 ?o 8 10.3 0.50 l.O 

7 Sf, 1.9 19-22.5 155-12.2 11.3 1.8 8 311 5.7 0.39 t..7 

7 56 1. as 1.3 9 lSI 1.9 O. l)Q 0.3 

15 1 57 19-23.1 155-14.81 1.H 1.7 11 155 2.3 1.3 

15 8 8 5A.2 19-22.9 155-14.4 (J.l· I • 1 9 15- 2.6 0.08 0.4 

d 10 34.4 19-23.b 155-14.5 3.2 1.2 E' 261 3.2 0.3. 1.5 

15 8 12 24.6 19-22.0 l55-15.1 1.6 10 126 0.4 0.00 0.5 

15 8 26 50.2 19-22.9 155-14.4 4.5 1.3 11 153 2.5 O. (".9 

28 51 .9 19-23.7 155-14.3 4.1 0.7 7 212 3.7 O.lZ 0.4 

is 8 31 33.1 155-14.6 0.2* 8 149 2.1 O.Of 0.4 

15 8 38 35.7 19-22.9 155-14.6 2.7 0.9 8 159 2.4 0.06 0.4 

15 6 41 38.3 19-22.6 155-14.2 2.3 1.4 11 142 2.4 0.4 

q 3 24.0 19-23.5 155-14.3 J.8 1 210 3.4 0.50 1.9 

15 9 35 "'3.5 19-22.1 155-15.0 7.4 1.6 9 157 1.7 0.16 2.1 

15 9 42 A.6 19-25.2 155- 8.7 8.0· 1.8 b 332 13.2 11.8 
SUMMAHY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

MAY 15 9 43 3q.9 155-10.0 7 326 11.0 1.80 1.4 

30.7 19-24.8 155- 9.5 t(.O* 1.7 7 321 1.37 

9 '+7 27.0 1'J-23.9 3.0 0.6 8 213 4.2 0.27 1 • 1 0

10 4 21.8 19-23.3 4.1 1.0 11 150 ! .9 0.13 0.6 1

15 10 20 57.6 19-21.8 155-15.3 3.0 1 .1 11 162 0.1 0.07 0.5 0

15 10 33 9.9 19-24.9 155- Q.8 B.O· 1.6 7 326 11.2 1.44 

15 10 45 1.3 19-22.4 155-11+.2 2.7 12 2.3 0.07 0.5 0

11 0 19-2?7 155-14.5 6.5 1 • 0 13 144 2.2 0.09 0.6 0

15 11 If. 26.5 19-19.2 155-13.6 10.1 3.8 19 170 5.7 0.11 U.9 0

11 8 3.1 19-1q.4 155-13.2 13.8 1.5 8 223 0.31 1.3 2

15 11 9 21.2 155-13.b q.2 15 115 6.9 0.12 0.9 O

11 12 57.6 19-18.5 155-12.1 15.1 1.3 7 242 7.6 0.14 1.4 0

11 13 4'i.4 155-13.8 10.0 l.l 17 16A 4-.7 O.Ob 0.6 0

w

(j\ 11 15 42.2 19-1Q.b 155-1.03.9 11.1 1 • 1 13 209 4-.7 0.08 0.7 0

15 11 16 4.5 155-10.5 A.Oo 1.5 1 324 1U.2 0.96 0..0 

15 1 1 16 155-14.7 1.0 3.u 0

IS 11 11 }Q.4 19-17.7 155-12.6 14.5 1.7 9 d.B 0.12 1.2 0

15 11 19 3.4 19-18.1 155-12.9 14.6 1.5 9 245 8.0 0.2'; 1.3 ·'15 11 q.l lSS-12.1 13.8 1.5 10 9.2 0.22 1 .1 

15 11 22 58.6 19-19.4- 155-13.9 9.7 1.2 13 203 5.1 0.13 0.9 0

15 1 1 23 44.3 19-19.5 15S-13.Q lu.l 1.5 12 200 '" Q .' 0.9 0

15 1 1 26 41.5 lQ-17.1 155-12.2 16.3 1.U b ?56 d.4 0.35 2.6 2

15 11 21 31.8 19-1A.5 155-12.6 15.1 1.5 b 244 7.6 0.14- 1.2 

11 30 18.1 19-1A.2 155-13.1 1.J.5 1.5 10 243 7 .7 0.20 0.9 

l:i 11 J7 56.6 1'l-18.5 155-13.1 13.1 1.3 10 239 7.3 0.21&. 1.2 

15 11 38 54.1 19-17.5 13.8 1.4 8 2'53 9.2 0.tt4 1.9 3

11 40 2?9 19-23.4 155-14.1 O.M 0.7 6 3.b 0.08 0.3 2

15 12 3 42.6 1'l-24.7 155-23.7 12.5 1.1 13 133 7.3 0.06 0.6 

15 12 6 34.5 155-12.8 15.5 1.6 9 23d 1.2 0.08 U.S 

12 11 4".8 155-13.3 14.1 1.3 6 228 6.2 0.0" 0.6 

'. t
SUMMARY OF SEISMIC EVENTS (CONTINUED>

1970 tiR MN SEC LAT N LONG WI DEPTH MAG NO GAP DMIN ERT ERH 

MAY 15 12 12 34.7 19-25.3 155- Q·.3 A.O* 1.5 7 329 12.3 2.00 7.q 

15 12 17 13.7 155-13.1 15.2 1.3 7 233 0."7 0.06 0.5 

15 2q 1·7.9 19-23.4 2.5 0.1 10 158 2.4- 0.04 0.2 

Ib 12 46 33.6 19-26.3 4.81 d.O· 1.5 7 339 20.2 3.98 14.8 

15 13 7 19.6 19-18.7 155-13.2 14.6 1.3 7 234 6.8 0.13 0.6 

15 13 23 16.6 19-23.2 6.3 1.3 12 150 1. Q O.fJ 

15 13 32 51.9 l'i-11.9 155-13.0 13.8 1.2 9 247 8.t! 0.30 1._ 

15 13 33 lq.7 19-25.0 9.1 8.0· 1.5 7 327 Il.S 1.I+J 5.A 

15 13 4A 56.8 19-24.3 155-10.91 1.3 d 320 9.0 0.31 4.3 

15 14 0 Sl\.O 19-23.1 lS5-14.2 3.1 1.0 10 162 3.\) 0.04 0.3 

15 14 A 3.6 19-23.1 155-14.9 ,>.l- 1.6 14 151 i.I 0.07 0.5 

15 14 8 19-23.7 155-14.5 2."J 8 IS5 3.4+ 0.00 0.3 

14 11 19-27.6 155- 1 • 1 A.Oo 1.7 7 344 21.1 0.79 3.8 

w 13 3q.l 19-23.1 155-14.9 6.1 1.9 1-- 91 2.1 0.05 0.5 

.........

15 14 lA 47.3 19-27.0 15:>-13.21 8.0· 1.4 6 d.1 J4.3 

15 14 22 19-24.5 155-15.4 4.1 O.H 6 2.t.i 0.12 u.s 

15 14 47.2 155-14.5 5.7 1.3 12 13b O.ld 0.7 

15 14 45 43.0 19-17.4 155-12.5 14.1 l.d 8 2Sb 9.2 0.17 !.4 

15 8 44.9 19-25.0 155- 9.1 8.0· 1.3 6 329 11.5 1.14 It.b 

15 .34 44.9 19-24.2 155-15.1 2.6 0.7 9 171 2.4 0.07 0.5 

15 15 j7 13.7 19-16.1 1SS-12.H 1." 7 287 0.8j 1+.7 

15 15 39 54.8 19-24.0 3.1" 0.8 8 20lf. 4.:; 0.06 0.3 

43 24.4 19-23.3 155-14.81 2.2 0.7 10 161 2.0 0.06 0.,+ 

15 15 43 53.9 155-12.31 a.o" 1.3 10 310 6.7 O.2J 3.6 

15 15 48 32.R 19-23.1 155-14.3 3.0 0.9 6 172 3.0 0.4 

15 15 48 49.8 19-24.8 155-11.2? 8.0· 1.4 5 322 9.U 9.&1 Jb.6 

15 16 5 40.4 l'i-22.7 155-14.9 b.2 2.0 16 98 1.t3 0.06 0.5 

15 16 28 59.7 19-14.4 155-33.1 7.9 2.4 10 124- 6.0 O.Ori 0.9 

15 Ib 50 13.6 155-14.5 3.9 0.8 8 181 3.3 0.05 0.3 

15 16 7 34.8 19-23.9 155-10.7 13.0" 1.3 6 325 9.0 O.4r4 2.1 
SUMMAHY OF SEI5MIC EVENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG OE:.PTH MAG NO GAP UMIN ERT E

MAY 18 15 19-19.9 155-14.1 10.6 1.2 14 192 4.1 a.Qd 0.7 0

is ld 1+0 2.1 19-21.6 155- 3.2 0.6 2.4 15 188 Ib.4 O.bl 1.2 2

15 18 .. 1 47.1 19-30.2 155- 9.q 8.0· 7 336 15.8 1,j.9 

15 18 -8 53.6 19-23.1 155-14.2 2.8 0.9 7 171 3.1 a.or; 0.4 0

15 J9 3 '5.6 19-24.1 155-15.3 4.8 0.9 I) 243 2.9 0.23 0.7 1

15 19 31 28.5 1(j-23.9 155-16.2 4.2 1.1+ 11 150 1.5 0.13 1

15 20 () 13.3 19-23.4 lSS-lS.O? 0.3- 0.7 11 1"0 2.4 0.u7 0.4- 

15 1 7.3 19-2?9 15'5-14.6 r.b 7 159 2.tt- O.vl 0.4 0

15 20 13 2.7 155-13.1 14.9 1.4 9 6.ti 0.1.,3 0.9 1

15 20 Jl 28.1 19-24.7 155-15.0 4.1 0.8 7 2Ib 3.5 0.08 0.3 0

15 21 9 20.3 19-27.2 155-26.4 1.Q 2.2 15 76 7.3 0.08 0.7 

15 21 lH 19.& 19-23.4 155-14.6 3.2 0.7 9 165 2..9 0.06 U.4 1

21 3'; 12.8 19-23.5 155-1'5.0 3.3 0.9 9 167 2.6 0.06 0.4- O

w

00 15 II 3H 44.6 155-15.9 3.1 0.7 8 215 1 • 1 0

22 iii 41:).9 19-23.2 155-15.3 3.3 0.8 7 141 0.06 0.7 1

15 29 10.1 19-23.9 155-15.5 4.5 0.8 b 230 2.'+ u.OQ \).3 0

IS 23 34 5A.6 19-24.7 155-16.0 5.3 q 1 • I 0.26 1 • 1 1

15 23 39 21.2 19-24.1 155-16.2 0.1 0.9 153 1.6 0.19 O.b 9

15 23 40 15.8 19-23.8 155-15.0 0.5 7 179 3.0 0.13 O.lt 

15 t!3 41 1.5 19-25.3 4.3 2.0 7 0.9 0.2Q 1.4 2

15 19-23.q 155-15.3 1.0 H 161 3.0 0.10 0.6 

23 53 46.5 19-23.3 155-15.0 n .1 1.9 9 A4- 2.3 O.OQ O.S 0

15 23 ';)7 13.8 19-24.3 155-16.0 2.4 0.3 8 172 2.0 0.13 O.A 0

15 23 59 4Q.3 19-23.6 155-14.3 4.6 3.6 15 98 3.5 O.Ott 0.6 O16 0 3 3Q.3 19-23.ti 155-14.3 0.1· 1.5 7 189 3.7 0.08 <1.4 

16 0 4 IS.R 19-23.8 155-15.5 2.1 0.4 9 164 2.4- 0.5 1

Ib 0 9 1.3 19-23.3 15S-15.Q 4.4 1.4 11 131 1.6 0.09 0.7 0

lb 0 13 4t'J.9 19-24.1 155-16.8 2.3 0.3 7 122 1.3 0.14 0.4 0

10 0 14 34.4 19-24.0 155"15.5 2.5 0.5 9 170 2.5 0.03 0.2 0

16 0 14 59.1 19-23.7 155-15.1 5.0 2.2 12 82 2.0 0.01 0.6 0
SUMMAkY OF SEISMIC EVENTS

1970 HR MN SEC LAT LON·G- W DEPTH MAG NO GAP DMIN ER·T ER."" 

MAY 16 0 16 51.4 19-22.3 155-15.6 5.5 10 113 0.6 0.01 0.6 

16 0 20 44.3 19-24.5 155-16.0 1.2 1.2 9 170 1.9 0.06 0.2 

16 0 21 17.3 19"23.9 155-}6.2 0.1 0 1.2 8 145 1.3 0.06 0.4 

lb 0 Z2 32.5 19-23.3 155-14.3 1.9 8 Ib8 3.2 0.10 0.6 

16

0 23 18.4 19--·24.8 155.-15.1 4.9 2 •• 12 Il!) 2.3 0.09 0.7 

16 0 26 41.1 19-24.5 155--14.5 3.6 0.9 10 204 4 •• 0.16 1.0 

16 0 27 lc;.7 19-24.3 155... 15.6 4.2 1 • 1 6 240 2.7 O.b 

16 0 28 f\.2 19-2_.4 2.2 1. 1 9 147 1. 1 O.u\.J 0.5 

16 0 30 31.5 19-23.4 15S-16.3? 1.8 11 82 l.u O.1j 0.7 

16 0 32· 8.9 19-23.9 155-15.6 3.1 2.0 11 165 2.3 0.10 0.7 

16 0 32 56.5 19-23.9 15.5-15.Q 2.2 8 158 1.7 0.26 0.7 

1b 0 33 37.9 19-23.4 3.1 6 156 2.8 0.22 1.5 

16 0 34 18.2 19-24.3 155-15·.5 0.3* 1 • 1 8 192 2.M O.Of\ 0.3 

v.> 16 0 36 1.2 19-20.9 155- 8.31 8.0'" 2.9 13· 25·1 3.4 1.05 

\0

16 0 38 1"l·-23. 0 155-14.1 0 •. 2 0 -0.3 7 169 3.0 O.Ob 0.4 

16 0 3Q SC;.3 19-22.4 155-16.11 3 •. 0 0.9 8 124 0.4- O.IJ 0.8 16 0 41 37." 19-23.5 155-15.7 4.5 2.0 12 14.7 1.9 0 •. 11 0.8 

16 0 45 13.2 19-23.9 155-15.51 0.9 1.6 11 165 O.lt. 0.8 

16 0 48 44.7 19-24.3 155-15.4 2.3 0.8 7 194 3.0 0.06 0.5 

16 0 SO 31.1 19-25.0 155-15.7 0 •. 2· 1.0 8 2.2 O.ltt 0.8 

10 0 5? 2?8 19-28.8 155-13.4? A.O· 1.5 6 3·25 9.b 1.30 li.4 

16 0 S4 7.9 19·-24. 7 15·5-15.6 .. • '7 2.2 11 202 2.6 0.16 1.0 

16 0 57 lO.q 19-23 •. 9 155-16.4 .... 1 0.9 9 182 1. 1 O.2h 1.0 16 1 6 3'5.3 19-15.0 155-15.41 R.O· 1.5 6 298 12.6 1.28 17.4 

16 1 8 21.2 19-23.8 155-15.1 3.4 6 247 3.0 0.23 1.0 

16 1 9 25.7 19-23.2 155-14.6 2 •. 7 1. 1 7 170 .2.7 0.08 0.6 

1(:) 1 22 29.1 19-21.9 155-16.9 6 256 2.0 0.29 3.8 

16 1 22 49.tS 19-23.3 155-15.2 2.1 9 154 2.1 0.19 0.5 16 1 25 51.5 19-23.5 155-14.9 2.2 8 165 2.7 0.09 0.6 

16 1 2b 9.1 19-23.5 155-14.7 2.9 8 2.9 0.04 0.3 
SUMMARY uF SEISMIC EVENTS (CONTINUEO)

1970 rtR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

MAY 16 1 29 26.0 19-23.9 155-15.9 6.4 1.3 7 209 1.8 1.49 4.0 7

16 1 31 17.8 19-20.1 155-15.3 8.9 2.1 16 160 J.l 0.11 1.0 0

lb 1 36 45.2 19-24.3 7.5 a.o· 1.8 5 337 14.5 3.20 Sll.7 

16 1 46 20.6 19-22.8 155-14.61 3.4 1.4 8 147 2.3 0.21 0.6 2

16 1 Sa 3.1 19"23.4 155-15.3 3.9 0.8 9 153 2.6 0.08 0.4 0

16 2 1 33.8 19-24.2 155-16.7 0.1· 1.6 11 130 1.4 0.02 0.1 

16 2 7 39.J 19-23.- 155-14.9 3.2 0.8 9 163 2.6 0.07 0.5 1

ib 2 9 37.6 19-23.3 155-16.0 8.0· 1.2 5 1.4 0.06 2.3 

16 2 22 20.3 19-21.4- 155-13.61 8.0· 1.9 8 314 7.6 0.40 

ib 2 25 47.5 19-26.1 155-13.4 8.0· 1.2 5 322 b.8 0.8" 4.2 

16 2 26 3A.6 19-26.2 155-16.1 5.8 2.4 15 103 2.8 0.0·7 0.6 0

16 2 29 0.3 19-23.9 155-16.1 3.4 0.5 7 200 1.5 0.21 1.0 1

16 2 31 23.1 19-22.7 155-14.1 2.3 9 150 O.OJ 0.3 0

0 It» 2 40 54.1 19-21.7 155-14.7 5.1 1.2 7 172 1. 1 0.12 0.6 o

Ie, 3 9 10.1 19-23.4 155-14.8 2.2 0.5 10 163 2.1 0.07 0.4 0

16 3 12 -0.1 19-23.6 155-14.0 3.1 0.9 7 201 3.3 0.01 0.4 1

16 3 15 36.3 155-15.2 b.l 1.4 11 122 1. 1 0.06 0.5 0

Ib 3 18 48.1 19-24.3 155-15.8 4.2 1.1 6 228 2.3 0.03 0.1 0

16 3 19 19.9 19-23.3 155-14.9 6.8 2.1 15 8b 2.4 0.07 0.6 016 3 40 30.9 19-24.4- 155-15.9 3.5 6 232 2.1 0.10 0.4 o

16 3 41 21.1 19-24.5 155-15.2 3.5 6 258 0.41 1.6 1

lb 3 46 1.0 19-24.2 155-15.4 &.0 0 S 242 2.9 0.33 4.2 

16 4 4 49.8 19-27.1 155-13.5 8.0· 6 318 7.4 1.14 5.3 

16 4 14 43.2 19-24.5 155-15.5 8.0* S 251 2.8 0.24 2.6 

16 4 16 36.6 19-26.7 155-11.7 8.0· 6 324- 9.8 1.75 1.5 

16 4 22 32.4 19-24.1 155-15.6 2.8 0.3 7 226 2.4 0.17 0.9 1

16 4 24 24.4 19-23.5 155-16.4 4.5 0.5 8 174- 0.8 0.43 1.3 2

16 '" 34 22.4 19-23.6 155-15.6 4.1 0.7 5 230 2.2 0.0 

16 5 6 6.9 19-26.1 155-23.6 8.4 1.9 14 156 5.8 0.1! 0.8 0

16 5 29 53.1 19-24.0 155-15.5 3.3 0." 7 22& 2.5 0.28 1.5 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH 

MAY 16 5 "'2 19-2J.q 155-16.3 3.1 0.5 7 190 1 • 3 O.A 

It, 5 59 12.1 19-2,..1 155-16.7 2.7 0.5 7 167 1.2 0.3- 0.8 

16 & 3q 46.4 19-25.A 155-16.1 4.6 1.0 9 201 2.2 0.5 

16 6 58 17.1 19-23.8 155-16.1 3.3 0.8 11 123 0.-' a.OM 0.4 

16 7 0 51.0 19-19.9 155- 8.2 12.0 1.9 14- 213 4.6 0.14 1.2 

16 1 11 21.2 19-23.8 1.4 8 136 1.0 0.11 0.7 

16 7 22 56.0 19-24.3 155-15.7 3.8 1.2 6 234 2.5 0.02 0.1 

10 7 35 33.6 19-24.9 I5S-IS.3 4.6 1.0 6 212 3.0 0.42 1.4 

16 7 12.5 19-24.4 155-1".1 6.2 1.0 11 176 1.9 0.11 0.7 

16 8 6 50.1 19-23.9 155-15.5 3.1 1.0 9 169 2.5 0.07 0.4 

Ie 8 B Q.6 19-23.1 155-13.9 1.6 8 167 2.7 0.3 

lb d 30 20.3 19-22.9 155-14.4 2.2 0.1 7 161 2.5 0.16 0.4 

10 8 37 25.1 19-23.6 155-14.6 3.0 0.8 8 180 3.2 0.06 0.3 

J:' 16 a 42 46.9 19-23.1 155-14.9 6.0 1.3 13 153 2.2 0.07 0.5 

lb 53 20.8 19-24.4 155-1b.3 3.2 0.9 1 215 1.5 0.05 0.2 

16 Iv 8 19.8 19-19.3 155- 7.9 9.t? 1.8 8 220 6.0 O.Of 0.6 

16 10 14 33.0 19-15.5 6.8 2.3 13 199 10.5 O.lb 1.2 

16 11 25 19-23.0 155-15.0 5.1 1 • 1 11 145 1.8 0.7 

16 11 40 2?9 19-17.8 155-13.0 14.9 1.4 8 248 8.3 O.2b 1.3 

16 11 4Q 40·.9 19-24.1 155-15.9 6.1 0.9 10 169 2.1 0.32 0.9 

16 12 29 0.3 19"22.'+ 8.5 1.2 8 294- 3.1 1.20 3.3 16 12 30 4 19-23.0 155-14.7 2.3 0.6 8 162 2.4 0.14 0.5 

10 12 36 30.8 19-27.2 155-11.7 8.0 0 7 327 1.10 4.6 

J.O 13 0 21.7 19-19.6 155-27.4 8.8 2.0 13 156 1.2 0.1't- 1.2 

16 13 7 4.4 19-19.8 155-16.9 9.1 1.2 8 235 1.0 0.80 1.6 

16 13 11 47.9 19-19.5 155-27.6 6.5 1.8 9 156 15.8 0.12 1.4 

16 13 59 32.6 19-24.2 155-15.7 3.3 0.5 7 244 2.5 0.25 1.4 

16 14 5 57.0 19-24.3 155-15.1 3.3 0.8 7 179 2.5 0.22 1.4- 

16 14 19 15.4 19-23.3 155-14.2 0.3· 8 169 3.3 0.04 0.3 

Ib 14 26 31.3 19-23.4 155-17.3 1.9 0.6 7 96 0.8 0.4 
SUMMARY Of EVENTS (CONTINUEO)

1970 HR t-1N SEC LAT N LONG W DEPTH MAC; NO GAP DMIN ERr ERH E

MAY 16 14 50 9.8 19- q.5 155-23.7 1.0 1.0 10 231 19.8 3.0 1

1& 15 11 215.9 19-24.1 155-15.9 2.5 0.3 7 233 l.i O.lb 1.2 1

16 15 25 58.1 19-23.5 155-14.7 3.0 1.3 8 174 3.0 0.07 0.4 0

16 15 31 51.8 19-23.6 155-14.3 11.9 1.1 9 177 3.6 0.23 1.2 116 15 53 23.9 19-24.0 155-16.2 3.3 0.1 8 202 1.6 0.12 0.8 0

"16 17 IS 26.1 19-25.7 155-10.0 8.0· 1.6 7 329 11.8 1.3" 5.3 

Ib 18 3 42.1 19-19.2 155-15.0 8.3 1.9 IS 197 4.5 0.16 1.0 0

16 18 45 51.7 19-25.7 155-16.1 0.1 0.4 7 28.9 2.1 0.13 2.1 1316 19 2 55.9 l'i-24.2 3.1 0.6 8 l.b o.s 0

16 19 11 38.2 19-27.0 155-14.5 3.9 1.3 8 307 5.8 0.16 3.7 

16 19 39 14.3 19-22.8 155-14.6 6.9 2.6 15 110 2.2 0.05 0.5 0

16 20 12 50.3 19-13.5 155-23.3 27.5 2.1 175 12.4 0.31 1.5 4

16 21 16.2 19-24.6 155-15.0 5.5 1.1 6 266 3.6 0.43 1.3 1

N 16 21 10 32.7 19-23.5 155-15.8 2.9 0.7 7 201 1.1 0.26 1.3 1

16 22 25 42.7 19-23.7 155-16.7 3.4 0.2 10 119 0.5 0.11 0.6 1

16 23 23 27.1 1'J-24.2 3.0 0.5 8 226 2.- 0.21 1.0 1

16 23 24 12·.1 19-24.1 155-11.5 8.0· 1.4 b 7.9 0.46 2.2 

16 23 26 10.5 19-24.5 155-15.6 3.8 1.0 6 240 0.09 U.4 0

16 23 'to 4. 7 19-24.1f. 155-15.6 3.9 a.A 6 241 2.6 0.7 0

17 0 9 25.4 19-19.9 155-15.2 14.1 1.2 8 203 3.t> 0.07 0.3 0

17 0 its 0.0 19-24.3 155-15.6 3.5 8 188 2.7 0.05 0.3 0

11 1 19 S8.R 19-cS.l 155-12.71 B.O'" 1.2 8 302 7.- 0.30 5.1 

17 1 43 44.5 19-22.1 155-17.5 22.7 1.5 15 79 2.7 0.12 0.7 1

17 2 7 1.0 19-23.6 155-14.7 2.3 8 171 3.0 0.06 0.4 0

17 2 19 24.5 19-23.3 155-14.7 3.9 0.6 10 160 2.f) 0.05 0.3 0

11 2 59 59.1 19-23.6 155-13.8 5.0 1.0 6 287 4.3 0.29 1.0 1

17 J 46 39.9 19-22.6 155-14.1 3.3 0.6 6 152 2.6 0.07 0.7 0

11 4 13 16.1 19-24.4 155-16.4 3.5 0.9 6 204 1.4- 0.06 0.3 0

17 '" 17.6 19-24.4 155"15.4 4.2 0.8 6 24& 2.9 O.ltl 1.4 1

11 '+ 54 49.0 19-24.4- 155-15.9 3.4 0.9 6 230 2.1 0.08 0.3 0
SU"'MAkY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH 

MAY 11 5 18 33.9 19-22.4 155-15.0 1.4 12 125 1.2 0.07 0.5 

17 5 50 57.8 155-15.9 8.2 1.2 10 208 5.2 1.1 

17 6 4 0.1f. 1'J-18.Q 155"12.9 14.7 1.6 8 235 6.8 0.15 2.4- 

11 6 15 49.6 19-23.1 155-13.5 5.9 1.3 6 293 4.8 1.6 

17 6 27 1.1 19-19.5 155-13.6 10.1 0.9 15 194 5.2 0.09 0.7 

11 b 32 32.3 19-19.6 155-14.0 10.7 12 210 4.7 0.13 1.0 

17 7 38 sc;.l 19-24..1 155-16.6 3.2 0.5 6 117 1.3 0.11t O.M 

17 8 3 19-24.3 155-15.6 3.3 0.8 f) 24-1 2.1 0.24- 1.0 17 d 52.7 19-25.4 6.5 6 299 5.4 1.62 

11 q 32 52.6 19-23.4 155-15.2 3.8 5 2.3 0.0 

17 9 57 57.1 19-27.4 155-12.5 8.0· 1.6 6 324 9.1 1.00 4.3 

17 9 59 54.4 19-21.5 155- 8.0 26.40 8 331 03.5 0.22 4- .1 

17 10 4 11.6 19-21.5 155-25.1 11 10.2 0.11 O.R 

w 17 10 18 9.6 19-27.3 155-14.0 8.0- 1.2 6 3Ib b.9 1.04 

11 11 21 4.5 19-24.4 155-10.21 8.0· 1.5 6 323 10.1 0.43 l.7 

17 11 27 24.7 155-13.2 16.1 1.7 1 22:' 5.'1 O.3() 2.6 

17 12 13 18.1 19-24.4 155-15.5 3.4 6 247 2.8 0.14- 0.6 

17 12 Jq 26.5 19-24.4 155-16.4 3.3 0.9 9 202 1.4 U.2 

17 12 44 47.9 19- 4.1 155-52.1 21.1 2.8 10 259 21.2 4.4 1

17 13 10 2.4 19-23.2 155-31.0 4.0 4 15- 14.6 0.0 17 13 12 3.4 19-27.3 155-11.6 11.4 8 327 10.4- 0.48 2.6 

11 14 t.9 51.0 155-16.1 6.0 1.6 14 14M 0.09 0.6 

17 15 16 40.5 19-24.3 155-15.9 4.0 7 227 2.3 0.25 0.9 

11 16 21 7.3 19--19.1t 155-11.2 14.1 1.6 8 24& 4.9 0.14 1.6 

17 10 32 11 • 0 19-23.1 155-14.7 3.1 8 15A 2.5 0.07 0.6 

17 16 35 57.1 19-24.8 155-15.2 4.3 7 268 3.1 0.28 1.0 

17 17 50 25.3 19-24.0 155-16.8 2.5 1.2 9 161 1.0 0.08 0.4- 

17 i8 4 38.7 19-19.9 155-16.7 8.8 1.2 11 236 1.3 0.3- 0.9 

17 18 16 0.1 19-16.2 155- 6.4 7.3 8 246 12.1 0.71 4.0 

17 19 49 0.4 19-27.1 1S5-11.7 8.0· 1.4 6 328 10.6 1.37 5.6 
SUMMAwY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG DEPTH MAG NO GAP OM 1.'4 ERl ERti E

MAY 17 19 58 22.9 19-24.0 155-13.7 6.3 1.3 6 289 4.8 0.47 1.4 1

17 20 1 26.,+ 19-23.1 155-13.1t 8.0· 1.2 5 291 4.1 0.61 4.6 

17 20 5R 25.7 19-14.2 155-15.9 3.3 0.8 6 222 2.2 0.16 0.7 0

17 22 46 33.6 19'-23.8 155-16.5 3.1 0.9 11 173 0.9 0.11 0.7 0

11 22 53 19.3 19-19.4 1S5-14.1 9.3 2.3 16 170 4.9 0.12 1.0 0

Ib 0 0 51.0 19-25.1 155-17." 1.6 0.5 6 161 O.A 0.13 0.5 0

18 0 15 49.3 19-24.2 .155-15.8 5.7 1.0 9 224 2.3 0.14- 3

lts 0 31 12.7 19-24.2 155-14.9 3.4 0.9 6 260 3.6 0.11 0.7 0

18 0 52 4.2 19'-25.9 155-26.4 9.b 8 244 9.0 0.3) 1.3 1

18 1 30 19-23.0 155-14.9 4.4 0.5 7 245 l.1 O.4b 1.4 2

1 45 37.4 19-25.7 155-14.1 d.O* 1.2 5 303 5.3 0.5-' J.2 

Iii 2 15 41.6 19"24.1 155-16.3 0.1 0 7 152 l.b u.l 

2 21 21.6 19-17.3 155-13.2 11.0 1.7 8 253 9.0 O.IS u.q 1

18 2- 23 19-23.1 155-14.5 2.1 0.5 9 159 2.8 0.08 0.5 0

lb 2 Jl 57.9 155-15.4 4.2 1.3 6 257 2.9 O.lJ U.S 0

18 2 33 19-22.9 15S-15.1 "'.6 2.6 17 81 1.7 0.u3 \;.4 0

18 2 48 42.2 19-23.1 155-14.4 0.1 0 0.9 7 170 3.0 0.06 0.4 18 3 28 7.3 19-24.5 155-15.3 3.6 0.8 6 25b 3.1 0.06 0.3 018 3 S2 l3.0 19-23.8 155-15.1 2.l 0.6 10 161 2.9 O.Od 0.5 1

IH It 39 4A.3 19-23.5 155-14.7 2.8 1.0 10 175 3.0 a.Od 0.4 0

18 '5 20 4Q.4 19-23.6 155-14.9 5.2 0.8 7 173 2.8 0.19 0.5 1

18 5 37 31.6 155-12.7 A.3 1.4 7 312 1.0 2.17 6.5 6

lti 8 45 4.0 19-19.6 155- 2.5 8.0 2.3 13 13.7 0.34 2.2 0

18 8 53 28.1 19-18.5 155-15.4 7.9 1.5 10 226 0.28 1.6 0

18 10 '+0 56.7 19-25.2 155-15.1 8.0· 3 294 3.4 0.0 

18 10 40 5A.O 19-23.7 155-16.3 1.5 0.4 5 188 2.8 0.0 

18 11 55 17.8 19-25.9 155-25.3? 12.6 1.9 13 160 8.0 0.05 0.5 0

18 12 16 34.3 19-23.9 155-14.3 3.4 0.6 8 210 4.0 0.21 1. 1 1

18 12 30 48.2 19-24.2 155-11.5 3.6 1.2 10 61 1.0 0.14 1.1 1

18 13 19 11.6 19-20.3 155-12.2 9.2 2.7 16 168 4.0 0.11 1.0 0

II
SUMMAHY OF SEISMIC EVENTS (CONTINUED)

1910 HH MN SEC LAT N LONG w DEPTH MAG NO GAP DMIN ERT ERH 

MAY 18 13 25 3.7 19-23.2 155-14.2 0.4 9 166 3.1 0.12 0.3 

13 31 3.7 19-1d.9 155-12.8 1.5 12 235 b.b 0.11 \J.7 

18 11+ J5 53.0 19-12.6 156-24.1 8.0" 7 317 82.4 2.47 1"'.9 

Id 14 56 55.6 19-22.1 155-23.8 9.8 8 112 3.6 0.10 1.0 

18 16 26 59.2 19-21.1 155-16.2 7.4 10 174 2.0 O.lJ 0.8 

18 20 7 4.3 19-23.4 3.0 8 172 2.9 0.06 0.3 

18 20 59.8 19-57.4 155-40.0 13 ••• 5 332 58.1 3.14 78.4 

Ib 20 51.8 19-23.8 155-13.2 6 2q9 :.>.2 2.5 

18 23 9 37.3 19-5S.5 155-17.4 17.3 2.1 8 212 23.7 0.13 1.0 

1 49 54.6 19- 1.5 155-29.6 4.3 5 309 28.u 0.0 

19 3 23 9.2 19-27.9 155-34.6 16.1· 10 158 20.0 0.10 i.O 

19 4 5 7.1 19-13.1 155-22.6 30.9 1.8 12 195 13.1 0.33 1.6 

lY 4 35 32.1 19-22.7 11.6 6 152 7.3 0.16 1.5 

.p... 19 5 5 33.7 19-22.3 155-26.7 8.7 3.1 18 alto -'.1 0.07 0.7 

U1

19 5 9 33.5 155-26.6 11.3 8 154 1.7 O.Oy 0.8 

19 5 24 21.2 19-23.4 155-28.0 4.8 b 137 1U.2 1.2 

6 e 23.6 19-18.lf. 8.3? 11.2 ? .1 14- 221t 1.0 O.2d !.9 

19 7 14 0.7 19-24.? 155-15.8 3.8 0.9 6 227 2.3 0.22 0.8 19 10 30 11.6 19-24.2 155-16.3 - 4.0 1.6 12 152 1.6 0.5 

19 10 36 25.8 155- 4.5 2.2 2.0 lit 191 14.0 0.6'+ 1.6 

lq 10 43 16.7 19-24.0 155-11.3 2.3 0.9 10 121 1.3 0.03 0.2 

19 l(} 50 15.9 19-17.6 155-15.1 6.8 1.3 Itt. 210 7.M 1. 1 

19 10 50 4A.2 19-19.4 155- 3.3 2.2 !l 217 17.1 1.03 2.6 

19 11 35 4.3 19-23.6 155-21.21 2.6 15 157 2.7 0.29 2.4 

19 12 28 40.6 19-16.3 155-23.4 3.5 11 169 O.Of:j 0.7 

19 12 33 25.1 19-19.3 155- 8.9 16.8 7 299 5.0 0.78 4.1 

19 12 40 19.4 19-27.5 155-13.1 8.0* 6 321 8.4 1.63 1.4 

19 12 51 24.1 19-17.1 155-12.6 14.5 1.6 9 253 8.8 0.29 1.4 

19 13 6 15.4 19-18.6 155-12.Q 17.3 1.3 8 238 1.2 0.28 1.5 

19 11 14 3q.9 19-11.4 155"13.9 7.7 10 223 7.9 0.27 1.7 
OF SEISMIC EVENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERr ERH E

MAY 19 17 25 5.3 19-19.6 155-11.0 IS.1 8 250 4.4 O.jC) 1.8 2

19 11 25 30.9 19-24.1 155-11.1 8.0· 1.4 6 322 8.4 0.36 l.ft 

19 17 41 40.7 19-18.2 155-12.8 14.5 1.5 6 314 1.9 0.67 3.9 2

19 17 41 51.2 19-19.8 155"15.8 10.7 1.2 5 261 2.9 0.0 

19 17 52 45.6 19-20.9 155- 4.2 12.9 1.1 11 214 10.3 0.09 1.1 0

19 18 30 45.9 19-1A.7 155-15.6 7.5 1.6 8 223 4.1 1. " 0

19 18 33 3.6 19-19.2 155-15.5 10.1 11 191t- 3.6 0.10 0.9 0

19 18 49 40.1 19-24.9 155-27.41 11.2. 1.5 13 138 11.3 0.08 0.6 0

19 19 6 7.1 19-55.0 155-32.1 10.4 2.3 11 204 17.1 0.18 1.6 0

19 20 16 20.9 155-25.3 1.1 5 257 3.5 0.0 19 21 30 54.9 19-19.7 155-13.3 8.0 1.6 12 202 5.2 0.21 J..5 019 21 56 9.6 19.-a24.5 155-28.6 11.0 1.5 7 232 12.2 0.23 1.4 0

+:' 19 23 36 2q.8 19-31.8 155-46.2 8.5 6 189 15.9 0.30 2.7 4

'" 23 45.7 19-24.0 155-16.3 3.1 0.6 6 191 1.4 0.32 1.2 1

20 0 29 8.6 19-18.4 155-24.0 10.8 6 191 3.4 0.27 3.4 1

20 0 SO 54.4 19-16.2 155-13.0 7.8 11 11. 1 0.39 i!.2 1

20 1 53.6 19-37.8 155-17.9 38.4 2.3 14 201 17.b O.ld 1 .1 1

20 2 16 17.R 19-30.1 155-40.0 7.0 2.2 10 122 26.8 0.09 0.7 020 2 l.4 10.7 19-29.8 155-38.9 .... 1.1 9 118 27.7 0.14 0.9 1

20 2 37 42.1 19"'23.8 155-16.2 3.4 0.4 6 190 1.2 0.07 0.3 0

20 '+ 1 49.1 19-21.8 155-13.0 •• 0 1.0 6 178 1.5 0.19 1.8 1

20 5 25 34.0 19-23.2 155-14.9 5.9 1 .1 11 156 2.3 0.17 0.6 1

20 5 33 5q.2 19-24.3 3.B 0.8 6 245 0.09 0

20 44 29.0 19-20.3 155- 8.4 8.1f. 9 200 4.0 0.24 l.O 0

20 6 15 39.9 19"'23.4 155-26.9 7.8 2.1 13 130 8 •., 0.11 0.9 1

20 ,., 24 14.8 19-24.9 155-15.5 4.2 6 265 2.6 0.52 1.9 2

20 1 30 3.0 155-30.0 6.6 9 160 12.5 0.25 1.6 2

20 7 51 40.5 19-.1Q.2 155- 7.5 32.9 11 6.5 0.32 1.6 2

20 10 19 26.9 19-23.1 155-26.9 '7.3 2.7 16 1it 8.2 0.11 1.0 1

20 12 1 19-17.q 155-13.1 10.5 9 220 7.6 0.21 1.9 1

c.
SUMMAt1Y OF SEISMIC EvENTS (CONTINUED)

1970 HH MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH 

MAY 20 13 2q 41.8 19-20.6 155-12.9 8.5 10 189 3.5 0.12 1.0 

20 14- 8 0.2 19-1-'.8 155- 3.1 38.2 2.4 16 ??5 0.26 1.4 

£0 J.4 31 6.1 19-16.1 155-13.8 "'.5 1.3 8 261 10.8 0.52 2.5 

20 14 51 23.9 19-18.3 155-12.9 14.6 1.7 8 242 7.6 0.11 1.8 20 15 56 35.6 19-13.3 15S- 6.6 3.7 7 315 16.9 1.J7 5.2 

20 17 43 5.3 19"25.0 155-23.3 11.0 2.2 14 lla 6.6 0.5 

20 Id 7 10.8 1'J-l'r.9 155- 2.4 16 226 18.M 1.4 

2u 24 39.8 19-28.5 155-13.5 6 324 9.1 1.77 7.9 

20 18 57 53.3 19-1Q.O 33.1 7 194 0.19 1.0 

20 21 39 0.4 155-12.7 B.O· 1.3 6 321 8.3 0.80 3.1 20 22 26.3 19-18.2 155- 3.3 31.7 2.3 17 223 13.5 0.27 1.3 

21 () 41 58.4 19-24.q 155-29.5 12.q. 8 150 13.9 O.OR 0.8 

21 u 57 2.0 b 0.07 0.2 

.p-

........ cl 40.0 19-24.9 155.-16.1 0.0 1.1 10 173 0.5 0.04 0.2 

51 17.7 19-24.4 155,,15.7 4.2 6 242 2.5 O.lZ 0.4 

21 3 3u 23.2 19-24.1 155-15.8 4.1 0.8 b 222 2.1 0.24 u.q 

21 4- 30.6 19-1q.9 155-15.2 13.6 1.3 9 203 3.6 0.06 0.3 

21 35 17.6 19-24.3 155-lb.4 3.1 6 200 1.4 0.07 0.3 

21 b 5 42.0 19-17.7 155- 37.3 2.4- 16 225 13.9 1.3 

21 6 20 57.1 19-19.2 155-15.0 13.0 6 216 4.6 0.08 0.5 

21 1 40 2A.4 19-24.1 155-16.3 4.3 1.2 9 152 1.6 0.10 0.7 

21 9 44 19-16.6 11 233 q.3 0.31+ 1.'J 

21 9 '+7 23.8 19-10.2 155-34.4 8.3 13 135 9.M 0.08 0.8 

21 10 10 12.8 19-18.1 155-14.1 8.1 10 236 6.8 0.33 1.8 

21 10 19 24.4 19-12.8 155-2-'.6 8.6 12 170 15.6 0.10 1.0 

21 10 S6 16.0 19-19.8 155-16.6 11.3 8 243 1.6 0.11 0.6 

21 12 1 14.9 19-23.1 155"27.8 14.3 7 268 9.4 0.45 2.8 

12 24 26.2 19-23.7 15S-17.S? 3.2 0.8 11 95 1.3 O.Ob 0.4 

21 13 1 16.6 19-29.0 155-26.0 10.3 1.3 6 192 4.9 0.18 1.6 

21 13 27 19.8 19-24.1 155-15.9 3.4 1.2 10 163 2.0 0.05 0.3 
SU"''''ARY OF SEISMIC EVENTS (CONTINUEO)

1970 HR SEC LAT N LONG W DEPTH MAG NO GAJ.> DMIN ERH E

MAY 21 15 52 30.0 19-23.3 155-17.2 1.8 0.3 1 153 0.8 0.04 0.1 0

21 16 22 33.0· 19-19.6 155-27.8 b.6 6 15q 1.9 0.18 2.0 1

·21 17 cO 2.9.7 19-25.7 155-24.3 11.5 7 lA2 7.e. 0.11 1.0 1

21 16 6 24.6 17.1 1.1 12' 157 1.6 0.32 2.2 2

21 18 6 47.2 155-14.4 8.0· S 265 2.'i 0.24 2.4 

21 18 57 5&).7 19-18.1 155-12.7 14.6 9 238 7.0 0.21 1.0 121 19 4 18.3 19-24.3 155-17.1 2.9 0.6 8 134 1.0 O.Oj 0.2 0

21 20 11 42.4 19-18.4 155- 3.41 34.9 2.2 19 203 21.6 0.16 1.0 l

21 21 52 12.A 19-23.8 155-25.4 11.1 8 7.5 0.11 1.2 0

21 21 51 12.8 19-11.1 155- 3.0 1.6 13 1••'+ 1.7 2

21 22 49 lS.9 19-23.0 4.2 8 1.6U 2.8 0.15 u.s 1

21 23 .32 40.4 19-22.3 155-11.3 29.3 2.5 17 77 0.13 0.9 1

21 23 40 40.9 19-23.3 155-15.3 3.3 0.7 9 153 2.0 O.OA 0.5 

(X) 22 2 14 13.1 19-10.1 IS5-30.l1 1.3- S 17b 15.2 0.08 0.6 

22 3 37 44.4 19-23.6 155-11.6 3.2 1.S 12 lOA 1.5 0.5 1

22 4 1'5.1 19-16.7 7.1 1.3 9 217 9.4- 0.27 1.6 1 

22 4 54 23.6 19-24.0 155-11.2 2.1 0.3 5 133 1.2 0.0 

22 5 30 15.0 19-18.8 155-15.7 9.2 1.9 17 169 0.10 a.8 0

22 6 1 i!.2 20- 2.4 155-27.1 8.0 2.3 14 224 24.9 0.24 1.4 1

22 6 25 12.6 19-19.1 155- 3.9 37.1 2.2 18 197 11.1 0.22 1.2 1

2l 11 5A 40.1 19-23.8 4.8 1.2 11 181 1.2 O.2c 0.9 1

22 13 . 8 2Q.4 19-23.9 155-17.3 1.2 7 126 1.3 0.05 0.1 022 13 SR SQ.4 19-25.2 155-14.9 4.9 1.2 9 212 3.6 0.6 1

22 18 11 8.0 19-12.9 155-22.9 29.7 13 195 13.4 0.36 2.0 3

22 20 5 12.8 19-20.3 155-14 •• 8.1 1.6 12 196 3.2 0.21 1.3 0

22 20 28 53.4- 19-16.2 155- 3.0 38.6 12 246 16.0 0.53 2.6 4

22 21 56 32.8 20-21.5 156- 6.6 A.O· 3.2 11 336 94.1 5.46 J2.2 

22 23 8 26.3 19-23.8 155-17.0 1.6 7 139 0.9 0.03 0.1 0

Z2 23 11 51.8 19-21.4 155-25.2 8.2 1.7 11 1.0 10.5 0.09 0.7 0

23 1 58 1.9 19-25.6 155-22.0 8.1 1.5 12 151 4.4 o.OtS 0.6 0

't
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 t1R MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH 

MAY 3 5 42.5 19-23.7 155-17.1 0.1 8 131 0.9 0.05 0.3 

23 3 39 31.3 19-1q.5 155- 3.7 3"'. b 2.14- 16 191 16.4- 0.11 1.0 

2:i j 49 25.3 1<1-19.6 155-15.7 10.2 1.7 13 189 3.1 0.0'1 0.6 

23 4 9 25.6 19-24.2 1.1 2.1 13 8.6 0.10 0.8 

23 It- 13 43.4 19-17.5 1.4* 2.1 7 298 18.6 3.1 

23 'to IF, 2.3 19-2';.1 155-24.7 11.3 1.8 11 18& 9.0 0.07 23 4 51 40.9 19-23.2 155-25.1 lO.A I.R 12 l?l 6.4 0.06 0.6 

23 7 24.6 3.3 15 14.1 O.lv 1 .3 

23 l+? 37.1 19-19.3 155-16.0 13.1 1.5 8 ?lO l.8 0.11 0.5 

23 10 1 2q.3 19-24.9 8.1 1.3 8 109 0.5 0.11 0.3 

23 10 56 29.7 19-19.0 155- 4.01 33.6 2.2 18 198 11.1 0.30 1.5 

12 46 5.q 20- 154-54.3 8.0" 5 303 69.4- 1.63 1u.3 

23 13 38 51 .6 19-12.2 154-58.51 0.4- '6 273 26.d 3.59 1.5 

\0 23 14 14 3';.A 19-21.0 155- :l.A 7.9 2.2 15 208 0.16 t!..7 

23 1 1 26.q 19-14.3 155-26.3 11 211 12.1 0.2.:1 1.4 

23 16 15 3ti.7 )9-17.9 155- 2.b 222 13.H O.2.J 1.2 

1 7 5H 33.3 155-1S.b 3.6 0.3 b 239 2.b 0.13 0.5 

23 26 5i?5 4.5 5 15'+ 7.8 0.0 

23 19 13 20.6 lC1-24.2 155-16.4 ].0 1 • 1 b 201 1. 7 0.21 0.5 

23 33 19-1R.4 155-17.1 13 lq1 3.2 0.25 1.3 

23 23 5,",.0 19-19.0 155-13.4 14.9 fj b.l 0.4 

23 23 19-24.R 155-15.3 4.6 0.2 6 268 3.0 0.1- 0.5 

24 0 18 23.5 19-19.8 155- 3.81 41.2 2.3 18 196 11.'S O.q 

24 4 5 51.5 19-20.0 15S-18.fJ 27.2 12 167 0.23 1.3 

24 4 '+8 1.6 19-1R.8 155-1b.l 10.1 1.5 14- 194 3.3 0.08 0.6 

24 5 23 57.9 19- 8.9 155- 5.51 8.0 0 2.4 14 250 13.3 24 5 31 57.0 19-1A.4 155-13.5 10.4 2.1 IS 198 0.11 0.9 

2'+ 1 4 4.3 19-19.9 155- 8.2 31.5 9 294 4.ti 0.37 2.0 

24 1 20 52.8 19-1q.9 155-13.5 7.4 1.4 9 212 6.3 0.27 1.7 

24- 12 38 37.2 155-37.81 7.2 9 263 23.0 0.63 2.9 
SU""MAWY OF SEISMIC EVENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG wi DEPTH MAG NO GAP OMIN ERT ERH E

MAY 24 12 tj7 24.2 19-1A.4 155- 3.1 35." 2.4 18 201 0.17 0.9 

24 16 31 12.2 lCJ-21.9 155-11.0 9.B 6 176 1.7 1.03 2.9 5

24 17 55 20.8 19-26.2 10.8 9 154 0.4 0

19 18 35.0 19-24.1 155-25.2 11.4 1.6 12 124 O.Ob 0.6 

24 19 54 6.1 19-20.1 155- 4.0 40.4 2.5 18 190 10.1 0.20 1.1 

24 20 4 11.3 19-24.1 155.. 11.6 9.0 1.2 7 113 O.l 0.28 0.7 

24 20 16 18.6 19-22.6 lSS-11t.4 6.5 1.9 15 126 2.1 0.05 0.5 0

24 lq 19-23.0 155-18.1 5 151 2.2 0.0 

24 21 41 SA.3 19-15.1 155-23.9 3.5 10 170 0.08 0.8 

24- 22 3d 45.8 19-23.8 155-20.Q 11.9* b 32::J 0.17 3.2 

24 22 '+7 2S.9 19-24.7 155-11.6 7.5 6 11'+ 0.1 0.31 0.8 

24 22 1+9 ?2 19-24.5 155-17.6 1i.1 1.2 103 0.5 0.6 0

24 23 21 ZQ.1 19-24.1 155-18.4 7.6 1 • 1 7 126 1. q 0.5 

V1

0 u 3 23.7 155-18.2 6.1 7 144- l.1 0.28 0.9 

25 0 13 19-11.3 155- 3.1 3f,.8 1.7 15 228 14.7 0.20 1.2 

0 "6 42.5 19-23.q 155-1d.3 6.8 6 2.1 0.39 1.0 2

25 1 1 0.2 19-24.B 15S-17.'l 7.4 1.3 7 125 0.6 

1 19-23.5 155-19.1 6.q 1.0 5 175 1.2 0.0 

25 . 1 11 • 7 19-24.0 155-1A•• 7.6 5 133 2.0 0.0 

25 1 15 19-23.1 155-17.9 6.3 1.0 6 141 1.9 0.07 0.3 0

25 1 26 41.3 19-24.5 155-1A.2 5.5 1.0 8 101 1.4 0.18 0.6 

25 1 27 q.4 1'1-24.3 155-18.4 0.9 6 lib 1.8 0.20 0.9 l

25 2 3 21.9 19-23.2 155-19.1 O.R 8 191 1.4 0.9 

25 2 44 0.2 19-24.9 155-17.5 6.9 0.9 7 134 0.3 0.08 0.3 O

25 2 57 4.1 19-14.2 154-53.61 4.4 2.0 10 280 1.33 5.5 4

25 3 45 14.0 19-15.4 155- 2.1 41.3 12 251 17.3 0.73 3.5 5

3 55.6 19-24.0 155-18.3 8.1 0.9 8 129 1.9 0.21 U.S 

25 3 53 39.0 19-26.7 155-36.5 7.6 1.4 11 253 21.<i 0.3'+ 1.7 025 3 56 10.9 19-23.8 155-18.1 9.1 1.0 6 142 1.9 0.12 0.2 0

25 4 2 47.5 155--17.9 9.6 0.8 7 138 1.8 0.08 0.2 0
SUfl4MAHY OF SEISMIC EVENTS (CONTINUEO)

1970 MN SEC LAT

N LONG DEPTH MAG NO GAP ERT ERH 

'-'AY 25 q. 25 33.1 19-24.4 155-18.0 8.4 0.8 8 113 1 • 1 0.1u 0.3 

'+ 't-3 A.3 lH-S5.5 155- 5.0 2.7 13 281t- 51.6 &.9 

5 '+5 q.l 19-17.5 155- 3.1 37.7 1"- 226 14.4 0.23 1.3 

25 5 51 18.1 155-17.1 8.2

6 105 0.5 0.35 0.8 

2S 5 52 40.4 19-21.3 155-16.2 25.7 1.8 16 139 2.2 O.ll 0.9 

25 6 8 32.3 19-24.4 9.6 1.0

7 107 0.6 0.6 

25 6 3R 8.4 155-17.0 Q.2 1.4

7 148 0.6 0.1 

25

7 6 28.5 19-24.9 15.4 1.3 6 128 1.01+ 5.0 

25 1 "8 34.5 19-20.6 155- 1.3? 8.0· b 224 8.89 0.0 

8 44 11 .0 19-27.0 155-37.0 7.7 1.4 10 258 22.3 0.42 2.1 

25

M '+5 1,.4 1SS- 2.6 40.6 14 247 16.6 2._ 

25 11 3 155-37.4 6.0 1.1 10 261 23.3 0.19 0.9 

11 23 3A.9 1<;-21.3 155-26.1 7.1 10 138 5.3 0.12 1 • 1 

U'1

...., 25 11 31 1.6 19-36.7 154-51.6 8.0* 5 259 16.1 0.71 :>.5 

25 11 5,+ 52.3 19-45.4 155-21.4 31.3 2.7 20 176 10.5 0.15 0.7 

25 12 44 15.5 19-21.3 154-56.41 H.4* 6 14-.4 O.'+u 

13 49 19-18.3 155- 3.2 J6.3 2.2 17 221 13.6 0.25 J..4 

1'+

2 53.1 6.5

8 10.0 :i.e 

25 1'+ 21 36.7 19-48.3 156- 0.8 4.0 2.7 14 2QO 32.q 5.5 

16 l.7 J3.0 19-2f.,.1 154-57.11 A.2 5 19b 1.6 0.0 

25 lH 13.3 19-15.1 155-46.0 ll.b 3.0 15 247 0.27 1.5 

25 t!l 7 54.6 19-19.0 155-14.2 7.6 11 O.2b 1.4 

25 21 2} Q.3 19-24 •. 4 155-23.8 3.40 0.6 10 178 7.3 0.10 0.6 

25 21 ='5 c9.6 19-17.b 155- :-4.0 38.6 1.9 16 ?26 0.33 1.7 25 2c 13 59.4 19-23.2 155-17.9 2.3 0.5

6 166 2.0 0.49 O.A 

25 22 40 4A.9 19-23.8 155-18.3 11 • 1 1.2 8 141 2.1 0.3" 0.1 

25 22- 46 4q.4 19-12.3 155-26.61 10.0 2.0 1 178 15.1 0.15 1.4 

26

0 24 7.6 19-24.1 155-17.9 7.6 0.5 8 123 1.3 0.14- 0.4 

2b

0 jQ 0.2 19-23.4 155-18.U 6.- 0.6

7 165 2.1 0.88 2.2 

1 l.9 30.9 19-23.5 155-19.8 3.7 0.5

7 242 0.5 0.30 1.3 
Of EVENTS (CONTINUED)

1970 tiR r4N SEC LAT N LONG W Ol:::PTH MAG NO l,AP DMIN ERT ERH E

MAY lb 0.2 155-17.9 11.3 1.1 8 131 1.5 0.22 1. 1 1

2t:J 3 38 5A.O 19-23.9 155-17.9 0.9 1 106 2.2 0.34 0.6 1

26 3 39 50.6 19-24.5 155-11.9 6.2 A 107 0.8 O.lb 0.8 1

?b .J 43 19-24.4 155-17.9 7.9 0.5 7 128 0.9 1.5 5

2b It 7 16.5 19-23.9 155-17.9 5.4 0.1 7 137 1.7 0.46 1.3 2

26 4 11 6.1 19-24.6 155-11.4 d.8 0.6 7 96 0.3 0.46 1.0 2

20 4 '+9 1.4 19"l9.1 155-17.8 1.3 7 312 6.8 0.1. 1.3 

2b 5 21 35.0 19-2h.5 lS5-2b.6 16.4 7 250 8.4- 0.38 1.7 3

6 15 37.4 19-1A.1 155- 3.01 40.8 2.3 18 203 13.5 U.2it 1.3 1

26 8 2 22.5 19-25.5 155-19.8 17.6· 6 2A5 3.4 O.Ob 1.3 

20 8 10 13.5 19-17.1 155-13.3 .lll- • 1 7 248 8.3 0.23 1.2 1

20 8 t:J1 23.5 155-13.21 81.70 3.2 11 56.4 4.66 0.0 

26 9 35.2 19-24.8 15·5-1 7.8 10.4° 0.8 4- 221 0.5 0.0 

V'1

N 20 33 A.O 19-23.7 155-18.0 5.2 0.1 5 142 2.0 0.0 

2" 10 0 27.9 19-12.5 155- 9.91 A.O· 1.6 19 231 17.1 3.,..0 21.6 

26 11 49 21.1 155-21.61 11.4- 1.5 11 19b 5.0 0.13 1 .1 0

J.2 8 46.3 19-28.9 155-39.4 8.3 1.8 d 216 26.2 0.41+ 1

20 2S 9.0 19-18.6 6.2 1.3 8 242 4.ti 0.9j 2.4 4

12 51 29.1 19-25.8 155-18.1 14.4* 6 274 2.9 0.03 0.6 

26 13 8 26.8 19-23.4 0.1* 0.1 6 151 1.3 0.08 0.5 

2b 13 lit- 49.A 19-?3.A 155-20.4 15.0'" 1.5 5 319 1.2 0.8 

26 1J 3P.O 19-20.0 155- A.1i 12.0 1.6 10 304 0.20 1.5 1

26 13 41 19-17.'+ 20.3° 1.1 5 319 11.8 7.0 

26 44- 40.2 19"20.0 155-18.4 1.7 11 168 1.7 0.45 l.e 4

26 14 !:)3 56.8 19-23.8 155-18.3 11.5 1.2 7 109 2.3 0.18 0.8 1

26 17 46 38.0 19-22.1 155- 8.51 b.2 3.3 20 170 2.1 0.33 2.4 1

26 18 12 21.1 19-24.6 155-17.5 7.6 7 94 0.1 0.11 0.3 0

26 18 19 2.8 19-19.9 155-16.7 11.2 1.5 8 238 1.3 0.08 0.6 0

26 18 20 11.6 19-19.9 9.9 1.2 1 234 1.1 0.4 1

26 20 3 31.6 19-19.6 155- 2.1 11.0 2.1 12 230 14.1t- 0.34 2.5 0

It
OF SEISMIC EVEN1S (CONTINUED)

1970 tfk SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH 

MAY 26 20 45 2.3 19-24.9 155-17.5 7.0 0.9 7 99 0.'+ 0.18 0.5 

26 20 :;1 19-24.0 1S5-18.3 7.7 1.0 8 128 1.t..J 0.30 a.R 20 30.5 19-1&.7 155-11.3 6.5 1 274 9.7 0.14 3.5 

2b 22 3 21.6 19-Z4.Y 155-11.6 h.9 6 132 0.3 0.2 

26 22 19 36.8 19-24.1 155-18.0 7.6 0.9 7 12b 1.4 0.34 0.8 

26 22 30 20.9 19-24.8 155-11.5 Q.5 6 120 0.1 2.12 4.4- 

2b 22 33 5Q.7 155-25.6 7.4 8 1&1 4.2 o 1 • 1 

26 22 3'1 46.9 1'1-22.8 8.7 8.0-0 6 33ft b.1 0.57 3.2 

20 22 30.1 19-24.5 155-18.3 4.1 6 109 1.4 0.16 0.1 

2b 23 13.5 155-18.1 10.8 0.7 7 194 O.Oq 2.4 

27 0 4- 2q.2 155- 3.1 33.3 16 219 ll.3 0.23 1. 1 

27 0 14 13.7 19-22.1 1!)5-13.5 7.1 1.3 12 145 0.1 1.0 

27 . 0 2S 7.5 155- 3.91 2.8 30 219 1.5 0.34 2.1 

\J1

w 2., 0 40 1.,-21.9 155-13.5 7.6 0.8 11 153 3.l 0.15 1 • 1 

21 0 50 12.q 19-21.1 155-13.q 7.8 13 1 73 l.ti 0.17 1 • 1 

27 0 54.3 19-21.5 155-16.0 7.1 10 1.4 0.08 

27 1 22 25.q 19-24.8 155,,17.5 6.3 0.5 7 153 0.1 0.14 0.4 

2 36 19-24.5 155-1a.7 4.0 0.6 7 109 2.1 O• .3l 1. 1 

27 3 21 19-21.2 155-25.1 8.3 9 143 10.6 0.12 0.9 

27 3 36 8." 19-26.0 155-34.8 2.0 10 240 ?O.8 1.1 

27 4 '+A SA.2 155-1e.S 6.5 6 142 2e1 0.57 1.5 

27 5 4 7.1 19-25.1 155-15.1 I •• lit lCl7 3.3 0.06 O.M 

2-' 6 39 2.4- 19-21.9 155-24.7 10.2 10 115 3.9 0.09 0.9 

27 7 41.1 lA-Sf,.3 155-21.0 20.0 lit 274 30.b 

27 9 35 25.4- 1':1-21.8 155-?5.3 11 • 1 11 134 4.5 0.0'1 0.8 

27 10 19 36.2 19-24.0 155-17.6 8.2 1.0 8 101 1.3 0.16 0.4 

27 10 26 42.3 19-19.8 155- 0.6 20.0* a 344 16.8 3.'5 

27 12 47 0.1 1'J-23.9 155-14.3 4.3 7 274 4.0 0.54 1. q 

27 18 15 39.1 19-21.3 155-11.8 6.4 8 183 3.2 0.2. l.@ 

27 18 29 43.4 19-25.6 155"24.5 8.9 1. 1 11 207 1.0 0.37 0.9 
SUMMAHY OF SEISMIC EVENTS (CONTINUED)

1970 HH MN SEC LAT N LONG w DEPTH MAG NO GAP DMIN ERT ERH ER

27 15 50.5 19-1Q.4 155-16.1 9.9 1.5 16 164 2.6 0.07 0

27 23 27 57.1 19-24.1 155-18.1 8.'+ 0.9 7 126 0.30 0.6 1

0 10 34.5 19-17.3 155- 3.2 31.4- 1.9 16 227 14.6 0.11 1.3 

28 1 7 50.3 19-23.b 155-19.1 4.7 0.6 6 116 1.0 0.25 0.9 128 2 24 Q.8 19-27.4 155-25.7 13.1 1.9 11 194 6.2 0.09 0.8 0

28 2 25 2n.2 19-24.9 155-11.6 10.2 0.9 6 118 0.4 0.83 U.9 4

28 5 4- 56.1 19-24.0 155-17.3 9.5 1.1 6 193 0.3J \J.9 1

28 5 IH 9.1 19--22.2 155-19.1 11.0 6 262 2.7 1.01 2.2 4

b 0 16.0 19-24.'7 155-17.9 5.5 0.9 6 115 O.b 0.51 1.6 3

28 6 33 1.8 19-23.5 155-18.0 0.3* 0.4 6 151 2.2 0.13 0.7 

28 7 12 35.6 19-25.2 15S-16.Q 8.5 8 180 O.b 0.36 1.2 2

7 33 4q.6 19-24.6 155-17.5 7.5 0.8 6 95 0.1 0.16 0.4 O

28 12 25.8 19-17.9 155- 5.3 26.60 10 327 10.9 0.45 1+.7 

V1

+=' 28 18 22 13.5 19-25.5 155-16.0 3.0 2.5 14 93 2.1 0.01 0.4 0

2b 22 31 155-25.2 10.2 3.5 17. 129 7.3 0.10 o.a 0

2'1 0 0 14.3 155-1t4.1 1 • 1 1.0 7 121 1.4 0.'54 1.3 3

4 2 34.8 19-14.6 155-18.0 5.1 0.9 7 105 0.9 O.2'i 0.9 1

29 4 2q.8 ItJ-23.8 155-19.3 f).1f. 1. 1 6 149 o. -, 0.41 1.1 2

29 42 R.S 19-15.5 155-13.5 1.0 8 269 lO.t3 0.8S ".1 1

29 fJ 26 itA.4 19-19.5 155-14.1 1.7 0.9 13 216 4.8 0.23 1.3 0

29 8 19 30.8 19-22.0 155-24.3 Q.5 9 202 3.9 0.18 1.2 1

29 20 A.9 19- '9.0 155-45.9 8.0 0 3 ?90 ItJ.8 0.0 

29 9 33.1 19-24.6 6.0 1.0 1 114 1.2 0.27 o.q 1

9 57.1 19-24.9 155-11.'i 12.5 1.5 5 lSb 0.8 0.0 

29 10 1S 18.4 19-27.6 155-24.9 19.3· 5 342 11.5 0.28 2.1 

29 11 18 19-23.9 155-19.3 2.9 4 239 3.4 0.0 

29 1 1 18 28.2 19-25.6 155-24.3 8.2 10 203 7.3 0.18 0.6 1

29 11 ::is 56.2 19-24.4 155-18.4 4.9 0.4 6 119 1. 1 0.9 2

29 12 3 38.5 19-2r;.o 155-17.4 3.1 0.5 5 203 0.7 0.0 

29 12 14 13.1 19-19.9 155-14.2 7.8 12 208 4.U 0.22 1.3 0
SUMMAkY OF SEISMIC t:VENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG w DEPTH MAG NO GAP DMIN ERT ERH 

29 12 51 26.6 19-23.7 b.O 0.8 8 154 1.5 0.23 0.7 

29 14 36 52.1 19-24.6 8.A 0.9 7 9- 0.1 0.40 0.9 

29 -15 7 27.3 19-23.8 155-18.0 7.9 6 96 1.9 0.53 1.3 

29 35 19-24.1 155-18.0 A.2 0.9 7 83 2.2 0.34 0.8 

29 15 36 54.9 19-24.2 155-18.4 6.4 0.6 8 120 1.9 0.19 0.6 

29 15 43 30.4 19-24.3 155-18.0 3.4 0.2 '" 109 2.0 0.0 

2q 16 3 Q.O 19-25.4 9.2 1.3 6 171 2.0 0.56 1.3 

29 16 5.3 19-24.1+ 1... 0 1. 6 168 1.0 0.39 1.3 

29 10 30 19-24.2 155-18.8 5.0 1 .1 6 170 2.4- 0.31 1." 

241 16 35.3 155-16.4 12.7 1.0 6 181 2.0 0.56 J.8 

17 31 25.1 155-11.8 10.2 0.7 7 l1u 1.8 0.41 0.8 

29 1t; 33 0.2 155-11.2 6. 1 0.8 6 O.b 0.33 0.5 

29 18 3d 6.5 19-24.6 155-17.1 9.5 5 140 0.6 0.0 

U1 19 17 51.0 19-22.8 155-20.0 5.3 1 • 1 6 256 5.b 0.22 1.3 

U1

29 21 14 19-23.2 155-18.5 5.9 1.0 8 181 2.3 0.15 0.5 

29 21 54.0 19-23.6 155-19.2 4.1 " 172 0.14 0.6 

22 3.l.8 19-24.2 155-17.8 10.1 1.5 8 118 1.0 0.1u 0.4 

-2i!. 39 36.2 19-14-.5 155-17.7 8.6 1 • 1 8 lOj 0.'+ 0.12 0.3 

29 b 52.3 19-24.0 155-17.9 7.2 1 • 1 7 129 1.5 0.11 0.5 

29 23 59 19-24.3 155-17.9 8.3 0.9 8 116 1.0 O.2Q 0.8 

30 U ]5 50.5 19-14.9 155-12.7 7.4 12 217 12 •., 0.25 1 • .3 

30 0 '+5 14.7 19-11.5 155-12.9 14.7 1.7 A 253 9.0 0.35 1.6 

30 1 Q 19-26.2 155-10.7 15.7- 1.4 b 294 2.1 a.os 0.8 

30 1 33 IS.0 19-23.2 155-18.4 4.3 1 .1 6 183 2.4 0.35 1 • 1 

30 2 18 30.7 19-23.8 155-18.2 4.8 0.7 7 143 2.1 0.23 0.9 

30 2 19.5 19-24.4 155-18.3 S.O 0.9 7 112 1.6 0.23 0.7 

30 2 22 19-23.7 155-11.8 7.8 1.0 8 143 1.8 0.21 0.6 

30 3 31 14.8 19-24.0 155-18.1 10.2 1.0 8 131 1.7 0.59 1.3 

30 3 43 42.8 19-24.5 155-18.1 8.9 1.2 6 107 1.1 0.71 1.5 

30 It- 44.5 19-24.6 155-17.9 9.8 1 • 1 8 90 0.8 0.34 0.7 
SUMf\1ARY OF EVENTS (CONTINlJEO)

1910 HF< SEC LAT N LONG W ()fPTH MAG NO GAP DMIN ERT ERH ER

MAY 30 4 24 43.3 19-22.5 155-17.A 8.1 0.8' 7 198 2.5 0.85 2.3 4

3U 13 44.1 19-23.9 155-}8.4 1.6 1.0 8 106 2.i! 0.28 0.6 1

30 5 48 lA.'5 19-23.M 155-17.7 3.4 0.9 8 137 1.7 0.16 0.7 1

30 b !6 43.5 155-17.9 10.1 1.1 6 122 1.2 0.20 0.5 1

30 7 15 1.6 19-23.8 155-18.0 10.7 1.4 10 108 1.9 0.35 0.9 2

30 7 10 7.6 19-23.3 155-18.0 b.2 1 • 1 7 162 2.1 0.21 0.7 130 q 56 30.5 19-12.8 155-32.5 8.1 10 136 9.0 0.08 0.9 0

30 11 44 47.8 19-23.8 155-18.4- 10.1 1.4 8 100 2.2 0.9 2

30 11 47 11.0 19-24.3 6.3 0.1 7 86 1.1 0.23 0.7 1

30 11 51 31.5 19-23.8 155-18.1 9.7 1.0 7 142 2.0 0.33 1.0 1

30 11 54 2A.O 19-24.1 155-18.0 11.0 1.3 8 R2 1.3 0.62 1.2 3

30 12 11 10.9 19-24.4 155-17.3 11.4- 1.5 9 87 0.7 0.12 0.1 1

30 12 28 4Q.5 19-24.1 155-18.0 H.S 0.9 7 128 1.15 0.36 0.8 2

V1

0\ 3U 12 35 J3.b te.) o.q d 81 2.! 0 • .30 H.7 1

30 12 53 -;8.6 19-24.3 155"17.7 Q.2 O.A 8 90 0.7 0.37 o.q 2

30 13 1 22.2 19-24.5 155-17.7 9.3 1.2 9 83 0.6 0.22 0.5 1

30 13 2 SQ.3 19-24.2 15S-17.Q 8.9 1.2 9 98 1. 1 0.24 0.6 130 13 11 24.1 19-25.1 155-11.1 1"3.2 1.7 8 91 0.5 0.35 1.3 230 13 17 5'5.9 19-3b.8 155-14.31 22.5- 2.1 9 20.- 0.40 15.3 

30 13 26 43.0 19-23.5 155"18.3 12.3 1.5 1 120 2.4- 0.32 1.0 2

30 14- 55 3q.7 19-55.2 155-56.8 5.4 9 247 28.b 0.49 5.5 330 18 11 0.2 15S"?7.B? 11.2 2.0 13 13b 10.3 0.7 030 18 54 35.6 19-21.4 155-13.3 13.9 1.4 7 167 3.5 0.21 0.7 

30 21 36 31.0 19-19.0 155-13.8 b.1 1.2 13 206 5.7 0.17 1. 1 0

30 2S 37.5 19"28.6 155-39.0 "".s 9 165 25.4 0.01 0.6 0

30 23 32 27.1 19-18.9 155-13.0 6.8 8 216 7.6 0.26 1.7 1

30 23 33 6.1 19-22.3 155-12.2 9.8 1.4 13 145 3.9 0.07 0.7 0

31 2- q 29.7 19-20." 155-16.4 32.6 13 152 3.1 0.13 0.9 1

J1 4 20 2.9 19-21.3 155- 5.4 •• 6 2.6 18 lAO 17.3 0.14 1.1 0

31 11 42 1.1 19-19.0 155- 9.7 30.2 1.9 13 270 11.0 0.40 2.5 2
SUMMARY uFo SEISMIC E\iENTS (CONTINUEO)

1970 HR MN SEC LAT N LOr.4G W DEPTH MAG NO GAP DMIN ERl ERt-4 

MAY 3l 13 47 53.3 19-24.5 155-17.9 10.2 1.2 7 106 0.07 0.2 

31 4 54.9 19-13.2 155-26.11 9.2 2.1 11 165 l.i. 

31 15 35 1 • q 19-i?3.7 155-17.H 5.7 1.0 8 141 l.ti 0.11 0.4- 31 15 44 32.9 19-24.3 155-17.7 9.2 I.? 9 91 0.9 0.21 0.5 

31 16 23 55.2 19-24.2 155-17.8 8.1 1.1 9 84 1 • 1 0.25 0.6 

31 18 '+7 53.4 19-25.4 155-17.1 10.9 0.9 7 218 0.53 1. 1 

31 19 16 4.6 19-2_.1 4.7 7 121' 1.4 0.21 0.1 

31 19 41 4(,.1 19-23.2 155-14.4 3.2 8 166 3.0 0.6 

.jl 19 44.1 19-23.4 155-18.9 1.0 7 178 1. S O./t>J 1. 1 

31 20 37 48.2 19-23.6 155-16.01 3.3 0.2 7 197 1.5 0.64 1.5 31 20 57 19-23.1 155-18.4- 7.7 1.0 8 154 2.3 0.24 0.8 

31 21 13 IS.1 19-24.4 155-17.6 q.a 0.9 8 105 0.5 0.26 0.7 

31 21 18 43.1 19-24.3 155-17.9 9.8 1 .1 7 117 1.0 0.21 0.6 

\J1

'-J 31 21 4q.8 19-20.8 155-1ti.l 25.H 2.0 117 1.M O.SA 2.3 

31 21 43 SQ.4 19-21.1 155-16.4 29.2 1.8 11 137 2.3 0.11 0.9 

31 22 21 12.3 155-18.1 0.1 0 0.4 7 10'" 2.2 0.11 

31 22 25 36.7 19-24.7 155-18.3 1.1 0.9 6 9t:i 1.4 0.4 

31 23 lA 35.9 19-18.1 155-16.9 30.2 13 171 3.1 0.3'+ 1.5 

31 23 41 25.9 19-17.4- 155-12.0 H.4 '1 262 8.8 v.3d 1 • "'i 

1 0 48 52.4 19-19.3 155-16.2 11.4- 1.0 7 2.0 O.lb (I.b 1 0 56 3.9 19-24.1 155-11.1 3.4 1.3 7 124 0.33 0.1 1 1 48 3.4 19-24.3 155-18.0 4.0 0.8 6 111 1.2 0.17 o. '7 

1 1 3'1.4 19-25.7 155-11.01 28.2 12 150 10.4 0.14 1.2 

1 2 19 19-25.1 155-17.3 7.5 1 • 1 9 174 0.6 0.10 0.5 

1 3 6 55.0 19-24.3 155-17.9 8.0 0.9 7 lib 1.0 0.72 1.6 

1 3 32 29.1 19"24.2 155-18.3 7.9 1.3 8 102 1.6 0.22 0.5 

1 3 44 10.8 19-24.6 155-17.8 9.3 1.4 9 90 0.6 0.09 0.3 

! 3 49 10.2 19-24.1 155-17.1 9.2 1.2 7 121 1. 1 0.42 0.9 

1 4 46 56.8 19-18.3 155- 1.8 5.7 2.0 12 236 23.7 0.44 2.9 

1 4 56 15.5 19-24.1 155-18.3 5.5 0.8 7 126 I.A 0.41 1.2 
SUMMAHY OF SEISMIC EVENTS (CONTINUEO)

1910 HR MN SEC LAT N LONG W DEPTH NO GAP OM ERT EHH ER

JUN 1 5 3 14.3 19-24.2 155-18.2 6.1 0.8 7 120 1.5 a.lt> 0.4 1

1 5 22 4A.9 15S-16.M 11.8 1.3 7 161 1.2- 1 • 1 2

1 b 15.0 8.5 1.2 1 O.1J 2.2 41 7 18 20.8 19-24.8 155-16.0 1.1 7 231 l.d 0.30 1.6 2

1 7 23 36.8 19- 6.6 155-34.8 8.7 12 153 6.4 0.08 1.8 11 7 53 38.5 19-28.0 155-24.1 12.6 1.2 7 226 -.1 0.41 3

1 9 41 44.3 19-20.8 155-13.0 9.3 1.3 14 184 3.2 0.1:» 1.0 0

1 10 51 lR.l 19-21+ 0.1 155-10.51 3.2 1.4 9 13'.1 1.3 O.vb 0.4 O

1 19 jO 5.1 19-1R.2 155-17.1 1 • '7 10 1 1 U 3.6 0.21 1.3 t.

1 21 c9 10.5 19-27.6 155-}4.31 8.0· 1.3 9 279 1.u 0.61 4.9 

2 1 17 44.3 19-20.3 7.8 1.3 8 166 12.6 0.13 1.1 1

2 8 56 4B.3 19-24.2 155-24.1 12.2 1.5 9 212 1.1 0.28 1.3 2

LT1 2 lb 33 56.4 19-21.5 155-12.q 9.0 13 168 1.9 0.17 1.20 0

co 3 1 A 19.3 19-20.9 155- 7.0 5.8 1.8 If> 180 10.1 0.20 1.3 1

3 2 13 1';.7 19-22.3 155-40.2 10.9 1.8 11 132 14.1 0.06 0.4 0

:i b 14 13.3 If1-37.9 156- 5.7 5.3 l.O 10 262 22.1 0.97 4.3 2

3 53 44.9 155-11.3 9.b 1.7 11 169 2.1 1.0 0

4 1 52 49.0 19-21.0 155-12.3 10.1 1.3 15 184 2.1 0.10 0.9 0

4 12 5 21.9 19-20.3 155-16.1 34.6 2.5 11 15J 1.2 0.10 1.0 1

4 12 12 19-24.2 1')S..?5.b 13.7 1.5 8 231 8.5 0.46 1.7 3

15 55 10.1 1'1-4Q.3 155-25.91 35.·9 1.9 14 157 5.6 O.3ti 2.5 3.

4 It> 13 24.0 19-31.9 155-29.61 15.40 10 160 11.1 0.38 :J.6 

4 19 1 4A.2 19-1Q.O 155-16.1 1.9 2.8 18 16b 3.0 0.12 0.9 0

4 19 21 32.1 1\j-24.4 155-23.5 9.6 1.6 14 140 6.9 0.07 0.6 0

4 23 53 2.1 19-22.2 155-28.8 8.1 1.8 14 101 16.2 0.09 0.9 0

5 1 43 5.0 19-19.5 155-16.1 q.9 1.0 11 188 2.5 0.10 0.8 0

5 3 34 23.7 19-24.5 155-23.9 9.4 2.3 15 73 7.5 0.10 0.9 0

5 8 9 50.6 20- 1.8 155-46.5 18.0 2.6 19 253 1.q 0.48 2.9 4

5 13 7 f,.1 155- 1.3 6.3 1.9 9 231 21.S 0.20 1.3 0

17 3f, 1.2 19-24.8 154-53.9 13.6° 2.1 10 289 28.7 1.0tt 6.8 
,

SuMMAHY uF SEISMIC EVENTS (COf-.JTINUEO)

1970 HR "'i'I SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH 

JUN 5 19 25 16.5 19-21.3 155-18.4 30.6 2.9 20 83 0.12 O.A 

20 3 49.3 19-17.b 155-13.71 11.3 1 • 1 9 223 1.9 O.2b 

5 20 38 57.6 19-29.3 155-42.61 1.2 1. Q 14 170 22.4 0.22 1.5 

5 22 1 0.0 19-21.5 155- 8.6 9.0 1.7 13 193 2.5 0.15 1.1t 

6 2 54 42.7 19-20.5 155-13.2 8.9 11 189 3.9 0.11 1.4 

b 5 30 47.0 19-24.6 155-23.41 11.2 3.4 18 11 6.7 O.Ob 0.6 

b 7 41 1.6 19-33.q 155-33.9 1.0 2.3 15 83 20.0 O.5d 0.9 

6 8 12 52.7 19-21.6 155-10.1 1.3 10 244 0.4 O.lQ 1.4 

6 9 9 57.1 19-22.2 155-22.8 10.1 1.4 10 11-- 3.t; 0.09 U.8 

6 9 12 12.5 19-22.5 155-21.9 a.a 1.0 11 13tJ 4.5 0.12 0.8 

6 9 41 39.4 19-22.7 15S-10.8? 3.1 1.2 10 20b 2.1 0.31 1.4 

b 11 43 3n.4 19-19.3 15S-13.Q 9.9 1.5 IS 195 5.2 0.1 

b 12 14 57.9 19-22.5 7.4- 1.3 11 113 4.j 0.11 0.8 

VI 6 17 47 s.a 155-22.71 1u.1 1.6 10 165 3.7 0.34 1.0 

\0

7 5 59 41.1 155-20.4 28.0 1.7 7 231 17.3 0.41 3.2 7 9 49 11.6 19-23.2 155-18.3 21.1 1.8 10 73 2.h 0.45 !.3 

7 If) lA 17.5 19-27.0 155- 6.6 24.2- 1 311 12.2 0.20 2.0 

7 11 30 58.6 18-56.7 155- 9.0 8.0· 2.5 19 260 45.0 0.25 1.6 

1 16 29 16.1 19-25.5 155- 1.7 0.0 2.3 16 166 15.0 0.1- 1.0 1 18 43 30.2 19-24.2 155- 3.61 0.1 2.3 16 110 19.1 0.42 0.9 

7 22 47 2q.5 ]9-22.3 155-23.f; 9.1 1 .6 15 7'+ 3.q 0.06 o.s 

0 1 2A.8 19-22.3 155-18.4 25.7 2.0 9 146 3.4 O.6Q 1.5 

8 1 0 17.1 19-20.8 6.7 1.1 11 141 11.5 0.10 0.8 

d 1 -:i4 27.":1 19-23.9 155-1".0 5.t3 1.4 1 1.8 0.39 0.6 

8 1 36 22.<.J 155-18.4 3.2 1.3 6 213 3.1 2.9 

8 2 49 3.6 19-21.3 155-24.6 9.7 1.6 8 216 5.2 0.41 1.2 

8 4 22 34.2 19-23.4- 155-18.6 6.9 1.2 6 167 2.0 0.65 0.9 

8 4 33 57.1 19-22.9 155- 9.2 8.6 1.7 12 14S 2.6 o.Oti 1.2 

8 5 16 56.9 19-20.7 155-1"'.1 8.0 0.6 15 181 3.0 0.12 0.8 

8 5 44.3 19-23.1 155-17.9 5.4- 1 • 1 6 173 2.1 0.60 1 .1 
SUMMARY OF EVENTS (CONTINUED)

lQ70 HR SEC LAT N LONG w DtPTH MAG NO GAP DMIN ERT ERH ER

8 13 1 155-18.2 10.7 1.£0, 9 13ti 2.0 0.48 1.6 2.

13 31 2ti.8 19- 6.7 155-27.4 3.3. 1 8 275 22.7 1.27 4.9 10.

8 15 39 55.1 19-26.7 13.5 2.0 8 301 12.3 1.57 10.1 6.

8 21 51 27.7 19-28.1 155-18.1 24.4 2.1 12 154 4.6 0.11 1.0 1.

0 lA 1.1 19-17.4 155-13.R 10.5 10 248 8.0 0.32 1.8 0.

9 1 23 11 .0 19-25.b 155-14.5 10.3 1.7 B 254- 5.4 0.88 3.5 4.

9 1 35 lQ.l 1'1-19.8 155-16.6 7.5 1.0 ti 259 1.5 0.13 0.8 0.

1 37 30.7 1'l-19.4 155-16.5 1.7 0.7 8 251 2.0 0.29 1.7 0.

'oJ 2 46 51.4 1'1-23.2 154-56.3 7.5 2.1 1 233 11.0 0.48 5.0 2.

9 b 37 9.4 19-20.3 155-17.1 14.4 2.2 8 27b 4.3 0.19 2.0 0.

9 56 4.2 19-32.5 156-16.4 3.0 11 318 37.1 1.85 

9 10 21 29.3 19-21.6 1.55"12.2 S.9 9 168 3.8 1.4 1.

9 11 47 14.9 1'l-25.3 155,,17.8 4.3 1 .1 8 11q 0.4 0.40 1.8 2.

0\

0 "l 13 26 40.4 19.1 2 .1 8 235 1.2 1.3b 4.9 10.

9 14 ';}7 30.4 9.4- 1.6 12 I#.)5 3.2 O.Oij 0.8 0.

9 15 33 47.3 19-24.6 155-17.1 8.9 1.3 10 119 0.5 0.14 0.5 0.

9 17 10 6.5 19-43.3 155-25.9 21.3 2.3 15 171 6.6 0.21 1.7 2.

9 1M 32 47.A 19-22.2 0.4 3.8 2.3 14 210 16.1 0.15 1.1 1.

9 19 59 23.6 19-49.1 155-40.3 8.0· 2.6 8 177 23.2 0.01 0.7 

9 21 IB 5'5.3 19-24 ..., 155-17.7 6.'+ 1.3 7 96 0.4 0.11 0.4 0.

9 (1 3Q .1 IY-20.2 155"12.9 9.6 2.5 20 168 4.3 0.09 0.8 0.

9 23 9 50.4 •• 155-34-.7 8.9 3.0 18 124 b.2 O.Q 0.

10 0 2 34.1 19-18.9 155-!4.b 7.8 0.8 12 222 5.4 0.28 1.5 1.

10 0 q 19.3 19-21.4 155-24.9 1.2 1.8 11 114- 3.5 0.11 0.9 1.

10 1 34 44.6 155"18.2 6.9 1.2 10 98 1.4 0.2:' 0.8 1.

10 3 11 38.9 19-24.5 155-11.4 A.3 1.3 9 101 0.4 0.14- 0.6 0.

10 4 14 2.8 19-24 •.6 155-13.3 19.3 2.2 10 193 6.1 0.64 3.3 5.

l\l 5 7 24.4 lQ-24.6 155-16.A 10.7 1.6 9 lQ2 o• '7 0.13 0.5 0.

10 b 24 9.0 19-24.4 155-11.6 b.7 1.5 7 128 0.6 a.ot> 0.2 0.

10 7 14- 51.6 19-24.7 155-17.1 12.1 1.6 7 91 0.4 0.35 2.2 2.
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 kR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH 

10 1 26 35.0 19-18.1 155- 6.51 4.1 11 ·215 IJ.? 0.79 2.4 

10 10 '+2 12.9 19- ?tl 1S5-11.0 Ib.9* 2.3 14 253 0.31 2.3 

10 18 t.i 13.3 19-24.1 155-17.9 10.2 1.5 1 1 15 1.3 0.20 0.5 

10 22 5S 18.1 19-40.2 15f)" 5.3 1.2 2.9 14 262 24.2 0.62 3.1 

10 23 14 49.6 19-24.1 155-11.9 11.9 1.9 10 99 l.l 0.13 0.7 

10 23 18 25.1 . 19-24.6 A.4 1.& 8 98 0.3 0.06 0.2 10 23 55 13.9 19-16.0 154-41.b 1.20 2.6 9 316 31.5 0.82 5.2 

11 0 1 10.l 19-21.6 155-16.1 27.5 2.0 15 1. 0.13 1 • 1 

11 1 8 155-1-7.4 22.6 12 142 3.b 0.16 0.9 

11 2 25 49.4 19-18.3 1.1 1.8 11 ISO 4.0 0.16 1.3 11 3 1 14.5 19-17.8 155-16.2 1.0 10 207 7.f, 1.0 

11 J 6 30.6 19-23.9 'i.6 1.3 10 104 l.M 0.13 0.3 

11 3 2f,.6 19-21+.1 155-18.6 1.6 lu 102 2.1 0.7 

0\ 11 4- 30 24.6 19-24.4 155-17.7 9.2 1.4 6 108 0.6 0.23 0.5 

11 4- 37 32.6 19-24.3 155-16.6 1?2 1.9 11 145 1.3 0.14 0.9 

11 5 2 53.7 19-18.9 1:;5-11.5 1u.2 2.2 15 211 0.19 1.5 

11 5 46 58.9 19-25.0 155-11.8 h.4 1.1 7 104 O.H O.3l 1 • 1 

11 5 1t8 47.4 lQ-25.S 155-18.2 11.5 1.8 1 244 1 • 1 1.05 3.1 

11 6 33 33.6 19-24.b 155-17.1t- 1.8 9 95 0.3 0.08 0.3 

11 7 5 12.4 19-21.5 2B •• 2.1 13 165 1.5 0.18 1.6 

11 7 13 46.1 19-23.4 155-11.h 5.0 1 • 1 7 IS3 1.4 0.13 0.3 

11 8 45 3,.5 19-22.0 155-15.3 30.2 ?2 18 102 0.4 0.14 0.9 

1 1 tj 50 19-20.4 155-27.h 5.7 1.9 12 145 15.2 0.10 0.9 

11 10 0 36.7 19-24.2 155-11.9 9.b ?o 11 71+ l.t! 0.23 O.s 

11 10 45 34.6 155-17.5 10.4 1.7 10 101 0.7 0.5 

11 11 22 22.4 19-22.1 155-16.9 31.1 3.6 21 92 1.9 1.1 

11 15 44 19.1 19-17.6 154-59.A 1.3 2.1 7 19.5 0.16 1.0 

11 19 56 52.9 19-25.2 155- 1.2 5.5 2.3 15 181 14.5 0.11 1.1 

11 22 0 1.1 19-14.3 155-11.31 29.8* 2.3 8 231 10.8 0.52 9.9 

11 23 20 51.1 19-22.5 155-23.4 8.6 2.1 lit 119 10.5 0.10 0.9 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG DEPTH MAG NO GAP DMIN ERT ERH ER

JUN 11 23 35 18.4 19-22.5 155-26.4 8.7 1.7 14 125 6.8 0.10 0.8 0

12 0 50 10.1 19-20.°. 155-44.3? 11.1 2.4 12 160 16.2 0.10 1.1 0

12 7 18 49.5 19-24.7 10.9 2.1 13 122 8.4 0.06 0.5 0

12 10 52 5.9 19-24.4 155-28.3 8.2 2.6 16 69 11.7 0.11 0.9 1

12 11 55 52.6 19-20.8 155-52.5? 1.3- 2.8 15 207 19.9 0.21 1.5 

12 12 44 47.3 19-11.7 155-44.1 12.6 2.5 11 265 13.3 O.4t! 2.5 1

12 13 28 15.5 19-19.4- 155-14.2 10.3 1.6 14- 212 4.9 0.09 0.7 0

12 13 53 31.3 19-19.4 155-14.2 10.2 1.6 15 209 4.9 0.08 0.1 0

12 1. 18 10.3 19-10.3 155-19.8 44.1 2.6 8 269 18.5 1.80 7.5 13

12 15 18 55.8 19-20.8 155-11.4 8.8 1.8 15 191 3.1 0.10 O.Q 0

12 21 51 25.6 19-22.0 155-27.0 6.8 2.7 18 9S 7.3 O.Oq 0.7 0

13 0 32 11.8 19-19.3 155-15.8 9.1 2.0 1 7 166 3.2 0.09 O.A 0

13 5 8 4.1 19-21.6 155-15.4 ZQ.2 2.2 1,. 140 1.1 0.16 1.1 1

0\ 13 7 47 lq.3 19-23.6 155-23.0 9.q 2.5 19 71 5.8 O.Ob 0.6 0

13 7 tt9 31.6 19-20.8 155-17.9 28.8 2.1 10 169 4.6 O.2't 1.2 2

13 7 53 27.5 19-23.3 155-23.6 11 • 1 1.9 14 114 5.7 0.00 O.f. 0

13 & 33 28.8 19-12.8 155-29.3 5.9 2.2 11 230 1.... 3 0.32 1.9 1

13 8 36 45.1 19-11.1 155-34.81 8.6 2.1 7 139 8.0 0.14 2.8 1

13 10 40 24.1 19-20.1 155-12.1 9.1 2.7 18 170 4.5 0.12 1.0 0

13 18 14 14.4 18-51.1 155-14.4 8.0· 2.8 19 273 45.3 0.34 2.2 

13 19 35 38.5 19-29.5 155-43.61 1.0 2.2 7 176 20.7 1.69 3.5 8

13 20 42 12.1 19-24.8 155-22.5 9.3 2.0 15 136 5.3 0.09 0.8 0

13 23 2 q.2 19-19.1 155- 6.9 5.8 2.2 16 188 11.6 0.18 1.1 

14 6 27 42.9 19-30.8 155- 6.6 8.0· 2.2 9 193 21.3 0.32 2.7 

14- 9 14 14.8 19-11.8 155-32.8 7.4 1.9 14 143 9 •• 0.08 0.9 0

14 15 47 50.2 19-14.3 155- 1.1 4.9 1.1 14 250 14.7 0.53 2.5 1

14 23 3 8.4 19-10.5 155-34.9 8.3 7 142 9.0 0.18 1

1,+ 23 34 55.9 19-10.7 lSS-30.9 5.3 9 165 13.5 0.13 1.0 1

15 3 53 36.6 19-11.4 155-30.9 5.4 2.5 17 lSI 12.6 0.11 0.8 015 4 9 37.3 19-10.5 155-30.5 4.1 10 160 14.1 °0.12 1.0 1

' 
SUM"AAY OF SEISMIC EVENTS (CONTINUED)

1970 HR 'MN SEC LAT N LONGW DEPTH MAG NO GAP OMIN ERT ERH E

JUN 15 4 37 35.6 19-10.9 1'55-30.9 3.9· 2.2 6 164 13.2 0.15 1.2 

15 5 3 59.6 19-10.3 155-30.2 5.4 2.3 12 163 14.7 0.10 0.9 0

15 0 Jl 49.1 19-18.1 155- 6.4 4.2 3.2 18 190 8.6 0.19 1.2 O

15 11 38 36.3 19-20.6 155- 5.6 4.5 2.4 16 183 17.2 0.16 1.2 015 18 40 8.1 19-23.7 155-17.1 2.6 0.8 9 132 0.8 0.04- 0

15 18 44 35.0 19-18.7 155-13.5 10.5 1.8 15 198 6.5 0.11 0.8 0

15 19 34- 27.5 19-20.8 155-13.9 8.2 1.5 15 180 3.0 0.12 0.9 0

21 51 22.5 19-23.4 155-25.2 10.9 12 76 6.a 0.06 0.6 0

15 22 21 53.2 19-23.1 155-26.8 8.5 2.5 17 75 8.1 0.7 0

15 23 34 15.2 19-23.9 155-35.7 9.2 2.3 10 191 16.7 O.ll 0.8 0

15 23 39 58.2 19-23.1 155-25.4 9.9 2.4 17 78 6.6 0.09 O.A 0

16 0 44 0.0 19-23.9 155-17.3 1.9 0.7 6 127 1.3 0.06 0.2 0

lb 7 1- 0.1 19-23.5 155-17.1 2.4 1 140 0.5 0.2 0

0\

w Ib 7 18 7.1 19"23.4 155-17.2 2.3 0.9 8 144 0.1 0.02 0.1 0

16 10 35 7.3 19-23.8 155-17.3 2.3 1. 1 10 112 1.2 0.04 0.2 0

16 18 13 9.6 19-29.3 155-45.8 6.4 2.9 16 205 30.1 0.21 1.5 

lb 23 '+1 2.6 19-18.8 155- 8.41 10.6 1.9 13 ?21 6.1 0.29 2.0 0

11 0 S8 23.6 19-15.8 155-13.5 8.7 2.4 16 186 11.6 0.20 1 .1 0

17 0 59 24.1 19-19.5 155-13.9 11 .1 1.7 13 110 5.0 0.10 1.0 0

11 21 7 33.1 19-18.5 155-13.8 11.6 1.7 17 173 6.6 0.07 0.7 0

11 2 18 49.1 155-25.0 8.8 1.7 10 162 4.9 0.10 O.A 011 2 40 27.3 19-22.8 155"16.2 34.0· 2.3 10 lZ6 0.9 0.04 l.a 

17 5 44.5 19-23.6 155-17.1 25.7 2.1 8 108 1.6 1.24 2.7 1

11 6 10 42.4 19-19.6 155-25.4 S.8 2.3 14 128 0.07 0.6 0

17 6 23 2.3 19-19.4 155-25.3 6.5 2.5 17 129 12.b 0.07 0.6 0

17 9 26 7.9 19-19.5 155-16.3 69.5* 11 188 2.2 0.01 3.0 

17 10 55 12.3 19-11.2 155-28.8 9.6 9 173 16.1 0.09 0.9 0

17 12 23 46.9 19-22.6 155-16.4 33.7· 2.3 10 119 1.6 0.05 1.9 

17 14 57 31.8 19-19.0 155-24.5 8.6 3.4 22 136 3.0 0.08 0.7 0

11 16 29 54.9 19-24.3 155-35.1 8.7 2.8 12 134 17.1 0.13 0.9 0
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH ER

JUN 17 17 26 44.9 19-22.2 155-11.6 9.7 1.6 15 127 1.7 0.09 0.9 0

17 17 S3 21.2 155"10.6 9.7 2.2 11 194 3.3 0.13 1.2 0

17 20 45 7.7 19-24.6 155-21.7 16.6 2.0 5 140 3.8 0.0 

17 lU 58 17.8 19-17.1 156-27.7 8.0· 2.2 8 298 52.4 1.90 11.8 

17 21 34 40.5 19-29.5 155-45.9 6.5 3.2 17 120 16.8 0.10 0.9 1

18 2 30 18.0 19-22.5 155-10.7 9.7 2.4 11 128 1.8 O.O'+- 0.5 0

18 12 22 39.1 19-21.5 155-26.8 3.5· 1.8 11 146 13.1 0.15 1.1 

18 13 43 12.0 19-20.4 155-29.8 9.0 2.5 9 115 lb.3 0.07 0.7 018 lit 39 39.8 19-26.4 155-34.4 14.50 2.1 10 181 20.4 0.10 0.9 

19 1 35 56.1 19-18.8 155-16.4 7.3 1.9 16 168 5.9 0.12 0.9 0

19 3 33 23.0 19-11.3 155-34.5 8.3 7 145 8.1 0.17 1.9 1

19 12 44 29.5 19-50.3 1!>4-S9.3 8.0· 2.6 12 297 40.9 0.78 5.0 

19 13 42 2q.3 19-22.& 155-23.5 10.1 10 113 4.4> 0.12 1.3 1

0\ 19 17 21 7.4 19-20.4 155-13.6 10.2 2.0 lb 164 3.9 0.07 0.1 0 

19 19 14 51.5 19-47.1 155-33.41 2... 9- 10 268 10.8 0.19 1.5 

19 20 44 33.9 19-21.2 155--25.2 6.9 2.2 16 114 10.7 0.01 0

20 It 0 21.9 19-22.4 155-2.5.7 6.0 1.9 14 102 10.7 0.10 0.9 0

iO 6 4 1.0 19-20.6 1S5- 4.5 4.3 3.0 18 181 9.9 0.18 1.3 0

20 16 59 11-5.1 19-25.0 155-28.1 6.3 2.3 11 183 12.2 0.15 0.9 0

20 22 33 31.1 19-21.7 155- 8.4 5.3 2.2 16 173 7.3 0.15 1.1 1

21 7 3 53.4 19-17.1 154-53.1 7.7 2.4 11 280 20.8 0.73 4.0 1

21 19 21 51.4 19-22.9 155- 1.7 1.2 2.1 11 201 11.5 0.63 1.0 3

21 23 3(- 44.7 le,J-12.6 155-20.1 34.1 1.9 11 194 15.1 0.31 1.4 .2.

21 23 49 50.7 19-22.9 155-22.9 <J.4 2.0 14 111 5.1 0.01 0.7 O

22 2 14 30.5 19-23.5 155- 0.0 2.1 14 178 17.8 0.39 0.8 2

22 4 S3 44.8 19-18.5 ISS- 0.6 1.5 8 242 22.4 1.29 4.8 5

22 12 38 42.1 19-22.5 155-25.7 10.3 4.2 17 130 6.0 0.12 0.9 0

22 13 32 39.4 19-22.0 155-24.8 11.0 2.3 15 115 4.1 0.09 0.8 0

22 13 34 12.5 19-21.9 155-25.2 10.2 2.0 12 118 4.7 0.07 0.1 0

22 15 45 58.1 19-21.0 155-16.8 26.8 2.0 8 110 7.0 0.19 1.0 1

Ie 
SUMMARY Of SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

jUN 22 11 35 30.3 19-19.5 155-24.9 45.1 2.4 16 130 3.1 0.28 1.2 2

22 18 49 49.7 19-37.2 156-11.6 8.0· 2.4 14 302 73.1 1.08 6.6 

22 19 46 43.1 19-22.2 155-25.4 6.3 2.5 22 75 5.2 0.10 0.8 0

22 21 40 42.4 19-25.1 155- 1.5 1.1 2.2 14 181 15.0 0.54 1.0 322 23 32 4.7 19-17.9 155-25.4 6.6 1.9 10 148 14.6 0.11 1.1 1

23 0 43 2.A 19-19.9 155-16.0 9.6 1.7 14- 158 2.4 0.07 0.7 0

23 1 0 58.3 19-23.8 155- 6.2 2.4 2.5 16 167 11.2 O.4b 1.1 2

23 1 56 12.2 19-20.5 155-15.5 28.1 2.3 20 154 2.5 0.10 0.7 1

23 2 16 51.1 19-20.1 155-15.8 28.0 2.3 17 150 2.2 0.11 0.9 1

23 4 5 57.4 19-18.3 155- 7.0 3.5 2.1 1_ 212 12.4 0.31 1.8 1

5 1 14.1 19-21.3 155-13.7 9.9 1.7 17 150 2.9 0.08 0.8 0

23 6 53 6.3 19-25.6 155-14.8 26.0 1.2 11 4.9 1.0 1

23 9 54 56.7 19-18.6 155-14.6 8.5 2.1 16 180 5.6 0.14 1.0 0

0\ 23 16 54 57.6 19--23.4 154-59.21 8.0· 2.0 11 213 13.b 1.72 11.5 

U1

23 17 26 35.6 19-22.0 155-12.6 10.2 1.6 13 152 0.9 0.05 0.6 0

24 3 34 3R.8 19-20.9 155-16.5 31.1 1.5 11 146 2.7 0.14 0.9 1

24 4 10 21.3 19-20.5 155-28.4 9.5 2.2 14 112 9.0 O.Ott o.e 0

24 6 54 40.4 19-21.4 155- 6.2 3.'+ 1.8 13 200 15.9 0.18 1.4 1

24 12 28 48.7 19-20.6 155-11.8 10.5 2.0 12 202 3.8 1.5 0

24 22 40 9.7 20- 2.8 155"22.4 8.0· 2.5 15 30. 31.0 0.85 5.3 

25 2 31 29.1 19-10.8 155-33.7 8.5 9 137 9.7 O.lJ 1.5 1

25 5 28 24.1 19-26.4 155-22.2 9.1 2.2 18 68 3.5 0.05 0.5 025 5 50 52.1 19-24.4 155-25.4 8.5 1.9 13 127 8.1 0.08 0.7 0

2S 14- 2Q 13.4 19-22.9 155-24.4 10.0 1.3 13 118 5.4 0.06 0.6 0

25 15 43 51.9 19-22.4 155-23.2 8.3 1.5 7 177 4.0 0.66 1.5 4

25 21 8 38.8 19-21.7 155-12.1 9.1 2.2 15 146 3.6 0.08 0.1 0

26 4 24 45.0 19-15.6 155-13.7 6.4 1.7 6 267 11.8 0.89 . 4.2 2

26 1 12 42.1 19-22.6 155-.10.9 9.5 1.5 8 140 2.1 O.Oq 1.3 0

26 8 20 38.6 19-23.6 155-20.1 13.9 2.0 7 113 5.0 0.17 0.4 1

26 16 23 57.4 19-27.0 154-53.9 7.9 2.0 9 226 2.9 0.33 4.0 1
OF SEISMIC E\I TS (CONTINUED)

19-( 0 HR tvtN SEC LAT N LONG,W Dt:.PTH MAG NO GAP ERT ERH ER

JlJN 26 17 [12 40.5 155- 6.4 4.7 2.5 18 187 12.1 0.24 1.7 1.

26 22 511 2?2 20-41.1 8.00- 3.1 19 330 75.1 2.06 12.2 

21 14 52 12.4 19"20.8 8.4 2.1 lit- 136 4.• 1 O•. 1.1 1.

/27 17 17 6.2 19-14.6 155-25.2 37.6 2.6' 20 158 10.8 0.19 1.1 1.

21 19 41 20.2 lCJ-25.2 155-16.R 5.6 2.0 10 210 1.4 0·.25 1.3 1.

0 2n 4h.l 19-?2.3 155-11.] 10.2 1.9 17 126 2.1 0.08 0.9 0.

211 1 :i ti 43.4 19-15.5 41.1 2.3 11 160 8.8 0.40 1.9 3.

29 J Ib 51.8 'lSS- 1.8'? 0.0 2.1 14 188 15.0 1.1 1.

12 21 11.7 19"21.1 1=>5-17.8 21.4 2.1 1.. 13 2.1 0.13 0.7 1.

29 22 40 5S.0 19-21.6 155-25.0 7.5 1.8 13 138 10.1 0.08 0.6 0.

l.9 22 4lf. 28.6 19-19.3 155-23.4 5.0 1.5 8 179 1.6 0.19 1.5 1.

30 C 17 40.0 19-20.9 155-11.7 7.9 1.7 11 173 3.2 0.18 1.4 1.

30 1£+ 12 21.3 155-l4.8 7.1 1.5 11 1.37 9.6 0.11 O.A 1.

0'

0'\ 30 1- 53 30.1 1,9-23. 155-28.3 q.5 1.6 12 138 15.1 O.O<J 0.8 0.

30 15 4 2A.3 19-15.0 155-20.2 24.3 2.1 15 179 10.6 0.17 1.0 1.

30 18 52.2 19-24.4 155-11-.61 0.1 0.6 9 95 0.7 0.14 0.6 4.

30 18 23 30.Q 19-22.2 155-12.7 b.9 1.6 14 14ft. 0.6 0.08 0.7 0.

30 c2 ly .30.9 19-24.4 155-15.6 3.4 0.6 7 235 Z.5 0.4 0.
Table 3.--Felt Earthquakes*

Time

Date H M S Magnitude Felt Report

Apr.9 16 46 19.0 2.9 Kealakekua

12 09 13 43.7 4.3 Hilo, Pohakuloa, Kapapala

Ranch

14 11 07 57.4 3.6 Volcano

16 02 25 33.5 3.2 Kapapala Ranch

17 12 12 13.6 4.2 Holualoa, Kealakekua

19 05 30 38.8 3.2 Kapapala Ranch

28 15 23 05.3 3.5 Pahoa

30 06 07 01.6 3.9 Hila, Volcano, Mt. View

Kapapa1a Ranch, Ka1apana,

Paauilo

May 1 06 31 17.5 2.1 Naalehu

1 09 00 59.2!-1 . 3. 7 Kamuela

2 08 47 33.9 3.0 Rile

6 06 21 38'~7 3.2 Hi10

8 20 27 05.8 2.3 Kapapala Ranch

10 05 30 '53.2 4.1 Hilo, Volcano, Mt. View,

Kalapana, Paauilo

13 15 12 57.1 3.2 Kapapa1a Ranch

15 04 56 28.9 2.7 Volcano

15 05 12 20.4 2.7 Volcano

15 05 55 57.9 3.2 Volcano

15 06 52 15.4 3.0 Volcano

15 11 04 26.5 3.8 Hi10

15 11 09 21~2 2.6 Volcano

15 23 59 49.3 3.6 Volcano

Jun 10 22 55 18.7 2.9 Kealakekua

11 11 22 22.4 3.6 Kapapa1a Ranch

15 22 27 53.2 2.5 Kapapala Ranch

17 14 57 31.8 3.4 Kapapala'!Ranch

22 12 38 42,.1 4.3 Hilo, Kapapa1a Ranch

Mt. View, Kealakekua

'Ie Acknowledgements: Several people felt 'earthquakes during the second

quarter of 1970 and reporte,d their observations, to HVO; that information

is gratefully acknowledged.

11 Kawaihae Harbor blast.

67
+

.

b

<.71

<.71

.

W

o

o

19 3q .0

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+

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. + Magnitude +

•• Symbol Interval + .....

• 4.0 < M • 5.0 (J'1

<J1

X 3.0.< M .4.0 en

+ 2.0 < M 3.0 0

• M.2.0

19 10 .0

• •. + ..*

x

+

+ .

+

+

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..

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.. .

. ...-. . +-

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+

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+

.... +

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+.. • A' :.. ..... .. .... ... ... . - I ... .. . ..+ . +. . • + .+ li .:.. ~~. A.r..._ . •• +'X + , .~ •• ~A

.+ + ·+··t .~ ...+ .. -#.f... • of: •..- •• •• + ••••: • •••• ....' • .-fa .... • • .. . . ++. ...:.... i:. . • •••• : A+.+ •• .: +.. : · + .~. . +. + •

••:-:-.,;.... A..~ • •• • • · •• : •. -- I .:.

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01

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1·9 10 .0 5 Kin. +

-- +

Figure 2.• --Plot of epicenters .1n the Kilauea region. Triangles are

seismometer' locations. Kilauea Caldera and the major pit craters

on the "east rift are shown in outline. The Pacific Ocean 11e8 in

the lower right portion of the illustration.

68
--------

10 .01 Io' ~----:;:"'-_-~----r---~---..,.-----r-----.,r-----,-----,

I

Frequency (Hz)

10 100

Figure 3.--Response curve for System II, EV-17 , Teledyne seismic

preamplifier.

69

Table 5.--Seismic Instrumentation

1. Seismometers

EV-17 :

EV-17H:

HS-lO:

HVQ-2:

2. Seismographs

HVO-l:

15-90:

Electrotech EV-17 1.0 sec. period moving magnet vertical

component seismometer.

Same as above, but horizontal component.

Hall-Sears 0.5 sec. period moving coil seismometer.

0.8 sec. period moving coil seismometer.

Vertical-component electromagnetic seismograph with a

peak magnification of about 20,000 at 0.25 sec. period.

Press-Ewing System: 3-component long-period Press-Ewing

seismograph system with pendulum and galvanometer periods

of 15 and 90 seconds, respectively.

EV-17/3.5 cps galv, EV-17H/3.5 cps galv, etc.: Short-period electromagnetic seismographs composed of the seismometers and

galvanometers indicated. Response similar to HVO-l.

Poorly calibrated.

3. Amplifier and Signal Transmission Systems

System I:

System II:

HVO-built solid state seismic preamplifier (voltage gain,

200X) , direct signal transmission over "hard" wire to

HVO-built solid state amplifier and galvanometer driver.

Develco or Teledyne seismic preamplifier--voltage controlled

oscillator, signal transmission on audio FM carrier over

"hard" wire or FM radio link to HVO discriminator.

,.

Geotech PTA: Short-period Geotech photo-tube amplifier.

4. Timing Systems

i

RM-USGS:

TS-lOO:

Crystal-controlled chronometer employing solid-state

binary dividers to produce minute and hour marks;

typical drift rates are a few milliseconds per day.

Sprengnether crystal-controlled chronometer; output and

performance characteristics are similar to those of

RM-USGS.

71
5. Telemetered System Res~~~~

The peak magnification of the standard telemetered

systems (System II, with the film strip magnified

20 times for viewing) is about 2 x 105 at a period of

0.1 second. For periods between 0.1 and about 1.0

second, the response falls off 6 db/octave. (fig. 3)

72

•
•

,

TILTING OF THE GROUND AROUND KILAUEA CALDERA

Tilting of the ground around the summit of Kilauea is monitored daily

by a short-base water-tube tiltmeter in the Uwekahuna Vault; weekly results

are summarized in table 6. At irregular intervals, tilt is measured on a

regional scale by means of a network of field tilt-bases and a portable

water-tube tiltmeter. These results are sumrnarizpd in table 7. The attitude

of the ground surface at each tilt-base is reported in terms of north-south

and east-west tilt coordinates. Both coordinates at each station were

arbitrarily set equal to 500 when measurements at that station were begun.

Increasing tilt coordinates co~respond to northward and eastward tilting

of the earth's surface; that is, to a relative subsidence toward the north

and east. A one-unit change in coordinate corresponds to a tilting of

1 microradian (1 mrn per km) in the direction indicated.

Location of tiltmeter stations and essential data on each station

are listed in table 8.

Table 6.--Ti1t Coordinates at Uwekahuna Vault

April, May, and June 1970

Date N-S E-W Date N-S E-W

Apr 5 561 376 Jun 7 557 382

12 561 381 14 557 383

19 561 379 21 557 383

26 562 375 28 558 381

May 3 561 375

10 560 380

17 556 385

24 557 382

31 557 382

73
Table 7.--Tilt coordinates and rate of changes at bases around Kilauea Caldera 

-6 Tilt Coordinates Rate (10 rad/mo) and

Date Direction of Tilting Dat

Tilt Base (1970) N-S E-W Since Last Reading Rea

Uwekahuna (U on fig. 4) 22 May 619.6 344.4 6.67 N43'.3°W 27 

Tree Molds (TM) 18 May 490.8 495.6 1.58 N 2.7°W 9 

Sand Spit (SS) 20 May 1039.9 602.1 18.27 N35.9°W 31 

Keamoku (Kea) 20 May 541.6 367.7 4.20 N32.9°W 11 

Ahua Kamokuko1au (Kam) 21 May 330.0 509.8 18.07 SI4.2°W 31 

Kipuka Nene (KN) 21 May 291.6 505.6 1.36 S26.1oW 13 

Hi1ina Pa1i (HP) 25 May 452.0 492.0 0.39 S84.5°W 29 

Kapapala Ranch (Kap) 20 May 486.3 518.8 0.47 SI9.2°W 11 

Mehana (M) 18 May 588.7 594.0 3.61 N36.2°E 9 
•

/

o

Kap

,

cr

o

~~---'

2000~~ Tilting rate 5.0 x 10-6 radians/month

00

5KM

N

I

Figure 4.--Tilting of the ground around Kilauea Caldera. Time interval

between measurements is given_ in table 7. Vector depicting tilting

at a given tilt base points in the direction of maximum relative

subsidence and has a length proportional to the rate of tilting

during the measurement interval. Closed circles represent field

tilt bases; open circles, short-base water-tube tiltmeters. See

table 8 for explanation of abbreviations.

75
Table 8.--U.S. Geological Survey water-tube ti1tmeter stations in Hawaii

Location Frequency Base

of Length

Station Symbol Lat N Long W Reading M Description

Tree Molds TM 19°26.3' 155"17.3' Approx. 50.79 NS and EW

Quarterly

Sand Spit 55 19°24.1' 155°16.8' " 25.40 Equilateral

Triangle

Keamoku Kea 19°25.1' 155°19.0' " 47.55 "

Ahua Kamokuko1au Kam 19°22.7' 155°16.6' " 50.79 "

Kipuka Nene KN 19°19.4' 155°16.7' " 50.79 "

Hilina Pa1i HP 19°18.2' 155°18.6' " 47.73 "

Kapapala Ranch Kap 19°20.5' 155°23.8' " 50.79 "

Mehana M 19°26.2' 155°14.3' " 25.00 "

Uwekahuna U 19°25.5' 155°17.4' " 50.79 "

Uwekahuna Vault 19°25.4' 155°17.6' Daily 3.48 NS and EW

76

'-----------------
•

References Cited

Eaton, J. P., 1962, Crustal structure and volcanism in Hawaii:

Am. Geophys. Union Geophys. Mon. 6, p. 13-29 .

Endo, E. T., 1971, Focal Mechanisms for the May 15-18, 1970

Shallow Kilauea Earthquake Swarm, M.S. Thesis, San Jose

State College, San Jose, California, 150 p.

Hamilton, R.M., Smith, B. E., Hall, J. C., and Healy, J. H., 1969,

Summary of seismic activity in the Pahute Mesa area, Nevada

Test Site, Dece~)er 1968 - June 30, 1969: u.S. Atomic Energy

Carom. (USGS-474-S8): Springfield, Va., Clearinghouse for

Federal Sci. and Tech. Info., 63 p.

Swanson, D. A., Jackson, D. B., Duffield, W. A., and Peterson, D. W.,

1971, Mauna Ulu eruption, Kilauea Volcano: Geatimes, v. 16,

no. 5, p. 12-16.

77
UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

SUMMARY 59

July, August, and September. 1970

by Elliot T. End~, Robert Y. Koyanagi

and Arnold T. Okamura

Issued

OBSERVATORY STAFF

Geology

W.A. Duffield

D.W. Peterson (Scientist-in-Charge)

D.A. Swanson

Geophysics

K.T. Honma

D.B. Jackson

George Kojima

R.Y. Koyanagi

A.T. Okamura

Geochemistry

R.T. Okamura

Support

J.C. Forbes

W.H. Francis

J.B. Judd

M.S. Onouye (Mrs.)

M.K. Sako

Akira Yamamoto

~/ Office of Earthquake Research and Crustal Studies, Menlo Park, Calif.
CONTENTS

Page

•

Summary of Principal Events ••

Seismic Summary .•.

Tilting of the Ground Around Kilauea Caldera

References

Illustrations

1

3

37

40

Figure 1.

2.

Epicenter Map .

Response Curve for System II, EV-17,

Teledyne Seismic Preamplifier . • . .

32

33

3. Tilting of the Ground Around Kilauea Caldera. 39

Tables

Table 1. Number of Earthquakes and Minutes of Tremor .

2. Summary of Seismic Events •

4

8

3. Felt Earthquakes. • . . . • 31

4. U. S. Geological Survey Water-Tube Tiltmeter

Stations in Hawaii. • . 34

5. Seismic Instrumentation 35

6. Tilt Coordinates at Uwekahuna . 37

7. Tilt Coordinates and Changes at Bases Around

Kilauea Caldera • • . . • • • • . . • • 38
•

SUMMARY OF PRINCIPAL EVENTS

The Mauna Ulu eruption (Swanson and others, 1971), which began on May

24, 1969, on the upper east rift, continued throughout the summary period.

However, the focus of activity shifted from the summit of Mauna Ulu, where

it had been during most 'of the eruption, to a set of new vents east of

the sununit.

On July 6, a swarm of small earthquakes preceded the opening of a

new fissure about 150 m northwest of Alae Crater. Lava fountained from

a "curtain of fire" about 200 m long, and flows advanced southward into

Alae and eastward for about 3 km. Eruption at a reduced rate continued

from three vents along the new fissure until July 9, and similar episodes

of fountaining from the same vents took place on July 13 - 15, 16 - 17, and

20 - 21, and at several times during early August.

During this activity, the walls of the summit fissure of Mauna Ula

sporadically caved in, eventually yielding a large pit with overhanging

walls. A pool of lava occupied the pit. The level of this pool fluctuated

between 25 and 35 m below the rim throughout the summary period, with no

overflows taking place. Lava in the pool was in constant circulation

generally but not always moving eastward along the 120 m length of the

fissure.

A small vent opened on August 3 about 150 m east-northeast of the

summit pit. Most activity was confined within the new fissure itself, but

periodically lava spilled out onto the ground surface, forming small flows,

the largest of which extended about I km from the vent.

Another new vent about 650 m east-northeast of the summit of Mauna Ulu

opened sometime between August 4 and 7, probably on August 6. The new

activity was not accompanied by any detectable change of seismicity or

summit tilt. Lava welled quietly from the vent, flowed in a surface river

for 50 to 100 m, and then disappeared into a tube (formed by crusting over

of the river) which carried the lava for several tens of meters before

feeding it beneath the crust of the lava lake in Alae Crater. Increased

fluid pressure within the lake eventually broke a barrier that sealed an

older tube leading out of the south rim of the filled crater, and lava

poured from the lake through this outlet, finally emerging as a surface

flow about 2.5 km southeast of the crater. This draining removed support

for the lake crust, which subsided a maximum of 13 m between August 8

and 11. Details of this subsidence episode are given by Swanson and

Peterson (1972) and Swanson and others (1972).

Lava continued to erupt from the August 6 vent and other nearby areas

for the remainder of the summary period. Most of this lava flowed into

and out of Alae through the tubes, feeding a flow south of Alae that slowly

moved seaward as it developed and lengthened its complex tube system. The

development of this tube system is described by Swanson (1973) and Peterson

and Swanson (1973). The lava remained in tubes along the upper part of its

course, but a complex braided pattern of tubes and surface flow units
marked the descent over Poliokeawe, Holei, and Kealakomo Palis. Lava

flowing in tubes hidden from view was detected by electromagnetic surveys

(Anderson and others, 1971). The tube-fed flow eventually reached the

coastline on September 21, but the volume of lava was so small that

only small toes entered the water. This flow stopped moving on September

26, apparently because of obstructions that developed in the tubes just

south of Alae. These obstructions were only temporary, however; and on

October 1, surface flows again began issuing from tubes about 2 km south

of Makaopuhi Crater.

This three-month period ushered in a new phase of activity for the

Mauna Ulu eruption. From this time until the end of the eruption in the

fall of 1971, surface activity was concentrated east of Mauna DIu's summit

crater, which last filled to overflowing in June 1970. The tube system

through Alae that developed in August 1970 was maintained, with some

periods of inactivity, until late spring of 1971. It is interesting that

despite this marked change in eruptive behavior the seismic and tilt

behavior remained essentially unchanged.

2
SEISMIC SUMMARY

Events recorded by the U. S. Geological Survey seismograph network

in Hawaii fall into two categories:

1) Local earthquakes and tremor originating in the region of the

Hawaiian Islands (usually within 10 krn of at least one seismometer),

2) Distant earthquakes originating more than 3,000 km from Hawaii.

As an index of seismic activity at Hawaiian volcanoes, daily counts of

the number of earthquakes and minutes of tremor recorded by seismographs

in Hawaii are listed in Tab.le I.' The earthquakes are separated into

groups on the basis of region of origin as determined by the analysis

of records obtained daily at the Observatory (UWE, MLO, MLX, AHU, DES,

NPT, WPT, MPR, OTL).

Computer locations of well-recorded events are listed in Table 2.

The location of each seismograph station is listed in Table 4, along

with a description of the equipment at each station.

3
Table 1.--Number of earthquakes and minutes of tremor recorded on seismographs aroun

Kilauea Caldera

Tremor is separated into three categories: deep, intermediate, and shallow, on the basis 

amplitude on seismographs in the summit region. Unless otherwise stated, tremor is pres

associated with movement of magma within the central complex of Kilauea Volcano.

Earthquake categories are: Kilauea Summit: 30 km, earthquakes from a source about 30 km 

Kilauea summit region; long-period, earthquakes characterized by low-frequency waves th

about 5 km or deeper beneath Kilauea summit; and shallow earthquakes in the Kilauea Ca

Shallow earthquakes along the SW ri.ft zone of Kilauea and the adjacent portions of the K

system. from the upper east rift zone and the adjacent fault systems of Kil

flank. Shallow earthquakes along the northeast-trending Koae fault system south of Kila

Earthquakes from other regions, such as, west Hawaii, Mauna Kea, etc.

Tremor Number of Earthquakes

Date (m - minutes) Kilauea Sunnnit 1/ . 2/ (1970) SW Rift Upper-' LowerInter- Long and East East

Deep mediate Shallow 30 KM Period Shallow Kaoiki Rift Rift Other

Jul 1 2 51 931 16 37 30

2 0M 168 11 6 27

3 0 2 1 167 12 10 31

4

+oJ 0 2 256 12 14 88

5 Q) Q) +oJ +oJ 3 940 15 129 31 

m.,...

H co 

Q)

"t:J OJ 

o > +oJ 

6 31m +oJ"'" S Po. H 2 53 12 12 21

7 o =' H H +oJ 2 34 12 11 12

8 30m Q) enm 5 81 14 14 11

9 d m 1 109 10 11 12

10 ·M QJ H +oJ Q) 2 101 9 10 10?

11 m p. ::s CJ) Po. 2 60 18 5 9

12 15m +oJ ...... =' U QJ 3 195 19 13 16

13 =' > OJ M OJ..c: 127 19 11 7
Table 1.--Number of earthquakes and minutes of tremor recorded on seismographs arou

Kilauea Caldera (cont'd)

Tremor Number of Earthquakes

Date (m • minutes) Kilauea Sunmit 1/ 2/

(1970)

SW Rift UpperInter- Long and East East

Deep mediate Shallow 30 KM Period Shallow Kaoiki Rift Rift Oth

Ju1 14 40m

3 ? 86

9 10 12

15

4 ? 101

7 14

4

16 1 15? 165 10

7

4

17

3 37 43

6 11 15

18 5 98 35 11

8

9

19

2 42

5 5 4

20 48 11 14 151?

21

4 12 151 10 22

5

22 .a.J 1 14 145

8 12

3

23 .,..

4 5? 86 15

4

5 1-1

24 .a.J 1 7 203 15

7 3

25 1-1 rn

2 9 325 15 9?

2

26 QJ <U

4 27 210 11 10 1 c::

27 1-1

3 174 11 11

7 rn <U

28 1 143 19 17

9

Q)

29

> :;j 1 181 18 25

9 Q)

30 r-I Q) 1 193 9 19

2

31 48m 3 219

8 18 2 0

r-I c::

0

Aug 1 3m .a.J

m 1 2 2025 15 48 11 <U

2 3m .I-J 3 29 69 21 18 2 bO-r4

3 c:: rn 3 8 37 10 13 5 erot

4 +J Q) 3 2 53 19 14

4

m

>

5 =' er-f

3 45 16 22

5

+J"-J

6 CJ ? 54 9 22 8 :;j ='

7 rl 1-1

4 110 12 15 1 P:.t Q)

8 3 3? 115 9 17

7

9 1 13 148 16 13 5
10 3 85 9 ,10 1

11

2 88

8 15

6

12

2

2 107

7 19 1

13 104 10 23

6

14 41 15 14

15

3 96 17 14 3

16 1 81 23 15 3

17

6 199 18 ·24 1

18 3 71 145

9

4 1 

19

4 3 110

5 17 1

20

2

7 92. 13 16 1

21

4 24 107 9 14 3

22

u

2 19 122 15 10 3 I-f co

23 qS as 1 5 212 1.3 10 3 OJ Q)

24 d 311 16 12 3

25

m Q) 1 220

3 1 1 MP-.

26 Q) p. 1 ? 1 ? ? 1 

> ::1 Q) 

M Q)

27 )£ 1 10 9 ?

28 0 2 ? 15 27 ? M

29 0 1 148 18 31 1 +J

30 eu Q)

2 135 11 24 ? +J

31 bO er-t 5 139 3 21 3+ d U) eM

+J Q)

Sep 1 eu

> 134

8 17

2

;j-r-l

2 +J+J 1 133 12 13 3 CJ p.

3 ;j ';j

2 264

4

7

4

M

4 Q) 1 3 221

7 9 4

5

2 5 55? 15

7 1

6 1 144 12

8 1

7

5 31 295 20 3 4

8 20m

2 284

7

9

2

9 5m

2 245

6 18

4

10 1 1 140

4 12 6

11 1 2 308 25 11 5
It

Table 1.--Number of earthquakes and minutes of tremor recorded on seismo$raphs arou

'Kilauea'Caldera (cont'd)

Tremor Number of Earthquakes

Date (m = minutes) Kilauea Sununit upper!.! LowerJ:-I (1970) SW Rift Inter- Long and East East

Deep mediate Shallow 30 KM Period Shallow Kaoiki Rift Rift Oth

12 12m 4 7 294 34 20 6

13 ,&-J 3 7 341 38 22 2

14 3 292 38 34 ? .,... 3

15

,...

2 288 20 29 2

16 ,&-J 324 27 12 7 ,... CI) 1 ctS ctS 17 Q) QJ 286 28 7 1

18 40m d 4 313 20 9 ,...

CD Q) 19 r-t Po. 4 237 20 17

20 OJ p.. > ::s 6 266 19 46 7

21 OJ r-t QJ 6 223 29 34 4

22 )Z 4 2 193 16 26 6 0 23 r-t t:: 3 227 21 25 2 0 24 ,&-J 1 3 176 29 16 2 ctS Q) 25 ,&-J 2 5 189 25 31 2 bO..-f

26 8m d CD 5 1 478 39 28 1 -rl

27 ,&-J Q) 1 4 1851 46 52 4 Cd :> 28 6m :s er-f 9 16 1089 29 62 6 ,&-J,&-J

29 (J p.. 2 437 26 32 3 :s :s

30 r-I J...4 7 277 25 36 3 Q)

!I Upper east rift count 'poor due to continuous tremor and traffic.

Count taken from station Puu Honuau1a (PHO).
...-

Table 2 is a chronological listing of successfully located earthquakes.

For each event the following data are presented:

Origin time in Hawaii Standard Time: date, hour (HR), minute (MN),

and second (SEC).

Epicenter in degrees and minutes of north latitude (LAT N) and west

longitude (LONG W). Poor convergence of the epicenter solution is

indicated bY"?".

Depth depth of focus in km. Assumed depth is indicated by "x".

Mag - magnitude, if determined.

NO - number of stations used in locating earthquakes.

GAP - largest azimuthal separation in degrees between stations.

DMIN - epicentral distance in km to the nearest station.

ERT standard error of the origin time in seconds.

ERR standard error of the epicenter in km.

ERZ - standard error of the depth in km.

MD - mean deviation of the time residuals. [= t Ri/NOJ where

R. is the observed seismic wave arrival time less the computed time at

1

the i th station.

Q - solution quality ,of the hypocenter. This measure is intended

to indicate the general reliability of each solution:

Epicenter Focal Depth

A Excellent Good

B Good Fair

C Fair Poor

D Poor Poor

Q is based both on the nature of the station distribution with respect

to the earthquake and the statistical measures of the solution. These

two factors are each rated independently according to the following

scheme:

8
Station Distribution

NO GAP DMIN

A > 8 < 1200 .2 Depth or 5 km

B > 6 < 1500 2 x Depth or 10 km

C > 6 < 225 0

< 50 km >4 <1800

D Others

Statistical Measures

ERR (km) ERZ (km) MD (sec) RMAX (sec)*

A < 1.0 < 2.0 .< 0.10 < 0.25

B < 2.5 < 5.0 < 0.20 < 0.50

C < 5.0 < 0.30 < o. 75

D Others

Q is' taken as the average of the ratings from the two schemes; that is,

an A and a C yield a B, and two B's yield a B. When the two ratings are

only one level apart the lower one is used; ~hat is, an A and a B yield

a B (Hamilton and others, 1969).

The criteria for Q are the same as used by the Office of Earthquake

Research and Crustal Studies, U.S. Geological Survey.

* ~X is the maximum residual

9
SUMMARY ()F SEISMIC EVEi'iTS

1970 HR MN SEC LAT LONG W DEPTH Ml\G NO GAP OMIN ERT ERH 

JUL 1 3 11 1·.3 • C) 19-24.2 It)4-58.6 4.7 1.9 11 205 11.8 0.12 0.9 

1 5 23 43.0 19-11.2 155- 6.3 4.8 2.5 17 199103.4 0.30 1.6 

1 6 22 46.6 19-24.3 155-15.6 3.8 1.0 6 239 2.6 0.28 1.1 

1 6 24 34.7 19-23.6 155-16.11 3.3 1. 1 9 119 0.4 0.10 0.7 1 10 5 26.1 lQ-?5.0 155-25.4 10.8 1. 8 13 198 9.6 0.12 0.8 

1 13 8 57.9 19-26.7 155-13.7 26.0 2.3 21 59 6.7 0.10 0.7 

l 18 58 42.9 19-24.6 155-17.41 0.1 0.8 9 88 0.2 0.11 0.8 

1 20 36 30.2 1 tJ-13. 4 155-14.8 4.1* 1.9 7 336 15.6 0.82 5.0 

1 20 58 27.4 155-15.87 8.0* 1.8 8 332 12.2 1.27 9.0 

1 22 2 29.9 19-24.2 155-15.6 3.6 1.0 8 227 2.5 0.10 0.5 

1 22 20 10.0 19-48.9 155-42.3 7.7 2.4 13 189 24.0 0.22 1.6 

to-' 1 22" 48 35.2 19-20.7 155-29.2 8.5 2.2 15 107 10.4 0.09 0.9 

0 1 48 39.3 19-30.1 155-28.0 5.4 2.1 13 152 B.2 0.1«) 1.0 

2 4 54 47.3 lq-25.1 155-17.1 7.9 1.8 8 198 0.4 0.39 1.3 

? Il 48 39.4 19-?2.1 155- 8.1 8.0 1.7 13 189 3.3 O. 11 1. 1 

3 1 52 25.8 19- 8.0 155-32.9 8.7 2.8 15 lS8100.8 0.12 1.2 

3 4 4 30.') 19-24.0 154-58.3 8.5 2.6 14 210 1t.7 0.12 1.6 

3 6 41 6.7 19-19.4 155-15.8 9.8 1.5 12 191 3.1 0.09 0.1 

3 11 5 Sq.l 155-40.0 4.9 2.6 q 230 ZQ.6 0.12 0.6 

3 19 7.7 57.2 19-12.0 155-34.9 8.6 2.6 17 124 6.6 0.09 0.8 

3 21 '17 59.9 19- 8. 1 155-31.4 6.8 2.4 11 182 12. 3 0.12 1.1 

4 3 53 27.5 19- 8.2 155-31.6 6.3 2.4 14 170 12.2 0.14 1.2 

4 4 54 3q.9 19- 8. 1 155-32.1 7.5 2.3 14 166 11.4 0.13 1.3 

4 23 13 6.7 19-26.3 154-52.0 6.2 2.4 8 285 4.4 0.33 2.5 

5 0 20 54.8 18-59.1 155-12.3 21.9* 2.5 17 250 3q.8 0.75 1.8 

5 12 21 50.5 19-21.6 155- 6.-3 4.0 2.4 17 176 15.8 0.09 0.7 

5 17 51 8.6 1'>5-16.5 2.2 0.7 7 177 1 • 1 0.32 0.8 

5 19 22 35.1 19-15.5 155-22.8 33.5 2. 1 15 126 10.5 0.19 0.9 

6 0 19.7 1 q. 2 155-11.5 10.6 1.5 12 224 5.7 0.23 1.4 

6 1 31 57.8 19-19.9 1')5-13.5 9.5 1.7 12 192 4.8 0.1? 1.0 
SUMMARV lJF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

JUl 6 2 25 3.2 19-17.4 155- 9.51 2.0 1.6 9 189 14.5 0.30 1.6 1

6 2 56 1.2 19-22.6 155-12.4 0.1 0.8 6 175 0.3 0.17 1.5 1

6 3 38 46.7 19-20.5 154-55.61 5.1 2.3 9 2';2 15.2 1.84 4.8 5

6 5 50 33.1 19-23.8 155-11.1 2.8 0.1 9 132 1.0 0.06 0.5 0

6 6 38 28.1 19-29.6 155-28.1 6.4 1.7 11 153 8.4 0.13 0.8 1

6 8 23 37.4 19-19.4 155-16.5 8.3 1.6 10 232 2.1 0.22 1.5 0

b 10 59 3q.2 19-22.8 155- 3.6 1.4 2.3 14 118 21.1 0.42 0.8 2

6 11 6 54.2 19-23.8 155-24.1 10.5 1.7 13 119 6.8 0.01 0.1 0

6 It 10 17.1 19-20.3 155-19.5 6.1 1.5 il 128 3.7 0.04 0.3 0

1 2 12 35.6 19-22.7 155-25.6 10.4 1.8 13 122 6.1 0.01 0.1 0

7 2 54 41.3 19-18.4 155-12.6 6.5 1.5 9 244 7.1 0.51 2.1 1

1 11 41 1.4 19-13.3 155-32.3 1.1 2.6 16 135 8.9 0.01 0.6 0

1 16 20 31.5 lq-13.9 155-30.3 21.7 2.3 11 142 12.0 0.41 1.1 4

7 23 ·.39 45.2 19-21.8 155-26.8 7.6 2.5 18 91 6.8 0.01 0.6 0

8 0 12 12.3 19-19.9 155-15.1 10.0 2.2 16 160 3.0 0.05 0.5 0

8 0 25 4.2 19-24.1 155-17.6 14.7 1. 1 9 qa 1.2 0.18 0.7 1

8 1 55 16.2 19-17.4 155- 2.0 2q.6 2.4 11 212 25.3 0.12 0.6 1

8 6 41 28.2 19-20.4 155- 6.5 5.8 1. 8 13 203 6.1 0.28 2.1 1

8 10 59 32.9 19-19.5 155-16.1 9.2 2.4 16 163 2.6 0.08 0.6 0

8 16 48 2.3 19-24.8 155-11.9 9.2 1.9 11 77 0.8 0.39 1.0 2

8 17 43 43.4 19-18.6 155-12.0 13.3 1.9 10 248 6.9 0.31 1.7 1

8 17 46 5].6 19-22.9 1.55-11.9 10.0 1. 1 8 132 3.q 0.12 1.7 1

8 17 41 14.2 19-22.2 155-11.8 9.2 2.1 18 130 1.3 0.01 0.8 0

8 17 54 1.9 19-22.8 155-11.8 9.3 1.6 15 128 3.1 0.04 0.5 08 18 21 39.8 19-47.0 155-17.77 3.2* 2.4 5 221 16.7 0.50 3.0 

8 18 42 14.3 19-20.8 155-15.5 21.8 2.3 17 150 2.0 0.15 1.1 1

q 2 13 52.7 20- 2.6 155-34.5 8.0* 2.9 11 308 63.5 1.87 11.3 

10 3 48 40.6 19-26.5 155-24.4 9.0 2.1 14 181 6.4 0.12 0.9 0

10 5 43 4.6 19-11.8 155- 4.31 0.1 2.4 1 1 264 21.1 1.62 3.8 5

10 14 43 28.6 19-26.7 155-14.5 25.7 2.0 15 104 5.9 0.09 0.7 1
OF SEISMIC EVENTS .( C0 T I :''1 UED)

1970 HR SEC lAT N l ()f"G W DEPTH MAG ·\40 GAP OMIN FRT EKH 

JUL 10 16 45 56.1 19-21.9 155-13.1 11.8 1. 3 8 154 1.5 0.11 0.8 

10 18 0 43.1 19-21.8 1«)5-12.2 9.9 1.8 15 161 1.4 0.05 0.6 

10 18 7 13.3 19-23.2 155- 4.1 3.6 2.8 18 175 14.8 0.11 o.q 

10 18 10 16.6 lq-22.7 155- 3.81 0.0 2.0 15 177 20.1 0.46 0.9 

10 19 58 27.3 19-19.9 155-16.0 q.8 1.7 15 158 2.5 0.06 0.6 

10 21 40 12.5 19-?2.9 155- 4.0 5.7 3.2 18 176 1It. 9 O. 10 0.9 

10 21 52 32.4 lq-?5.5 155- 4.5 9.4 3.0 17 159 11.8 0.05 0.8 

10 23 25 46.6 19-43.5 156- 6.7 8.0* 2.1 7 301 69.1 1.20 7.4 

11 11 36 28.1 19-25.2 155-23.2 9.9 1.4 12 169 6.2 0.08 0.6 11 12 38 21.4 19-21.9 155-16.3 31.2 3.0 22 112 1.2 0.11 O.R 

11 18 59 14.q 19-19.3 lS5-15.2 7.9 1. 1 13 214 4.1 0.21 1 • 1 

......

1 1 71 16 28.6 18-59.6 155-20.9 26.6 2.3 18 242 0.28 1.4 

N 11 21 32 39.5 19-29.3 155-35.5 5.1 1. 7 6 262 21.3 1.01 5.0 

1 1 22 11 9.5 19-1.6.5 155-19.1 10.3 1.4 13 169 7.3 0.11 0.9 

11 23 30 1.9 19-26.4 155-25.9 8.5 1.5 12 173 7.7 0.09 0.6 

17 1 13 41.7 20-17.0 156- 0.3? 4.6 2.5 23 320146.4 O.lq 1.7 

12 5 1 1 37.3 19-28.2 155-52.:-\ g.l 2.7 18 168 7.5 0.14 2.0 

12 5 15 10.7 19-24.4 155-57.1 6.5 2.7 12 231 13.0 0.43 2.9 12 5 It 1 58.1 19-10.4 155- 3.0 1.8 1.7 8 271 24.3 1.48 3.5 

12 7 32 17.6 19-19.8 155-28.7 8.0 1.8 8 127 17.1 0.10 1.2 

12 q 40 31.8 19-25.6 155-23.2 13.2 1.7 8 17R 5.7 0.36 1.2 

12 10 14 5.1 1q-19.5 155-11.4 26.9 2.5 11 288 8.1 0.36 2.1 

12 13 39 4'3. 1 t9-11.2 154-59.3 1.6 2.3 12 258 27.1 0.80 3.3 

12 14 51 5'5.8 19-18.8 155-16.5 34.3 2.6 21 166 2.8 0.16 1.0 

12 14 55 36.1 19-29.9 15j-14.4 9.3 1.7 16 129 10.0 0.08 0.6 

12 18 18 31.0 19-17.5 155-13.1 12.5 1. 8 14 204 8.8 0.25 1.7 

12 lR 56 32.5 18-43.6 155-43.3 3.2* 3.0 9 336119.7 0.51 4.9 

12 18 58 23.6 19-16.2 155-22.3 5.4 1.7 16 162 7.6 0.10 0.7 

13 12 48 36.it 19-17.2 155-24.4 4.0 1.7 13 154 5.9 0.10 0.9 

13 16 6 2.9 19-17.9 l55-43.3 11.2 2.7 12 262 12. 1 0.47 3. 1 
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

JUL 13 11 q 31.3 19-50.0 155-20.8 25.6 2.5 14 219 12.9 0.15 1.4 

13 18 46 18.3 19-21.9 155- 1.57 0.0 2.7 16 207 18.5 0.34 0.7 

13 21 39 48.2 19-20.1 155-15.9 10.0 1.1 17 157 2.5 0.06 0.5 0

14 1 40 38.0 19-24.0 155-16.1 2.8 1.1 8 204 1.6 0.07 0.4 0

14 1 59 5.2 19-22.3 155-11.4 7.9 2.0 16 139 1.9 0.12 '1.4 0

14 3 29 48.0 19-30.6 155-40.6 24.6 2.3 9 125 25.8 0.55 1.5 1

14 5 13 24.3 19-17. 9 155- 5.21 29.6 2.5 13 199 20.5 0.17 1.1 2

14 10 58 1.3 19-19.5 155-28.8 9.1 1.7 14 153 9.8 0.11 0.9 0

14 13 48 41.9 19-21.4 155-13.6 14.1 1.5 12 166 2.1 0.07 1.1 0

14 17 23 51.8 19-21.5 155-26.4 9.0 2.0 15 94 5.9 0.08 0.8 014 11 34 25.5 19-22.0 155-1,3. B 13.8 1.5 9 149 3.9 0.01 0.9 0

14 21 44 36.9 19-21.6 155-13. 1 13.4 1.3 13 159 2.7 0.06 0.9 0

w 15 4 13 55.0 19-21.8 155-13.1 13.5 1.7 14 154 2.4 0.05 0.7 0

15 6 15 24.8 19-12.4 155-22.01 54.1* 2.1 13 221 14.6 0.42 16.1 

15 6 22 5.5 19- 8.6 155-26.11 36.3* 2.0 13 181 20.6 o. 11 1.5 

15 6 18 21.5 lq-12.4 155-26.2 5.3 2.2 8 194 15.3 0.11 0.8 0

15 10 54 9.6 19-20.2 155-15.8 9.1 2.5 16 156 2.8 0.06 0.5 0

15 11 5 2"3.8 19-19.0 155-11.3 6.9 1. 3 12 237 5.6 0.21 1.6 0

15 14 52 13.8 19-19.6 155-14.4 1.2 1.4 12 212 4.3 0.24 1.4 1

15 16 12 19.6 19-19.2 155- 6.6 6.4 3.4 11 181100.2 0.17 1. 1 0

15 16 28 18.4 19-21.2 155- 6.0 6.8 2.1 15 198 7.0 0.19 1.6 0

15 18 1 41.3 19-20.5 155-19.4 7.1 1.4 14 123 3.6 0.09 0.8 0

15 18 4 37.5 19-22.8 155-50.8 8.0 10 188 17.4 0.12 1.1 0

15 18 22 6.8 19-20.2 155- 9.9 9.3 1.4 12 197 3.0 0.17 1.1 0

15 21 5 1.7 19-25.0 155-24.6 13.7 1.5 9 208 8.4 0.35 1.0 2

15 22 3 21.2 19-21.4 155- 4.0 23.4* 1.7 1 347 10.5 0.32 5.2 

15 22 21 23.4 19-18.8 155-12.3 6.7 1.5 9 225 6.8 0.24 1.5 1

15 23 41 30.9 19-20. '7 155-13.0 9.3 1.4 13 181 3.4 0.14 1.0 0

15 23 54 53.4 19-20.4 155- 7.4 5.6 2.3 11 179 14.0 0.14 1.1 0

15 23 55 57.1 19-19.4 154-59.3 7.7 1.7 12 23q 19.3 0.64 4.3 1
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR tiN SEC tAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

JUL 16 2 2 23.5 19-11.1 155- 3.11 0.0 1. 7 q 268 22.5 1.96 4.5 6

16 5 10 39.4 19-21.2 155-15.3 29.8 1.9 16 146 1.2 0.13 0.8 1

16 11 2 0.5 19-27.5 155-31.4 9.4 2.1 11 261 23.2 0.44 2.6 O

16 19 40 26.1 19-46.2 155-24.1 34.7 2.4 16 146 5.5 0.12 0.6 1

16 20 23 13.9 19-46.9 155-24.2 33.1 2.5 11 150 5.4 0.11 0.9 2

11 3 19 32.9 19-54.1 155-34.6 14.1* 2.5 13 153 18.8 0.10 1.1 

1'7 11 B 31.1 19-19.4 155-22.8 21.2 14 138 1.7 0.19 1.0 2

11 16 27 41.2 19-21.9 155- 8.1 6.2 2.4 18 171 12.6 0.10 0.9 0

17 22 19 10.0 19-19.3 155-14.0 31.2 2.1 18 169 5.1 0.09 0.1 1

18 5 59 31.2 19-37.1 156- 7.7 1.3 2.5 13 265 24.2 0.53 2.4 2

18 13 54 38.6 19-12.6 155-31.6 1.0 2.4 14 142 10.6 0.10 0.9 0

18 14 45 58.5 19-22.1 155-15.5 31.5 2.3 14 103 0.6 0.14 1.0 1

.p- 18 15 20 4.3 19-21.6 155-15.2 29.4 2.1 11 142 0.5 0.11 0.8 1

18 15 38 15.9 19-15.8 154-59.9 11.2* 2.3 15 224 26.1 0.20 1.6 

19 1 41 15. '7 19-14.9 156-13.5 0.7 2.1 13 299141.9 0.24 2.3 1

19 4 49 23.1 19-3'7.9 156-16.41 0.0 2.8 17 282146.0 0.48 2.1 2

1q 8 58 59.4 19-24.9 155- 3.0 5.5 1.8 11 178 13.5 0.08 1.1 1

19 9 43 2.<) 19-22.0 155-12.0 29.6 1.5 12 180 5.8 0.14 1.1 1

19 19 58 45.2 19-25.6 154-52.4 8.5 2.2 15 211 5.3 0.53 3.8 0

19 23 1 31.9 19-17.1 155- 3.51 10.0 1.9 11 241 14.4 0.45 4.0 1

19 23 16 21.4 19-21.4, 155-25.5 8.9 1.4 12 119 4.5 0.13 1.0 1

20 6 0 10.4 19-22.8 155-11.6 2.1 1.4 5 193 1.6 

20 12 57 46.2 19-11.6 155-28.1 1.9 2.4 14 163 16.0 0.12 1.1 0

20 18 12 58.1 19-22.5 155-11.8 9.5 1.6 14 135 1.2 0.06 0.6 0

20 18 44 57.8 19-24.5 155-28.9 7.7 2.4 11 70 12.6 0.09 0.7 0

21 2 59 52.1 19-10.1 155-,36.9 7.2 2.• 3 14 181 8.8 0.12 1.1 0

21 5 52 0.1 19-14.9 155- 8.0 0.6 2.0 10 226 13.3 1.39 2.4 6

21 10 15 33.4 19-20.7 155-11.4 21.8 13 qS 1.1 0.36 1.7 3

21 12 9 14.1 19-19.1 155-10.9 1.2 2.0 13 242 5.3 0.26 1.6 0

21 22 46 34.1 19-28.9 155-53.4 8.5 2.8 15 173 5.4 0.11 1.6 1

_. _._ '_ .' r

.. _--. -_.-._-

-

---_..._-- .... -.._---_..

------ ---_.--
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG w DEPTH MAG NO GAP DMIN ERT ERH E

JUL 22 12 47 4.1 19-24.0 155-25.2 11.4 2.3 14 124 1.8 0.08 0.1 1

22 15 54 10.6 19-20.6 155-30.0 11.3 2.5 13 136 11.8 0.01 0.1 1

22 16 15 58.1 1<)-59.3 155-24.1 10.5 3.7 21 266105.0 1.09 1.6 6

22 16 38 19.3 19-20.1 155-25.8 8.1 2.0 13 122 4.3 0.09 0.9 0

23 2 26 33.9 19-20.0 155-13.2 10.1 1. q 13 192 4.9 0.09 0.9 0

23 9 43 46.2 19-22.3 155-23.1 1.8 1.5 11 112 4.0 0.14 1.0 1

23 12 56 52.2 19-18.3 155-14.4 8.0 1.5 13 211 6.3 0.20 1.3 0

23 14 41 35.5 19-11. B' 155- 6.6 3.5 2.1 14 214 13.5 0.33 1.9 1

24 6 54 28.1 19-21.5 155-26.0 8.5 2.3 16 92 5.3 0.08 0.8 0

24 7 46 30.9 19-21.q 155-16.8 28.2 1.9 15 107 1.8 0.15 0.9 1

24 16 30 52.7 19- 1.6 155-23.61 15.4* 1. 8 10 210 23.2 0.25 2.5 

......, 24 19 15 46.6 19- 2.5 155-19.4 12.3 1.8 14 264 30.2 0.48 6.2 13

U1 24 19 34 30.2 19-21.4 155-12.6 9.6 1.6 13 113 2.0 0.07 0.1 0

24 2L 31 li.7 19-11.5 155-24.6 2.0 1.5 10 150 13.5 0.53 0.8 3

24 22 32 48.3 19-15.6 15S- 8.6 3.2 1.8 13 221 11.7 0.32 1.6 1

24 22 38 33.0 19-13.9 155- 9.0 6.0 1.7 11 250 14.7 0.52 2.4 1

24 26 15.0 19-19.7 155-12.3 12.2 1.4 11 227 5.3 0.34 1.8 2

25 1 48 0.2 19-25.3 155-29.4 6.8 1.8 13 127 13.5 0.14 1.0 1

25 2 43 36.0 19-23.9 155-11.6 10.9 1.6 11 93 1.4 0.11 0.4 0

25 6 0 45.0 19-42.3 155- 2.61 3.3* 1. q 18 227 29.5 0.26 1.3 

25 14 1 6.2 19-19.7 ·155-13.7 7.9 1.0 10 214 4.8 0.30 1.9 1

25 20 16 58.8 19-32.3 155-36.41 0.8 2.0 15 124 23.4 0.57 0.8 3

25 21 30 34.4 19-13.0 155- 8.0 2.6 1.6 8 255 l6.6 1. 12 2.4 4

25 23 16 46.6 19-23.9 155-17.2 ll.q 1.3 9 129 1.2 0.18 0.1 1

26 0 55 44.9 19-18.2 155-15.q 10.2 1.4 12 204 4.4 0.12 0.9 0

26 5 42 45.9 19-23.9 155-l1.8 9.0 1.3 10 104 1.6 0.24 0.6 1

26 13 4 37.3 19-24.1 155-24.6 11.9 1.5 12 122 7.5 0.08 0.7 1

26 17 21 36.6 1q- 3 155-36.6 8.5 2.2 14 179 23.2 0.10 0.6 0

26 17 43 2.7 19-12.1 155-27.51 0.0 1.8 8 116 16.7 0.34 1.3 126 18 8 14.6 1Q-21.0 155-24. -3 8.7 1.6 12 115 2.2 0.14 1.1 1
SUMMARY OF SEISMIC EVENTS (CONTINUED)

191() HR MN SEC LAT N LONG W DEPTH MAG GAP DMIN ERT ERH ·E

JUl 26 21 10 14.1 19-24.5 155-11.6 9.5 1.1 8 103 0.4 0.33 0.8 1

26 21 21 1.6 19-20.9 155-11.7 9.5 1.2 9 200 3.2 0.53 1.9 2

26 23 4 39.4 19-30.0 155-51.5 1.6 1.9 12 137 7.0 0.15 2.8 3

21 3 21 31.0 19-29.3 155-41.0 6.8 1.9 12 226 27.4 0.21 1.0 0

27 3 29 11.0 19-26.2 155-16.6 15.6 2.1 15 109 2.3 0.09 0.9 1

27 4 12 3.1 19-21.8 155-29.1 8.2 1.7 11 136 10.7 0.13 1.2 1

27 5 40 34.9 19-21.2 155-16.6 26.4 2.2 12 142 2.6 0.15 0.9 1

28 3 9 38.0 19-20.8 155-16.1 29.9 15 141 1.8 0.11 0.8 1

28 1 51 0.2 19-14.1 155-24.3 32.5 2.5 18 165 11.3 0.15 0.9 1

78 8 12 24.1 18-54.6 155-14.5 15.8* 2.8 20 284 42.3 0.23 1.6 

28 9 12 30.0 19-50.8 155-21.4 31.8 2.6 12 190 12.7 0.25 1.3 2

28 11 11 38.6 19-25.4 155-23.1 11.5 1.9 12 168 5.9 0.01 0.6 0

0'\ 28 11 58 58.4 19-20.1 155-14.5 8.1 1.1 15 180 2.5 0.12 0.8 0

28 23 44 14.6 19-22.2 155-11.4 8.5 1. 8 12 164 2.0 0.15 1.1 0

29 8 7 20.1 19-48.3 155-18.91 5.5 2.2 6 281 14.8 0.61 2.6 1

29 12 42 40 •.3 19-20.7 155-11.4 1.4 13 207 3.2 0.21 1.5 0

29 18 23 21.9 19-23.4 155- 3.3 1.9 2.1 15 192 12.2 0.14 1.7 0

30 1 28 36.7 19-45.8 155-23.6 32.1 2.5 11 146 6.6 0.13 0.1 1

30 1 48 18.0 19-21.5 155-11.2 10.6 1.1 13 155 3.9 0.11 1.0 0

30 1 51 50.1 19-20.6 155- 4.2 5.0 2.9 11 188100.9 0.16 1.1 0

31 0 58 31.0 19-20.5 155-12.0 9.4 2.2 15 169 4.2 0.10 0.9 0

31 5 39 34.7 19-19.6 155-13.4 7.3 2.2 15 178 5.3 0.15 1.1 0

31 5 52 59.0 19-19.1 155-13.5 6.8 1.8 11 226 5.9 0.35 2.0 1

31 11 20 59.4 19- 9.1 155-22.6 39.5 13 194 20.6 0.23 1.2 2

31 22 13 29.7 19-22.9 155-12.2 0.1 1.8 9 184 1.0 0.10 0.6 4

31 22 51 31.0 lq-51.5 154-54.01 8.0* 3.1 25 262124.2 0.70 4.1 

.AUG 1 2 22 29.8 19-1.0.4 155-31.8 10.6 2.5 15 151 8.3 0.08 0.9 0

1 2 55 56.8 19-20.1 155-11.0 1.3 12 194 2.6 0.14 1. 1 0

1 I) 10 46.5 19-20.6 155-16.1 31.2 2.3 18 151 2.6 0.11 0.8 1

1 9 44 28.1 19-20.0 155- 3.0 4.6 2.8 16 195 11.4 O.lQ 1.4 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

AUG 1 9 49 42.1 19-21.0 155- 5.q 4.5 2.1 14 183 11.9 0.19 1.2 1

2 1 45 40.6 18-58.6 155- 5.9 1.7 2.5 16 259 43.5 0.25 2.3 2

2 5 53 49.7 19-23.1 155-28.6 7.5 2.6 16 81 10.8 0.10 0.8 0

2 11 45 16.5 19-20.6 155- 6.8 7.1 2.3 16 200 6.1 0.19 1.5 0

2 14 12 31.0 19-11.5 155- 4.1 35.4· 2.5 14 236 12.2 0.6·2 2.8 4

2 21 15 16.1 19-23. 8 155-23.5 8.0 2.2 15 18 6.6 0.07 0.6 0

3 2 8 46.6 19-22.8 155- 8.4 8.9 2.2 18 165 3.3 0.08 0.9 0

3 7 50 37.4 19-24.3 155-11.1 8.4 9 132 1.0 0.43 1.0 2

3 12 2 54.5 3.6 156- 1.9 8.0* 3.1 19 115135.4 0.11 1.4 

3 22 54 1.9 19-22.4 155- 8.0 6.6 2.0 L6 168 12.8 0.10 1. 1 0

4 20 59 4.2 19-23.8 155-18.4 8.6 1.9 11 67 2.3 0.16 0.4 1

4 70 59 54.8 19-23.4 155- 4.5 2.2 2.1 1-3 172 19.1 0.44 0.9 2

-....J 4 21 45 46.8 19-15.4 155-27.2 6.2 2.1 18 148 11.2 0.08 0.7 0

5 2 42 8.2 19-16.3 155- 2.5 35.3 2.5 15 212108.7 0.29 1.6 2

5 9 33 7.6 19-21.1 155-10.4 10.3 2.4 16 160 0.8 0.13 1.0 0

'3 12 -36 36.8 19-59.1 155-34. 8 8.1 2.8 11 216102.4 0.16 1.6 0

5 16 25 58.0 19-19.3 155-14.1 9.9 14 202 5.0 0.11 0.8 0

5 22 55 8 19-20.0 155-16.1 9.9 16 151 2.4 0.05 0.5 0

6 0 33 33.8 19-11.1 155-13.0 40.5 14 206 18.4 0.38 2.1 3

6 3 11 34.7 19-10.5 155-36.31 7.0 11 168 8.2 0.41 3.9 1

6 4 15 44.0 19-14.2 155-22.2 4.1 1.8 13 170 11.2 0.12 0.9 

6 6 51 0.9 19-21.6 155- 6.8 5.3 2.6 16 176 14.8 0.13 1 • 1 0

6 21 51 55.6 19-21.5 155- 1.61 0.0 2.5 13 213 19.1 0.81 1.3 4

6 22 46 42.2 19-19.7 155-16.7 11.4 1.3 8 242 1.4 0.18 1.6 3

6 23 13 10.6 19-21.3 155-13.5 9.8 1.6 14 171 3.3 0.08 0.8 0

1 0 33 28.2 19-16.6 155- 0.3 34.3 2.6 20 219110.9 0.28 1.5 2

7 0 ')9 5 1q-24.3 155-15.6 3.5 0.8 6 239 2.6 0.03 0.1 0

7 2 1 15.8 19-17.6 155-13.2 13.6 1.5 9 249 8.6 0.25 1.2 1

7 4 13 51.8 19-20.6 155-13.3 13.3 1.4 9 193 4.1 0.11 0.5 0

7 5 11 36.9 19-16.q 155- 0.4 32.3 2.8 21 218110.4 0.19 1.1 1
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH 

AUG 7 6 48 32.4 19-11.5 155- 6.1 3.7 1.8 15 217 13.6 0.32 1.9 

7 6 59 46.5 19-20.0 155-17.5 7.1 1.2 10 216 0.2 0.09 0.5 

7 10 22 28.2 19-20.2 155-13.9 8.0 1.5 15 189 3.8 0.15 1.1 

7 10 23 8.0 19-54.0 155-22.81 0.0 3.7 23 190 36.4 1.15 4.0 

1 11 8 2.7 19-19.8 155-13.3 7.7 1.7 13 201 5.2 0.20 1.4 

7 11 46 36.0 20- 3.6 155-20.4 9.4 3.0 22 195123.1 1.15 1.1 

7 18 51 48.3 19-40.9 155-16.2 45.3 2.3 18 140 19.4 0.27 0.8 

8 1 4 25.9 19-11.4 155- 1.1 2.9 1.7 12 217 16.5 0.81 1.1 

8 1 5 17.6 19-24.2 155-25.2 13.3 1.3 q 222 8.1 0.45 1.5 

8 8 4 58.9 20- 4.4 155-22.5 8.1 2.5 19 302114.8 0.32 1.9 

8 11 17 42.5 19-20.3 155-13.9 8.1 1.5 14 188 3.1 0.16 1.1 8 11 53 54.0 19-21.3 155-14.4 8.2 1.4 14 164 1.8 0.12 0.9 

ex> 8 12 58 2.7 19-21.9 155-13.6 9.9 1.4 15 152 2.2 0.07 0.7 

8 15 13 31.1 19-17.6 155- 0.1 31.6 2.0 13 217 23.1 0.31 1.6 

8 17 20 21.4 19-22.5 155- 7.0 7.6 2.0 14 lql 5.4 0.14 I.? 

8 23 21 41.1 19-22.5 155-18.1 22.3 1.7 13 79 2.8 0.11 0.7 

8 23 58 36.6 19-1ge6 155-15.9 9.3 1. 5 13 163 2.9 0.06 0.6 

9 0 B 12.6 19-21.1 1-55-10.5 8.6 1.7 15 192 4.4 0.18 1.4 

q 5 32 2.6 19-25.0 155-23.6 8.9 2.6 17 12 6.q 0.01 0.7 

q 5 47 2.2 20- 9.6 155-34.9 33.7 2.6 16 212121.9 1.2 

q 7 3 21.5 19-19.1 155-25.6 6.7 1.3 11 126 12.7 0.08 0.8 

9 7 46 6.7 19-15.5 155-30.4 8.2 2.1 11 134 11.7 O. 11 1. 1 

9 8 19 51.8 19-11.4 155- 1.3 35.5 2.3 11 217 22.4 0.19 1.2 

9 8 36 34.0 19-12.9 155- 5.2 4.3 2.2 16 257 18.6 0.69 3.2 

9 13 10 10.3 19-54.4 155-18.7 8.3 1.9 14 255 20.1 0.46 2.5 

10 0 29 13.5 19-22.1 155-23.1 8.7 1.3 14 138 1.5 0.07 0.6 

10 6 22 34.9 19-25.6 15'5-24.1 7.6 2.3 14 162 6.9 0.07 0.5 

10 10 '\3 35.4 19- 9.4 155-31.1 1.0 2.1 6 114 14.4 0.33 '2.9 

11 11 37 18.9 19-1)8.2 156- 6.0 0.4 2.5 1.4 309113.1 0.22 7.9 

11 21 18 44.7 lQ-20.7 155-12.9 9.3 1.1 14 188 3.4 0.16 1.1 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W OEPTH MAG NO GAP OMIN ERT ERH ER

AUG 11 21 49 51.2 19-21.6 155- 8.2 5.4 1.9 11 171 12.4 0.11 0.9 0

12 0 51 46.0 19-13.6 155-24.3 30.9 10 167 12.2 0.29 1. '1 3

12 0 58 23.2 19-45.0 155-20.11 8.8 2.5 9 221 12.8 0.11 3.9 2

12 3 32 30.1 19-18.8 155-14.4 8.9 2.4 19 169 5.8 0.12 1.0 0

12 9 24 11.0 lq-29.3 155-14.21 23.6 15 127 11.8 0.19 1.1 2

12 20 56 35.5 19-20.5 155-12.6 9.7 2.1 19 166 3.7 0.08 0.8 0

12 21 51 0.9 19-10.4 155-32.9 28.8 2.4 17 142 11.0 0.23 1.2 2

13 1 6 31.2 19-20.4 155- 1.1 5.0 2.0 16 180 14.5 0.13 0.9 0

13 7 22 0.0 19-18.6 154-59.6 7.9 2.3 12 242 19.2 0.40 2.1 0

13 q 25 46.4 19-15.2 155-26.9 7.7 15 151 11.2 0.11 0.9 0

13 20 15 3.9 19-20.5 155-11.6 9.1 2.1 15 191 3.7 0.13 1.3 0

I-' 13 22 15 55.8 19-20.9 155-12.9 8.9 1.8 15 183 3.0 0.12 0.9 0

\0 13 23 46 53.6 19-16.5 155- 5.3 30.4 2.4 18 225 21.6 0.27 1.5 3

14 11 42 58.1 19- 4.2 155-20.9 15.6* 13 238 27.6 0.22 1.1 

14 21 ,31 43.3 19-11.4 155-30.7 4.2 13 154 13.0 0.12 1.0 1

14 23 3 28.3 19-19.9 155-14.3 9.1 1.1 16 192 4.0 0.11 0.8 0

16 7 41 53.1 lq-25.5 154-41.1 50.5* 4.4 24 288118.8 0.20 2.2 

16 13 0 20.2 19-12.8 155-28.8 30.0 2.1 14 163 15.0 0.18 1.4 1

16 14 43 38.5 19-20.0 155-52.0 6.9 2.7 11 263 27.8 0.28 1.8 116 17 7 36.7 19-22.8 155- 8.5 1.9 2.0 15 166 3.2 0.11 1.1 016 17 9 51.2 19-22.2 155-50. 1 1.3 2.4 14 181 19.0 0.13 1.2 0

16 lq 6 24.9 19-56.0 155-40.31 33.1 2.6 15 311 28.6 0.23 2.1 4

16 21 17 46.6 19-20.9 155-12.6 9.8 1.9 14 187 3.0 0.13 1.0 0

17 12 38 28.5 19-21.2 155-15.9 15.1 1.8 12 147 1.5 0.12 0.7 1

17 13 16 27.8 19-13.1 155-30.5 6.3 2.8 15 146 12.1 0.08 0.7 0

11 1'5 1. 1 19-24.1 155-28.6 7.8 2.5 17 93 11.8 0.09 0.8 0

L1 20 25 53.5 19-22.0 155- 8.q 9.2 1.8 13 190 1.9 0.11 1.1 0

17 20 33 36.9 19-21.2 155- 9.2 8.6 1.9 15 194 1.9 0.14 1.1 0

17 23 28 0.5 19-19.4 155-16.0 31.8 3.4 23 163190.• 0 0.11 0.8 1

17 23 34 2.8 19-18.2 155-16.4 28.6 2.1 14 169 7.9 0.12 0.8 1
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH 

AUG 18 1 50 34.1 19-20.3 155-11.1 31.6 2.4 19 150 4.2 0.10 0.8 

18 4 6 50.9 19-22.4 155-21.3 1.5 1.9 13 129 8.1 0.09 0.7 

18 8 52 42.8 19-11.1 155-22.2 6.8 . 1.8 8 169 6.1 0.10 0.8 

18 9 21 32.3 19-21.7 155-25.1 13.2 1.6 10 138 5.1 0.11 0.8 

18 16 29 23.2 19-12.3 155-23.0 30.8 1.1 9 201 14.5 0.68 2.7 

18 18 6 55.1 19-21.6 155- 3.4 1.9 1.9 13 206 16.0 O.4Q 1.2 

18 20 38 7.8 19-11.6 155-33.5 7.3 2.3 11 139 8.8 0.08 0.8 

18 23 33 6.0 19-24.6 155-30.0 6.7 1.8 12 152 14.3 0.16 1.1 

19 6 53 10.5 19-10.8 155-35.0· 8.2 2.3 6 142 8.4 0.11 1.2 

lq 13 4 13.3 19-18.3 155-12.8 13.5 9 244 1.1 0.33 1.6 

19 13 5 39.9 19-29.4 155-21.0 10.9 1.5 9 200 6.6 0.11 0.8 

N 19 14 31 8.9 19-13.8 155- 1.8 3.8 1.8 10 251 15.2 0.53 2.5 

0 19 15 12 50.0 19-18.6 155-13.3 14.0 1.2 6 235 6.8 0.22 1.2 

lq 15 13 28.4 19-17.1 155-13.3 10.6 1.6 9 254 9.0 0.36 2.2 

19 16 3 55.1 19-19.6 155- 6.8 5.1 1.9 13 207 11.4 0.24 1.5 

20 2 25 46.9 19-22.8 155-23.8 11.3 1.3 12 126 4.9 0.11 0.7 

20 2 36 2.8 19-22.3 155-10.1 9.6 1.8 15 126 1.5 0.05 0.6 

20 9 44 43.0 19-22.3 155-26.2 7.4 1.1 10 129 11.7 0.08 0.1 

20 10 43 13.1 19-24.8 155-26.3 1.4 1.4 12 132 9.9 0.12 0.9 

20 12 19 41.2 19-24.6 155-23.7 11.6 1.5 6 189 1.1 0.15 0.7 

20 20 39 15.4 19-19.9 155- 1.7 8.1 1.9 1 230 14.9 1.00 7.6 

21 8 16 2.5 19-17.0 155-24.11 9.7 2.0 14 111 6.4 0.23 2.1 

21 9 59 54.8 155-53.51 8.4 2.2 13 184 4.6 0.13 5.3 

21 11 2 28.0 19-15.8 155-22.9 9.3 1.6 13 171 8.2 0.09 0.9 

21 14 1 1.5 19-15.8 155-23.3 9.0 1.0 9 213 8.1 o. 1-8 1.1 

21 15 23 55.4 19-3-8. 1 155- 5.11 12.5 2.4 20 227 28.5 0.69 5.0 4

21 18 16 58.1 19-18.6 155-14.5 14.9 1.5 8 255 5.8 0.12 0.8 0

21 23 22 36.4 19-18.6 155-16.9 9.5 2.1 11 166 2.9 0.11 0.9 

21 23 31 30.0 19-19.8 155-14.7 10.3 1.3 16 166 3.9 0.06 0.5 

22 1 48 54.9 19-24.1 155-11.6 7.4 1.2 6 112 0.2 0.42 1.1 2
SUt.1MARY OF SEISMIC EVENTS (CONTINUED)

1970 HR SEC LAT N W DEPTH MAG NO GAP DMIN ERT ERH 

AUG 22 3 15 11.3 19-23.4 155-46.1 9.2 1.9 6 242 22.2 0.54 2.8 

22 4 52 20.0 19-24.1 155-19.3 1.3 1.4 8 104 1.0 0.38 1.1 

22 6 34 49.3 19-22.4 155-26.1 8.5 1.4 9 122 6.2 0.16 1.3 

22 9 42 56.5 19-15.8 155- 8.5 1.9 2.1 14 199 14.3 0.91 1.5 

22 15 43 0.9 19-18.0 155-16.4 1.8 1.0 10 203 4.3 0.20 1.4 

22 18 3 8.2 19-21.1 155-15.9 8.9 0.9 8 152 1.7 0.20 0.7 

22 18 25 42.2 19-19.3 155-16.1 13.0 1.3 8 212 2.8 0.10 0.5 

23 1 33 19.4 19-17.3 155-24.0 6.4 1.1 10 153 14.0 0.11 1.0 

23 6 11 4q.6 19-31.3 155-41.9 6.2 1.9 14 132 23.4 0.06 0.4 

24 4 32 58.6 19-23.9 154-59.3 5.7 2.4 16 203102.4 0.16 1.3 

24 5 21 40.7 19- 8.9 155-31.31 25.7 2.4 15 173 13.6 0.26 2.1 

N 24 11 30 32.2 lq-23.4 155-22.4 10.3 1.5 14 III 4.8 O.Oq 1.0 

J-l 25 2 51 38.8 19- 3.3 155- 2.1 12.5 2.6 11 212 41.2 0.44 5.4 1

2S 5 50 36.9 19- 9.9 155-41.2 9.8 2.6 11 183 11.7 0.10 0.8 

28 3 37 9.5 19-47.0 155-45.31 5.6 9 161 28.1 0.22 1.4 

28 5 18 33.1 19-26.5 155-24.3 8.7 9 145 9.5 0.20 1.6 

28 7 40 24.5 19- 8.3 155-38.6 8.6 2.4 4 214 9.4 

30 10 't8 6.8 19-15.0 155- 6.11 °37.6 2.4 13 281 20.4 0.29 ?4 

30 16 2 46.2 19-18.0 155- 5.11 29.9 2.3 13 280 19.2 0.22 2.0 

30 17 6 22.3 19-CJ9.1 155-20.8 8.4 3.1 12 219106.1 0.40 1.8 

30 lq 19 37.5 19-21.Y 155-23.2 9.6 L.9 12 93 3.1 0.06 0.7 

°.31 4 54 32.7 19-1q.8 155-14.3 7.9 2.1 11 202 4.2 0.11 1.3 

31 6 18 12.2 19-21.0 155-17.5 28.8 2.2 12 153 3.8 0.22 1.3 

31 6 55 15.8 19-46.1 155-48.6 5.3 3.3 14 118 29.8 0.11 0.9 

31 11 2 41.7 19-20.4 155- 9.11 10.5 11 266 3.0 0.21 1.6 

SEP 1 0 16 45.1 19-25.7 155-13.7 30.7 2.2 18 63 5.9 0.11 0.7 

1 2 8 10.9 19-18.6 155-14.1 10.4 1.6 14 216 6.3 0.12 0.9 

1 13 45 23.4 1q-22.8 155-27.3 8.1 2.5 16 81 8.5 0.09 0.8 

1 16 -:\9 11.0 19-20.3 155-13.2 7.1 1.5 13 169 4.2 0.16 1.2 

1 11 33 56.8 lq-25.6 155-13.9 30.7 2.1 12 112 6.5 o. 18 1. 1 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LAT N LONG W DEPTH MAG GAP OMIN ERT ERH 

SEP 2 2 26 37.2 lq-l1.1 155- 1.2 4.8 2.3 15 192 12.8 0.'22 1.3 

2 5 44 40.4 19-21.2 155- 5.6 1.1 2.0 12 183 11.1 0.50 1.1 

2 5 56 14.4 19-25.1 155-23.6 8.7 1.6 13 142 6.2 0.09 0.8 2 7 12 29.6 19-15.9 155- 1.1 16.6* 2.0 11 221 26.8 0.20 1.6 

2 8 50 27.9 19-22.1 155- 8.1 4.4 12 168 11.6 0.12 1. 1 

2 21 40 48.1 19-22.4 155- 8.8 1.7 2.1 14 169 6.5 0.14 1.3 

3 5 15 54.3 19-12.1 155-25.8 32.4 2.4 13 169 15.5 0.24 1.3 

3 12 0 53.3 19-21.4 155-25.4 7.9 1.9 13 195 5.8 0.12 0.8 

3 14 41 41.4 19-24.3 155-43.3 21.1 2.5 11 231 20.5 0.39 2.1 

4 0 48 14.1 19-18.1 155- 6.4 5.4 2.4 16 191 12.1 0.19 1.2 

4 9 24 38.1 19-22.6 155-22.9 9.3 1.3 11 162 4.5 0.12 0.8 

f'..) 4 14 19 8.0 19-21.6 155-11.5 10.0 1.1 16 151 2.4 0.06 O.b 

N 4 18 22 24.9 19-18.1 155-15.0 11.8 1.5 10 194 5.0 0.10 0.9 

4 19 11 35.8 19-21.5 155-10.41 11.2 1.4 11 181 0.9 0.14 1.6 

4 20 41 16.5 19-23.4 155-29.2 8.4 1.8 16 80 11.8 0.09 0.1 

5 1 40 36.1 19-20.1 155-15.8 29.8 1.5 13 162 2.9 0.20 1.4 

5 8 5 54.6 19-21.1 155-26.5 1.6 1.7 1 242 12.5 0.69 4.1 

5 11 33 3.7 19-21.5 155-11.8 8.8 1.0 13 151 2.1 0.10 0.9 

5 13 12 35.4 19-21.8 155-24.4 8.5 1.3 9 207 3.5 0.16 1.1 

5 15 38 30.2 19-22.4 155- 4.7 13.8 1.9 9 192 9.3 0.15 2.4 

'} 16 25 1.4 19-21.6 155-26.1 1.1 1.3 12 121 5.6 0.09 0.8 

5 20 10 47.3 19-21.1 155-25.8 7.9 2.4 18 99 4.1 0.09 0.8 

5 23 11 45.8 19-25.3 155-27.11 6.2 . 1.3 10 255 10.7 1.50 8.3 1

6 2 44 36.0 19-20.4 155- 1.0 7.1 1.6 13 200 10.3 0.19 1.4 

6 7 20 15.5 19-17.3 155-22.1 8.0 1.0 1 260 5.1 1.33 3.3 

6 q 57 49.1 lQ-20.8 155- 4.11 10.6 2.3 11 189 10.4 0.15 1.2 

6 15 54 26.0 19-22.2 155-25.2 8.5 2.1 17 17 5.0 0.10 0.8 

6 22 3 18.4 19-58.8 155-35.0 14.2 2.9 20 184102.0 0.08 1.8 

1 0 37 5.1 19-20.4 155-15.8 10.8 1.4 9 160 2.8 0.04 0.4 

7 6 31 49.6 19-22.3 155-24.1 8.5 1.4 14 141 4.0 0.08 0.6 
SUMMARY Of SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH 

SEP 1 8 16 54.0 19-21.3 155-14.6 9.6 1.0 8 145 1.6 0.25 0.5 

7 12 t9 33.5 1')-21.5 155-12.5 11. 5 1.2 9 157 1.9 0.16 0.8 

1 13 59 13.1 19-24.5 155-24.3 8.5 1.5 12 185 B.l 0.08 0.6 

7 17 24 50.4 19-25.8 155-11.7 19.8 1.8 12 252 6.3 0.38 1.1 

1 11 45 3.1 18-34.8 155-24.4 8.0 2.8 12 322 57.3 2.2 

7 18 50 3.0 19-25.6 155-26.1 10.8 1.4 11 188 9.2 0.11 0.8 

1 18 58 22.3 19-20.6 155-13.8 11.3 1.5 10 168 3.4 0.07 0.7 

7 19 21 29.5 19-26 •.5 155-13.9 30.8 2.3 20 58 6.1 O.ll 0.8 

7 21 20 49.0 19-21.0 155-15.1 11.9 1.1 q 146 1.5 0.08 0.4 

8 0 'i1 51.1 19-21.7 155-16.6 34.8 1.8 10 118 2.3 0.55 2.1 

8 2 13 5.4 19-21.5 155- 4.01 16.4 1.5 9 202 10.6 0.40 3.4 

N A 5 40 33.4 19-20.3 155- 4.0 8.0 2.2 11 193 20.0 0.18 1.7 

w 8 10 41 8.3 19-24.1 155-27.1 11.2 1.6 12 156 q.7 0.09 0.7 

8 12 q 35.3 lq-13.4 155-20.5 32.1 2.1 17 178 9.1 0.21 1.2 

8 14 4 47.1 19-20.7 155- 8.6 3.8 1.6 12 193 11.8 0.21 1.4 

8 19 14 4.4 19-18.9 155-13.9 12.4 1. 5 8 195 5.9 0.14 1.5 

8 19 55 4.2 19-22.2 155- 4.8 13.2 8 194 9.1 0.08 1.7 

8 22 45 27.6 19-19.6 155- 7.3 6.1 1.5 10 206 6.2 0.33 7.2 

8 23 .31 51.1 19-17.4 155-14.1 15.5 1.5 8 236 7.6 0.29 1.6 

8 23 34 54.0 1<)-20.6 1'55-10.8 10.6 1.4 9 188 2.1 0.09 0.9 

9 a 4 21.8 19-21.6 155-16.2 33.1 2.8 22 125 1.5 0.14 0.9 

9 0 40 23.1 lq- 3.2 15.5-20.41 0.0* 2.3 11 226 21.4 2.66 17.3 

9 0 42 16.1 19- 1.6 155-19.5 16.9* 2.1 10 235 30.2 0.34 2.6 

9 0 41 4.4 18-58.3 155-14.8 11.1* 2.3 10 285 .36.9 0.65 4.8 

9 0 48 19.1 19- 4.2 155-20.41 11.7 2.0 13 253 25.6 0.56 2.7 

9 13 27 4.4 19-19.2 1'>5-15.8 1.6 1.1 11 182 3.3 0.19 1.1 

9 13 36 5.1 19-20.4 155- "7.1 5.7 1.5 15 182 5.8 0.15 1.7 

9 14 46 15.4 19-20.9 155-10.3 6.7 1.4 11 230 1.8 0.26 1.5 

9 18 16 36.4 19- 2.6 i5S-l8.t 3.4 2.2 5 231 32.5 

9 21 -JO 30. 1 19-21.4 155-13.8 9.7 1.3 10 149 2.8 0.14 1.0 
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

SEP 9 23 3 44.6 18-59.8 155-26.2 29.4* 2.2 13 244 19.6 0.18 1.6 

10 0 23 7.3 19-22.7 155-22.8 9.0 1.3 15 159 4.1 0.12 0.8 0

10 3 9 3.1 19-13.4 155- 3.3 4.5 1.9 11 267 19.5 0.79 3.7 

10 3 10 20.3 19-10.4 155- 3.01 0.2 2.2 12 211 24.4 1.83 4.2 

10 5 53 4.6 19-21.3 155- 9.3 9.3 1.2 12 186 1.5 0.12 1.0 0

10 6 20 3.1 19-24.0 155-21.1 8.4 1.5 12 131 2.5 0.23 0.6 10 6 20 45.4 19-24.0 155-21.2 9.5 1.4 13 133 2.7 0.08 0.6 0

10 1 32 59. 9 19-21.9 155-10.9 9.8 1.5 16 138 1.6 0.01 0.7 0

10 14 44 54.0 19-19.6 155-16.8 11.4 1.2 8 192 1.3 0.11. 0.5 0

10 20 6 56.8 lq-21.1 155-48.4 4.8 2.1 8 289 38.3 0.33 8.2 7

10 20 32 33.7 19-17.5 155-25.5 1.6 2.0 8 140 6.3 0.21 1.9 

N 10 20 55 41.5 19-24.7 155-17.2 0.0* 0.2 6 96 0.5 0.13 0.1 

10 23 55 29.3 19-24.1 155-16.2 0.0* 0.5 5 217 1.1 0.30 1.2 

11 4 31 48.9 19-20.5 155-13.9 1.9 1.4 10 169 3.4 0.19 1.2 0

11 7 34 16.1 19-21.1 155- 9.8 12.5 1.5 9 263 1.3 0.45 2.2 2

11 10 1 57.9 19-21.5 155-25.1 8.2 2.2 16 83 4.0 0.07 0.7 0

il 11 18 12.3 19-21.4 155-13.3 7.3 1.8 14 153 2.4 0.16 0.9 0

11 20 11 9.6 19-24.• 4 155-24.1 8.8 2.3 14 157 1.7 0.06 0.5 0

12 0 42 0.9 19-22.9.. 155- 7.21 1.8 1.9 14 119 5.3 0.15 1.4 

12 5 53 48.1 19-20.9 155-14.3 30.6 2.1 15 153 2.4 0.15 1. 1 

13 1 52 30.3 19-36.3 156-22.5 8.0* 3.3 21 239156.4 0.26 2.0 

13 1 59 1.5 19-21.4 155-23·.6 8.2 1.6 13 137- 2.4 0.09 0.8 0

13 10 52 22.2 19-24.3 155-22.5 10.5 14 136 5.0 0.06 0.6 0

13 12 19 11.5 19-23.4 155-25.0 11.1 1.5 11 221 6.6 0.18 1.1 0

13 18 16 25.2 19-23.1 155-44.6 15.• 1* 2.6 19 149 20.1 0.11 1.0 

13 19 38 56.1 19-22.2 155-23.8 9.1 2.2 17 74 3.7 0.06 0.6 0

13 20 18 12.3 19-22.6 155-24.1 9.8 1.0 12 191 4.1 0.11 0.7 0

13 23 16 2.9 19-21.2 155- 1.3 4.3 1.7 14 118 15.2 O.ll 0.7 0

13 23 33 53.4 19-21.8 155-25.2 8.2 1.3 15 116 4.4 0.09 0.8 0

14 2 23 26.0 19-24.9 155-23.5 9.2 1.6 14 173 6.9 0.08 0.6 0
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR SEC LAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH 

SEP 14 4 52 9.4 19-20.1 155-11.0 10.9 1.5 10 191 3.5 0.12 1.6 

14 5 39 13.4 19-28.6 155-51.1 8.0 2.3 11 158 7.g 0.11 3.2 

14 6 6 58.3 19-22.5 155- 5.8 14.2 1.4 8 335 1.4 0.19 1.5 

14 11 48 55.0 19-35.1 156-31.0 8.0* 3.1 12 318144.0 2.28 13.1 

14 23 48 51.1 1<)-21.5 155-25.3 8.5 1.5 14 116 4.2 O.Oq 0.8 

15 8 12 16.0 19-28.1 155-28.9 6.9 2.4 13 154 10.2 0.19 1.2 

15 18 28 54.6 lq-25.6 155-21.8 9.2 1.8 16 143 11. 1 0.11 0.8 

15 19 6 9.2 19-22.6 155-23.6 9.1 1.9 16 13 4.4 0.05 0.5 

15 22 52 42.3 19-19.6 155-13.6 10.2 1.9 18 170 5.0 0.08 0.8 

15 23 6 11.1 19-22.2 155-24.7 8.2 1.6 15 116 4.5 0.09 0.8 

16 3 21 56.3 19- 8.2 155-15.0 59.8 2.1 17 212 19.0 0.47 1.9 

tv 16 3 43 1.3 19-21.5 155-13.9 10.5 2.0 17 144 2.4 0.07 0.6 

L11 16 5 8 6.6 19-21.1 155-14.1 10.4 1.8 16 141 2.1 0.06 0.6 

16 18 17 55.6 lq-25.2 155-28.8 5.0 1.8 14 192 12.8 0.18 1. 1 

16 23 3q 13.6 lq-23.6 155-25.3 10.5 1.8 1.3 204 7.1 o. 10 0.6 

17 4 25 24.5 19-21.0 155-12.4 8.2 1.9 11 164 2.9 0.12 0.9 

17 8 20 18.5 19-22.8 155-23.8 9:3 1.6 14 140 4.8 0.08 0.7 

17 20 2 7.1 19-23.4 155-26.5 11.3 2.6 19 80 8.2 0.06 0.5 

18 3 25 12.6 19-18.3 155-25.6 6.2 1.8 15 122 5.4 0.10 0.8 

18 12 LO 31.3 19-21.2 155-13.1 13.3 1.2 LO 156 3.1 0.13 0.6 

18 15 40 8.4 19-24.4 155-15.51 1. '3 0.6 q 240 2.9 0.46 2.1 

18 1'1 42 26.6 19-40.4 155-54.51 to.1 2.3 9 281 49.0 1.24 9.8 

18 19 15 41.4 19-21.6 155-25.11 10.6 1.2 14 115 4.0 0.11 1.0 

18 19 2.3.6 19-21.0 155-20.0 1.3 0.9 10 98 4.8 0.10 0.5 

18 19 46 10.9 19-11.1 155-38.2 7.0 2.0 9 237 14.0 0.16 1.0 

19 0 28 3j.9 19-21.3 155-15.3 11.1 0.8 9 140 1.0 0.19 0.5 

19 0 59 28.4 lq-24.2 155-25.9 8.1 1.7 15 128 8.7 0.09 0.7 

1q 7 8 17.3 19-18.2 155- 6.5 9.1 1.8 11 220 q.l 0.28 2.0 

19 7 18 59.1 19- 1.0 155-23.6 8.3 2.3 15 211 34.8 3.5 

19 7 21 53.6 19- 8.6 155-27.1 31.9 1.8 8 262 21.0 3.34 1;?5 2
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG GAP OMIN ERT ERH E

SEP 19 1 23 34.1 19- 1.5 155-26.21 36.7 2.1 12 214 19.5 0.20 1.7 2

19 1 21 16.9 19- 9.6 155-28.91 38 •. 3 1.7 8 180 17.3 0.34 1.8 1

19 1 38 49.9 19- 5.4 155-19.91 16.8* 1.8 1 262 21.9 0.12 4.9 

19 1 40 28.6 19-19.5 155-33.5 0.5 2.0 1 182 26.2 1.89 2.3 9

19 9 52 43.6 19-18.0 155- 9.2 7.2 1.6 9 216 1.2 0.31 2.0 1

19 11 13 28.8 19-23.9 155- 1.11 0.1 1.9 13 194 15.6 0.62 1.2 319 12 10 22.6 19-25.3 155-24.4 10.8 1.8 17 124 1.1 0.05 0.4 0

19 17 13 28.8 19-22.3 155- 9.4 9.0 1.1 12 166 1.4 0.12 1.4 0

19 11 45 40.8 19-21.3 155-12.3 9.1 2.2 18 156 2.3 0.06 0.6 0

19 11 48 41.2 19-20.1 155-11.1 14.9 1.5 8 237 3.6 0.10 0.6 0

19 23 3 45.1 19-20.2 155-16.1 31.8 2.8 22 151 2.2 0.11 0.7 1

N 19 23 12 18.7 19-19.6 155-14.3 10.2 1.0 16 183 4.4 0.06 0.5 0

0\ 19 23 24 6.0 19-18.6 155-13.7 13.2 1.4 9 216 6.6 0.21 1.2 2

20 0 19 2.8 19-21.3 155-13.6 13.6 1.2 9 154 3.2 0.18 0.1 1

70 3 46 31.1 19-21.2 155-12.5 14.9 1.4 9 165 4.6 0.08 0.7 0

20 4 46 56.6 19-21.2 155-25.5 8.9 1.4 12 123 4.3 0.13 1.0 120 7 4 46.6 155-17.3 31.4 2.0 8 208 6.0 0.29 1.1 2

20 10 20 11.1 19-58.9 156- 0.3 40.4 3.4 23 112129.3 0.16 1. 1 320 13 16 10.1 19-22.6 155-31.31 10.1 2.3 15 118 14.3 0.13 0.9 1

20 1.4 39 24.1 19-27.5 155-25.5 8.3 1.1 13 238 5.7 0.15 0.8 0

20 23 3 53.5 19-18.8 155-14.1 1.8 1.3 10 207 5.9 0.27 1.5 1 

21 0 44 21.0 19-2.0. 1 155-11.6 8.1 1.6 11 195 3.5 0.16 1.2 0

21 1 26 36.1 19-2·0.0 155-12.3 10.0 4.4 22 171 4.6 0.11 1.0 0

21 1 33 0.6 19-20.5 155-12.9 9.0 2.1 20 161 3.8 0.08 0.1 0

21 1 40 31.5 19-21.3 155-12.7 9.6 2.0 17 153 2.2 0.06 0.6 0

21 2 11 46.6 19-21.2 155-12.7 9.7 1.6 16 164 2.5 0.08 0.7 0

21 2 19 55.1 19-21.4 155-12.6 8.9 1.9 16 151 2.0 0.09 0.7 0

21 3 7 46.1 19-21.5 155-13.0 9.5 1.7 16 146 2.0 0.08 0.7 0

21 4 9 .31. 1 19-21.4 155-13.5 7.4 1.5 11 151 3.2 0.12 0.8 0

21 4 14 52.9 19-21.0 155-13.0 9.7 1.1 16 166 2.9 0.08 0.1 0
SUMMARV [JF SEISMIC EVENTS

1910 HR MN SEC lAT N LONG W DEPTH MAG GAP OMIN ERT ERH 

SEP 21 5 59 0.9 19-22.4 155- 8.9 6.5 2.1 16 168 2. "3 0.13 1.0 

21 8 6 37.4 19-24.9 155-18.1 15.0 2.2 8 88 1.0 0.10 0.8 

21 8 6 40.3 19-27.9 155-14.2 5.6 2.4 6 1·61 1.6 0.13 0.5 

21 11 22 40.3 19-10.8 155-39.1 9.5 15 216 8.3 0.24 2.1 

21 13 45 55.1 19-20.1 155-11.7 14.2 1.8 10 193 3.6 0.21 1.4 

21 14 43 52.3 19-15.9 155-15.1 9.7 1.8 10 225 6.5 0.25 1.5 

21 14 55 24.0 19-16.2 155-15.9 9.5 12 221 5.8 0.21 1.3 

21 15 14 58.3 19-21.9 155-12.4 9.4 1. 7 17 139 1. 1 0.07 0.1 

21 15 21 31.9 19-21.2 1'55-13.2 9.9 1.6 15 158 2.6 0.11 0.8 

21 15 28 52.4 19-19.9 155-11.6 15.3 1.8 9 215 4.5 0.16 1.4 21 16 28 46.7 19-37.2 155-11.7 13.8* 2.1 8 252 23.7 0.10 0.9 

N 71 11 13 15.0 19-12.7 155-32.8 8.1 2.4 9 133 8.5 0.13 1.3 

'-J 21 19 54 49.8 19-21.2 155-12.9 9.4 1.8 15 154 4.4 0.08 0.7 

21 21 7 37.4 19-20.8 155-12.8 9.3 2.1 18 163 3.2 0.07 0.7 

71 22 35 26.3 19-15.8 155-15.11 8.1 3.0 23 182 7.4 0.23 1.3 

22 1 49 13.4 19-52.8 155-14.4 18.0* 18 212 45.2 0.13 1. 1 

22 2 5 31.3 19-20.9 155-13.1 8.9 1.8 18 159 3.2 0.09 0.7 

22 3 12 28.8 19-28.9 155-55.2 9.4 2.2 12 213 4.1 0.25 3.4 

22 4 50 42.3 19-21.2 155-13.3 9.0 1.5 16 153 2.8 0.12 0.9 

22 7 20 38.2 19-32.0 155- 5.9 9.q 2.0 17 159 20.1 0.69 0.1 

22 7 26 22.7 lq-16.4 155-15.9 8.1 1.7 13 220 5.5 0.23 1.4 

22 1 29 24.0 19-19.5 155-15.9 8.3 1. 5 14 171 2.8 0.12 0.9 

22 8 32 5.5 19-22.6 155-17.6 17.8 11 8"1 2.0 0.11 0.8 22 9 30 13.5 19-20.6 155-12.1 6.7 1.4 9 180 5.0 0.18 1.1 

22 11 15 22.8 20-15.0 155-43.4 8.0* 3.4 20 115132.3 0.08 1.0 

22 18 48 51.2 lq-29.3 155-25.9 10.0 1.9 10 191 4.6 O. 10 0.8 

23 0 50 19.8 19-21.1 155-14.6 7.8 1.5 13 149 1.7 0.17 1.1 

23 2 21 35.6 18-55.8 155-24.8 35.2 2.5 12 286 25.2 2.07 8.9 1

23 7 50 32.6 19-22.9 155-17.8 35.9 2.0 7 126 2.1 0.15 2.6 

23 11 46 16.4 19-20.4 155- 9.4 8.6 1.5 13 194 2.8 0.12 1.0 
SU,.,MARY OF SEISMIC EVENTS (CONTINUEO)

1970 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERT FRH 

SEP 23 12 33 2l.1 lQ-20.8 155-12.2 13.0 1.5 12 167 1.1 .0.09 0.9 

23 11 38 27.8 20-17.0 155-52.4 31.9 2.8 19 163138.2 0.14 1.3 

23 17 39 9.6 20-15.6 155-54.6 35.8 2.8 19 157137.3 0.13 1.1 

23 18 33 5.8 19-24.0 155-11.2 14.1 1.8 16 98 1.3 0.06 0.6 

23 18 .33 54.1 19-24.6 155-16.9 14.7 2.5 16 99 0.6 0.06 0.5 

2.3 21 45 1.1 19-21.1 155-12.9 9.1 1.1 15 155 2.6 0.11 0.8 

24 3 17 46.9 19-23.0 155-15.3 2.9 0.1 8 153 1.5 0.09 0.1 

24 4 23 44.9 19-17.3 155-20.7 9.3 1.7 13 157 3.9 0.08 0.1 

24 4 50 13.6 19-20.1 155-13.9 9.9 1.3 10 118 3.9 0.13 1.0 

24 6 14 27.1 19-22.0 155-23.1 8.1 1.3 11 III 3.3 0.12 0.9 

24 1 37 37.8 19-19.3 155-14.8 10.0 1.2 11 181 4.7 0.15 1.2 

N 24 13 8 59.1 19-21.3 155-13.0 7.3 1.5 12 159 2.5 0.16 1.0 

ex> 24 16 15 13.6 19-24.4 155-25.41 11.7 12 151 8.6 0.08 0.5 

25 0 59 43.1 19-23.8 155-21.1 11.0 1.8 12 156 9.4 0.12 0.8 

25 1 18 46.6 19-10.7 155-24.8 14.6* 1 199 17.2 0.29 3.2 

25 2 19 16.3 19-24.1 155-24.2 10.0 2.3 11 14 7.3 0.04 0.4 

25 3 58 18.5 19-23.5 155-28.2 8.5 1.3 11 137 10.4 0.14 1.1 

25 4 55 58.1 19-21.1 155-29.5 9.1 12 138 11.2 1.0 

25 6 21 55.0 19-25.3 155-29.3 11.0 1.5 8 150 13.3 0.09 0.6 

25 8 28 13.9 19-24.5 156- 1.0 9.7 2.3 12 286 15.9 1.88 10.7 

25 8 29 43.1 19-21.3 155-12.7 9.7 15 160 2.3 0.06 0.7 

25 13 0 15.0 19-20.2 155-26.0 1.5 1.9 13 114 4.8 0.09 0.8 

25 11 15 1.1 19-20.9 155-16.2 33.1 2.7 18 137 2.6 0.13 0.9 

26 3 15 42.3 19-28.9 155-50.21 1.9 2.4 10 153 10.0 0.29 7.0 1

26 6 3 b.2 19-22.8 155-22.6 9.8 2.2 17 10 4.9 0.05 0.5 0

26 13 51 55.6 19-24.9 155-25.21 10.9 1.4 14 l26 9.3 0.06 0.6 

26 14 32 29.4 19-18.4 155-12.9 5.8 1.0 14 198 1.5 0.19 1.2 

26 14 37 17.6 19-25.0 155-21.0 10.4 3.4 19 59 10.9 0.09 0.1 

26 15 43 50.7 19-21.2 155-13.3 9.1 1.1 15 151 3.7 0.13 0.9 

26 15 44 14.1 19-28.7 155-28.2 13.2 2.0 11 285 8.9 0.41 2.5 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC L.A T N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

SEP 26 22 0 51.9 19-11.5 155-29.4 35.0 1.9 16 160 14.9 0.37 1.4 3

27 2 35 13.6 19-20.9 155-12.3 9.7 2.8 19 165 3.0 0.07 0.7 0

21 2 44 32.9 19-20.9 155-11.3 13.9 1.6 9 192 2.9 0.29 1.0 2

27 1 27 16.1 19-20.6 155-10.3 15 • .1 2.1 10 237 2.3 0.32 1.3 2

21 8 37 23.1 19-20.5 155-13.6 10.1 16 163 3.9 0.07 0.6 0

27 9 41 6.1 19-20.6 155-14.9 31.1 2.0 14· 163 2.4 0.11 1.2 1

21 19 "39 6.9 lq-21.1 155-25.5 8.1 2.0 16 95 4.2 0.08 0.8 0

27 22 0 16.1 19-13.9 155-22.3 3.7 1. 3 12 193 11.8 0.15 1.1 1

21 22 1 29.0 19-20.8 155-19.6 2.5 0.9 9 99 4.2 0.08 0.4 0

21 22 45 31.3 19-23.8 155-17.11 3.1 0.5 1 134 1.6 0.88 2.5 4

28 1 46 50.-5 19-28.2 155-16.01 3.4 1.2 8 316 5.9 0.70 3.1 3

N 28 1 58 23.9 19-27.1 155-14.51 8.0* 0.7 7 309 6.0 0.31 5.8 

\0 28 2 76 45.1 19-21.4 155-13.2 14.7 1.2 10 156 2.4 0.10 0.9 0

28 2 51 29.9 19-24.6 155-16.9 0.0* 0.5 5 205 0.5 0.13 0.6 

28 3 18 9.6 19-24.9 155-14.9 3.3 0.8 7 216 3.7 0.5 1

28 4 39 56.4 19-18.8 155- 5.1 4.9 2.4 19 194 9.3 0.21 1.5 1

28 6 46 41.1 19-21.2 155- 9.4 8.1 1.8 15 173 1.4 0.13 1 • 1 0

28 8 18 44.6 19-24.7 155-16.9 0.0* 0.6 7 163 0.4 0.10 0.5 

28 8 27 54.3 19-20.4 155-13.3 9.2 1.1 15 178 4.1 0.13 0.8 028 8 51 51.3 19-11.2 155-33.2 8.2 2.5 16 139 9.1 0.11 1.1 0

28 8 56 28.7 19-21.1 11)5- 9.5 7. i t 13 280 0.9 0.18 1.1 0

28 14 14 54.6 19-21.6 155-16.9 21.4 2.0 14 110 2.2 0.33 1.6 3

28 14 15 11.8 19-22.5 155-16.1 30.5 2.1 12 111 0.3 0.41 1.7 3

28 15 56 15.0 19-19.4 155-24.3 7.8 11 137 2.2 0.12 1. 1 0

28 18 29 45.5 19-18.5 155-13.0 1.5 2.3 18 115 7.2 0.20 1.3 o

28 18 "3D 44.4 19-18.7 155-13.1 14.6 8 219 6.9 0.09 0.8 0

78 18 31 39.7 19-18.6 155-13.1 14.8 1.8 8 220 7.0 0.13 0.9 1

28 19 6 8.0 19-10.0 155-23.0 48.0 2.4 13 244 16.5 0.77 2.9 6

28 21 48 37.9 19-20.5 155-19.9 2.1 10 110 4.5 0.05 0.3 0

29 2 34 15.6 155-15.3 6.1 1.2 12 138 1.2 0.13 0.8 0
SUMMARY OF SEISMIC EVENTS

1970 HR MN SEC lAT N LONG W DEPTH MAG NO GAP OMIN ERT ERH E

SEP 29 4 1 37.6 19-22.5 155-11.8 30.9 2.6 21 65 2.5 0.14 0.9 1

29 6 36 46.6 19-23.0 155-26.6 6.4 2.3 16 98 7.1 0.10 0.8 0

29 1 54 22.0 19-26.0 155-14.6 3.1 0.9 5 320 4.1 2.2 

29 12 30 49.6 19-25.1 155-27.1 11.2 1.9 14 216 11.0 0.08 0.6 0

29 14 44 26.1 19-21.1 155-10.0 1.4 1.7 13 251 1.4 0.16 1.0 0

29 15 59 22.1 19- 8.9 155-36.8 6.6 7 179 9.8 0.18 1.1 1

29 16 29 4.9 1.9-23.5 155-23.3 12.2 1.2 1 219 6.3 0.34 2.0 3

29 16 36 40.1 19-21.4 155-25.3 1.8 1.6 14 118 4.1 0.14 1.0 1

29 18 43 49.0 19-29.3 155-16.5 0.4* 1.1 7 322 7.4 0.70 2.8 

29 19 55 38.8 19-26.4 155-48.8 1.1 2.2 13 155 14.3 0.63 2.2 4

29 22 21 7.3 19-20.1 155-19.5 25.1 1.6 10 95 3.1 0.35 1.4 3

w 30 8 8 21.4 19-23.2 155-24.6 5.2 2.3 8 214 6.0 0.12 0.6 0

0 30 10 8 12.9 19-20.3 155-14.2 9.9 17 16'3 3.4 0.07 0.6 0

30 14 22 52.4 lq-19.2 155-15.5 11.8 11 183 3.6 0.09 0.5 0

30 21 51 18.8 19-45.0 155-17.11 43.3 2.2 9 261 18.1 6.3 

30 21 59 52.1 19-20.9 155-12.3 9.8 1.5 12 114 2.9 0.07 0.6 0

30 22 6 28.5 19-21.1 155-12.4 0.3 0.1 -1 149 1.4 0.13 0.5 2
Table 3.--Felt Earthquakes

Hawaii Standard

Time

Location of

Date H M S Magnitude Felt Report

Jul 10 21 40 12.48 3.2 Ka1apana

10 21 52 32.36 3.1 Kalapana

15 16 12 19.59 3.5 Hilo

21 22 46 34.14 2.9 Kealakekua

22 16 15 58.12 3.8 Paauilo, Papaikou,

Honokaa

Aug 4 21 45 46.84 2.8 Kapapala Ranch

7 10 23 08.00 3.7 Paauilo, Paauhau, Honokaa,

Hilo, Pohakuloa, Waimea

16 07 41 53.13 4.4 Hi10

17 23 28 00.52 3.5 Kapapa1a Ranch

Sep 21 01 26 36.11 4.5 Island-wide

26 14 37 17.65 3.4 I<.apapala Ranch

Acknowledgements: Several people felt earthquakes during the third

quarter of 1970 and reported their observations to HVO; that information

is gratefully acknowledged.

31
JUL 70 SEPT 170

+

.. +

. +

+ .. + . .. + .. t+

'+1

+

• -I-

+ .

+..

"t- •

. +

. +

..+

t5.

.+. -+6 0 6· .:. ...

: • \ • ~. : () I ~6" ;

+ • I •••::: .. : ••-+ ••• • + .. .. I· ••••• + +. + .:,..~... . . + ..... ~+ +;... +

~+ +\ .•..• .. .:!' .A.: + • ~: s

+ + + ~. A

+ ...

+ +

..x

+

o

+ a

19 10.0

Magnitude

Interval

4.0 < M 5.0

3.0 <. M 4.0

2.0 <. M 3.0

· M 2.0

Symbol

•

X

+

..

__-=::::J_-==-__5 Km.

+

.......

U1

Ul +

W +

0 +

.. +

0

19 10 .0

Figure l.--Plot of epicenters in the Kilauea region. Triangles are

seismometer locations. Kilauea Caldera and the major pit craters

on the east rift are shown in outline. The Pacific Ocean lies

in the lower right portion of the illustration.

32
10 .01 10. ~-'-';~--"""';"---r---",,-----'-r------,--~---,....----,

10'

103

.1 I

Fr.quency (Hz)

10 100

Figure 2.--Response curve for System II, EV-17, Teledyne seismic

preamplifier.

33
Table 4 8 .Seisnlonleter stations in i operated by .Geolo1!:ical

STATIOfJ

car·JE PEAK

S'T 0 r:

HtllE POHAKlJ

lilllfJl\ Pt\LI

KIPtJ t /\ N[ tJ[

LA. VA FLOt·J

L0:<I EPST.1\ T I a1'1

!--'1l\ UN ;\ LQ

LOA x

!·1.!\ PU r

:'JORTli PIT

')UTl[T

PUU IfONUAUl/\

PUU HUlUHUlU

r [): i ! NU

PIT

CODF

.I\HtJ

CPK

DES

EKO

i·IPU

HLP

K-PN

lAF

LOS

;:iLO

f:1LX

;·:lPR

NPT

OTL

L'l\O

\·JPT

LAT- r:J

19 2 2 tt.O

19 2"3. 7.0

19 20., 2.0

19 22 e 17

19 '-l6.8,5

19 1 7 s g,o

1g 1

19 20" 10

19 28 c 7.0

I 2 8 n

19

13 27 e 5.0

1.9

1g 24. 9.0

1.9 23 c 3.8

19 2 3 9.0

1 9 2 2 4.5

1J 3 6.n

13 24 e 7.0

15515 8 9.0

155

155 23_ 3.0

155 14.9.9

155 27" 5,0

15518.6.3

155 37.,1.0

155

53 .. 8,0

53.11

155 23 c; 3.1

155 20 c 7.0

15 5 Q

15 5 17-. '),0

155 16.9.4

154 53 Q 1l.O

155

155

155 17 w 5.J

ElEV

1070

1038

815

1'l[l1

707

1939

9

210

lSn

2CI0

1475

1115

1038

215

425

1115

TYPE

3

3

3

3

1

3

1

3

1

1

1

3

1

3

3

1

3

vee RADIO

2 '3 1

1_ 3.4

5. G. 1360 11 FG

6. (\ 20 'J0

7, 1701

3.4

6.5 136n

3.4

Se 7 _"27::!Q

1.

:>.-

"

\....

272')

T r')O 

T r() 

Joo d - 

0 0 d - 

'.!::l() 0 - 

:OI)·J 

! .,

J .. i.

1. ('

Oe 3.4

4Ii

0.5.E

'." e 7

1 G I),

Oe; 71

1., a..

1 ",

1 f\

.L tit '.:

1.

,__

"

·d.

2

.J

3

4

o

2

2

2

3

.:>

3

n

·

..i

3

2rJ J.J

2090

2090

20

20

2:)

7 n

505

50S

505

76

12 ftf)

124Q

40

1240

1240

124')

15.01

15. 0,0

15" n.a

5.. 3,!)

5.3.a

26) 0. 0

55 It 3.0

55 G) 3.1

Q

17 6.0

17

17.

1 7'., 5.a

17" 5.')

17 (J 6.0

156

15G

15p

155

155

15!i

155155

155

155

lS8

155

155

155

155

155

155

4G.0.0

45 s 0.0

0,0

43 2.0

2.0

IJ 3.

1 11 9.0

31.

31.., 2.1

31_ 2.()

25

5 4.')

25.40

'2 5e 40

1 g 5 tr f')

], g 5" It 0

19 25" 4.0

S[ I: Sf:l0GRf\PflS

H/\L 20

2a

HAN 2Q

!! ILlJ

HIE 19

HIN 19

20

KLK 19

KLE 19

Kl.N In

KIP 21

11

lJ.SZ 19

USE

OPTIC/\L

dA Z

l E/\ f.. l A E

:L'\ t. E/\ .'\ Ll\ r S

HILO

q I L'O r:',)

LO us

KAi··itJELl\

K'= l\ L,\KEKU1\ Z

t: ./'... L,\KrK!J Et J

NS

K' P/\p·,\

Z

U ..t K..\ tJ Z

lJ 'I E J l ,N.., E'I·J

l.' FK," U,...J t. PEZ

P!:E

U\.. PErl
Table 5.--Seismic Instrumentation

1. SEISMOMETERS

EV-17

EV-17H

HS-IO

HVQ-2

2. SEISMOGRAPHS

HVO-I

15-90

Electrotech EV-17 1.0 sec period moving magnet vertical

component seismometer.

Same as above, but horizontal component.

Hall-Sears 0.5 sec period moving coil seismometer.

0.8 sec period moving coil seismometer.

Vertical-component electromagnetic seismograph with a

peak magnif.ication of about 20,000 at 0.25 sec.

Press-Ewing System: 3-component long-period Press-Ewing

seismograph system with pendulum and galvanometer

periods of 15 and 90 seconds, respectively.

EV-17/3.5 cps galv, EV-l7 H/3.5 cps galv, etc. Short-period electromagnetic seismographs composed of the seismometers and

galvanometers indicated. Response similar to HVO-l.

Poorly calibrated.

3. AMPLIFIER AND SIGNAL TRANSMISSION SYSTEMS

System I HVO-built solid-state seismic preamplifier (voltage

gain, 200x), direct signal transmission over hard wire

to HVO, HVQ-built solid-state amplifier and galvanometer

driver.

System II Develco or Teledyne seismic preamplifier--voltage controlled

oscillator, signal transmission on audio FM carrier

over hard wire or FM radio link to HVO, discriminator

Geotech PTA Short-period Geotech photo-tube amplifier.

4 • TIMING SYSTEMS

RM~USGS

TS-IOO

Crystal-controlled chronometer employing solid-state

binary dividers to produce minute and hour marks. Typical

drift ~ates are a few milliseconds per day.

Sprengnether crystal-controlled chronometer. Output

and performance characteristics are similar to those

of RM-USGS.

35
5. TELEMETERED SYSTEM RESPONSE

The peak magnification of the standard telemetered systems

(Systems II, with the film strip magnified 20 times for viewing)

5 is about 2 x 10 at a period of 0.1 sec. For periods between 0.1

and about 1.0 sec, the response falls off 6 db/octave (fig. 3).

36
TILTING OF THE GROUND AROUND KILAUEA CALDERA

Tilting of the ground around the summit of Kilauea is monitored

daily by a short-basewat.er-tube tiltmeter in the Uwekahuna Vault;

weekly results are summarized in Table 6. At irregular intervals tilt

is measured on a regional scale by means of a network of field tiltbases and a portable water-tube tiltmeter, and these results are

summarized in Table 7. The attitude of the ground surface at each

tilt-base is reported in terms of north-south·· and east-west tilt

coordinates. Both coordinates at each station were arbitrarily set

equal to 500 when measurements at that station we~e begun. Increasing

tilt coordinates corr·espond to~ northward and eastward 'tilting of the

earth's surface; that. is, to a relative subsidence toward the north

and east. A one-unit change in coordinate corresponds to a tilting

of 1 microradian (1 rom per km) in· the direction indicated.

Location of tiltmeter stations and essential data on each station

are listed in Table 8, S~ary 57.

Table 6.--Tilt Coordinates at Uwekahuna Vault,

July, August, and September 1970

Date N-S E-W Date N-S E-W

July 5 559 380 Sept. 6 562 366

12 559 380 13 562 366

19 559 380 20 561 367

26 560 382 27 561 366

Aug. 2 560 380

9 560 379

16 561 380

23 562 379

30 562 370

37
Table 7.--Tilt coordinates and changes at long-base tilt station around Kilauea Caldera (S

-6 Rate (10 rad/mo)

and Direction of

Date Tilt Coordinates Tilting Since Date of 

Tilt Base (1970) N-S E-W Last Reading Reading 

Uwekahuna (U on fig 4) 9 sep 624.4 338.1 2.16 N52.3°W 22 

Tree Molds (TM) 9 Sep 494.0 492.0 1.27 N47.8°W 18 

Sand Spit (SS) 10 Sep 1039.0 601.1 0.37 S48.3°W 20 

Keamoku (Kea) 10 Sep 542.6 362.7 1.35 N78.2°W 20 

Ahua Kamokuko1au (Kam) 11 Sep 333.2 508.9 8.87 Nl5.3°W 21 

Kipuka Nene (KN) 11 Sep 293.5 503.9 0.69 N41.9°W 21 

Hilina Pali (HP) NOT REA D T HIS E poe H

Kapapa1a Ranch (Kap) 10 Sep 486.9 518.1 0.24 N49.1°W 20 

Mehana (M) 9 Sep 591.8 597.7 1.27 N50.5°E 18 

'.
.0

2000~

..........

TILTING RATE 2.5 X' 1,0-6 RADIAN~/~ONTH

5 K M

cr

o

Figure 3.--Tilting of the ground around Kilauea Caldera between May 18, 1970,

and September 9, 1970. The vector depicting tilting at a given tilt

base points in the direction of maximum relative subsidence and has

a length proportional to the rate of tilting during the measurement

interval. Closed circles represent field tilt bases; open circle,

short-base water-tube tiltmeter (See Table 7 for explanation of

abbreviations).

39
REFERENCES

Anderson, L.A., Jackson, D.B., and Frischknecht, F.e., 1971, Kilauea

Volcano - Detection of shallow magma bodies using the VLF and ELF

induction methods: Am. Geophys. Union Trans., V. 52, No.4, p. 383.

Eaton, J.P., 1962, Crustal structure and volcanism in Hawaii: Am. Geophys.

Union Geophys. Monograph 6, p. 13-29.

Hamilton, R.M., Smith, B.E., Hall, J.e., and Healy, J.H., 1969, Summary

of seismic activity in the Pahute Mesa area, Nevada Test Site,

December 1968 - June 30, 1960: u.s. Atomic Energy Comm. (USGS-474-S8):

Springfield, Va., Clearinghouse for Fed. Sci. and Tech. Info., 63 p.

Peterson, D.W., 'and Swanson, D.A., 1973, Observed formation of lava tubes

during 1970-71 at Kilauea Volcano, Hawaii: Studies in Spe1eo1ogy,

V. 2, Pt. 6.

Swanson, D.A., 1973, Pahoehoe flows from the 1969-71 Mauna DIu eruption,

Kilauea Volcano, Hawaii: Geol. Soc. Am. Bull., V. 84, No. 12.

Swanson, D.A., Duffield, W.A., Jackson, D.B., and Peterson, D.W., 1972,

The complex filling of Alae Crater, Kilauea Volcano, Hawaii: Bull.

Volcanologique, V. 36.

Swanson, D.A., Jackson, D.B., Duffield, W.A., and Peterson, D.W., 1971,

Mauna DIu eruption, Kilauea Volcano: Geotimes, V. 16, p 12-16.

Swanson, D.A., and Peterson, D.W., 1972, Partial draining and crustal

subsidence of Alae lava lake, Kilauea Volcano, Hawaii: ' U.S. Geol.

Surv. Prof. Paper 800-C, p. 1-14.

•

...

40 '{.l' GPO 692.852
UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

Hawaiian Volcano Observatory

Sununary 60

October, November, and December 1970

By

Robert Y. Koyanagi, Arnold T. Okamura,

and Pat Stevenson*

Trilateration Network on Kilauea, Fall 1970

By

Donald A. Swanson and Reginald T. Okamura

OBSERVATORY STAFF

Geology

w. A. Duffield

D. W. Peterson (Scientist-in-Charge)

D. A. Swanson

Geophysics

K. T. Honma

D. B. Jackson

George Koj .ima

R. Y. Koyanagi

A. T. Okamura

Geochemistry

R. T. Okamura

Support

J. C. Forbes

w. H. Francis

J. B. Judd

M. S. Onouye (Mrs.)

M. K. Sako

Akira Yamamoto

*Office of Earthquake Research and Crustal Studies

Menlo Park, California
Tables (Continued)

Page

Table 7. Tilt Coordinates at Uwekahuna • 60

8. Tilt Coordinates and Changes at Bases

Around Kilauea Caldera. •. ••.. 61

9. Complete and Corrected Tilt Coordinates at

All Tilt Bases Around Kilauea Caldera • 63

ii
CONTENTS

Page

Chronological Summary. • • • • • • • •

Trilateration Network on Kilauea, Fall 1970.

Seismic Summary •••••..

Tilting of the Ground Around Kilauea Caldera

References .

I

3

13

60

69

Publications of Special Interest and HVO Contributions,

1970. . . . . . . . . . . . . . . . . . . .. 70

Illustrations

Figure 1. Sketch map showing approximate location of

major events in the Mauna Ulu area. 4

2. Kilauea Trilateration Network, Fall 1970. 5

3. Locations of previously existing triangulation

stations occupied in the- 1970 trilateration

survey. • • • • • 6

4. Epicenter Map . 56

5. Response curve for System II, EV-17, Teledyne

seismic preamplifier. . • • • • • • •. 57

6. Tilting of the Ground Around Kilauea Caldera.. 62

Tables

Table 1. Final 1970 geodimeter measurements, in meters,

reduced to sea level. • • • • • • • • • • • 8

2. Number of earthquakes and minutes of tremor 14

3. Summary of seismic events • • 18

4. List of felt earthquakes. • 55

5. U. S. Geological Survey seismograph stations

in Hawaii • • . • • • . • • • • • 58

6. Seismic Instrumentation 59

i
CHRONOLOGICAL SUMMARY

The Mauna Ulu eruption continued throughout this quarter following

basically the pattern developed in August 1970. A pool of lava, slowly

circulating from west to east, persisted in the summit fissure of Mauna

Ulu but did not overflow. The surface of this pool was generally 15 to

25 m below the rim but occasionally dropped to 30 m arid once, on

December 5, rose to within 6 m of the rim. Weak spattering was nearly

continuous at the east end of the pool, 'and brief episodes of low

fountaining related to transient degassing took place in other parts

of the pool. The fissure walls collapsed markedly, and the fissure

widened by more than 20 m in places as a result of such collapse,

especially in December.

A chain of several vents, some briefly active and others more persistent,

extended down the east flank of Mauna Ulu to a point just north of the

north rim of Alae. These vents, probably large skylights in an underground lava stream connected to the summit fissure, overflowed at times

feeding small short-lived flows. Some of these flows entered ·the

subsidence bowl in Alae, piling up and creating a lava fan that partly

filled the bowl (Swanson and Peterson, 1972). More commonly, the vents

did not overflow, but lava or a distinct glow could be seen within

them at depths of several meters. When the lava could be seen clearly,

a distinct eastward current was discernible. Five collapse pits, or

large skylights, formed along the chain of vents on October 26,

November 5 and 13, and December 8 and 20; these pits were as much as

40 m in diameter (Figure 1).

For most of the quarter, lava continued to flow through a tube from

the eastern end of the chain of vents into the Alae holding reservoir.

From Alae, the lava flowed through a tube system as far as the flat

below Holei Pali. This tube system and the relation of the Alae

reservoir to it are described by Swanson (1973) and Swanson and

Peterson (1972). No lava entered the ocean during this period.

A brief but significant change in this overall scheme of activity

took place between October. 26 and November 2. Flow in the tube system

stopped on October 26, and the only visible lava was in the 'collapse

pit that formed on that day and in Mauna Ulu's fissure. This pause

was accompanied by swelling of the Kilauea summit area and a swarm of

shallow caldera earthquakes. Apparently, a blockage had developed

somewhere in the Volcano's plumbing. However, the swelling caused by

this blockage was relieved on October 28 when copious overflows began

from most of the vents on Mauna Ulu's east flan~, summit tilt dropped

slightly, and the caldera quakes stopped. Flows fed by these and

related overflows during the next several days ultimately reached as

far as the area due north of Kane Nui 0 Harno. During this time, lava

in the new collapse pit participated in a cyclic rise-fall (gas-piston)

cycle like that which has characterized the Mauna Ulu summit vent

throughout the eruption. Finally, lava reentered the tube system

connected with Alae on November 2 and the prevailing pattern was

once more reestablished.
For much of November and December, lava in the collapse pits of October

26 and November 13 (only 100 m apart) (Figure 1) took part in a rise-fall

cycle that demonstrated a connection between them. The two pits were on

a nearly synchronous schedule, except that the eastern pit, 10 m lower

in elevation, would begin to overflow sooner than the upper pit.

On November 29, a new collapse area formed near the site of the November 13

pit. By late December it reached 230 m in length, 35 m in width, and more.

than 15 m in depth. Lava in this collapse trench was observed to feed

the inlet tube to Alae. Between December 6 and 8, overflows from the

October 26 pit spilled into the trench nearly filling it with thin flows

that quickly solidified. However, another collapse event on December 8

reestablished the November 13 pit at the west end of the filled trench,

and a pool of molten lava occupied this new pit. On December 13 the

vigorous· subsurface flow of lava between these pits and Alae stopped,

although some flow probably continued into Alae through a deeper tube.

A sulfur-encrusted cone 100 m from the summit fissure collapsed, leaving

a pit 20 by 35 m in diameter. From December 21 to 24, a very active

stream of lava flowed eastward beneath the pits of December 20, October 26,

and December 8 at a depth of 20 to 30 m below the surface. The pi~8

progressively enlarged as their unsupported walls caved into the lava,

especially at their west and east ends. Consequently, the pits became

elongated and began to grow toward each other. On December 31, only

two unstable bridges kept the separate pits from merging into a single

elongate collapse trench (Figure Ib).

2
TRlLATERATION NETWORK ON KILAUEA

The trilateration network 1n Kilauea was expanded during the fall of

1970 to cover most of the vo~cano. This network should provide a base

for monitoring future horizontal deformation of Kilauea. The network'

is shown in Figure 2; in addition, there are many' stations in the

summit area of Kilauea as shown in Kinoshita'and others (in press).

The locations of all previously established stat~ons are shown on

Figure 3; most of these stations are in the 1970'network, but others

were included in our survey only in order to enable comparison with

past surveys. The locations of previous stations are obtainable from

the Topographic Division of the U. s. Geo,logical Survey, and those of

the new stations from the Volcano Observatory.

We attempted to make the survey figures as strong as possible geometrically but geologic considerations along with unfavorable

topography and dense vegetation resulted in many figures being rather

weak. Nonetheless, only six stations are located by the minimal two

distances and these are not critical to the rest of the network.

Most of the network was measured between late August and mid-September

1970; a few distances, chiefly those necessary to tie in previous

surveys, were measured over the following two months. We could not

recognize any significant deformation of Kilauea during this time, so

the network can probably be considered to have been measured virtually

instantaneously. Helicopter support was necessary for work on the

south flank and southwest rift for transport to Kalalua Cone .

.,,, :~

3
o

I 400 ",.t.r. I ,

N

r

Figure la

N

r

Puu Huluhulu

400 ",.t.,. , , o

I

11/13 and 12/8

10/26' ~'1/5 (burled)

12/20" \. ; ~~!oo':"'lava tub. O~ ........--....... pre-eruption

M Ulu 1.."u"lt V f I '~outllne of

fl '•• wld.l.d T h f" , AICIe Crat.r It II r.nc orlNd \ , CO .pI.. by colla,.. \ \

b.t•••n 11/21 \ I

and 12/31', I

" ' ........~~Iava '" tube

~~'Il,

Figure lb

Figure 1.--Sketch map showing approximate location of major events in the

Mauna Ulu area during the fourth quarter of 1970. Figure la shows

configuration on November 20, including location of vents and collapse

craters on Mauna Ulu's east flank and the approximate outline of

surface lava flows which 'extended about 2 km farther east than shown

by the map. Figure Ib shows the configuration on December 31 after

additional pits had' developed, and some had merged to form an

elongated tren~h.

4
KILAUEA TRILATERATION NETWORK, FALL 1970

1

N

Noli

./

Puu Uloula----

/

5

I

o

I

5

I

to

I

15

I

20

I

2

Figure 2.--Distances measured in the Kilauea trilateration network. Many other distan

the summit region (Kinoshita and others, in press) are measured periodically.
• STRIP

KUlANI

•

o

I , ,

• KEAAU

.OLAA

5

, , I

kilometers

10

I

KAlOll 2

.HALONA

• WAIKAHEKAHE

MOANA HAUAE

x

a::

o

z

II

Figure 3.--Locations of all but one previously existing triangulation stations occupied in 

trilateration survey. The missing station, Kaiwiki New, is about 18 km north-northwe

on the lower slope of Mauna Kea. Major structures of Kilauea are schematically shown
The distances were measured once each (rarely, twice) with a

Model 8 Geodimeter. No difference between the three frequency readings,

D1, D2, and D

3, greater than 25 mm was tolerated, and most differences

were 5 to 15 Mm. All measurements were made between 0900 and 1700 (mostly

before 1600) in order to minimize diurnal temperature and pressure changes.

Temperatures at ,both ends of each measured line were obtained from good

quality mercury thermometers shielded from direct sunlight but open to air

circulation. Thetlermometers were suspended about 6 m above ground.

Barometric pressures were determined with high quality Wallace and Tiernan

barometers at each end of the line. Endline temperatures and pressures

were read before and after each shot and were averaged in the final

calculations. A constant humidity correction of 0.5 ppm was applied.

Distances were corrected for beam and earth curvature using the formula,

232 C • (l-K) D /24 R , where D is slope distance in meters, R is earth's radius

in meters, and K is assumed to be 0.20 (Hopcke, 1966; Meade, 1969). Each

distance measured was reduced first to the horizontal at the elevation of

the lower station; the necessary vertical angles were computed from station

elevations known or estimated from 20-!t contour maps. The distances were

then reduced to sea level, following the procedure outlined by Gossett

(1959, pp 234-235)~ Programs were written for a Wang calculator to handle

all the reductions and a summary of the reductions is on file at the Volcano

Observatory. The final reduced distances are given in table 1, which

incluaes all shots in the network as well as those necessary to tie in

previous surveys. No least-squares adjustment of the network internal

consistency was made for we considered it best when comparing triangulation

and trilater~tion data to· use unadjusted measurements.

7
Table 1.--Final 1970 geodimeter measurements, in meters, reduced to sea level.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12 •.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32.

33.

34.

35.

36.

37.

38.

39.

40.

41.

42.

43.

44.

45.

46.

47.

48.

49.

50.

HV0129-Koae1 •

HV0129-Kamakaia

Kau-Hi1ina

Kau-Kamakaia

Kau-Pepeiau

136-Kamakaia

136-Pepeiau

Kamakaia-Mauka 1250

Kamakaia-Puu Ulau1a

Mauka 1250-Puu Ulau1a

Kau-Puu Ulaula

135-Puu Ulaula

Puu U1aula-Puu Nahaha

Puu Ulaula-Pepeiau

Puu Ulaula-Kapapala

PUll U1au1a-Nali

Nali-Pepeiau

NaIi-Mauka 1250

NaIi-Puu Kapukapu

Na1i-Kau

Nali-Goat

Kaaha-Puu Kapukapu

Kaaha-Hilina

Kaaha-Pep~iau

Pilau 3-Hi1ina

Pilau 3-Goat

Pilau 3-Kaena·Pt.

Makahanti Pali-Puu Kapukapu

Makahanu Pali-Hi1ina

Puu Kapukapu-Pepeiau

Puu Kapukapu-Hi11na

Puu Kapukapu-Goat

Puu Kapukapu-Kau

Puu Kapukapu-HV060

Apua-Goat

Apua-Makahanu Pali

Apua-HV060

Apua-Puu Kapukapu

Kaena Pt.-Goat

Kaena Pt.-HV060

Kaena Pt.-PUll Kapukapu

Panau-Laeapuki

Panau-Kaena Pt.

Panau-KaMoamoa (HV0158)

Panau-Pulama

Panau-Hakuma

Panau-Kupapau

Kamakaia-Koae

Kamakaia-Keakapulu

Kamakaia-HV0160

8

4,372.361

6,305.522

2,020.616

5,192.126

4,073.183

3,792.796

1,832.556

6,960.194

12,441.715

5,731.351

14,423.194

9,278.157

3,293.141

10,353.488

4,146.403

6,830.812

5,977.434

4,485.762

13,304.687

9,416.448

19,347.512

6,797.933·

5,339.504

4,446.224

12,859.372

4,366.121

8,048.895

2,736.931

5,556.769

10,141.569

5,431.211

6,521.382

6,910.325

11,470.174

8,238.758

7,836.096

7,230.411

7,171.000

12,273.493

5,548.909

14,528.096

2,978.626

4,552.013

4,522.543

7,813.588

13,638.022

9,408.834

7,916.170

8,821.719

4,564.017
Table 1.--Fina1 1970 geodimeter measurements, in meters, reduced to sea level

(Cont'd)

51. Kamakaia-Puu Nahaha

52. Kamakaia-Kapapa1a

53. Keakapu1u-Kapapa1a

54. Keakapu1u-Puu Nahaha

55. Keakapulu-HV0160

56. Kapapa1a-Puu Nahaha

57. Koae-Keakapu1u

58. Koae-Strip

59. Koae-Kulani

60. Koae-HV0160

61. Laeapuki-Kaena Pt.

62. Laeapuki-Pu1ama

63. Kamoamoa (HV0158) - Pulama

64. Kamoamoa (HV0158) - Laeapuki

65.. Kupapau-Laeapuki .. "

66 • Kupapau;-Pulama

67. Kupapau-Heilaeiahu1u

68.· Kupapau-H_akum~.

69 • Hakuma-Heiheiahu1u

70. Hakuma-Pulatria

71. Hakuma-Moana Hause

72. Moana Hauae-Pu1ama

73 •. Moans Hauae-Heiheiahu1u

74.' HV0147-Heiheiahu1u

75. HV0147-Moana Hauae

76. ,66YY Reset-Heiheiahu1u

77. 66YY Reset-HV0125

78. 66YY Reset-HV0147

79. KaIiu-Ha1ona

80. Ka1iu-Hakuma

81. Kaliu-Moana Hauae

82. Ka1iu-Keaau

83. KaIiu-Kapoho

84. KaIiu-66YY Reset

85. Kaliu-Honuau1a

86. Kaliu-HV0125

87. Ka1iu-KahUwai

88. Ka1iu-Heiheiahulu

89. Papaya (HV0157) - Kahuwai

90. Papaya (HV0157) - Heiheiahu1u

91. Iilewa-Heiheiahulu

92. Iilewa-66YY Reset

93 •. Ii1ewa-HV0146

94. Ha1ona-Keaau

95. Ha1ona~Kapoho

96. Ha1ona-Heiheiahu1u . 97. Ha1ona-Honuaula

98. Halona-Waikahekahe

99 • Halona-Tangerine (HV0148)

100. Halona-Kaloli 2

9

9t 754.445

10,611.925

14 t 380.639

14 t 623.370

.6 t 655.751

1 t 769.620

10,404.766

16,552.115

18,436.152

11,140.506

4,1.77.263

7,639.911

4,512.883

3,232.288

8,029.370

3,587.826

10,913.022

4,394.006

8,741.897

6,461.037

4t 177.272

9,646.205

7,071.189

7,624.278

4,160.641

4,790.289

1,762.606

3,596.809

11,617.347

13,387.104

9,479.827

22,235.425

9,734.721

4,161.570

4,425.810

3,028.773

2,657.955

8,112.779

3,033.904

10,566.079

3,708.644

1,778.787

6,007.179

12,927.696

12,478.057

15,399.656

9,978.639

3,692.674

10,924.808

7,381.488
Table l.--Final 1970 geodimeter measurements, in meters, reduced to sea level.

(Cont'd)

101.

102.

103.

104.

105.

106.

107.

108.

109.

110.

111.

112.

113.

114.

115.

116.

117.

118.

119.

120.

121.

122.

123.

124.

125.

126.

127.

128.

129.

130.

131.

132.

133.

134.

135.

136.

137.

138.

139.

140.

141.

142.

143.

144.

145.

146.

147.

148.

149.

150.

Keaau-Ka101i 2

Keaau-Heiheiahulu

Keaau-T~ngerine(HV0148)

Keaau-Waikahekahe

Honuaula-Kahuwai

Honuaula-Heiheiahulu

Honuaula-HV0149

Honuaula-Waikahekahe

Honuaula-HV0152

Honuau1a-Pohoiki

Honuaula-HV0153

Honuaula~Barn(HVOI59)

Halekamahina(HVOI55)- Rock(HV0154)

Ha1ekamahina(HV0155)- Pohoiki

Halekamahina(HV0155)- Kapoho

Halekamahina(HV0155)- Hon~aula

Halekamahina(HV0155)- Barn(HV0159)

Rock (HV0154)-Pohoiki

Rock (HV0154)-Kapoho

Lighthouse 2 (HV01S1) - Beachlots(HV0159)

Lighthouse 2 (HV0151) - Puu Kukae(HV0156)"

Lighthouse 2 (HV01S1) - Pohoiki

Lighthouse 2 (HV0151) - Kapoho

Beach1ots(HVOISO) - Kapoho

Beachlots(HV0150) - PUll Kukae(HV0156)

Beachlots(HV0150) - Pohoiki

PUll Kukae(HVOI56) - HV0153

Puu Kukae(HVOI56) - HV0152

HV0153-HV0152

Kapoho-Pull Kukae(HV0156)

Kapoho-HV0152

Kapoho-Honuau1a

Kapoho-Pohoiki

Kapoho-HV0149

Ka101i 2-Waikahekahe

Kalo1i 2-Kapoho

Kaloli 2-Honuaula

Tangerine (HV0148)-Kapoho

Tangerine (HV0148)-Honuau1a

Tangerine (HV0148)-Pahoa (HV0161)

Pahoa (HV0161)-Honuau1a

HV0146-66YY Reset

HVQ146-Kaliu

Ma1ama Ki-Kaliu

Malama Ki-Honuau1a

Ma1ama Ki-Kahuwai

Malama Ki-Kapoho

Heiheiahu1u-Puu Huluhu1u

Heiheiahulu-Kulani

Kulani-Keaau

10

10,929.932

21,550.349

18,523.877

10,749.154

2,164.178

12,343.353

3,329.064

11,496.620

7,581.277

6,855.529

5,887.652

2,287.226

1,188.731

4,675.552

2,322.956

3,474.681

3,008.427

3,979.273

'2,377.966

2,745.356

2,"396.645

4,816.418

3,726.131

2,296.709

2,450.312

2,071.758

1t.491.519

1,763.890

1,706.587

1,641.377

3,249.134

5,519.644

2,904.057

3,901.878

9,045.629

17,776.150

16,802.303

14,417.664

8,917.633

5,233.361

7,255.425

4,469.637

4,203.344

5,930.867

"5,057.450

4,061.340

6,745.691

23,349.339

34,125.052

27,984.684
Table 1.--Fina1 1970 geodimeter measurements, in meters, reduced to sea level.

(Cont'd)

151.

152.

153.

154.

155.

156.

157.

158.

159.

160.

161.

162.

163.

164.

165.

166.

167.

168.

169.

170.

171.

172.

173.

174.

175.

176.

177.

178.

179.

180.

181.

182.

183.

184.

185.

186.

187.

188.

189.

190.

191.

192.

193.

194.

195•.

196.

197.

19B.

199.

200.

Kulani-Puu Hu1uhulu

HV0111-Puu Huluhu1u

HVOl11-Strip

HVOII1-Kulani

HVOIII-Keakapulu

POll Hu1uhulu-Keakapu1u

Puu Huluhulu-Strip

Keaau-Honuaula

Keaau-Kapoho

HV0123-66YY Reset

HV0123-HVOl25

Alii-Ku1ani

Alii-Strip

Alii-Kapoho

Kalalua-Kulani

Kalalua-Heiheiahulu

Kalalua-Puu Huluhulu

01aa-Honuaula

01aa-Heiheiahulu

Olaa-Kapoho

Kalo1i 2-Kaliu

Kalal! 2-0laa

Olaa-Keaau

01aa-Kulani

Kulani-Strip

Olaa-Kaliu

Hole! (HV0162)-Panau

Ho1ei (HV0162)-Apua

Ho1ei (HVOI62)-Laeapuki

Holei (HVOI62)-Kaena Pt•.

Keakapulu-Uwekahuna

Keakapulu-Ohale

Uwekahuna-Sand Hill

Uwekahuna-Keanakakoi

Uwekahuna-Ahua Kamokukolau

Uwekahuna-Cone Peak

Sand Hill-Ahua

Sand Hill-Cone Peak

Sand Hi11-Keanakakoi

Sand Hi11-Koae

Ahua Kamokuko1au-Keanakakoi

Ahua Kamokuko1au-Cone Peak

Ahua Kamokukolau-Koae

Ohale-Cone Peak

Ohale-Ahua Kamokukolau

Ohale-Koae

Oha1e-Uwekahuna

Ohale-HVOl11

Uwekahuna-Koae

Uwekahuna-Volcano House Flag

11

19,193.192

5,627.569

20,885.590

19,386.007

17,586.263

22,647.315

23,148.590

22,229.102

25,398.737

1,344'.179

2,085.413

13,541.769

20,358.845

38,144.855

27,761.023

8,271'.285

15,088.731

21,948.322

20,593.275

25,368.791

18,960.631

11,725.933

1,350.354

27,003.954

9,559.139

21,696.355

3,040.039

8,660.297

5,233.460

3,880.220

15,383.470

15,262.753

3,155.613

3,077.184

5,124.748

3,893.306

3,069.590

1,625.521

2,090.594

5,275.225

2,078.123

4,496.031

6,473.669

5,526.5·45

3,319.567

4,857.979

7,854.841

2,332.273

8,178.144

3,075.886
Table 1.--Final 1970 geodimeter measurements, in meter~, reduced to sea level.

(Cant'd)

201.

202.

203.

204.

205.

206.

207.

208.

209.

210.

211.

212.

213.

214.

215.

216.

217.

218.

219.

220.

221.

222.

223.

224.

225.

226.

227.

228.

Ohaikea-Volcano House Flag

Ohaikea-Ohale

Ohaikea-Uwekahuna

Ohaikea-Sand Hill

Ohaikea-Keanakakoi

Volcano House F1ag-Keanakakoi

Kahaha 2-Puu U1aula

Kahaha 2-Kamakaia

Kahaha 2-Kapapa1a

Kamakaia-Strip

Kamakaia-Uwekahuna

Kamakaia-Oha1e

Kaiwiki New-Ku1ani

Kaiwiki New-Keaau

Hakuma 1891-Heiheiahu1u

Hakuma 1891-Ka1iu

Hakuma 1891-Moana Hauae

Uwekahuna-Strip

Uwekahuna-Puu Hu1uhu1u

Uwekahuna-Kulani

Oha1e-Strip

Ohale-Puu Hu1uhulu

Ohale-Kulani

Heiheiahulu-Kapoho

West Heiheiahulu-Kulani

West Heiheiahu1u-Olaa

West Heiheiahulu-Ka101i 2

Ohaikea-Koae

12

8,869.570

10,813.479

5,950.180

6,503.523

8,099.865

3,875.229

9,859.145

13,871.647

6,172.983

21,257.909

15,987.265

11,392.540

31.423.553

18,254.385

8,614.906

13,305.151

4,131.061

13,011.875

10,156.450

11,073.963

19,406.832

7,803.000

18,927.582

17,804.534

34,026.251 .

20,510.533

22,319.040

8,020.553
SEISMIC SUMMARY

Events recorded by the u.s. Geological Survey seismograph network

in Hawaii fall into two categories:

1. Local earthquakes and tremor originating in· the region of the

Hawaiian Islands (usually within 100 km of at least one

seismograph).

2. Distant earthquakes originating more than 3,000 km from Hawaii.

As an index of seismic activity at Hawaiian volcanoes, daily counts· of

earthquakes and minutes of tremor recorded by se~smographs in Hawaii are

listed in table 2. The earthquakes are separated in groups on the basis of

region of origin as determined by the analysis of records obtained daily at

the observatory (WE, MLO, MLX, AHU, DES, NPT, WPT, MPH, KMO, OTL).

Computer locations of well recorded events are listed in table 3. The

location of each seismograph station is listed in table 5, along with a

description of the equipment at each station.

Acknowledgements

Several people or agencies reported "felt" earthquakes during this quarter

of 1970. Their assistance is gratefully ae·knowledged.

13
Table 2.--Number of earthquakes and minutes of tremor recorded on seismographs around

Kilauea Caldera

Tremor is separated into three categories: deep, intermediate, and shallow on the basis o

amplitude on seismographs in the summit region. Unless otherwise stated, tremor is presu

associated with movement of magma within the central complex of Kilauea Volcano.

Earthquake categories are: Kilauea summit: 30 km, earthquakes from a source about 30 km 

summit region; long-period, earthquakes characterized by low-frequency waves that origin

km or deeper beneath Kilauea summit; and earthquakes in the Kilauea Caldera 

deep. SW Rift and Kaoiki: earthquakes along the southwest rift zone of Kilauea and the 

portions of the Kaoiki fault system. Upper East Rift: earthquakes from the upper east r

the adjacent fault. systems of Kilauea's south flank. Koae: earthquakes along the north

Koae fault system south of the caldera. Lower East Rift: earthquakes from the lower ea

of Kilauea.

Tremor oj Earthqwkes

Date (m = minutes) Kilauea Summit . 1/ SW Rift Uppex-- Lowe;l:./ (1970) Inter- Long and .East East

Deep mediate Shallow 30 KM Period Shallow Kaoiki Rift Rift Other

Oct 1 ,.. QS 5 7 222 28 39 2

2 QJ 3 194 21 34 4

3 en til as 12 5 104 22 20 5

4 r-t eu QJ 6 3 450 25 ? 5 

:> ,...

eu QJ 

5 r-t Pot Pot 6 645 12 22 1

6 =' 14 742 31 24 3

7 r-t s:: 0 2 3 789 20 12 2

8 as eu 6 1 381 8 81 2

9 t,)Qerf 7 365 21 II 5

10 =en ..-4 6 443 29 16 3

11 11m +J Q) :> 4 ? 27 ? 4

12 14m ::J..-f +J+J 7 4 548 19 31 -9

13 8m 10m tJ p.. +oJ 4 4 555 28 23 11

14 Q) 6 2 566 12 26 6
15 76m

5

5 523 22 19 14

16

2

3 633 16 121

6

17

2

7 468 20 151

5

18 8m

6 293 32 31

4

19

8

4 325 15 18

6

20 30m 1 7 1035 18 41

4

21 1 1 795 21 44

2

22

2

5 545 18 39

6

23 0 2 1685 37 68 6

24 Q) 1 3 2710 42 45

7

25 .,.. fI) 25

3 4035 25 84?

8

26 5m Q) 12 11 3175 25 45

5

27 ..-4

> 6 3 1730 20 49 10

28 1 509 13 16

6

29 45m

....

=' 1 473 18 33

7

30 OJ

6 1 331 16 25 ?

31 ....

3 6 373 32 20 ? tU

OJ

..... Nov 1 en

3 1 380 16 17 ? VI

2 ...-4

4

2 305 20 121 ? OJ

3

>CIJ

5

6 320 IS, 18? 1

4 ..... 21 7? 207? 71 1 2 

.u

5 ......... ? ? ? ? ? 81

6 ? ? ? ? ? ? '" co

7 as bOOJ 1? 1? 4581 10? 8? 24?

8 .,... ....

3 464 15 22 19

9 .u QJ

4 401 17 81 ? tU

10 ::s 0.. .u ::s 1 3 280 13 30 13

11 29m (J::s eu

5

2 '360 18 19 1

12 ..... ..c:

4 5 293 13 18 ?

13

3 1005 11 17 17

14 2 406 14 15 ?

15 3m 7 547 21 17

3

16

4 570 15 14 12

17 25m

3

5 325 12 IS? ?

18

3

5 416 18 141 ?

19 ? ? ? ? ? ? 

20 ? ? ? ? ? ? 
Table 2.--Number of earthquakes and minutes of tremor recorded on seismographs aro

Kilauea Caldera (cont'd)

Tremor Number of Earthquakes (m

= minutes) Kilauea 'Summit ' II' . 21 SW Rift Upper- LowerInter Long and East East

Deep mediate Shallow 30 KM Period Shallow Kaoiki Rift Rift Oth

I

Nov 21 31 1671 10? 251 ?

22 1 159 7 13 ?

23 1 244 1 9 1

24 c:: 300

6 11 ? 0

25 GJ

4 328

6 13

3

26 4-J

1 255

7

9

27 en 1 251

9 18

7

28 8m QJ 181

6 22 7 :>

29 ....

2

2 105 11 14 9 4J

30 Q.. ='

2 1 149 17 22 31

Q)

Dec 1 6 495 12 26

2 2 Cd

2 330 15 32

4 4)

3 20m c::

7 300

7 23

4

4 en

4 225 36 12 11 f"-f

4m (1)

8 232 31 15

6 5 t 6 .... u 5 209 15 18

3

7 6m

2 230 13 12

4

8

4

3 217 17 18 3 9 as en

4 7 185 16 14

6

10 as

2 3 204 30 19

9

11 -rf

5 3 675 14 201

12

U Q)

Cd p.

4

3 1875 26 201

7

13 :1 Q.

+oJ ='

2 1350 20 15

7

14

u

:1 Q) 3 750 15

9

5

16 ...... .,c:

7 1 171 15 22 5

17 7m

4 219

9 19 1

18 1 347

6 46 3
+J

en

19 OJ Q)

d 222 2 14 1 20

en cu 1 540 3 7 6 21 rip.. cup.. 1 520 6 38 2 22 >Q) =' 3 28 2000+ 7 ? 2

23 Q) ..c 1 4 1410 8 28 3

24 0 +J 11 3 480 21 29 9

25 r-t d0 1 450 8 32 7

26 +J cu 3 390 6 33 9

27 +J 2 4 375 9 601 2 28 2 60 1500 10 lOS? 2

29 +J Q)

C'd > 2 50 1050 4 30 4 30 +J+J =' -,-4 2 33 455 17 19 4

31 78m (J +J 1 26 526 16 43 2

QJ f..4

1/ Upper east rift count poor due to continuous tremor and traffic.

l/ Count taken from station Puu Honuatila (PHO).
Table 3 is a chronological listing of successfully located earthquakes.

For each event the following data are present.~d:

Origin time in Hawaii Standard Time: date, hour (HR), minute (MN),

and second (SED).

Epicenter in degrees and minutes of north latitude (LAT N) and west

longitude (LONG W). Poor convergence of the epicenter solution is

indicated by"?".

Depth - depth of fucus i·n lan. Assumed depth is indicated by "x".

Mag - magnitude, if determined.

NO - number of station~ used in locating earthquakes.

GAP - Uttgest.azimuthal separation in degrees between stations.

DMIN - epicentral distance in Ian to the nearest station.

ERT - standard error of the origin time in seconds.

ERR - standard error of the epicenter in lan.

HRZ - standard error of the depth in km •..

MD - mean deviation of ,the time residuals. [ =

Ri is the observed seismic wav~ arrival time less the . th

computed time at the i station.

L R./NO] i 1

where

Q - solution quality of the hypocenter. This measure is intended

to indicate the general reliability of each solution:

.Q Epicenter Focal Depth

A Excellent Good

B Good Fair

C Fair Poor

D Poor Poor

Q is based both on the nature of the station distribution with respect to

the earthquake and the statistical measures of the solution. These two

factors are each rated independently according to the following scheme:

18
Station Distribution

NO GAP DMIN

A > 8 < 1200

2 Depth or 5 km

B > 6 < 1500 2 x depth or 10 k.m

> 6 "< 225 0

< 50 km C > 4 "< 1800

D Others

Statistical Measures

·ERH (km) ERZ (km) MD (sec) RMAX (sec)*

A < 1.0 < 2.0 < 0.10 0.25

B < 2.5 < 5.0 < 0.20 < 0.50

C. < 5.0 .~ 0.30 < 0.75

D Others

Q is taken as the average of the ratings from the two schemes; that is, an

A and a C yield a B, and two B's yield a B-. When the two ratings are only

one level apart the lower one is used; that is, an A and a B yield a B

(Hamilton and others, 1969).

The criteria for Q are the same-as used by the Office of Earthq~ake

Research and Crustal 'Studies, u.s. Geological Survey.

*RMAX is the maximum residual

19
OF SEISMIC EVENTS

197C HR MN SfC LAT N LONG W DEPTH MAG NO GAP DMIN ERT EPH 

OCT 1 0 12 8.5 155-15.0 28.0 2.2 19 133 0.6 0.12 0.1 

1 1 40 55.8 19- 29.5 1 55-16.1 24.1 1.8 17 69 8.0 0.11 0.7 

1 2 4q 53.5 lQ-20.7 155-1 1.4 7.1 0.8 10 102 1. 1 0.10 0.3 

1 5 43.22.3 19-24.5 11)5-17.9 0.1· 0.4 9 93 0.9 0.12 0.1 

1 5 56 29.1 19-1 q.4 155- 7.1 6.8 1.3 11 209 6.9 0.27 1.8 

1 8 57 21.3 19- 25.8 155-16.41 0.2* 1 289 2.0 0 I.e; 

1 11 4 14.C 19- 20.9 1 55-2 e. 7 q.4 2.1 13 130 q.6 0.12 O.q 

1 11 25 55.q 19- 27.2 155-?7.q 11.0 1.3 1l 141 C;. 4 0.06 0.4 

1 11 ·45 16.7 1C1- 21.3 155-2 5. 3 8.3 1.5 12 120 4.0 0.14 1.0 

1 12 4 51.4 lq-26.6 155-56.1 10.7 2.q 11 254 8.9 0.30 2.9 

1 11 25 58.6 1<;- 20.6 1 55-1 2. 8 1.5 1.5 12 183 3.6 0.1 O.q 

1 18 50 36.9 19- 21.0 155-17.4 22.0 2.1 11 112 1.7 0.26 1.4 

1 21 53 9.8 19-19.6 155-11.a 12.2 1.4 11 21q 5.5 0.30 1.6 

N

0 2 0 28 14.2 19-21.2 155-13.1 7.2 1.1 11 164 2.7 0.1 5 o.q 

2 1 24 33.1' lQ-21.0 155-13.1 q.1 14 169 2.9 0.1 1 0.8 

.J

2 5 13 11. 5 19-17.9 155-16. 9 25.5 1.9 13 203 3.0 1).3 0 2.1 

2 6 44 47.1 lq-ZO.9 155-12.8 q.5 1.4 13 114 2. q 0.09 0.'3 

2 14 4 6.0 1q-21. 6 155-28.91 11.4 14 135 10.2 0.10 0.9 

2 18 1 52.2 19-22.1 155-23.7 11.3 13 124 4.6 0.08 0.1 

2 18 6 43.6 19-22.2 155-23.8 10.2 12 112 3.9 0.09 o.q 

2 18 7 16.0 19-22.9 155-2 2. g 9.1 10 1 70 4.9 o. '3 q 0.8 

2 18 51 18.1 19-19.q 155-14.1 10.0 1.7 16 1 76 0.07 0.6 

2 19 17 24.2 19- 24.4 155-24.1 11.7 0.7 14 182 7.8 0.10 0.8 

3 2 27 45.3 1q- 30.8 155-15.<1 3.'2* 2.0 7 330 11. t 0.68 3.6 

3 6 31 44.0 19-19.6 155-15.4 10.2 1.1 13 111 3.5 0.08 0.6 

3 9 42 31.6 19-22.1 1 55-16. 7 20.8 1.6 12 q6 1. 5 0.1 q 1.0 

3 9 54 52.1 19-20.3 155-27.1 6.7 t.4 11 134 15.4 0.12 1.0 

3 11 1 3.3 19- 4.4 155-22. q? 8.7 2. 2 q 273 29. ? 0.64 3.3 

3 14 36 49.0 1-9-18.7 155-16.4 Zq.l 2.1 14 1 qO 3. 1 0.34 1.7 

3 14 55 lq.7 19-25.8 155-22. 9 10.1 1.4 11 1 70 5.C O.Oq 0.5 
SUMMARY OF SE 1.SM Ie EVEf\TS ( CO"'J T I NU EO)

191C HR HN SEC LA T N LONG W DEPTH MAG NO GAP OMI N EPT ERH E

OCT 3 15 23 10.3 19- 20.9 155-13.2 1.2 1.1 10 1 71 3.2 o.q e

3 18 37 33.2 1<1-20.7 155-13-.1 1.8 17 116 3.5 0.08 0.1 C

:3 21 56 48.0 19-11.0 155-31.11 8.q 11 246 11.8 0.46 3.1 1

3 23 41 12.1 19-12.7 1?1)-30.3 6.3 12 22'; 12. ! 0.40 2.6 2

4 0 18 46.0 155-13.3 1.3 1.1 11 110 3.3 0.14 f'.q 0

4 1 22.8 1 11.2 155-27.1 34.6 2.2 8 232 17.8 0.62 3.4 c

4 3 0 29.9 19-21.5 1 55-1 2.2 '7.0 1.6 13 165 2.0 0.20 1.2 1 

4 3 52 1.7 19-20.1 155-11.0 13.2 1.0 10 222 4.2 0.36 1.5 2

4 13 2 14.4 19-1Q.O 15.5-14.5 10.3 l.q 1e; 1 ql 5.3 0.09 0.1 0

4 13 3 20. 2 19-18.f; 155-13.q 14.8 1. 7 9 214 f.4 0.05 0.4 0

4 15 21 7.4 1Q-25.0 155-2 3.6-- 11.2 1.6 13 1 74 7.0 0.07 0.6 e

4 19 39 34.q 19-1q.8 1 55-5-0.9- 5.7 2. 3 12 790 25. q 0.56 3.4 1

4 20 50 26.0 19-18.5 155-16.3 q.O 1.4 12 1 <:)6 3. 1.0 C

N 4 21 16 5q.5 19-20.Q 155-2 7. '0' 8.2 1.6 11 143 13.9 0.10 o.q 1

H

4 23 24 41.5 19-20.7 155- 9:.'9 1.q 1. 5 11 24q 2.5 0.23 1.3 c

5 0 8 8.9 19-12.7 1"5-22.9 38.2 2.1 19 219 12.3 n.32 1.9 

5 4 18 58.6 19-19.6 155-1 3. 0 10.8 13 203 5. 5 0.1 4 0.9 0

5 12 25 12.2 19-2 4) .6 155-18.0 30.3 1.5 14 65 1.3 0.31 1.4 2

5 12 44 2.1. 3 19-21.5 155-11.8 q.6 1.1 11 168 2.2 C'.07 0.6 (

5 13 0 22.1 1q- 23. q 155-24.2 0.0* 1.0 A 200 1. 1 0.4 r; 1.1 

18 1 42.5 19-1 q. 6 1 55-2 6. «; Q'.8 1.3 9 157 6.5 0.18 1.9 1

5 20 1, 19-19.9 155-1 1. 2 1.4 10 112 0.5 0.06 0.3 C

5 20 40 20.8 19-19.3 155-13.q 10.0 1.6 13 198 5. 1 0.1 3 o.q c

6 1 28.

_21.q 1<1- 0.8 ·1 55- 2 r. 0 12.8 2.4 16 287 36.0 

6 3 54 18.4 19-20.0 8.5 1.3 13 182 4.0 0.1 8 1.0 C

6 5 q Q.3 l'1-26.C 155-29.1 ll.C 1.5 13 1 55 1 3.2 0.07 0.5 

6 7 34 22.3 19-24.0 15f5-23.4 11 .1 1.3 14 116 6.5 0.05 0.5 C

6 13 6 37.4 IG- Q.9 155-2 e. 61 18.6* 11 3·01 29.8 0.34 ?4 

6 15 21 25.7 lq-22.1 155-18. q 23.1 14 85 3.2 0.24 1.2 2

6 16 27 54.2 19- 21 .9 155-18.'5 24.4 1.9 15 19 3.8 0.21 1.1 2
SUMMARY OF SEISMIC EVENTS (CONT INUEO»

1970 HR MN SEC LAT N LONG W DEPTH MAG NO GAP DM.I N ERT ERH 

OCT 6 17 58 54.8 19-21.8 155-11. 1 14.2 10 1 75 1.4 0.04 0.5 

6 20 17 58.9 19-21.8 155-11.3 31.6 2.q 22 94 2.1 0.15 1.0 

6 21 35 15.3 19-22.3 155-1 5. 8 40.0 2.0 14 121 0.24 1.1 

6 22._ 51 33.9 19-21.9 1·55-18.7 24.6 12 83 3. 7 0.51 1.8 4

., o 38 44.3 19-21.1 155-19.0 24.6 11 84 3.9 0.47 1.1 4

1 ·8 46 6.q 18-51.4 155-12.7 16.1* 15 301 39. £. 0.37 2.8 

7 9 29 11.1 19-22.3 155-18.6 24.6 1.9 15 71 3.2 0.22 1.1 

1 10 7 35.0 19-4".7 155-33.8 8.1 2. 5 12 316 12.8 0.62 8.2 

7 18 43 36.6 19-21.7 1 9.1 9.1 2.3 16 118 10.5 0.09 0.8 

1 20 9 56.5 lq-23.6 155-18.2 19.0 1.5 10 68 2.5 0.45 1.3 4

1 20 17 46.4 19-29.S 155-50.9 14.9 2.4 12 1 1)4 8. 3 0.41 3.0 1 

1 21 28 12.2 19-22.1 155-25.61 11.4 1.7 15 1 22 6.1 0.01 

N 8 6 13 4.5 1<)- 21.3 155- 1.2 3.5 1.2 16 191 9.5 0.11 0.8 

N 8 10 48 32.1 19-21.9 155-1 8. 2 26.0 14 12 3.5 0.20 1.0 

8 13 58 9.q 19-21.1 21.3 13 87 3.8 0.26 1.4 

8 21 10 22.6 19-25.3 155-16. 1 0.1* C'.7 1(\ 223 1.7 () .12 0.5 

8 23 55 4.1 19-16.1 155- 6.1 1.8 1.1 8 321 11. 8 2.8 

9 1 23 43.1 lQ-16.0 155- 9.6 31.6 2.0 270 11. 3 0.20 1.3 

9 2 51 59.3 19-26.2 155-15.6 0 .• 0* 0.6 7 289 3.4 O.3Q 1.3 

q 5 11 55.0 19-18 .6 155-13.5 7.4 1.5 11 211 6.7 0.30 1.6 

q 11 46 36.4 1 <;- 21. q 1. q 13 10 3.6 0.54 2.0 4

9 21 25 19.9 19-13 7 15'5-28.1 25.9 1.9 9 213 14.6 o. C; 2 2.3 4

q 21 33 49.4 1<;-21.0 1 55-1 2. 6 <1.7 1 .1 15 115 2.8 0.12 O.R 

9 21 43 3.4 19-19.1 155-25.5 6.8 1. B 15 141 3.9 0.11 1.0 

q 22 12 55.1 19-21. 155-28.8 11.5 1.5 12 133 10.0 0.1 5 1.0 

9 22 53 13.4 19-21.8 155-26. 3 7.1 1. 3 11 122 5. q 0.12 1.0 

10 ·4 26 14.2 19-13.9 155-28.1 23.4 1.8 1 212 14.4 1.04 4.1 1

10 5 13 16.3 1q- 2<1. 3 1 55-54. 5 lC.9 2.1 11 206 3.7 0.36 5.2 

10 6 41 31.9 19-21.6 155-2q.l 9.0 2.1 16 llq 10.5 O.Oq 

10 1 49 33.0 19-20.1 155- 7.• 1 1.1 l.q 13 203 f.D 0.11 1.2 
SUMMARY OF SEISMIC EVENTS (CONTINUEO)

1970 HR MN SEC lAT N LONG W DEPTH NO GAP OMIN ER T ERH E

OCT 10 11 10, 51.4 19- 20.6 155-15.1 22.q 2.1 12 152 2.4 <'.22 1.1 1

10 12 48 58.6 19-11.7 155-22.5 40.0 2. 5 15 225 13.4 0.24 1.6 2

10 13 20 10.6 19-2'3.7 155-17.4 13.5 1.8 16 13 1.2 0.05 0.5 0

10 18 26 2.2 155-31.51 45.5 2.5 22 198 19.0 0.30 1.5 2

10 20 51 34.3 19-12.8 155-26.8 1.5 2.,0 12 222 0.31 l.q 1

In 21 Zq 25.5 19-14.3 155-27.5 5.5 z.n q 215 1 3.1 0.11 0.1 r

10 21 45 56.4 19-25.4 155-30.0 10.9 1.9 12 154 14. 3 0.,:)9 0.6 0

10 23 30 51.9 19-22.8 155-26.4 1.4 2.2 19 101 7.3 0.13 1.1 1

11 1 152 36.3 19-23.3 155-21. 7 11.2 1. 8 15 1 9.6 0.11 0.1 0

11 9 0 38.8 19-21.1 155-? 5.4 8.3 12 125 4.0 0.13 1.0 1

1'1 12 42 26.0 1<1-18.3 15.0 1.6 8 218 6. A 0.09 0.6 0

11 16 40 2.0 19- 25.1 15'5-2 q.4 10.Q 2.2 14 IS? 13. 2 0.1 3 0.8 C

11 20 5 53.5 19-22. <; 155-24. q 11.0 13 120 5.8 O.C' 7 0.6 C

N

w 11 23 12 lQ.9 1q- 23. 2 155-11.1? 4.7 1. 1 13 96 0.6 0.40 1.6 2

12 0 53 58.4 19-21.0 155-2 5.2 g.2 1.6 13 176 3. 7 0.11 0.8 0

12 1 55 27.8 19-18.3 155-16.4 q.3 1.6 12 196 3.8 0,.01 0.7 C

12 4 45 25.,4 1<1-25.4 155-28.2 8.9 2.4 18 81 11.8 0.) 9 0.1 0

12 6 44 8.6 19-20.7 155-12.9 6.1 1.4 10 1 78 ,4. 0.11 1. 1 (

12 7 18 45.9 19- 21. 6 155- 3.4 2.8 1.9 14 204 20.• 8 0.54, 1,.1 2

12 12 28 1.7 19-19.3 155-13.3 10.8 14 207, s.q Q.14 1.0 0

12 1,3 8 5q.2 19- 1'.'7 155-27.5 28.• 6 2.5 13 269 21.5 1 .32 C;.7 1 (

12 1'3 42 24. 1 19-21.4 155-11. 6 9.7 1. 8 14 1 15 3.5 0.06 0.6 0

12 17 51 11.0 19-56.5 1&;5-29.3 2.6 14 329 18.1 O.4Q 3.8 1

1'2 19 -47' 3'6.6 19-16. 7 155-1,C•..«;i? 30.4 2.2 16 2 55 1 0.2 0,.22 1.1 1

12 23 26 25.8 19- 33.3 0.0 2.6 11 154 11.7 0.61 l.e) 2

13 a 20 7.7 19- 21.. 6 5.2 10 153 2.4 0.28 1.1 2

13 ' 2 1 21.4 19-24.3 155-17. 1 7 ..Q 1.8 17 55 1. 1 0.04 0.4 0

13 2 6 4.8 1q- 24.q 155-17.6 11.5 1.4 10 123 0.4 0.11 0.5 e

13 2 9 26.5 19-24.1 155-1 5. 6 lO.A 9 142 2.4 0.11 1.2 c

13 2 9 42.2 19-2'3.A 6.7 1.2 12 6b 2.0 0.11 0.4 e
SUMMAR.Y OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LA T N LONG W DEPTH MAG NO GAP D"I N ERT ERH F

OCT 13 2 q 43.5 19-23.7 155-18.1 6.1 1.4 11 14 2. 1 0.16 0.'5 1

13 2 11 39.8 19-23.3 155-17.8 1.4 1.1 8 94 1. 8 0.1 2

13 4 37 19.3 19-11.5 155-19.2 43.1 2.2 14 226 12.0 0.49 2.6 3

13 8 40 1.0 19-28.q 155-14.1 26.9 3.2 20 66 8.2 0.11 0.1 1

13 10 1 30.6 19-73.6 155-1 8.4 19.7 1.1 11 58 2.2 0.21 0.8 2

13 12 30 37.2 19- 9.2 155-3 0.5 28.3 2.t: 6 277 O.OS 0.4 0

13 12 52 34.0 19-10.0 155-19.8 31.2 13 24q 14.q 0.32 2.3 2

12 53 13.9 1 55-1 c;. 1 45.0 12 237 11.4 0.78 2.6 6

13 12 54 11.8 19- 4.2 155-11.6 49.3 8 277 25.5 1.q1 8.1 12

13 15 7 55. 8 lq- 9.4 155-34.0 15.4* 2.6 15 256 27.4 0.28 2.3 

13 21 35 55.6 lq-lq.1 1155-15.6 1.7 14 113 3.2 0.15 0.9 C

13 22 5 27.6 19-21.0 155-1 3. q 8.4 14 161 2.8 0.14 1.0 0

14 1 32 1q- 26. q 1 '55-33.5 4·.2 3.5 17 18.6 0.12 0.8 1

N

.&:' 14 6 28 20.1 19-1R.4 155-15.4 9.q 11 205 4.8 0.1 3 0.9 0

14 11 29 25.5 19-1q.5 155- 4.6 7.4 2. 3 11 215 10.2 0.30 2.0 1

14 16 36 20.4 lQ-23.0 155-18.0 22.8 1.8 q 12 2.2 0.73 6

14 19 6 8.3 19-12. 7 155-31 • g? 9.3 q 221 to.O 0.2 5 ?l C

14 lq 18 38.1 1<1- 21. 4 155-1 3. 4 1.3 157 3.3 0.14 O.q 

14 20 56 19-24.1 155-32.7 12.0 11 1 70 18. 5 0.12 o.q 1

14 21 5 47·.2 19-14.1 155-25".9 26.2 11 206 11.0 0.51 2.5 5

14 22 11 11.4 19- 21.1 155-11.3 28.2 2.3 17 91 2. 8 0.24 2

1'5 5 35 19-15.0 155-28.5 5.6 11 198 13.3 0.19 1.3 1

It; 8 24 11.1 1<;- 14.6 155-33.0 10.3 12 lqq 1. 3 0.31 1

15 8 32 42.2 1q-1 q. 7 155-25.5 8.1 10 141 4.0 0.1 3 1.0 1

15 10 56 48.3 19- 23. 9 155-25.51 10.4 l.q 15 125 1.8 O.OR 0.7 1

15 11 1. 1 ';.<1 lQ-20.1 155-1 '3 13.6 1.4 8 23q 3. 2 0.38 1.3 2

15 11 23 15.4 1·Q-19.6 155- 1.2 5.1 2.0 11 206 10.7 0.19 1 • 3 1

15 11 27 21.1 19- 2t.O 155-24. q 12.2 1. 1 10 189 1.6 O.Oq 0.8 0

16 0 39 39.5 18-58.3 155-33.0 0.0* 2.5 14 276 43. CJ 0.37 2.7 

16 1 23 1. 1 lq- 1.2 1 55-2 5. 1 32.2 14 260 22.<"1 0.94 4.4 6
SUtAMARY OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

OCT 16 1 25 4.q 19- 29.8 1 &;5-32. 21 0.0 9 213 2 o. 2.13 CS.4 1

16- 1 25 17.7 1<;- &.1 155-25.2 29.0 9 255 22.6 1.04 5.0 11

16 1 26 37.4 If;- 8.3 155-25.6 31.q 2.2 q 21.6 l.q e 7.q 1 c

16 1 27 14.0 18- 52. 7 155-26.31 1.3* 2'.2 13 307 45.2 2. '32 10.1 

16 1 28 51.1 19-14. 2 155-28.6 '34.5 9 ? 14 1.4.4 3.1 4

16 1 31 9. 8 19-14.3 C. 5 42.0 10 1 1.6 0.66 4.1 5

16 1 43 11.9 lq-2G.7 155- 32.61 0.0 1. R 1 273 21.2 '3.07 4.8 1 '

16 2 lq 25.1 19- 25.4 155-22.8 g.6 i.4 12 117 0.04 0.4 C

16 2 24 5.4 lq-23.1 155-24.9 10.6 1.2 14 120 6.0 0.01 0.1 0

16 4 0 2_0.9 19-21.9 1 55-2'5.-0 8.6 2. 7 18 106 4.2 0.08 0.8 0

16 5 2A 33.6 lC;- 9.4 155-26.1 24.5 q ? 59 20.6 0.3Q 2.0 3

16 5 32 54. Q 19-13.7 155-29.q 3'3.4 15 2 l:? 12. 8 0.4 q 3.2 4

N 16 5 44 6.5 19-15.4 lSc;-2Q.6? 37.7 10 1qO 1 3. 2 0.80 5.8 

VI 16 5 51 25.3 19- 2 1 55-2 6. 1 58.6 1.6 13 267 29.9 1.i)C 5.1 

.' 16 1 16 30.0 19-20.3 155-19.l: l'...c=:' 10 1 11 q O.Oq C

16 1 30 46.9 19- 45.6 156- 2.<; 6.3 ?5 18 2 58 2 <1. 8 0.20 1.6 1

16 11 54 1<1.9 1q-14. 3 155-30.6? 43.q 2.2 16 ? 04 1 1. '5 0.37 2.5 

16 12 2 22.3 1Q-10.2 155-29.1 41.q 2.5 14 245 16.4 0.35 2.1 2

16 14 21 43.4 lC1-21.4 155-14. 8 10.1 1. 'l 8 145 1. 2 0.1 8 0.4 

16 16 36 32.4 19- 20.5 1'55-14.2 8.6 1.4 16 168 3.0 0.13 0.9 C

16 19 21 12.1 lQ-20.4 155-14. 3 8.4 1. o. 17 1 71 3. 1 0.11 C

1 6 23 1 1 3<).L.. 19- 21. 3 155-12.q 14.7 1.1 q 163 o.() 7 0.4 0

11 2 46 51.7 19- 20.6 155- e.7 1.2 12 195 3.5 0.2 ? 1.6 

17 4 1 12.3 19- 25.0 155-21.1 10.6 1.3 13 140 11. 8 0.11 0.8 0

11 5 42 29.7 19- 7.6 155-25.2 1.9 8 272 22.4 0.31 '3.0 3

17 5 49 ().4 19-17. 2 1'55-28.7? 34.q .2.4 10 16.9 10.9 o. ?4 1.4 

17 5 55 9.2 19- 0.6 1 55-2 3. 3 13.6 ? •. 4 . 9 272 35.8 0.41 l... 4 1 

17 5 55 46.3 19- 2.4 155-27.51 6.2 1. 6 9 280 37.9 0.56 3.0 5

17 6 1 27.7 lq- 4.3 15'5-24.3 1'1.1* 2.1 213 Zq. 0.52 '3.7 

17 6 4 14.4 19- 0.3 1 55-7 2 • 3 2.1 10 2<19 36.8 0.47 3.4 
OF SFISMIC EVEt\J1S rCO",llINUEO)

191C HR MN SE:C LAT N LONG W DEPTH MAG NO GAP N ER. T J:RH 

OCT 11 6 13 25.7 1q- 20.4 155-12.0 11.1 1.6 1 262 4.0 0.21 0. 0 

17 6 30 19.6 19-10.1 155-26.0 30.1 1.1 13 239 18. 1 0.14 3.0 

17 8 36 24.7 1<1- <1.6 15.2* 1.9 10 246 19.9 0.35 2.7 

11 8 48 43.3 1Q-1O.1 15'5-24.6 34.5 2.2 11 250 16.9 0.38 3.0 

17 q 37 42.5 19-1 q. 5 155-11.6 11.6 1.5 10 224 7 0.36 1. q 

11 15 25 46.7 lq-21.6 1 55-1 '5. 4 <;.6 3.1 20 1 35 0.4 0.05 C.5 

17 2"2 6 14.4 1q-19.6 1 1:)5-1 5. 7 1.9 o.q 12 114 3. 1 0.21 1.2 

1 34 33.0 19-23.5 155-16.5 2.5 0.4 7 166 0.6 0.62 1.6 

18 3 46 15.7 1 42.('- 155-1 1.6 33.3 7. 5 20 133 18. q 0.1 5 0.6 

18 4 5 43.7 19-16.7 1 56-19. f= 9.5 2.1 11 305 c; O. 2 8 s.q 

18 4 23 3C.c; _1<;- 21. C 1 55-1 1. 6 G.4 2. 2 IB 1 q 1 3.2 0.1 0 

18 4 32 31.4 19- 22.1 1.1 1.6 13 145 0.9 0.12 D.9 

N 18 6 3 54.9 19- 25.6 155-28.2 10.9 1.5 11 223 11.6 (1.18 1.1 

0\ 18 7 21 33.1 lq-24.8 155-23.1 12.1 1. 2 10 188 1.3 0.10 1.2 

18 8 3 15.4 1 q-18. 155- 4.6 3.8 2.0 12 218 11.4 0.30 1.7 

18 le 53 45.0 19-21.0 15 r;-l 4. 5 A.4 15 156 2. 1 0.1 3 o.q 

18 12 18 '59.3 19- 23.6 155-72.6 IJ.6 14 1 '59 5.2 O.Oq 0.6 

Ie 12 24 42.1 1Q- 2 2 1 55-1 6. 1 ? 8.1 -2.2 1 R 56 ('.5 C.2 (' 1.3 

18 14 1 20.7 19-1 g. 3 155-13. 7 10.1 2.8 20 1 qo 5. 0.07 0.6 

18 15 26 18.9 19-17.0 155-14.2 6.9 14 224 1.9 0.22 1.2 

18 15 44 11.4 1q- 18.9 1 55-1 3. 7 <;.8 7.4 21 1 q4 6.0 0.10 

IP 16 0 2A.8 19- 1 c;. 155-13.1 10.6 1.A 15 197 4.1 o.n o -:'1.6 

le 17 25 38.3 19-19.8 155-1 3. g 10.2 13 1 4.4 0.01 0.6 

18 1 1 57 2'1.<) 1q- 24.3 155-17.1 18.6 1.8 12 128 1.0 0.18 0.8 

18 20 I? 32.4 19-41.2 156- 3.8 2.4 10 305 64.6 1.23 7.5 

18 21 .:) 16.7 19-17.6 1 6.2 7.3 12 225 10.5 0.44 2.6 

18 '12 13 17 • .3 1<;-20.2 1 55-16. g 2.3 16 143 C.q -3 c; 1.8 

0 38 4. It- 19- S.8 1 55-4 3. 3 8.0* 11 338 1/.,.3 ().10 C:;.A 

1'1 1.6 44 2.ti 19-18. 155-15.6 34.1 2.6 14 195 4.0 o. 1 .5 

1q 20 1 5 10.9 19- 18. 1 155-1'5.6 32.1 2.0 15 198 4.q t).? 4 1.4 
OF SEISMIC EVENTS (CONTINUED)

1970 HR MN SEC LA T N LONG W OEPTH MAG NO GAP N ERT ERH E

eCT 19 21 56 19-19.6 155-13.8 10.:2 1.4 1f. 18l' 0.08 0.6 C

19 23 3q 4.0 1<1- 22.2 155-2 5.0 1.6 2 •.1 16 91 4.7 O.OQ 0.8 c

20 0 42 7.6 19-22.2 155-23.3 10.0 2.0 11 110 3.6 0.1 0 1.0 o

20 1 36 29.4 19- 20.9 155- q.4 8.6 2.1 14 241 1. <1 0.1'7 1.2 C

20 4 4-1 2q.4 19-26.0 155- 2 5. c; 13.0 2. 1 14 199 8.4 o.nq 0.1 0

20 4 '5g 51.0 1q- 22.1 1'55-16.1 26.2 1.5 14 q9 0.7 1.4 2

2(' 9 21 4.0 18-51.2 155-16.81 5.2 2. t: 16 2 qa 42.3 0.23 1.5 c

20 10 '; 28.9 19- 21.0 15'5-13.1 q.q 1.9 15 16q 3.0 0.12 0.8 C

20 10 52 30.8 19-23.4 155-24. A 11.2 2. n 15 120 6.5 o.n1 n.6 C

20 11 48 57.3 19-24.5 155-2.3.81 10.8 2.0 14 119 1.4 0.06 D.C; C

20 14 41 45.7 lq-18.9 1 55-1 3. 6 q.q 10 211 6.1 0.26 1.4 c

20 23 39 33.0 19-24.6 155-16.9 8.6 1.2 12 167 o.c: 0.21 O.R o

20 23 41 29.1 19-26.0 15'5-11.0 12.5 1.5 7 291 1.5 0.6<1 2.2 4

N

........ 21 14 8 2(;.8 19- 1<1.6 1 '55-1 3.4 11.2 2. 1 13 19q I). 3 0.16 1 .1 0

21 15 9 56.6 19-19.5 1 3. t- 11.0 2.5 17 1 es 5.2 0.06 0.6 C

21 17 32 45.c; 1<1-20.8 155-12. <11 11.7 12 177 4. 7 0.24 1 .2 1

21 18 32 49.8 19-18.9 155-13.8 10.5 2.2 16 195 6.0 0.10 0.8 C

21 21 3 19. 8 19-1<7.7 155-15.1 1.9 2.3 15 110 3.0 0.14 o.q 0

21 21 1 50.5 19-53.7 1 '55-4 B. 1 4.2 ? 5 20 2 30 18.5 0.24 2.2 2

21 22 36 IS·it 1q-18.6 155-14.q 14.9 11 2 or; 5. 2 0.06 0.4 C

21 23 5 1.4 lQ-1O.9 9.1 2.7 15 2 51! 8.0 0.44 2.7 o

21 23 22 52.0 19- 9.1 1')'5-37.47 6.5 13 2qa 9.7 0.42 2.1 1

22 1 22 14.8 154-59.3 32.5 11 240 20.4 (\.30 1.6 2

22 3 44 31.1 18-56.4 155-26.31 5.6 15 310 3 <;. 0 0.32 1.2 

22 1 42 lQ-20.2 155-1 0.4 11.8 11 237 3.7 0.32 1.6 2

22 9 30 20.7. 1 c;- 20. 1 C35-2 6 •.4 43.8 2.5 If 12r 5.6 0.33 1.7 3

22 17 46 13. 2 1q- 33. 2 155-4 o. q 4.8 2.1 15 96 25. 5 0.07 O.r:.> C

22 18 22 36.8 1<;-20.3 1 55-1 2. 5 9.3 1. P 11 1 93 4.1 0.20 1 .1 c

23 0 6 48. 19- 21.0 1155-12.6 q.o 1.7 1'5 114 2.7 0.10 0.1 C23 a 28 12.5 19- 21.0 155-12. q q.Q 1.7 15 1 71 2.9 0.12 o.p C
OF,SEISMIC EVENTS (CONTINUEDJ

1910 HR MN SEC LAT N LONG W OEPTH MAG NO GAP DMIN ERT E-RH 

OCT 23 16 33 15.8 lq-19.2 155-24. q 8.1 2.q IS 161 3. 3 0.11 0.9 

23 21 51 ·3. 1 19-23.6 155-23.• 5 10.3 1.6 14 1 74 6.4 0.11 0.1 

23 23 15 19-27.0 155-14. 11 3.2* 2.\.,r • 8 276 6.3 0.90 3.1 

23 23 40 24.1 155-16.21 4.9 1.9 8 232 2.5 0.18 4.3 

23 23 5"3 12.1 19-19.1 155-13.6 10.2 12 193 5.8 0.12 

24 0 49 24.2, 19-23.1 15'5-15.1 31.6 2.3 13 181 1. 3 0.58 2.t; 

24 8 36 8.5 19- 23.1 155-16.4 3.3 1.1 10 115 0.9 0.26 O.Q 24 11 45 '30.9 19-23.5 155-25.1 3 12 142 6.8 0.07 0.7 

24 12 17 43.4 If1-21.2 155-12.5 1.q 1.6 15 111 2.5 0.13 0.9 

24 16 27 o.q lC)-20.9 155-29.2 10.1 2.0 11 133 10.5 0.12 1.2 

24 19 33 11.2 '19-18.6 155-27.1 6.9 2.2 .16 155 14.9 0.11 o.q 

25 0 56 0.5 19-25.1 155-26.1 1.R 2. 3 18 113 9.0 O.Oq 0.1 

25 6 42 19-30.5 1 C;C:·-l '5.8 3.4* 1.9 1 32q 10.0 ').5 q 3.0 

N

ex> 25 8 32 52.8 19-18.1 155-14.5 35.5 4.1 23 1981q3.4 0.11 1.1 

25 9 12 13.3 19--1<1.0 155-14.4 34.5 16 191 5.4 0.11 1.0 

,25 9 31 t;1.8 lq-3f.l 1 55-14.4 ll.q 1.7 16 100 1 c;. 2 0.')1) f).4 

25 9 55 28.0 21- 0.6 156-4q.l 7.5 4. 8 1 184 64.Q 0.88 4.7 

25 10 16 31.5 1q- 20. 7 155- 7.6 ,>.q 1.2 16 194 13.6 0.09 0.1 

25 10 53 26.1 1q- 2<1. 3 8.0* 1.0 9 331 14.3 2.A 2 11.4 

?5 13 21 53.5 19- 21. 2 .155-46.0 11.3 2.3 10 267 1 q. 5 0.29 s.q 

25 13 41 8.1 19-20.5 1 55-12. 9 ,2.3 lq 1 78 3.7 C.13 0.9 

25 14 22 0.1 1q-21.6 155-13.0 2q.8 15 156 4. 1 0.1 1.3 

25 15 42 9.1 19-1A.5 1';5-14.1 33.2 2.4 lq lq7 5.6 0.19 1 • 1 

2S 16 24 18.8 1q- 25.0 1 55-1 6.5 e.q 1.0 9 167 o. q 0.04 0.3 

25 17 11 47.9 19-21.8 155-12.21 3.2* 1.6 7 298 1 o. c; 0.95 3.q 

25 11 43 2.5 155-15.4 4.2 J.3 7 246 0.1 3 o.r; 

25 18 4 '35.2 19- 22.9 155-14.5 '5.8 0.8 13 1 4<1 2.4 0.14 0.5 

25 18 35 38.4 19-11.'1 1 55- 16. 3 33.3 1.6 15 19B 4. 1 0.20 1.3 

25 19 14 4 19- 27.1- 155-13.41 8.0* 2.1 11 2 7.4 0.54 3.9 

25 lq lq 42.9 19-24.6 1 55-1 7.4 C.O 0.7 10 94 0.3 0.08 0.4 
OF SEISMIC EVENTS CCONT I N1JED t

197C HR MN SEC LAY N LONG W DEPTH MAG NO GAP OMI N ERT ERH F

OCT 25 19 34 31.A 1q-24.4 0.0 0.4 8 0.5 0.14 0.6 1 C

26 0 39 51.6 o 19-2q.4 155-15. 3 0.3* 1.9 8 324 8.4 0.43 1.6 

26 1 '5 52.1 19-25.0 155-17.4 2.3 O. 8 8 129 0.6 0.03 0.2 0

26 3 2 18.2 19-47.0 4.3 1.6 18 110 19.4 0.16 O.q C

26 7 6 5.2 19-20.5 154-45.7 40.0* 1.7 18 304 19.5 O.lq 1.q 

26 1 26 47.4 19- 24.5 1'55-17.0 1 1 10 101 0.7 0.08 0.6 C

26 7 37 4.6 1'1-21.1 1 55-14. 1 A.O* 6 315 6.b 1.04 5.1 

26 11 29 56.9 19- 31.5 155-14. 5 2.6* 1.3 7 332 12. 5 0.51 3.1 

26 14 1q 54.8 19- 31. 3 155-14.21 8.0* 1.2 6 12. 3 1.93 13.1 

26 15 38 21.6 19-27.1 155-16. 3 3.q ·0. 5 6 312 3.9 2.5 4

26 18 42 12.1 19- 22.0 155-13.1 2.8 0.6 6 151 1.4 0.03 0.4 C

26 20 44 43.3 19- 25.r 155-16. 31 1.5 0.4 10 218 1. 3 0.2 5 1.1 1

21 24 54.8 19-24.4 1'5S-17.A 0.5 1 • 2 10 110 0.6 0.19 0.1 

N

\0 26 21 27 8.1 19- 26.1 1 55-1 6. 8 4 .• (1 1.2 q 293 7.0 0.71 1

26 21 21 34.2 19-31.2 1 55-1 3.6 3.2* 1. 1 6 332 13. 1 0.68 .3.8 

26 21 8.8 19- 2 f;. 5 1 55-1 4. 5 2.5 0.9 1 325 5.2 0.40 1.6 1

26 21 36 26.1 19- 26.2 155-14.11 0.4* 0.5 8 305 4.6 0.35 1.1 

21 40 .14.3 19-25.7 155-13.71 A.O$ 1. 1 1 321 6.0 0.47 5.q 

26 21 41 47.9 lq-24.3 1 55-1 5. b 1. 0 1 0.3 6 2.6 0.20 C.8 1

26 23 36 28.3 19- 27.8 155-14.01 0.2 0.6 8 317 7.5 0.81 4.0 c

27 n 8 2q.6 19- 24.9 1 55-1 6. 1 1.9 7 256 1.6 0.26 1 .1 1

77 1 29 40.4 19- 24.2 155-17. 2 2.7 1.6 13 C12 1. 1 0.08 0.5 C

27 2 55 45.9 19- 21. 5 155-14.51 1 .6 0.8 8 313 6.5 O.5Q 2.3 1

27 3 21 14.1 1q- 19. 1 155-1 1. 1 32.3 1. 5 14 168 7.0 0.21 1.3 2

27 5 3 23t • A lq-17.1 155-17.3 1.1 13 200 2.7 0.24 1.4 2

27 5 54 45.8 1c;- 1q. 1 155-1 3. R 12.9 1. 1 10 204 5.6 0.1 1.5 

27 6 26 58.0 19- 2 3.2 155-23.8 IJ.2 2.t 15 67 5.6 0.06 0.1 C

27 6 29 35.6 19- 23.3 155-24.1 lO.B 1. 4 l2 1 31 6.0 C .07 ".6 1

27 6 30 20.1 19- 24.6 1 55-1 7. 2 0.0 0.4 q 123 O. f. 0.1 0 /

27 6 32 42.8 19- 23.0 155-24.9 7.q 7.4 17 84 5.9 0.08 0.8 0
OF SEISMIC EVENTS (CON T INUEO»

1910 HR MN SEC LAT N LONG W f1EPTH NO GAP OMtN ERT ERH 

OCT 21 6 36 42.3 19-23.2 155-23.1 10.1 2. 2 15 66 5.6 0.01 (l.8 

27 1 29 54.6 19- 23.1 155-24.1 10.9 2.0 15 1 15 5.4 0.06 

21 1 34 10.3 19-23.1 155-24.2 lC.8 1.3 14 1 31 5.6 0.0'1 1').6 

21 8 21 31. 1 lq-25.9 1,}5-24.6 -10.6 12 211 1. 0.08 0.4 

27 9 21 25. q 19-23.9 155-16.0 2.4 0.6 R 205 1.b 0.28 0.7 

27 10 11 44.2 1q- 29.4 155-14.6 0.5* 1.9 7 330 8.9 O.5Q 2.4 

27 10 12 3'3.5 19-25.3 155-21.9 10.0 1.5 11 150 4.1 0.32 0.6 

27 10 16 8.2 19-22.7 1 55- 2 5.1 1.. 8 15 1 5.6 0.13 O.q 

27 12 31 49.2 19-ZQ.a 1 b? 8.0* 2.2' 7 331 9.7 O.3f 1.0 

21 13 23 31. 6 19-23.4 155-·17.4 1.1 0.8 11 73 1.0 0.11 0.5 

27 13 41 53.2 19-25.8 15'5-24.' 10.4 1.8 13 1 83 7. 3 0.06 0.4 

27 14 57 43.3 19-26.A 155-13.1 1.0* 1.9 6 334 7.6 0.72 4.0 

w 21 17 58.8 1q-17. 0 155- 5 C. 4 7.1 2. B 15 296 23.6 0.40 2.9 

0 27 18 8 9.4 19- 1.1 155-14.3 8.0* 12 2ql 35.5 0.83 5.2 

28 6 43 58.2 19-32.1 155-45.71 2.2 2., 15 lQ2 16. 8 0.21 1.0 

ze 7 19 50.3 1q- 2 1 • '5 155-11.6 q.R 12 1 72 2. 5 0.08 

28 19 48 20.6 19- 21.0 155- 6.51 4.2 2.1 16 198 15. 5 0.12 O.A 

2q 0 1 11.5 ·19-16.5 155-15 1 • 7 8.2 2.1 11 J 27 25. 7 0.40 4.7 

29 2 56 19.1 19-18.9 155-16.0 9.0 1.6 15 185 3.3 0 0.8 

?c; 7 12 4!'.5 19- 21.2 155-1 3. q s].5 1. 5 16 1 56 2.1 0.11 . 0.8 

29 1 47 30.6 19- 31 .1 156-26.2 10.1 3.q 24 259 54. 1 r..27 3.3 

2C1 12 24 31.8 19- 22.4 155- 2 4. 8 11.4 2. 1 14 1 11 4.9 0.08 0.7 

29 20 14 54.4 lq-lq.5 1'5';-15.4 q.4 1 t) 180 3.7 0.1 1 0.8 

2«; 23 '53 34. (' 19-21.1 1 55-1 3. 5 9.4 2.0 18 163 3. 1 0.08 0.1 

30 0 4 23.5 19-19.2 155-15. e 9.4 1.6 1.6 1 78 3. 2 0.09 0.1 

30 1 44 5.0 19- 3.2 155-19. 4 35.2 2.7 21 260 31.4 0.36 2. 1 

30 2 4 50.2 1'J- 26.9 1 54-56. 21 10 184 5. 3 0.80 2.4 

30 12 41 51.4 19- 23.3 1 55- 5 .6 10.7 1.4 11 211 6.q 0.09 0.6 

-30 14 25 24.2 1g- 24, 5 155- 4.31 7.6 1. 8 9 114 10.5 ('.20 2.q 

30 18 50 57.4 19-1 e. 7 155- 0.0* 3.2 l.A 225 1 7.0 0.30 1.8 
SUMMARY OF SEISMIC EVENTS {CONTINUED)

1Q10 HR MN SEC LAT N LONG W OEPTH MAG NO GAP OMI N ERT ERH E

nCT 30 19 53 49.8 1q-18. 3 155-14. 3 31.5 1.6 15 1 qq 6.3 (\.2 2 1.3 1

31 1 0 15.6 1q-21. 3 10.5 1.4 10 181 2. 1 O.Oq 0.9 0

31 3 4 21.2 19-19.8 155-14.2 9.9 2.2 16 185 4.1 0.10 O.A C

31 4 20 38.0 19-19.5 155-13• ., 10.0 1.6 15 1 q1 5.1 0.1. 0 . 0.1 0

31 6 21 2.3 19-19.4 155-15.7 13.2 1.4 q 11q 3.2 0.05 0.2 0

31 22 lA b.2 19-22.6 155-76. 1 8.8 2.2 16 123 6.6 0.10 0.8 0

NOV 1 0 5q 33.3 1q- 2 2 • c; lc;5-23.Q 8.9 2.1 15 123 4.4 0.04 0.'3 e

1 3 15 39.9 19- 22. 1 155-28.3 q.4 1.5 11 135 9.q 0.1.3 1.3 1

1 5 26 32.3 - lq- 24.1 155-25.21 11.0 1. 5 15 124 A.O 0.07 C

1 10 16 52.6 19-20.6 155-l0.8? 11.1 1.3 11 217 3. 3 0.16 1.1 C1 11 16 28.3 lq-22.6 155-13.1 6.1 0.8 9 1 71 1. 1 0.16 1.5 0

1 11 41 7.5 19-27.1 155-26.1 13.4 1.1 12 262 7.0 0.13 1.3 0

1 18 11 53.8 lC1-21.3 155-1f.O 8.q 0.Q 10 135 1.6 n.26 0.1 1

w

..... 2 3 55 41.4 01 27.9 2.7 1'5 110 15.0 0."32 1 .5 

2 6 1A 40.8 19-18.3 155-14.11 11.0 1.4 9 210 6.5 0.2 5 2.2 2

2 7 40 26.1 19-25.4 155-25.2 10.3 1.5 11 127 e. 8 C

2 12 44 23.3 19- 20. 8 7.3 11 127 2.8 0.12 O.Q 1

2 14 2 24.6 19-25.5 155- 25.4 10.0 2.0 12 128 8.8 0.06 0.5 0

2 16 26 58.3 lQ-20.Q 9.4 11 128 6.1 0.12 o.q 1

3 0 51 10.6 lQ-12.9 155--26.6 1.2 1.q 13 221 14.7 0.24 1.5 1

3 2 51 0.8 1q- 21 .3 1.5 2.6 16 207 21. 1 0.47 4.2 1

3 4 50 4.8 19-23.6 1 55-16. 2 37.0 1.7 13 12q 1.2 0.31 1.5 3

3 7 51 45.1 19- 23.9 155-26.6 6.1 2.8 15 100 12. 1 0.01 C

10 6 '54.8 19- 31. 1 1 56-1 O. 7 8.0* 2.2 12 284 26.q 0.82 5.3 

3 12 10 3.4 1<;-21.9 155-24.9 8.8 1.7 15 102 4.2 0.09 0.8 0

3 20 50 59.2 19- 20.8 155-14.1 32.7 2.3 15 159 2.1 0.20 1 .? 1

:3 21 53 44.l 19- 20.9 1 55-1 3. R 8.2 f).9 13· 164 3. 1 0.13 o.q ('

4 1 58 52.0 19-20.Q 7.0 1.3 11 1 74 2.9 0.16 1.0 c

4 12 19 5.0 19- 23.6 155-17.1 14.9 2.1 16 11 0.1 o.os 0.5 

4 15 22 45.1 19-20.6 155-21.7 '1.2 11 1 '31 7.1 0.1 5 I.e; 1
SUMMARY· Of SEISMIC EvENTS (CONTINUEot

1970 HR MN SEC N LONG W DEPTH MAG NO GAP OMI N f·RT ERH 

NOV r: 2 40 9.0 1q-12.8 155-16.4 44.2 2.4 12 24'2 10. 3 0.37 3.1 

5 2 43 31.4 19- 0.1 155-14.21 8.0* 2.4 12 2q3 33.9 1.10 8.1 

5 2 44 17.9 19-12.1 155-16.5 39.4 2." 13 245 11. 1) 0.41 3.7 

5 6 36 46.4 19-32.5 1 55-59.6 9.4 2.9 8 296 1.9 1.25 1.1 

5 23 55 11.9 lC;-Z2.6 155-25.4 8.9 2. 3 15 95 5.q 0.07 0.7 

6 1 49 32.6 20- 2 3.1 1 55-4 7. 8 8.0 * 2.8 16 183 40.4 0.13 2.1 

6 1 5q 18.1 1<r-24.8 155-32.0 10.0 2. 1 12 165 11.4 0.16 1 .1 

6 8 4 32.5 19-21.15 155-17.2 22.7 2.2 14 102 2.1 0.1 q 1.0 . 

1 21 30 36.5 19- 20.1 155-i9.6 30.2 2.2 12 98 3.Q 0.19 1.2 

1 22 11 51.5 19- 26.1 155-26.81 1.9 2. 3 13 131 12. O.Oq 0.6 

7 22 41 0.9 1<;- 0.1 156-14.4 18.A* 3.0 18 315 66.5 0.31 2.2 

3 5 3 15.8 lq-ll.6 155-22.2 6.5 1. 7 12 116 5·.3 0.16-1.1 

A 8 52 58.1 19-22.5 155-11.8 24.6 ;;64 2.5 0.1 O.q 

w

N 8 10 51 28.5 19-1q.7 1 55-16.'" 28.4 10 158 1.5 0.31 1.1 

8 12 6 30.8 19-19.3 1 55-1 B. 5 1.8 11 132 2.4 0.10 0.8 

q 3 32 5('t.2 1G-l q. 1 1 55-1 2. 1 R.5 1.6 14 1 gO 5.2 0 .• 16 

9 10 52 49.2 1q- 2 155-23.6 10.5 1.4 11 116- s. t- 0.11 o.q 

q 20 11 20.1 19-18.6 155-2 1. 3 6.4 1 • 1 10 ;?O4 4.6 0.10 0.6 

q 23 53 18.5 lq-21.8 155-26. q? 11.6 1. 1 13 124 6.q 0.17 1.1 

10 0 31 46.3 19-43.4 15.4* 2.4 14 167 25.9 0.06 0.5 

10 0 46 47.0 19-12. 5 155-2 0.91 31.3 1. 8 14 221 14. 8 0.18 1.2 

10 2 53 14.0 1'55-15.3 8.1 1.4 10 184 4.0 0.22 1.3 

10 1 24 C.B lCJ-lG.1 155-21.2 30.7 2.5 16 126 3. 8 1..2 

10 12 14 1.q 19-18.9 15.1 8.2 1.2 10 191 4.6 0.24 1.4 

10 12 54 43.6 1 24.8 155-21.8 1.0.4 1.1 14 139 11.6 0.1 1 0.8 

10 14 10 21.1 19-18.0 1 55-16. 1.? 11.3 1.4 10 213 4.4 0.33 1.8 

10 15 28 2.0 1q- 22.1 155- 7.6 13.7 1.9 10 286 3.8 0.24 1.8 

lC 16 0 1.6 1 q- 20.5 155-1 r. g 10.3 1. 5 10 3.4 0.11 0.7 

10 17 16 12.0 lq-18.4 lS5-14.r; 10.1 1S 1 qq 6. 0 0.09 0.7 

10 17 19 52.0 1 q-18. 4 1 '55-14.3 14.q 1.3 6 21'5 6.'3 0.7 
SUMMARY OF EVENTS I NUEO)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMI N ERT ERH ER

NOV 10 21 37 17.6 lq-18.4 155-14.6 10.1 1.2 11 210 5. 8 1.0 0.

10 22 3 24.4 19-18.1 155-14.1 10.2 2.1 15 222 5.9 0.12 0.9 C

10 22 38 15.1 19-53.2 155-21.2 6.6 2.1 15 lqO 16. 1 0.26 1.4 1

10 23 33 54.8 19-1q.5 1.S 10.3 1.6 13 201 6.3 0.25 l.q 0

11 1 40 0.1 19-18.6 155-1-5. 5 10.0 1. 7 13 193 4.2 0.09 0.8 0

11 9 37 4.7 19-20.8 8.0 14 1 75 3.2 0.16 1.1 0

11 12 53 57.0 19-19.0 1 55-1 5.4 <1.8 11 191 4.0 0.10 0.7 011 15 53 45.4 1'1-11 .4 155-19.q 45.2 15 240 12. 2 0.30 2.6 2

11 11 12 41.4 19-12.2 155-20.5 37.3 3.7 18 223197.5 0.21 1.3 1

11 18 15 12.1 1C1- 35.8 155-16. 71 11.q 2.4 16 q9 16.0 0.1 4 0.9 

11 19 18 54.3 19-13. 5 155-23.1 27.8 2.2 15 ?34 12. 3 0.1. 4 0.9 1

11 22 4 51.4 It;-20.7 155-1 c. q 7.0 10 214 3.2 0.24 1.5 O

11 23 21 20.3 19-24.4 155-16.3 8.7 1.2 q 162 1. 5 0.14 O.c; C

ww 11 23 21 34.5 1g- 24.4 155-16.8 9.3 2.0 11 50 1.1 O.C3 0.3 o

12 0 56 51.3 19-14.1 155-2 r;. 3 26.q 2. 2 17 208 10.7 0.3 l.<;l 3

12 8 lq 32.3 19-1l:.8 155-19. 8 23.6 2.2 6 275 8.7 0.31 2.6 3

12 19 46 13.8 2{,,- 5.4 155-5 O. 4 20.3 4. 3 23 144 16.0 0.08 1.0 3

12 19 57 lq.l 20- 6.5 155-51.4 20.1 3. 1 24 146 18.4 0.10 1.0 4

12 20 17 6.8 20- 4.7 155-51.4 11.5 ?5 t5 303 17.2 0.23 1.6 4

12 21 36 0.3 20- 6.8 155-5 O. 1 15.2* 3.7 20 1 50 16.1 0.08 1.0 

12 21 46 19.5 19- 22.8 155-22.0 10.6 1.6 107 4.4 0.06 0.6 C

13 1 4 11. c; 1 <1-18.4 155-14.31 11.7 1.3 10 213 6.2 0.31 1.6 2

13 1 35 31.9 19-18.1 155-12.9 15.q 1.4 8 ?31 8. (l 0.20 1.2 1

13 2 34 42.0 19-19.4 155-15.7 8.1 1.2 12 179 3. 3 0.17 1.0 0

13 3 45 50.3 19- 21. 4 155-1 c. a 7.1 1.5 A 243 1.5 0.2 8 1.9 C

13 4 57 56.9 19- 20.6 155-· 8.9 13.q 1.4 8 2 A2 3.2 0.7 5 2.1 1

13 7 44 q.q 19- 1q. 1 155-14. 5 13.8 1.4 7 1 q8 5.1 0.14 0.7 1.

13 18 18 14.3 19- 23. 1 155-?q.9 1.2 2.5 17 104 12. 8 0.11 o.q c.

14 0 34 9.0 19- 22.2 1 55-12 • 1 26.5 2.1 19 140 0.6 0.1 4 0.9 1

14 1 5 19.C 1<;- 3.3 155-2 4. 7 14.5* 1.1 q 289 30.5 O.A 5 4.4 
OF SEISMIC EVENTS (CONTINUED)

191C HR MN SEC lAT N LONG W DEPT'H MAG NO GAP OMI N ERT ERH 

NOV 14 11 8 22.4 19-24.1 12.6 1.6 14 7.7 0.10 0.6 

14 11 37 33.6 19-21.5 1 55-1 5.6 8.4 1.0 R 135 0.7 ('.1 5 0.4 

14 13 16 8.7 19-20.0 155-12. 1 lO.q 1.5 9 206 5'.6 0.2 '3 1.6 

14 15 36 10.2 19-23.5 1 55-2 3. <; 9.2 9 182 6.1 0.11 0.8 

14 19 48 33.9 155-14.3 7.4 1.3 16 212 6.6 0.11 1.0 

14 20 32 8.6 19-21.8 155-12.8 14.3 1.3 q 1 51 4.4 0.17 0.7 

14 20 45 48.4 19-21.1 155-36.91 9.6 1.4 7 204 23. f: 0.17 1.0' 

14 21 21 43.7 lc;-22.1 155- 4.5 26.2* 1.8 9 331 <1.3 0.34 "3.8 

15 5 43 13. 8 19-21.2 155- 4.8 16.8* 1.1 8 335 8.9 0.31 2.4 

15 1 q 3.8 19-20.Q 155-1 3. 7 13.3 1.2 9 3.2 0.22 0.7 

15 9 52 lC.8 1c;- 1 q. 6 1 55-15. 7 32.4 2.0 15 111 4.1 0.24 1 .5 

15 10 38 11.1 19-21.2 1 t;5-14. 2 8.5 1.5 15 156 2.2 0.12 0.8 

w 15 10 54 35.0 19- 31. 5 155-25.01 29.6 2.1 9 1 77 7.5 0.25 2.4 

15 10 56 41.2 19-23.1 155- 22.0 '>.7 11 145 4.2 0.1 7 0.5 

It? 12 59 22.'3 19-20.8 155-14.2 A.l Ie; 163 2.6 0.1 5 0.8 

15 14 21 '5C.4 lq.-33.6 156-1 6. 1 2.9 3.0 14 303 36.1 0.23 1.5 

15 22 22 39.5 19- 20.3 29.5 2.0 21 147 1.7 0.18 1.2 

16 0 33 43.2 18- 4 <;.2 155-23.2 26.9* 2.8 17 303 53.7 0.55 3.5 

16 4 2 51.6 19-20.1 155- 6.4 5.1 3.3 17 202 1.0 0.17 1.2 

16 4 23 48.7 1q-46.8 1 56-31.5 8.0* 3.3 14 315 79.2 2.53 15.3 

16 4 43 21.6 19-21.0 155- 7.8 8.2 1.2 13 192 4. 1 1.3 

IE- 9 17 26.6 19-20.2 155-11.9 il.A 1.5 10 206 5.1 0.26 1.4 

16 12 11 3".... 5 19- 20.6 155-12. 4 8.0 1.7 11 119 3. 0.1 2 1.0 

16 16 4 10.4 1q-1 0.9 155-16.2 10.3 2.3 13 251 1.4 O. 2.3 

16 20 2 46.5 19-19.q 155-25.4 6.6 2. 1 16 139 3.7 0.10 o.q 

16 20 24 6.0 19-19.9 155- 6.2 5.3 2.5 16 207 12.1 0.21 1.4 

16 20 51 55.9 19-1q.q 155- 1.6 6.6 1. 5 1.1 204 5.6 0.21 1.4 

16 21 q 3.3 19-10.1 155-34.J? 8.5 1. q q 266 10.4 1.42 9.q 

17 9 51 7.1 19- 24. 155-2 3. 8 10.6 1.4 13 171 7.5 ('.09 0.1 

17 12 21 25.1 19- 25.7 155- 26. 1.? 18.1 1. 8 12 168 9. 0 0.38 1.2 
StJMMARY OF SE I SM Ie EVENTS (CONTINUED)

1970 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMIN ER T ERH ER

NOV 17 14 2 30.1 1q-12 .1 155-26.2 23.3 1.1 10 234 15.7 0.63 3.0 6.

17 14 4 8.5 19- 6.1 155-26.8 2. 1 8 219 24.2 2.07 8.8 15.

17 14 (, Sq.o 19-11.4 155-22.67 3.4 l.S 11 235 16.4 3.2·4 0.0 43.

17 14 q 30.3 19- 7.3 155-28.01 45.9 2.3 10 262 21.2 1.63 ';.5 1 

17 14 11 1.6 19- 3.5 155-25.1 50'.4 2.4 13 211 29.0 0.38 3.8 4.

17 14 11 36.4 1<1- 1.8 155-23.3 15.8* 2.4 10 283 33.9 0.48 

17 16 11 25.1 19-21.4 155- g.5 11.1 1.3 1 269 1. 3 0.38 1.9 2.

11 11 12 44.1 19-20.2 155-11. 8 10.9 1.1 11 206 4.4 0.1Q 1..3 0.

17 lq 58 42.1 19-16.8 155-28.5 6.1 1.9 9 184 11.0 0.18 1.5 1

11 21 55 18.6 19- 21:.0 155- 5.11 28.5* 1.q 11 176 10.2 0.55 ';.9 

18 0 43 58.8 1q- 21.8 155-11.f 6.6 1.5 .10 1 74 2.0 0.18 1.3 C

18 b 1 57.8 19- 52. 3 1 55-46.81 0.0 3.3 11 133 19.6 0.43 0.8 2

18 15 28 32.2 155-1 1.2 3.1 2. 1 13 q6 0.9 0.06 0.4 0.

w

l.n 18 16 31 6.6 19-24.1 155-23.4 11.0 1.1 13 111 6.7 o.ot. 0.6 C

18 11 22 41.2 1 c;- 25.6 155-24.0 7.3 1.5 12 196 6.8 0.11 ".6 0.

18 21 40 44.5 19-19.4 155-15.9 8.1 1.8 I? 115 2. q 0.1 r; o.q C

18 22 25 33.3 1q- 23.1 155-25.0 10.1 1.2 11 203 6.2 0.16 1.1 c.

19 0 48 13.0 19-16.4 155- 0.61 30.3 1• .'3 q 244 25.1 0.49 3.q 6.

19 1 29 26.4 19-21.1 155-13.4 9.2 2.1 165 0 0.14 1.0 C

lC1 2 48 21.2 1c;- 34. 8 155-19.4 21.9 1.6 12 284 11.5 0.35 1.9 2

19 14 27 26.2 19- 23.4 155- 3.41 0.9 2.3 Ie 190 16.0 0.56 1 • 1 3

21 15 20 31.9 19-18.1 1 55-1 2. 6 11.8 13 228 8.3 0.18 1.2 1.

22 1 54 51.5 19- 21.4 155-42.1 6.1 2.5 12 281 14. q 0.84 3.Q 2.

22 2 36 21.8 19- 23. 1 1 55-1 7.0 I8.!? 1.1 12 13 0.7 0.07 0.5 0

22 3 21 34.5 19-21.5 155-17. 1 Zq.q 2. 2 14 106 2.6 0.44 1.7 3.

22 7 30 52.3 19- 24.6 155-29.5 12.2 1.0 13 1 93 13.6 O.OG 0.1 1.

22 8 9 28. 1 19-18.6 155-1 3. 7 10.1 1. 12 213 6. 5 0.16 1 • (l 0.

22 8 48 14.e 1q- 23.3 155-23.4 12.C; q 124 5.8 0.09 0.9 1

22 12 27 38.0 1q- 38. 0 155-41. C? 0.3 1.9 8 232 28. C 1.24 32.4 36.

22 13 46 51.4 lq-53.1 1 56-16.?? 84.6* 2.8 7 '300 61.6 7.84 A8.q 
SUMMARY OF SE I SM Ie EVENTS (CONTINUED)

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP N ER T ERH E

NOV 22 20 1 47.7 19- 22.4 155-14.4 6.6 1.4 11 1 3q 1.9 0.10 0.7 0

·22- 22 15 48.4 19-22.1 155-25. 5 12.4 10 1 38 5.2 0.1 3 o.q 2

23 3 31 44.6 19-1q. 3 155-15.9 S.A 1.2 14 1 78 3.0 0.1 1 (l.8 C

23 7 28 28.3 lq- 23. I) 155-21.31 11.2 2.3 15 96 9.4 0.07 0.7 1

23 12 2 37.1 19-1q.8 155-13.8 q.q 1.4 12 189 4.5 0.12 o.q c

23 15 32 15.8 1q-1 q. 2 155-13.6 10.1 1.3 11 203 5.5 0.14 1.(' 0

23 16 20 56.1 19-22.2 155- 9.2 8.1 1.8 8 305 1. 1 1.2 5 3.9 5

23 16 19.7 1q- 21. 5 8.5 1.3 7 162 4.8 1.0 c

23 19 23 54.4 19-27.5 155-21.1 11.3 1.4 B 265 8.0 0.11 0.1 0

24 1 34 32.1 19-19.4 155-11.61 3.0 1.4 6 2 2'5 s.q 0.14 0.1 0

24 14 5 43.1 19-12.2 155-34.41 4.3* 2. 2 q 247 6.9 0.61 2.6 

24· 16 26 55.4 19-18.6 155-26.1 11.1 2.1 13 1 ';6 5.1 0.12 1.0 0

24 19 51 36.1 19- 21. A 155- 6.2 G.2 1.4 10 316 6.3 0.57 2.8 C

w

0\ ' 24 21 3 40.7 19-18.4 155-13. 8 16.1 1.0 8 ZlQ 6.8 0.14 0.9 

24 21 19 19.6 19-18.4 155-28.41 q.'3 1.6 7 155 q.6 0.28 3.2 1

25 2 25 52.9 19-22.6 155-25.8 10.9 1.3 11 6.2 ('.21 1.5 2

25 3 42 . f.6 19-26.1 155-29.6 11.8 2.1 12 212 1.2.5 0.16 1.2 1

1 26 26.8 1 c;- 20.3 155-13.2 8.(\ 1 • 1 13 184 0.16 1 .1 0

25 1 43 14.8 19-19.4 26.8 1.9 10 Zqq 6.4 0.78 3.8 '

25 11 22 52.0 19-22.4 155":24.0 9.5 1.8 9 202 4.• 2 0.54 1.2 3

25 17 4 13.q 1q-l g. 8 155-13.4 11.8 1.2 13 191&. 5.0 0.22 1.2 

2S 19 37 3.4 19- 23.6 1'55-23.1 11.5 1.6 q 1 77 6.0 0.18 1.0 1

20 41 47.7 1 c;- 21.6 155-:'.4. 1. 1 1. 3 1.. 9 12 138· 2.9 0.09 0.8 0

25 21 16 51.2 19- 2 3. S 155-17.3 11.7 1.8 10 139 1.0 0.13 ].8 1

26 0 30 51.5 19- 21. 0 155-10.1 lC.8 0.8 q 185 2.1 0.10 1.2 0

26 7 11 5f.7 19-25.0 lSC5-11.4 17.2 1.4 9 233 0.6 0.12 0.6 C

26 15 2 29.4 1 <;- 22. 5 155-2 3.2 q.q 1.5 13 110 4.2 0.08 0.8 C

26 19 2 51.1 19- 43. 7 155-45.4 1 2. 8 10 153 28. 8 O.d 1 0.9 

26- 20 53 20.3 19-20.9 155-1.3.1 q.2 1.J 11 166 3. 2 0.18 1.2 C

26 21 21 21.8 19- t:.2 155-76.2 ? 16.3* 2.? 14 266 24.9 (\.41 3 .el 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMI N ER.T ERH E

NOV 27 6 4 11.0 19- 20.8 155-1 3.8 7.8 1.2 12 167 3. 2 0.17 1.0 C

27· 5 2 32.5 19-21.2 155-11.2 8.3 1.6 14 180 3.0 0.13 1.1 C

21 5 30 56.2 1<;-20.9 155- 8.0 7.1 1. 5 15 194 3. q 0.16 1.1 0

27 6 4 11.0 19-20.8 155-13.8 1.8 1.2 12 167 3.2 0.11 1.0 C

21 7 37 20.1 19- 20. 8 ,155-13.2 9.0 2.4 16 1 73 3.4 (' .11 o 0

27 15 34 49.5 19-15.4 lsr;-26.5 q.l 2.0 12 200 10.5 0.18 1.4 C

21 17 31 r;.2 19- 31. 4 155-24.7 13.8 1.7 13 1 35 3.8 0.11 1.1 0

27 19 46 22.7 19-18.7 155-12.6 14.8 1.6 1 226 7.5 0.12 1.0 C

21 20 2? 10.2 19-20.Q 155-11. q.9 1.S 1 182 3.8 0.15 1.7 

27 20 22 31.1 19-19. ') 155-1 O. 5 R.S 1.3 q 198 4.q 0.10 0.9 0

27 21 '57 32.4 1 q- 20.5 155-11.0 q.4 12 188 3.6 0.1 3 1.1 C

28 1 4 1.2 19-21.7 155-21.6 10.7 2.3 15 144.\ 5.0 0.01 0.1 0

28 1 43 20- 0.7 155-29.5 14.9* 14 211 " 1. C1 0.11 1 .1 

w

........ 28 2 3 17.. 1 19- 22. 6 155-22.6; 9.5 1.A 15 94 4.6 0.01 ".1 f

28 5 13 42.0 19-20.8 155-11. 15.2 o.q 10 195 3.6 0.10 0.7 0

29 16 2 19- 24.1 155-2 10.4 1.8 12 127 8.4 0.01 <".7 

28 16 18 21.3 19-1q.9 155-1 3. 1 14.5 1. 2 9 193 5. 1 0.1 5 0.6 128 20 52 9.3 18-Sc;.3 55-1 1.0 8.0* 2.1 it- 281 45.7 0.54 3.5 

2<; 2 1 4.8 1<1-25.2 155-17. 2 3.0 0.6 7 198 0.7 0.16 0.6 ·

Zq 5 13 55.<1 1q- 24.1 155-12. 3 8.8 1.5 11 25(\ 3.0 0.19 1.0 C

29 14 27 13.4 1 55-1 1. 5 14.0 1.2 B 196 3.A <'.29 1.0 2

29 16 21 13.6 lq-21.1 155-13.6 7.8 1.0 10 163 3. 2 0.12 0.8 C

29 16 23 26.5 19- 2 3. 0 155-23.q 12.4 1.1 12 156 5.3 0.1 3 0.9 

29 11 47 3.6 1<;-21.4 155-1 8. 3 28.0 1.7 13 13 2.8 0.32 1.r; .

2q 21 .3 lO.q lq- 23.1 155-25.9 8.1 1.6 12 216 6.9 0.16 1.0 

29 72 4 2R.7 1<;- 19.8 1 55- 36. 71 65.4* 1. q 8 194 9.1 0.22 1.q 

29 22 22 25.1 19- 21 .0 -I 55-1 2 • 6 9.1 1.0 q 1 74 2. 8 0.14 1.2 0

29 22 25 27.9 19- 21.1 155-12.9 q.7 1.3 11 168 2.1 0.11 1 .3 0

29 23 3A 53.2 19- 20. 7 1'55-11.0 1.2 1 210 3.3 0.23 0.9 

30 2 45 54.2 1<;- 22. q 155-22.1 1'1.8 12 108 I). 5· o.n 7 0.6 r
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR SEC lAT N LONG W DEPTH MAG NO GAP OPAl N ERT ER.H 

NOV 30 3 .30 21.3 19-20.2 1 3.0 8.7 2.-2 19 1 82 4. t . 0.12 1.0 

30 5 11 26.6 19-19.8 155- 9.9 1.3 1.2 10 254 4.2 0.26 1.6 

30 5 41 19.3 lq-19.5 155-1 1. 3 8.8 1.2 6 229 5.5 0.44 0.9 

30 8 4'5 5.2 19-19.7 155- 5.5 15.6* 1.5 8 322 8.7 0.38 2.8 

lO 9' 16 7.3 19--22.0 155-1 8. q 12.4 0.9 9 89 3.5 0.04 0.3 

30 14 27 27.0 19-21.1 1'5.0 1.2 10 208 2. :3 ·0. '33 1.3 

30 16 42 2.9 lq-21.3 155-14. 3 22.9 1.5 A 152 2.0 0.4-6 2.3 

"30 19 34 10.6 19- 31.4 155-4 C. 2 5.0 2.6 . 15 187 26.4 0.11 o.q 

30 20 6 38.6 lq-22.A 155-29.3 13.1 1 141 11.6 0.1 0 1.5 

30 21 11 19.2 19-21.3 155-1 C. 7 14.6 1.4 10 199 2.3 0.1 5 1 .2 

1 a 42 11. 1 1q- 20. 7 155- 9.7 11.0 1.1 6 254 2.5 0.14 1.2 

1 1 36 53.0 19-21.0 155-1 3. 8 8.3 1.0 13 163 3.0 0.16 1.0 

w 1 1 55 8.2 1 '55-24.6 8.0* 1.8 16 292 3f.7 0.21 1.3 

00 1 4 38 lQ.O 19- 20. q 155- 1.1 26.4* 1.5 7 3 20 5.? 0.21 3.3 

1 6 29 21.1 19- 21.8 155-18. 3 26.7 1.2 11 12 3.4 0.28 1.3 

1 7 5A 1.4 1s- 24.4 155-23.4 11.3 1.4 It; 116 6.6 <'.('5 () .4 

1 7 58 55.6 19- 20. 5 1 55-1 1. 3 0.1* 6 224 4.0 0.66 3.1 

1 9 56 21.6 19-18.3 155-11.2 14.1 1.2 7 248 1.4 0.29 2.3 

1 12 10 44.0 19-24.9 155-24. 3 q.1 1.4 13 121 7.9 0.04 0.4 

1 13 12 18.1 19-25.2 155-23.3 11.4 15 111 6.3 0.0'5 0.5 

1 13 13 7.0 19-1q.3 1 C; 5-1 2 • 4 12.r 1. 3 10 217 6. r'l 0.32 1.1 

1 14 1 56.0 19-13.6 155-2q.4 8.0* 1.6 4 217 12. 8 0.0 

1 14 2 53.1 19- 58.7 155-59.51 8.0 5 333 59.6 0.0 

1 16 27 22.2 1<1-1<1.1 155-12. 7 15.9 1. 2 9 211 6.4 0.2 5 1.5 1 18 17 29.1 19- 4.1 156-11.5 16.9* 2.3 14 317 o. 2.0 

1 18 20 2.<1 1<;-23.3 1 55- 24. 3 11.1 2.0 12 83 5.9 0.10 1.0 

1 19 14 43.1 19- 20.9 14.5 1. 3 10 215 2.8 O.OC\ 0.1 

1 21 16 59.6 19- 20. 1 155-14.2 9.0 ? l' lq 166 2.8 

1 23 21 46.3 19- 17. 7 155-15.4 10.4 1• ., 12 211 5.5 0.15 1.0 

2 0 0 1 21.7 1 .4 9.3 1.3 14 133 0.3 0.10 0.7 
Of SEISMIC E.VENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMIN ER, T ERH E

DEC 2 1 9 57.5 19-18.6 155-1 1.6 q.6 0.9 11 1 qe 2.1 0.01 0.5 0

? 2 28 26.7 19- 23.4 155-1 6.5 1 0.0 7 165 0.6 0.48 1.4 2

2 5 21 28.1 19-19.8 155- 8.21 12.5 1.4 1t 293 5.2 0.32 2.2 C

2 5 42 31.0 19-21.8 155-11. 1 27.4 1.7 13 102 2.3 0.41 1.5 

2 1 38 32.6 19-20.8 155-12.1 0.2* 0.6 6 20,2 3.2 0.0<) 0.5 

2 8 4q 43.8 19- 5.0 155-31.5 7.4 14 270 18. 2 1.09 4.1 2

2 10 21 20.8 19-21.4 155-11. q 0.2* 0.6 7 1 73 2.4 0.11 0.9 

2 10 47 21.4 19- 23.1 155-12.q 3.0 0.8 6 212 2.3 0.15 0.8 C

2 13 26 9.6 19-20.6 1 55-1 3.1 g.l 1. 2 11 180 3. 7 0.16 1.2 C

2 15 57 1.6 lq-32.4 155-41.0 1).9 2.0 10 Zql 31.3 2.35 10.5 4

2 16 10 0.3 19-22.4 155-16.1 21.0 2.1 15 <?5 ('.3 0.36 1.'5 32 18 39 59.0 19-20.5 1 55-12. 1.2 1.3 10 187 3.7 0.16 1.0 C

loU 2 19 0 '31. 0 19- 41."3 15'5-46.1 8.0* 1.6 8 316 46.0 0.14 1.t) 

\0 2 19 3 0.4 19-16.6 1 55- 2 8.0 33.9 1. 1 12 111 10.6 0.22 1.6 1

2 19 36 0.3 1q- 22.1 lS5-26.1 9.2 1. q 15 114 6.q 0.07 0.7 C

2 lq 38 55.3 19-13.1 155-50.8 8.1 3.0 15 265 24.3 0.15 4.0 1

2 19 46 41.4 1 c;- 20.4 155-13. 2 8.5 0.9 16 1 78 4.0 0.11 0.<;) C

2 19 54 42.3 19-22.1 155-1 3. 1 4.0 0.1 9 143 1.4 0.2 '3 1.3 2

2 20 0 53.5 19-20.6 155-1 2.6 0.2* 0.8 9 185 3.5 0.11 0.8 

2 20 3 58.5 19- 21. 6 1 55-1 2. 1 3.8 C'. 6' 6 158 1.7 0.08 0.5 "

2 23 49 58.5 19- 21. 2 155-11.8 '5.6 0.9 11 180 2.7 0.41 1.4 2

3 5 58 39.7 19-22.1 155-12.q 3.1 1.0 8 143 1. 1 0.1 3 0.9 1

3 12 51 34.1 19-19.0 155-1 5'.·1 13.8 1.0 10 188 3.t 0.19 0 •. 7 1

3 11 23 36.3 19- 23.3 8.5 1.0 12 149 4.2 0.35 0.8 

21 ·25 15.5 1q- 13.6 155-2 C. 0 2q.5 1. 1 14' 226 8.4 0.22 1.5 1

3 21 55 7.4 1<1-13.8 155-29.5 39.9 1.'5 13 211 1 3. 5 0.34 2.4 2

21 55 48.q 18- 28.2 1 '5 5-} q. 8? 11 2. 2 * 10 319 91.4 7.52 QO.8 

3 22 9 31.9 19- 21.0 1 55-1 2 • 14.8 1.4 9 1 7/... 0.07 0.6 C

4 5 51 8.3 19- 22.5 155-74.5 8.9 0.9 12 1 15 4.7 C .111 0.8 1

4 6 35 23.9 19- 19.9 1 55-1 2. 8 5.1 O. 6 7 199 5. 1 0.35 1.2 4
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1Q10 HR MN SEC lAT N LONG W DEPTH MAG NO GAP N EPT ERH 

OfC 4 9 34 54.7 19-21.6 155-1 3. 1 2.6 0.5 6 154 4.0 0.06 0.5 

4 13 q 4.2 19-20.4 155-25.3 8.0 1. 1 9 133 3.5 0.12 1.0 

4 16 31 10.8 19-16.0 155-22.6 4.9 1.2 11 204 1.8 0.25 1.5 4 16 35 58.8 19-13.3 155-21.8 3.1 2.0, 12- 224 13.1 0.82 1.6 

4 16 45 31.1 19-12.9 155-2 1. 8 2.4 3.2 11 227 10.8 0.68 1.4 

4 16 50 43.9 19-12.5 155-21.1 4.2 2.S 15 221 14.8 0.32 1.6 

4 11 26 43.3 19-16.1 155-22.2 11.3 1. 1 7 203 1.0 0.11 1.1 

4 11 43 155-1 3. 1 15.2 1.3 .., 20Q 6.() 0.18 1.7 

4 20 30 14.1 155-14.0 15.7 1.3 8 700 5.2 0.11 1.(' 

4 20 30 44.4 19-19.9 155-14. 9.9 1.3 13 118 3.8 0.09 O.A 

4 21 50 4C.l 19-12.8 155-21.4 '>.4 3.2 19 219 1(l. 7 f).30 1.5 

'5 1 32 26.1 19-12.9 155-21.6 3.5 2.8 11 21<1 7 -0.25 1.2 

5 1 35 37.5 19-21.3 155- 9.6 9.5 1.6 12 185 1.6 O.Oq O.q 

0 5 1 46 32.5 19-14.6 155-21.6 11.1 1. 5 13 232 B. 1 0.2 3 1.6 

5 1 '53 13.1 lq-13.3 155-21.9 5.3 1.9 14 216 12.9 0.24 1.3 

5 3 51 52.7 1f;- 27. 5 1 55-14. 2 28.6 2. '2 17 65 6.8 0.1'5 0.9 

4 23 26.6 19-15.3 155-22.3 1.1 1.7 14 208 8. 0 0.20 1 .1 

5 4 21 0.9 1 4 155-21.2 2.5 2.4 17 ? 21 14.9 O.Q5 1 .7 

5 6 2 33.2 lq-24.0 155-29. 1 12.4 1. 5 15 144 12. 3 0.22 1.1 

5 6 49 18.2 19-1Ci.5 155-16. 1 11.1 0.1 8 216 1.7 0.58 1.2 

5 7 1 7 25.2 1q- 20.1 155-10.1 14.q 1.4 10 219 3. 1 O.Oq 0.8 

5 7 56 9.2 1g- 26. a 155-12. 1 24.1 2.3 16 64 6.5 0.11 ('t • 1 

5 9 36 56."0 19- 15.4 155-22. 0 10.8 1. 4 10 217 7.5 0.16 1.2 

5 11 32 56.0 19-24.3 8.1 1.9 11 148 13.5 0.23 2.1 

5 12 2 42.<1 19-13. 7 155- 22. 1 31.2 11 214 9.9 0.36 2.0 

«; 12 51 2'5.0 1<1-15.9 1';5-27.3 11.? 1.4 6 201 1.4 0.06 0.5 

5 12 53 11.4 19-26.1 155-25.0 11.1 1.1 9 220 7.5 0.10 0.7 

5 14 31 50.7 19-15.3 155-22.8 1.3 12 211 8. 8 0.24 1.5 

5 15 55 6.3 19- 1.1 155-3q.7 8.8 2.3 1 324 15. 2 0.87 17.0 

5 16 lA 23.1 1(j- 1 c;. 8 1 '55--1 7. t) 10.1 1. 1 R 1 79 0.8 0.1 3 0.3 
SUMMARY OF EVENTS CCONTINtJEO)

1910 HR MN SEC lAT N LONG W OEPTH MAG NO GAP OMI N ERT ERH E

DEC 5 16 34 30.3 1q- 5.1 155-42.3 6.0 3.1 15 272 1 q. 3 0.99 ,4.0 2

5 11 59 45.1 lq- 2 3. Z 155-31. 1 11.7 3.q 18 115166.5 ('.Oq .6 1

5 18 6 35.9 19-18.1 155-3q.61 35.1* 2.1 1 279 7 •. 3 1.06 9.q 

5 lq 5 37.1 19-19.5 155-13.1 10.2 1.1 14 190 5.6 0.09 0.8 C

5 20 3 57.0 19-23.9 155-31.01 9.1 2. 3 13 1 33 16.6 0.11 0.8 0

6 4 58. C; 1 25.1 155-23.4 14.1 1.2 12 130 6.7 0.13 1 .2 1

b 6 4 21.6 19-1)5.6 155-35.8 26.9 2. 5 18 181 15. <1 0.1 8 1.1 2

6 8 11 20.9 19-23.7 155-17.11 10.0 1.1 12 83 1.6 0.24 1.1 1

6 9 1 41.1 19-23.q 155-25. 81 11.4 . 11 126 8.1 0.08 "'.6 0

6 9 41 30.7 19- 24.2 155-3 o. q 0.9* 1 161 15. 1 O.Oq 0.7 

l: 9 48 8.7 19-23.4 155-1 1. 3 14.3 1.4 13 82 ('.8 ('.1 3 1.0 1

6 13 26 46.1 19-17.8 155-14.5 1 '3 .1 1.0 7 226 6.f: 0.1 O.B 1

6 14 5 19.8 19-21.3 1 55-1 4. q 11.4 0.9 9 146 1. 2 0.07 0.6 0

6 17 21 36.9 19-23.1 1 55-15. <; 9.1 1.1 9 19(' 15. 3 0.1 2 O.q C

6 23 3 ·58.0 19-30.9 155-14. e? 8.0* 6 341 11. 2 1.6 B il.A 

1 2 q 51.9 '1'1- 1 55-33.01 8.0* 1. A 13 290 ".73 4.9 

7 3 10 43.6 19-20.9 15':-12.9 14.1 1.0 10 1 74 4. f. 0.22 0.9 1

7 13 43 55.8 19-13.1 155-21.5 40.0 2.0 10 248 10.2 0.24 1.1 1 

7 15 11 44.0 19-20.1 155-12.3 1.6 1. 3 12 199 4.4 0.18 1.3 0

1 16 13 55.2 19-19.5 15'5-15.7 10.1 1.2 10 1 71 3.2 0.09 0.7 e.

7 18 19 35.5 19- 20.8 155-25.0 8.8 1..1 14 128 3. 1 O.Oq O.A 0

7 19 32 52.6 19-'30.4 155-10.0? 8.0* 1.3 5 34A 1 5. q 0.1 A 40.4 

7 20 35 31.1 19-20.6 155-11.3 9.1 1. 0 9 208 3.9 0.09 0.7 0

1 22 40 1.1 1q- 23.8 1 54-5 q. 1 10.0 1.8 12 203 14.4 0.27 .3.0 1

8 0 20 8.3 19- 20.1 155-1 5.6 q.1 1. '1 12 163 3.1 0.6 C

8 1 24 53.4- 1 '55- 2.1 4.8 1.6 10 262 21. 5 0.64 3.0 1

B 4 9 19-23.3 1 55-1 1. '2 14.7 1.4 12 110 2.7 0.13 1.0 1

8 6 32 22.8 19- 20.6 155- 8.6? 11.3 0.<; q 194 3. 5 0.1 7 l.f.. e.

8 7 18 14.6 1Q-20.7 155- 4.4 4.6 2.5 16 206 9.7 0.23 1 .5 C

8 1 48 SG.6 1 q- 2 1 55- 24.1 10.9 1. 3 10 129 5.4 0.<' 7 0.1 0
OF SEISMIC EVENTS

197C HR MN SEC LAT N LONG W DEPTH MAG NO GAP OMI N ER T ERH 

DEC 8 10 59 14.7 20- 0.6 155-51.8 0.3 2.7 18 148 4q.5 1.16 1.3 

8 13 44 59.5 19-19.4 155-16.1 8.8 1.6 14 114 2.1 O.lC 0.8 

8 16 22 23.5 19-21.7 1 55-38. 7 11.4 2.5 14 134 A 0.21 2.2 

8 20 43 43.6 19-19. ') 155- 2.0 1.0 2.2 13 224 14.5 0.45 2.9 

8 20 53 18.2 19- 2f.l 1 55--29. 3 11.0 2. 3 16 83 12.5 0.07 0.5 

9 5 0 41.3 lq-23.7 155-3 C. '3 8.4 2.4 18 98 13. q 0.15 1.2 

q 5 2 52.2 19-41.5 155-15.3 39.5 2. 5 15 186 23.4 0.31 1.1 

q 6 51.8 19-11.1 155-24. 1 6.9 10 11CJ 5.8 0.12 0.<1 

q 6 39 40.c; 19-38.3 155-56.4 4.2* 1.7 q 323 54.8 1.45 8.7 

q 1 53 lq-21.1 155- 9.1 1.4 11 254 1. 8 0.19 1.3 

<; 9 6 16.2 19- 20. 2 155-16.4 30.3 1.9 q 182 1.1 C.21 1 .1 

q 11 36 55.4 19-22.9 155-34.1 1.8 1.8 8 235 15. 4 0.82 4.5 

CJ 18 29 29.5 19- 24. '5 155-23.51 10.1 0.9 10 12q 6.8 0.06 0.6 

N '1 18 42 0.7 lQ-lO.3 155-31.4 7.7 1.9 1 2 q7 8.6 1.41 8.A 

9 21 32 40.4 19- 21.0 1.'.· 1.3 11 1 qO 3.2 0.18 1.1 

q 22 33 q.l 1 q- 23.2 155-23. 3 9.4 1.4 15 113 5.6 0.10 ".Q 

9 22 33 50.8 19-23.2 155-23.4 9.C; 2.0 14 ll£. 5. f 0.01 0.6 

10 2 0 17.A 19- 21. 3 155-1 1 • 5 14.7 1. 1 10 1 80 2. 8 0.08 0.7 

10 4 32 28.3 lq- 23.0 155-22.3 9.3 1. 1 11 149 4.8 0.10 0.7 

10 5 53 31.7 19- 5.5 155-24.2 25.6. 1.7 16 269 25.0 O. '31 2.1 

10 10 q 4('.0 1c;- 24. 1 155-2Q.O 11.1 2. 4 14 c)4 12.3 0.06 0.5 

10 17 q 34.2 1 <1- 20.1 lc;l:)-ZQ.3 9.5 1.5 7 133 10.5 0.20 2.3 

10 18 43 34.2 19- 24.6 155-17.3 9.0 1.0 12 1 0'5 0.4 0.06 0.4 

10 lA 44 11.5 19-24.1 155-11.7 q.1 1.3 11 72 1. 2 O.Oq 0.6 

10 20 26 35.8 19-20.9 155-19.8 2.6 0.3 q qq 4.5 0.01 0.3 

10 20 28 5.9 19-23.4 155-22.1 9.1 3.6 85 f,.3 0.0 0 0.7 

10 20 33 34.1 1<1- 23.6 155-72.6 1.2 0.7 q 162 5.0 0.20 0.5 

Ie 23 20 14.4 1c;- 21.0 1 55-1 1. 6 q.8 1. 3 14 181 3. ? 0.13 1 .2 

11 1 15 24.0 19-14.4 155-38.0 11.3 2.1 7 798 1.9 0.05 0.6 

11 1 30 51.1 19- 23.6 155-16.3 1.1 0.4 7 1 31 1.0 n 0.4 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

lQ1C HR MN SEC LA T N LONG W DEPTH MAG NO GAP 0'" N ERr ERH E

nEe 11 8 30 24.1 19-19.1 155-15.5 9.1 1.3 q 188 3. 8 0.14 1.0 C

11 14 5 26.1 19-16.9 155-1 1.5 17.3 1.8 8 261 10.0 0.38 1.9 3

11 19 15 50.2 19-2c.e 155-25.0 8.6 1. 1 10 128 3.2 0.13 1.0 1

12 0 50 50.2 19-16.3 1 '55-24.1? '36.0 2.0 15 192 7.4 0.76 4.5 6

12 0 51 2.2 19- 26.9 155-15.'3 2.1 o.q B 305 4.8 0.88 3.6 1

12 1 38 35.4 1 q- 3C; .3 1';6- 7.31 8.0· 2.8 13 217 22. "3 1.24 8.4 

12 5 25 51.3 19- 23.2 155-28.9 11.2* 1.0 11 1 76 11. 3 0.12 1.0 

12 10 8 16.4 lQ-,22.0 155-14.2 24.6 1. 7 14 137 1. c;J 0.28 1.3 2

12 10 55 6.6 0.1 0.1 q 94 0.4 0.14 0.6 1 8

12 12 40 q.3 19- 24. 4 1 55-1 7.41 c. () 0.1 8 107 0.6 r.l1 r'\.5 <

12 1S; 11 55.4 1q- 21 • 2 15f)-2 8.61 10.4 1.6 10 1 77 q.4 0.17 1.8 2

12 16 28 41.0 19- 21.1 155-19.51 8.0* 1.2 7 348 4.6 1.1 5 6.9 

12 18 56 40.6 19-2G.1 155-15.41 B.O* 1.4 8 325 8. 8 0. 2 7.0 

w 12 19 40 2.4 1<;-21.3 155-15.'61 1Q.9 1.4 1 310 5.0 2.00 10.1 45

12 19 40 50.4 1 21.1 155-1 C. 8 6.7 1. 1 9 204 2.6 0.3 q 1.7 2

12 20 14 37.6 19- '3 f: • 1 155-21. l' 24.2 2.5 17 205 20.4 0.1 6 0.9 2

12 20 59 25.0 1'1- 23.5 155-22.31 8.0* 0.9 7 321 7 1.45 41.3 

12 21 6 31.1 19- 27. c; 155-21.67 3.5 o.q 6 8.0 1.13 11.0 4

12 21 1 1 48.4 19-76.9 155-15.0 5.2 0.9 " 327 5.1 1.42 8.5 7

12 21 19 20.2 19-23.6 1 55-16. 3 2.9 0.2 7 1 76 0.9 0.41 1.0 2

12 21 30 11. 2 1 <;- 21 • 7 155-14.e? 8.0* 1.3 6 335 6.4 ::).49 6.0 

12 21 40 58.? 19-28.1 1 55-14. <;1 8.0* 1. 1 6 335 6.8 0.56 f).1 

12 23 3 27.9 1 q-,18. 4 155-13.1 16.8 1.2 9 21Q 6.8 0.18 o.q 

12 23 1 58.0 1<1- 24. 3 15,5-1 1. '1 0.1* 0.5 11 q3 C.8 0.08 0.5 

12 23 51 36.5 1q- q 155-16.8 1.9 -0.1 7 156 0.1 0.22 0.6 

13 0 51 52.1 1<;-24.0 155-1 q. 4 7.9 0.8 1 291 3.5 l.C 3 13.2 1 1

13 2 20 6.1 19-18.7 8.8 21.3 2.0 1'5 2 '54 6. 5 0.47 3.4 4

13 4 28 51.0 1'1- 22. 1 155-25.01 11.0 1.1 12 134 4.6 0.09 1).8 1

13 4 54 21.3 19-19.9 155-1 3. 5 15.1 1. 3 8 190 4. 7 0.05 0.4 0

13 6 5 28.7 19-28.5 155-16.41 8.0* 1.2 1 318 6.1 0.46 6.0 
OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC, LAT N lONG W DEPTH MAG NO GAP ER. T fRH 

OEe 13 6 12 13.C lq-26.2 155-12.91 9.1 1. 5 6 333 7.5 2.42 20.0 1

13 6 1'6 40.1 19-28.8 155-1£:'.11 3.2* 8 321 6.5 1.16 C;.4 

13 6 41 53. 8 19- 23. b 155-16.3 1.9 0.5 8 181 1.0 0.40 1.2 

1.3 7 3 26.0 19-113.• 1 155-12.5 15.3 1. 5 q 236 8.4 0.09 0.6 

13 7 23 q.2 19-28.2 155-14.51. 8.0* 1.3 8 319 1.4 5.2 

13 7 44 27.6 19-24.9 155-16. 11 3. 2 1. 3 10 184 1.6 0.1 f, 0.8 

13 6 2 .• 4 19-41.4 1 '56- 5.11 16.5* 3.6 21 269 25.5 0.49 3.3 

13 8 32 11.8 19-24.1 155-1 6. 5 ?6 (') .1 1 185 1.4 0.71 -'1.5 

13 8 55 19 •. 6 19-20.6 155- <1.1 20.7 1.4 9 755 2.8 1.4 q 6.1 1 

13 9 1 12.8 19-25.7 155-15.2 3.2 0.5 6 311 3.4 1.01 4.2 

13 10 26 47.9 19- 24.3 155-1 1. 1 0.1* 0.0 6 116 o. A 0.13 O.A 

13 10 41 43.9 19-26.8 155-16.0 4.1 o.q 8 304 3.8 0.61 3.6 

13 11 26 35.4 19-21.6 155-1 3.0 14.5 1. 3 10 154 1. q 0.20 

13 11 56 27.7 .1 155-15.2 5.6 1.0 1 305 3.2 0.58 3.2 

13 12 44 24.5 19- 1 1'55-14.21 0.4 1.6 1 326 9.9 1.0Q 4.7 

13 12 4q 18.1 19-24.4 lC;S-1e;.9 3.0 0.3 q 231 2.2 0.41 1.6 

13 12 50 50.1 1 q- 29.9 1 55-14. 11 1.5 7 3 '31 9.1 1.1 3 7.7 

1'3 14 40 13.6 19- 2 3. 9 1 15. q 2.4 0.4 8 208 1. 1 0.32 0.'3 

13 14 43 36.4 19-21.6 155-16 • .1 5.6 1.0 8 311 4.8 1.10 5.9 

13 16 59 48.1 19-24.1 155-16. 81 2.5 0.6 8 704 0.6 0.76 2.6 

13 19 20 24.2 1'1-17.8 155-27.4 1.5 1 • 3 q 117 8.5 0.25 7.6 

13 20 (l 21.4 lq-22.q 155-23.6? 11.4 1.4 14 1 13 4. q 0.') 1 0.6 

13 20 2 8.2 19-25,.6 15';- 2 b. 8 9.1 l.q 15 189 <;. A 0.22 1.6 

13 20 3 24.0 19- 23.9 1 55-16. 7 2.8 0.2 1 162 0.9 0.28 0.7 

13 22 3 4<1.5 19- 2 g 155-16.2 2.2 0.3 8 193 1. 3 0.30 0.8 

13 23 22 22.4 1 2 3.0 155-23.6 12.4 1.0 8 124 5.3 0.08 0.<) 

13 23 51 49.2 19- 27.0 1 55-14. <71 8.0* 1. '2 q 306 r;. '3 0.25 3.5 

14 2 3 3.4 19- 2 7 155-16.3 2.6 o. 1 7 1 79 o. q 0.3 3 0.8 

14 3 6 23.8 19-20.0 155-13.2 13.2 1.2 10 192 5.0 0.27 1 .1 

14 3 17 1.6 1q- 24.0 155-16.1 1.6 ().1 R 16A 1.1 0.20 f).6 
SUMMARY nF SEISMIC EVENTS (CONTINUED)

HR MN SEC LAT N LONG DEPTH MAG NO GAP OMI N ERT ERH E

DEC 14 3 48 39.2 lq-19.1 155-24.C; 8.0 1.4 13 149 3.5 0.14- 1.0 1

14 3 4q 10.8 1q- 25.5 155-14. 2 0.3* 0.6 6 321 5.1 1 3 3.1 

14 3 57 34.0 19-23.1 155-16. 1 2.0 O. 1 7 145 0.5 0.65 2.0 4

14 4 14 50.9 19-19.1 155-25.2 1.3 1.2 11 150 4.0 0.16 1.3 1

14 It 46 24.1 19-23. 8 155-16. 7 3.0 0.0 1 151 0.7 0.26 1).6 1

14 5 21 16.2 19- 23.9 155-16.6 1.9 -0.0 7 111 1.0 0.1 q 0.5 1

14 . 5 26 46.4 19-23.8 155-16. 1 i.6 -0.1 1 160 O.A t).28 r.B 1

14 5 56 44.6 19-23.0 155-21.1 11.6 1.2 9 1 A7 9. 2 0.12 1.1 3

14 6 4 35.0 19- 20. 7 1 55-1 2 • 8 8.4 1.6 16 119 3.3 0.13 0.9 C14 6 Zq 10.1 19-23.3 155-16.6 2.4 0.4 1 155 0.4 0.52 1.4 3

14 8 0 26.0 155-13.9 13.1 1.3 10 197 5. 1 0.t8 1 • 3 C

14 10 37 55. 9 19-23.5 155-1 6. q 11.q 0.1 13 108 0.3 0.07 0.5 0

14 11 36 35.1 155-16.5 3.4· 2.0 13 12q o.q 0.10 1

14 13 19 50.6 lQ-'30.2 1 '55-1 3. <11 8.0* 1.1 10 282 11. 0 1. 1 8.1 

\J1

14 17 12 5.8 1<1-13. 155-28.1 1.4 1.7 12 212 14.5 0.29 1.9 1

14 18 28 57.6 lq- 9.5 1'55-25.41 0.8 1.5 11 246 1 9. 5 1.14 8.0 1 8

15 0 0 52.2 19-20.6 155-10.6 14.8 1.4 q ? 22 3.1 0.20 1 • 1 1

15 1 26 10.2 19- 21. 1 155-12.6 14.0 1.4 9 113 4.C1 0.18 0.7 1

IS' 2 13 22.1 19-22.5 155- 1.1? 11.2 1.1 q 324 4.1 Q.G 0 3.3 C

15 3 13 q.4 19- 14. 7 155-15.41 18.4 1.8 12 270 8.3 0.82 4.8 1

15 4 44 38. 1 19-18.9 155-1 5. S 14.5 1.3 9 192 3.9 0.11 0.4 C

15 15 19 38.4 19-1<';.8 155-13.2 7.7 1.4 12 195 5. 1 0.1 5 1.1 C

15 15 52 33.3 19-20.8 155-13. q 8.5 1. '3 13 166 3. 1 0.14 1.0 C

15 16 40 13.3 19-16._4 155- 1.1 33.2 1.8 15 244 1 7. 7 0.28 2.0 2

15 lq 56 2.3 19-23.2 155-25.11 11.4 1.8 15 121 6.4 0.06 0.6 C

15 20 13 f:.2 19-19.2 1 e.; 5-1 1 .4 15.3 1.C; q 2 33 6.0 0.22 1.2 1

15 20 18 14.3 19- 23.3 155-26.0 1.7 2.2 17 ql 7.4 0.10 0.9 

15 21 39 11. 1 1q- 21. 1 55-1 3. 7 9.5 1. 3 11 158 3.0 0.14 1 .0 0

15 22 3 33.2 19-20.8 155-12.8 (j.1 1.2 10 118 4.8 0.2 1 1.6 1

16 2 30 32., 19- 3C. 6 1 55-5 C. 8 24.7 3.1 18 1 "36 8.0 0.54 2.e 
SUfvlMARY O'F SfISMIC EVFNTS (CONTINUED)

1910 HR MN SFC lAT N LONG W DEPTH MAG NO GAP 0"-1 N ERT ERH 

DEC 3 31 43.9 19- 21 .3 30.6 1.8 13 1 31 1. C; 0.55 2.1 

16 6 16 55.5 1q- 20. 5 155-17. '5 24.7 2.3 15 86 r.8 0.35 2.6 

16 6 38 30.1 19-21.9 155-18.2 24.9 2.0 13 12 3. 7 0.21 1.1 

16 8 49 39.1 19- 22.3 155-23.4 9.5 1.2 12 114 3.9 0.09 0.6 16 10 46 38.4 lCi-22.3 155-18.3 24.5 2. 1 15 68 3. 3 0.16 1.0 

16 13 48 51.4 1 g- 21. 3 155-19.6 20.2 1.4 10 164 4. 4 0.11 0.6 

16 14 53 3C.3 1<1- 20. 1 155-12.2 8.6 1. 3 q 200 5.6 0.11 1.2 

It: 15 24 0.3 19-20.4 155- 7.4 25.4* 1.1 8 310 5. 3 0.18 2.5 

16 16 3 19.0 19- 21. 7 155-7 3.81 10.9 1.6 12 1 21 3.-0 o.oe '::'.1 

16 lq 15 18.2 19-19.4 155-16.6 10.6 ' O. 7 8 206 1.9 0.23 0.5 

16 19 22.1 19-1C;.6 155-17.1 10.3 0.7 8 I R6 1.1 (1.41 n.B 

16 20' 2 31. 5 19- 24.4 1 55-1 7. 6? 0.0 O. 7 10 gO 0.6 0.1 3 0.6 1

16 23 13 1.6 1Q-20.1 155-12.6 11.0 1 • 1 12 1 81 3.3 0.14 1.0 

+:0-

0' 11 2 27 8.0 19- 22. 5 155-1 1. 5 11.6 1. () 13 70 2.1 0.12 1.1 

17 4 28 42.9 19-21.3 155-10.2 8.7 1.3 11 224 1. 1 0.2 5 1.4 

,.' 17 5 3q 26.2 19-2C.l 155-1 1.9 10.9 1. 1 12 ? 05 4.5 0.1 6 1 • 1 

.' 11 31 41.8 19-1q.6 155-1 3.4 11.7 1.3 12 198 5. 3 0.24 1.3 

..

17 11 22 42.5 19-51.6 155-28.6 2f).q 3.4 11 162 8.9 r.8 

17 14 41 32.4 1q- 1g. 9 155-1 C. 01 15.0 1. 2 7 252 4.2 0.36 1.5 

, . 11 15 12 0.5 19-1C).5 155-10. 7 8.3 1.9 12 241 5. 1 0.33 1.7 

18 6 3 32.0 1q- 23. 2 155- 3 7.6 11.4 2. 7 13 118 15.4 0.16 1 .1 

18 1 58.q 19-18.9 lsc;-23.1 7.4 1.2 10 249 2.4 0.14 2.3 

18 8 42 32. 1 1 q- '30. 4 8.0* l.c 7 329 C1.4 r.82 7.6 

18 16 58 31.3 19-19.4 155-15.q R.7 1.7 14 1 75 2.9 '0.1 ? 0.8 

1<1 14 14 59.4 19- 20. 5 1 55-12 .8 7.4 1.6 12 1 86 3.A 0.19 1 .1 

20 11 0 8.9 19- 22. <1 15 '5- 2 2. 1 10.6 1.5 10 101 8. q 0.08 0.9 

20 11 1 56.1 19- 23.9 155-17.1 1.9 1.0 8 124 1 •.2 0.1 0 0.8 

2C 15 52 55.2 1 <'1- 2 <;. 4 1 55-1 5.41 8.0* I. 6 6 337 A. 3 0.94 q.o 

20 16 25 35.5 19- 20.6 1 '3.•4 l.? Ei 1 18 £..4 0.1 1 Q.7 

20 11 58 27.0 19-13.4 155-3 1 • 1 33.9 3.2 18 216 1 0.9 0.1 8 1.0 
OF SEISMIC EVENTS (CONTINUED)

1910 .HR MN SEC lAT N LONG W DEPTH MAG NO GAP DMI N ERT FRH F

DEC 20 20 44 16.q 20-12.1 155-14.6 10.8 2 .'0, 18 261 51.4 0.98 6

21 2 13 32.2 19- 32. 2 155-37.8 8.2 3.1 18 89 25.8 0.26 1 .1 1

21 2 33 21.1 19- 31.8 155-31.1 1.9 2.5 16 123 24.3 0.16 Q.8 C

21 2 24.4 1q- 32.3 155-38.R 7.5 2.2 12 221 27.5 0.31 1 .3 1

21 2 12.4 19-32.1 155-36.6 <;.0 2. 3 13 123 23.6 0.19 O.Q 1

21 10 33 51 .2' 19- 19 • 9 . 1 5'5 -1 3 • q 8.7 1.7 14 185 4.2 0.1 4 0.9 C

21 11 1 1 56.2 19-23.7 155-19.2 ? 0.6 1. 0 6 284 3.4 0.26 1.6 3

21 .12 45 45.9 19- 21.2 155- 9.1 1.6 1.7 12 284 2. 1 0.22 1.2 C

21 13 1 55.3 19-26.4 155-2 1.81 8.8 2.4 14 106 3. 0.15 1.4 1

21 13 51 15.7 19-18.8 155-15.4 12.9 10 191 4.2 0.11 0.5 0

21 18 27 36.4 27.6 155-12.61 0.0 1.9 11 282 9.7 0.72 4

21 lq 15 30.7 19-18.8 155- 9.5 28.7 2. 0 10 26q b. 1 0.50 ?6 

21- lq 20 25.4 15')-49.9 4.5 3. () 18 214 2 0.5 0.28 2.9 1

-...... . 21 20 20 39.6 19-24.2 1 55-16. 9 13.2 1.6 15 1 11 1.2 0.06 0.6 0

21 22 52 7.1 19-19.1 15 1 3. 8 1.9 11 204 5.7 0.'23. 1.3 C

21' 0 2'3 38.1 19.- 18. 8 154-5 e. q 30.2 2.0 A 241 20.0 C .44 ?2 3

22 0 24 1.4 19-4q.8 155-58.8 6.5 2.9 18 241 34. q 0.35 2.6 3

22 0 52 20.7 1<;-18.R 155-1 2.6 15.2 8 2?4 7.3_ 0.1 (! 0.6 

22 2 42 18.0 19-,24. 5 155- 3.4 2.9 7. 1 11 181 12. 1 O. ') '3 1 .2 2

22 5 27 20.3 lq-lR.3 155-13.2 ' 9. C; 2.1 16 201 7.5 0.18 1.2 0

22 5 2q 4.1 19- 1R. 0 1 C; 5-1 2. 9 8.9 '11 211 8.2 0.27 1.8 1

22 5 48 42.3 19-18.6 155-13.4 <1.6 2.4 17 200 6.8 0.15 1 .1 0

22 5 53 56.4 1 11 • 8' 1 55-+ 1 2 • l' . 8.5 . 12 ? 12 8.6 C'.26 1.7 C

22 6 2- 11.5 19-18.1 155-13. 1 q.O 12 208 7. 8 0.19 1.3 C

22 6 19 51.3 19-17. 7 8.4 10 214 8. 5 0.28 1.9 1 

22 6 59 54.4 lCj-20.9 ' 155-1 9. q 1.9 1.3 11 qq 4.1 a.as 0.3 C

22 A. 21 50.5 1q- 25.9 11 .1 0.8 8 289 1.0 0.48 2.0 2

22 q 16 41.2 19-17.q 1 2. 5 14.8 1.4 10 240 8.8 0.! 8 1.3 o

22 16 6 2.9 19-22.1 1 55-1 8". 8 3.4 0.2 10 8f-. 3. L;. 0.01 0.3 l.

22 16 1 r; 56.4 19- 24. a 155-16.7 2.4 0.0 7 166 1.2 0.76 ,.., .7 1
SUMM.ARY OF EVE"'TS (CONTINUED)

1910 HR MN SEC, l4T N LONG W DEPTH MAG NO GAP OMIN ERT 

DEC 22 18 42 45.4 19- 25.3 155-17.0 8.0 1.1 8 168 0.7 0.11 0.8 

22 20 29 22.4 19- 30.9 155- 7.11 8.0* 2.3. 8 323 19. 7 1.11 20.6 

22 21 0 31.3 1q-13.6 155-23.2 34.C 2.8 14 220 11.4 0.57 2.2 

22 21 13 51.4 lQ-14.0 155-23.4 32.5 1.6 14 216 11. 1 0.42 1.8 22 21 42 22.4 19-24.1 155-16.1 0.1* 1.2 8 111 1.7 0.08 0.5 

22 23 1 23.8 19- 21.1 155-12.0 6.9 1.8 10 160 4.0 0.05 0.5 

22 23 9 46.1 19-24.4 155-16.0 0.3*-0.0 6 221 2.0 0.13 0.6 

22 23 23 13.2 19-25.4 155-22.31 0.9* 1. 3 6 332 8.3 1.09 4.4 

22 23 29 12.5 19-18.1 155-1'3.1 8.1 2.1 15 201 6.8 0.20 1.4 

22 23 31 51.0 19-17.7 155-12.2 13.8 1.2 1 244 9.1 0.21 1.0 

23 0 3 21.6 19- 24.6 2.1 1.2 q 167 1.5 0.10 0.1 

23' 0 4 21.6 19-24.5 155-16.01 1.2 1.6 10 165 1.9 0.1 3 0.6 

23 0 37 15.2 19-23.1 1 55-1 8. 71 8.0* 1.8 7 211 3.3 1.83 21.6 

00 23 2 2 37.9 19-31.9 1 55- 8.1? 8.0* 2.4- 9 312 20.2 1.1 2 18.4 

23 2 10 51.9 1q- 28. 6 155-14. C;1 8.0* 1. 8 8 320 1.4 0.54 5.2 

23 2 11 39.3 155-19.21 1.2 1.6 7 303 8.8 4.00 0.0 5

23 2 13 30.4 19-21.9 155-1 6.41 1.9* 1.4 6 '321 5. 1 l.SR 25.1 

23 3 8 33.2 lq-28.5 155-2 0.31 8.6. 1.e; 6 3 r;2 7.4 1.31 1.A 

23 3 25 39.4 19-24.9 155-17.6 1.3 1.1 11 86 0.3 0.10 0.6 

23 3 43 31.9 19-' 27.6 155-18.21 6.5 1. 5 6 347 4.1 1.54 21.5 

-23 3 46 10.4 19-27.6 155-!S.6? 8.0* 1. 8 6 350 4.3 1."30 7.'3 

23 4 0 26.3 19-25.8 155-19.6 6.2 1.2 7 321 3.5 0.80 12.q 

23 4 9 0.2 19- 24.5 155-1 7.3 0.4 1.5 12 14 0.5 0.10 0.5 

23 4 25 39.1 19-28.0 155-13.31 8.0* 1.9 10 216 8.1 0.81 5.1 

23 4 21 5.4 19- 32.1 1 55-15.41 8.0* 2.0 1 333 12.9 1.59 12.2 

- 4 32 0.2 19- 27.4 155-16.3 4.8 1. 1 7 309 4.3 1.29 6.1 

23 4 53 17.3 19- 21.1 155- 6.5 5.4 2.3 14 197 15.5 0.0 8 0.6 

23 4 59 13.5 19-19.9 155- 6.1 5.7 2.3 13 201 7.6 0.23 1.5 

23 5 4 11.2 19-26.1 155-21.41 5.3 1.1 6 340 1.0 1.88 30.5 1 

23 ·5 14 30.2 19-2t.5 155-16.4 3.6 0.8 6 301 2.q 0.14 0.<) 
SUMMAR.Y OF SEISMIC EVENTS (CONTINUED)

1910 HR. Se:C LONG W OEPTH MAG Nl) GAP ERT ERH 

DEC 5 22 0.8 lq-24.2 155-15.4 0.5 O.q 6 237 2.8 0.31 1.5 

23 34 28.2 1q- 21.9 1 7. 3 '5.1 1.1 1 336 4.6 0.18 14.4 

23 6 8 54.8 19- 21.2 1 55-18. 31 8.0* 1.3 6 349 3.5 1 .3 r; lq.4 

23 6 36 14.2 19-2f.5 155-19.q 5.9 1.2 6 339 4.6 1.63 21.6 '23 1 5 40.5 1q- 20.6 155-10.3 ,1.7 1.q 11 235 3.0 0.17 1.0 

23 7 14 18.0 155-1q.2 8.0 1. 2 7 285 4.3 0.80 10.3 

23 8 0 34.3 19-24.6 155-15.81 l.q -0.2 6 244 7. 1 0.42 2.7 

23 8 14 32.9 1C1- 47. 1 155-14.6 7.5 1. 5 13 2 11 18. 3 0.82 7.7 

2'3 8 23 38.9 19-25.5 155-16.• 9 '8.0· 0.2 5 303 1.2 0.26 3.8 

2'3 10 14 14.5 19-16. 7 155-26.9 1.A 1.q 12 119 q.l 0.13 1.0 

23 20 22 21.0 19-19.5 155-15.3 1.5 0.9 12 180 3.8 0.11 1.0 

23 20 40 49.5 19-27.0 155-24.1 8.5 1.4 13 115 4.2 0.12 o.q 

23 22 44 18.9 19-21.q 155-1 3. 1 . 2.5 1.0 1 146 3.8 0.10 0.7 

\0 24 1 3 36.3 19-23.3 155-27.0 12.2 1.2 ] 0- 227 8.7 0.12 1.0 

24 3 ·54 ZC}.2 1q-17. 4 155-12. 7 <1.2 1.7 11 217 q.3 0.27 1 .8 

24 l .. 32 3q.7 19- 21.2 155-28.3 9.8 l.q 13 124 8.9 0.09 1.0 

24 6 16 47.7 19-24.4 155-22.1 9.1 1.2 12 152 6.3 G.11 1).8 

24 8 lq 3.3 19-24.4 155-1 b. 8 2.3 0.9 9' 148 1.4 0.08 1.0 

24 9 24 5.2 19-21.5 1 55-1 1 • 7 9.1 2.4 15 110 3.5 0.11 1.0 

24 11 19 35.8 1<1-2f.l 1 55-1 5. 7 5.4 (".8 1 285 3.1 1.01 9.5 

24 12 41 47. 1 19- 25.4 155-15.91 0.1* 1.3 q 177 2. 1 0.12 0.6 

24 23 17 19.6 lq-lq.q 155- 1.4 5.6 2. f; 13 204 5.9 e.25 1.7 

25 0 35 36.1 155-34.17 8.0* 2.1. 7 348 28. 8 c;. 1 5 92.1 

25 1 0 18.4 1q- 26. 1 155-23. 7 10.8 2.5 15 7(' 5.q o.c·.g o.q 

25 2 59 33.7 19- 2 3. 5 155- 2.8? 2.4 1.8 10 191 12.6 0.19 1.7 

25 4 54 0.8 1 q- 2:3.0 1 55-1 8. q? 8.0* 0.7 3.8 1.23 6.5 

5 41 25.q 19- 22. a 155-) q. 81 0.2 * 0.7 1 295 5. 3 1.9 

25 6 8 5.4 19-31.0 1 55- 8.11 * 1.8 6 339 19.3 4.10 96.2 

25 6 2q 48.4 1 c;- 11. 8 155-39.1 2.5 12 250 6.7 0.28 2.1 

25 1 2 15.8 19-16.7 155-22.31 .q.o* 1.2 1 335 3 3.56 82.4 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

197C HR MN SEC lATN LONG W DEPTH MAG NO GAP DMtN EP, T EP.H E

DEC 2'; 9 46 14.6 19-23.7 155-17.4 2.4 0.'5 1 1 74 1.2 0.1 5 0.4 O

25 10 35 30.4 19-22.4 155-20.11 2.1 o. q 1 301 6. 1 0.42 2.0 

25 10 59 23.0 19-1q.l 12.2 1.1 10 205 5.1 0.15 0.8 

25 14 16 35.4 19-20.8 155-13.2 11.8 1.0 5 tQZ 4.C' 0.0 

25 14 55 19.6 lq-22.9 155-20.41 0.2* O.R 7 305 6.1 0.48 1.5 

25 15 1 44.5 lQ-30.1 15'5-15.1 3.2* ('.8 1 335 q.1 0.33 1.8 

25 15 43 11.1 19-:- 26.1 151)-15.1 5.3 3.0 15 145 3. 2 0.11 0.9 C

25 16 48 20.0 19-18.4 1 55-25.81 8.0* 1.3 7 337 18. 2 2.34 53.6 

25 16 54 11.3 19- 22.9 155-1 1. 51 9.0* o. e 8 180 1.6 1.13 5.8 

25 18 3 57.4 19-23.9 155-17.5 3.5 0.5 1 221 1.5 0.1 3 0.9 C

25 18 4') 52.8 19-23.4 155-20.51 0.5* 0.9 1 305 5.1 0.13 2.3 25 19 I 49.3 19-24.3 1.3 0.8 9 qA 2.3 0.31 1.0 

V1 25 19 1 46.2 19- 25.9 155-15.q 5.6 2. 7 14 143 2. 7 0.10 0.8 C

0 25 19 12 3.6 19-25.1 155-15.9 3. 1 2.4 12 182 2.5 0.13 0.6 

25 19 28 45.5 19-23.4 155-1 7.61 0.1* 0.4 7 735 1.4 0.1 A 0.7 

25 20 46 16.0 1Q-22.0 15!'-20.1 3.2* 0.6 7 309 1.3 0.62 2.5 

25 23 22 1Q.'4 IG-22.8 155-20.6 3.4* ').9 7 306 6.4 C .2q 1.1 

26 1 31 51.G 19-23.6 155-11. 3 1.8 0.6 7 166 o.q 0.18 

26 1 3q 12. 1 19-26.2 155-11 • 3? A.0* 1.5 7 326 11. 7 2.32 20.4 

26 2 21 49.1 1q-18. 6 155-18.5 <1.4 1. (; 10 152 1. 1 0.1 3 0.9 0

26 3 1 41.5 19-23.3 lSt;-l 8. 2· 0.3* 0.6 7 258 2.5 0.29 1.0 

26 4 21 lC.7 19- 23. 7 155-17. 3 0.4 7 216 1.0 f).52 7.8 

26 5 42 47.0 19-23.8 155-11.41 0.3 7 215 1. 2 0.12 0.6 

26 6 43 32.9 19-? 3.5 155-20.2 3.2* O.A 8 302 5.3 0.83 3.1 

26 7 19 55.9 1<;-22.q 155-2 0.01 4.2 0.6 1 Zqq 5.6 0.49 4.8 28

26 7 5q 55.0 1q- 21 .0 155-53.81 3.5 2.C) 13 241 1 q. 0 0.65 6

26 8 '3 2q.1 1q- 2"3.1 155-}q.l 3.4 S3 281 4.0 0.28 1.7 4 

26 11 19 10.3 19-19.2 155- 7.0 q.8 1. • 1 9 ? 21 7.2 0.40 3.1 

26 11 29 lq.C; 19- 24.C 155-1 1. 31 4.4 '0. 1 8 123 1. 3 0.13 1.3 2

26 12 20 10.1 19- 22.5 15·1:;-1 q.11 0.4 * O.q 7 5.4 0.48 1 .5 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT LONG W DEPTH MAG Nt) GAP DMIN T ERH 

DEC 26 12 43 34.5 1q- 20.1 155-12. 5 11.8 1.1 10 198 5.8 0.29 1.5 

26 13 12 12.6 19- 22.5 15')- 2 3. 1 11.1 2.4 14 12 4.3 0.09 1.0 

13 15 57.3 1q- 21. q 155-14.81 8.0* 1.5 9 289 0.8 1.81 8.4 

26 13 18 30.8 19- 23. 2 ' 1 55-1 9 • 0 3.0 0.8 7 219 3.8 0.16 0.1 

26 14 20 1q-23.1 0.2* 0.4 1 278 3.A 0.31+ 1.1 

26 16 12 - 54.,0 1Q-24.0 155-16.q 2.8 0.4 1 151 1. 1 0.10 0.6 

26 17 23 6.6 19- 22.8 1';5-19.81 fJ.2 0.8 1 296 15. 3 0.11 5.2 

26 18 is J4.6 1q- 23.3 6.7 1.0 7 213 3.4 0.72 5.1 2

26 21 33 21.8 lq- 23.3 155-11.51 2.8* o. 3 1 231 1.2 0.46 l.q 

2"1 "3 6 25."1 19-18.1 155- 6.51 8.0· 7.0 15 215 9.4 0.11 6.3 

27 3 24 48.7 1<;-23.2 155-1q.7 2.8 0.6 7 295 4.8 0.12 0.4 

21 4 11 1.5 19-21.3 1'55- 2.4 18.1* 1 342 13. 1 0.36 2.q 

V1 21 5 39 1<;- 21. 5 155-12.61 4.0 1.0 8 1 76 4.8 0.60 2.2 

t-' 21 5 50 56.8 19-16.8 155-1 o. q 1.9 0.9 8 267 10.0 0.6.7 2.6 

21 1 43 34.5 19-23.8 155-11.2 2.0 12 q2 1.0 0.07 0.5 

27 12 1 2'7'.8 "19- 23.2 155-19.01 0.8 0.6 7 280 3.8 1.24 7.9 

21 12 156 54.8 19-20.0 1'55-22.51 8.0* 0.8 7 326 1,1.8 1.60 14.8 

27 13 1 30'.'4 2c\- 0.1 155-24.0 11.7 3. 3 16 218 25.2 0.12 1.5 

27 1,3 42 56.0 11- 21". 8 1 r; '5-11. 4 73.q 1.2 12 ' 90 2.9 0.34 1.2 

27 _15 48 42.7 1<1-18.6 155-15.2 14.9 0.9 7 203 4.8 0.11 0.9 

27 16 0 49.2 19-22.0 155-24.77 8.0* 1.6 !, '332 13.6 3.21 31.6 

21 11 15 43.6 19- 22.3 155-23.87 "3.0 1.3 7 329 11.9 2.63 39.0 1 

27 19 24 48.'2 19- 24.6 155-16.31 1.0 7 21A 1.3 1.01 5.1 

27 22 lq 31.3 19-37.6 1. 7.4 A.O· 2.3 11 301 28.6 0.85 5.5 

28 3 11 28.5 19-1 q. 8 155-17.e 8.1 1.1 12 131 0.9 0.10 0.7 

28 8 18 55.7 1q- 23.3 155-19.01 4.1 1. 1 7 219 3.7 0.61 4.4 

28 10 12 36.2 1q- 26. 5 155-17.41 8.0* 1.2 7 "3 2B 2.1 0.65 10.1 

28 12 0 59.6 19- 36.6 155- 4.31 8.6 5 A 335 31.0 5.07 0.0 

28 14 13 32. 1 1q-l A. q 155-12.6 11 .7 1.8 11 222 7.2 0.28 1.4 

28 14 15.2 19- 25.4 155-23.1 I. Q 11 125 5. 8 0.08 0.7 
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1910 HR MN SEC LAT N LONG W DEPTH NO GAP DMI N ERT ERH E

DEC 28 15 11 2.2 lq-21.6 155-'11.9 10.8 2.2 14 166 3.9 0.09 O.q 0

28 15 12 26.1 19-21.4 155-14.4 3.2* 1.6 8 311 6.4 O.B 2 3.3 

28 15 33 14.2 19- 20.5 155-11.2 12.2 1.1 10 210 3.8 0.26 1.2 

28 15 58 15.6 19-23.9 155-11.1 1 .6 0.4 7 154 1.1 0.09 0.3 C

28 16 32 57.6 1q- 30.6 155-10.37 8.0* 1. 8 q 302 15.8 0.96 14.7 

28 17 44 53.«"1 19-23.1 155-1 1.6 3.4 0.6 1 121 1.4 0.11 0.5 

28 18 11 25.9 1q- "30 __ 4 155-10.51 8.0* 2.4. 9 1 5.2 0.98 14.0 

28 18 29 39.2 19-23.8 155-11.11 2.7 0.4 1 233 1. 7 0.14 0.7 

28 18 59 31. 5 19-23.3 155-19.11 1.6 0.7 1 294 4.7 0.38 2.8 1

28 19 31 35.9 19-23.3 155-1 9. 2 3.4 0.6 1 283 3.8 0.50 2.0 

28 19 41 21.9 1q-Z2.3 155-22.31 4.4 1.4 1 321 9.5 1.06 18.4 1

78 lq 48 3q.2 19-23.1 155-20.41 1.5 1.0 1 305 5.9 0.56 4.5 1 

28 19 14.2 19-23.5 155-18.6 3.0 1.0 1 268 2.9 0.18 o.e 

VI

N 28 20 21 51.5 19-·21.9 155-21. 7 0.3* 1. 1 7 311 9.0 0.48 1.6 

28 21 30 150.q lq-23.4 0.3* 1.1 1 2 2.1:: 0.18 0.7 

28 21 59 18.6 1<;-23.4 155-18.2 1.5 0. 7 8 86 2.4 0.01 0.4 

22 20 41.2 19-23.8 155-17.1 2.R 1.4 1 121 1. 1 0.11 1.2 

28 23 1 13.1 1q- 23.6 155-1 8.4 0".2 1.3 7 149 2.5 0.21 0.5 

28 23 31 4q.4 lq..25.1 155-1 1. 5 2.0 2.5 13 127 0.6 0.10 0.7 0

2q 0 1 13.8 19-24.0 1';5-17.11 3.3 1.2 1 110 1.2 0.43 1.8 

2c; 2 B 12.7 lq-24.6 155-19.41 0.5 1. 1 9 105 3.4 1.26 4.5 2

29 4 58 32.9 19-26.8 1.3 1.2 7 5.2 1.06 6.0 7

ZG. 5 21 28.5 1q- 26. 9 155-15.61 5.4 1.6 1 306 4.4 0.64 8.4 

Zq 5 ·59 31.5 19- 20·.3 155-27. 5 8.0· 2.1 1 3'3Q 19.3 O.6Q 4.1 

2q 6 45 '34.0 19-29.5 155-11.91 8.0* 2.0 8 306 12.3 1.47 23.3 

29 6 57 49.0 19- 30.9 155- E.6? 8.0· ?5 7 '321 18.4 0.69 23.1 

29 1 1 59 29.4 19-26.9 5.4 1.2 1 255 4.0 0.16 1 .1 

29 15 20 3.A 1 C:;.- 23. r; 155-1 9. I? 2.7 0.6 7 2 A2 0.44 3.1 1 

29 18 1 25.q 1q-l q. 5 15')- q.l 8.9 1.3 9 202 4.8 o. 3.0 

29 19 8 52.2 19- 2 3.4 155-1Q.O 0.7 1 279 3.5 0.3"3 1.3 
SUMMARY OF SEISMIC EVENTS (CONTINUEDI

1 Q10 HR 'MN SEC

DEC 29 20 51 54.6

2q 20 Sq 31.9

30 0 21 31.q

30 2 7 37.8

30 2 8 14.8

LA T N LONG W

19-28.0 155-15.31

19- 2 4 • 8 1 55-1 1 • 1

155-1«;.51

19- 2 1 • 3 1 55-2 3 • 6

1 9- 25 • 2 1 55-2 3 • 6

DEPTH MAG

7.1 1.3

2.6 0.8

0.4* O. 8

11.1 1.4

3.2* 1.4

NO

10 215 6. 3

8 85 o. 3

7 290 4. 5

12 118 2.0

7 3 35 10.5

ERT

2.66

0.120.550.08

1.01

ERH

9.3

0.8

1.1

0.6

5.3

.

19-23.9 155-24.6 10.9 1.5

-19-,24,.0 3.6 1.0

9- 2"7,. 0 t 55- 1 2. 81 1 O. 1 * 1.,8

19--21.2 1-2.9 1.4

19- 24,.,0 J 7.,11 0.5 0".1

8.0* 1.6

0.-1

*

o.

0.4 0.5

12.6 O. 8

g.7 2.0

1.2 0.09 0.6

5 C • 4 2 2 .4

8'.,3 -2'.'28 15.'4

4. 5 0 • 4 6 '1 .4

·0".2·3 0'.8

7141 1.3

8 1 3sl 1-. 3

2,2 1. 7

10 203 12.3

10 '2'17 13.9

C

2

C

2

3.1

0.4

0.5

0.8

1.0

0.3

0.7

1.'3

0.10

0.27

0.20

0.2 5

0.30

o.? 5

0.1 5

0.11

0.13

5.9

1.

1. 1

'4.4

5.1

12 192

., 241

1 .3·14

6 190

8 140

8 318

8 121

8 129

11 181

14 1·21

0.5

1. 1

1.4

1. 8

1.4

0.9

10,.0

6 •.4

9.0

19-24.1 155-17.0

lQ-24.0 • • f

19--18.0 J55-,13.4

lC?-14 •.7155-21.3

19-2,3·.,9 155-17.3

3. q 15'5-1'7.2

1Q-2'O 4 1 1 3. 3

19-21,.5

30 3 7 3'1.4

30 4 2 q

6 20 16.8

,'3"0 " 8 ·3 6

'30 8 '40 7

30 9 18 23.1

30 13 22 52,.3

30 13 4. 3 6

13 52 3

30 14 16

i4 49 3

39 ,26 43 •.9

'3017 51

30 19 2"S 6

30 19 3'5 $4,.1

'.

3C 19 3 q 26 • '3 19- ?1 • 4 1 5'5- 1 5. 4?

30 20 16

30 21 44.C

302138' 1'5.3

30 22 10 46.5

1.5

4_1 1.J

1.3

9.q i.6

8 .9 1. 5

8 311 -;.3

8 ?,62 2.2

8 1 56 1.

15 11.8

8 31q 7.1

0.19 3.4

O.eso

0.31 ".9

0.12 0.9

0.81 5.4

2

4

30 31

30 22 35 34.8

30 22 46 21.2

31 0 42 34.9

31 1 59 15.2

c ,"

23.4 i 6_ 4

19-23.8 155-17.4

1<;-21.2 15·5-29.1-.

19- 21 • 2 1 55-1 5• 1

19-30.1 155-14.01

0.0

1.7 0.1

1.7

'i.g O.Q

8.0* 1.9

7 1 68 0.1

7 1 34 1. 3

1013310.3

A 309 4. 8

9 2RO 10.1

0.43

0.08

('.15

O.Q7

1.28

1.3

0.2

1.6

5.1

8.2

0

1
SUMMARY OF SEISMIC EVENTS (CONTINUED)

1-9'1-0 HR MN. SEC LAT N LONG W DEPTH MAG NO GAP DMIN ERT ERH E

DEC 31 2 5 1.8 19-24.1 155-1 1.4 l.q 0.7 7 121 1. 2 0.20 0.5 1

31 2 6 48.7 19-19.6 155-11.8 11.8 0.8 11 219 5.9 0.33 1.7 2

31 2 8 52.3 19- 20. 3 155-13.4 8.4 2.··2 16 181 4.2 0.15 1.1 0

31 3 30 34.2 19-24.1 155-11.0 J.3 0.2 8 148 1.3 0.19 0.6 2

31 3 35 14.3 19-23.8 155-16.1 It.q 1.0 9 1 q7 1..4 0.56 1.1 3

31 5 13 2q.6 19-26.6 155-16.l 6.8 1.1 8 300 3.4 '3.5 2

31 6 22 33.4 1 c;- 23.9 155-16. 81 0.0 0.4 8 160 1.r 0.18 0.1 11

31 6 36 33.4 19-20.1 155-13.1 8.8 1.4 16 117 4.4 0.1 ? 1.0 C

31 1 35 30.4 19-24.4 155-17.0 2.2 0.5 8 145 1.0 0.33 0.8 -

31 q 21 29.0 20.2 7.0 11 ..2 22 It.r 0.31 1.1 

31 10 11 56.8 19-20.4 155-10.9 7.2 10 220 3.7 0.13 l.q 

31 12 8 58.2 155-22. 8 33.7 14 224 It.6 0.57 2.1 5

U1 31 12 33 15.1 19-20.6 155-1 8.q 11 1 79 3.1 0.23· 1.7 

31 13 25 35.'5 19-25.1 155-17. 3 1.6 6 176 0.1 1.54 2.4 

31 13 26 3.5 19-28.5 155-11.61 8.0* 6 320 5.7 0.45 44.6 

31 18 ';0 24.q 19- 2 3.q 155-17.11 3.2 1.7 12 101 1.0 0.05 0.4 C

31 19 8 38.1 19-23.6 155-1 7.41 3.6 0.9 9 q7 1. 1 0.10 0.5 0

31 19 50 13.'5 1q-25.2 155-15.8 4.4 1.0 9 201 2.1 0.21 0.8 

31 22 0 25.2 lCf-18.7 155-15.9 9.0 2.1 17 190 0.12 o.q C

31 22 51 0.7 19-21.0 155-24.5 8.6 1.8 15 111 2.5 0.13 1.0 c

31 23 53 IC.5 19-24.4 155-17. ?2 1.2 9 1 01 1.0 o.C'6 {'\.3 C
Table 4.--Fe1t Earthquakes

Greenwich Civil

Time

Date H M S Magnitude Location 'of Felt Report

Oct 6 20 17 58.89 2.98 Kapapa1a Ranch

8 06 13 04.52 3.28 Hi10

13 08 40 01.00 3.25 Kapapala Ranch

25 08 32 52.84 4.17 Hilo t Kealakekua

25 09 55 27.98 4.85 Islands of Maui, Molokai,

Hawaii

29 07 47 30.56 3.96 Kamuela, Kula (Island of

Maui)

30 18 50 57.44 3.21 Hilo ,.

Nov 3 07 57 45.13 2.84 Kapapala Ranch

11 17 12 41.4~ 3.70 Kapapa1a Ranch

12 19 46 13.77 4.34 Northern half of Island

12 19 57 19.13 3.18 Kamuela

12 21 36 00.27 3.23 Kamuela

16 04 02 '51,.58 3.34 Ke~au, Hi10

18 06 07 57.79 3.37 Kamuela

Dec 4 16 35 58.82 2.08 Kapapala Ranch

4 16 45 31.09 3.26 Kapapala Ranch

4 16 50 43.87 2.50 Kapapala Ranch

4 21 50 40.13 3.25 Kapapala Ranch

5 01 32 26.05 2.81 Kapapala Ranch

5 17 59 45.12 3.96 Hilo, Volcano, Kealakekua

10 20 ,·28 05.91 3.63 Hi10, Kapapala Ranch '4.

13 08 02 06.36 3.61 Kealakekua! Kailua

20 20 44 16.83 2.97 Paauilo '.

25 15 43 11.10 3.. 03 Hawaii National Park

25 19 07 46.20 2.71 Hawaii National Park '.

25 19 12 . 03.64 2.48 Hawaii' National Park

26 13 12 12.57 2.43 Hawaii National Park

28 23 31 49.43 2.53 Hawaii National Park

"

55
OCT DEC

+

·1934.0

.....

<.J'1

01

W

o

+ 19 3q.O

+

+ .+

.......

U1

U1

(j)

o -- - ....

x

.

- .-.•. •• • I •••-. I

x*

. +

MaQnitude

Symbol Interval

• ...... 4.0 < M 5.0 U1

+ X 3.0 <: M 4.0 U1

+ + 2.0 < M til- 3.0 en

M 2.0 0

0 5 Km.

--- 19 10 .0

.

. .' fI\..~ ", • I

--:'r.' .'.• • , • •... •" . I.. I

. . .,' l!i. I L·a_ . · · .'. :rrA,'" • 1.·1· I ••••• .. +

.: '. ...' . . .+ -t4 . '~ · t:- r..... ~.. · J::".+.' 1.+.0 Q)t:a . *

;K • • .... e~~ • .. . ... .. . .... + • • :...to It" • .~. •• • •+ • • +' + +"! ·'111.' .....1. • • I

~+'. • : ~. ........ : . · .; .•J=s ;t+ .. : I'"

• .. AI' .'

+ =..~: • OW' + ! .. ...... • .lad....-to "": .~I.-:

'.

+. : ..,*.,.. ··x . , ... , ++ ....... . ...... +. t ... . t I e. ..-'

+

+ . .. . .. .. 6 +. +

.t

+ +

*.. . +

+ +

..

. +

......

U"I it-

(J1

W

0

+

0 +

9 10 .0-

Figure 4.--Plot of epicenters in the Kilauea region. Triangles are

seismometer locations. Kilauea Caldera and the major pit craters

on the east rift are shown in outline. The Pacific Ocean lies in

the lower right portion of the illustration.

56
10. l0r--_-.... -.....__-...-__......- .-_--.,r---_~---___.__--.O_I

10'

c

o

a

u

;.

-c:

aa

2 10.

I

Frequency (Hz)

10 100

Figure 5.--Response curve for System II, EV-17, Teledyne seismic

preamplifier.

57
c

?

c: c: c:: c: L1

0 0 0 0

v· C/) V) tI' tI' V)

L s.. '- '- lI~'

~.' >. > Cl.: a.; Q) ~: Co <1' '- L ,:: -0 'T:\- 1-

,.:. r~ r:: c c c: c C,

U.' L. < e:t < <'"

c·: 0 C I I , I C·

'Ct CoL -c: "\:1 '"t) C' ,.... ,- C 0 0 C I C;, , 0 -~ 9 (; Li

.. f-.- -,.

L..'"'

U.

C'

c· C' C)

l':':) -~ c.. r-'''', c', '" r-t C"'J .....

r:'

~.J

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C',~

.::1''::-

-' C" ",~ ~:

<:~'. a • (.j C" M .......

.: l:) CO; t".. tr\

it a • L""\ If) L1"' ......

~.; "'" ,.....,.,.. c' Lr-:

f) • " a • <-." .-1 Lrt t-f Lr\ (J.)

y-. -=- -~

""' c> c::: C' ~,.j r-,.; " co:- ,..",' "1'" Lr'.' " cj c~

• ~ ~ • • a • * • t:,") ............... rl .-t C ,..... 0 C' C 0 .-.. f""""t

L:..J

0.., t" '"'" f'-" ,..... fV"1 r-t ,.r, ,...: r-~ I't"'\ r-C ,.."" "" r-t ,.r, """ >

J-

> C'_", 00 L~ C" l~ f'. C"I .::t a C.·~ c- Lon ...,-J Lr\ e~:: ll' 0"; Lr'I

UJ ,...., t'" .-t c· cr~ <:::' ti" ("J r-~ 0':' r-i 1". r-' ,.~ r-4 C.~~' ro·. ...J C') 0 C-j 0 "" ........ m C'J ...... c· -=t C:'l r-f 0 C'J C'''' .-;

W~~ ~~ N~ ~~

0 C::: C-:: 0 0 C" L" LJ) Lf'. L.J Co C C c' {~ c

C'l m C..... ('.J (',J .:j" 0 0 C '"' -et _-t _"1'" ..::t .:::t

Ci 0 ,.... Lt"'\ L,.""\ U"'\ N C·'·J C"J C"-J C'J C'J

(".J N ~,! r-t N ....... r-f r-f r-4

c:

COO C1 0 ,.t"', C. c\ c:: c C' C· Lr, C .:: c· L': C'

:~ " ,.~ cr-; L"'t' tC O'~; ,....-.\ ,....~ e;:: c; C" .::i l~ Lf",

,. it (j " a :a II a .~ • » • • a 3

C' L~ en .:t '"' r-.. ...."'\ c:.~ C"") " c: r.f'\ (,J

=::" ..... <:"'-1 f"""'4 N M ,.~, r-I Lf"'; Lr, C"'oJ ('·1 ..-4 .....j Lf'\ ,-1 M

o

..J Lr\ Ln L'" Lr\ Ll'\ Ln ~. Lr\ -= U"\ LJ I Lf'\ .:j- Lr.

l~ Ln L.n Ln Ln L!'I Ln l.f'\ Lri Ln LJ"\ Ln L,,,, Ul L" Lf' Lf"\

~~~~~r-I~~~~~~~~~~~~

C' 0 Cl 0 C.) C c~· c:., C' C~ c' C' c. c: C':',; C t:':"

C oj c:':' c,' 1'''\ tI"\ ,.,...: c:' ,.-\ f"". ,..~ rn (~ c.D (..;' f",;."" t,!;. ld

3 ~ ~ a a * e a a a • ~'L"" Lr\ Lr. Ln Lr. N U'"\ L"" U"'\ ...... ,..... ,..... ,...... ,-....

..... .-f ..:t- L" L'" LI"\ M r-i ,.-..l ,..~ r-! r-f

lO c.~ lC Ln tn Lf'\ l./'\ l.'1 L" l.tl oc ... l.'" U""\ LJ"'I L""\

~~~~~~~~~~~~~~~~~

....-i r-I r-t ,..... .-c r-4 r-I r-t .-i rl r-f r-; ..... rl r-4 r-~ r-f

(/''J

c..~ c e C1 C· c:: c C:') c.:, r,:-:;, c.-:- c. C'l c· c;:; C'j C'

C:'-.' ('~ COl ("',J ('j Ncr,' (',1 ('1 N -""t .~ ..::t .::t _-:t' .::~ _-f'

a fl. ~:j ~. ~. at a ijt:it:il

L") '..0 W f-I'. r-r- "" .....1 r-f ...... r-i t1". U'" L."'. l,~ L'"\ tr. tn -~ .=:t .~ --:r _~ -".:t ~,,, ,.,\ r~ J r·1 ("J C" C".J (,•. J (""J

U') ('~ r':' ~-:::. C'l C'" CO c: C"I c:" M C., C'I (.~ c-'l c;")

=r- J N ("'.J r--4 M ,.....l ('...; r--i r-i ('oJ r-' r-i ....... 1 \""',! M

a.

<! --I W Z -J Ll-' =.: := UJ ::.: 0- LU ~'J LJJ

<t < <.:: - - - < --I -.J --J - (/) (,1).

C :c =:r: :: == _- ~.~ ~-! ~~ ~~ :J :::") I~

- c...., t..J l.LJ Z

N ~j Z L!j lJ..1 LU

:"-1 f"J 1..1.: n.. 0- a.. <:. <: <

::) -~ -. <~ <'.: C~.!-f _.. -c <:: <.c ~:L ~'.' ' / :Z~ =.~ Z .....:.. .: . Z

c:.( LJ....' L:. lJJ =) -....

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1.:.... r.": '-:'. ~: ... < ~: «'7'. ...J --' _. -J < ~:.,;~ .. ~L. ~/

< <: c.: C- u.: LL l.!..; W".1 U.I oIC. _

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5 ... ~:f~ , , ~~ :J ::1 :':) ::')

C/)

-J i'J LJ.J Z

<1:

L·

- <~ <" <' I--;~--' a.. ",~ C', c~ :..:: (/')

c· ~.!. ~~ ,.. J U.! :::

~~~~~

UJ LJJ LL..J c.' CJ (::> -' -J -J -J -I -I

«<-- -.- ..•.. --- ...,..... .,.. ..... .'.,. ..... .... _...... ~.. ...; ....

c·~ 0 C ,..... L.." ~~, 0 C) Co:- C,·: c.'? C. ,..... CO'; C Lr\ C

'" ('...; r-! 00 C'i ~. r'-4 ,..... _7 cd c..-:1 c.":.~ 0" ,.."'; :~ t·...

• $ , a a _ a a. • a _ a 8 a 0

I (".J """ 0 (,·l C' .....-. _-1" c--:: 0':" C., ,.... (,J ..::r tt'. 0:: C'f .-1'

I- C'.J N N (,,-.J .:t r-f r~ C"'J (,,·f ('"'I C'.J N (,'J (0-1 r-.J t:'": ("'I C'J

«

...J r.:'i 0'" c..... m C', (!) m C) C"" CI ,......, .-~ r-: .-i ,,-t r·-i ~-t ....., r-i ,...., r-l .......; ..... ,..-: r-l r-~ r-'

~.' (:") <1.

-.J - U' X -J -!

< ~~ 2 =~ ~:~ LLJ < <: ~: -'. c.r c r

' <! - ..... <, =.:

< c:r :.1: a.. Z C~....: c C' =. - =, ::J .-. "- IJ,.i a 0 -J <. ") -J ..J :.~: 0.. Z --J -

o c... ... '. ~.:: c.. <: < 0.. r- c ::: c_ '=:'.~ ::: ~~ ~.~ C"~ ~. ff'! 0::: L: =. = .... <LWIJ........ LLJ-=·='<~LJ,.Jz:-:~<t~~" I- ~~~ :; Z u' (l) ....J --I :!: 0.. > ':';- =' = cr. J- =:-. t~

t- :r c.-) L!..~ <: <:r.'. - <: - <.:. 0 c.t C:1: 0 -. -, -"')

t.ll C::. U CJ LI..J :r: :r: ~! _.I -' :-:',: .' ~~ :;:-~ (=) n~ ~:

LU ';:L U" a a.. ::..' :;:: u. cr 0 >< c.::: ...... ...J a :: ...- C~~w~~~=~<o~~~~~==~

o < U CJ LLJ =:. ::~ _J -oJ :.:: :: z C) a. c..

u

til

C

o

:58
1. SEISMOMETERS

EV-17

EV-17H

HS-IO

HVo-2

2. SEISMOGRAPHS

HVO-l

Table 6.--Seismic instrumentation

Electrotech EV-17 1.0 sec period moving magnet vertical

component seismometer.

Same as above, but horizontal component •.

Hall-Sears 0.5 sec period moving coil seismometer.

0.8 sec period moving coil seismometer.

Vertical-component electromagnetic seismograph with a

peak magnification of about 20,000 at 0.25 sec period.

15-90 Press Ewing System: 3-component long-period seismograph system

with peneulum and galvanometer periods of 15 and 90 sec,

respect iv"ely •

EV-17/3.5 cps galv, EV-l7H/3.5 cps galv, etc: Short-period electromagnetic seismographs composed of the seismometers and

galvanometers indicated. Response similar to HVO-l.

Pooriy calibrated.

3. AMPLIFIER AND SIGNAL TRANSMISSION SYSTEMS

System I HVQ-built solid-state seismic preamplifier (voltage gain,

"200x), direct-signal trallsmission over "hard" wire to HVO,

HVO-built solid-state amplifier and galvanometer driver.

System II Develco or Teledyne seismic preamplifier--voltage-controlled oscillator, signal transmission on audio FM

carrier o'ver "hard" wire or fm radio link to HVO,

discriminator.

Geotech PTA Short-period Geotech photo-tube amplifier.

4. TIMING SYSTEMS

~USGS Crystal-controlled chronometer employing solid-state

binary dividers to produce minute and hour marks. Typical

drift rates are'~ few milliseconds per day.

TS-IOO Sprengnether crystal-controlled chronometer. Output and

performance characteristics similar to RM-USGS.

5.' TELEMETERED SYSTEM RESPONSE

The peak magnification of the standard telemetered systems (System II,

with the film strip magnified 20 times for viewing) is about 2 x 105

at a period of 0.1 sec. For periods between 0.1 and about 1.0 sec,

the response falls off 6 db/octave (Fig. 5).

59
TILTING OF THE GROUND AROUND KILAUEA CALDERA

Tilting of the ground around the summit of Kilauea is monitored

daily by a short-base water-tube tiltmeter in the Uwekahuna Vault, and

at irregular intervals it is measured on a regional scale by means of

a network of field tilt bases an~ a portable water-tube tiltmeter. The

attitude of the ground surface at each tilt base is reported in terms of

north-south and east-west tilt coordinates. Both coordinates at each

station were arbitrarily set equal to 500 when measurements at that

station were begun. Increasing tilt coordinates correspond to northward

and eastward tilting of the earth's surface; that is, to a relative

subsidence toward the north and east. A one-unit change in coordinate

corresponds to a tilting of 1 microradian (1 mm per km) in the direction

indicated.

Due to errors in our earlier summaries, a complete and corrected

list of tilt coordinates for all tilt stations is listed in Table 9.

This list excludes the three pot readings which were taken at Ahua

Kamokuko1au, Tree Molds, Sandspit, and Keamoku, but it includes the

two pot readings which were not previously published for all stations.

Essential data on each tiltmeter station are listed in the first

quarter issue of each year.

Table 7.--Tilt Coordinates at Uwekahuna Vault,

October, November, and December 1970

Date N-S E-W Date N-S E-W

Oct. 4 560 366 Dec. 6 554 365

11 560 366 13 552 365

18 560 368 20 551 362

25 560 3~3 27 549 356

Nov. 1 561 361

8 559 363

15 560 363

22 560 361

29 558 363

60
0\

Table 8.--Ti1t coordinates' and changes at bases around Kilauea Caldera (See fig. 7).

-6

. 11 Rate (10 rad/mo)

" Tilt Coordinates - and Direction of

Date Tilting Since Date o

Tilt Base (1971) N-S E-W Last Reading Readin

Uwekahuna (U. on fig.' 7) 25 Jan 616.5 393.5 3.88 N67.6°W 

Tree Molds (TM) 25 Jan 535.5 478.6 1.99 N19.8°W 

," ...

Sand Spit (SS) 26 Jan 1031.6 606.8 3.99 S16.SoW 

Mehana (M) 25 Jan 594.8 591.4 1.25 N27.9°E 

Keamoku .(Kea) ,. 2 Feb 568.8 441.7 3.60 S 2.6°W 

Ahua Kamokukolau .(Kam) 26 Jan 494.5 502.5 1.79 SS9.0oW 

Kipuka Nene (KN) 3 Feb 288.6 502.1 0.53 . N20. 6°E 

Hilina Pali (HP) 3 Feb 456.8 497.1 0.43 ' N 9.SoW 

Kapapala Ranch (Kap) 2 Feb 486.3 521.8 0.67 .. N72.loE 

Due to several errors in the tilt coordinates columns in the earlier summaries, a co

corrected list, of tilt coordinates for all tilt bases is provided in table 9.
Kap

.,;AI'"

2000~ TILTING RATE 1.0 X 10-6 RADIANS/MONTH

5 K M

cr

o

Figure 6.-~Tilting of the ground around Kilauea Caldera. The vector

depicting tilting at a given tilt base points in the direction of

maximum relative subsidence, and its length is proportional to the

rate of tilting during the measurement interval. Closed circles

represent field tilt bases; open circles, short-base watertube

tiltmeters. See Table 8 for explanation of abbreviations.

62
Table 9.--Comp1ete and corrected tilt coordinates at all tilt bases around

Kilauea Caldera

Tilt Base and Tilt Tilt Base and Tilt

Coordinates Coordinates Location Date N-S ;

E-W Location Date N-S E-W

Uwekahuna 22 Nov 57 500.0 500.0 Uwekahuna 13 Sep 66 499.2 520.4

19°25.5'N 6 Feb 58 508.3 492.8 (cont'd) 8 Dec 66 506.5 507.8 155°~7.4'W 22 M.ay 58 518.1 487.6 17 Jan 67 512.5 499.1

4 Aug 58 526.8 483.4 14 Feb 67 521.7 499.4

2 Oct 58 533.6 479.9 2 Mar 67 521.5 502.6

2 Feb 59 543.9 467.8 8 May 67 544.6 497.3

27 Apr 59 544.2 469.1 5 Jun 67 552.2 494.8

13 Aug 59 543.3 472.4 6 Sep 67 568.6 487.7

12 Oct 59 546.8 468.8 8 Nov 67 583.0 478.0

10 Nov 59 552.8 461.2 13 Feb 68 583.3 469.1

1 Dec 59 535.6 464.2 11 Jun 68 598.7 437.5

28 Dec 59 570.5 443.8 28 Aug 68 557.5 474.1

20 Jan 60 557.8 458.4 3 Dec 68 543.4 472.9

28 Mar 60 272.0 716.2 6 Feb 69 566.1 455.1

5 Jul 60 218.9 759.8 19 Aug 69 572.8 452.5

16 Sep 60 216.2 758.8 29 Sep 69 572.1 451.6

29 Nov 60 283.6 690.0 3 Dec 69 576.4 444.9

23 Feb 61 374.6 628.2 27 Feb 70 591.3 429.1

8 May 61 444.1 594.6 22 May 70 604.9 416.3

26 Jun 61 468.0 583.4 9 Sep 70 609.7 410.0

22 Jul 61 476.8 572.4 25 Jan 71 616.5 393.5

22 Sep. 61 404.4 626.8

6 Oct 61 358.9 645.6

2 Jan 62 394.1 611.5 Ka1ihipaa 26 May 58 500.0 500.0

27 Mar 62 409.2 601.7 19°21.4'N 6 Oct 58 498.9 500.7

29 Jun 62 422.2 590.5 155°15.3'W 9 Feb 59 496.0 503.3

30 Oct 62 446.9 576.8 28 Apr 59 487.3 502.4

10 Dec 62 437.3 580.1 14 Aug 59 488.6 501.0

20 Mar 63 471.2 561.7 13 Oct 59 488.6 500.7

10 May 63 471.6 575.1 29 Oct 59 489.3 500.8

6 Jul 63 478.6 568.7 12 Nov 59 487.1 501.7

6 Aug 63 486.8 561.0 2 Dec '59 486.8 501.8

10 Oct 63 420.8 608.0 29 Dec 59 471.4 509.0

22 Jan 64 440.6 583.6 19 Jan 60 4·17.2 511.0

29 Apr 64 452.5 572.4 4 Feb 60 508.2 504.3

27 Aug 64 469.6 557.7 29 Mar 60 563.4 447.7

10 Dec 64 488.4 455.6 7 Ju1 60 599.2 416.5

4 Jan 65 500.3 534.8 26 Sep 60 611.8 408.7

17 Jan 65 507.6 533.8 3 Nov 60 605.2 407.2

6 Mar 65 441.0 584.5 24 Feb 61 579.9 414.2

15 Jun 65 454.4 568.5 11 May 61 549.1 427.5

7 Sep 65 467.3 556.4 2.6 Jun 61 541.5 433.9

27 Dec 65 442.5 575.8 22 Ju1 61 540.5 435.9

10 Feb 66 463.9 555.2 22 Sep '61 562.5 431.4

14 Mar 66 470.6 549.7 . 8 Oct 61 580.5 421.3

7 Jun 66 486.2 535.5 5 Jan 62 577.5 422.3

63
Table 9.--Complete and corrected tilt coordinates at all tilt bases around

Kilauea Caldera (cont'd)

Tilt Tilt

Tilt Base and Coordinates Tilt Base and Coordinates

Location Date N-S E-W Location Date N-S E-W

Kal1hipaa ~8 Mar 62 577.3 422.0 Tree Molds 20 Jan 60 506.2 493.0

(cont'd) 5 Jul 62 577.3 422.2 (cont'd) 5 Feb 60 408.8 528.9

26 Oct 62 568.6 427.0 29 Mar 60 334.0 550.2

II Dec 62 569.6 423.7 7 Jul 60 305.8 555.9

18 Mar 63 562.7 428.2 23 Sep 60 308.0 552.8

tll May 63 553.7 451.0 31 Oct 60 342.5 538.4

3 Ju1 63 343.4 387.5 26 Feb 61 408.5 517.4

5 Aug 63 330.4 377.7 9 May 61 438.3 512.1

22 Aug 63 338.8 377.1 27 Jun 61 450.2 510.6

7 Oct 63 358.1 375.1 25 Ju1 61 455.3 509.1

~O Jan 64 362.8 373.6 7 Oct 61 389.5 528.5

6 Feb 64 361.9 373.2 4 Jan 62 412.9 519.3

27 Apr 64 360.6 371.4 27 Mar 62 420.5 517.4

27 Aug 64 352.6 372.6 29 Jun 62 427.1 514.6

8 Dec 64 342.4 376.1 31 Oct 62 438.5 512.7

21 Jan 65 340.2 380.2 12 Dec 62 435.8 512.4

6 Mar 65 365.6 380.1 19 Mar 63 448.7 510.9

8 Jun 65 366.9 375.3 14 May 63 453.5 512.2

31 Aug 65 360.9 373.8 7 Jul 63 452.5 512.7

~his station was lost 6 Aug 63 457.0 50'9.8

during the eruption and 23 Aug 63 457.9 509.8

earthquake of Dec 24-31 9 Oct 63 422.6 521.3

1965 21 Jan 64 436.2 514.0

1 May 64 443.1 511.6

28 Aug 64 450.9 508.8

Summer Camp 9 'Jun 58 500.0 500.0 7 Dec 64 461.6 504.1

19°24.6'N 7 Oct 58 505.6 515.0 17 Jan 65 469.3 504.3

155°15.6'W 8 Feb 59 508.4 527.1 6 Mar 65 435.1 517.3

4 May 59 517.6 527.9 9 Jun 65 443.2 511.4

15 Aug 59 517.6 525.1 2 Sep 65 447.1 508.6

16 Oct 59 519.7 529.5 29 Dec 65 437.9 515.4

13 Nov 59 530.9 538.6 16 Mar 66 453.8 506.9

This station was lost 8 Jun 66 462.9 504.8

during the eruption of 12 Sep 66 469.8 500.2

Kilauea Iki Nov 14,1959 8 Dec 66 477.9 495.6

18 Jan 67 480.8 495.2

13 Feb 67 483.7 495.8

Tree Molds 9 Oct 58 500.0 500.0 1 May 67 491.9 495.4

19°26.3'N 5 Feb 59 508.6 498.9 7 Jun 67 496.4 495.7

155°17 .3 '.W 28 Apr 59 502.1 498.7 19 Ju1 67 501.0 494.1

14 Aug 59 499.7 498.5 7 Sep 67 504.4 494.5

13 Oct 59 501.5 498.1 30 Oct 67 513.6 492.4

12 Nov 59 509.5 496.4 7 Nov 67 507.5 495.7

2 Dec 59 504.6 490.0 5 Dec 67 510.0 493.2

28 Dec 59 516.1 488.1 21 Feb 68 513.8 491.8

I I I I

64
Table 9.--Comp1ete and corrected tilt coordinates at all tilt bases around

Kilauea Caldera (cont'd)

Tilt Tilt

Tilt Base and Coordinates Tilt Base and Coordinates

Location Date N-S E-W Location Date N-S E-W

Tree Molds 10 Jun 68 522.0 491.3 Sand Spit 11 Dec 64 905.9 697.5

(cont'd) 10· Oct 68 477.0 502.9 (cant'd) 19 Jan 65 934.7 732.7

3 Dec 68 493.4 495.1 8 Mar 65 893.9 749.9

6 Feb 69 504.9 494.2 16 Jun 65 884.9 747.7

24 Feb 69 484.3 499.9 7 Sep 65 881.6 737.5

1 May 69 508.3 491.5 30 Dec 65 869.0 751.8

27 May 69 501.3 493.3 17 Mar 66 845.0 747.9

30 Oct 69 506.4 490.3 8 Jun ·66 839.9 734.9

9 Feb 70 518.4 485.5 12 Sep 66 835.1 716.8

18. May 70 523.6 485.3 5 Dec 66 831.0 710.6

9 Sep 70 526.9 481.7 17 Jan 67 848.8 687.3

25 Jan 71 535.5 478.6 7 Feb 67 863.2 684.3

12 Feb 68 875.8 703.1

Sand Spit 31 Oct 58 500.0 500.0 1 Mar 67 877.6 709.5

19°24.l'N 8 Feb 59 505.1 493.7 20 Mar 67 881.2 712.7

l55°16.8'W 4 May 59 531.2 482.8 12 Apr 67 892.0 717.2

15 Aug 59 527.4 485.8 8 May 67 907.0 718.7

16 Oct 59 525.3 483.6 13 Sep 67 942.4 706.6

13 Nov 59 527.5 472.9 12 Jun 68 955.1 650.7

4 Dec 59 545.0 468.9 31 Oct 69 951.0 684.8

31 Dec 59 605.9 466.7 2-0 May 70 1050.1 613.0

22 Jan 60 605.0 481.1 10 Sep 70 1049.2 612.0

5 Feb 60 599.2 580.1 26 Jan 71 1031.6 606.8

4 Apr 60 757.8 703.9

14 Jul 60 794.0 735.6 Keamoku 2 Mar 59 500.0 500.0

23 Sep 60 786.3 743.1 19°25.1'N 12 May 69 512.8 498.6

31 Oct 60 774.8 724.3 155°19.0'W 16 Aug 59 516.1 497.6

26 Feb 61 854.5 700.9 20 Oct 59 515.5 493.4

10 May 61 962.0 687.0 4 Dec 59 504.9 496.7

28 Jun 61 993.1 672.7 31 Dec 59 534.8 469.8

25 Jul 61 974.8 658.8 21 Jan 60 530.6 484.2

11 Oct 61 839.2 695.2 4 Feb 60 483.3 608.1

9 ·Jan 62 844.6 692.5 30 Mar 60 425.0 739.1

29 Mar 62 849.4 700.9 12 Ju1 60 396.1 792.1

29 Jun 62 852.5 705.9 22 Sep 60 385.1 799.3

1 Nov 62 895.4 706.7 1 Nov 60 384.1 768.7

12 Dec 62 891.7 701.5 24 Feb 61 429.1 664.5

21 Mar 63 938.8 706.4 9 May 61 492.4 597.0

14 May 63 930.2 708.8 24 Jun 61 511.3 572.1

6 Ju1 63 924.6 724.4 21 Jul 61 513.3 567.5

12 Aug 63 921.7 726.2 8 Oct 61 443.3 677.9

11 Oc.t 63 882.8 748.1 5 Jan 62 447.1 651.1

24 Jan 64 863.1: 751.8 29 Mar 62 453.9 637.7

1 May 64 861.2 748.6 30 Jun 62 466.2 623.4

1 Sep 64 885.3 723.0 31 Oct 62 481.4 598.5

65
Table 9.--Complete and corrected tilt coordinates at all tilt bases around

Kilauea Caldera (cont'd)

8

o

5

o

6

o

4

4

4

8

5

1

1

1

6

6

Tilt Tilt

Tilt Base and Coordinates Tilt Base and Coordinates

Location Date N-S E-W Location Date N-S E-W

Keamoku 11 Dec 62 474.5 605.6 Ahua 3 Dec 59 479.1 500.7

(cont'd) 18 Mar 63 494.7 577.8 Kamokuko1au 30 Dec 59 413.9 535.4

10 Mar 63 519.2 564.3 (cont'd) 22 Jan 60 444.7 543.5

4 Ju1 63 531.4 552.6 5 Feb 60 634.0 494.3

12 Aug 63 537.0 544.9 5 Apr 60 817.2 456.7

7 Oct 63 501.7 598.4 29 Apr 60 839.5 452.1

24 Jan 64 492.4 591.9 8 Ju1 60 899.5 441.4

28 Apr 64 495.9 584.4 24 Sep 60 927.8 433.7

26 Aug 64 505.7 569.8 28 Nov 60 883.2 441.2

11 Dec 64 506.2 556.1 25 Feb 61 722.6 478.7

18 Jan 65 527.1 531.7 10 May 61 588.7 530.2

7 Mar 65 498.1 589.8 24 Jun 61 546.4 543.5

7 Jun 65 499.8 583.0 21 Ju1 61 547.4 542.8

30 Aug 65 502.5 571.6 7 Oct 61 769.6 469.2

28 Dec 65 505.7 574.2 3 Jan 62 733.9 488.8

15 Mar 66 512.7 555.6 28 Mar 62 717.8 499.4

6 Jun 66 516.8 544.5 1 Jul 62 704.9 509.2

6 Sep 66 518.9 532.4 26 Oct 62 652.9 521.

6 Dec 66 510.8 528.5 10 Dec 62 658.3 521.

13 Feb 67 525.1 509.5 19 Mar 63 599.6 539.

2 Mar 67 531.4 509.2 10 May 63 608.1 583.

21 Mar 67 535.5 503.6 3 Jul 63 694.9 548.

2 May 67 555.0 488.7 5 Aug 63 701.9 555.

6 Jun 67 562.9 479.5 10 Oct 63 802.0 52-9.

19 Ju1 67 572.3 469.2 22 Jan 64 798.9 536.4

5 Sep 67 578.3 463.7 1 May 64 788.1 532.2

30 Oct 67 590.1 440.6 26 Aug 64 752.1 528.4

8 Nov 67 586.6 446.8 10 Dec 64 708.4 522.7

21 Nov 67 585.1 448.4 18 Jan 65 677.0 554.4

30 Nov 67 574.3 452.6 6 Mar 65 777.6 542.9

13 Jun 68 582.1 442.4 15 Jun 65 789.4 532.7

19 Jun 68 583.1 441.1 30 Aug 65 774.3 525.7

2 Sep 68. 571.5 471.0 28 Dec 65 830.0 531~

10 Oct 68 551.4 503.2 16 Mar 66 800.8 529.

2 Dec 68 548.4 492.2 8 Jun 66 778.8 519.

6 Feb 69 558.8 473.6 8 Sep 66 753.1 514.

25 Feb 69 546.9 498.5 5 Dec 66 738.8 501.7

27 Oct 69 571.3 468.3 18 Jan 67 706.6 497.

11 Feb 70 573.7 454.9 7 Feb 67 688.6 501.3

20 May 70 585.2 447.4 12 Feb 67 681.9 518.

10 Sep 70 586.3 442.5 1 Mar 67 684.0 526.5

2 Feb 71 568.8 441.7 20 Mar 67 675.5 533.6

1 May 67 646.2 550.2

Ahua 4 Mar 59 500.0 500.0 5 Jun 67 622.7 554.

Kamoku.kolau 5 May 59 489.1 506.3 18 Jul 67 603.0 557.

19°ww.1'N 16 Aug 59 493.9 506.0 13 Sep 67 587.7 558.

155°16.6'W 19 Oct 59 488.6 505.7 7 Feb 69 630.6 539.7

66
Table 9.--Complete and corrected tilt coordinates at all tilt bases around

Kilauea Caldera (cont'd)

Tilt Tilt

Tilt Base and Coordinates Tilt Base and Coordinates

Location Date N-S E-W Location Date N-S E-W

Ahua 18 Feb 69 625.8 542.5 Kip.uka Nene 22 Nov 60 526.9 485.4

Kamokukolau 22 Feb 69 643.3 542.2 (cont'd) 27 Feb 61 521.3 488.0

(cent'd) 23 Feb 69 656.1 536.5 11 May 61 513.6 493.2

27 Feb 69 665.3 535.6 27 Jun 61 510.6 498.3

31 Oct 69 614.6 540.5 24 Jul 61 509.6 499.1

21 May 70 495.5 510.3 9 Oct 61 516.7 494.4

11 Sep 70 498.7 509.5 4 Jan 62 517.1 493.4

26 Jan 71 494.5 502.5 5' Apr 62 516.8 493.5

2 Oct 62 515.1 494.1

Hilina Pali 19 Jan 60 500.0 500.0 13 Dec 62 511.8 495.2

19°18.2'N 6 Feb 60 504.6 497.1 15 Mar 63 509.5 495.5

155°18.6'W 4 Apr 60 516.0 490.5 13 May 63 500.4 502.5

11 Ju1 60 522.7 484.9 5 Jul 63 489.3 505.7

20 Sep 60 525.7 483.3 9 Aug 63 487.3 505.9

21 Nov 60 522.9 486.3 14 ,Oct 63 488.7 506.5

27 Feb 61 518.1 491.4 20 Jan 64 488.3 505.3

12 May 61 511.4 496.1 27 Apr 64 488.2 505.4

28 Jun 61 505.3 499.6 1 Sep 64 485.5 505.5

23 Ju1 61 504.8 499.9 14 Dec 64 483.3 504.0

9 Oct 61 511.1 494.9 20 Jan 65 482.1 503.5

8 Jan 62 512.9 496.3 . 9 Mar 65 486.9 503.4

4 Apr 62 514.4 495.3 8 Jun 65 486.8 502.6

24 Oct 62 512.2 494.2 .' 31 Aug 65 486.4 502.6

13 Mar 63 509.7 495.5 11 Jan 66 296.5 498.1

13 May 63 500.9 500.0 14 Mar 66 300.2 498.5

6 Aug 63 497.9 498.8 9 Jun 66 302.0 498.2

14 Oct 63 497.7 499.6 11 Jul 66 302.6 498.9

30· Apr 64 498.7 498.4 8 Sep 66 303.0 498.1

7 Dec 64 498.6 495.0 ' 7 ,Dec 66 304.9 497.5

9 Jun 65 502.7 493.8 15 Feb 67 303.0 498.2

10 Jan 66 464.1 508.3 17 Mar 67 303.0 501.7

9 Jun 66 464.7 506.3 8 Jun 67 299.2 505.2

7 Dec 66 465.3 505.7 7 Sep 67 297.5 507.0

28 Jun 67 457.3 509.3 7 Nov 67 294.9 505.6

14 Feb 68 456.4 508.1 14 Feb 68 294.9 506.1

16 Oct 68 457.3 504.6 10 Jun 68 292.1 506.0

29 Oct 69 453.5 500.5 2 Sep 68 295.6 505.4

25 May 70 453.2 497.7 11 Oct 68 298.5 505.9

3 Feb 71 456.8 497.1 5 Dec 68 297.8 505.9

12 Feb 69 295.4 506.1

22 May 69 293.7 505.5

Kipuka Nene 26 Jan 60 500.0 500.0 3 Jun 69 293.9 505.3

19°19.4'N 6 Feb 60 504.8 497.2 28 Oct 69 291.5 505.9

155°16.7'W 31 Mar 60 517.7 491.8 13 Feb 70 288.2 504.9

13 Jul 60 526.9 487.2 21 May 70 284.3 502.9

26 Sep 60 529.1 485.5 . 11 Sep 70 286.2 501.2

3 Feb 71 288.6 502.1

67
Tilt Tilt

Tilt Base and Coordinates Tilt Base and Coordinates

Location Date N-S E-W Location Date N-S E-W

Mehana 19 Sep 60 500.0 500.0 Kapapala 19 Dec 62 497.8 505.0

19°26.2'N 2 Nov 60 508.0 514.6 Ranch 14 Mar 63 497.6 505.0

155°14.3'W 2 Mar 61 530.0 533.7 (cont'd) 11 May 63 498.0 503.1

12 May 61 540.1 541.9 8 Aug 63 497.0 503.5

26 Jun 61 541.8 546.6 11 Oct 63 496.0 505.6

25 Jul 61 543.5 547.8 21 Jan 64 496.2 507.5

10 Oct 61 526.8 527.6 28 Apr 64 496.4 508.5

2 Jan 62 532.2 536.6 24 Aug 64 494.5 508.2

26 Mar 62 533.8 535.9 9 Dec 64 494.7 510.1

2 Sep 64 541.4 545.0 19 Jan 65 494.7 510.6

30 Sep 64 543.9 546.5 8 Mar 65 494.8 512.0

1Q Dec 64 547.7 548.3 7 Jun 65 494.2 511.4

16 Jan 65 550.0 549.8 1 Sep.65 493.6 512.3

9 Mar 65 541.3 540.7 27 Dec 65 493.8 513.7

16 Jun 65 539.6 543.0 15 Mar 66 492.5 514.8

9 Sep 65 536.9 546.0 6 Jun 66 492.1 514.8

29 Dec 65 541.9 543.3 6 Sep 66 491.3 516.1

17 Mar 66 .542.1 546.8 6 Dec 66 491.6 517.2

16 Jun 66 544.6 551.1 15 Feb 67 491.6 518.2

12 Sep 66 549.1 555.0 22 Mar 67 493.4 515.9

9 Dec 66 553.4 558.3 6 Jun" 67 493.0 513.7

14 Feb 67 559.2 560.1 5 Sep 67 491.2 512.2

7 Jun 67 560.8 564.2 8 Nov 67 491.7 513.1

6 Sep 67 563.6 568.7 13 Feb 68 492.4 515.0

8 Nov 67 569.0 569.8 11 Jun 68 489.1 514.3

21 Feb 68 572.7 569.8 28 Aug 68 488.9 514.4

12 Jun 68 577.8 577.0 14 Oct 68 490.1 515.6

17 Ju~ 68 579.4 776.9 11 Feb 69 490.1 516.9

2 Sep 68 570.4 570.4 27 Oct 69 486.8 518.4

11 Oct 68 563.3 564.2 11 Feb 70 586.2 519 .. 9·

2 Dec 68 567.5 567.8 20 May 70 484.7 519.4

5 Feb 69 573.2 568.7 10 Sep 70 485.3 518.7

24 Feb 69 569.2 564.0 2 Feb 71 486.3 521.8

21 Apr 69 571.3 566.8

27 May 69 570.0 567.4

30 Oct 69 571.4 572.2

9 Feb 70 577.1 578.0

18 May 70 586.6 584.9

9 Sep 70 589.7 588.7

25 Jan 71 594.8 591.4

Kapapa1a 10 Oct 61 500.0 500.0

Ranch 9 Jan 62 501.0 501.4

19°20.5'N 30 Mar 62 500.3 501.4

155°23.8'W 30 Jun 62 497.0 503.6'

23 Oct 62 497.8 504.5

Table 9. Complete and corrected tilt coordinates at all tilt bases around

Kilauea Caldera (cont'd)

68
REFERENCES CITED

Gossett, F. R., 1959, Manual of geodetic t~iangu1~tion: u. S. Coast

and Geodetic Survey'Spec. Pub. 247, 344 p. '

Hamilton, R. M., B. E. Smith, J. -C. Hall, and J. H., H~aly, 1969,

Summary of seismic activity in the Pahute Mesa area, Nevada

Test Site, December 1968 - June 30, 1969: U. ,S. Atomic Energy

Comm. (USGS-474-58): Spring'fie1d, Va., Clearinghouse for

Federal Sci. and Tech. Inf., 63p.

H8pcke, W., 1966, On the curvature o~ e~ectromagnetic waves and its

effect on measurement of d'i,st'ance: Survey Review, po. 141,

p. 298-31"2.

Kinoshita, W. T., D. A. Swanson, and D. B. Jackson,' i~ press, The

measurement of crustal deformation related to volcanic activity

at Kilauea Volcano, Hawaii: in Physical Volcanoiogy , edited by

L. Civetta, P. Gasparini, G. L~ongo, and A. R4pQlla, Elsevier

Pub!.

Meade, B. K., 1969, Corrections for refractive index as applied to

electro-optical distance measurements: Symp. on Electromagnetic

Distance Measurement and Atmospheric Refraction, Inter. Assoc.

Geodesy, Boulder, Colorado.

Swanson, D. A., 1973, Pahoehoe flows from the 1969-1971 Mauna U1u

eruption, Kilauea Volcano, Hawaii: Geol. Soc. America Bull.,

v. 84, p. 615-626.

Swanson, D. A., and D. W. Peterson, 1972, Partial draining and crustal

subsidence of Alae lava lake, Kilauea Volcano, Hawaii: U. S.

Geo1. Survey Prof. Paper 800C, p. 1-14.

69
PUBLICATIONS OF SPECIAL INTEREST AND HVO CONTRIBUTIONS, 1970

MOore, J.G., 1970, Pillow lava in historic lava flow from Hualalai

Volcano, Hawaii, Jour. Geol., v. 78, no. 2, p. 239-243.

MOore, J.G., 1970, Relationship between subsidence and volcano load, Hawaii,

Bull. Volcanolog1que, Tome XXXIV-2, p. 562-576.

MUrata, K.J., 1970, A test for chemical equilibrium between olivine

phenocrysts and their 'basaltic host melts, reprinted from West

Commemoration vol., Faridabad, India, p 331-336.

MUrata, K.J., 1970 Tholeiitic basalt magmatism of Kilauea and Mauna Loa

Volcanoes of Hawaii, Naturwissenschaften 57, p. 108-113.

Richter, D.H., Eaton, J.P., MUrata, K.J., Ault, W.U., and Krivoy, H.L.,

1970, Chronological narrative of the 1959-60 eruption of Kilauea

Volcano, Hawaii, Geol.Sur~ Prof. Paper 537-E.

Wright, T.L., and Doherty, p.e., 1970, A linear programming and least

squares computer method for solving petrologic mixing problems,

Geol. Soc. Am. Bull., v. 81, p. 1195-2008.

70 *

GPO 69J.1IJ6