Hawaiian Volcano Observatory

1964 Quarterly Administrative reports

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

Compiled By Jennifer S. Nakata

Summary 33

January, February, and March 1964

By Robert Y. Koyanagi, Arnold T. Okamura,

 and Howard A. Powers

Summary 34

April, May, and June 1964

By Arnold T. Okamura, Robert Y. Koyanagi,

and Willie T. Kinoshita

Summary 35

July, August, and September 1964

By Willie T. Kinoshita, Arnold T. Okamura,

and Robert Y. Koyanagi

Summary 36

October, November, and December 1964

By Robert Y. Koyanagi, Arnold T. Okamura, 

Willie T. Kinoshita, and Howard A. Powers

Open-File Report 2007-1324

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

DEPARTfv1ENT OF THE INTERIOR

GEOLOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

Summary 33

January, February, and March 1964

By

Robert Y. Koyanagi, Arnold T. Okamura

and Howard A. Powers

Issued February 1965

Observatory Staff

Geology

J. G. Moore (Transferred to Menlo

Park 2/4/64)

H. A. Powers (Scientist in charge--

Arrived from Denver

1/10/64)

D. L. Peck

Geophysics

D. P. Hill (Arrived from Denver

2/18/64)

W. T. Kinoshita

George Kojima

R. Y. Koyanagi

H. L. Krivoy (Transferred to Denver

1/27/64 )

A. T. Okamura

Geochemistry

R. T. Okamura

T. L. Wright (Arrived

from

Washington

2/5/64)

Support

E. T. Endo

J. C. Forbes

W. H. Francis

B. J. Loucks

Akira Yamamoto
..

Contents

Page

Chronological summary------------------------------------------------ 1

Tilting of the ground around Kilauea caldera------------------------- 3

Seismic Summary------------------------------------------------------ 7

Persons or agencies reporting "felt" earthquakes--------------------- 44

Illustrations

Figure 1. Map of the island of Hawaii showing seismograph stations

and localities mentioned in the text------------------- 2

2. Tilting of the ground around Kilauea caldera between

October 10, 1963, and January 22, 1964----------------- 6

Tables

Table 1. Tilt coordinates at Uwekahuna Vault, January, February,

and March 1964----------------------------------------- 4

2. Tilt coordinates and changes at bases around Kilauea

caldera------------------------------------------------ 5

3. Number of earthquakes and minutes of tremor recorded

on seismographs around Kilauea caldera----------------- 8

4. Local earthquakes recorded by seismographs of the U.S.

Geological Survey-------------------------------------- 12

5. Distant earthquakes-------------------------------------- 17

6. u.s. Geological Survey seismograph stations in Hawaii---- 41
Chronological Summary

The first quarter of 1964 showed less activity associated with the

volcanoes than has been experienced for several years. Mauna Loa

continues to appear calm, and Kilauea has shown no restlessness, although

the density of sulfurous fumes and the amount of sulfur stain on the

lava crusts have increased.

January 7, about OlhOOm__some residents of the Hilo and Puna Districts

were awakened by a quake of magnitude 3.7 and about 8 km deep along the

Poliokeawe fault system, southeast of Makaopuhi, near the coast; 44 small

aftershocks were recordedG

January 29-February 6--a cluster of seismic events included: a

felt quake on the east flank of Mauna Loa, a felt quake 30 km deep of

magnitude 3.3 with 15 aftershocks, 2 half-hour spells of deep tremor,

and more than 100 small shallow local Kilauea quakes in 5 consecutive

days.

h m February 20 at 22 32 --residents of Maui and northern parts of Hawaii

felt a quake of magnitude 4.3. The epicenter was located at about 13 km

depth off the southwest shore of Maui.

March was ushered in by 3 days of more than a hundred shallow local

Kilauea caldera quakes each, and ended with Alaska's Good Friday earthquake,

its tsunami and aftershocks.
EXPLANATION

5EHCEHCEe8t=:==~===31OE:===:::J'P Mile.

• SeismoQraph Station

o Town or locality

19-

25 Kilometer. i. A .J LJ,o 1b...J> I

Contour interWI 1,000 fHt

Datum i. mean uo 'ellel

wai~

Honokaa

~Ooo 0

1'-

Figure l.--Map of the island of Hawaii showing seismograph stations

operated by the Geological Survey and localities mentioned in the

text. Epicenters of local earthquakes are given in terms of

geographic coordinates, which are indicated at the edges of the

map.

2
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 (table 1)) 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 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, i.e., to a re~ative 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.

3
Table 1.--Tilt coordinates at Uwekahuna Vault, January,

'February, and March 1964

Date N-S E-W Date N-S E-W

Jan. 5 467 504 Mar. 1 462 505

12 463 507 8 461 507

19 462 507 15 461 507

26 459 509 22 462 504

Feb. 2 462 508 29 460 504

9 461 508

16 462 504

23 461 506

4

."
\Jl

First quarter, 1964

Table 2.--Tilt coordinates and changes at bases around Kilauea caldera. (See tilt dia

Tilt Base Date Tilt coordinates Rate '(10-6 rad/mo) 

(location) (1964) and direction of 

N-S E-W tilting since 

last reading 

Uwekahuna Jan. 22 440.6 503.1 9·1 N. 51° w. 

5' N. , 155°17.4' W.)

Tree Molds 21 436.3 508.5 4.5 N. 28° w. 

(19°26.3' N. , 155°17.3' w. )

Sand Spit 23 850.4 769.3 10.0 S. 55° w. 

(19°24.1' N., 155°16.8' w.)

Kalihipaa 20 340.4 386.0 1.4 N. 18° w. 

(19°21.4' N. , 155°15.3' w. )

Keamoku 23 492.3 599.4 2.9 r S. 35° w. 

-(19°25.1' N., 155°19.0' w. )

Ahua Kamokukolau 22 631.2 536.6 2.1 S. 66° E. 

119°22.71 N., 155°16.6' w.)

Kipuka Nene 2{) 485.4 509.6 0.4 S. 73° w. 

(19°19.4' N., 155°16.7' W.

Hilina Pali Not occupied this epoch 

(19° 18. 2' N., 155°18.6'

Kapapala Ranch 21 495.2 503.3 0.6 s. 82° E. 

(19°20.5' N., 155°23.8' W.)
CT

o o

\ Kal

• HP

t--t

§ TILTING RATE 2.5 X 10-6 RADIANS I MONTH

OCT 10, 1963 - JAN 22. 1964

I I

5 KM

• KN

Kap

..

2000

Figure 2.--Tilting of the ground around Kilauea caldera, Oct. 10,

1963 to Jan. 22, 1964. 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 circles, short-base watertube tiltmeters.

6
Seismic summary.--Events recorded by the D.Se Geological Survey

seismograph network in Hawaii fall into two categories: local earthquakes

and tremor originating in the region of the Hawaiian Islands, usually

within 100 km of at least one seismograph, and 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 3.

The earthquakes are separated into groups on the basis of region of

origin as dete~mined by" analysis of records obtained daily at the

Observatory CU, M, A, D, N, WP, MPl. Earthquakes of magnitude 2.5 or

greater are generally sufficiently well recorded to., be located

with greater precision; they are listed individually in table 4. Data

on identifiable phases from distant earthquakes are listed in table 5.

Locations of the seismograph stations are shown on figure 1, and

essential data on the stations are listed in table 6.

7
co

Table of earthquakes and minutes of tremor recorded on seismograp

U, M, AI D, N, WP, and MP around Kilauea caldera

Tremor is separated into three deep, and shallow, on the ba

amplitudes on seismographs in the summit Unless otherwise tremor is 

be associated with movement of magma within the central complex of Kilaueae

Earthquake categories are: Halemaumau rock slides, which are detected by the characte

they produce on the North Pit seismograph; shallow earthquakes in the Kilauea .:·calder

shallow earthquakes along the rift zorle of Kilauea and the adjacent portion of th

fault system; earthquakes along the eastern half of Kilauea's east rift zone=-dete.ct

on the Pahoa shortgcperiod earthquakes from a source about 30 km beneath Ha

from the upper east rift zone and the adjacent fault systems of Kilauea'

flank (these a,re usually first arrivals at the Ahua meter or at the new experimental 

Makaopuhi Crater (MP»); and earthquakes from other regions: Kana, Mauna Kea, etc.

Tremor

Date (in minutes) Earthquakes

(1964) Inter- Hale,., SWe rift Eastern Hale- uppe1 Deep mediate Shallow maurnau Kilauea and East maumau East 

slides caldera Kaoiki rift 30 km rift

1 ___ c-. _CiiD_c=-c:-. 65 9 1 6

2 t!IIIIt. CSiI =- a.:) 44 20 "'''-'_CIII 4 7

3 as_c=:t_ 50 21 1 1 2

4 .., __ l:aO -c=c ___ 83 13 ----= ---- 6 2 K

5 a».=- ... .., __ aE:l .. __ 121 2.0 __ -=0'1_ 1. 6 1 M

6 6 __ c-.-=_ 115 14 ----- 35 1 o

1 M

7 ---- __ am_ __ -. 1 .125 17 _e-aIZ:J.c:K" 7 9 K

1 o

8 _-=»"'::aJ -= 0::211,,_ 160 9 15 1 o

1 K

1 M

9 c:s c::I '8 tK) 4 105 18 1 7 22 1 o

1 o

10 -.cm .. .-wc. 1-05 13 1 8 10

11 1 120 10 5 4
Table 35--Number of earthquakes and minutes of tremor recorded on seismograph

U, M, A, D, N, WP, AND MP around Kilauea caldera--Continued

Tremor

Date (in minutes) Earthquakes

{1964) Inter- \ Hale- SW. rift Eastern Hale- Upper

Deep mediate Shallow maumau Kilauea and East mauma-u East 

slides caldera Kaoiki rift 3-0 km rift

Jan 0 12 60 9 7

13 1 64 18 3 6 1 M

14 26 12 1 315 50 3 3 1 K

16 15 2 1 5 1 W

17 35 -8 1 2

18 52 -1-0 7

19 58 21 2 7

20 50 6 7

\.0 21 60 5 1 1

22 80 14 723 80 6 8 2 O

24 70 6 5 725 55 5 2 1126 60 7 5 1 K

1 H

27 35 6

28 60 '7 1 529 75 3 2 4 1 M

30 55 16 3

31 30 43 17 2 8 l o

Feb. 1 50 13 6 11 1 K

1 M

2 45 51 6 6 1 M

3 100 11 3 4 1 o

4 130 5 4

5 7 -1 120 12 4 5

6 50 9 6 7

7 65 5 4 3
r

o

Table 3.--Number of earthquakes and minutes of-tremor recorded on seismogra

U, M, A, D, Nz WP z and MP around Kilauea ca1dera--Continued

Tremor

Date (in mi.nutes) Earthquakes

(1964) Inter- Hale.., SW¥ rift Eastern Hale- Upper

Deep medi8,te Shallow maumau Kilau.ea and East maurnau East 

slides caldera Kaoiki rift 30 km rift

FebQ 8 30 10 1 3 6 2 

9 -.=:I C=.-:: c::Il) 30 7 2 4 7 1 

10 ..... 40 4 2 5

11 __ tIC. t....-<t -=.:3' .... 85 3 4 3

12 _ =- c:.otllE1 ., CEoJll!')" __ .m 80 5 3 3

13 ... ilI8' =-a c::=:-._ 50 6 2 3

14 =CZD_ ... t:IIItc:::ll-=:lC-=:--== 46 3 __ 11::I_ 1 4 1 

15 __ c:;:l 68 6 1 EZ 3m--=

16 25 5 ....... 60 13 ---- 2 5

17 32 --=---- 60 11 --'- 1

18 38 =:5 80 9 ---- 8 1 

1 

19 88 17 6 4 1 

1 

20 az:-:t.-ac::: .. 52 14 -: - =-- 3 3 1 21 t=J_..:J_ __ -==C3I __ 49 10 9 9 1 

22 22 10 __ 50 6 __ l::Sl_ 4 4 1 

23 21 _ __ 50 4 __ 4 6 

24 __ 1- 66 22 1 3 5 1 

1 

25 -= =-0: 22 :z:= ... ..,_:.- 50 16 6 3

26 45 7 1 3 3

27 _ _ c.tl.., =- ma:_ 20 5 3 5

28 75 5 _,..,.c:_ 3 6 

29 ..... 50 7 1 2 14 1 

Mar. 1 __ 50 6 2 5

2 30 - 1 150 12 ---- 5 15

3 2 150 10 ... ...... 1

4 ---'QIIII; :K) __ 170 14 ---- ......---- 12

5 ----- 88 7 ----- 7 1 

'.
II

Table 3.--Number of earthquakes and minutes of tremor recorded on seismograp

U, M, A, D, N, WP, and MP around Kilauea caldera--Continued

Tremor

Date (in minutes) Earthquakes

(1964) Inter- Hale- SW. rift Eastern Hale- Upper

Deep mediate Shallow maumau Kilauea and East maumau East 

slides caldera Kaoiki rift 30 km rift

Mar. 6 ---- ----- ----- 75 10 ---- 1 6 1 

7 --_.- ----- ----- -----=- 88 10 1 10 2 

8 ---- ----- ----- 65 12 4 ---- --

9 ---- ----- .._--- ------ 60 4 --_ ... 1 4

10 ---- ----- ----- ----- 70 4 1 3 3

11 ---- ----- ----- 1 107 9 ___ .:E: 4 2 1 

12 ---- ----- ----- ----- 75 6 ---- ------ 4 --

13 ---- ----- ----- ----- 105 8 - ---- 1 2 2 

14 ---- ----- ----- ----- 76 12 3 3 --

15 ---- ------ c::. ____ ...... _-- 88 9 __ -=--=a ------- 5 2 

16 ---- ----- ----- ------ 100 24 ..,--- 3 3 1 

17 20 --=--- -=----- ----- 75 10 ---- 6 7 --

18 -=---- ----- ----- 1 127 13 --=--- 12 7

19 Severe electrical storm--instruments turned off

20 ··-do- -do-- -do-- -do-- --do-- -do-- -dQ- --do-- -do- . 21 ___ -=- ----- ----- 1 60 3 ---- -=--=----- 6

22 ---- dIIt ____ 4 9 53 6 2 2 6

23 ---- 4 11 63 5 ---- 6 6

24 7 ----- ----- 48 9 1 4 425 ---- ----- -=----- 76 6 ---- 2 10

26 ---- ----- ----- ------ 59 10 ---- 5 l4 1 

-. 1 

27 ---- ----- ----- ------ 101 5 1 1 ----

28 ---- ----- ----- 71 20 ---- 5 6 --

29 ---- ----- ----- ----- 60 7 ---- 5 7 --

30 ---- ----- ----- ----- 73 7 ---- 5 6

31 ---- ----- ----- ----- 80 6 ---- 3 12
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological Survey,

January, February, and March 1964

[Entries for a given quake are: date" origin time (Hawaiian Standard Time), magnitude, d

and felt report. All earthquakes of magnitude 2.5 and larger, as well as many favorabl

smaller ones, occurring on or near the island of Hawaii are4included in the list.

In the following list some origin times are followed by "KM 30" and a statement of magn

all members of a continuing family of quakes noted also in other Summaries. The best m

this group is beneath Halemaumau at a depth of 30 km (19°24.1' Ne, 155°17.1' W.).

In the following list a number of quakes are described as "Upper east rift" (see Summary 

average epicenter is approximately 19°21.5' N., 155°14' W. about 2 km south of Aloi Cra

surface depth.

The mean focus of the magnitude 6.1 Kaoiki fault system earthquake of June 27, '1962, and 

is 19°24' 1,55°25' W.} at a depth of 3-8 km. This focus has been abbreviated "Kaoik

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h m s N. Long. W. Description

- - -

Jan .. 1 20 52 22c4 2,3 ... __ Kaoiki-------------------- 

2 06 20 27.4 __

3 06 18 33·9 ___ _--= __ ... KM 30--------------------- 

3 13 47 04.0 3.1 -_ ... -= _ __ -.r .. .- 

6 05 24 22.4 8 19°08.3' 155°24.5' 22 km SSW of Desert 

seismometer.

6 17 11 13 19°49.1' 155°31.8' 8 km N.. of Pohakuloa - - -'- -- 

7 01 06 2500 3.7 8 9 km SSW of Makaopuhi----- 

7 01 27 2.2 8 19° 16r, 2' 155°13.4' 12 km SSW of Makaopuhi---- 

7 02 04 17e9 3.6 5 19° 3' 155°11.. 8' 2 km N. of Apua. 

7 08 14 8 155°13.2' 3 km SW of Apua 7 18 11 01w6 13 155°31.5' 12 km N. of Pohakl.l1oa - - - - -

7 22 54 52.5 2.3 "--- .... ... -. __ _c.') ____ __ Kaoiki-------------------- 

8 01 10 14.0 2.8 13 19°57' 156°53' 112 km WNW of Kealakekua 

8 03 14 219 13 20°05.6' 155°39c7' 8 km NNE of Kamuela 

'.
'J

Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological Surv

January, February, and March

t---

Date Time Magni- Depth Epicenter 

-(1964 ) tude (km) 

h m s Lat. N. Long. We Description -- -

Jan. 8 11 08 19.5 2.3 8 19°09.8' 155°41.9' 17 km NW of Naa1ehua-----

9 09 47 4405 3.1 13 20°20' 156°02' 20 km WNW of Upolu Pt------c

9 15 01 1204 202 < 3 19°22.1' 155°05.7' 9 km E.. of 

9 18 32 3103 3 19°1408' 155°12eO' 2 km SSW of Apua 

10 01 58 1405 2.2 c.- ___ _____ __ r=-_ ... 

10 19 13 15.4 2.5 8 19°16.. 5' 155°13 .. 2' 4 km NW of Apua Pt---------"

15 04 59 33.9 2.0 8 19°16.6' 155°1403' 6 km NW of Apua Pt--------

16 15 40 5700 300 13 20°0604' 155°4908' 16 km WNW of Kamue1a ca=----

18 20 46 49.9 203 _.__ __ 1:ZI 1I:-e-:::J_mD_a=c=-_t=- 

23 15 43 49.5 2.0 3 19°2408' 155°08.2' 7 km NE of Makaopuhi------23 17 43 07.5 3.0 13 19°42' 156°08' 32 km NW of 

23 19 04 47.0 2.7 13 18°50 1 155°19' 40 km SE of 

25 23 58 23.0 205 8 19°15.6' 155°13 .. 2' 3 km W.. of Apua26 20 40 44.0 2.5 45 19°13.3' 155°03.8' 16 km ESE of Apua Pt-------

30 05 38 43.3 3.2 __ __ __ 

31 00 29 00.1 303 ---... _ClS_c::a.__-=-c=- ... KM 31 05 44 36.0 2.2 -=- ____ c=-_E::J ____ __ KM 30----------------------31 18 31 41.0 2.6 8 19°3304' 155°5908' 10 km WNW of Kea1akekua---

1 19 44 16.5 8 19° 48. l' 155°3405' 8 km NW of 

2 13 48 40.0 2g3 3 19° 17. 155°12.8' 12 km SSE of Ahua seismome

2 22 12 48.0 2.2 ----=-- ___ a.a __ -=a_ ---------- Kaoiki---------------------

3 09 2-7 20.0 2.0 8·- 19°13.7' 155°29.3' 3 km NNW of Pahala--------

3 11 06 34eO 2.8 8 19°35.5' 156°07.5' 24 km WNW of Kea1akekua--

'4 11 29 41.6 2.5 13 19°26.8' 155°16e9' 3 km NNE of Uwekahuna----
Table earth uakes recorded b seismo ra hs of the U&S. Geol0 ical Su

January, February, ffnd March 19

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h lTI S Late, N. Lop-g. w. Description - -

Feb" 5 15 57 __ 

6 01 18 2.2 --

_

... KM 

7 01 35 46.5 2.7 3 19°16.3' 155°07.5' 8 km ENE of Apua 7 08 06 2.8 3 19°18.0' 155°0300' 16 km ESE of Makaopuhi-

8 14 22 3,4 13 18°40' 156°56' 137 km WSW of South Poin8 20 05 2.0 8 19°01a5' 155°20.5' 27 km ESE of

9 12 09 32.5 2.5 8 155°48.2' 27 km SSE of Kea.Lakekua9 21 06 2.9 __ KM 30-------------------

10 12 57 50.2 2.5 --..-_-=- Kaoiki------------------

13 21 21 27.0 2.8 .. __ -=:J ____ ---------=-

14 21 50 1100 3Jl 13 200 34 i 155°49' 33 km NNE of Upolu Pt---

16 03 10 37.5 300 --------- Kaoiki------------------

18 02 59 48.3 2.4 8 19°07.. 8' 155°43.3' 16 km WNW of 

19 23 56 15.0 2.5 8 155° 35.8' 8 km BE of Waikii-------

20 22 31 44.5 4.3 13 20° 42' 155°50 1 41 km ESE of Ha1eakala ...-

21 00 39 5400 4 8 155°47.2' 27 km NE of Kealakekua--

21 17 14 2.1 _ ____

...

21 23 45 5300 2G3 3 19°18,,2' 155°07.5' 10 km BE of 

22 14 45 57.5 2v5 8 19°15,,9' 155°52,,2' 10 km NNE of Milo1ii-----

23 18 22 48.9 2.0 19°244'9' 155°14.5' 5 km NNE of Ahua seismom24 05 42 52.0 8 19°17.2' 154°50.9' 16 km SE of Kalapana------a

00 51 2.1 3 19°2003' 155°05 .. 9' 9 km ESE of Makaopuhi .... 

23 51 204 8 19°18 .. 1' 155°09.0' 8 km SSE of

-

...
•

Table 4.--Local earth uakes recorded b seismo raphs of the UoSe Geolc ical Sur

January, February, and March 19

Date Time Magni- Depth Epicenter 

(1964) tude ---{km) 

h m s Lata Nc We Description - - -

Feb 0 26 09 29 27.3 205 _s.- __ __ -=-e- KM 

26 16 55 59.8 2.2 -.. ____ -=- __ -=-_c.I ... .-c:::=-_ .. KM

29 22 46 4905 301 5 19°1900' 155°0700 1 8 km ESE of Makaopuhi----

29 23 49 36c2 2.6 8 19°14.8' 155°34c8' 20 km Nll of

Mar 0 1 12 33 5507 201 3 155°1108' 3 km No of Apua Pt-------

1 15 42 56 6 0 205 ___ C3_ ___ .. c:::._ .. __ e:=Ite::- __ KM 

1 19 22 27eO 2Q7 I::'c:aC=-="E:I __ c::8 

2 11 12 4902 208 _ca __ Kaoiki==-----------------

5 22 19 1203 3.0 13 19°5202' 155°36.5' 19 km SSE of 

7 01 05 01.. 0 2c7 13 19°18e8' 155°5305' 23 km SSE of Kealakekua--

7 19 01 46e5 3.0 13 19°12' 156°28' 67 km wsw of Kealakekau--

7 20 15 07.0 200 ---- 

10 00 54 3800 3e6 8 19°16c5 i 155°1009' 2 km NE of Apua Pt-----=-

10 15 00 03.3 8 19°11.5' 155° 26. 8\t 3 km ESE of Pahala------E:a

10 22 09 0804 2.0 ca ___ _____ 

11 19 08 14G5 2e6 8 20°04,,6' 155°4903' 13 km WNW of Kamue1a-"..---

11 19 30 56.4 3.7 10 19°17.5' 155°0508' 12 km SE of 

13 11 55 09.0 2e8 3 19°30.8' 155°36.0' 3 km NW of North Bay 

seismometer"

13 21 20 20.5 2.4 8 19°09,,1' 155°40.0' 14 km NW of Naalehu------- 

14 05 44 42.0 2.5 ----- ______ --------- Kaoiki-------------------- 

14 15 ·58 15.5 203 3 19°23,,2' 155°47.1' 21 km SE of Kealakekua---

15 12 56 36.9 3.2 3 19°21G1' 155°07.1' 7 km ESE of Makaopuhi----

15 19 55 37.0 2.4 8 19°22.8' 155°56.3' 4 km wsw of Hookena------- 
Table earthquakes recorded by seismographs of the U.S. Geological S

January) February, and March 1964--Continued

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h m s Lat. N. Long. W. Description - - -

Mar. 15 19 55 37.0 2.4 8 155°56.3' 4 km WSW of Hookena 

16 09 09 56.7 13 19° 15 t 156°25' 62 km wsw of Kealakeku

16 12 17 36.5 ___ __ 

16 23 06 2e8 tIIa! _____ r:::.J_ Kaoiki---------------

17 21 13 1299 3 155°05.8' 12 km ESE of Makaopuh

18 13 25 2.3 25 19°18.0' 155°15.5' 8 km 80 of Ahua 

seismometer.

19 21 14 20.0 2.3 8 155°0200' 30 km SSE of Makaopuh

20 07 52 1305 I ... _IIR-= __ __ KM

23 03 08 5000 2.0 .-:c:.c.-::-. KM

24 02 05 12.7 2,,0 3 19°15.9' 155°12.3' 2 km NW of Apua Pt---24 02 43 8 19°22.8' 155°02.9' 15 km ENE of Makaopuh

24 12 57 3eO 3 19°22.1' 155°05.2' 11 km E. of Makaopuhi 

24 16 12 35.5 2.0 8 19°15.5' 155°29.4' 16 km SW of Desert

seismometer.

25 17 32 42.7 2·926 00 54 49QO 8 19°52.5' 155°10.0' 19 km NNW of Hilo----

26 17 11 30.0 2.. 6 8 19°11.3' 155°25.9' 22 km NE of Naa1ehu=c=

27 02 10 22·5 2t,4 3 19°21.8' 154°54.8' 15 km SSE of Pahoa---.

28 12 03 46.2 205 __ ___ _ _.E. KM 30---------------=

29 16 16 15.0 2,,2 8 19°16,,2' 155°13.8' 4 km WNW of Apua Pt--

30 11 22 47.0 206 -- --------=-.- Kaoiki---------------

30 12 15 35·0 2.6 3 19° 1·7 4' 155°10.7' 10 km 8 of Makaopuhi 
'."

Table 5.--Distant earthquakes

[Times are reported in Greenwich Civil Time which is 10 hours faster

than Hawaiian Standard Time. A "c" following the time of P indicates

compressional first motion; a "d" indicates dilatational first motion.

Station symbols, locations, and instrumentation are presented in

table 6. Magnitudes calculated from the Hawaii seismograms are

followed by (HVO). Location of epicenter, origin time, focal depth,

and magnitude are taken from "Preliminary Determination of Epicenters"

published by the U.S. Coast and Geodetic Survey.

The great number of aftershocks following the March 28 Alaskan

earthquake necessitated a separate listing of these events (end of

this table). Many Alaskan aftershocks continued to occur after

the end of the quarter, and these will again be listed separately

as "Alaskan aftershocks" in HVO Summary 34]

Jan. 5, 1964 Jan. 6

C&GS card l-64~

18:33:5407

8.0° S., 74.5° w.

Central Peru

h about 150 km

Magnitude 5.2 (CGS)o

Jan 0 5-6 Jan. 7

C&GS card 1-64:

23:45:23.4

50.9° N., 157.3° E.

Southern Kamchatka

h about 33 km

Magnitude 5.6 (CGS)

5.9 (HVO)o

(

M Z

D Z

rvIP Z

U Z

Pa Z

Ke Z

eP

eP

iP

iP

iP

eP

18:46:51~8 c

50.6 c

49.8 c

5007 c

49.6 c

52.8 c

M

U

U

U

Z eP

PEE eS

PEN iG

PEZ iR

23:54:05.5 c

00:01:07

00:05:27

00:07:31

C&GS card 3-64:

23:46:1007

52.3° S., 28.6° E.

Prince Edward Islands region

h about 33 km

Magnitude 6.5 (HVO}.

M

D

Na

Ke

Ha

U

U

U

U

Z ept

Z ept

Z eFt

Z ep t

Z ep t

PEN iSS

PEE eL

PEN eGo

PEZ eR

00:05:52.0 d

5008 d

49.7 d

52.3 d

00:06:01.8 d

00:29:25

00:47:05

00:48:32

00:55:17

17

M Z iP 08:54:56.0 c

A Z eP 57·5 c

D Z iP 57.8 c

MP Z eP 58.0 c

U Z eP 57.0 c

Pa Z eP 56.9 c

C&GS card 1-64:

08:46:48.0

54.0° N., 165.5° w.

Fox Islands, Aleutian Islands

h about 80 km

Magnitude 4.7 (CGS).

Jan~ 8

M Z iP 22:43:30.1 c

C&GS card 1-64:

22:30:52.5

308° S., 119.3° E.

Celebes

h about 112 km

Magnitude 5.3 (CGS).
Table 5.--Distant earthquakes--Continued

,i

Jan. 13

Janc. 15

M Z eP 2l:45:55~9 d

A Z iP 57a2 d

D Z iP 5600 d

U Z iP 57~0 d

Pa Z iP 59cl d

Hi Z iP 57.7 d

Na Z iP 56c2 d

Ke Z iP 50~8 d

Ha Z iP 47~6 d

U PEZ i.R 22:08:34

C&GS card 3-64:

21:36:05~0

29.1 0N., l40~8° E.

South of Honshu, Japan

h about 70 km.

Magnitude 6~75 (Pas)

6~ 4 (CGS)

Jane 18

M Z iP 12:16:3806 c

D Z eP 38~7 c

U Z iP 3903 c

Ke Z iP 3203 c

Na Z iP 37~2 c

Hi Z iP 40aO c

Pa Z iP 41~2 c

U PEE is 12:27:24

U PEN iL 12:36:26

U PEZ eR 12:40:26

C&GS card 4~64:

12:04:40&0 0

23~loN., 120.5 E.

Taiwan

110 dead, 479 injured

h about 33 km

Magnitude 6.75 (Pas), 6~75-7

18 (Brk), 6ft5-6~75 (Pal),

6.. 1 (CGS) J 6. 5 (HVO )'.

08: 57= 57

56

54

52

53

54

57

52

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

preliminary listing.

M Z

A Z

D Z

MP Z

U Z

Pa Z

Hi Z

Na Z

Japan No C&GS

Jan,: 10, 1964

M Z iP 05:00:34.,5 c

D Z eP 35.0 c

U FEE is 05:08:30

U PEZ eR 05:16:32

C&GS card 1-64:

04:50:53~4

42~0° N., 142~6° E.

Near south coast of Hokkaido,

h about 33 km

Magnitude 5,,75-6 (Brk), 5w"5 (CGS),

6~ 2 JHVO).

Jan~ 10

M Z iF 17:06:44~2 c

C&GS card 2-64:

16:57:26.5

45~4° N~, 150~0° E.

Kurile Islands

h about 50 km

Magnitude 5 4 .( eGS ) .

Jan. 12

M Z iP 06:07:02.1 d

A Z iF 03.1 d

D Z iF 03*.2 d

U Z iP 02.6 d

Pa Z iP 02~5 d

Hi Z iP 00~6 d

Na Z iP 05~0 d

Ha Z iP 06:06:50.2 d

U PEZ eR 06:16:07

M Z Tmax 06:44:30

A Z Tmax 06:44:57

D Z Tmax 06:44:35

U Z Tmax 06:44:26

Pa Z Tmax 06:44:36

Ha Z Tmax 06:42:41

Hi Z Tmax 06:44:08

C&GS card 4-64:

06:00:13~2

53D 20N., 166.3° We

Fox Islands, Aleutian Islan.ds

h about 33 km

Magnitude 5~5 (cas), 5.8 (HVO).
~able 5.--Distant earthquakes--Continued

17:27:44.3 c

45.;1 c

44.5 c

45.4 c

44.7 c

35.7 c

41.0 c

44.4 c

44.8 c

45-9 c

Feb. 5

Jan. 26

11:43:01.4 c

02.6 c

11:42:59.3 c

11:43:03.8 d

05.1 c

07.3 d

09:22:20.4 c

20.7 c

20.1 c

20.6 c

19.4 c

20.6 c

24.6 c

C&GS card 12-64:

11:30:15.7

36.5° N., 141.0° E.

Central Honshu, Japan

Felt: Tokyo

h about 46 km

Magnitude 6.25 (Pas), 5.4 (CGS),

5.8 (HVO).

Feb. 5, 1964

Hi Z eP 11:40:08 d

U PEE eS 11:48:04

U PEZ eR 11:56:16

M Z Tmax 12:43:02

A Z Tmax 12:42:55

MP Z Tmax 12:42:57

U Z Tmax 12:42:53

Pa Z Tmax 12:43:04

A Z iP

D Z iP

:MP Z iP

U Z iP

Pa Z iP

Hi Z iP

Ke Z iP

C&GS card 9-64:

09:09:33.9

16.3° S., 71.7° W.

Southern Peru

6 injured, slight damage

at Arequipa

h about 116 km

Magnitude 6.1 (CGS).

D Z eP

U Z eP

Na Z eP

Pa Z iP

Hi Z iP

Ha Z eP

C&GS card 12-64:

11:35:18.6

19.7° S., 179.8° w.

Fiji Islands region

h about 414 km

Magnitude 5. 5 (eGs)

Jan. 22, 23

M Z eP 00:08:52 d

U PEN eS 00:15:58

U PEN eG 00:20:22

U PEZ eR 00:22:46

C&GS card 9-64:

23:59:43.6

13.7° S.~ 165.9° w.

New Hebrides Islands

h about 33 km .

Magnitude 6.0 ~CGS), 6.1 (HVO).

Jan. 24

Jan. 20, 1964

M Z eP 17:17:37.4 c

A Z eP 37.1 c

U Z eP 37.2 c

Na Z eP 33.9 c

Hi Z eP 40.0 c

U FEZ i 17:18:16 d

U PEE is 17:24:56

U FEN eBS 17:28:57

U PEN eG 17:30:18

C&GS card 7-64:

17:08:37.4

20.7° S., 169.9° E.

Loyalty Islands region

h about 141 km

Magnitude 6.75 (-Pas.), 6.1 (CGS;,

6.0 (HVO}.

M Z iP

A Z eP

D Z iP

MP Z iP

U Z eP

Ha Z iP

Ke Z iP

Na Z iP

Hi Z iP

Pa Z iP

C&GS card 7-64:

17:17:45.5

38_7° N., 129.4° E.

Near East Coast of Korea

h about 54.2 km

Magnitude 5.3 (cGS).

19
Table 5.--Distant earthquakes--Continued

C&GS card 14-64:

l3:07:25~2

55.7° N., 155~8° w.

Kodiak Island region

h about 33 km

Magnitude 6c75-7 (Pas), 6~5-6.75

GBrk), 6u75~7 (Pal),

6~ 5 (HVO).

Feb. 6; 1964

M Z iP 13:14:26.1 c

A Z eP 27~1 c

D Z eP 27.4 c

U Z eP 26.4 c

Ha Z eP 18.3 c

Pa Z eP 25c7 c

Na Z iP 30.2 c

Ke Z iP 25.8 c

U PEN is 13:20:12

U PEZ iR 13:24:02

M Z Tmax 13:52:57

A Z Tmax 50

D Z Tmax 44

MP Z Tmax 13:52:48

U Z Tmax 59

Pa Z Tmax 55

Ke Z Tmax 40

Ha Z Tmax 13:51:05

Feb. 6--Continued

iP 11:25:15.7 c

Tmax 15:45:46

Tmax 44

Tmax 35

Tmax 15 :43: 54

Z

Z

M

C&GS card 17-64:

15:00:32.6

56.1° N., 154.3° w.

Kodiak Island region

h about 33 km

Magnitude 4.4 (CGS).

Feb~ 8

M Z

U Z

Pa Z

Ha Z

M

C&GS card 14-64:

13:13:45.2

55.8° N., 155~9° w.

Kodiak Island region

h about 33 km

Magnitude 5.4 (cas).

C&GS card 12-64:

15:19:38.1

10.5° S., 120.7° E.

Sumba Island region

h about 43 km

Magnitude 4~9 (CGS).

Feb. 6

Feb~ 6

iP 13:20:4509 c

iP 47.0 c

eP 46~3 c

iP 45.2 c

iP 49.5 c

Tmax 13:59:04

Tmax 04

Tmax 13:58:57

Tmax 13:59:00

Tmax 07

Tmax 13:58:55

Tmax 13: 57: 34

Tmax 13: 58 :44

Feb. 6

M Z

P Z

U Z

Pa Z

Na Z

M Z

A Z

D Z

MP Z

U Z

Pa Z

Ha Z

Ke Z

20
Table 5.--Distant earthquakes--Continued

C&GS card 15-64:

16:29:45.0

5.1° S., 151.7° E.

New Britain

h about 55 km

Magnitude 6.75 (Pas), 6.0 (CGS),

6.4 (HVO).

Feb. 14--Continued

C&GS card 16-64:

20:32:53.6

40.2° N., 124.6° W.

Near coast of Humboldt

Ca.lifornia

h about 27 km

Magnitude 4.6 (CGS)

C~GS card 15-64:

09:53:5101

44.6° N., 150.0° E.

Kurile Islands

h about 50 km

Magnitude 5.2 (CGS).

Feb. 26

COilllty,

iP 10:02:53.6 d

eP 54.3 d

Tmax 21:14:56

Tmax 56

Tmax 56

Tmax 34

Tmax 56

Tmax 37

Z

Z

M Z

A Z

U Z

Pa Z

Ka Z

Ha Z

Feb. 20

M

D

C&GS card 12-64:

02:00:07.3

16.5° S., 179.2° W.

Fiji Islands region

h about 480 km

Magnitude 5.3 (CGS).

Feb. 8, 1964--Continued

A Z iP 17.1 d

U Z eP 16.2 c

Ha Z iP 08.9 d

Pa Z iP 17.5 d

Hi Z iP 15.3 d

Na Z iP 18.2 d

Ha Z Tmax 12:05:08

C&GS card 12-64:

11:17:46.5

52.3° No, 175.6° E.

Rat Islands, Aleutian Islands

h about 60 km

Magnitude 5. 4 (CGS) .

Feb. 9

M Z iP 02:07:23.4 c

A Z eP 23.0 c

U Z iP 23.2 c

Na Z iP 19.2 c

Hi Z iP 25.7 c

Ha Z iP 28.0 c

Feb. 12

U PEZ iR 22:51:31

M Z Tmax 23 :23 :08

Ke Z Tmax 23:22:55

C&GS card 16-64:

22:33:59.2

15.3° S., 174.4° w.

Samoa Islands region

h abou.t 33 km

Magnitude 5.75 (Brk), 5.0 (CGS).

Feb. 14

A Z eP 16:39:32.0 c

Na Z iP 28.2 c

U PEE eS 16:47:35

U PEN eG 16:53:43

U PEZ eR 16:56:07

Mar. 2

M Z iP 19:40:30.8 c

A Z iP 30.5 c

u Z iP 30.7 c

Pa Z iP 32.4 c

Ha Z iP 36.3 c

C&GS card 24-64:

19:32:41.7

18.9° S., 174.8° w.

Tonga Islands

21 h about 105 km

Magnitude 5.3 (CGS).
Table 5.--Distant earthquakes--Continued

Mar. 3, 19641

M Z Tmax 20:44:04

Ha Z Tmax 20:43:42

C&GS card 18-64:

20:02:33.1

40.3° N., 12501° W~

Near coast of Northern California

h about 33 km

Magnitude 4.8 (CGS).

Mar. 8

Mar. 14--Continued

Ha Z

C&GS card 27-64:

15:05:54a4

13.7° S.: 172.3° E.

New Hebrides Islands region

h about 611 km

Magnitude 5.1 (CGS).

Mar~ 15

C&GS card 20-64:

13:59:54~8

1.9° N.) 127.5° E.

Molucca Passage

h about 117 km

Magnitude 5~6 (CGS).

C&GS card 31-64:

01:35:48~1

44~00 Se, 168~4° E.

South Island, New Zealand

h about 33 km

Magnit~de 5.6 ~CGS7.

C&GS card 20-64:

01:o6:oo~4

1.80N~J 127.1° E.

Molucca Passage

h about 58 km

Magn,itude 596 JCGS).

Mar. 14

M Z iP

NB Z iP

Pa Z iP

Na Z iP

04:45:1t9~6 d

50.9 d

50.8 d

49.0 d

5101 d

51.5 d

49.4 d

47.0 d

39.7 d

04:52:40

04:55:00

Z iP

Z iP

Z iP

Z iP

Z iP

Z iP

Z iP

Z iF

Z iP

PEN is

PEN" esS

Mar) 18

C&GS card 23-63:

04:37:26.9

5205° N., 153.6° Eo

Sea of Okhotsk

h about 440 km

Magnitude 5~6 (CGS).

M

D

U

NB

Pa

Na

Hi

Ke

Ha

U

U

C&GS card 20..,64:

22:30:26.0

36.2° No, 7.60w.

West of Strait of Gibraltar

Felt: Portugal, Spain,

Morocco

h about 27 km

Magnitude 6.75~7 (Pas), 7-7~25

, {Bks), 6.25-6.5 (Pal),

6.2 (CGS), 6.8 (HVO}.

U PEZ ePP 22:50:18 c

U PEN iPS 23:00:12

U PEZ iSS 23:06:46

U PEE eSSS 23:09:44

U PEE eL 23:18:52

U PEZ iR 23:25:04

15:13:24~8 d

24100 d

26.9 d

21.0 d

iP 01:17:55.1 d

iP 01:47:0903 d

iP 01:47:10.6 d

eP 14:11:41.2 c

Z

Z

Mar. 10

Mar, 11

A ,Z

Fa Z

M

M

22
Table 5.--Distant earthquakes--Continued

Mar. 21

C&GS card 25-64:

03:42:19

6.4° B., 127.9° E.

Banda Sea

Felt: Darwin, Australia

h about 367 km.

Mar. 19, 1964

Na Z eP 21: 51:21. 4 d

Ke Z eP 26.5 d

U PEN" eB 21:57:28

U PEZ eR 22:01:00

C&GS card 24-64:

21:44:03 .. 8

15.1° S., 172.6° w.

Samoa Islands region

h about 33 km

Magnitude 5.6 (CGS).

Tmax 09:28 :04

Tmax 09:28:02

Tmax 10:23:53

Tmax 10:23:03

Mar. 25

C&GS card 26-64

08:46:13.0

40.4° N., 124.8° w.

Near Coa~t of Northern California

h about 33 km

Magnitude 4. 5 .{ CGS ) .

Mar. 26

Ceram Sea

h about 33 km

Magnitude 5.1 -(CGS).

Mar. 24

C&GS card 25-64:

09:37:56.2

51.1° N., 129.6° w.

Vancouver Island region

h about 22 km

Magnitude 4.2 (CGS).

WP Z iP 02:14:45.8 d

U PEZ eR 02:32:01

C&GS card 27-64:

02:04:20.2

11.3° N., 142.0° E.

Mariana Islands

h about 33 km

Magnitude 4.9 (CGS).

Mar. 22--Continued

Pa Z

Ha Z

C&GS card--Continued

Pa Z

Ha Z

iP 16:36:14.9 d

iP 17.9 d

iP 14.9 d

iP 20.9 c

u Z iF 03:53:51.4 c

Pa Z iP 53.3 c

Na Z iP 49.6 c

Hi Z iP 53.5 c

Ke Z iP 48.6 c

u PEN iB 04:03:26

U PEN iSS 04:08:40

Mar. 21

C&GS card 25-64:

16:27:11.7

27.6° S., 177.2° w.

Kermadec Islands region

h about 33 km

Magnitude 5.6 (eGB).

u Z

Hi Z

Ke Z

Ha Z

Mar. 22

M Z iP 05:44:17.6 d

C&GS card 26-64:

05:32:07.7

2.7° S., 126.4° E. 23
Table 5.--Distant earthquakes--Continued

Mar. 26

M Z eP 13:39:28.1 d

U PEZ eS 13:47:23

U PEN eG 13:52:37

U PEZ eR 13:54:55

M Z Tmax 14:39:05

A Z !'Tmax 14:39:08

D Z Tmax 14:39:04

MP Z Tmax 14:38:52

U Z Tmax 14:39:03

Pa Z Tmax 14:38:22

Na Z Tmax 14:38:58

Hi Z Tmax 14:38:37

NB Z Tmax 14:38:30

Ha Z Tmax 14:40:19

C&GS card 25-64:

13:29:5602

4.4° S., 104.7° w.

1500 km southwest of Galapagos

Islands

h about 33 km

Magnitude 4~9 (CGS)

Mar. 27

M Z eP 20:30:12.6 c

A Z eP 12.2 c

U Z eP 12.6 c

Ke Z iP 11.2 c

Hi Z eP 13.8 c

Ka Z eP 14.7 c

Ha Z eP 18.7 c

C&GS card 25-64:

20:22:10.6

23.7° S., 179.9° E~

South of Fiji Islands

h about 520 km

Magnitude 5.0 -( cas).

Mar. 27

M Z eP 20:30:12.6 c

A Z eP 12.2 c

U Z eP 12.9 c

Ke Z iF 10.2 c

Ha Z eP 18.7 c

2

Mar. 27--Cont1nued

C&GS card 25-64:

20:22:10.6

23~7° B., 179.9° E. Bo~th of Fiji Islands

h about 520 km

Magnitude 5. 0 (CGS) 0

Major Alaskan Earthquake and its

aftershocks are listed separately.

Mar. 28

M Z iP 11:42:22.3 d

A Z eP 2202 d

D Z iP 21.4 d

U Z iP 2205 d

Pa Z iP 23.9 d

Na Z iP 19.0 d

Hi Z eP 24.3 d

Ke Z iP 19.1 d

C&GS card 31-64:

11:30:09.8 ,

0.5° N., 122.3° E..

Northern Celebes

h about 140 km

Magnitude 5. 8 (CGS ) ·

MarG 29

M Z iP 21:50:15.6 c

D Z iP 14.8 c

Pa Z eP 18.0 c

Na Z iF 11.3 c

Ke Z iF 12.3 c

u PEZ eR 22:05:26

C&GS CARD 31-64:

21:40:32.7

6.7° s., 155.1° E.

Solomon Islands

Felt: Rabaul

h about 68 km

Magnitude 6 (Pal), 5.3 (CGS).
•

Table 5.--Distant earthquakes--Continued

Mar. 31, 1964

M Z eP 00:23:24 c

Hi Z iP 00:23:23.4 c

U PEE eS 00:30: 50

U PEN eG 00: 35:10

U PEZ eR 00:37:18

C&GS card 31-64:

00:14:11.7

45.3° N., 151.0° E.

Kuri1e Islands

h about 60 km

Magnitude 5.5-5.75 (Pal),

5. 3 (CGS).

Mar. 31

Ke Z iP 09:08:48.0 c

NB Z eP 09:08:43.5 c

U PEE eS 09: l 4:38

U PEN i 09:17:02

U PEZ eR 09:18:06

M Tmax 09:47:16

A Tmax 36

D Tmax 27

U Tmax 39

Pa Tmax 29

Hi Tmax 09

Ha Tmax 09:46:43

C&GS card 31-64:

09:01:30.2

50.8° N., 130.2° w.

Vancouver Island region

h about 15 km

Magnitude 6 (Pas)! 6-6.25 (Brk),

6.5-6.75 (Pal), 5.6 (eGs) .

25
Table 5" --Distant earthquakes--Continu.ed

The Good Friday Alaskan Earthquake and its aftershoc.ks

YT..ar. 28

U Z' Tmax 06:35:5·0

Pa 'z Tmax 39

Hi Z Tmax 27

Ha Z Tmax 06:34:15

C&GS card 28-64:

05:44:54.9

60.1° N., 148.4° w.

h about 33 km

Magnitude 4~9~

C&.GS card 28-64:

06:08:44.2

60.1° N~, 148.6° w.

h about 20 km

Magnitude 4.25-4.5 (Brk), 5Q6 . {CGS).

Mar. 28

iP 06:l6:26~9 d

iP 28.2 d

z

z

Mar" 28

M

D

C&GS card 28-64:

03:36:12.7

61.1° N., '.147.6° w~

Prince William Sound, Alaska

114 dead or missing, many injured

and major property damage in

Alaska. Extensive damage from

seismic sea waves throughout

the Gulf of Alaska, along the

West Coast of North America,

and in Hawaii 0

h about 20 km

Magnitude 8.4 (Pas), 8.5~8.75

(Brk), 8~6 (Pal),

(8~ 5 (CGS) 0

Mar. 28, 1964

A z iP 03:44:0503 d

D Z iP 05.4 d

u Z iP 04.6 d

Ke Z iP 03.9 d

Pa Z eP 03.8 d

Hi Z eP 01.6 d

Na Z iP 07.9 d

Ha Z eP 03:43:54.1 d

C&GS card 28-64:

05:33:52e6

60e2° N8' 146.2° W~

h ab'out 20 km

Magnitude 5{. 6 (CGS)

C&GS card 28-64:

05:31:05.4

58.1° N., 150~1° w~

h about 33 km

Magnitude 5~3 (cas).

Mar 0 28

C&GS card 28-64:

06:32:3806

60Q1° N.) 147.6° W.

h about 33 km

Magnitude 4c5-4~75 (Brk),

5e5 (CGS) 0

Mar. 28 •

06:49:09.9

10.1

07~4

07:31:16

01

33

07:30:05

iP

eP

iP

Tmax

Tmax

Tmax

Tmax

eP 06:40:19.3 d

iP 18.9 d

iP 19.9 d

iP 19.5 d

z

z

z

z

z

z

z

z

z

z

z

M

U

Hi

U

Hi

Pa

Ha

U

M

D

A

26

Tmax 06:25:08

Tmax 08

Tmax 06:22:30

Tmax 29

Tmax 07

Tmax 06:20:59

u Z

Pa Z

Mar. 28

M Z

Pa Z

Hi Z

Ha Z
Table 5.--Distant earthquakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks

Mar. 28--Continued

C&GS card 28-64:

06:41:28.0

59.9° N., 147.8° w.

h about 15 km

Magnitude 4.75-5 (Brk),

5$ 5 (eGs).

C&GS card 28-64:

07:10:21.4

58.8° N., 149.5° w.

h about 20 km

Magnitude 6.2 (Pas), 5.75-6

(Brk), 6.1 (CGS)~:'

Mar. 28

C&GS card 28-64:

06:43:57.4

58.3° N., 151.3° w.

h about 25 km

Magnitude 5.5-5 .. 7 C).'.' (Brk), 6.1 (CGS).

C&GS card 28-64:

07:24:21.7

59.3° N., 149.8° w.

h about 20 km

Magnitude 5.0 (cas).

Mar. 28

Mar. 28

u Z

Pa Z

Hi Z

iP

eP

eP

06:51:22.8 d

06:51:21.1 d

20.0 d

U

Pa

Hi

Ha

Z

Z

Z

Z

Tmax

Tmax

Tmax

Tmax

08:15:33

52

31

08:14:23

Ma.r. 28

U Z eP 06:58:12.0 d

Hi Z iP 09.1 d

u Z

Pa Z

Hi Z

Ha Z

Tmax 08:17:22

Tmax 45

Tmax 27

Tmax 08:16:01

C&GS card 28-64:

06:50:48.9

57.1° N., 152.3° w.

h about 33 km

Magnitude 5.0 \CGS).

Mar. 28

C&GS card 28-64:

07:28:20.5

57.9° N., 150.4° w.

h about 20 km

Magnitude 5. 0 (~GB/).

Mar. 28

•

U Z

Hi Z

iP 07:01:07.0 c

iP 04.3 c

M Z

Pa Z

iP 07:37:49.5 d

Tmax 08:19:38

COOS card 28-64:

06:53:35.6

58.8° N., 149.5° W.

h about 20 km.

Mar. 28

C&GS card 28-64:

07:30:29.6

57.4° N., 151.7° w.

h about 15 km

Magnitude 5.25-5.5 (Brk),

5.7 -( CGS).

u Z iP 07:17:52.5 d

Pa Z eP 50.9 'd

Hi Z eP 49.9 d

Ha Z iP 42.4 d

Pa Z Tmax 07:59:22

27

Mar. 28

u Z

Pa Z

Tmax 08: 37: 19

Tmax 37
Table 5~ --Distant earthquakes--Continued

The'Go~~ Friday Alaskan Earthquak~ an~ its aftershocks

Mar. 28--C'ontinued

C&GS card 28-64:

07:48:47.8

57~0° N.} 153~3° w~

h abqut 15 km

Magnitude 5 0 -1 CGS ) ,f

C&GS card 28-64:

07:47:47.1

58.3° N. J 150.2° W~

h 33 km

Magnitude 438 (CGS)~

Mar. 28

U Z Tmax 09=42:07

Fa Z Trnax 09:41:47

Ha Z Tmax 09: 40: 27

eP 09:08:10.7 d

eP 07.6 d

Tmax 09:47:32 . Tmax 31

Tmax 09:46:02

C&GS card 28,·,64:

08:55:2208

56.7° N., 151~9° Wo

h about 25 km

Magni.tude 5 1 (CGS).

Mar. 28

u Z

Hi Z

U Z

Pa Z

Ha Z

Tmax 08:38:26

Mar. 28

Mar~ 28

Pa Z

C&CS card 28-64:

08:33:47.0

58.1° N~, 151G1° w.

h about 25 km

Magnitude 5.25-5,5 (Brk),

5* 6 (cas).

C&GS card 28-64:

07:59:40.7

57.9° NQ, 150.3° w~

h about 25 km

Magnitude 4.4 (CGS)~

Mar~ 28

C&GS card 28-64:

09:05:56.4

56.6° No, 153~2° w.

h about 25 km

Magnitude 5.. 3·

C&GS card 28-64:

09:01:00u5

56.5° No, 152.00

w.

h about 20 km

Magnitude 6~2 (-Pas), 5~5-5.75

(Brk), 6eO (CGS)c

•

t.

Tmax 09:52:17

Tmax 09: 52 :16

Tmax 09:51:56

Tmax 09: 50: 49

Mar. 28

u Z

Pa Z

Hi Z

Ha Z

iP 08:41:10e7 c

iP 09.4 c

Pa Z Tmax 08:47:20

u Z

Pa Z

Mar. 28

M Z

U Z

Pa Z

Ha Z

iF 08 :47:14'b 0 c

Tmax 09:27:27

Tmax 27

T max 09 2 5 53

C&GS card 28-64: o8:39:54~9

57,5° N~, 151.6° w.

h about 20 km

Magnitude 5~4 (CGS)*

28
Table 5. Distant earthquakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks

Mar. 28

U Z Tmax 10:20:21

Pa Z Tmax 10:20:19

Hi Z Tmax 10:20:00

Ha Z Tmax 10:18:47

C&GS card 28-64:

09:34:01.5

56.8° N., 152.3° w.

h about 20 km

Magnitude 5. 0 :( cas).

Mar. 28

U Z Tmax 11 :27: 30

Hi Z Tmax 11:27:15

Ha Z Tmax 11:26:17

C&GS card 28-64:

10:35:31.2

60.9° N., 143.7° w.

h about 25 km.

Magnitude 5.1 ~CGS).

Mar. 28

eP 10:42:52.6 d

iP 52.1 d

Tmax 11:22:43

Tmax 11:22:29

Tmax 11:22:07

Tmax 11 :21: 05

u Z

Pa Z

U Z

Pa Z

Hi Z

Ha Z

eP 10:00:34.7 c

eP 33.6 c

eP 32.0 c

Tmax 10:43:41

Tmax 10:43:17

Tmax 10:42:20

March 28

M Z

Pa Z

Hi Z

Pa Z

Hi Z

Ha Z

C&GS card 28-64:

09:52:5507

59.7° N., 146.6° w.

h about 30 km

Magnitude 6.2 (Pas), 5-5.25

(Brk), 5.5 (eGs).

C&GS card 28-64:

10:35:38.9

57.2° N., 152.4° w.

h about 33 km

Magnitude 6.3 ~Pas), 5.75-

6 (Brk), 6.0 (CGs).

March 28 Mar. 28

C&GS card 28-64:

10:17:48.5

56.6 N., 152.2 w.

h about 15 km

Magnitude 5. 1 ,( CGS ) .

Mar. 28

C&GS card 28-64:

10:57:18.1

60.6° N., 144.7° w.

h about 33 km

Magnitude 4.7.

Mar. 28

u Z

Pa Z

Ha Z

Tmax 11:04:20

Tmax 11:04:15

Tmax 11:02:42

Pa Z

Pa Z

Tmax 11:48:45

Tmax 11:46:25

C&GS card 28-64:

10:33:00.2

57.7° N., 152.2° w.

h about 35 km

Magnitude 5.2 (CGS).

u Z

Hi Z

eP 10:40:19.1 c

eP 16.0 c

29

C&GS card 28-64:

10:59:16.3

57.4° N., 151.6° w.

h about 30 km

Magnitude 5.2(CGS).
Table 5Cl--Distant earthquakes--Continued

The Good Friday A1as~an Earthquake and its aftershocks

Mar~ 28

C&GS card 28-64:

12:03:16c5

60~3° N" 146~6° We

h about 15 km

Magnitude 5»1 {Pas), 5,,4 (CGS)~

u Z iP 12:27:59.4 c

Pa Z iP 58.2 c

Hi Z iP 56~8 c

u Z Tmax 13:07:07

Pa Z Tmax 13:07:08

Hi. Z Tmax 13 :'06: 42

Ha Z Tmax 13:05:38

C&GS card 28-64:

11:08:26.0

60z1° N~, 148r.4° W.

h about 15 km

Magnitu,de 5.6 (Pas), 5!· 25-5· 5

(Brk)} 5~7 (eGs).

t.

eP 13:08:57~7 c

eP 56~6 c

eP 55~4 c

Tmax 13:52:22

Tmax 13:52:13

Tmax 13: 51: 58

Tmax 13:50:46

Tmax 13:20:21

Tmax 13:20:18

Tmax 13:18:46

Mar~ 28

C&G·S card 28..,64:

13=01:14£2

60~lo N., 147.0° w.

h about 20 km

Magnitude 5·t 1 (eGs}..

Mar" 28

M Z iP l4:02:15.4 c

U Z .Tmax 14:48:17

Pa Z Tmax 14:48:09

Hi Z Tmax 14:47:48

Ha Z Tmax 14:46:24

C&GS card 28 ·-64 :

13:54:19-9

62~10 N~, 147.1° W~

h about 15 km

MagnitlJ.de 4.. 6 {cas).

C&GS card 28-64:

12:31:29.8

59~1° N~, 149R6° w.

. h about 20 km

Magnitude 4.7 (cas).

u Z

Pa Z

Hi Z

U Z

Pa Z

Hi Z

Ha Z

Mar. 28

U Z

Pa Z

Ha Z

.Mar., '28 - -Continued

C&GS card 28-64:

12:20:49.8

56m5° N~, 154~Oo w~

h abo\l.t 25 km

Magnitude 6~5 (Pas), 5.25-5075

(Brk), 6.1 (CGS).

3

iP 11:39:50.3 d

iP 11:16:15~1 d

13.6 d

12 .. 0 d

Trnax 11 :59 :38

eP 12:11:03~6 d

iP 01~1 d

Tmax 12:56:50

Tmax 12:56:46

Tmax 12:56:24

Tmax 12: 55: 01

z

Mar~ 28

M

C&GS card 28-64:

11:32:19····0

59.0° N9, 149.5° We

h about 20 km

Magnitude 4~9 (CGS)~

Mar~ 28

Mara 28

U Z

Pa Z

Hi Z

Pa Z

u Z

Hi Z

U Z

Pa Z

Hi Z

Ha Z

.'"
Table 5.--Distant earthquakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks

Mar. 28

U Z Tmax 15:32:42

Pa Z Tmax 15: 32 :47

Hi Z Tmax 15: 32 :21

Ha Z Tmax 15:30:55

C&GS card 31-64:

14:46:33.6

56.7° N., 153.6° w.

h about 33 km

Magnitude 4.9 (CGS).

Mar. 28

~r. 28

U Z Tmax 17:13:46

Pa Z Tmax 17:13:38

Ha Z Tmax 17:12:21

C&GS card 28-64:

16:26:16.9

5705° N., 150.9° w.

h about 30 km

Magnitude 5.0 (cas).

Mar. 28

C&GS card 28-64:

14:47:37.1

60.4° N., 146.5° w.

h about 10 km

Magnitude 6.3 (Pas), 5.75-

6 ,~Brk), 6.5-

6.75 (Pal),

5. 7(eGG).

C&GS card 28-64:

16:44:35.9

59.3° N., 147.8° Wo

h about 25 km

Magnitude 4.75-5 (Brk),

5.3 (CGS).

u Z

Fa Z

Hi Z

U Z

Pa Z

Hi Z

Ha Z

iP 14:55:25~0 c

iP 24.3 c

iP 22.3 c

Tmax 15:39:14

Tmax 15:39:11

Tmax 15:38:32

Tmax 15=31,:20

u Z

U Z

Pa Z

Hi Z

Ha Z

Mar. 28

Pa Z

eP 16:52:12.1 c

Tmax 17:35:14

Tmax 17:34:47

Tmax 17 :34 : 32

Tmax 17: 33 :22

Tmax 18:52:45

C&GS card 28-64:

14:49:13.7

60.4° N., 147.1° w.

h about 10 km

Magnitude 6.5 (Pas), 5.5-5.75

(Brk), 5.8 (cGS).

Mar. 28

U Z

Pa Z

Hi Z

U Z

Pa Z

Hi Z

Ha Z

iP 14:57:00.9 d

iP 14:56:59.7 d

eP 14:56:58.2 d

Tmax 15: 40 : 50

Tmax 15: 40 : 56

Tmax 15:40:27

Tmax 15:39:30

31

C&GS card 28-64:

18:02:54.9

59.5° N., 149.3° w.

h about 33 km

Magnitude 4.6.

Mar. 28

U Z iF 20:36:45.5'd

Pa Z iP 44.7 d

Hi Z iF 42.3 d

Ha Z eP 37.6 d

U PEZ is 20:42:57

U PEE eG 20:45:45

U PEZ iR 20:47:39

U Z Tmax 21:20:22

Pa Z Tmax 21:20:18

Hi Z Tmax 21:19:59

Ha Z Tmax 21:19:02
Table 5.--Distant earthguakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks,

Mar~ 28--Continued 'Mar~ 29--Continu.ed

C&GS card 29..,64:

01:29:33M7

57,5° N., ,151~ 30Wo

h about .20 km

Magnitude 4.6 (Pas), 5.75-6

(Brk), 5.6 (CGS)&

C&GS card 28-64~

20:29:08.6

59~8° N., 148.7° w~

h about 40 km

Magnitude 6,,6 (Pas)" 6·.5-6. 75

(Brk, Pal), 5.8 (CGS)} 6~ 6 (HVO).

Mar. 28

11 Z Tmax 00:34:09

Pa z· Tmax 00:33:55 . Hi Z Tmax 00:33:31

Ha Z Tmax 00:32:21

Mar., 29

u Z

Pa Z

Hi Z

Ha Z

Tmax 02:34:31

Tmax 02:34:22

Tmax 02:34:06

Tmax 02:32:52

C&GS card 28-64:

23:46:22.0

57~5~ N., 151.1° w.

h about 33 km

Magnitude 5~0 (Pas),

5e 5-5~ 75 (Brk),~

5~ 2 (eGs)

C&GS card 29-64: 01~48:18~5

56~3° N., 15377° W~

h about 20 km

Magnitude 4.8 (CGS).

Mar~ 29

Mar. 29

Pa Z Tmax 00:59:09

C&GS card 29-64

00:12:3233

56e8° N~, 153.4° w?

h about 33 km

Magnitude 4.5 (CGS)c

C&,C·S card 29-64:

01:09:36,,4

59.8° N. J 149~2° w~

h about 20 km

Magnitude 5,~2 (Pas), 5.,25-5.5

(Brk): 5~5 (Pa1j,

5c 5 (cGS).

'Ilmax 02: 54 :09

Tmax 02:54:09

Trnax 02: 53 :43

Tmax 02:52:38

Tmax 03:12:25

Tmax 03:12:21

r7

.LJ

Z

C&GS card 29-64:

02:07:4106

56~5° N~, 152.6° w.

h abol1t 20 km

Magni.tude 4,,5 (CG'S).

~1ar., 29

C&G!.S card 29-·64: 02:25:25~1

57~0° N., 151~7° w,

h abou.t 20 km

Magnitu,de 5·.. 2 (CGS) ,0

u Z

Pa Z

Hi Z

Ha Z

TJ

Pa

z eP 01:17:16~4 c

Mar.. 29

M

Mar~ 29· Mar~ 29

u Z

Pa Z

Hi Z

Ha Z

Tmax 02:17:05

Tmax 02:17=05

Tmax 02:16:42

Tmax 02~15:42

u z

u Z

Pa Z

Hi Z

iP 04:20:01.9 c

Tmax 05:03~45

Tmax 05:03:42

Tmax 05:03:23

3
Table 5.--Distant earthquakes--continued

The Good Friday Alaskan Earthquake and its aftershocks

Mar. 29--Continued Mar. 29

Ha Z Tmax 05:02:18 C&GS card--Continued

C&GS card 29-64:

05:13:42.4

59.5° N., 147.4° w.

h about 33 km

Magnitude 3.9 ~CGS).

C&GS card 29-64:

05:08:25.8

56.7° N., 152.7° w.

h about 20 km

Magnitude 4.6 (CGS).

C&GS card 29-64:

04=51:53.3

56.8° N., 152.4° w.

h about 40 km

Magnitude 4.8.

C&GS card 29-64:

04:12:15.7

60.2° N., 145.5° w.

h about 15 km

Magnitude 5.2 (Pas),

4.75-5 (Brk),

5.3 (CGS).

Tmax 07:39:23

Tmax 07:39:20

Tmax 07:38:00

Tmax 06:24:21

Mar. 29

U Z

Pa Z

Ha Z

h about 20 km

Magnitude 4.4 (eGs).

C&GS card 29-64:

06:53:19.5

56.1° N., 154.5° w.

h about 25 km

Magnitude 408 (CGS).

Mar. 29

U Z eP 06:11:48.7 c

U PEZ is 06:17:34

U PEE iG 06:20:10

U PEZ iR 06:21:50

U Z Tmax 06:50:49

Pa Z Tmax 06:50:46

Hi Z Tmax 06:50:22

Ha Z Tmax 06:48:58

CWS card 29-64:

06:04:44.5

56.1° N., 154.3° w.

h about 30 km

Magnitude 5.8 (Pas), 5.25-5.5

{Brk), 6-6.25 (Pal),

5.6 (CGG).

C&GS card 29-64:

05:37:47.4

56.9° N., 153.3° w.

h about 25 km

Magnitude 4.8.

Mar. 29

Pa Z

Tmax 06:08:24

Tmax 06:04:21

Tmax 05: 54 : 50

Tmax 05:38:29

Tmax 05:38:35

Tmax 05:38:05

Tmax 05: 36: 56

Mar. 29

Mar. 29

Pa Z

Mar. 29

Fa Z

Fa Z

Mar. 29

u Z

Fa Z

Hi Z

Ha Z

t.

C&GS card 29-64:

05:21:09.8

57.1° N., 150.4° w. 33
Table 5.--Distant earthquakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks

Mar. 29'. 1964 Mar", 29~-Continued . .

Pa Z Tmax 08:04:51 C&GS card 29-64--Continued

C&GS card 29-64:

07:18:08.0

57.0° N~, 151~8° Wu

h about 25 km

Magnitude 4~ 8 (CGS).

56.7°N., 152.1° w.

h about 33 km

Magnitude 403 (CGS).

Mar. 29

Mar. 29 Pa Z Tmax 09:53:09

M Z

U Z

Fa Z

Hi Z

Ha Z

eP 08:00:00.2 d

Tmax 08:38:59

Tmax 08:38:32

Tmax 08:38:37

Tmax 08:37:13

C&GS card 2.9--64:

09:06:44~8

56~6° N., 152.2° Wv

h about 15 km

Magnitude 4.8.

C&GS card 29-64:

07:52:46.4

56~1° N., 154.2° w.

h about 25 km

Magnitude 409 (Pas), 4.8 (CGS). C&GS card 31-64:

09:15:55~4

58.4° N~, 150.5° W.

h about 15 km

Magrlitude 4,,6 .(cds).

Mar~.' 29

M z eP 09:23:29.2 d

Pa Z Tmax 08:52:21

C&GScard 29-64:

08:07:52e3

56.5° N~, 152~6° w.

h about 20 km

Magnitude 4G9 (CGS).

C&GS card 29-64:

08:06:03.7

56~6° N~, 152.4° w.

h about 25 km

Magnitude 4~5 (CGS)~

Mar" 29

Pa Z Tmax 09:36:25

C&GS card 29-64:

08:50:03CJ6

eP 10:57:05.2 c

Tmax 11:37:39

z

Mar., 29

C&GS card 29~64:

10:49:40,,3

58.2° N~, 150.4° w.

h about 25 km

Magnitude 5~2 (CGS)_

Mar. 29

C&GS card 29-64:

10:08:02.4

60.0° N~, 148.6° w~

h about 20 km

Magnitude 5~0,t(Pas), 5.25-5~5

(Brk), 5.3 (CGS).

M Z

Pa Z

1J

·4

Tmax 08 : 54 :08

Tmax 08:54:05

Tmax 08:52:38

Mar~ 29

u Z

Pa Z

Ha Z
Table 5.--Distant earthquakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks

Mar. 29, 1964 Mar. 29--Continued

C&GS card 29-64:

12:48:05.9

59.9° N., 145.6° w.

h about 25 km

Magnitude 4.5 (CGS).

C&GS card 29-64:

11:56:33.0

58.0° N., 151.6° w.

h about 20 km

Magnitude 5.1 (CGS).

Mar. 29

Mar. 29

h about 15 km

Magnitude 4.9 (Pas), 5.0 (CGS~.

Marl» 29

U Z eP 16:48:41.8 c

Pa Z eP 41.2 c

Hi Z eP 39.Q c

Ha Z eP 33.8 c

U PEZ eS 16:55:06

U PEE eG 16:58:08

U PEZ iR 16:59:50

U Z Tmax 17:31:47

Pa Z Tmax 17:31:52

Hi Z Tmax 17:31:33

C&GS card 31-64:

16:40:57.9

59.7° N., 147.0° w.

h about 15 km

Magnitude 5. 8 ~(Pas), 5. 5-5.75

(Brk), 5.6 (CGS)o

eP 12:03:56.5 c

Tmax 13:39:22

Tmax 13:39:19

Tmax 13:38:59

Tmax 13:37:59

M z

u Z

Pa Z

Hi Z

Ha Z

Pa Z Tmax 16:25:17 Mar. 29

Mar. 29

C&GS card 29-64:

15:39:28.6

5601° N., 154.4° w.

h about 25 km

Magnitude 4.2 (CGS).

C&GS card 29-64:

16:09:15.3

60.3° N., 146.6° w.

h about 15 km

Magnitude 4.8 (CGS).

U Z Tmax 17:10:05

Pa Z Tmax 17:09:59

Hi Z Tmax 17:09:39

C&GS card 29-64:

16:18:29.3

60.4° N., 146.0° w.

eP 16:53:15.4 d

Tmax 17:36:26

Tmax 17:36:29

Tmax 17:36:01

U Z iP 17:01:14.3 c

Hi Z iP 11.5 c

U Z Tmax 17 :44 : 58

Pa Z Tmax 17:45:10

Hi Z Tmax 17:44:40

Ha Z Tmax 17:43:46

U Z

U Z

Pa Z

Hi Z

Mar. 29

C&GS card 31-64:

16:45:33.6

59.8° N., 146.9° w.

h about 20 km

Magnitude 4.75-5 (Pas),

6.25 r,(Pa1), 5.3 (CGS).

C&GS card 29-64:

16:53:26.6

60.3° N., 146.1° W.

35 h about 15 km

Magnitude 4.75-5 (Brk), 5.2 \CGS).

Z eP 16:17:02.8 d

Mar. 29

u

t
Table 5~ --Distant eatthquakes-:-Continued

The Good Friday A1aska,n Earthquake and its after,shoc~s

Mar. ~9, 1964 Mar. 22~~Continued

C&GS card 29-64:

17:26:00.2

56~4° N~, 153k3° Wn

h about 33 km

Magnitude 4.1 (CGS).

Mar-.r 30

C&GS card 29-64:

19:09:03.3

60.1° N , 146.0° W~

h about 15 km

Magnitude 486 (CQS).

C&GS card 29-64:

23:49:28.6

59.9° N" 147.1° W.

h about 20 km

Magnitude 4., 8 (CGS} t

Pa Z

Mar. 29

Pa Z

Hi Z

Ha Z

Mar. 29

M Z

Hi Z

Ha Z

Tmax 18:12:18

Tmax 20:00:26

Tmax 20:00:08

Tmax 19 : 58 : 57

iF 23:57:10~7 d

Tmax 00:39:45

Tmax 00:38:55

C&GS card 30-64:

02:18:06.3

56.6° N.,., 152.9° W.

h about 25 km

Magnitude 6.6 (Pas), 6.5-6c75

(~rk), ~r75 {Pal},

5.8 (CGS).

Mar. 30

U Z Tmax 03:28:20

Pa Z Tmax 03:28:15

Hi Z Tmax 03:28:01

Ha Z Tmax 03:26:52

C&GS CARD 30-64:

02:41:59.6

5605° N., 153.0° W.

h about 30 km

Magnitu.de 4.9"

Mar. 30

u Z Tmax 05:13:29

Pa Z Tmax 05:13:17

Iii Z Tmax 05:12:57

Ha Z Tmax 05: 11: 54'

C&GS card 30 -64 :

04:22:43~1

59.5° N~, 146~3° w~

h about 15 km

l~gnitude 4~5 (CGS)~

U Z eP 02:25:18,,2 c

Pa Z eP 17~0 c

Hi Z eP 15~4 c

Ha Z iP 11~0 c

U PEN is 02:31:16

U PEZ iR 02:35:00

U Z Tmax.P3~04:25

Pa Z Tmax 03:04:31

Hi Z Tmax 03:04:04

Ha Z Tmax 03:03:05

Mar. 30

u Z eP 07:17:18.2 c

Pa Z iP 17.4 c

Ha Z iP 08.8 c

U PEZ is 07:23:32

U PEN i 07:26:58

U PEZ iR 07:28:12

U Z Tmax 08:00:49

Pa Z Tmax 08:00:52

Hi Z Tmax 08:00:27

Ha Z Tmax 07: 59:31

36
Table 5.--Distant earthquakes--Continued

The' Good Friday Alaskan Earthquake and its aftershocks

Mar. 30--Continued Mar. 30--Continued

C&GS card 30-64:

07:09:34.0

59.9° N., 145.7° w.

h about 15 km

Magnitude 6.2 (Pas), 5075-6 (Brk)

6.25-6. 5 (Pal),

5.6 -{eGs).

C&GS card 30-64:

10:59:27.6

58.4° N., 149.2° w.

h about 25 km

Magnitude 5.0 (CGS).

Mar. 30

C&GS card 30-64:

08:40:10.7

56.5° N., 153.0° w.

h about 20 km

Magnitude 4.3 (cGS).

C&GS card 30-64:

07:56:29.1

56.3° N., 154.4° w.

h about 20 km

Magnitude 5.0 (CGS).

Mar. 30

C&GS card 30-64:

11:48:40.4

56.4° N., 152.5° w.

h about 20 km

Magnitude 5.2 (cas).

Mar. 30

C&GS card 30-64:

12:05:43.5

60.1° N., 147.0° w.

h about 25 km

Magnitude 5.0 (Pas), 5.0 (CGS).

Mar. 30

eP 12:13:27.0 c

Tmax 12: 56 : 51

Tmax 12:56:43

Tmax 12: 56 : 33

Tmax 12: 55 :29

eP 11:55:51.2 c

Tmax 02:35:10

Tmax 02: 35: 01

Tmax 02:34:44

Tmax 02: 33 :27

M Z

U Z

Pa Z

Hi Z

Ha Z

M Z

U Z

Pa Z

Hi Z

Ha Z

Tmax 10:14:14

Tmax 10:14:21

Tmax 10:13:55

Tmax 10:12:55

Tmax 09:26:32

Tmax 09:24: 56

Tmax 08:42:34

Tmax 08:41:40

Mar. 30

u Z

Pa Z

Hi Z

Ha Z

Pa Z

Ha Z

Mar. 30

Pa Z

Ha Z

C&GS card 30-64:

12:14~'28.4

58.0° N., 151.6° w~

h about 25 km

Magnitude 5.0 (cas).

t C&GS card 30-64:

09:23:05.0

59.9° N., 145.6° w.

h about 33 km

Magnitude 4.5 (CGS)G

Mar. 30

M Z eP 12:21:41.1 c

Ha Z Tmax 11:46:17

37
Table 5~ --Distant earthquakes--Continued

The Good Friday Alaskan Earthquake a.YJ.d its aftershocks

Mar. 30, 1964--Continued Mar ". 30--Continued

C&GS card 30-64:

12: 38·: 16" 0

59~7° N0' 146~9° Wr

h about 30 km

Magnitude 5.0 (CGS)~

C&GS card 30-64:

15:07:490)3

58M7° N., 149~6° We

h about 25 km

Magnitude 5. 3 (CGS) ..

C&GS card 30-·64:

13: 32.:'18.5

564>4° N~, 152.60W.

h abo·ut 15 km.'

~1agni tude 4" 8 (CGS).

u Z

Pa Z

Hi Z

Ha Z

Mar. 30

u Z

Fa Z

Hi Z

Ha Z

Tmax 13;29:07

Tmax 13:29:06

Tma.x 13: 28 39

Tmax 13:27:41

Tmax 13:45:54

Tmax 13~45:59

Tmax 13 :45: 37

Tmax 13:44:41

Mar. 30

M Z

Mar. 30

eP 15:15:27.1 d

C&GS card 30-64:

12:55:124>5

59~7° N., 147~0° W~

h about 30 km

Magnitude 406 (CGS)e

Hi Z

U Z

Pa Z

Hi Z

Ha Z

iP 16:16:36~5 c

Tmax 16: 56 :02

Tmax 16: 55: 55

Tmax 16: 55 : 34

Tmax 16:54:35

Mar. 30

M Z

U Z

Pa Z

Hi Z

Ha Z

eP 13:10:45~7

Tmax 13: 50: 08

Tmax 13:49:55

Tmax 13: 49 : 4-7

rrmax 13 48 :35

C&GS card 30-64:

16:09:28.4

56.6° Nft' 152~1° w~

h about 25 km "

Magnitude 5~5 (Pas), 5.5-5·75

(Brk), 5.75-6 (Pal),

5.5 I{CGS).

C&GS card 31-64:

13:03:34.9

56~5° 'N., 152~7° W.

h about 20 km

Magnit'ude 5.. 3 (eGG), 4,,75-

5 (Brk), 5Q5-5e75

(Pal), 5.3 (cas) Q

u Z Tmax 14:18:45

Pa Z Tmax 14:18:35

Hi Z Tmax 14~18:20

Ha Z Tmax 14, :17: 11

Mar.. 30

u Z Tmax 17:30:51

Pa Z Tmax 17:30:35

II.i Z Tmax 17:30:11

Ha Z Tmax 17:29:16

C&{}S card 30-64:

16:38:26~5

60~1° N~, 150.7° W~

h about 15 km

Magnitude 4.4 (cGS).

Mar~, 30

~.

u z Tmax 17:39:48
Table 5.--Distant earthquakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks

Mar. 30--Continued Mar. 31~-Continued

Mar. 30

C&GS card 30-64:

16:53:07.7

56.6° N., 152.2° w.

h about 15 km

Magnitude 5.0 (CGS).

C&GS card 30-64:

17:16:06.7

59.6° N., 146.5° w.

h about 33 km

Magnitude 4.3 (CGS).

Fa Z Tmax 17:50:47

Ha Z Tmax 17:49:19

C&GS card 31-64.:

17:04:21

56.7° N., 152.5° W.

h about 33 km

Mag~itude 4.3, (CGS).

Tmax 12:39:50

Tmax 12:40:07

Tmax 12:39:37

Tmax 12: 38 :33

iP 11:11:06.2 c

eP 04.6 c

Tmax 05:33:44

Tmax 05: 33 :21

Tmax 05: 32 :12

Mar. 31

u Z

Pa Z

Hi Z

Ha Z

Mar. 31

C&GS card 30-64:

11:03:35.4

58.9° N., 149.9° w.

h about 20 km

Magnitude 5.0 (CGS).

C&GS card 30-64:

04:46:06.1

57.6° N., 151.2° w.

h about 33 km

Magnitude 4.7 (CGSJ.

u Z

Pa Z

Mar. 31

Pa Z

Hi Z

Ha Z

h about 20 km

Magnitude 4.7 (CGS).

Tmax 18:05:18

Tmax 17:39:35

Tmax 17:39:18

Tmax 17:38:11

Mar. 31

Mar. 30

Ha Z

Pa Z

Hi Z

Ha Z

C&GS card 30-64:

01:57:54.3

57.6° N., 150.1° w.

h about 20 km

Magnitude 4.8 (CGS).

Ha Z Tmax 02:44:17 C&GS card 34-64:

11:53:14.4

56.5° N., 152.3° w.

h about 25 km

Magnitude 4.8 (CGS).

Mar. 31

C&GS card 30-64:

02:43:3506

56. 7° N., 15'4,-.'0° W.

C&GS card 31-64:

12:53:43.6

56.7° N., 152.2° W.

h about 33 km

Magnitude 4.3 ,eGs).

Mar. 31

Pa Z

Ha Z

Tmax 03:29:49

Tmax 03:27:56

39

Pa Z

Ha Z

Tmax 13:40:07

Tmax 13:38:39
Table 5~--Distant earthquakes--Continued

The Good Friday Alaskan Earthquake and its aftershocks

M z iP 21:11:27.7 c

C&GS card 30-64:

21:04:01.1

58.2° N., 150~3° W~

h about 20 km

Magnitude 5" 2 (CGS).

40

,,'
Table 6.. --u:s" Geological Survey seismograph stations in Hawaii

Location

Station

Uwekahuna

(Hawaiian

Volcano

Observatory)

Mauna Loa

Ahua

Desert

North Pit

West Pit

Makaopuhi

Hila

Kipapa Oahu

Symbol

u

M

A

D

N

WP

MP

Hi

Kip

Latitude

N.

19°24r9'

19°24,,7'

Longitude

W.

155°23.3'

155°15.9'

155°23.3'

155°17.5'

155°10.7'

Altitude

(m)

above sea

level

1,240

2,010

1,070

815

1,115

1,115

885

20

Equipm

(Z, vertical; N

E, ea

Long-period Press-E

(Seismometer and 

periods are 15 an

respectively. )

Short-perigd Spr

HVO -1: Z .!./

Short-base liquid

Remote recording H

Do.

Do.

Do ..

1.0 sec. Benioff w

pre-amplifier: Z

HVO-2 recording

HVO-l: Z.

Wood-Anderson: N

Sister Thecla at 

School,

HVO-l: Z. Operate

and Geodetic Surve
Table Geological Survey seismograph stations in Hawaii

Location

+:-

f\)

Station

Naalehu

Pahoa

Kamuela

Haleakala, Mau.i

North Bay

Installed

3/12/64

Kealakekua

Installed

1/28/64

Symbol

Na

Pa

Ka

Ha

NB

Ke

Latitude

N. Longitude

155°55·3'

Altitude

(m)

above sea level

205

205

740

2,090

4,005

505

Equipm

(Z, 

E, ea

1.0 sec. EV-17 sei

galvanometer: Z. 

Rev. D. Thompson 

School"

HVO-l: Operat

at Pahoa School.

Z. Operat

Van Gorder, Prep

Kamuela"

HVO-l: Z. Wood-A

Operated by the 

Haleakala Nation

0.8 sec. EV-17: Z

Operated by 

1.0 sec. EV·-17, 0.

z. Wood-Anderso

by H. Nelson 

Hospital.

See footnotes at end of table, p.43
Table Geological Survey seismograph stations in Hawaii--Continu

HVO-l is a moving-coil, hinged, vertical-component seismograph with seismom

galvanometer periods of 0-5 second. Over-damping of both seismometer and galvanome

control the strong galvanometer reaction. This seismograph has a peak magnification 

about 20,000 at a period of 0.25 second. Recording is optical, on photographic pap

g;/ HVO-2 is a moving-coil, vertical-component seismograph with a seismometer p

0.8 second. Its signal is transmitted over telephone wires to the Hawaiian Volcano 

where it is recorded on smoked paper. The response of seismograph is similar 

HVO-l_ Records from these seismographs at M, A, and D, and at N, WP, and MP (Benio

recorded on two 3-component drums to permit more accurate comparison of arrival tim
The following persons or agencies reported "felt" earthquakes during

the first quarter, 1964. Their assistance is gratefully acknowledged~

Kila'uea summit area

Mr.) and Mrs·. G" Yong

1'frrs. w. !'ftJ.st

Mrlt H. Powers

Mrs~ C. Wentworth

Mrs 11 V. Hansen

Miss M~ English

Mr. W'l Cuske lly

Mr, R41 Koyanagi

Mr~ A., Yamamoto

Mrs.. O.~ Duncan

Mr~ J.. Forbes

North Hawaii

Honokaa Police Dept.

Mrs. R. Eklund

lfITs~ P e Christensen

Mrs. P ';l Richards

Mrs. A. Walker

Mr. E. Van Gorder

MrB41 E. Lindsey

Hila region

Mr0 R. Baldwin

Mr~ C. Shoemaker

Mr~ J, Bryan

lJIr.. H;; Pierce

Mrs~ B. Shaffer

Mrr, ·W. SOllthward

Mrs C Guerin 0

Miss E,~ Patten

~rtrs. II., Lewis

I~s. C, Hubbard

Miss R~ Chiquita

Puna

MrQ R., Williamson

MrS,. D" Isbell

Y.tr:~ H.,. Warner

Ntr.. K.., Kirr~ura

Kau

Mrs~ P. Billings

Mrs & A~ Pai-rIa

44
UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY,.

HAWAIIAN VOLCANO OBSERVATORY

Sl.JlV1MARY 34

April, May, and June 1964

by

Arnold T. Okamura, Robert Y. Koyanagi

and Willie T. Kinoshita

Issued February 1965

Observatory Staff

Geology

Ho A. Powers (Scientist-in-charge)

D. L. Peck

Geophysics

D. P. Hi.ll

W. T. Kinoshita

George Kojima

R.. Y. Koyanagi

A. T. Okamura

Geochemistry

R. rr. Okamura

T. L. Wright

Support

E. T.. Endo

J. C. Forbes

W. H. Francis

B. J. Loucks

Akira Yamamoto
Chronological summary

Hawaiian volcanoes were exceptionally quiet during the second quarter

of 1964. From April 1 to May 15 no measurable tilting was indicated by

the short-base tiltmeter that is read daily~ During this span of time

there were a few bu~s of tremor (April 16 to April 22) and six scattered

earthquakes barely large enough to be felt. On May 23, in the Kaoiki

fault system, an earthquake of magnitude 3 was followed by 27 aftershocks

in less than 2 hours. A Kohala-centered quake of 3.5 magnitude was felt

on May 28. Two quakes were felt on June 4, the first at about 08h30m from

45 km depth under Kilauea, and the second at about l3h30m, from a shallow

quake on the southeast flank of Mauna Loa. Other quakes were felt on

June 8, 17, and 18.
Ki~ulo

!jay

EXPLANATION

• Seismograph Station

o Town or locality

Contour int.rval 1,000 fe.t

Dotum is meon seo Itvel

Topoorophy by US GeoloVical Survey

----.- 20°

Apua Point

Figure l.--Map of the island of Hawaii showing seismograph stations

operated by the Geological Survey and localities mentioned in the

text. Epicenters of local earthquakes are given in terms of

geographic coordinates, which are indicated at the edges of the map.

2
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 I 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, i.e., 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.

3
Table l.--Tilt coordinates at Uwekahuna Vault, April,

"May, and June 1964

Date N-S E-W Date E-W

Mar. 5 460 506 June 7 465 506

12 461 506 14 466 505

19 461 506 21 466 507

26 462 503 28 467 502

May 3 463 502

10 462 503

17 464 501

24 464 501

31 464 500

4

J
Second quarter, 1964

Table 2.--Tilt coordinates and changes at bases around Kilauea caldera (See tilt diagra

Tilt ba.se Date Tilt coordinates Rate (10-6 rad/mo

(location) (1964) and direction o

N-S E-W tilting since 

last reading 

Uwekahuna April 29 452.5 491.9 5.0 N. 43.3° w

(19°25.5' N. , 155°17.4' w. )

Tree Molds May 1 433.2 510.9 2.2 N. 19.3° w

(19°26.3' N. , 155° 17. 3' '-1.)

Sand Spit May 1 848.5 768.5 0.6 s. 25.7° E

(19°24.1' N. , 155° 16.8' w.)

Kalihipaa April 27 338.6 383.8 1.0 S. 45.0° w

(19°21.4' N. , 155°15.3' W.)

Keamoku April 28 495.8 591·9 2.7 N. 65.0° w

(19°25.1' N. , 155°19.0' w. )

Ahua Kamokuko1au Ma.y 1 620.3 532.3 3·5 s. 21.5° w

(19°22.7' N., 155°16.6' w.)

Kipuka Nene April 27 485.3 511.. 0 0.4 s. 84.3° E

(19°19.4' N., 155°16.7' W.)

Hilina Pa1i April 30 498.1 497.8 0.6 N. 79.8° w

(19°18.2' N., 155°18.6' W.)

Kapapa1a Ranch April 28 495.3 502.3 0.3 N. 83.5° w

(19° 20. 5' N., 155°23.8' w.)
cr

o

\

J

/

Kal

~W.kahuna

Kia

\.

\ \

J )

Kap

•

~.......-t

"H~~~./' N· . d TILTING RATE 2.5 X 10-6 RADIANS / MONTH

/?// JAN 22, 1964 - APR 27, 1964 I o I I

SKM

2000

Figure 2.--Tilting of the ground around Kilauea caldera, January 22 to

April 27, 1964. 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 circles,

short-base water-tube tiltmeters.

6
Seismic summary.--Events recorded by the U.S. Geological Survey

seismograph network in Hawaii fall into two categories: local earthquakes

and tremor originating in the region of the Hawaiian Islands, usually

within 100 km of at least one seismograph, and 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 3. The earthquakes

are separated into groups on the basis of region of origin as determined by

analysis of records obtained daily at the Observatory (U, M, A, D, N, WV,

MP). Earthquakes of magnitude 2.5 or greater are generally sufficiently well

recorded to be located with greater precision; they are listed individually

in table 4. Data on identifiable phases from distant earthquakes are

listed in table 5.

Locations of the seismograph stations and essential data on the

stations are listed in table 6, of summary 33.

7
Table of earthquakes and minutes of tremor recorded on seismograph

U, M, A, D, NJ WP, and MP around Kilauea caldera

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

amplitudes on seismographs in the summit region. Unless otherwise stated, tremor 

be associated with movement of magma within the central complex of Kilauea.

Earthquake categories are: Halemaumau rock slides, which are detected by the characte

they produce on the North Pit seismopgraph; shallow earthquakes in the Kilauea calde

shallow earthquakes along the SW. rift zone of Kilauea and the adjacent portion of th

fault system; earthquakes along the eastern half of Kilauea's east rift zone--detect

on the Pahoa short-period vertical; earthquakes from a source about 30 km beneath Ha

earthquakes from the upper east rift zone and the adjacent fault systems of Kilauea'

flank (these are usually first arrivals at the Abua meter or at the newexperimentals

near Makaopuhi Crater (MP)); and earthquakes from other regions: Kona, Mauna Kea, e

Tremor

(in minutes) Earthquakes

(1964)

Inter- Hale- SW. rift Eastern I Hale- Uppe

.-

Deep media.te Shallow maumau Kilauea and East maumau Eas

slides caldera Kaoiki rift 30 km rif

Apr. 1 ---,.-.- ----..,--- ------ 70 8 - -=-- 8 7 

2 19 -----=--- ------- ------ 82 6 1 1 9 

3 -_.-:_- ------- ------- 1 85 6 1 1 3 

4 ___ t-...-_ -------=- ------- ___ e::- ___ 64 22 11 9 

5 .-_----- _____ 5$ 12 ---- 6 3

6 ___ ___ ca.t=- 73 12 _ __ IE:' 2 3 

7 ... _-- e.:.- _____ ... 52 16 ---- 13 2 

8 ---- ... 39 ? 5 ... 5 5 
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs

U, M, A, D, N, WP, and MP around Kilauea caldera--Continued

Date Tremor

(1964) (in minutes) Earthquakes

Inter- Hale- SW. rift Eastern Hale- Upper

Deep mediate Shallow maumau Kilauea and East maumau East 

slides caldera Kaoiki rift 30 km rift

9 ------ 44 3 ------.... 2 5

10 ------ 56 15 ------ 1 3

11 ------- 1 39 9 ------.... 3 1 ----

12 ------ 37 15 1 3 1 1 Ma13 ------ 51+ 30 1 3 4

14 ------ 48 19 3 8 1 2 Ko

1 ne

15 1 48 4 3 3

\0 16 ------ 45 12 -----.... 3 ? ----

17 ------ 35 11 2

18 75 ------ 40 16 4 6 ----

19 ------ 44 13 1 14 1 1 ne

20 40 ------ 66 12 3 3 2 Ko

21 -"_-=::I ... 59 16 -----_.. 4 2 2 Ma

22 27 --- --- 76 12 1 8 2 1 Ma

23 ___ c:.-_«:I:» 46 12 _.a ___. __ 4 3 ----

24 58 4 ------ 1

25 --- - - -- 48 18 ------ 14? ----26 ____ E.-_ 49 5 5 6 ----

27 ------- 48 8 ------ 3 2

28 56 ------- 64 4 =-=------ 2 429 52 9 ca _____ 2 1 2 Ko

30 ------ 40 8 _C:lt _____ 1 2 1 Ko

May 1 ------ ----- - 40+ 4 ------ 3

2 ------- 40 9 ------ 4 6

3 ------ 39 13 1 8 2

4 ------ 32 6 ------ 2 5 1 Ko
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs

U, M, A, Dt NJ WP,. and ME' around Kilauea caldera,--Continued

Earthquakes

Tremor

(in minutes)

Deep

Date

(1964 Inter- Hale- SW. rift Eastern Ha1e- Upper

mediate Shallow maumau Kilauea and East maumau Eastslides caldera Kaoiki rift 30 km rift

I-'

o

May 5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

2'3

24

25 t326 37

27

28

29

30

3

5

3

60

60

3

46

48

46

40

54

39

42

35

46+

58

50

67

43

52

40

40+

39

3330

30

40

42

85

62

58

57

10

5

10

5

10

7

20

12

11

1314

22

12

37

15

-8

40

5

32

8

7

9

10

7

8

'8

1

4

1

1

10

8

2

3

6

3

10

4

3

3

3

2

9

5

4

3

1.

2

2

6

2

3

2

8'

3

2

3

2

4

3+

3

3

1

2

3

4

2+

1+

?

?

5

?

5

22

5

1

1 

1 

1

1 

1 

2 

1 

1 

1 

1

3 

2 

1 
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs

U, M, A, D, N, WP, and MP around Kilauea caldera--Continued

Date Tremor

(1964) (in minutes) Earthquakes

Inter- 8W. rift Eastern Hale- Upper

Deep mediate Shallow maumau Kilauea and East maumau East 

slides caldera Kaoiki rift 30 km rift

May 31 32 60 8 2 1 Ma

1 ne

June 1 2 53 8 3 1 Ko

2 15 6 65 9 3 3 1 Ma

3 60 8 3 2

4 60 4 2 2?

5 53 12 3 5?

6 1 54 8 3 2 1 Ko

J-l 7 38 51 6 10 1 Ma

8 9 52 5 3 3 1 Ma

1 off 

Ha

9 10 54 7 5 2

10 71 7 1 1 1711 5 58 9 1 2 Ma

12 4 57 4 1 2 1

13 40 4 1 1 2

14 31 35 6 1 1 13 1 Mau

15 53 8 1 3

16 36 10 ------

17 37 4 4 1 2 Kon

reg

18 62 11 1 1

19 60 7 2 2

20 65 9 2 5

21 65 8 2 2 1 1 Ko

22 60 7 3 123 6 53 8 1

24 72 16 3 3 1 Koh

25 70 21 __ 2
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs

Uj M, A, D, N; WP, and MP around Kilauea caldera--Continued

Tremor

Date (in minutes) Earthquakes

(1964) Hale""" SW. rift Eastern Ha;le- Upper

Deep mediate Shallow maumau Kilauea and East maumau East 

slides caldera Kaaiki rift 30 km rift

June 26 ---- ____ c:. __ -------- 67 17 2 11 

27 35 13 --.-- ---- 49 10 11 6

28 15 70 9 -=------- 6 5

29 ---- 9 ------- _._--- 46 6 2 4 

30 --.-. ------- ------- 67 11 ----- - -3 ------ 
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological Survey,

April, May, and June 1964

[Entries for a given quake are: date, origin time (Hawaiian Standard Time), magnitude, 

and felt report. All earthquakes of magnitude 2.5 and larger, as well as many favora

smaller ones, occurring on or near the island of Hawaii are included in the list.

In the following list, some origin times are followed only by 1fKM 30ft and a statement o

These are all members of a continuing family of quakes noted also in other Summaries. 

mean focus for this group is beneath Halemaumau at a depth of 30 km {19°24.l' N., 155

In the following list a number of quakes are described as fTUpper east rift fT (see Summar

average epicenter is approximately 19°21.5' N., 155°14' W. about 2 km south of Aloi C

near-surface depth.

The mean focus of the magnitude 6.1 Kaoiki fault system earthquake of June 27, 1962, an

is 19°24' N., 155°25' W., at a depth of 3-8 km. This focus has bee abbreviated 1fKaoi

Date Time Magni- . Depth' Epicenter 

(1964) t-l1de (km) 

h m s Lat. N. Long W. Description

- - -

April 1 02 ' 2B 53.0 3·9 ---- ....-...- ----------- Kaoiki----------------- 

! 

2 00 47 2.4 8 19°16.1' 155°13.8' 4 km vJNW of Apua Point

2 05 41 57.4 2.0 ---- ----------- KM 30------------------2 22 18 51.0 2.9 ---- --------- ------------ Kaoiki----------------- 

3 10 07 25·5 2.7 8 19°48' 156°09' 40 km NW of Kealakekua3 18 04 54.5 3 19°21.7' 155° 08.0' 5 km E. of Makaopuhi

4 17 39 08.5 205 3 19°54.0' 155°54.0' 17 km NNE of Pohakuloa

5 01 00 00.2 2.0 ---- _c:r:ao __ ___ -=:_------- KM

6 04 19 22.0 3 19°19.0' 155°10.2' 6 km S. of Makaopuhi--

7 11 45 57·5 2.3 8 155°22.2' 32 km WNW of Hilo-----

7 19 03 24.5 2.3 1I:ol»a:. __ .:3I1C:3I ___ ee. __ --------- KM 30-----------------

8 07 39 49.5 2.5 13 19°32.1' 155°37.1' 7 km NW of North Bay

seismometer..

9 08 02 40.1 2.1 3 19°17.7' 155°11.9' 9 km SSW of

10 19 13 09·5 2.7 ---- --------- KM

10 21 50 32.7 2.1 3 19° 18.5 f 155°09.3' 8 km SSE of Makaopuhi

11 03 29 53.3 2.5 ---- _______ e:t ------=--- Kaoiki---------------11 19 51 01·5 2.4 13 19°13.7' 155°29.8' 3 km NW of Pahala----
Table 4,. -=oooIJocal earthquakes recorded by seismographs of the lT. S .. Geological Survex

April, May, and June 1964--Continued

Date Time Depth Epicenter, 

(1964) tude (km) 

h .'. m s Lat# N.. Long. w. Description

- - -

April 12 05 43 5 200 13 19°44.. 5' 155°26.3' 9 km ESE of Pohaku1oa 

12 19 29 08.8 2 .. 0 8 19°1788' 8 km S. of Makaopuhi

14 02 45 20004 2D2 3 19°26.5' 155°52.9' 9 km SSE of Kealakekua14 05 41 54.0 8 19° 5" 7 km WSW of Kalapana14 13 08 31e9 3.-0 __ KM 

14 13 23 o4Q3 KM 30----------------

14 14 02 44.0 2.6 13 19° 33' 155° 58' 7 km NW of Kealakekua 

18 09 22 19·5 2e6 ---'=-'-- -=--- -- --------- KM 30---------------- 

19 00 48 32r5 2.5 3 19°20.8' 155°03 .. 1' 8 km WSW of Kalapana

19 03 51 5180 2.0 3 19°1ge7' 155°05.9' 10 km ESE of Makaopuhi

19 21 39 10eO 2!2 3 19°18.8' 155°04.3' 14 km ESE of Makaopuhi'

20 06 04 04 .. 0 288 3 19°40.8' 155°53.9' 18 km NNE of Kealakeku 

20 14 07 13.0 3.4 < 3 19°25' 156°01' 17 km SW of Kealakekua 

21 09 58 35.5 2.2 13 19°07.5' 155°29.7' 12 km NE of Naalehu--- 

21 20 49 32.3 2.7 3 19°12.8' 155°35.0' 17 km N. of Naalehu--- 

22 14 08 13.5 2.5 3 19°13.6' 155° 33. 3 ' 18 km NNE of Na.alehu 

26 00 44 '50.0 2.9 3 19°18e9' 155°11.8' 8 km SSW of Makaopuhi 26 10 20 39.6 2.9 3 19°21.8' 12 km E. of Makaopuhi 

28 05 32 16.7 2.5 ---- -------- --------- KM 30---------------- 

28 06 27 15.9 3.2 ---- -------- --------- Kaoiki--------------- 

28 15 33 53.0 2·5 3 19°17.8' 155°06.1' 12 km SE of Makaopuhi 

30 01 26 42.3 2.5 3 19°19.4' 155°08.0' 8 km SE of Makaopuhi 

30 04 23 08.0 2.8 3 19°27.4' 155°57.8' 8 km SW of Kealakekua 

May 2 17 55 33.5 2.4 8 19°16.8' 155°11.8' 10 km SSW of Makaopuhi 

3 02 40 58.5 8 19°20.2' 155°05.2' 10 km ESE of Makaopuhi 

4 01 41 23.0 2·9 3 19°27.0' . 155°58.2' 9 km SW of Kealakekua

7 22 58 54.0 2.3 5 19°18.0' 155°15.5' 9 km S. of Ahua 

seismometer.

8 03 44 42.0 3 19°13.2' 155°15.2' 18 km S. of Ahua 

seismometer.

8 13 36 20.0 2.7 13 18°54' 155.0 30' 22 km SSE of Naalehu

9 07 56 2.6 -------- -------- Kaoiki--------------- 
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological Survey,

April, May, and June 1964--Continued

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

-

h m s Lat. N. Long. w. Descripti on

-

.

- -

May 9 15 53 23.0 2.6 ---- -------- --------",,-- KM 30---------------- 

9 18 40 13.3 2.6 30 19°22.2' 155°19.8' 7 km NE of Desert 

seismometer.

10 11 03 48.0 2.7 35 19°26.8' 156°02.2' 15 km SW of Kealakeku11 03 45 51.3 2·5 ---- ----_-._- --------- KM 30----------------

11 06 39 25·5 2.1 ---- -------=-- --------- KM 30----------------

11 11 46 39·5 2.6 ---- ______ e-_ --------- Kaoiki---------------

11 16 19 06.2 2.1 ---- -------- -=--------- KM 30----------------11 21 00 11.0 2.4 8 19°16.3' 155°09.2' 5 km ENE of Apua Poin

11 22 42 01.7 2.6 ----- -------- --------- 

12 20 14 56.0 2.2 ---- -------=-- --------- Kaoiki---------------

14 02 28 51.1 2.3 5 19°19.0' 155°09.6' 7 km SSE of Makaopuhi 14 10 13 12·5 2 .. 0 ..- ---------- --------- KM 30----------------

14 16 05 02.9 2.3 10 19°23.9' 155°15.8' 2 km N. of Ahua 

seismometer.

15 05 49 17.5 2.4 .3 19°19.0' 155°06.9' 10 km SE of Makaopuhi 

16 09 48 46.3 3.0 --=-_ ... --------- -------.:::.- Kaoiki---------------16 18 18 22.7 2·5 3 19°21.6' 155°08.0' 6 km E. of Makaopuhi 

18 03 47 19·0 2.7 3 19°22.8' 155°45.5' 23 km SE of Kealakekua 

18 07 32 56.5 2.9 --=--=--- _oc.- ______ --------- KM 30----------------18 11 00 11.5 2.8 13 20°03.5' 155°32.1' 15 km ENE of Kamuela 

seismograph.

18 11 02. 34.3 2.6 13 20°03.5' 155°32.1' 15 km ENE of Kamuela 

seismograph.

20 23 43 59·0 2.0 ---- -------- --------- KIY1 30--------------- 

22 11 51 23.3 3.0 8 19°32.2' 155°37.2' 7 km NW of North Bay 

seismometer.

22 14 21 29.2 2.7 13 19°29' 156°17' 40 km WSW of Kealakeku23 21 23 19·0 2.8 13 20°07.0' 155°50.4' 18 km NW of Kamuela 

seismograph.
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological Survey,

April, May, and June 1964--Continued

selsmometer.

Date Time Magni- Depth Epicenter 

(1964) . tude (km) 

h m s Lat. N. Long. w. Description

- - -

y 24 05 05 56.0 3.2 3 19°15.0' 155°24.4' 11 km SSW of Desert

seismometer.

24 05 28 " 2.6 3 19°10.9' 155°22.9' 18 km SSW of Desert

seismometer.

24 07 15 27e7 2.2 3 19°15,.1' 155°23.1' 12 km SCI of Desert

seismometer.

27 15 01 45.5 2.4 13 19°5398' 155':>29.0' 28 km SE of Kamuela 

; seismograph.

28 04 06 01·5 3.4 13 20°05.9' 155°50.3' 18 km WNW of Kamuela 

seismograph. 

29 05 04 56.6 2.3 3· _c:.r __ -=- __ c-. --------

30 20 57 56.5 2.2 5 19°32,,0' 154°52.9' 5 km NW of Kapoho--- 31 03 20 26.3 10 19°15.8' 155°06.5' 10 km E. of Apua

Point.

ill1e 1 03 14 43.0 2.7 10 20°05.8' 155°50.8' 17 km of Kamuela

2 00 16 :06.0 2.4 ----- -------- --------- KM 30---------------

2 21 05 37.2 2.5 40 19°54.3' 155°10.1' 10 km NW of Pepeekeo 

4 08 34 31.9 4.0 45 19°26.8' 155°16.8' 4 km NE of Uwekahuna 

seismometer.

.4 12 52 16e7 ---------

4 13 22 30.0 3.8 8 19'° 19. 2 t 155°05.2' 12 km ESE of Makaopuhi 

seismometer.

6 19 31 24.3 2.8 8 19°51c9' 155°44.8' 10 km W.. of Waikii----

6 20 04 03.3 - ---- ..------ ---------

8 03 36 14.4 2·5 8 19° 02. 8,' 155°27.6' 14 km E. of Naalehu

8 12 00 8 19° 37 e 8:' 155°25.1' 15 km NNW of Maill1a 

Loa seismometer.

9 02 15 07·1 2 ..8 8 19°22.6' 155°06.2' 9 km E. of Makaopuhi

seismometer.

10 05 04 28.5 2·5 13 19°20.. 2' 155°06.7' 5 km BE of Maiaopuhi

J

Ma
Table 4.--Local earth uakes recorded b seismo

April, May, and June

Geol0 ical Surve

selsmometerc

I

Date Time Magni- Depth Epicenter 

(1964 ) tude (km) 

h m s Lat. N. Long. w. Description

- - -

June 10 07 13 32.4 2.6 ---- --------- --------- KM 30---------------------- 

10 09 05 16.5 2.7 8 19°17.4 1 155°11.4 1 9 km S. of Makaopuhi 

seismometer.

10 22 45 34.9 2.0 10 19°24.5 1 155°05.6 1 11 km NE of Makaopuhi 

seismometer.

11 14 10 37.7 2.3 35 19°12.7 1 155°31.9 1 6 km WNW of Pahala 

14 05 05 38.5 2.2 _c-. __ KM 30-------------=-- 

14 10 58 22.0 2.4 8 19°10.8 1 155°31.9 1 14 km NNW of Naalehu 

14 11 23 14.4 2.7 ---- __ _____ --------- Kaoiki---------------14 16 38 15.2 2.6 8 19°18.9 1 155°11.6 1 5 km SSW of Makaopuhi

seismometer.

15 03 25 31.6 2.7 10 19°16.7 1 155° 08.1 1 11 km SSE of Makaopuhi

seismometer.

16 12 04 40.7 3.1 13 18°54.0 1 155°35.6 1 18 km S. of Naalehu 

17 00 48 20.0 2.0 3 19°27.1 1 155°46.2 1 17 km SE of Kealakekua

17 14 13 31.3 3.0 3 19°28.0' 155°50.6' 10 km SE of Kealakekua 

18 05 07 5808 3.2 50 19°4500' 155°05.2' 4 km N. of Hilo------- 

19 04 14· 43.6 2.5 25 19°12.2' 155°18.6' 18 km SE of Desert 

seismometer.

20 18 14 28.7 2.6 ---- _____ c.- ___ ------_..... Kaoiki----------------

21 05 23 10.3 2.1 10 19°19.0' 155°07.0' 10 km BE of Makaopuhi

seismometer.

21 11 23 34.3 2.6 8 19°43' 156°10' 12 km E. of Keahole.

Point.

22 17 30 32.8 2.9 ___ .:a __ ______ cm __ 

26 14 34 36.0 2.6 3 19°43.0' 155°41.9' 33 km NE of Kealakekua

26 15 36 33.5 2.9 3 19°15.5' 155°11.4' 1 km SE of Apua Point26 18 56 08.1 2.1 10 19° 18.1' 155°10.9' 7 km S. of Makaopuhi

seismometer.

26 20 52 54.1 2.7 10 19°18.7' 155°11.4' 6 km SSW of Makaopuhi

-
'rable - -Local earthqriakes recorded by seismographs of the U. S. Geological Survey,

April, May, and June 1964"·-Continued

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h m s Lat4 N. Longp W" Description - - -

Jurle 27 07 02 50cO 2l.3 8 19" 19· 8' 10 km BE of Makaopuhi

seismometer"

27 13 07 r"\ '"'") a."r-r'.rw" n::'_ ..... __ l3» c::..,...J KM28 00 44 9 2cO 10 19°1708' 10 km SE of Makaopuhi

seismometer"

28 07 02 42,,2 2 .. 4 ____ KM 30--------------------29 08 56 c:r.;0'C!:I ____ __ ... __ ... KM 30--------------------

30 09 04 04.0 3.4 10 19°30.4' 155°50r9' 7 km Er of Kealakekua---- 
Table 5.--Distant earthquakes

[Times are reported in Greenwich Civil Time which is 10 hours faster

than Hawaiian Standard Time. A "c" following the time of P indicates

compressional first motion; a "d" indicates dilatational first motion.

Station symbols, locations, and instrumentation are presented in

summary 33. Magnitudes calculated from the Hawaii seismograms are

followed by (HVO). Location of epicenter, origin times, and focal

depth, and magnitude reported by other institutions are taken from

"Preliminary Determination of Epicenters" published by the U.S. Coast

and Geodetic Survey.

The high concentration of aftershock activity following the March 28,

1964, Alaskan earthquake necessitated a separate listing of these

events; and such is listed in the end of this table, as continued

from summary 33J

C&GS card 36-64:

01:44:50.3

36.4° N., 139.9° E.

Central Honshu, Japan

h about 67 km

Magnitude 4.7 {CGS).

C&GS card 32-64:

15:56:52.6

5.8° N., 1250w.

Mindanao, Philippine Islands

h about 179 km

Magnitude 5.7 (CGS).

April 5

April 2

M Z eP 16:08:34.6 c

A Z eP 34.9 c

D Z eP 34.3 c

U Z iP 37.4 c

Pa Z eP 39·2 c

NB Z iP 34.1 c

Hi Z iP 38.5 c

Ke Z eP 33.6 c

C&GS card 34-64:

10:58:09.1

45.8° N., 150.8° E.

Kuri1e Islands

h about 40 km

Magnitude 5.5-5.75 (Brk), 6.25-

6.5 (Pal), 5.5 (CGS),

6.1 (HVO).

April 7

M Z eP 13:30:25·9 c

A Z eP 26.3 c

D Z eP 25.3 c

MP Z eP 26.5 c

U Z iP 26.1 c

Pa Z eP 27.1 c

NB Z iP 25.1 c

Hi Z eP 27.3 c

Na Z eP 23.9 c

Ke Z iP 22.4 c

C&GS card 33-64:

13:18:18.9

0.1° N., 123.2° E.

Northern Celebes

h about 150 km

magnitude 5.9 (CGS).·

April 8

M Z eP 11:07:23 c

U PEE eS 11:14:37

U PEZ iSS 11:18:15

U PEE eG 11:19:10

U PEZ iR 11:21:30

19

Sumatra

01:54:36.0 c

01:39:38

01:45:18

01:55:38

M z iP

April 2, 1964

U PEZ ePS

U PEN eSS

U PEl\I eG

C&GS card 32-64:

01:11:55

5.90N., 95.70w.

Near coast of Northern

h about 132 km

Magnitude 5.2 (CGS).
Table 5. --Distant .earthg.uakes-·-Continued

C&GS card '35-64:

16:18:54

8.6° S., 117.3° E.

Sumbawa Island region

h about 58 km

Magnitude 5. 3 (CGS).) .

C&GS card 35-64:

13:43:08.9

52.1° N., 169.4° w.

Fox Islands, Aleutian Islands

h about 33 km

Magnitude 4.9 (CGS).

April 13--Contihued

C&GS card--Continued

6.9° N., 126.6° E.

Near east coast of Mindan.ao.,

Philippine Islands

h about 110 km.

C&GS card 35-64:

01:04:34.5 ,

37.0° N., 142.7° E.

Off East coast of Honshu, Japan

h about 38 km

Magnitude 5.1 (CGS)o

April 16

l6:31:53.6 d

01:14:23.8 c

14:00:46

iP

Z eP

z

PEZ eR

April 16

April 14

u

M

M

April 11

M Z iP 01:13:19.7 c

A Z iP 19~5 c

u Z iP 19.6 c

Pa Z iP 20.9 c

NB Z eP 20.0 c

Hi Z eP 22.4 c

C&GS card 33-64:

01:04:30.2

2980° S., 178.9° Ws

Kermadec Islahds

h about 302 km

Magnitude 5.3 (CGS).

April 12

M Z iP 11:20:40.8 c

A Z iP 40.3 c

D Z iP 11:20:39~6 c

MP Z eP 40.1 c

U Z eP 40.3 c

Pa Z eP 42 c

NB Z iP 40.3 c

Hi Z iP 42~9 c

Ke Z iP 39.5 c

Ha Z iP 46.7 c

C&GS card 36-64':

11:10:54.8

33~9° S~, 179.8° w,

Kermadec Islands

h about 89 km

Magnitude 5~4 (CGS)w

April 13

M Z eP 08:54:49.3 d

A 'Z eP 50.0 d

D Z eP 49.3 d

C&GS card 33-64:

08:45:24.6

2203° N~, 142e1° Ee

Bonin Islallds region

h about 309 km

Magnitude 5 1 (CGS)~.

C&GS card 35-64:

14:05:14.9

7.0° B., 155.7° E.

Solomon Islands

Felt: Kieta & Omori

h about 78 km

Magnitude 5.4 (CGS).

April 13

M Z iP'

A Z iP

C&GS card 33,-64:

11:26:52.1

11:38:3430 d

34.3 d

20

April 16

M Z

D Z

Na Z

eP

eP

eP

14:14:59.4 d

58.4 d

56.3 d
Table 5.--Distant earthquakes--Continued

April 17, 1964

C&GS card 35-64:

06:00:00.2

6.6° S., 154.9° E.

Solomon Islands

Felt: Buin & Omori

h about 85 km

Magnitude 5.4 (CGS),

6.4 (RVO).

April 24

M Z eP 06:06:36.2 d

D Z eP 35.5 d

Pa Z eP 39.2 d

NB Z iP 36.1 d

Hi Z iP 38.7 d

Na Z iP 34.9 d

Ke Z eP 33.0 d

U PEZ i 06:07:06

U PEN is 06:15:14

U PEE iG 06:22:26

U PEZ iR 06:25:14

C&GS card 39-64:

05:56:10.1

5.1° S., 144.2° E.

North-East New Guinea

h about 106 km

Slight damage at Hagne

Felt widely

Magnitude 6.5-6.75 {Brk),

6.3 (CGS), 7 (HVO).

April 23--Continued

Ke Z iP 23.3 c

U PEZ iPP 03:47:33

U PEZ iPPP 03:49:28

U PEZ is 03:54:11

U PEZ iSS 03:59:08

U PEZ iSSS 04:02:38

U PEN iG 04:04:19

U PEZ iR 04:07:16

C&GS card 36-64:

03:32:50.3

5.3° S., 134.0° E.

Aru Islands region

h about 33 km

Felt: Darwin, Australia

Magnitude 6.4 (cas),

6.8 (HVO).

03:44:26.8 c

26.6 c

25.7 c

26.5 c

28.5 c

25.6 c

28.5 c

20:09:09.9 d

09.5 d

08.7 d

12.3 d

14:41:10

14:47:24

14:03:18

06:09:27.4 d

26.6 d

29.4 d

26.9 d

29.7 d

24.5 d

24.7 d

07:08 :08,

iP

iP

iP

iP

eP

iP

iP

iP

eP

iP

iP

iP

iP

eP

iP

iP

eP

iP

Tmax

Z

Z

Z

Z

C&GS card 36-64:

20:00:22.8

15.5° S., 167.5° E.

New Hebrides Islands

h about 123 km

Magnitude 5.0 (CGS).

April 23

M Z

A Z

D Z

U Z

Pa Z

NB Z

Hi Z

M

A

NB

Ra

April 22

April 19

U PEZ ePS

U PEZ eSS

U PEZ eR

C&GS card 35-64:

14:12:21.9

60.5° S., 58.3° S.

Near South Shetland Islands

h about 33 km

Magnitude 5.4 (CGS).

M Z

D Z

Pa Z

NB Z

Hi Z

Na Z

Ke Z

Ke Z

21
Table 5.--Distant earthquakes--Continued

07:09:38

07:21:26

07:25 :26

16:13:06.0 d

16:21:11

16:26:53

16:29:09

17:14:09

M Z Tmax 13:12:50

A Z Tmax 51

D Z Tmax 51

u· Z Tmax 35

Pa Z Tmax 25

NB Z Tmax 50

Hi Z Tmax 09

C&GS card 38-6'4:

14:40:28.3

13.3° NA' 88ft8° w.

Near coast of E1 Salvador

h about 158 km

Magnitude 6 (Pal), 5.1 ·(CGS).

08:27:27'

08 :31: 51

08:33;59

08:08:15.7 c

17.6 c

15.9 c

16.5 d

17.0 c

14.1 c

16.1 c

15.6 d

12.0 c

08:08:07.3 c

08:16:31

08:22:47

08:24:51

16:20:04.0 d

, 0.4.8 d

16::27:25

16:32:15

16:34:31

May 7

M Z iP

A Z eP

D Z eP

U Z iP

Pa Z eP

NB Z iP

Hi Z eP

Na Z eP

Ke Z eP

Ha Z eP

U PEE is

U PEN iG

U PEZ iR

C&GS card 40-64:

07:58:14.3

40.4° N., 139.0° E.

Off coast of northern Honshu,

Japan.

Felt: Northern Honshu and

Hokkaido.

h about 33 km

Magnitude 7 .(Pas), 7 (Brk),

6.5-6.75 (Pal),

6.2 (CGS), 7.1 (HVO).

May 2

M Z' iP

. U Z eP

U PEN is

U PEN iG

U PEZ iR

, C&GS card 38-64:

16:11:00.2

45.5° N., 150.3° E.

Kurile Islands

h about 35 km

Magnitude 5.7 (cas), 6.6 (HVO).

May 6

U PEZ eS

U PEN eG

U PEZ eR

C&GS"card 38-64:

08:10:47.5

11.1° S., 162.2° E.

Solomon Islands

h about 40 km

Magnitude 5. 1--(CGS ), 5. 6 (HVO).

22 (HVO ).

April 24, 1964

M Z eP 14:50:50.1 c

A Z iP 49.6 c

D Z iP 50.0 c

u Z iP 49.9 c

NB Z iP 52.9 c

Hi Z eP 49.3 c

April 27

U PEN ePS

U PEE eG

U PEZ eR

C&GS card 39-64:

06:44:25.1

60.1° S., 15100° E.

Balleny Islands region

h about 33 km

Magn.itude 5.0 (CGS), 6. 0 (HVO).

April 28

C&GS card 38-64:

12:21:25.6

59.0° N., 13807° w.

Near coast of southeastern Alaska

h about 33 km

Magnitude 4.6 (CGS)a

April 30

M Z eP

U PEN eS

U PEN eG

U PEZ eR

NB Z Tmax

C&GS card 42-64:

16:03:3104

4.6° Se, 153.2° E.

New Ireland region

h about 78 km

Felt: Londo1ovit, Rabau1

Magnitude 5.2 {CGS), 5.8
Table 5.--Distant earthquakes--Continued

C&GS card 40-64:

02:02:28.8

52.2° N., 169.6° w.

Adreanof Islands, Aleutian

IsJands

h about 25 km

Magn~tude 5.1 (CGS).

May 7

Ke Z iP 11:20:30.3 c

C&GS card 40-64:

11:11:04.9

30.6° N., 137.7° E.

Off south coast of Honshu, Japan

h about 469 km

Magnitude 5.1 (CGS).

11:08:44

11:15:37

11:17:33

05:35:08.7 c

08.6 c

08.8 c

05.0 c

05:43:05

05:52:27

Z Tmax 14:29:53

Z eP

Z iP

Z eP

Z eP

PEN is

PEZ iR

C&GS card 44-64:

05:25:26.1

32.8° s., 178.3° w.

Kermadec Islands region

h about 33 km

Magnitude 5.3 (CGS), 6.6 (HVO).

May 15

U PEE is

U PEN eG

U PEZ iR

C&GS card 43-64:

10:50:21

3.5° S., 149.1° E.

Bismark Sea

h about 44 km

Magnitude 4.7 (CGS), 5.9 (HVO).

May 10

C&GS card 42-64:

13:44:03

51.4° N., 129.2° w.

Vancouver Island region

h about 33 km

Magnitude 4~1 {CGS).

May 13

M

A

U

Ke

U

U

Pa

C&GS card 42-64:

05:39:42.6

29.0° N., 141.5° E.

Bonin Islantis region

h about 62 km

Magnitude 4.75-5 (Brk), 5.3

(CGS) .

May 10

M Z iP 05:49:29.6 c

D Z iP 29.8 c

U Z eP 30.1 c

NB Z iP 28.4 c

Hi Z eP 30.7 c

Ke Z iP 25.7 c

23

02:09:16.3 c

02:17:59

23:52:59

23:56:17

20:22:50.0 d

20:31:07

20:35:03

20:37:09

20: 39:23

C&GS card 38-64:

23 :4

1

0 : 44. 1

52.2° N., 169.5° w.

Adreanof Islands, Aleutian

Islands

h about 20 km

Magnitude 5.2 (CGS).

May 9

M Z eP

U FEZ eR

C&GS card 38-64:

20:12:49.3

40.5° N., 139.0° E.

Off west coast of Honshu, Japan

Minor damage in Akita Province

h about 33 km

Magnitude 5.9 (CGS), 6.5 (HVO).

May 8

U FEZ eS

U FEZ eR

May 7

M Z eP

U PEN is

U PEZ eBB

U PEN iG

U PEZ iR
Table 5.--Distant earthquakes-~Continued

May 16) May 20

C&GS card 44-64:

16:07:46.2

32.8° S.) 178.3° w.

Ke'rmadec Islands region

h about 33 km

Magnitude 6.0 (Pas), 5.4,-(CGS),

6 (HVO) 3

May 18

M Z eP 14:20:26~3 c

C&GS card 43-64:

14:12:10.1

21.2° S., 174.5° w.

Tonga Islands region

h about" 33 km

Magnitude 4~5 (Brk), 5.,6 (CGS).

May 17

U PEZ ePS 19:53:59

U PEZ eSS 19: 58': 51

U PEN eG 20:08:07

U PEZ eR 20:13:33

C&GS card 45-64:

19:26:20.6

35.2° N., 35.90w.

North Atlantic Ocean

h about 33 km

MagnitU.de 6~,5 (Pas) j 5.75-6 (Brk) ,

6-6.25 (ral), 5.6

(C9S)" 6'.4 (HVO).

l~: 57:15'

09:50:27.3 c

27.8 c

26.8 c

28.3 c

27.5 c

11 :'3'1: 58.1 c

58.0 c

58.3 c

59.8 c

56(,9 c

54.5 c

06 :12 :09 e 9"C

08$ 9 c

,09.8 'c

12.6 c

06.2 c

May 23

M Z iP

D Z iP

lJ Z eP

Pa Z eP

NB Z iP

Ke' Z iP

C&GS card 43-64:

11:22:33.3

28.6° N." '139.4° ET"

Bonin Islands region

h about 409 km

Magnitude 5.1 (CGS).

May 24

U PEZ eR

e&Gs card 43-64:

10:31:24~1

34c3° N. J 141.1° Eo

Near east coast of Honshu,

Japan

h about 33 km

Magnitude 5~ 2 (CGS).

May 26

M Z iP

A Z iP

D Z iP

MP Z iP

U Z iP

C&GS card 43'-64:

09:40:57.9

16.5° N., 145.9° E.

Mariana Islands region

h about 94 km

Magnitude 5. 5 {.CGS).

M Z eP

D Z eP

U Z iP

Hi Z eP

Ke Z eP

C&GS card 43-64:

06:01:14.8

2.7° S., 139.'3° E

Near north coast of western

New Guinea

h about 61 km

Magnitude 5.8 (CGS) 8

24

23: 15,:,34.5 c

23:25:~5

23:30:07

23:35:39

23:38:39

16:17:28.5 c

16:25:27

,16: 34:29

A Z eP

U PEE is

U PEZ eR

May 19

A Z eP

U PEE is

U PEZ eSS

U PEN" eG

U PEZ eR

C&GS card 43-64:

23:03:41,8

0070S., 80#2° W~

Near coast of Ecuador

h about 54 km

Magnitude 5" 5 (Pal), 5· 25-5. ,5

(Brk), 5.4 (CGS)..,

6.1 (lIVO).
Table 5.--Distant earthquakes--Continued

May 26--Continued

C&GS card--Continued

h about 120 km

Magnitude 7.5-7.75 (Pas),

7.5-7.75 (Brk),

7-7.25 (Pal), 7.6 ~HVO).

Ma.y 29

M Z iP 19:10:13.3 c

A Z iP 12.7 c

MP Z iP 12.6 c

U Z iP 12.8 c

C&GS card 46-64:

19:01:57.0

2601° So, 178.3° E.

Fiji Islands region

h about 613 km

Magnitude 40 1 (cas).

May 30

M Z iP 14:40:33.0 c

U Z eP 33.6 c

NB Z eP 32.3 c

Hi Z eP 34.1 c

Na Z eP 33.7 c

Ha Z eP 24.0 c

U PEE is 14:48:34

U PEZ eSS 14:52:28

U PEZ iR 14:57:04

C&GS card 43-64:

14:30:45.3

3602° N., 141.1° E.

Near east coast of Honshu,

Japan.

h about 49 km

Magnitude 505-5.75 (Pal),

5.4 (CGS), 6.0 (HVO).

May 26, 1964

M Z ip T

A Z ePT

D Z eP'

l\1P ZiP'

U Z ePT

Na Z iP'

Ha Z iP'

U PEZ eP

U PEZ ipP

U PEZ ip T

U PEZ ipP'

U PEZ iPP

U PEZ isPP

U PEZ i

U PEZ ePPP

U PEN eSKKS

U PEN eS

U PEN i

U PEZ iPS

U PEN ipPS

U PEZ isPS

U PEE i

U PEE iSPP

U PEZ iSKKP

U PEZ i

U PEZ i

U PEE i

U PEZ i

U PEN" iSS

U PEN isSS

U PEN i

U PEE i

U PEE iSSS

U PEE i

U PEZ i

U PEZ i

U PEZ i

U PEN iG

U PEN i

U PEN i

U PEZ i

U PEZ i

U PEN i

U PEN i

U PEN i

U PEZ i

C&GS card 46-64:

10:59:12.3

56.2° S., 27.8° w.

Sandwich Islands

11:18:0600 d

05.4 d

05.6 d

04.9 d

05.5 d

04.9 d

07.7 d

11:14:53 c

11:15:21 c

11:18:09

11:18:38

11:20:06

11:20:48

11:21:58

11:22:56

11:25:54

11:27:46

11:29:36

11:30:18

11:30:42

11:30:54

11:31:04

11:31:18

11:31:43

11:32:18

11:33:26

11:34:48

11:35:23

11:36:54

11:37:46

11:39:48

11:40:38

11:42:00

11:45:14

11:46:21

11:48:24

11:49:26

11:51:30

11:54:48

11:56:54

11:57:56

12:02:38

12:04:23

12:06:43

12:10:48

12:13:00

25

May 31

M Z

A Z

D Z

U Z

Pa Z

NB Z

Hi Z

Na Z

Ke Z

Ha Z

eP 00:49:55.5 d

eP 56.8 d

eP 55.8 d

eP 56.3 d

eP 57.3 d

eP 54.3 d

eP 55.9 d

eP 56.8 d

eP 52.0 d

iP 44.9 d
Table 5.--Distant earthquakes~-Continued

C&GS card 50-64:

18:26:54.5

9.~0 S., 117.6° E.

Sumbawa region

h about 33 km

.Magnitude 5~0 (CGS).

June 10

June 8~-Continued

C&GS card 46-64:

22,: 53 :21. 7

17.7° N., 145.7° E.

Mariana Islands

h about 163 km

Magnitude 5.4 (CGS).

June 10

M Z iP 22:28:21.9 d

A Z iP 22 .. 1 d

D Z eP 21.4 d

MP Z iP 23.0 d

u Z eP 22.0 d

NB Z iP 20~7 d

Hi Z eP 23.9 d

Ke Z eP .19.9 d

·Ha Z eP 16.7 d

U PEZ ipP 22:28.:45

U PEZ isP 22:29:06

U PEZ i 22:51:38

C&GS card 49-64:

22:16:44.8

5.0° N., 127.4° E.

Talaud Islands region

Felt: Gen. Santos &

Hinatuan, Philippines

h about 146 km ,

Magnitude 5.5 (C~S), 6~o (RVO).

June 11

M Z iP 17:12:40.3 c

C&GS card 47-64:

l7:0l:48~5

2.0° S., 140.8° E.

Near north coast of New Guinea

h about 18 km.

M Z iP 18: 39: 56.5 d

May 31, 1964--Continued

U PEE is 00:57:27

U PEZ iSS 01:01:10

U PEE eG 01:02:38

U PEZ iR 01:04:50

Ha Z Tmax 01:46:07

C&GS card 43-64:

00:40:36.4

43. 5° N., 146., 8 E.

Kurile Islands

h about 48 km

Magnitude 6~5-6.75 (Pal), 6~3

(eGs), 7.2 (RVO).

June 6

M Z iP 19:18:02.2,c

A Z iP 00.4 c

D Z iP 00.6 c

u Z eP 00.7 c

Pa Z eP 19:17:59.5 c

NB Z iP 19:18:03.5 c

Hi Z eP 01.8 c

Na Z eP 01.7 c

Ha Z iP 11,.1 c

M Z Tmax 20:23:56

A Z Tmax 57

D Z Tmax 56

U Z Tmax 54

Pa Z Tmax 35

NB Z Tmax 20:24:02

Na Z Tmax 20:23:44

C&GS card 46-64:

19:07:51.4

26.6° S., 114.4° w.

Easter Island region

h about 33 km

Magnitude 5.8 (CGS).

June 8

M Z iP 23:02:42.1 d

A Z eP 42.8 d

D Z iP 42.1 d

MP Z iP 23:02:43.3 d

U Z iP 42.5 d

Pa Z iP 44 .. 6 d

NB Z iP 40.2 d

Hi Z eP 43.5 d

Na Z iP 40.7 d

Ke Z iP 37·.8 d

26
Table 5e--Distant earthquakes--Continued

June 11, 1964 June 16

M Z iP 18:41:57.4 M Z iP 04:11:41.3 d

C&GS card 47-64: A Z iP 42.0 d

D Z iP 41.6 d 18:32:17.9 1:'@ Z eP 42.4 d 33.1° N., 137.6° E. u Z eP 41.9 d Near south coast of Honshu, Japan Pa Z eP 43.0 d h about 330 km NB Z iP 40.6 d Magnitude 4.8 (CGS). Hi Z eP 42.2 d

June 11 Ke Z eP 39.9 d

A Z Tmax 22:58:36 Ha Z iP 33.4 d

u PEE is 04:19:45 U Z Tmax 34 U PEZ iSS 04:2:3 :44 NB Z Tmax 53 U PEE iG 04:26:06 Ha Z Tmax 22:57:59 U PEZ iR 04:28:22

C&GS card 50-64:

22:18:19.8

40.3° N., 126.5° W.

Off coast of northern California

h about 33 km

Magnitude 5.4 (cas).

June 12

M

A

D

U

z

Z

Z

Z

iP

iP

eP

eP

16:07:57.8 d

58.1 d

57.3 d

58.0 d

C&GS card 51-64:

04:01:44.3

38.3° N~, 139.1° E.

Near west coast of Honshu, Japan

h about 57 km

25 killed, many injured, and

extensive property damage at

Niigata. 7 foot tsunami

along coastal areas

Magnitude 7025-7.5 (Pas),

7.25 (Pal),

6.1 (CGS), 7.5 (HVO).

C&GS card 48-64:

15:56:21.3

11.4° N., 124.9° E.

Cebu, Philippine Islands

h about 183 km.

Magnitude 5.5 (cas).

June 12

June 16

M Z

A Z

D Z

NB Z

Hi Z

iP

eP

iP

eP

eP

07:03:08.5 d

09.5 d

08.6 d

07.8 d

09.7 d

C&GS card 51-64:

07:14:57.1

27 38.5° N., 139.2° E.

C&GS card 51-64:

06:53:05.0

38.7° N., 139.0° E.

Near west coast of Honshu, Japan

h about 15 km

Magnitude 5.6 (CGS).

June 16

M Z iP 18:20:36.0 c

A Z iP 35.0 c

MP Z iP 35.1 c

U Z iP 35.1 c

Pa Z iP 36.1 c

NB Z iP 34.8 c

Ke Z iP 33.6 c

Ha Z iP 40.3 c

C&GS card 50-64:

18:12:20.5

26.5° S., 178.3° E.

South of Fiji Islands

h about 648 km

Magnitude 5.3 (eGs).

M

A

D

U

Pa

NB

z

z

Z

Z

Z

Z

iP

iP

iP

iP

eP

iP

07:24:59,,6 d

07:25:00.6 d

07:24:59.9 d

07:25:00.4 d

07:25:01.7 d

07:24:59.2 d
Table 5.--Distant earthquakes--Continued

June 16, 1964--Continued

C&GS card-~Continued

Near west coast of Honshu,

Japan.

h about 16 km

Magnitude 549 (CGS).

C&GS card 53-64:

03:03:37.9

10.4° S., 161.1° E.

Solomon Islands

h about 70 km

Magnitude 5.4 (GGS), 5.8 XHVO).

June 23

June 22

Z iP

Z iP

Z eP

Z iP

Z iP

Z iP

Z iP

Z iP

PEN is

PEZ iSS

PEN iL

PEE iG

PEZ iR

07:29:33~2 c

33.8 c

34r.3 c

33.4 c

33.0 c

34.1 c

31~5 c

33.5 c

13:01:31.9 d

27.1 d

13:09:35

13:13:29

13:14:53

13:17:47

14:03:43

35

43..

44

17

46

iP

iP

iP

eP

iP

iP

iP

iP

Z

Z

Z

Z

Z

Z

Z

Z

June 28

June 29

C&GS card 53-64:

07:21:32.8

62.7° N., 152.0° W.

Southern Alaska

Felt: College, Alaska

h about 33 km

Magnitude 5.6 (CGS).

M

A

D

U

Pa

NB

Hi

Ke

Hi Z eP

Ke Z eP

U PEN is

U PEZ eBS

U PEN iG

U PEZ iR

M Z Tmax

A Z Tmax

D Z Tmax

U Z Tmax

Ke Z Tmax

NB Z Tmax

C&GS card 53-64

12:51:34.6

1.7° S4' 149.6° E~

New Ireland region

h about 7 km

Magnitude 5-75-6 (Brk), 6.4

(~GS) .

June 30

03:12:42.4 d

43.3 d

42.3 d

43.0 d

42.0 d

49.5 d

03:20:04

03:27:22

04:07:55

04:08:13

04:08:19

01:35:59.0 c

5967 c

59.3 c

59.4 c

59.1 c

55.8 c

58.7 c .

49.1 c

01:43:34

01:47:23

01:48:15

01:48:30

01:50:50

iP

eP

iP

eP

eP

iP

is

iR

Tmax

Tmax

Tmax

z

Z

Z

Z

Z

Z

PEE

PEZ

Z

Z

Z

M

A

D

U

NB

Ha

U

U

Ke

NB

Ha..

M

MP

U

Na

Hi

Ke

NB

Ha

U

U

U

U

U

c&GS card 53-64:

01:26:37<;0

43.3° N~, 146.1° E.

Kurile Islands

h about 77 km

Magnitude 7 (Pas), 6.75-7 (Brk),

6~75 (Pal), 6.2 (CGS),

7.0 (HVO).

2

M

A

D

U

NB

Ke

Ha

U

lJ

U

Z iP

Z eP

Z eP

Z eP

Z eP

Z eP

Z eP

PEE epP

PF~ is

PEE iPPS

13:58:43,,3 c

4348 c .

43.2 c

43.4 d

40.9 c

40.1 c

48.,8 c

14:01:59

14:09:03

14:10:09
Table 5.--Distant earthquakes--Continued

June 30, 1964--Continued

U PEN eSS 14:14:17

U PEE eGSS 14:18:09

U PEN iG 14:20:29

U PEZ iR 14:24:01

C&GS card 54-64:

13:46:21116

O.8? Su., 122. 5° E.

Northern Celebes

h about 36 km

Magnitude 6.3 (CGG),

6.7 (HVO).

June 30

M

U

z

z

iP

eP

19:59:44.6 c

44.7 c

C&GS card 52-64:

19:47:22.5

0.0° N., 122.9° E.

Northern Celebes

h about 33 km

Magnitude 4.9 (CGS).

June 30

M Z iP 20:17:27.8 c

A Z iP 28.6 c

D Z iP 28.4 c

U Z eP 28.5 c

Pa Z eP 29.7 c

NB Z eP 26.9 c

Hi Z eP 28.2 c

Na Z eP 28.8 c

Ke Z eP 24.7 c

C&GS card 52-64:

20:08:28.5

46.6° N., 144.6° E.

Sea of Okhotsk

h about 383 km

Magnitude 5.5 {CGs).

29
April 1, 1964

Table 5.·--Distatlt earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

April 1

U

Ke

z

z

eP

iP

00:08:58.6 c

58.8 c

Pa

Ha

z

z

Tmax 14:42:01

Tmax 14:40:29

C&GS card 32-64:

00:01:10.6

60.4° N., 146~4° w.

h about 10 km

Magnitude 4.9 (CGS).

April 1

C&GS card 32-64.:

13:54:31.9

57.5° N., 151.3° W.

h about 20 km

Magnitude 4. 9 (CGS).

April 1

C&GS card 34-64:

03:23:17.2

57.2° N., 151.3° w.

h about 25 km"

Magnitude 5.25 (Pal), 5.1 (CGS).

C&GS card 32-64:

16:29:09.0

59.7° N., 146.5° W.

h about 15 km

Magnitude 4.7 (CGS).

April 1

U

Pa

Hi

Ha

z

z

z

z

Tmax

Tmax

Tmax

Tmax

04:10:47

40

11

04:09:02

NB

Ha

z

z

Tmax 17:19:48

Tmax 17:18:39

C&GS card 32-64:

04:49:26

57.2° N9, 15184° W.

h about 20 km

Magnitude 4.8 (CGS).

April 1

C&GS card 32-64:

20:07:24

56.6° N., 153.0° w.

h about 33 km

Magnitude 4~ 4 (CGS).

Pa

Ha

z

z

Tmax 05:36:20

Tmax 05:34:45

Pa

Ha

z

z

Tmax 20:53:38

Tmax "20: 51: 57

April 1

U Z Tmax 06:24:22

Pa Z Tmax 23

Hi Z Tmax 03

Ha Z Tmax 06:22:56

C&GS card 32-64:

05:33:02r.9

59.9° N., 146.0° W.

h about 15 km

Magnitude 405 (cas).

30
Table 5.-....Distant earthql.:.akesaa ...Continued

Aftershocks of the Alaskan earthquake of March 28 2 1964

April 2, 1964 April 2

C&GS card 32-64: 08~27:13.5

56.6° N., 152~4° w~

h about 33 km

Magnitude 4.3 (cGS).

C&GS card 32-64~

12~19:09

56.3° N~, 152.20W0

h abou.t 33 km

Magnitude 40 3 -( CGS)

Pa z Tmax 09=14:11 Fa

Ha

z

z

'I'max

Tmax

13~o6~12

13:04:47

I

C&GS card 32-64:

19:40:19.. 9

5946c N~, 144.8° w~

h about 20 km

Magnl.t·ude 4e 7 (CGSi)~

April 2

April 2

April 2

U Z Tmax 1o~44:16

Pa Z Tmax. 10~44:16

NB Z Tmax 10:44:03

Hi Z Tmax 10:43':48

Ha Z Tmax 10:42:46

C&GS card 32-64~

09:57:54e5

56.5° N., 152~8° We

h about 20 km

Magnitude 4. 9 (CG·S) e

Pa

Ha

z

z

Tmax

Tmax

20:31:29

20:30:00

C&GS card 32-64: 10~09~47eO

56. 7° N~" 152~6° w~ h about 33 km

Magnitude 402 (CGS)e

April 2

April 2

C&GS card 32-64:

20:09:42.0

59~8° No, 147~0° w.

h about 10 km

M.agnitude 5.0 (CGS)"

21~OO:38

20 58: 59

Tma.x

Tmax

z

z

Pa

Ha Tmax 10:56:07

Tmax 10:54:41

z

z

Pa

Ha

April 2

M Z eP 11:48:49.. 1 c

Na Z eP 51.0 c

Ke Z iP 49.. '2 c

Pa Z Tmax 12~4o~37

Hl Z Tmax 12:40:05

u Z Tmax 23:25:59

Pa Z Tmax 53

NB Z Tmax 52

Ke Z Tmax 42

Hi Z Tmax 29

Ha Z Tmax 23:24:23

C&GS card 32co64~

11~41:10,,7

58,,8° N., 149.6° Wo

h about 20 km

Magnit-l1de 5. 4 (eG·s}o

C&GS card 34".64~

22:34:31v7

59080N0~ 144.3° W.

h about 20 km

Magni.t1J-de 4c 75-5 (Brk) 5~ 75-

6 (Pal), 500 (CGS)o

31
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

C&GS card 32-64:

04:34:56.9

60.3° N., 146.5° W.

h about 5 km

Magnitude 5.0 (CGS).

April 4

April 3 April 4

u Z Tmax 09:30:10

Pa Z Tmax 09:29:56

NB Z Tmax 09:30:23

Hi Z Tmax 09:29:23

Ha Z Tmax 09:28:28

C&GS card 32-64:

08:38:42.8

59~6° N., 144.7° w.

h about 10 km

Magnitude 5.4 (cas).

M

Pa

Hi

z

z

z

iP

eP

eP

04:42:45.3 c

45.8 c

43.1 c

C&GS card 32-64:

06:53:25.9

60.4° N., 146.0° W.

h about 15 km

Magnitude 4.8 (CGS).

C&GS card 32-64:

04:54:01.7

60.1° No} 146.7° w.

h about 40 km

Magnitude 5.6 (CGS), 6.0 (HVO).

April 4

Z iP

Z eP

Z eP

Z eP

Z iP

Z iP

PEZ eS

PEZ iR

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

07:45:03

07:43:48

05:01:45.3 c

45.4 c

43.0 c

49.1 c

45.6 c

35.5 c

05:08:02

05:12:36

05:44:48

05:45:13

05:44:44

05:45:19

05:44:32

05:43:32

Tmax

Tmax

Z

Z

Pa.

Ra

M

Pa

Hi

Na

Ke

Ha

U

U

M

U

Fa

NB

Hi

Ha

April 3

u Z Tmax 09:37:50

Pa Z Tmax 33

NB Z Tmax 54

Hi Z Tmax 17

Ha Z Tmax 09:36:36

April 3

C&GS card 34-64:

08:46:27

57.9° N., 150.5° W.

h about l5 km

Magnitude 5~ 5 (CGS).

C&GS card 32-64:

22:33:42.2

61.6° N., 147.6° w.

h about 40 km

Magnitude 6 (Pas), 6.25-6.5 -(Pal)

5.25 (Brk), 5.7 (CGS)

5.8 (HVO).

M Z iP 22:41:35.6 d

U Z iP 36.0 d

Pa Z eP 35.0 d

NB Z iF 36.4 d

Ke Z iP 35.9 d

Ha Z eP 26.5 d

U PEN eS 22:48:14

U PEE eG 22:51:14

U PEZ eR 22:52:58

Pa Z Tmax 23:26:04

Ha Z Tmax 23:24:35

32
Tabel 5.--Distant earthquake--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

April 4, 1964

M Z eP 08:47~45.4 d

U Z eP 45.9 d

Na Z eP 48~1 d

U PEN eS 08:53~38

U PEZ iR 08 57: 38

M Z Tmax 09:27:00 .. U Z Tmax 09:27:00

Pa Z Tmax 09:26:47

NB Z Tmax 09:26:53

Hi Z Tmax 09:26:27

Ha Z Tmax 09:25:28

C&GS card 32-64:

08:40:29.8

56.5° N., 152.6° w.

h about 15 km

Magnitude 6.0 (Pal), 5. 3 (CGS).

April 4

M Z iF 09:l8:o8~6 d

U Z iF 09,,2 d

NB Z eP 09.1 d

Hi Z iP 06.0 d

Na Z iP 13.1 d

Ke Z iP 09.0 d

Ha Z eP 58.2 d

M Z Tmax 09~57:37

U Z Tmax 33

Pa Z Tmax 34

NB Z Tmax 44

Hi Z Tmax 14

Ha Z Tmax 09~56:o6

C&GS card 32-64:

09:l0:55~1

56.9° N., 152.7° w.

h abo·ut 15 km

Magnitude 5.75-6 (Pal), 5.9 (-CGS).

April 4

M Z Tmax 15~58:50

Fa Z Tmax 58

NB Z Tmax 15:59:29

Ha Z Tmax 15:57~39

C&GS card 32-64:

15:08:12e3 33

April 4-~Con.tinued

C&GS card-~Continued

59.6° N., 146~9° w~

h about 15 km

Magnitude 4.7 (CGS).

April 4

u Z eP 17:53:15.8 c

Na Z eP 18.7 c

Hi Z eP 13.0 c

U PEZ 'Clu 17~59:02

U PEN e(} 18:01~22

U PEZ eR 18 :02: 50

M Z Irmax 18:32:28

·u Z lrmax 23

Pa Z Tmax 22

]:\TB Z Tmax 31

Hi Z Tmax 18 :31: 58

Ke Z Tmax 18:32:39

Ha Z Tmax 18:30:42

C&GS card 32-64~

17~46:o8.6

56.3° N., 154.4° w~

h about 25 km

Magnitude 6.5 (Pas), 5-75-6

(Brk), 6.5-6e75 (Pal),

5.7 (CGS), 6.5 (HVO).

April 4, 1964

Hi Z iP 18:06~49.7 c

J)1 Z rr1max 18~46~oo

u Z Tmax 18:45:57

Pa Z Tm.ax 18:45:53

NB Z :rmax 18:46:00

Hi Z Tm.ax 18:45:40

Ha Z Tmax 18:44:37

C&GS card 34-64~

17:59:43-3

56.4° Ne, 154.5° w.

h about 25 km.

Magnitl~de 5.25 (Brk), 6c5-6,.75

(Pal), 5.5 (CGS)e
Table "5.--Distant earthquake--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

C&GS card 32-64:

22:16:54~5

59.4° N., 145.2° W.

h about 10 km

Magnitude 5~5-5.75 (Pal),

5~ 1 (CGS).

C&GS card 33-64:

01:22:13.3

56.2° N., 153~5° w.

h about 25 km

Magnitude 6-6c25 {Pal), 5.4 (cas),

6.2 (HVO).

April 4, 1964

April 5

M Z

U PEZ

U PEZ

M Z

U Z

Pa Z

NB Z

Hi Z

Ha Z

09:45:07

09:43:26

Tmax

Tmax

z

z

April 5

C&GS card 34-64:

08:13:12.4

56.9° N., 152.0° W.

h about 15 km

Magnitude 4.5 (CGS).

Pa

Ha

April 5, 1964

M Z Tmax 08:36:13

U Z Tmax 06

Fa Z Tmax 05

NB Z Tmax 11

Hi Z Tmax 08:35:46

Ha Z Tmax 08:34:44

C&GS card 34-64:

07:44:51

60.0° N., 144.8° w.

h about 15 km

Magnitude 4.2 (CGS).

April 5

Pa Z Tmax 08:59:15

Ha Z Tmax 08: 57:44

01:29:20.6

01:35:14

01:38:42

02:08:08

02:08:24

09

30

Og:07:53

02:07:18

eP

is

eR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax 23:08:00

Tmax 23 :06: 47

z

Z

Pa

Ha

April 5

M Z Tmax 02:27:34

U Z Tmax 44

Pa Z Tmax : 39

NB Z Tmax 02:28:02

Hi Z Tmax 02:27:13

Ha Z Tmax 02:26:05

C&GS card 33..,64:

08:59:02

56.2° N., 154.5° w.

h about 15 km

Magnitude 4.7 (CGS).

April 5

M Z Tmax 18:27:12 C&GS card 33-64: U Z Tmax 18:27:00 01:41:45.0 Pa Z Tmax 18:26:57 56,.2° N. , 153.3° w. NB Z Tmax 18:27:09 h about 35 km

(COO) . Hi Z Tmax 18:26:40 Magnitude 5~75-6 (Pal), 5·2 Ha Z Tmax 18:25:32

C&GS card 33~64:

17:40:43.1

56.3° N., 152~9° W4

h about 10 km

Magnitude 4.9 (CGS)e
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

C&GS card 34-64:

ll':42:07.4

59.6° NQ} 144.9° Wo

h about 15 km

Magnitude 501 (eGs).

C&GS card 33-64:

01:51:49

59u4° N., 146.8° w.

h about 15 km

Magnitude 4.3 <CGS)~

April 5, 1964

M Z Tmax 18:33:26

U Z Tmax 25

Pa Z Tmax 20

NB Z Tmax 27

Hi Z Tmax 18:32:52

Ha Z Tmax 18:31:57

01:50~5408 c

54.7 c

54c3 c

Tmax

Tmax

eP

iP

iP

z

Z

z

z

Z

April 6

Pa

M Z Tmax 11:33:48

U Z Tmax 57

Pa Z Tmax 54

NB Z Tmax 11:34~o8

Hi Z Tmax 11:33:39

Ha Z Tmax 11:32:29

C&G·S card 34-64:

09:03:12.9

59.5° N., 14503° w.

h about 15 km

Magnitude 4.4 (CGS).

April 6

C&GS card 34-64:

10:42:36.3

59~9° N., 145e6° W.

h about 15 km

Magnitude 4.8 (eGs) u

April 6

Pa

COOS card 34~64:

10:56:29

59.8° N., 147.9° We

h about 33 km

~~gnitude 4~o (CGS).

April 7

C&GS card 33-64:

01:43:28.7

58~5° N., 154~5° w.

h about 30 km

Magnitude 5.1 (CGS).

M

NB

Ke

19:36~o4c3 d

04.6 d

04.4 d

02.0 d

04.2 d

20~19:31

20

02:42:34

02:42:34

02:41:08

Tmax

Tmax

Tmax

z

z

z

April 5

M Z iP

U Z iP

NB Z eP

Hi Z eP

Ke Z eP

M Z Tmax

U Z Tmax

Pa Z Tmax ," (,,: 12

Hi Z Tmax 20:18:58

Ha Z Tmax 20:18:13

C&GS card 33-64:

19:28:18.1

60.2° N., 146.7° W.

h about 15 km

Magnitude 5-5G25 (Brk))

5.5 (Pal),

5.8 (eG·s).

April 6

M

U

Ha

35
Table 5.--Distant earthquakes-~Continued

Aftershocks of ~he Alaskan earthquake of March 28, 1964

C&GS card 33-64:

06:02:00

60.0° N., 145.7° w.

h about 33 km

Magnitude 4.0 (CGS).

April 7

M Z

U Z

Pa Z

NB Z

Hi , Z

Tmax

Tmax

Tmax

Tmax

Tmax

06:53:00

17

10

13

06:52:57

April 9

Pa z eP 13:14:05.8 d

NB Z eP 07.7 d

Hi Z eP 04.5 d

Na Z eP 10.9 d

Ke Z eP 07.7 d

M Z Tmax 13:57:30

U Z Tmax 38

Pa Z Tmax 29

NB Z Tmax 32

Hi Z Tmax 15

Ha Z Tmax 13:56:15

'-

M Z Tmax 20:24:03

U Z Tmax 16

Pa Z Tmax 03

NB Z Tmax 10

Hi Z Tmax 20:23:41

Ha Z Trrax 20:22:42

C&GS card 33-64:

18:02:24.7

57.3° N., 151.1° w. Ma~itude 4.8 '(CGs). h about 20 km..

April 8

April 7

C&GS card 34-64:

13:22:29.6

56.8° N., 152.0° W.

h about 33 km

Magnitude 4.7 (CGS).

Z Tmax 14:08:51

April 9

April 9

Pa

i

:C&GS card 34-64:

13:06:15.2

59.6° N., 146.1° w.

h about 15 km

Magnitude 5.5-5.75 (Pal),

5.1 {CGS).

18:49:44

18:49:32

18:48:18

Tmax

Tmax

Tmax

Z

Z

Z

Pa

Hi

Ha

C&GS card 34-64:

14:14:36.5

59.8° N., 146.0° w.

h about 10 km

Magnitude 4.3 (eGs).

C&GS card 33-64:

19:33:19.0

59.6° N, J 147~O° w.

h about 15 km

Magnitude 5.1 (CGS).

April 8

Pa z Tmax 15:05:59

C&GS card 34-64:

19:50:l6c8

60.4° N., 145.9° W.

h about 10 km

Magnitude 5_25-5.5 (Pal), 5.3 (CGS). 1

3~6

M

NB

Ke

Z

Z

Z

eP

eP

iP

19:58:04.9 c

05.3 c

05.2 c

April 10

M Z iP 01:15:27.7 c

A Z iP 28.4 c

u Z eP 27.9 c

NB Z eP 28.l c

Hi Z eP 23.4 c

Ke Z iP 27.5 c

Ha Z iP 19.3 c
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

C&GS card 34-64:

21:44:06.7

60blo N., 153.7° w.

h about 10 km

Magnitude 5.5-5.75 (Pal)}

5. 6 (CGS).

April 10, 1964--Continued

C&GS card 33-64:

01:08:00.2

58~4° N., 150.6° w.

h about 15 km

Magnitude 5-5.25 ~Pal), ·-5~5 (eGs).

April 10

01:31:40.5 d

41.0 d

38.0 d

L~l. 2

01:37:34

01:39=38

01:41:34

02:10:57

02:11:14

02:11:04

02:11:01

02:10=59

02:10:45

02:08: 30

Z eP

Z eP

Z iP

Z eP

PEN eS

PEE eGo

PEZ iR

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

C&GS ca.rd 35-64: 01:24:31~2

56~6°,N. J 152.2°.W.

h about 22 km

Magnit'ude 5. 6 -( CGS ) ,

6w 1 (HVO).

April· 12

M

A

Hi

Ke

U

U

U

tv1

A

U

Pa

NB

Hi

Ha

21:51:49.8 d

49.9 d

47.5 d

49.9 d

eP

eP

eP

eP

z

z

z

z

IvI

NB

Hi

Ke

Pa z Tmax 08:24:49 April 12

C&GS card 35-64:

07:33:52

59.6° N., 144.8° w.

h about 33 km

Magnitude 4.4 (CGS).

April 11

M

A

U

Pa

NB

Ha

z

Z

Z

Z

Z

Z

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

10:21:11

17

10:20:55

10:21:06

10:21:12

10:19:46

C&GS card 35-64:

09:23:51.5

56.4° N.) 152.2° W.

h about 33 km

Magnitude 4.6 (CGS)e

Pa z Tmax 10:10:06 C&GS card 35-64:

09:34:44.1

56.6° N., 152.1° w.

h about 20 km

IvIagnitude 5. 1 (CGS).

April 12

37

C&GS card 35~64~

11 : 36 00. '5

60.4° No, 146.4° W.

Magnitude 4.8 (eGs). h a.bout 15 km.

April 11

Pa z Tmax 12:27:31

M Z Tmax 13:23:48

A Z Tmax 52

U Z Tmax 45

Pa Z Tmax 43

NB Z Tmax 49

Ha Z Tmax 13:22:20

C&GS card 37-64:

12:36:23

56.4° N., 151.4° w.

h about 30 km

. Magnitude 5.0 (CGS).
Table 5.--Distant earthquake--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

C&GS card 35-64:

16:14:06.3

56.6° N., 152.1° W.

h about 33 km

Magnitude 5a1 (cas).

C&GS card 36-64:

14:05:00.0

57.6° N., 151.2° w.

h about 25 km

Magnitude 4.75 (Brk), 5-5~25

(Pal), 5.5 (CGS).

April 12, 1964

M Z Tmax 18:13:33

A Z Tmax 40

U Z Tmax 28

Pa Z Tmax 26

NB Z Tmax 13

Ha Z Tmax 18:12:08

C&GS card 35-64:

17:22:02.2

60.2° N., 145.6° w.

h about 20 km

Magnitude 5.0 (CGS).

April 13

M Z eP 12:33:24 c

U PEZ eS 12:39:52

U PEE eG 12:42:34

U PEZ iR 12:44:22

M Z Tmax 13:17:10

A Z Tmax 13:17:05

U Z Tmax 13:17:04

Pa Z Tmax 13:16:47

NB Z Tmax 13:17:15

Hi Z Tmax 13:17:05

Ha Z Tmax 13:15:28

C&GS card 44-64:

12:25:36

59.4° N., 143.9° w.

h about 40 km

Magnitude 4~9 (CGS).

April 13

M Z

M Z

A Z

D Z

U Z

Pa Z

NB Z

Hi Z

Ha Z

April 13

M Z

A Z

U Z

Pa Z

NB Z

Hi Z

Ha Z

eP 14:12:17.3 d

Tmax 14:52:40

Tmax 39

Tmax 44

Tmax 38

Tmax 30

Tmax 13

Tmax 14

Tmax 14: 51 :08

Tmax 17:00:37

Tmax 39

Tmax 35

Tmax 28

Tmax 38

Tmax 07

Tmax 16: 58 :48

April 13

M Z iP 21:32:49.. 9 c

A Z i.P 50.2 c

D Z iP 50.5 c

u Z iP 49.8 c

NB Z iP 49.7 c

Ke Z eP 49.3 c
Table 5....-pistant earthquakes= ....Contin.l1ed

Aftershocks of the Alaskan earthqu~ake of rYIa,r,::.h 28, 1961+

April 13, 1964--Continued

C&GS card 35=64:

21:25:33.0

57.50

N., 15309° w.

h about 30 km

Felt~ Kodiak

Magnitude 5.5 (CGS)Q

April 13

M Z Tmax 22~34:43

A Z Tmax 47

U Z Tmax 46

Pa Z rrmax 31

Ha Z Tmax 22~33:21

C&GS card 35...,64~

21:43~16.5

59.4° N.} 143.1° Wo

h about 33 km

Magnitude 5Ql (CGS)o

April 14

M Z eP 23~O2~51.9 c

A Z eP 52~ It c

D Z iP 53.0 c

·u Z :iP 52.8 c

NB Z iP 52·5 c

Hi Z eP 49.3 c

Na Z iP 55.8 c

Ha Z eP 42.2 c

1J PEZ eS 23:o8~38

·U Fl:EE eG- 23~11~22

U PEZ eR 23~12~58

C&C~S card. 35-64:

22:55:3103

5800° N~ 152.6° Wo

h ab011.t 30 km.

Magn_tude 5.4 (cc~),

5 5 (FlO).

April 15

C&GS card 35-64~

22~29:31~1

59.9° N., 145~6° w~

h abo"ut 23 km

Magnitude 4.5 (cas).

April 14

M Z

A Z

D Z

U Z

NB Z

Ha Z

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

23:20~52

50

49

51

33 23:19~27

39

M Z eP 15~37:54~9 c

D Z eP 56el c

U Z eP 55&4 c

Ke Z eP 54.4 c

U PEZ Q eu 15:43~46

U PEE eG 15~46~O2

TJ PEZ iR 15~47~34

M Z Tmax 16~.l7~O9

A Z Tmax 16

D Z Tmax 07

U Z ~Imax 05

Pa Z ;rmax 16~16~58

NB Z Tmax 16~17~35

Hi Z 'Iimax 16~16~39

Ke Z Tmax 16~17~20

Ha. Z yrmax 16~15~12

C&GS card. 35=64.

15~30~47~1

5685° Nv, 15484° W~

h abollt 35 kIn

Magrlit'ude 5e 5 (CC-s) 5. 9 (Wl())
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

April 16, 1964

19:34:04.9 c

05.8 c

05.9 c

05.1 c

04.1 c

04.2 c

02.5 c

09.9 c

04.5 c

19:33:56.1 c

19:35:26

19:39:50

19:41:58

19:43:38

20:13:06

20

30

20:13:20

12

38

20:12:55

20:12:59

20:11:31

C&GS card 35-64:

04:49:30.5

56.4° N., 152.9° w.

h about 25 km

Magnitude 5.3 (CG·S), 5.7 (HVO).

.. 09:16:28.6 c

29.7 c

28.3 c

09:56:52

09:56:53

59

51

50

2l.t

34

09:55:30

04:56:40.1 c

41.2 c

39.7 c

04:02:26

04:04:34

04:06:26

05:35:42

05:36:00

05:35:48

05:35:46

05:35:46

05:36:11

05:35:30

05:34:19

05:08:04

05:06:52

April 17

M Z iP

D Z iP

Ke Z eP

M Z Tmax

A Z Tmax

D Z Tmax

U Z Tmax

Pa Z Tmax

NB Z Tmax

Hi Z Tmax

Ha Z Tmax

COOS card 35-64:

09:09:07.8

57.7° N., 151.4° w.

h about 20 km

Magnitude 5.4 (CGS).

C&GS card 35-64:

04:16:59.4

59.6° N.·, 144.7° w.

h about 33 km

Magnitude 4.9 (CGS).

April 17

M Z eP

D Z eP

Ke Z eP

U PEZ eS

U PEE eG

U PEZ iR

M Z Tmax

A Z Tmax

D Z Tmax

U Z Tmax

Pa Z Tmax

NB Z Tmax

Hi Z Tmax

Ha Z Tmax

April 17

Pa Z Tmax

Ha Z Tmax

M Z Tmax 08:28:17

U Z Tmax 23

Ha Z Tmax 08:27:00

C&GS card 35-64:

07:37:35.8

59.6° N., 14609° w.

h about 33 km

Magnitude 4. 3 (CGS).

April 16

M Z iP

A Z iP

D Z iP

U Z iP

Pa Z iP

NB Z eP

Hi Z eP

Na Z iP

Ke Z eP

Ha Z eP

U PEZ ePP

U PEZ is

U PEE iG

U PEZ iR

M Z Tmax

A Z Tmax

D Z Tmax

U Z Tmax

Pa Z Tmax

NB Z Tmax

Hi Z Tmax

Ke Z Tmax

Ha Z Tmax

COOS c~rd 35-64: 19:2b:57.4

56.4° N., 152.9° w.

h about 30 km

Magnitude 5.5 (CGS), 6.2 (HVO).

April 17

Pa Z Tmax 04:55:08

Ha Z Tmax 04:53:54

coos card 35-64:

04:03:55.9

59.6° N., 144.7° w.

h about 20 km

Magnitude 4.9 (CGS).

40
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

April 17, 1964 April 20--Continued

M Z Tmax 12:39:58 Hi Z Tmax 04:25~40

A Z Tmax 12:40:04 C&GS card 35E>064~ D Z Tmax 12:40:03 03~34:4581 U Z Tmax 12:39:49 59. 7° 1'J ~, 144. 6° W$ Pa Z Tmax 55

NB Z Tmax 58 h abo11t 30 km

Hi Z Tmax 29 Magnitude 407 (cGS).

Ha Z Tmax 12:38:35 April 20 ...;"

C&GS card 35-64: M Z eP 12:o4~34.3 c

11:48:44.7 A Z eP 35~0 c

60.0° N., 145 .. 5° w. u Z eP 34.5 c

h about 33 km Pa Z eP 34~2 c

Magnitude 4.4 (CGS)e NB Z eP 34.7 c

Na Z eP 3780 c

April 18 Ke Z eP 3401 c.

M Z Tmax 20:54:30 U PEZ eS 12:10=54

U PEE iG 12:14:14 A Z Tmax 24 U PEZ eR 12:15~56 U Z Tmax 34 M Z Tmax 12:48:56 Pa Z Tmax 12

Hi Z Tmax 20:53:46 U Z Tmax 47

Ha Z Tmax 20:52:34 Pa Z Tmax 55

NB Z Tmax 46

C&GS card 35-64: C&GS card 37-64:

20:08:1907 11:56:4106

56.1° N., 153.7° w. 61.4° N., 14703° W~

h about 15 km h about 30 km

Magnitude 4.9 (CGS). Magnitude 6~5 (Pas), 6.75 (Blk),

April 18 6-6~25 (Pal), 5~ 7 (CGS),

5.8 (H'lO).

M Z Tmax 21:01=54

A Z Tmax 21:02:12 April 21

U Z Tmax 21:01:59 M Z iP 05:09:2704 c Pa Z Tmax 21:02:00 A Z iP 28.0 c

NB Z Tmax 21:01:28 D Z iP 28 .. 3 c Hi Z irmax 21:01:39 U Z eP 2705 c Ha Z Tmax 21:00:31 NB Z eP 27.6 c

C&GS card 35-64: Ke Z iP 27.5 c

20:16:16.3 U PEZ eR 05 :20: 58

5601° No, 153.7° w. C&GS card 36-64: h about 30 km 05:01:35.7 Magnitude 4~9 (CGS). 61. 5° N~, 147.4° w, Apri~ 20 h about 40 km

M Z Tmax 04:26:02 Felt: &l1.chorage

Magnitude 6 (Pas), 4.75-5 \Brk), A Z Tmax 00 5.4 (CGS), 5. 5 (HVO). U Z Tmax 03

Pa Z Tmax 04:25=54

NB Z Tmax 04:26:26

41
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

May l--Continued

C&GS card 46-64:

03:40:36.2

59.7° N., 144.1° w.

h about 20 km

Magnitude 4.4 (CGS).

May 1

April 24, 1964

M Z Tmax 04:42:07

A Z Tmax 07

U Z Tmax 04

NB Z Tmax 31

C&GS card 38-64:

03:51:05.0

59.5° N., 144D5° w.

h about 33 km

Magnitude 5.2 (CGS).

M

U

Z iP

PEZ eR

06:09:41.6

06:21:09

April 25 C&GS card 38-64:

06:01:55.4

M Z Tmax 07: 52::26 60.5° N., 145.6° w.

A Z Tmax 29 h about 20 km

U Z Tmax 25 Magnitude 5.4 (CGS).

NB Z Tmax 39 May 2

C&GS card 41-64: M Z Tmax 10:53:05 07:01:20 A Z Tmax 04 59.8° N., 145.3° w. u Z Tmax 12 h about 33 km NB Z Tmax 08 Magnitude 3e8 (CGS). Ha Z Tmax 10:51:45

April 25 C&GS card 41-64:

M Z Tmax 10:34:37 10:02:42

A Z Tmax 45 59. 4° N., 146. 5° w.

D Z Tmax 30 h about 33 km

U Z Tmax 36 Magnitude 4.3 (CGS).

Pa Z Tmax 30 May 6 NB Z Tmax 57

Hi Z Tmax 16 D Z eP 15:33:48.6 d

Ke Z Tmax 21 U Z eP 48.4 d

Ha Z Tmax 10:33:04 U PEN eS 15:39:43

C&GS card 38-64: U PEE eG 15:42:15 09:43:30~7 U PEZ eR 15:43:54

59.9° N., 144.9° w. M Z Tmax 16:13:09

h about 30 km A Z Tmax 16

Magnitude 5.0 (CGS). D Z Tmax 29

U Z Tmax 16:12:59

May 1 Pa Z Tmax -16:13:04

M Z Tmax- 04:32:09 NB Z Tmax 16:13:21

Hi Z Tmax 16:12:44 A Z Tmax 11 Ha 16:11:39 D Z Tmax 14 Z Tmax

U Z Tmax 09 C&GS card 38-64: Pa Z Tmax 03 15:26:35.5 NB Z Tmax 20

Hi Z Tmax 04:31:47 56.7° N., 152.1° W.

Ha Z Tmax 04:30:43 h about 15 km

Magnitude 5.4 (CGS), 5.4 (HVO).

42
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

15:32:36

15:32:37

35 15~30~59

15:10:25

31

22

19

32

07

15:09:15

Tmax

Tmax

Tmax

Tmax

May 16

M Z

A Z

U Z

Ha Z

May 14

M Z Tmax

A Z Trnax

U Z Tmax

Pa Z Tmax

NB Z Tmax

Hi Z Irmax

Ha Z 'IImax

C&GS card 42-64:

14:19:05

59.7° N., 144.4° w.

h about 33 km

Magnitude 4.5 (CGS)e

May 12--Continued

Ha Z Tmax 19:01:51

C&GS card 42-64:

18:16:41.9

56.6° N. J 152.4° w.

h about 10 km

Magnitude 5.5-5-75 (Brk),

6-6.25, '(Pal),

5.3 (cas), 6.0 (HVO)e

21:42:31.5 d

21:53:23

22:26:54

22:26:53

16:28:59.1 c

16:34:47

16~38:51

17:07:59

17:08:15

17:08:21

17~08:21

17:07:59

17:08:15

17:07:42

eP

eR

Tmax

Tmax

eP

eS

iR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax 10:13:20

Z

PEZ

Z

Z

C&GS card 38-64:

16:21:49.8

56.7° N., 154.0° w.

h about 25 km

Magnitude 5.3 (C08·.), 5.7 (HVO).

May 8

M

U

M

U

C&GS card 38-64:

09~23:33.1

59.4° N. J 14584° w.

h about 20 km

Magnitude 485 (CGS).

May 8

M Z

U PEE

U FEZ

M Z

A Z

D Z

U Z

Fa Z

NB Z

Hi Z

May 8

Ha Z

C&GS card 38,-64:

21:34:40.6

60.8° N., 143.6° w.

h about 35 km

Magnitude 504 (CGS).

May 12

C&GS CARD 40-64:

14:44:54

57.6° N~J 151.0° w.

h about 33 km.

Magnitude 5 & 4 (CGS) v

May 17

M

A

Ke

U

U

U

M

A

U

Pa

NB

Hi

Z

Z

Z

PEZ

PEE

PEZ

Z

Z

Z

Z

Z

Z

iP

iP

iP

eS

iG

iR

Tmax

Tmax

Tmax

Tmax

Tmax

Irmax

18:23:54.8 c

57.1 c L 56. 5 c

18:29:43

18:32:09

18 :33 :47

19:03:20

23

10

19:03:14

23

19:02:56

M Z eP 00:57:5783 c

U PEN eS 01:04:19

U PEN eG 01:07:29

M Z Tmax 01:41:49

A Z Tmax 01:42:04

D Z Tmax 01:41:59

U Z Tmax ol~41:55

Ha Z Tmax 01:40:20

C&GS card 43-64:

00:50:17.9

59.4° N., 142.7° w.

43
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28/ 1964

C&GS card 43-64:

15:37:35~9

57~0° N" 152.8° W.

h about 25 km

Magnitude 4.9 (CGS)Q

May 17 - -Continued

C&GS card--Continued

h about 35 km

Magnitude 5.75 (Pas),

6-6.25 (Brk), 6.25-6.5

{Pal), 5~1 (CGS).

5.6 (CGS),

16:25:29~7 c

30.2 c

30~7 c

30.1 c

29.7 c

29.5 c

10:25:21~2 d

21.7 d

22.1 d

21.8 d

21.5 d

21.7 d

18.4 d

20.9 d

11.5 d

10:36:19

11:08:48

48

54

35

54

51

50

17

11:07:19

May 2

M Z iP

A Z iP

D Z iP

MP Z iP

U Z iP

Ke Z eP

e&Gs card 43-64:

16:18:04~2

58.3° N., 156.0° w~

h about 25 km

Magnitude 5.4 (CGS).

May 29

M Z iP

A Z iP

D Z iP

MP Z iP

U Z iP

NB Z eP

Hi Z iP

Ke Z eP

Ha Z iP

U PEZ iR

M Z Tmax

A Z Tmax

D Z Tmax

MP Z Tmax

U Z Tmax

Pa Z Tmax

NB Z Tmax

Hi Z Tmax

Ha Z Tmax

C&GS card 43-64:

10:17:34.5

60.2° N_, 146.3° w.

h about 5 km

Magnitude 5~5 (Pal),

5·8 (HVO).

14:38:19

31

25

19

20

40

14:36:31

15:44:45 c

16:24:23

31

23

-28

16:23:54

15:43:34.0 d

34.5 d

34.1 d

33.5 d

15:52:33

15:54:18

(Brk), 5.3

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

eP

Tmax

Tmax

Tmax

Tmax

Tmax

May 18

M Z

A Z

D Z

U Z

Pa Z

NB Z

Ha Z

C&GS card 43-64:

13:47:22.7

59.6° N., 145.0° We

h about 20 km

Magnitude 4.6 (CGS).

May 19

M Z

M Z

A Z

U Z

NB Z

Hi Z

May 21

M Z eP

A Z eP

U Z eP

NB Z eP

U PEN eG

U PEZ eR

C&GS card 45-64:

15:36:0145

59QO° N~, 153.5° w~

h abou.t l5 km

Magnitude 5~75-6

(eGs) .

44
Table 5.--Distant earthquakes--Continued

Aftershocks of the Alaskan earthquake of March 28, 1964

22:14:17v9 c

18.5 c

19.0 c

1801 c

17.2 c

18,,2 c

15.3 c

21.6 c

17.5 c

07.7 c

09:58:22u5 c

23c4 c

22.6 c

22.6 c

14:54:53

14:54:57

14:55:09

14:54:55

14: 55 :01

14 54 :.49

14:55:11

14:54~33

14:53:38

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

M Z iP

A Z iP

D Z iP

U Z iP

Pa Z iP

NB Z iP

Hi Z iP

Na Z iP

Ke Z iP

Ha Z eP

C&GS card 45-64:

22:06:53.0

58.1° N., 152.1° W.

h about 15 km

Magnitude 5.0 (CG·S).

M Z iP

D Z eP

U Z eP

Ke Z iP

C&GS card 45-64:

09:50:35.0

60.4° N., 146.0° We

h about 15 km

Magnitude 5.2 (CGG).

June 5

June 5

June 3

M Z

A Z

D Z

MP Z

U Z

Pa Z

NB Z Tmax

Hi Z Tmax

Ita Z Tmax

C&GS card 43-64:

14:03:42.4

59.9° No, 143.9° Wo

h abol1t 20 km

Magnitude 5.1 (CGG) 0

17:20:59

17:21:02

17~21:02

17:20: 56

17:20:51

17:21:00

17:20:29

17:19:30

16:17:05.7 c

06.2 c

17:00:44

50

36

25

53

16

16:59:10

03:25:46.0 c

46.6 c

47.0 c

Tmax

Tmax

Tmax

Tmax

Tm.ax

Tmax

Tmax

Tmax

May 30

Ha Z Tmax 23:19:31

coos card 43-64:

22:34:33.3

56.6° Ne, 152.3° w.

h about 15 km

Magnitude 4.7 (-eGS).

June 2

M Z eP

A Z eP

M Z Tmax

A Z Tmax

U Z Tmax

Pa Z Tmax

NB Z Tmax

Hi Z Tmax

Ha Z Tmax

C&GS card 45-64:

16:09:23.. 5

59.7° N., 144.4° w.

h about 15 km

Magnitude 4.75 (Brk), 5.1 (CGS).,

June 2

M Z

A Z

D Z

U Z

Pa Z

NB Z

Hi Z

Ha Z

May 30

M Z eP

A Z eP

D Z eP

C&GS card 43-64:

03:18:08.3

59.5° N., 148.5° w.

Magnitude 4.25-4.5 (Pal),

5.5 (CGS).

•

C&GS card 45-64:

16:29:41.5

59.7° N., 144b2° We

h about 10 km

Magnitude 4.8 (cas).
Table 5. --D,istant earthquake,s--Continued

~ft~.rshock~_~f--!:b~_.:~l:~~~~~~_ear~~9.u~~~,_~.f ~~aE.£~g~---.l·2>§~

JUTI.e l:2~J..-l-264

Ivi Z eP 23 :32 :3'7. 6 c

C&GS card 47-64:

23:25:09.1

59.1° N., 153.8° w.

h about 33 km

Magnitude 5.1 (CGS).

June 28

M Z iP 19:16:29.5 c.

A Z iP 30.4 c

D Z iP 30.7 c

u ,.;.J '1 iP 29.8 c

Pa I,

-'1 L.J eP 28~6 c

l~;.:.~ ~._~B Z eP 30.1 c

Iii Z eP 27.3 c

Ke Z iP 29.4 c

C&GS card 52-64:

19:09:05.4

58.3° N., 150.2° w.

h about 23 km

Magnitude 5.5 (eGs).

46
During the quarter "felt reports" were either phoned or mailed

in by the following people to whom we wish to express our gratitude

for these and other instances of cooperation.

Kilauea summit area

Mrs. V.. Hanson

Mrs. W. Gorder

Mr. and Mrs. C. Wentworth

Mrs. W. Mist

Mr. G~ Kojima

Mr. R. Koyanagi

Miss M. English

Miss L .. Yong

Mrs. O. Duncan

Mr~ and Mrs. A. Yamamoto

Mrs. K. Okamoto

North Hawaii

Mrs. E. Lindsey

MrS1 P. Richards

Mrs. R" Edlillld

Kohala Police Station

Mrs. A.. Paiva

Dr? F. Tabrah

Hila region

Mrs. T~ Crabb

Mrs. H. Lewis

Mr. and Mrs. R. Baldwin

Mr:) C, Shoemaker

Mr. Y. Kojima

Miss E. Patten

Mr. C.. Okamura

Mrs .. T. Indledue

Mr. J. Bryan

Puna

Mr. H. Warner

Mrs" D. Isbell

Mrs. C. Guerino

Keaau Police Station

Ka"u

Mrs J> A. Paiva

Rev. D. Thompson

Kona region

Mr. H. Nelson

Miss A. Greenwell

Mr. M. Sutherland

Mrs. R. Apple

Miss N. Wallace

Central Hawaii

Pohakuloa Military trainees
UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

SUMMARY 35

July August, and September, 1964

By

Willie T. Kinoshita, Arnold T. Okamura

and Robert Y. Koyanagi

OBSERVATORY STAFF

Geology

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

D. L. Peck

Geophysics

R. W. Decker (June 29-Dec. 20)

D. P. Hill

W. T. Kinoshita

George Kojima

R. Y. Koyanagi

A. T. Okamura

Geochemistry

R. T. Okamura

T. L. Wright

Support

E. T. Endo

J. C. Forbes

W. H. Francis

B. J. Loucks

Akira Yamamoto
Contents

Chronological summary------------------------------------------------ 1

Tilting of the ground around Kilauea caldera------------------------- 4

Seismic summary------------------------------------------------------ 7

Persons or agencies reporting "felt" earthquakes during the quarter-- 31

Illustrations

Figure 1. Map of the island of Hawaii showing seismograph stations

and locations mentioned in the text-------------------- 3

2. Tilting of the ground around Kilauea caldera between

April 27 and September 1, 1964------------------------- 6

Tables

Table 1. Tilt coordinates at Uwekahuna Vault----------------------- 4

2. Tilt coordinates and changes at bases around Kilauea

caldera------------------------------------------------- 5

3. Number of earthquakes and minutes of tremor recorded

on seismographs around Kilauea caldera------------------ 8

4. Local earthquakes recorded by seismographs of the

U.S. Geological Survey---------------------------------- 12

5. Distant earthquakes--------------------------------------- 18
Chronological summary

Most conspicuous du.ring the third q-uarter of 1964 were the increase in

sulf-urous fuming f·rom I-Ialernaumau and the step-up in rate of iTlfl,ati.on of K,ilauea

summit which was indicated by both the short-base tiltmeter and the net of

long~base tiltmeters~ The number of felt earthquakes increased (43 during the

quarter), but the total daily counts of quakes remained very lowe

During J~ly the short~base tiltmeter indicated slight but erratic

inflation of Kilauea. A flurry of small earthquakes fro~ the Kaoiki fault

on July 16 lasted 3 hO'urs) Two relatively large quakes were felt d'uri11g

July: one magnitude 4,5 earthquake from a shallow focus beneath the

southeast flank of Kilauea was felt througho'ut eastern Hawaii on the 1st,

and another magnitude ~-o 5 quake J offshore, west of Mauna Loa, was felt

islandwide on the 17th~

In the first half of August the summit tilting accelerated to a rate

sufficient to increase the elevation of Uwekahuna a tenth of an inch per

day, The number of shallow quakes originating in the Kilauea caldera area

increased to more than 100 per day) and tremor was conspicuous by its

absenceo On August 26 one deep magnitude 405 quake under Kilauea and

another of the same magnitude off the northwest coast of Hawaii were felt

islandwidee The daily count of local. caldera qu.akes decreased on August

16 and remained low for the remainder of the quarter.

There was increased seismic activity near Pahoa on the lower east

rift of Kilauea d'uring the first half of September An average of

25 small shallo~T earthq-uakes per day was recorded by tllc Pahoa

seisrnograph~ Several larger q.uakes with magnitudes of from 305 to 4 were

felt strongly in the Puna region.; a, dozen smaller ones were felt only

near Pal10a(, This local activity waG monitared on several occasions

by a portable seismGgraph~

Inflation of the s'ummit area continued at a lower rate during

September, and no evidence suggesting movement of magma into the lower

east rift zone was recorded~

An earthquake of magnitude 409 was felt t'hrougb.ollt the island just

after midnight on the morning of September 18. It originated at about

5-km depth on the southeast flank of Kilauea and was followed by about

50 smaller qua,kes, 2 of wb.ich were felt locally, d"uring the next 24 ho·urs.

Seismic profiles. ..-.. c;oDuri:ng August, Observatory personnel participated

with the Bra.nch of Crl:lstal Studies in recording seismic=refraction

profiles along the northeast, southeast; and west coasts of the

triangu.lar-shaped island of Hawaii.~ Shots were fired at lO--""km intervals

from the U~S~ Coast Guard Cutter Cape Smal~, Lt .. Lloyd cOmt'Ilanding.,

and were recorded along each coast by five refraction units spaced

a.pproximately at 25-km intervalss

Interpretation of the seismcgrams by Do P. Hill indicates that

the crust is about 16 km thick under the went flanks of ~Buna Loa and

Hualalai} and 11 km thick under the northeast and southeast flanks of

Kilau~ea. The crust has an intermediate thickness along the northeast

•
flanks of Mauna Kea and the Kohala Mountains. The velocity of P waves

in the upper crust increases with depth from 2.0 to as much as 6.0 km

per sec.; velocities in the upper crust are generally lower on the

flanks of Kilauea than on the flanks of the other volcanoes. Clearly

recorded arrivals indicate that a layer with velocities of from 6.9

to 7.3 km per sec. forms the lowermost 4-8 km of the crust under each

of the coasts. The velocity of Pn under each of the coasts is about 8.2 km

per sec. Anomalously high crustal velocities are associated with the

major rift zones extending from the five volcanoes that form the island.

Crustal Studies participants in the Hawaii refraction program

were Wayne Jackson, David Stuart, Benton Tibbetts, and Jack Clark.

Puna leveling.--A 50-mile-long network of bench marks established

in 1958 across part of the active east rift zone of Kilauea volcano in the

Puna area was releveled during the second half of 19640 The level

lines, which follow the road network, form one large triangle which

encompasses a smaller triangle, thus affording three loop closures.

These were at 0.075, 0.060, and 0.015 foot, and the survey was well

within 3d-order allowable error. The rift zone is crossed in three

places and paralleled roughly for several miles by the level lines.

Spur lines were run to the Kupapau tide gage and to the Kokoolau

triangulation station along the Honolulu Landing roado

Uplift of 0.3 foot has taken place across the rift zone along the

Pahoa-Kaimu line. The zone of uplift is 7 miles wide, its apex

asymmetric to the north. A small graben half a mile wide and 0.3 foot

deep indents the apex. The swelling is probably related to the east

rift eruption of September 1961, during which much more magma moved

from beneath the summit region into the rift zone than was erupted

along the rift.

The Pahoa-Pohoiki crossing of the rift shows a broad region of

subsidence having a maximum depression of 0.2 footo The line

paralleling the rift zone near Kapoho shows a collapse of 0.2-0.4 foot,

and the road along the shore between Kapoho and Pohoiki appears to

have subsided about 0.1 foot. This general area of collapse along

the rift zone east of Pahoa probably was formed during the 1960

Kapoho eruption.

Three stations north of the Kapoho graben along the Honolulu

Landing road show a sharp uplift of 0.5 foot, which decreases

rapidly to less than 0.1 foot within a distance of l~ miles. This

uplift suggests that some vertical movement took place on the north

side of the Koae fault immediately preceding and during the Kapoho

eruption in 1960. The disturbed zone in'the Honolulu Landing-Pohoiki

region of the rift zone is about 6 miles wide.

New bench marks set in areas covered by the 1960 flows can be

compared roughly with nearby but buried 1958 bench marks. This

comparison provides a thickness profile for the 1960 flows which

fill the Kapoho graben beneath the present Pohoiki-Honolulu Landing

road. The maximum thickness exceeds 70 feet 0.7 mile north of the Kapoho

road intersection without allowing for subsidence of the graben during

the eruption.

2
EXPLANATION

wai~

Honokaa

'000 a

Paauilo . a

• Seismograph Station

o Town or locality

it R 8 L-J.o 15 20 Ip .......

Contour interval 1,000 'ee'

Datum ia m.an leo ....1

Topooraphy by US, GeoIoticei Sw",

Laupahoe oe 20·

Figure l.--Map of the island of Hawaii showing localities mentioned in

the text and seismograph stations operated by the DoS. Geological

Survey. Epicenters of local earthquakes are given in terms of

geographic coordinates, which are indicated at the edges of the

map.

3
Organization of the leveling fieldwork and analysis of the results

were done by R. W. Decker, who was on sabbatical leave from Dartmouth

College.

Tilting of the ground around Kilauea caldera.--Tilting of the ground

around the summit of Kilauea is monitored daily by a short-base watertube 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 were begun. Increasing tilt

coordinates correspond to northward and eastward tilting of the

earth's surfacej that is, to a relative s~bsidence 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.

Table l.--Tilt coordinates at Uwekahuna Vault, July, August, and September,

Date N-S E-W Date N-S E-W

July 5 468 504 Sept. 6 477 488

12 469 504 13 478 486

19 470 502 20 480 482

26 472 502 27 480 479

Aug. 2 471 501

9 471 499

16 473 495

23 474 495

30 476 490

4
VI

Table -=Tilt coordina.tes and changes at bases around Kilauea caldera, (See fig" 

r

Rate (10=6 rad/rno Y Date 

Tilt Base Date and direction of la

(1964) N=S E=W tilting since read

last reading (19

Uwekahuna Aug. 27 469.6 477.2 507 40.7° w. Apr

Tree Molds 28 441.0 508cl 2c1 No 19.7° w. May 

Sand Spit Sept" 1 872,"6 742.9 8e5 46.7° 

Kalihipaa Aug" 27 330c6 383.9 109 Se E. Apr 

Kearnoku 28 577e3 5652° We 

Ahua Kamokukolau 26 584.3 528£ 5 9·5 s. 6.0° w. May 

Kipuka Nene Sept .. 1 482€6 508s3 32r 3° W. Apr" 

Hilina Pali Not occupied this epoch

Kapapala Ranch
cP

,>0

Kap

41

o

,KN

Cl

o

2000

• HP

I---t

TILTING RATE 5.0 X 106 RADIANS / MONTH

APR 27, 1964 - SEPT I, 1964

5 KM

Figure 2.--Tilting of the ground around Kilauea caldera, April 27 to

September 1, 1964. 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 circles, short-base water-tube tiltmeters.

6
Seismic s~mmary.~~Events recorded by the uwS~ Geological Survey

seismograph network in Hawaii fall into two categories: local earthquakes

and tremor originati11g in the region of the Hawaiian Islands (usually

within 100 km of at least onle seismograph), and 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 3.. The earthquakes are separated into groups on the basis of

region of origin as determined by analysis of records obtained daily

at t'he Observatory (U, M, A., D, N, wp., MP) .. Earthquakes of magnitude

200 or greater are generally sufficiently well recorded to be located

with greater precision; they are listed individually in table 4n Data

on identifiable phases from distant earthquakes are listed in table 5~

Locations of the seismograph stations are shown on figure 1, and

essential data pertaining to the stations were given in Summaries

25, 29, and 33"

7
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs U

N, WP, and MP around Kilauea caldera

Tremor is into three categories: deep, intermediate, and on the ba

amplitudes recorded by seismographs in the summit regione Unless otherwise stated, 

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

Earthquake categories are: Halemaumau rock slides, which are detected by the charact

they produce on the North Pit seismograph; shallow earthquakes in the Kilauea calder

shallow earthquakes along the SW. rift zone of Kilauea and the adjacent portion of t

fault system; earthquakes along the eastern half of Kilauea's east rift zone (from 't

seismograph); earthquakes from a source about 30 km beneath the Kilauea summit regio

earthquakes from the upper east rift zone and the adjacent fault systems of Kilauea

flank, and earthquakes from other regions: Kona, Mauna Kea, etc.

Date. Trernor

(1964) l (in minutes) Earthquakes

I Inter- SW. rift Eastern Kilauea Upper Deep mediate Shallow maumau Kilauea and east summit east 

t

I slides caldera Kaoiki rift 30 km rift

i

i'.

K

July 1 1" 10 ... 30 10 2 21· _c.c ___ ----- -=

2 __ ca:acac:::lc:a 1IE __ 33 6 ... 3 2 C

3 ... 2 e::-c.a_-=ClClI:IID 1 49 10 4 __ c=lI-=: 

4 __ GiClc=;:)aa_C:=tKlO 32 7 1 2 1 

5 ... C.:I_.,c;;;:a .... 1 38 13 2 1 ? 

6 ___ __ CD'- 62+ 12 _ ... 4 3+ 1 

1 

7 34 48 12 .-:. __ .ac.- 3

c:

8 ... .,aDtElR 8 56 13 -=:; -=----- 4 4+ 1 

9 c::;:'lr"aCoiJ-::&.a:&::I 33 18 .- _53 - .. 4? 

10 1----- 43 12 ..- 5 6

11 .... a&"\.8&Z _Cllf __ C:&as 38 22 1 10 6 1 

J 6 66 15 2 4+ 12 __ m::_ _____ c.::l ..:.mc-. ___ -=- -.._....

t
Table 3c-=Numbers of earthquakes and minutes of tremor recorded on seismographs U

N, WP, and MP around Kilauea

Date Tremor

(1964) (in minutes) Earthquakes 

Inter- Hale=> rift Eastern Kilauea Upper 

Deep mediate Shallow maumau Kilauea and east summit east 

slides caldera Kaoiki rift 30 km rift

July 13 5 3-8 13 11 5 

14 3 -== ..... 42 6 5 3

15 32 c=.c=:J c.r::.: 47 34 2 3? 

16 49 43 2 

17 4 __ .-::J 43 11 2 1 

18 50 14 4 6 

19 caoc:::Jt='Ic:sc::s c;:.:::Ii:"c.:J=Giiii:Jc.. 53+ 7 1 7 

20 47 6 .c.=l_CZC __ :: 9 3 21 == c::= c=a -= '-=' 45 10 6 2

22 a::s-=':C:::t'lmc=J '::SQ&c.:::3=-QiQC= 43 24 C=C:Z::'" c.KCZ'\ 2 

23 3 ... 2 100 21 1 

24 4 c:;:)c:lS=-:=t:-=C::= 95+ 28 3 4+ 

25 .,..=tCZ)c:::)c:=-= .. 70 13 -=:»ua.c=lc=J_=::I 3 ? 

26 == C:ic::'l c.=-c=3 60 34 14 2+ 

27 5 37 10 6 

28 c=JC="C=:C:=.:::2 c:::.c::::::E' 25+ 20 4 

29 c=...= C) c:::::J co= 5 !;:) CS) c= c='It-=:I 25 12 9 a;QO.::z.t=) 

30 ...... C::::=l::::1 ..:=)c:::::= ::2c:;::)C=c::. 36 17 1 2 

31 5 .= QlDIWIe 40 12 9 4 1

Aug .. 1 -." ·8 c=-(:tc:.= t= c..,:) r::& 33 16 3 4 

2 13 c:=r.o;cc=Jc:::Jc:".=. 32 9 2 2

3 c:= c=;) c= c;;:'I co:::= c::r=;t..:;:)CKj<::::e:'c::,o 20 5 :::et=::Jt:::2c;:1c::=Je::'\ 3 1 

4 57 5? 1 ? 

5 53 4 1 :-= CD=- 

6 55 12 =- 3 2
Aug.

7 39 100

5 ------

5 

8 85 10 ------ 1 

9 100

3 .- ------ ------

3 

10

4 65

3 ------ 1 1 

11 85

7 ------ 4 4

12

5 116 16 ------

3

3 

13 III

6 ------ 1 6 

14 1 90

6 ------ --_..._-

5 

15

9 104

8 ------

3

3 

16 13 1 80

8 ------ ------

4 

17 60

4 ------ ------

4 

18 ------- 50

5 ------ 2 

19 28

6 ------

2 12 

20

2 30

9 ------ 1 5 

21 29

6 ------

4

6 

22 30

6 ------ 1 3

23 48 37

6 1 2 2 

24 45 10 ------ 1 

25 12 47

6 ------

3 

26 58

2 ------

3

7 

0

27 80 4 2 ____ e:--.

2 

28

9 61 11

4 2 2 

29 83 13 26 1 3 

30 65

7 63 2 5

31 60 17 23 _a- __

5 

Sept. 1 80+

8 23

4 

2 65

9 16 3. 

3

5 60 12 10

2 ...)ii 

4

7 39 19 15 1 13 

5 56 19 11 10 10 

6 66 16 24

4 13 

7 11 30 24 34

4 2+ 

8 16 74 17

9

8

5

9 11 ? 22 11

6 ? 

10

4 51 -6 11 2 3 
Table 3.==Numbers of earthquakes and minutes of tremor recorded on seismographs U

N, WP, and MP around Kilauea caldera-=Continued

Date Tremor

(1964) (in minutes) Earthquakes

Interc::o Hale QU SW. rift Eastern Kilauea Upper

Deep mediate Shallow mauma·u Kilauea and east summit east 

slides caldera Kaoiki rift 30 km rift

Septe 11 45 7 18 4 a::ac;;::)G:'C:Z

12 = C=C=C=... 47 21 92 2 12 13 :zI1tZ:'Aiiiiii1c:Jc.. 65+ 9 43 2 2 

14 c::= t:') c= l'=:J 50 25 37 2 5 

15 c:-. ca c::= I::U 4 c::I:)c:::Jt:=e::::-CCCiil 62 9 25 5 2 

16 c:.::zIe;;:::,c;;;;J 54 10 27 3 3 

17 45+ 10 34 4 85+ 

18 c=-_r=c::=t 2 :::=: __ 62 15 7 3 12+ 

19 ':::Ic::zIC::Je:::t c:=) .. c,ac::::::lC=S 62 11 8 3 10 

20 r::Dt=SCl::lCZI 68 6 8 2 4 

21 63 6 2 3 

.. =c:=e::::::t_c::::I

22 C=.::::J; c;::)e:tae ClQC= ... C=::=Je::::t ... 54 12 4 2 3 

23 c:lca c:::::l c:::e:::t 48 8 c= :::3 =-s c=" &::::) 1 124 aa::z:a.-CQIc;11O 58 9 5 3 12 

25 2 88 4+ 4 16 -2 26 c.I&=:IC=Sta.-c::= 98 14 9 6 27 ZlKtCStc:;:ltz::) c:::::Ic:::3rQ1c:1;J:);ZI 90 6 -= .::8I __ QIIIQ:QC,3 2 

28 c::. a:I ro;:;J c= ..-e::::tIl::;;:Oo&::lc;:::a 49 4 2 4 

29 ;o:;:ss;;::c::.;a:ztc.- ... 63 4 2 

30 'l::::I u:...-s CI:;.;:J 48 4 :a;ac-.Sii:De"'a'-== ., 8D c:::Ir:z gIIE c:::;:a 6
Table 4.--Local earth uakes recorded by seismo raphs of the U.S. Geolo ical Surve

July, August, and September, 19

Entries for a given quake are: date, origin time (Hawaiian Standard Time), magnitude, 

and felt report. All magnitude 2.5 and larger, as well as many favor

smaller ones, occurring on or near the island of Hawaii are included in the list.

In the '-'following list, some origin time s are followed only by "KM 30" and a statement 

These! are all members of a continuing family of quakes noted also in other Summaries

mean focus for this group is beneath Halemaumau at a depth of 30 km (19°24.1' N., 15

In the following list a number of quakes are described as "Upper east rift" (see Summa

statistical study of this group which occurred in the swarm periods during July 1 to 

3 to 4 gives a mean epicenter 19°21.5' N., 155°14' W. about 2 km south of Aloi Crate

depth.

In Summary 24, "Kaoiki" was introduced a·s a symbol for listing any of a family of quak

focus 19°24' N., 155°24' W., h=3 to 8 km. This symbol is used in the following list

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h m s Lat. N., w. Description - - -

July 1 10 43 0905 4.5 5 19°18.8' 155°06.9' 10 km SE.. of Makaopuhi F

seismometer. 

1 10 46 4900 208 5 19°1808' 155°Q6.9' 10 km SEe of Makaopuhi

seismometer"

1 13 44 55·2 2.3 30 19°23.. 7' 155°1888' 4 km SW. of Uwekahuna

seismometer..

2 04 19 2.. 4 30 19°23.8' 155°17.7' 4 km Be of Uwekahuna

seismometer.

3 15 03 13.0 2.2 5 19°18.2' 155°05.5' 13 km of Makaopuhi

seismometer.

4 06 39 19.5 2.3 8 19°57.2' 155°21.9' 15 km of Laupahoehoe

5 05 25 10.4 2.7 30 19°22.3' 155°19.2' 6 km W. of Ahua

seismometer.

7 05 40 18.0 2.3 13 20°01.. 5' 155°19.2' 8 km ESE(' of Paauilo
Table 4.. <==>Local earth tlakes recorded by seismo ra hs of the UrS,.. Geolo ical Surve j

July AUgllSt, and September, 19

Date Time Magni= Depth Epicenterl 

(1964) tUde (km) --.# 

h In

.-

s N W9 Description

8 08 56 8 1550 451,8 t 20 km NE" of Kealakekua

11 11 45 53.6 2<03 8 19°58c9 i 8 km ESE" of Laupahoehoe

12 13 26 23,,7 2c3 5 190 18,,8' 9 km of Makaopuhi

seismometer.

15 18 48 3e2 10 19° 19., OW 155°07t'2' 9 km of Makaopuhi Fel

seismometer" s

17 13 10 405 13 155 0 59(; 2 y 43 km of Kealakekua Fel

18 14 31 10$1 209 13 19°50c8 i 155°34,,2 v 24 km SSEt; of Kamuelac=> = c-, Fel

18 18 51 22.·3 13 20° l)+e 6 t 25 km Nc of Kamlle la- <= c= c= = 

19 04 36 31€0 13 19°5303 i 155°33c2 i 21 km SE.. of

19 09 26 11@4 45 20 km. of Ahua

19 23 55 ==c::::>

25 01 2,8 3801 2,,4 8 19° 2 y 12 km SSEe of Ma.kaopuhi

seismometer.

26 16 56 2e5 3 155°37.9' 20 km NNWc of Naalehu

27 07 04 22,0 3 19°40,,2 F 155"4lc8' 31 km NEe; of Kealakekua27 19 41 5 203 8 19°57,.3 f 155°49,,1' 7 km of Kamuela27 23 47 5geO 2(,,3 ===

28 04 39 8 19°22" ow 18 krn of Kealakekua28 18 05 50.2 25 19° 25,· 5 3 km E" of Uwekahuna Fel

i seismometer., s

28 18 06 50(:5 25 19° 8 i r'\ c:. km S.: of lTwekahuna

seismometero

29 07 49 03Ll 2.7 8 155°36e8' 20 km SSE" of Kamu.ela29 14 33 4003 YJ4

"30 07 ,/,1 2e5 ==..'--: KM

30 17 31 11,,0 8 19° 57.) 3 r 1550 51.1) 6i 20 km SW", of Kamuela«=== c= c::= 

31 11 33 45cO 204 3 19°27w3 R 154" 55,,5 i 6 km SSEq of Pahoa=====-

Aug<, , 46 27,,8 2 ..,8 8 155° 52._- 8' 21 km NNEe of Kealakekl18, c::::2_c='tw:

..I- ...J

1 11 07 3.·.,0 155°'5Jl€ 9! 23 km g, ,of Kcalal{,c'kua= =

1 15 35 5 r.'Z'

1 15 36 15cO 2$0 c::::)c::::::,t::', ,;;.) l::

3 10 36 o8c7 5 8 155°3305 Y 15 km Nl\TEr. of Naalehu=== Fel

N

K
Aug. 3 15 39 28.4 2.4 ------- _e- ____.__ KM 30------------------- Fe

4 01 38 50.0 2.5 3 19°31.7' 155°48.8' 12 km mE of Kealakekua

4 20 14 2904 2.1 -------- KM

5 03 12 19.5 2.4

8 19°11.4' 155°35.5' 14 km N. of Naalehu----...--

6 16 51 43e5 2.1 -------- --------- Kaoiki------------------

7 04 56 15.0 2.7

< 3 19°26.8' 155°46.2' 18 km ESE. of Kealakekua

7 10 56 24trO 2.5 -------- --------- Kaoiki------------------ Fe

7 20 45 09.0 2·9 13 21°01' 155°15' 105 km ENE. of Haleakala --

Maui.

9 10 17 15.5 2.2 3 19°13.8' 155°13.2'

5 km ssw. of Apua Point

9 10 20 06.1 2.2 13 19°16.2 1 155°11.7' 11 km SSW. of Makaopuhi --

seismometer-. ----- -_.-

11 15 09 20.5 2.2 -------- -------- KM 30------------------ Fe

11 15 14 05.9- 2.5 30 19°21.4 1 155°18.7'

6 kIn wsw. of Ahua Fe

seismometer.

13 06 27 38.9 4.5 30 19°30.0 1 155°16.2'

8 km NNE. of Uwekahuna Fe

seismometer.

14 10 51 08.5 2.8

8 19°23.2 1 155°29.1' 12 km WNW. of Desert Fe

seismometer.

15 18 15 55.5 204

8 19°20.0 1 48.

0 1 25 km SEe of Pahoa

I-J 16 14 09 05.0 2.1

5 19°20.5' 155°04.2 1 13 km ESE. of Makaopuhi +:- seismometer.

16 15 58 3401 2e9

5 19°22.8' 155°30.7' 14 km WNW .. of Desert Fe

seismometer. 

19 04 50 1505 12 20°03.8 1 155°55.2 1 10 km WNW. of Kawaihae

20 23 09 45.

4 2.4 ____ __ C8: ... _- KM

23 09 24 3 155°14e8 t 14 km S. of Ahua

seismometer.

24 17 30 2.0 __

25 03 02 09,0 205 3 19°5505' 155"34.5' 18 km SEe of Kamuela25 2,1 31 0100 2v7 43 19°13.3' 155°18.8' 15 km SSEo of Desert

seismometer..

26 08 30 4c4 12 20° 14' 156°09' 33 km of Up01ll Fe

Point. 

H

26 19 35 29·7 207

8 20°00.,0' 155 0 26 .. 5' 10 km SSE. of IIonokaa

14 22 10.8 2.8

5 19°26.5' 154°52.8'

9 km SEe of Pahoa Fe

27 17

8 19°59.5 1 155°49.8' 16 km wsw. of Kamuela

27 21 26 2.4

8 19°15.3' 155°08.8 t 13 km SSE.. of Makaopuhi
Table 4 .. ==Local ea:rtll uakes recorded b raphe of t11e Ue S;:. Geolo ical S1.lrve ,

July, August, and September, 19

Date Time Depth Epicenter 

(1964) tude (km) 

I-:r.r..

b_ ID S We Description

-

28 21 10 16',) 5 2c2 8 -4 km NNW., of Pahala F

29 11 07 2.4 13 19°38 j 156°15' 38 km of Kealakekua

30 12 20 1 2,,8 8 8 km SSW" of F30 12 22 2.1 8 19° 25,,8 f 8 km SSW" of Pahoa c= - <= = ='.- F31 07 57 47.. 0 3,,2 5 19°27.. 5 km of .... --c= F

31 13 25 F31 21 57 3480 2v6 8 J_8 km E" of F

1 06 39 3c7 5 5 km SSE" of F

- 

1 21 57 21'0 5 154°56rl' 5 km of Pahoa=-=<E:==

2 02 11 . 2&0 5 1" 1540 56c.1 5 km of Pahoa=====c= F

2 02 58 3 19°26.. 9t 154.. 7 km SSE.. of Pahoa=>=====

2 04 03 19':>26,8 t 154,;. 0" 7 km SSEo af

2 06 14 55,,0 2 8 19° 14. 17 km 'of Desert

seismometer'.

3 00 57 2,5 3 155c 4093' 12 km VJ.NW of North Bay

seismometer...

3 01 43 3205 2.,5 8 19°2805' 7 km of' Kealakekua

3 05 46 2,,) 7 5 19°28,"2 i 154°54.8' 5 km of Pahoa===.-=c-:, F

3 18 36 8 9 km SE" of

3 19 50 58eO 2,,0 === .-;;;;:)::IC == c=: 0&

5 01 26 0 2.. 6 10 19°19"Ov 5 km S(\ of Y.aakaopuhi

seismometerf'

6 03 09 2.5 5 l5)+o 7· 5 km SE" of Pahoa=c:.=c:o=<z>

6 07 39 8 14 km of :Makaopuhi

seism0meter"

6 08 33 17c7 3 9 km SE,. of Paho9. F

7 03 35 2407 2 7 8 19°26,,2 v 155°36.2 t 7 of l'Jorth Bay 

seismometer<o

7 06 10 3 19°26c7 t 8 km of F

7 06 13 3(.)0 3 7 i 154°53eS- 8 krn of F

A

s
Table UeS. Geolo ical Surv

--Continued

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h m s Lat. N. Long. w. Description -- - - -

Sept. 7 14 19 26.1 2.5 8 19°30.0' 155°48.6' 12 km ESE. of Kealakekua

7 17 17 34.3 2.3 -3 19° 30.0-'- 155°43.0' 22 km Ee of Kealakekua7 19 42 27.6 2.7 --- --------- -------- Kaoiki------------------ 

-- -- 

8 08 26 40.4 2.5 --- -------- --------- Kaoiki------------------ 

8 14 19 16.0 2.2 --- -------- ---------- Kaoiki------------------ 

9 17 42 49.5 2.8 30 19°22.5' 155°20.0' 8 km NE. of Desert- -

seismometer.

9 22 17 31.8 2.4 --- -------- --------- 

10 11 09 24.4 2.4 5 19°27.7' 154°55.5' 5 km SSE. of Pahoa-----E>I 

12 21 27 34.0 2.7 < 3 19°27.7' 154°55.7' 5 km SSE. of Pahoa--........ 

13 03 39 24eO 2.7 < 3 19°26.8' 154°55.9' 7 km SSE. of Pahoa---=--E>I

14 06 02 12.0 3.8 3 19°26.5' 154°56e2' 7 km SSEc of Pahoa-- K3 O=-- 

14 19 21 4205 2.5 3 19°27.5' 154°54.8' 6 km SEo of Pahoa"",K::OO=K::O--==

15 04 18 3400 o ., ...._- .. .. c: • .L

16 06 04 41.8 3.3 8 19°20.1 i 155c o4.8 Y 13 km ESEl> of Makaopuhi 

seismometero 

16 18 34 03.3 2.4 3 19°25.9' 154°5508' 8 km SSE. of Pahoa.",==E:>-=

18 00 25 29.l 5 19°18.9 i 1550 06.9' 9 km SEe of Ma.kaoptilii 

seismometer.

18 02 07 56.8 3.6 5 19°17.9' l55°07.3' 10 km of l\-1akaOplJhi 

seismometer c 

18 02 2l 40co 205 3 19°19.1' 155°0608' 10 km SEc of Makaopllhi 

18 08 01 27.2 3 19°18.2 i 155°07.5' 3 km SEe of Makaoplilli 

seismometer. 
Table earthquakes by seismJ of the U.So Geolo ical Surve 

July; and September, 19

De"te Time Magni;- Deptl1. Epicenter 

(1964) tade 

11 In S Lat. 1'J c· Long" w. Description c=-

8ept& 18 06 56 2,3 -8 19° 08c: at 30 km SEe of Apua Point

""iO 09 c)" : Yj\,1 ..L../ -+

19 12 06 4b.2 r:: l9°2102v km SSEI' of Pahoa"",c=o::o-=- ..I ./

19 23 07 202 13 19c 54p5' 155°22tl Y 17 krn of Laupahoehoe

20 02 17-1-1 2e3 -13 19° 5t 18 km SWo of La-u.pahoehoe

21 15 34 00.. 1 2.,0 z:DK:.l-=zo.cc::JEr.t=:c:Jc..t.=

21 15 58 21)0

22 06 34 28e5 2n7 13 19°55.9i 15 km SE. of !{amuela =- =0 _-=0 F

22 11 50 2.3 8 19°17.8' 12 km SEe of MEJkaopuhi 

seismometer.,

24 16 47 42eO 3 19°211l2 i 155°02.0 t 17 km of M'akaopuhi

selsm.ometr:;r.

26 00 36 27c5 31)4 25 19°22.1i 155c 19.0i 9 YJrl NE. of Desert F

seismome=ter" 

26 17 15 08.3 5 .19c, 2211 2 ' 155°25cO' 5 km of Desert

seismometer.
Table 5.--Distant earthquakes

Times are reported in Greenwich Civil Time which is 10 hours faster

than Hawaiian Standard Time. A "e" following the time of P indicates

compressional first motionj a "d" indicates dilatational first motion.

Station -symbols, locations, and instrumentation are presented in

Summary 33. Magnitudes calculated from the Hawaii seismograms are

followed by (HVO). Location of epicenter, origin times, and focal

depths, and magnitudes reported by other institutions are taken from

"Preliminary Determination of Epicenters" published by the UoS. Coast

and Geodetic Survey.

July 1, 1964

M Z eP 13:45:05.9 c

A Z eP 05.8 c

N Z eP 06.4 c

MP Z eP 07.4 c

July 4~ ..Continued

I-li Z eP 2404 c

Ke Z iP 18.6 c

Ha Z eP 16.8 d

NB Z iF 2102 c

C&GS card 54-64:

06 :35 :18

53.4° N., 167.8° W.

Fox Islands, Aleutian

h about 45 km

Magnitude 4.75-5 (Pal)

4.8 (cGS).

C&GS card 56-64:

13:33:10

1.8° N., 127.1° E.

Molucca Passage

h about 33 km

Magnitude 4.5 (CGS).

July 2

M

A

D

N

MP

U

Hi

NB

Ha

Z

Z

Z

Z

Z

Z

Z

Z

Z

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

07:19:09

23

23

21

14

08

07:18:50

07:19:12

07:17:10

Islands

C&GS card 53-64~

10:49~2808

11.7° No, 14405° Eo

Mariana Islands

h abo·ut 33 km

Magnitude 600 (CGS)o

July 5

U PEZ eP 19~15~47 c

Na Z iF 50uO c

NB Z eP 4909 c

U PEZ is 19:22:03

U PEE eG 19:25 :27

U FEZ eR 19:26~59

C&GS card 53-64~

19:07:5708

26.2° No, 110.2° We

Gulf of California

h about 29 km

Magnitude 5.75-6 (Brk),

6..6025 (Pal),

6.4 (HVO)o

July 5

July 4

M Z iP 10:59:22.2 c

D Z iP 22.4 c

WP Z iP 23.0 c

MP Z eP 23.5 c

U Z iP 23·1 c

Pa Z eP 24.4 c

M Z eP 23:45:07.1 d

NB Z eP 06.1 d

U FEE is 23:52:31

U PEN eG 23:57:23

U PEZ eR 23:59:39

C&GS card 53-64:

23=36:01.5

18
Table 5.--Distant earthquakes-~Continued

July 5, 1964~=Continued

C&GS card 53~64:=~Continued

44.8° Nft, 14986° Eo

Kurile Islands

h about 54 km

l~gnitude 6025 (Pas), 6-6.25 (Pal),

5~5 (CGS), 605 (HVO).

July 6-~Continued

C&G·S card-c»Continued

Magnitude~-Continued

6e75-7 (Brk), 7025~7.5 (Pal),

6. 3 (CGS), 70 2 (HVO) c

July 6

July 6 u PEZ eR 20:13:55

U PEZ eP 02:22:23 c

Hi Z eP 21e5 c

N°B Z eP 24.3 c

U PEZ is 02:28:47

U PEN eG 02:32:05

U PEZ iR 02~33~15

C&GS card 57~64:

19:50:42el

21e2° B., 173.8° Eo

New Hebrides Islands region

h about 22 km

Magnitude 408 (CGS)o

July 7

M Z Tmax 14:26:40

A Z Tmax 19

U Z Tmax 35

Pa Z Tmax 11

Hi Z Tmax 04

Ha Z Tmax 14~25~59

C&G·S card 53=·64

13~44~40

4304° N~, 127~2° Wa

Off coast of Oregon

h abo'ut 7 km

Magnitude 5e7 (CGS)~

07:47:10.6 d

1000 d

0904 d

iF

iP

eP

Z

Z

Z

C&G·S card 54c;o64:

07~39:o4~2

23060 B., 179c9° W9

Fiji Islands region

h abou.t 462 km

Magnitude 5e5 (CCB)o

July 7

M

A

D

C&GS card 55..,,64:

02:14:36~0

26~2° N~, 110a4° W~

Gulf of California

h about 33 knl

Magnitude 6=6Q25 (Brk),

6-6~25 (Pal), 504 (CGS),

and 6c 8 (HVO)

C&GS card 53<=64:

07~22::1c7

18.3° N., 100.4° Wo

Guerrero j Mex.,

More than. 30 killed, many

injured and consider~ble

property damage in GuerreroQ

h abcu.t 100 km

Magnitude 6~. 75~7 (Pas),

M Z eP 07~31:11,,8 d

A Z eP 10.. 8 d

D Z eP llc7 d

MP Z eP 10~ 5 d

Pa Z iP 0708 d

Na Z iP 13,,4 d

Hi Z iP 0904 d

Ke Z eP 1406 d

Ha Z iP 16.7 c

NB Z iP 13~5 d

u PEZ is 07:38:36

U PEN "rt lu 07 :44 :·11

19
Table 5.--Distant earthquakes~~Continued
Table 5. --Distant. earthquakescc>"",Continued

July ll-~Continued July 12--Continued

C&GS card 56-64:

09:44~1807

59.7° Ne, 14601° W.

Alaska aftershock

h about 33 km

Magnitude 5 (Pal), 503 (CGS)~

Ju.ly 11

C&GS card-~Continued

01:45:2506

3806° N., 139~2c Ee

Near west coast of Honshu, Japan

h about 13 km .

Magnitude 5.25-5~5 (Pal), 6.0

(CGS) .

July 13

July 20

C&GS card 61S364:

12:45:47.7

0020No, 123&5° E~

Northern Celebes

h about 97 km

Magnit'ude 508 (CGS) c

M Z iP 12 :' 57 : 58. 7 c

A Z iP 5807 c

D Z eP 58.2 c

U Z eP 58.8 c

Na Z eP 57.;5 c

Hi Z eP 12:58:0005 c

Ke Z eP 57.: 55/t 8 c

l'JB Z eP 57:5800 c

Tmax 07:28:36

Tmax 07:28:45

z

Z

PEZ eR

C&GS card 59~64:

18:49:4305

19.8° N., 109.0° WQ

Revilla Gigedo Islands region

h abcu.t 33 km

Magnitude 4&5 ...4075 (Brk),. 5 (Pal),

501 (CC-S) 0

C&GS card 56eu>64:

06:47:54

44~7° N., 129.9° WQ orf coast of Oregon

.h about 33 km

Magnitude 505 (cas) v

July 18.

u

Pa

NB

M Z iP 20:33:19~3 d

D Z iP 20p5 d

u Z eP 19.5 d

Ke Z iP 19.3 d

u PEZ eS 20:39:39

U PEZ eR 20:44:07

M Z Tmax 21:17:00

D Z Tmax 21:17:07

MP Z Tmax 21:16:57

U Z Tmax 21:16:52

Fa Z Tmax 21:16:35

Hi Z Tmax 21:16:39

Ka Z Tmax 21:16:09

Ha Z Tmax 21:15:13

NB Z Tmax 21:17:QP

C&C-S card 56-64

20:25 :40" 3

5907° I~~, 146.2~ W~

Alaska aftershock

h about 40 km

Magn.itude 5-5025 (Brk) , 5c5c>o5075

(Pal), 5~ 6 (CGS),

5d 7 (RVa)o

July 12

~I Z eP 01: 55 :28(,8 c

D Z eP 2903 c

Pa Z eP 30e6 c

Na z· iP 29.2 c

Hi Z eP 2807 c

Ke Z iP 2502 c

Ha Z iP 18.. 9 c

NB Z eP 28.2 c

U PEE eS 02:03=47

U PEE eL 02:10:19

U PEZ eR 02:12:09

C&GS card 55c:064:

21
July 21, 1964

Table 5.--Distant earthquakes--Continued

July 24--Continued

C&GS card 59-64:

01:09:25.8

19.8° N., 108.8° w.

Off coast of Jalisco, Mex.

h about 31 km

Magnitude 4.75-5 (Brk), 4.9 (eGs).

u PEZ eR 01:28:45 C&GS card--Continued

Kurile Islands

h about 33 km

Magnitude 6 (Pas), 6 (Brk),

5. 9 (CGS), 6. 3 (HVO).

July 24

July 21

M Z iP 03:57:34.3 c

MP Z eP 33.7 c

Hi Z eP 36.5 c

Ke Z eP 32.0 c

U PEE is 04:04:34

C&GS card 59-64:

03:48:59.1

26~00 S., 178.0° w.

Fiji Islands region

h about 222 km

Magnitude 6.5 (Pas), 5.25-5.5

(Brk), 5.8 (cGS).

July 21

M Z iP 08:21:3003

A Z eP 31.4

D Z eP 30.6

U PEZ iPP 08:23:23

U PEE is 08:28:39

U PEZ iSS 08:32:17

u· PEN iG 08:33:08

U PEZ iR 08:34:48

C&GS card 59-64:

08:12:40.0

47.2° N., 153.8° E.

Kurile Islands

h about 33 km

Magnitude 6.5 (Pas), 5.9 (CGS),

6.9 (HVO).

July 24

C&GS card 59-64:

13:13:00.2

11.5° N., 121.9° E.

Panay, Philippine Islands

h about 34 km

July 24

C&GS card 59-64:

10:54:52.5

13.1° N., 145.0~ E.

Mariana Islands

Felt: Guam

h about 43 km

Magnitude 5.6 (CGS).

July 24

A

D

MP

z

z

Z

iP

eP

eP

13:25:08.2 c

07.7 c

08.6 c

M Z eP 11:04:41.5 d

C&GS card 60-64:

06:50:52.8

46.9° N., 153.9° E.

C&GS card 59-64:

13 :25: 18.3

4'7.0° N., 153.7° E.

Kurile Islands

M

A

U

U

U

U

Z iP

Z eP

PEZ iPP

PEE is

PEN eG

PEZ iR

06:59:42.0 d

43.4 d

07:01:41

07:06:53

07:11:13

07:13:13

2

M

A

U

U

U

Z eP

Z iP

PEE eS

PEE eL

PEN eR

13:34:26.5 d

27.4 d

13:41:21

13:45:41

13:4'7:52
Table ~5.--Distant earthquakes--Continued

. .,

July 24--Continued

C&GS card~-Continued

h about 33 km

'Magnitude 5.75-6 (Brk),

5.7 (CGS), 5.7 (HVO).

July 24

July 25-~Continued'

C&GS card--Continued

27.9° S., 70.9° W;

Northern Chile

Felt: Copiapo and Vallenar

h about 26 km

Magnitude 6.5 (Pas), (Brk),

,6.1 (CGS).

C&GS card 59-64:

21:29:33.2

2.9° N., 128G2° E.

North of Halmahera

h about 22 km

Magnitude 5.1 (CGS).

July 28

July 25

U PEZ

M Z iP 13:57:19.9 d

A Z eP 19.6 d'

D Z eP 18.8 d

U Z eP 1987 d

Na Z iP 16.8 d

u PEZ eR 14:11:23

C&GS card 59-64:

13:47:48.6

6.6° S., 154.8° E.

Solomon Islands

h about 62 km

Magnitude 5.6 (eGs).

July 24

M

U

Z

Z

iF

eP

eR

21:41:23.2 d

24.0 d

19:21:40

M Z iP 17:11:49.4 c

U PEE is 17:18:53

U PEE eSS 17:22~19

U PEN iG 17:23:17

U PEZ iR 17~25:21

C&GS card 59-64:

17:02:49.2

47.1° Ne, 153.6° E.

Kuri1e Islands

h about 33 km .

Magnitude 6.5 (Pas), ,6 (Brk),

5 & 8 (CGS ), 6. 4 (HVO).

July 25

Hi Z eP

U PEZ eS

U PEZ eSS

U PEZ eR

M Z Tmax

A Z Tmax

D Z Tmax

Pa Z Tmax

Na Z Tmax

C&GS card 59-64:

19:31:07.0

19~44:29.l d

19:54:51

20:01:59

20:14:15

21:29:05

21:28:55

21:29:04

21:28:38

'21:29:03

23

C&GS card 59~64~

18:40:04c3

51.2° S., 13900° E.

About 1000 km. SW. of

of Tasmaniao

h about 33·km

Magnitude 5.3 (cas) It

July 30

A Z eP 05 :'26: 54. 5 d

D Z eP 55.1 d

MP Z iP 5309 d

u Z iP 54CJ6 d

u PEZ eS 05:35=51

U PEZ eR 05:46:59

C&GS card 59...64:

05:16:03 .. 3

1101° Nn, 86.2° W'o'

N~ar west coast of Costa Rica

Felt: Balboa Heights C. Z.

h about 42 km

Magnitude 5.75-6 (Pal), 5.7

(CGS ), 5. 7 (HVO).
Table 5.--Distant earthquakes--Continued

July 31, 1964

U PEZ iP 06:02:22 c

Hi Z eP 25.2 c

U PEE eB 06:10:28

U PEN iG 06:17:12

U PEZ eR 06:19:40

C&GS card 61-64:

05:52:18.8

6.1° B., 149.4° E.

New Britain

h about 63 km

Magnitude 5.9 (CGS),

6.9 (HVO).

August 2

August 4

M Z eP 17:33:23.7 c

A Z eP 24.9 c

D Z eP 24.4 c

Pa Z iP 25.6 c

Ke Z eP 20.4 c

NB Z eP 23.0 c

U PEZ eR 17:47:20

C&GS card 60-64:

17:24:29.2

46.5° N., 151.1° E.

Kurile Islands

h about 101 km

Magnitude 5.5-5.75 (Brk),

5.9 (CGS), 5.7 (HVO).

C&GB card 61-64:

03:04:16.9

56.1° N., 156.1° W.

Alaska aftershock

h about 33 km

Magnitude 5.6 (CGS).

M Z Tmax 03:49:44

A Z Tmax 47

D Z Tmax 48

MP Z Tmax 43

U Z Tmax 40

Pa Z Tmax 43

Hi Z Tmax 22

August 2

M Z

Ke Z

U PEE

eP

eP

iG

08:43:24.9 c

24.9 c

08:51:34

August 5

M Z iP 11:15:21.8 c

A Z iP 21.1 c

D Z iP 21.1 c

MP Z iP 21.2 c

U Z eP 21.4 c

Pa Z eP 21.3 c

Hi Z iP 24.9 c

NB Z eP 21.8 c

C&GS card 63-64:

11:06:02.6

32.1° B., 179.8° E.

S. of Kermadec Islands

h about 235 km

Magnitude 6.75 (Pas), 5.5

(Brk), 5.8 (cas).

August 5

C&GS c.ard 62-64 :

22:23:13.0

41.1° S., 74.9° W.

Off coast of southern Chile

h about 33 km

Magnitude 6.75 (Pas), 6.5 (Brk),

6.1 (cas).

C&GS card 60-64:

08:36:16.9

56.2° N., 149.9° W.

Alaska aftershock

h about 31 km

Magnitude 6 (Pas), 4.75-5 (Brk),

5.25 (Pal), 5.4 (cas).

24

u

u

U

U

PEZ eS

PEZ ePS

PEZ iSS

PEZ iR

22:47:30

22:49:14

22:54:28

23:07:17
Table 5.--Distant earthquakes--Continued

C&GS card 60-64:

18:24:50c5

56.9° N., 152.1° W.

Alaska aftershock

h about 39 km

Magnitude 5~6 (CGS)~

August 6

M

A

D

M

A

'D

"~:MP

U

Hi

Ha

NB

z

z

z

eP

eP

iP

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

18:31:58.0 d

5805 d

59~0 d

19:11:15

11

22

19

20

19:10:48

19:09:43

19:11:19

August 7

M Z Tmax 09:22:56

A Z Tmax 54

D Z Tmax 52

:MP Z Tmax 48

U Z Tmax 46

Pa Z Tmax 16

Ke Z Tmax 4,6

NB Z Tmax 38

No C&GS preliminary listing

August 8

~1 Z eP 15:09:29.1 c

A Z eP 30~5 c

D Z eP 29.3 c

U Z eP 30.0 c

Hi Z iP 3008 c

NB Z eP 28113 c

August 7

C&GS card 63-64:

07:08:07

54.4° N., 164.4° w.

Unimak Island region

h about 33 km

Magnitude 4.6 (CGS).

C&GS card 60-64:

05:37:25.1,

5608° N., 152.3° Wa

Alaska aftershock

h about 33 km

Magnitude 5Q2 (CGS).

M Z Tmax 06:23 :47

A Z Tmax 51

MP Z Tmax 42

U Z Tmax 48

Fa Z Tmax 50

Hi Z Tmax 22

Ka Z Tmax 01

Ha Z Tmax 06:22:24

NB Z Tmax 06:24:02

August 7

Ha Z Tmax 07: 50: 38

25

C&GS card 60K>l64~

14:59:41.2

31.7° No, 140e2° E.

South of Honshu, Japan

h abou.t 110 km

Magnit'ude 5~ 7 (eGs) It

August 8

M Z eP 15~55:47.0 c

A Z iP 46.3 c

D Z eP 47.0 c

U Z eP 4695 c

Hi Z eP 4501 c

C&GS card 61-64:

15:45:10.9

1205° No, 87.8° W.

Ofr west coast of Nicaragua

Felt: San Salvador

<lh about 63 km

Magnitude 5. 8 (CGS).
Table 5.--Distant earthquakes--Continued

August 12 August 24

COOS card 63-64:

06:51:49.9

48.9° N., 153.7° E.

Kurile Islands

h about 127 km

Magnitude 5.6 (CGS). August 24

, C&GS card 66-64:

17:26:15.1

0.2° N., 123.8° E.

Northern Celebes

h about 127 km

Magnitude 5.4 (CGS).

M Z

D Z

MP Z

Hi Z

Ke Z

NB Z

eP

eP

iP

eP

eP

eP

07:00:33.0 c

34.6 c

35.2 c

33.7 c

30.3 c

33.0 c

M

A

MP

U

Z

Z

Z

Z

iP

iP

iP

iP

17:38:23.1 d

'23.2 d

23.9 d

23.2 d

August 18

U PEZ eP 04:58:09 c

U PEE eS 05:09:25

U PEZ ePS 05:10:27

U PEZ eSS 05:15:33

U PEZ eR 05:27:17

C&GS card 65-64:

00:31:14.1

5.4° S., 154.3° E.

Solomon Islands

h about 383 km

Magnitude 6.0 (cas).

C&GS card 64-64:

04:44:58.0

26.4° S., 71.5° W.

Off coast of northern Chile

h about 8 km

Magnitude 6 (Brk), 6.4 (cas),

6.4 (HVO).

13:58:21.0 d

21.6 d

21.6 d

21.1 d

21.1 d

23.1 d

19.8 d

17.9 d

19.8 d

12.6 c

22.0 d

14:07:33

14:15:11

14:18:41

iP

eP

eP

eP

eP

eP

eP

eP

iP

iP

eP

is

iG

eR

August 25

M Z

A Z

D Z

U Z

Pa Z

Na Z

Hi Z

Ka Z

Ke Z

Ha Z

NB Z

U PEN

U PEE

U PEZ

M Z eP 22:04:21.6 c

A Z eP 22.1 c

D Z eP 23.1 c

MP Z eP 22.1 c

NB Z eP 21.,3 c

U PEZ eR 22:14:41

C&GS card 67-64:

21:56:54.2

58.4° N., 150.3° w.

Gulf of Alaska

h about 22 km

Magnitude 5.8 (CGS), 5.4 (HVO).

26

00:40:13.7 d

12.7 d

13.3 d

13.8 d

09.3 d

09.8 d

12.9 d

00:41:31

00:47:24

00:49:32

eP

eP

eP

eP

eP

eP

iP

iPcP

eS

esS

Z

Z

Z

Z

Z

Z

Z

PEZ

PEE

PEZ

August 13

M

D

MP

U

Na

Ke

NB

U

U

U
Table 5.--Distant earthquakes--Continued

C&GS card 73·-64:

18:41~Ol~8

lOcgO° ~"" 140.2° .E.

West Caroline Islands

h abou.t 33 km

Magnitude 5.1 (CGS), 5.7 (K10)n

C&GS card 69-64:

02 : 53.: 50. 6

5.80S., 154.. 0° Eo,

Solomon Islands

h about 69' km

Maghitude 6.4 (eG·s), 6.3 (Rva) I~

September 5 - ..Con~inued

U PEZ eS 03:11:14

U FEZ iSS 03:15~17

U PEN eGo 03:16:53

U PEZ iR 03~19:01

Ke Z Tmax 04:02:26

Ha Z Tmax 26

NB Z Tmax 58

September 6

18:51:29

19:o6~41

19:09:41

Z eP

PEN eG

FEZ eR

11

U

U

M Z eP 10:45:58.4 d

A Z eP 58.4 d

D Z eP 57.9 d

Ke Z eP 56.2 d

U PEZ eS 10:55~41

U PEZ eR 11:08~29

C&GS card 66-64:

13~4':20.6

78.2° N~, 126.6° E.

East of Severnaya Zemlya

h about 50 km

Magnitude 6.25-6.5 (Pas),

6.5 (Brk), 6.1 (eGs),

6.8 (HVO).

August 25~-Continued

C&GS card 70-64~

lO~34:l3el

400° s., 131~4° E.

West New Guinea region.

h about 33 km

Magnitude 5.5~5.75 (Brk),

5~9 (eGs), 6.1 (HVO).

September 4

September 5

NI Z iP 02:26:2002 c

A Z iP 19.5 c

u Z iP 19.8 c

'Ke Z iP 18.6 c

NB Z iP 19.3 c

C&GS card 70-64~

02:17:14.4

3202° Se, 179~5° E$

South of Kermadec Islands

h about 397 km

Magn.itude 4. 6 (CGS) 0

C&G·S card 72-64:

12:43:19.0

4.40S., 144.0° E.

Near north coast of New Guinea

September 5

M Z

A Z

D Z

U Z

l~a Z

Hi Z

eP

eP

eP

eP

iP

eP

03:03:25.6d

24.8 d

23.9 d

25.4d

22.2 d

28.1 'd

September '12

11 Z eP

A Z eP

D Z eP

Pa Z iP

Na Z iP

Hi Z iP

Ka Z iP

Ke ' Z .iP

Ha Z iP

NB Z eP

U PEE eS

U PEN eG

U PEZ eR

12:53:43.4 c

43e9 c

42.9 c

45,,6 c

41.0 c

454;" C

42.5 c

40.2 c

40.9 c

42,,3 c

13:02:21

13:09:41

13:l2~23

27
Table 5.--Distant earthquakes--Continued

September 12--Continued

C&GS card--Continued

h about 120 km

Magnitude 6.5 (Pas), 6.25-6.5

(Brk), 6.3 (CGS)f

6.1 (HVO).

September 12

September 14

A Z iP 10:24:54.2 c

!vIP Z iP 54.2 c

Hi Z iP 51.1 c

Ka Z eP .48.3 c

Ke Z eP 52.8 c

NB Z iP 53.6 c

M Z eP 15:26:42.4 d

A Z iP 42.2 d

Na Z iP 39.1 d

Hi Z iP 44.6 d

Ka Z eP 45.1 d

Ke Z eP 40.2 d

Ha Z eP 46.8 d

NB Z iP 41.9 d

COOS card 72-64:

10:17:46.6

56.7° N., 157.4° W.

Alaska Peninsula

h about 61 km

Magnitude 5~7 (CGS).

September 14

C&GS card 71-64:

15:19:22.3

17.4° S., 179.9° W.

Fiji Islands region

h about 561 km

Magnitude 4.25-4.5 (Brk),

5.8 (cas).

September 12

C&GS card 72-64:

22:07:03.2

49.1° S., 164.2° E.

Auckland Islands region

h about 33 km

Magnitude 7.5 (Pas),

7. 5 (Brk), 6. 9 (CGS),

6.7 (HVO). 28

September 15

U PEZ iPP 15:48:11 d

U PEZ ePS 15:57:24

U PEE eSS 16:03:50

U PEN iG 16:14:05

C&GS card 72-64:

05:37:45.4

0.1° S., 124.6° E.

Mo1ucca Sea

h about 33 km

Magnitude 5.3 (cas).

05:49:58.7 d

58.7 d

58.9 d

13:43:31.6 c

29.1 c

30.7 c

30.1 c

iP

eP

iP

eP

eP

eP

eP

Z

Z

Z

z

z

z

z

C&GS card 72-E?4:

13:33:33.7

15.0° N., 93.2° W.

Near coast of Chiapas, Mex.

Felt: Western E1 Salvador

h about 64 km

Magnitude 4.9 (CGS).

M

A

U

September 15

M

A

D

U

22:18:56.4 c

55. 4 c.

55.0 c

55.6 c

56.8 c

53.7 c

22:18:50.0 c

22:22:05

22:28:55

22:29:59

22:33:54

22:37:19

22:39:21

22:42:36

eP

iP

iP

iP

eP

eP

eP

ePP

is

iPF8

iSS

eSS

iG

iR

Z

Z

Z

Z

Z

Z

Z

PEZ

PEE

PEN

PEZ

PEZ

PEN

PEZ

M

A

D

U

Hi

Ke

NB

U

U

U

U

U

U

U
Table 5o--Distant earthguakes--Continued

September 15, 1964--Continued September 21-~Contintied

T] PEZ eR 16:19:06

h abo:ut 609 km

Magnitude 50 4 (CC-B.).

September 23

C&GS card 73-64:

15:29:32.2

8.90N., 93010E.

Nicobar Islands region

h about 37 km

Magnitude 5.5 (Pal),

6.2 (eGs) Q

September 16

M

A

D

U

z

z

z

z

eP

eP

eP

eP

05~o6~36.5 c

37.3 c

37.6 c

37. a c

September 24

C&GS card 76-64:

13:59:36.8

43050NG' 12705° We

orr coast of Oregon

h about 1·4 kmll

M Z Tmax 14:41:29

A Z !rmax 17

MP Z Tmax 16

U Z Tmax 17

Pa Z Tmax 01

Ha Z Tmax 14:40~47

C&GS card 76 E3 64:

04:59:47.4

53~6° N., 163~9° W.

Unimak Island regi all .

h about 29 km

Magnitude 5<=5. 5 (Brk).,

5.5 (CGS).

,15:58~0907

16~07:53

16~37~41

31

30

31

22

16:36:50

16:35:56

16~37:31

eP

eR.

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

'Imax

Z

PEZ

Z

Z

Z

Z

Z

Z

Z

Z

September 27

U

1:1

1\1

A

IY1P

U

Pa

Ka

Ha

NB

29

C&G·S card 74-64:

04:23=19.7

21.8° S., 179.6° We

Fiji Islands region

Ni Z eP 04:31:0109 d

A Z eP Ole.l d

U Z iP 01c5 d

Iii Z iF 04~9 d

Ke Z iP 00'l3 d

Ha Z iP 0702 d

NB Z iP 01.,6 d

M Z iP 01~58:17Q4 d

A Z eP 18.1 d

D Z iP 1804 d

Ha Z eP 1005 d

u PEZ eS 02:04:21

U PEZ eR 02:09:13

!~ Z Tmax 02:41~36

A Z Tmax 35

D Z Tmax ~37

U Z Tmax 33

Pa Z Tmax 34

Ha Z Tmax 02:40:l.1

NB Z Tmax 02:41:39

C&GS ca.rd 74~64:

Ol:50:33~9

60.0° N~, 147.10We

Q,.:tlf ·of Alaska

h about 29 km

~1agni tude 5~ 75 (Pas),

5075-6 (Pal),

5u 5 (CGS),

5G8 (HVO).

September 21
Table 5.-~Distant earthquakes~-Continued

September 27,. 1964--Continued

C&GS card 76-64:

15:50:54.7 0

56.60N., 152.0 ~.

Kodiak Island region

h about 27 km

Magnitude 5.25 (Brk),

5.4 (COO),

5.5 (HVO).

September 28

M Z Tmax 16 :25: 00

A Z Tmax 16:24:51

ME' Z Tmax 53

U Z Tmax 53

Pa Z Tmax 39

Hi Z Tmax 23

Ha Z Tmax 20

NB Z Tmax 16:25:12

C&GS card 76-64:

15:43:13.6

43.50N., 127.10W.

Off coast of Oregon

h about 33 km

Magnitude 4.8 (CGS).

30
During the quarter "felt'. reports.", were either phoned or mailed

in by the following persons and agencies, to whom we wish to express our

gratitude for these and other instances -of cooperation:.

Kilauea summit area

Mrs. V" Hansen

Mrs. M. Gorder

Mr. Bo Loucks

Mr. and Mrs. C. Wentworth

Mr. and Mrs. We Mist

Mr. R. Koyanagi

Miss M~ English

Mr9 and Mrse G. Yong

Mr. and Mrs" Ao Yamamoto

North Hawaii

Mrs. E. Lindsey

Mrs. P. Richards

Mrs~ R. Eklund

Mrs" A. Paiva

Dr. F. Tabrah

Geotech seismic station

Mr. Yuen

Mrso Eo Christianson

Mrs. Eo Fergustrom

Mrs. Vredenburg,

Mrs" A'/J Walker

Hila region

Mrs" T. Crabb

Mrs" Ho Lewis

Mr. and Mrsr. Ro Baldwin

Mr. C~ Shoemaker

~1iss E.. Patten.

Mr. Co Okamura

Mrse T. Ingledue

Mrs. Me Shaeffer

Mrs" M" Veriato

Mr. Be B. Blackwood

Mr(O E. Endo

Mr.. So Ho

Civil Defense Office

Mr. H. Pierce

Mr. Jo Bryan

Miss M. Tulley

Mrs. A~ Elliot

Mr" A" Green

31

Mr~ He Warner

Mrs. C. Guerino

Mrs v Ruthve'n

Miss Y Kimura;

Mro G. ,Hay

Mrs. H.. Hoopai

Mr. Edwards

Mrse Kongo Kimura

Mrsc Kimiko Kimura

Mro and Mrso Takahashi.

Mr~ Ro Williamson

Kau

Mrs 0 Ao Paiva

Revo D4 Thompson

Mrs~ Billings

Mr" Hunter

Mrs 0 Ashton

Mrs. Carvalho

Kona region

Miss AQ;Greenwell

Mr.. M. ,Sutherland

Mr" Ra Apple

Miss No Wallace

Mr~ Ett Glass

Mr~ Johnston

Central Hawaii

Pohakuloa Military Camp

Mauna Loa Observatory

Kulani Honor Camp
· UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

HAWAIIAN VOLCANO .OffiERVATORY

SUMMARY 36

October, November, and December, 1964

By

Robert Y. Koyanagi, Arnold T. Okamura,

Willie T. Kinoshita, and Howard A. Powers

OBSERVATORY STAFF

Geology

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

D. L. Peck

R. W. Decker (July-Dec. 1964)

Geophysics

D. P. Hill

W. T. Kinoshita

Georg~ Kojima

R. Y. -Koyanagi

A. T. Okamura

Geochemistry

R. T. Okamura

T. L. Wright

Support

E. T. Endo

J. C. Forbes

W. H. Francis

B. J. Loucks

Akira Yamamoto

Yukie Kimura
Contents

Page

Chronological summary-------------------------------------------------- 1

Tilting of the ground around Kilauea caldera--------------------------- 3

Seismic summary-------------------------------------------------------- 6

Persons or agencies reporting "felt" earthquakes during the quarter---- 30

Publications of special interest--------------------------------------- 31

I'llustrations

Figure 1. Map of the island of Hawaii showing seismograph stations

and localities mentioned in the text-------------------- 2

2. Tilting of the ground around Kilauea caldera between

September 1 and December 14, 1964----------------------- 5

Tables

Table 1. Tilt coordinates at Uwekahuna Vault--------------------------- 3

2. Tilt coordinates and changes at bases around Kilauea caldera-- 4

3. Number of earthquakes and minutes of tremor recorded on

seismographs around Kilauea caldera------------------------- 7

4. Local earthquakes recorded by s'eisrmographs of the U.s.

Geological Survey--------------------------------------- 11

5. Distant earthquakes------------------------------------------- 17
Chronological summary

Relative quiet reigned throughout the fourth quarter of 1964. Modest

net inflation was registered for the period.

A few felt quakes were scattered through October, including one of

magnitude 5.5 located offshore 83 km southwest of Milolii in Sduth Kana.

A spurt of inflationary tilt between October 17 and November 6 was

indicated on the short-base tiltmeter. Total seismicity was very low.

. October 20 marked the beginning of a month of increase in tremor;

several minutes of short bursts and a few spasms of half-hour duration

were recorded almost daily. A swarm of deep Kilauea quakes occurred on

October 28-29; about 60 shocks were record~d, the largest of magnitude

3.5. Tilt drifted erratically during this time and until December 27.

During November 11 through 14 a flurry of small shallow earthquakes

took place along the lower east rift of Kilauea. More than 50 shocks

were recorded at Pahoa, 3 of which were mildly felt near Kapoho.

An earthquake of magnitude near 5 occurred on December 2 at 22:29.

It was reported felt on Oahu and Maui, as well as throughout Hawaii. It

originated from a seismically active zone 30 km beneath Kilauea summit.

An aftershock from the same source with magnitude 4 was felt on Hawaii on

December 3 at 07:56 and a swarm of more than 300 smaller shocks from the

same source, ranging in magnitude from 0.5 to 2.5, continued durtng the

week following. Eight other felt quakes from various source areas were

scattered through December. Scattered bursts of tremor continued and

totaled nearly 700 minutes during December.

The lava lake in Alae Crater solidified completely by early October,

as indicated by temperature gradient and releveling. All level stations

on the lake showed subsidence after the end of September for the first

time; stations above the liquid rose during each relevel period so long

as any liquid remained. Twelve core holes were completed, and the

drilling equipment was removed from the crater on December 16.

A level line and a loop of closure were established on the upper

5 miles of slope to the north edge of Mokuaweoweo caldera on Mauna Loa.

Releveling of this line and loop will yield a measure .'of summit inflation

and deflation. It is logistically impossible to operate the water-level

tiltmeter surveys around the remote summit of the big volcano.

R. W. Decker returned to Dartmouth College in December after

completing 6 months of special studies of a program for monitoring

structural events at Kilauea.

Mr. Rodrigo Saenz R., a scientist from the government of Costa Rica,

has joined the staff at the Hawaiian Volcano Observatory to learn methods

of study that have proved useful here. Mr. Saenz will conduct monitoring

studies of Cost Rican volcanoes when he returns to Costa Rica.
EXPLANATION

• seilmo9raph Station

o Town or locaNty

it R ,j L...f Ib..:f 2,5 Kilometer,

COfltour int.,.. I,OOO flet

O-U'" i' ",oon ... lo.,el

To'..' • ...-, ., US Geototicel Sw",

. 20·

~~gure 1. --Map" of' the is,iand of Hawaii showing seismograph stations

opera~ed by the Geological Survey and loca~ities mentioned in the

text.' Epicenters 'of local earthquakes are given' in terms' of

geographic coordinates, which are indicated at the edges of the

map- 2
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 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

re16tive 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.

Table l.--Tilt coordinates at Uwekahuna Vault, October, November, and December,

'-

Date N-S E-W Date N-S E-W

, ,

Oct. 4 482 476 Dec. 6 482 470

11 482 478 13 483 467

18 482 4,76 20 - 483 465

25 484 472 27 483 465

Nov. 1 486 .. 472

8 487 465

15 483 46.7

22 481 467

29 482 470

3
Table 2. --Tilt coordinates and changes at bases around Kilauea caldera (fig. 2).

Rate (10-6 rad/mo) Date 

Tilt Base Date Tilt coordinates and direction of la"s

J ' .. -tilting since readi

N-S E-W last reading (19

Uwekah1.ma Dec. 10 488.5 455.5 8.2 N. 49.0° w. Aug. 

Tree Molds Dec. 7 451.6 512.7 3.4 N. 23.5° w. Aug. 

Sand Spit Dec. 11 893.2 717.4 9.6 N. 51.1° w. Sept

Kalihipaa Dec. 8 320.4 381.3 3.1 S. 19.3° E. Aug. 

.i<eamC'Ktl Dec. 11 506.1 563.5 3·9 N. 87.8° w. Aug. 

Ahua Kamokukolau Dec. 10 540.7 523.0 12.5 s. 7.2° w. Aug. 

Kipuka Nene Dec. 14 480.4 506.8 0.7 S. 34.3° w. Sept

Hilina Pali Dec. 7 498.0 494.4 0.5 s. 88.5° w. Apr. 

. . .. -'

Ka.papala Ranc:h Dec. 9 493.6 505·9 0.6 S. 81.5° E. Aug. 

Mehana Dec. 10 547.4 552.8 2.2 N. 28.9° E. Sept
o

Kap

•

.KN

• HP

2000

......... TILTING RATE 5.0 X 106 RADIANS / MONTH

SEPT 1J 1964 - DEC 14, 1964

5 KM

Figure 2.--Tilting of the ground around Kilauea caldera, Sept. 1-

Dec. 14, 1964. 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 circles, short-base water-tube tiltmeters.

5
Seismic summary.--Events recorded by the U.S. Geological Survey

seismograph network in Hawaii fall into two categories: local earthquakes

and tremor- originating in the region of the Hawaiian Islands (usually

within 100 km of at least one seismograph), and 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 3. The

earthquakes are separated into groups on the basis of region of origin

as determined by analysis of records obtained daily at the Observatory

(U, M, A, D, N, WP, MP). Earthquakes of magnitude 2.0 or greater are

generally sufficiently well recorded to be located with greater

precision; they are listed individually in table 4. Data on identifiable

phases from distant earthquakes are listed in table 5.

Locations of the seismograph stations are shown on figure 1, and

essential data pertaining to the stations are listed in table Q, Summary 33.

6
Table 3. --Numbers of earthquakes and minut,es of tremor recorded on seismographs U, 

N, WP, and MP around Kilauea caldera

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

amplitudes recorded by seismographs in the summit region. Unless otherwise stated, t

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

Earthquake categories are: HalemaumBu rock slides, wpich are detected by the characte

they on the North Pit seismograph; shallow earthquakes in the Kilauea caldera 

shallow earthquake's a:long the SW. rift zone of Kilauea and the adjacent portion of th

fault system; earthquakes along the eastern half of Kilauea's east rift zon'e (from th

seismograph); earthquakes from a source about 30 km beneath the Kilauea summit region

earthquakes from the ;upper' east rift zone and the adjacent 'fault s'ystems o:f Kilauea's 

flank, earthquake,s from other regions: Kona, Mauna Kea, etc.

Date Tremor

'-J (1964) (in minutes) E'arthquakes

Hale- SW. rift Eastern Kilauea Upper

'p,eep mediate Shallow maumau Kilauea and east summit east 

slides caldera Kaoi'ki rift 30 km rift

Oct. 1 33 ------ ------ 52 10 ------ ;6' 3 

2 53 7 4 1 

------ ----.--- ------ 

3 ------ --- - - ---- 50 6 1 2 

4 ------ ------- ------.- 53 .8 ,2 ,·3 6

5 ---- ____7 ___ ------ 55 5 1 8

6 ------ ------- ------ 33 3 ------ 9 

7 ------ - ------ 45, 6 ------ 'I 4

8 ------ ----i---- ------ 31 5 3

9 ------ ----.--- ------ 30 6 1 4 

10 ---_._- ----_._- -.-.---- . 26 9- -.--.-.-- 1

11 3 : ------- 42' , 8 3 

.. -------
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs U, 

N, WP, and MParound Kilauea caldera--Continued

1 

2 

1 

1 

1 

1 

1

1

3

6+

8

4

6

3

5+

6+

3

6

3

10'

3

3

3'

3

4

4

6

6'

14

II

Upper

east

,rift

8+

76(

3

2

4

,3

2

2+

3 ..

5

8

6

5

4

8

32

27

4

2

4

2

I,

1

.. 1

1

1.

---- 2

1 2

1 4

1

Earthquakes

Eastern Kilauea

east summit

rift . 30 km

1.0

5+

4+., .

14

11

6

10

12

7

16

20

4

55

15

10

',7'6

5

22

16

10

10

10

10

11

12

SW. rift

and

Kao.iki

95

70

40

54

43

45

65

38+

35

62

60

54

65

68

73

76

8:7

65

110

70

75

,43

65

75

95

60

68

Kilauea

caldera

1

1

1

Ha1emau;mau

slides

7

8

-9- .,

24

15

21

15+

2721

--4--- -----

8

9

31 -----

".''! :14 2

16 7

8+

Tremor

(in 'minutes

InterDeep mediate Shallow

5

6

.7

23

-24·

25

26

27; 6

25

29 ±25

Date

(1964) -+- -+- -....- -f--__

30 35

31

Nov. 1 55

2 25

,,3. 25

4 11

Oct. 12

13

14

15

16

17

,- '18

19

20

21
Nov.

8

7 ---- ------ 38

8

3

3

9

6 40

6 J ------

9

5 1 off 

10 17

3 58

8 15

2

11 42 15 ------ 40 13 17 10

12 ------ 50 15 34

5

5 1 Kon

13 ------ 35 13 16

3 ------

14 ---- ... ------ ------ 30 22+

8 1+ 1 ------

15 18. ---- 10 1 43 11 10

2

6 ------

16

6 ------ 56 18

3

3

2 ------

17

2 ------ 43 11

4

8 3 1 East 

18 ------ 66 25

2 1 5 ------

19 ------ 80 13 1 3 - - - - - - 

20

3 ----... - 58 15

3 '2 1 offsh

21 ------ 70 10

7

4 ------

22

9 ------ 45

9

8

3 ------

23 65

2 130+ 11

7

4 ------

24 ------ 70 13 13

6 1 Kana

25 ------ 60

7

4

5 1 Mauna

26 ------ 72 12

3

4

3 1 Maun

27 ------ 65 c./ 5

3 1 Kona 28 12 ------ 65 10

4

4

\0 29 30 ---- ------ 63 1;

5

2 1 Mauna 

30 124 ------ 54+

8 1 3

Dec. 1 61 ------ 25 10

3

4 -------

2

5 ------ 48+ 20 210+

4 .- - ----- - 

3 ---- 33 10 46

4 1 Kana

4 115+ 1 90+- 16

8 31

3

8

2 Mauna 

1 Kana.

5 46±' ------ 70 13 1 22

4 -------

6 85+ 1 80+ 19 12 16

7 47 ------ 45

9 1 7

5 1 :Mauna 

1 Kana

8 ------ 48

8

3

3

4

9 ------ 85 15 2 21 31 -------

-10 ----

2 ----- ------ 58

6 . - 3

3

11 ------ 63 11

7

6 17 1 Mauna 

1 Kohal

38' - - 12

9

3 ------ 17

4

7

3 Mauna 

13 ------ 30 10

3 -'.

8 20 #1 Kana

1 'Maun

a 

1 Mauna 
o

Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs U

N,', WP, and MP around Kilauea caldera--Continued

Date Tremor ;

(1964) minutes) Earthquakes

'. -Inter- Hale- SW. rift Eastern Kilauea Upper

Deep mediate Shallow maumau Kilauea and east summit east 

slides caldera Kaoiki rfft 30 km rift

Dec. 14 --.--- - 3 ------- 30 10 2 4 7 1 

1 

1-5 ---- -_-._- 10 4 65± 14 .-,--- 2 3 -

16 ---- ----- ------ 2 68 11 1 2 7 1 

17 ---- .... - ... _- 7 ------ 61 6 ---- 2 9 1 

----- 33 8 ------ 25 11 ---- 1 .i 7 1 

19 ----- ----- 3 ------ 25 (? ) 2 2(? ) 1 -

2·0 9 'II ------ ------ 45+ 1+ ---- 2+ 2+ -

\ ----- 3 1 40 6 ---- 1 ---- -

22 ----.- 12 ------ ------ 50 3 4 2 3

2:3 ---- ----- -------- ------- 75 6 1 14 12 -

---- -----

: 15± ------ 94 13 ---- 4 5 -

2;'5 _-.-- . 4 ------ 115+ 8 3 5 2 1 

q6 3 ----- ------ ------ 98 8(? ) ---.-- 5 ----

27 --_.-. 7+ ------ ------ 114+ 14 3 2 4 1 

28 2 ----- ------ 1 91 9 2 3 4 -

29 3(? ) 122 11 4 5 

----- ------ ------ ----

30 ---- 4+ ------ ------ 125+ 4 1 4 13 -

31 30 ----- ------ ------ 148 6(? ) 2 1 4 -

.,
Table 4.--Local earth uakes recorded by seismo raphs of the U.S.

October November, and December 1

Sur

Entries for a given quake are: date, origin t..ime (Hawaiian Standard Time), magnitu

and felt report. All earth'quakes of magnitude 2.5 and ,larger, as well as many fa

smaller ones, occurring on or near the island of Hawaii are included in the list.

In the following list, some origin are followed only by, "KM 30" and a stateme

The'se are all 'members of a continuing family of quakes·noted also in other 

mean focus for this group :Ls beneath Halemalfmau at a depth of 30 km ,(19°24.1' N.,' 

The mean focus of the magnitude 6.1'Kaoiki fault system earthquake of June 27, 1962

is:19°24,' Nc, .155°25' W., at a depth of 3-8 km. This focus has 

Date Time

h' m 'S tude

.,

Depth Epicenter (km) ..... 

V

P

18 km-SE. of Kealakekua

14 km of MakaopQhi

seismome,tert>

3

8

3

8

8 19°23.2 i

3 19°21c3 1 'j

19°12.0' 155 0 35.0' 15 km N. of' Naalehu

19°59.4' l55°1707' 7 km W. of'Laupahoehoe

19°11.8' 155°27.9" 2 km ESE. of Pahala

"19° 18.9' 155° 12.8" 8 km SW. of Makaopuhi

seismometer.

B" 19°'16.8'.155°'13.71 11 km SW. of Makaopuhi

seismometer.

19°23.5' 155°05.21 12 km ENE. of Makaopuhi

.seismometer.

19° 57e 3' 155°'48.5'" 16 km SW. of Kamuela

19°'24.3' 155° 04.1' 13 km ENEe .of Makaopuhi

seismometer.

--- -------- --------- KM

19° 17c '4' 155° 10. 3,t 5 km NEt of ,Apua Point

19° 51'.1 t' 155°33. '8,:t 24 km SSE. of K'amuela

18°47' 156°37' " ofI·iilolii

-------- IKM

19° 2 f 1550 8:' I 14 km, NE.. of Kea19ikekua.

-------- --------:..·-r Y1yj 30----·----.:.- -------

3

8

13

2.2

2.0

2.0

5·5

3.0

2.0

3.4

2.4

2.0

2.Q

2.0

3.3

2.4

'2. a

2.1

19 13.5

0'7 53. a

09 32.2

18 06.,0

59 33.2

39 '37.4

35 34.4

2'6 39· 5

48

36 10.0

56 29·0

41 58.5

31 14.0

06 42.8

48 11.7

15 46.0

43 55.0

6 14

.6 1.8

14 22

16 01

,6

7 09

8 06

'9 05

9 23

11 00

12 01·

12 22

14 08

Oct.:l 15

·1 17

·2 oB

-6,)6
Table 4e--Local earth uakes recorded by seismo raphs of the DeS. Geol0 ica1 Survey

October, November, and December, 1 --Continued

Date Time Magni- Dept!: . Epicenter 

(1964) tude (km) 

h m s Lat. N. Long. w. Description

- - -

Oct. 17 16 20 17.2 3.7 5 19°19.8' 155°05.7' 11 km ESE. of Makaopuhi 

seismometer. 

20 11 38 22.3 3.3 --- -------- ---------- KM 

22 11 45 37.4 2.8 45 19°13.8' 155°18.8' 15 km SE.of Desert 

seismometer.

23 06 58 49.3 2.6 8 19°19·9' 154°59.5' 3 km SW. of Kalapa.na 

23 19 13 26.6 3.6 30 19°01.1' 155°24.8' 20 km ESE. of Naalehu 

25 23 53 35e4 2.4 35 19°11.4' 155° 08.5' 20 km SSE. of Makaopuhi 

seismometer.

26 23: 27 05·0 2.3 3 19°22.0' 155°53.8' -2km SSE. of Hookena 

27 09 55 59.0 3.7 --- -------- --------- KM 30----------------- 

27 20 15 38.0. 2.3 --- -------- ---------- KM 30----------------- 27 20 58 59·0 3.2 8 19°23.2' 155°49.4' 9 km E. of Hookena 

28 14 50 58.7 "2.0 --- -------- --------- KM 30-----------------

29 0(\ 55 59.6 2.2 --- -------- ---------- KM 30----------------- 

29 03 00 00.3 2.4 --- -------- --------- KM 

29 06 06 14.3 2.0 --- -------- -.- - --- --- KM 30----------------- 

29 10 19 46.9 2.4 30 19°01.1' 155°29.8' 11 km ESE. of Naalehu 

29 16 10 58.7 2·9 --- -------- --------- KM 30--"-- --- - - -'--- - --- 29 16 47 50.1 2.0 --- -------- --------- KM 

30 18 26 14.2 2.2 10 19°17.8' 155°09.6' 9 km SSE. of Makaopuhi 

seismometer.

30 19 18 02.9 2.0 8 19°23.6' 154°59.0' 12 km SW. of Pahoa 

31 05 35 48.5 2e9 8 19°11.0' 155°39.0' 14 km NNW. of Naalehu 31 11 23 27.7 10 19° 18.3 t " 155°10.2' 7 km S. of Makaopuhi 

seismometer.

Nov. 1 00 41 50.1 2·5 3 19°55·0' 155°40.0' 16 km SSE. of Kamuela 

1 17 54 32.8 2.5 3 19° 53·0 ' 155°36.2' 20 km SEe of Kamuela 

4 11 47 46e7 2.1 15 19°21e7' 155°28.0' 9 km WNW. of Desert 

seismometer.

4 13 45 28.3 2.7 5 19°30.0' 155°42.8' 22' km E. of Kealakekua 

4 21 18 53.1 3.2 --- -------- 

.f. 'l

5" 04 44 48.9 2.1 --..,

5 ,06 16 47e5 2.6" 5 19°25rl' 155°01.1' 11 km SWo of Pahoa-......
Nov.

6 05 27 37.9 2.5 -------- --------- . KM 30--------------- 

7 22 46 20.3 2.0 -------- --------- KM 30---------------

9 13 47 17.4 2.3

5 19°17.0' 155°01.1'

9 km SW. of Kalapana --

10 06 26 25·5 2.0 3 19°25.0' 155°04.0' 14 km ENE. of Makaopuhi --

seismometer.

10 23 25 28.7 3.4 ---------- .._--- Kaoiki--------------- Pa

11 22 46 25.6 2'.2 -------- --------- Kaoiki--------------- --

12 01 24 26.1 2.8

8 .19°38.7' 155°59.2' 1 km E. of Kai1ua----

12 03 00 32.7 3.1

8 19°23.5' 154°56.4' 12 km S. of' Pahoa---- Fe

12 22 08 10.7 2.5 3 19°26.0' 154°54.6'

8 km SSE. of Pahoa--- Ka

14 15 53 18,.5 3.3 -------- --------- Kaoiki--------------- Fe15 09 56 25.

4 35 19°26.5' 155°14.6'

5 km ENE. of Uwekahuna

seismometer.

17 17 04 16.0 2.5 3 20°04.9' 155°27.8 t', 1 km SEe of Honokaa

18 03 15 29.0 3.0 10 ' 19°18.1' 155°10.0'

7 km SSE. of Makaopuhi --

seismometer.

20 16 17 24.0 3.2 13 19°10' 156°20' 59 km SW. of Kealakekua --

21 14 55 09·0 2.3 -------- --------- KM 30----------------- --

24 01: 54 12.3 2.7 -------- --------- KM 30----------------- Pa

24 03 41 15:.3 ',10 19°18.1' 155°10.9'

6 km S. of Makaopuhi --

seismometer.

L-U 24 06, 50 41'.0 3:2

8 '19°27.6' '155°56.7'

9 km SEe of Kealakekua

24 16 12 41.1 2.4 10 19° 18. 6' 155° 00.6" 6'krn SW. of Ka1apana --25 22 10 32.4 2.1 10 19°17.5' 155°09.8'

8 km SSE, of Makaopuhi --

seismometer.

25 23 41 25.8 2.2

8 '19°49.1' 155°15.9" 23 km WNW. of Hil0

26 18 00 21,·5 2.7 Shalla -19°25.6' 155°41.5' 1'5 km SW. of North Bay

depth seismOmeter..

27 13 46 14.0 3 19°22' 156°17' 43 km wsw. of Kealakekua

29 '07 11 51.0 2.3 3 19°11.8' 155°40.4' 18 km NW. of Naalehu --

29 16 42 39.3 2.0 3 19°17.9' 155° 28 ..2' # 10, km WSW. of Desert Pa

seismomet'er.

Dec. 2 04 12 32.0 10 '190 15.6' .. 5' 1.4 km 'of 'Makaopuhi

i<

2 28 '40.0 4i"7 -------- KM Ha

2, 22; 4'3.'3" 3'.5 ,\

--

....

---- KM Vo

_______ C'W

2 22: 34

8 2.4 --------- ---------- KM 30-----------------

2 22- 46.2 2.3 -------- ________ KM

2 22 44 03.4 2.0 -=-_c;IIlI __ __ ____ c::s KM

2 22 48 2.3 -------- ---------=- KM 30-----------------
Table 4.--Local earth uakes recorded b seismo raphs of the U.S. Geolo ical Survey

October, November, and December, 19 4--Continued

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h m s Lat. N. Long. w. Description

- - -

Dec. 2 23 05 11.8 2'.1 ---- ..----- ---_.. KM 30-----------------

2 23 11 11.3 2,.7 --.- ... -------- 101 30----------------- --2 23 13 16.3 2.0 --_.-. -------- -------- KM 30-----------------2 23 13 37.7 2.2 ---- - .. _----- -------- KM 30-----------------

2 23 20 32.5 2.0 ----- -------- ------- KM 30-----------------

3 00 15 35·9 2.8 ---- ---------- -------- KM 30----------------- Pa3 01 19 09.3 2.0 ---- ------- KM

.3 01 22 42.5 2.1 ---- ------- ------- KM

3 01 24 48.3 2.0 30 19°16.3' 155°18.2' 12 km SE.of Desert --

seismometer.

3 01 35 2.1 --... - -------- KM 30----------------- --

:3 05 54 40.8 2.7 ---- .... _------ KM 30-----------------

3 07 56 00·5 4.0 ---- --------- ------- KM 30----------------- Vo

,3 12 17 04.0 2.0 3 19°32.1' 155°57.1' 5 km WNW. of Kealakekua --

" 3 12 19 2".0 8 19°17.9' 155°10.5' 8 km s. of Makaopuhi

seismometer.

'3 15 40 2,.3 ---- --------- --------- KM 30------------------ --

.3 18 24.0 2.·5 ---- -------- ---------- --

4 02 01 45:9 2.0 -_._- -------- KM --

:'4 03 16 35.8 2.1 ---- -----_ .... - ---------- KM --

4 04 24 19·0 2 5 19°30.5' 155°48.1' 13 krri of Kealakekua --

4 12 17 42.7 2·5 10 19°11.4' 155°37.9' 15 km NNW. of Naalehu4 12 36;1 2,.6 8 19°11.8' 155°37.)..' 15 km NNW. of Naalehu--

i6 52 04.8 2.3 40 19°27.6' 155°05.9' 110 'km SSW. of Mt. View .- -

6- 20 06, 57 .. 4 2.2 5 19°20.5 1 155°03.5' 14 km ESE. of Makaopuhi,

seismometer.

,7 03 24 12 .. 6 2.8 :8 19°29.1' 155°50.9'· 9 km ESE. of Kealakekua

7 06 13 38.0 0 13 19°26.6' 155°36.2' 6 km ssw. of North Bay

.,

seismometer.

8 23 37 09.9 2... 0 '19°19·3 i 7 km ssw. of Ahua

seismometer. '

9 00 00 30.1 2.0 __ eK_ .... ___

10 01 53 45·0 5·0 10 1550 12. 2' 7 km SWe of Mak,aopuhi 

seisrnometer" 
Dec. 10 02 03 03.2 2.3

5 19°16.7' 155°12.1' 10 km SW. of Makaopuhi

seismometer.

10 04 12 04.2 2.4 10 19°18.1' 155°11.6'

7 km ssw. of Makaopuhi ----

seismometer.

10 05 52 04.6 3.2 -------- --------- KM 30----------------- Hil0

a

11 03 51 43.6 2.7 10 19°52.1' 155°22.8'

7 km SW. of Keana.ko1u ---

11 20 07 18.0 3.4 10 20°06.0' 155°53.1'

9 km NW. of Ka:t:'-aihae Ka

12 17 20 56.4 2.1 3 19°28.5' 155°36.0' Mokuaweoweo Caldera

12 20 33 09.2 2.1 13 19°41.0' 155°38.1' 15 km SW. of Pohaku1oa12 23 21 14.7 2.4

8 19°27.2' 155°26.4'

7 km SW. of Mauna Loa ---

seismometer.

13 02 14 00.5 2.1 3 19°59.1' 155°34.1' 14 km ESE. of Kamuela13 16 26 56.3 2.3 10 19°12.0' 155°36.1' 15 km N. of Naalehu ---

13 19 30 19.7 3.8 3 19°23.3' 155°49.7'

8 km E. of Hookena Vol

14 04 37 27.9 3.4 10 19°39.3' 155°12.2' 15 km wsw. of Hi10 Hil

14 07 03 14.8 2.3 10 19°22.8' 155°12.7'

6 km E. of Ahua

seismometer.

14 10 19 03.4 2.1 -------- --------- KM 30-----------------

14 13 21 32.8 2.3

5 19°47.5' 155°57.7'

4 km WNW. Puuwaawaa ---

15 07 30 38.2 2.5 10 19°21.1' 155°12.8'

4 km wsw. of Makaopuhi ---

seismometer.

V1 16 09 16 18.0 2.5 Shallow 19°31.1' 155°50.8'

8 km E. of Kealakekua ---

depth

17 oB· 11 46.0 2.4 13 .19°55.9' 155°33.9' 17 km SEe of Kamuela ---

17 11 47 46.9 3.2 -------- --------- Kaoiki--------------- Pah

18 20 14 34.7 2.0

8 19°11.2' 155°26.9'

4 km ESE. of Pahala ---

18 21 46 51.5 2.8 30 20°09.1' 155°49.0' 17 km NW. of Kamuela

24 03 18 27.1 2.2 -------- --------- KM· 30---------------- ---24 06 4'3 2.4 -------- --------- KM24 14 39 59.6 3.2 -----_..- --------- Fel

24 17 39 25.9 2.1

5 19°21.8' 155°12.5'

5 km W. of Makaopuhi

.

25 13 23 49.5 2.4 10 25· 3' 155°34.7'

8 km S. of North Bay ---

.

13 54 28.

0 2.5 -------- ---------- Kaoiki--------------

25 14 23 07.5 2.6 .' -------- --------- Kao{ki--------------

26 13 38 02.3 2.1 -------- ---------
I-'

0\

Table 4.--Local earth uakes recorded b

October, November,

Date Time Magni- Depth Epicenter 

(1964) tude (km) 

h m s Lat. N. Long. w. Description - - -

Dec. 27 10 11 01.2 2.8 8 19°52.0' 156°07.8' 16 km NW. of Keahole Poi

27 20 16 37.7 2·5 --- -------- --------- Kaoiki----'- --- --- - - -- ---

30 04 3°' 31.0 2.3 8 19°18.7' 155°13.6' 8 km SW. of Makaopuhi 

seismometer.

31 01 31· 51.7 2·5 10 19°18.8' 8 km SEe of Makaopuhi 

seismometer.
Table 5.--Distant earthquakes

Times are reported in Greenwich Civil Time which is 10 hours faster than

Hawaiian Standard Time. A "c" following the time of P indicates

compressional first motionj a "d" indicates dilatational first motion.

Station symbols, locations, and instrumentation are presented in· table 6.

Magnitudes calculated from the Haw~ii seismograms are followed by (HVO)Q

Location of epicenter, origin time, focal depth, and magnitudes repo~ted

by other institutions are taken frbm-'''Preliminary Determination ofEpicenters" published by the U.S. Coast and Geodetic Survey.

October 1, 1964

C&GS card 76-64:

11:00:48.3

43.5° N., 126.9° W.

Off coast of Oregon

h about 33 km.

Pa z Tmax 11:41:25

October 2

A Z Tmax 23:14:48

D Z Tm.ax 23:15:06

WP Z Tmax 23:14:46

MP Z Tmax 23:14:46

U Z Tmax 23:14:53

Pa Z Tmax 23:14:34

NB Z Tmax 23:15:03

Ha Z Tmax 23: 13:'30

October 2

C&GS card 79-64:

18:30:01.9

49.3° N., 128.8° W.

Vancouver I.sland region

h about 9 km

Magnitude 4.5-4.75 (Brk)

5.3 (eGS').

A Z iP 13:09:37.2 c

D Z iP 36.2 c

WP Z iP' 37.2 c

MP Z eP 37.7 c

U Z eP \ 37.~ c

Pa Z eP 38.9 c

Na Z eP 33.9 c

Hi Z iF 39.8 c

NB Z iP 36.0 c

Ha Z iP 13:09:36.0 c

U PEZ eS 13:16;54

U PEZ eR 13:24:30

October 1

PEZ eR 07:53:22

U PEZ ePP 14: 51:4.2

U PEZ ePPS 15:02:50

U PEN eBB 15:08:26

U PEE eL 15: 1 9: 4?

October 6

C&GS card 78-64:

07:17:57.1

36.2° S., 100.9° W.

Southern Pacific Ocean

h about 33 km

Magnitude 5.5 (CGS)e

u

October 6

C&GS card 78-64:

22:23:32.4

59.7° N., 144.5° W.

Gulf of Alaska

h about 22 km

Magnitude 5.2 (CGS.).

Pa z Tmax 19:15:06

e&Gs card 77-64:

13:00:39·7

10.5° s., 162.4° E.

Solomon Is.lands

h about 68 km

Magnitude 6.0 (eGs)

6.0 (HVO). 17
Table 5.--Distant earthqUakes--Continued

October 6, 1964-'-Continued

C&GS card 79-64:

19:38:47.7

60.4° N., 14601° W.

Southern Alaska

h about 44 km

Magnitude 4.5-4.75 (Brk),

5.3 (eGs).

C&GS card 81-64:

14:31:19.2

40.3° N., 28.2° E.

Turkey

19 killed, several injured;

extensive property damage in

western Turkey.

Felt widely throughout Black Sea

region.

h about 10 km

Magnitude 6.75-7 (Pas), 6.75-7

(Brk), 6.25 (Pal),

6.0 (eGs), and 7.2 (HVO

C&GS card 78-64:

20: 06: 39.8

60.5° N.. , 145.4° W·.

Southern Alaska

h about 31 km

Magnitude 5.4 (CGS).

October 12

October 12

M Z eP' 15:54:49.9 d

A Z eP 50.1 d

NB Z eP 49.1 d

U PEZ eS 16:04:41

U PEZ eR 16:19:01

C&GS card 81-64:' 09:14:52~2

55.9° S., 144.1° W.

South Pacific Cordillera

h about 33 km

Magnitude 5.3 (eGs).

M Z Tmax 10:49:41

A Z Tmax 48

D Z Tmax 51

WP Z Tmax 47

MP Z Tmax 42

U Z Tmax 43

Pa Z Tmax 36

C&GS card 81-64:

21:15:03.9

0.6° S., 121.7° E.

Northern Celebes

h about 33 km

Magnitude 6.25-6.5 (Pal), 6.3

(eGs), 6.3 (livo).

October 11, 1964

M z iP, .

~1:27:32.9 c

D Z eP 32.4 c

MP Z eP 33.6 c

U Z eP 33.0 c

Na Z eP 3'1.2 c

Hi Z eP 34.2 c

Ke Z eP 29·2 c

U PEN' eS 21:38:01

U PEN iG 21:49:17

U PEZ eR 21:53:41

19:46:31.8 c

32.3 c

32.8 c

,20:14:24.1 c

24.6 c

25.1 c

24.4 c

eP

eP

eP

iP

iP

iP

iP

z

z

z

z

z

z

z

October 10

October 10

M

A

D

M

A

D

Ke

C&GS card 81-64:

15:42:54.7

3.0° N., 126~7° E.,

Talaud Islands

h about 59 km
Table 5.--Distant earthquakes--Continued

October 15

'20:35:56.8 c

58.3 c

20:43:39

,20:48:11

20:50:35

October 12, 1964--Continued

C&GS card--Continued

Magnitude 5.75-6 (Pal), 5.9 (CGS),

and 5. 9 ~HVO).

October 12

M Z eP 22:06:20.1 c

A Z eP 18.9 c

D Z eP 19.4 c

MP Z eP 18.7 c

U PEN eS 22:15:11

U PEE eL 22:22:41

U PEZ eR 22:25:41

C&GS card 79-64:

21:55:33.2

31.3° B., 110.8° w.

Easter Island region

h about 25 km

Magnitude 6.25 (Pas)

6.25 (Brk)

5.75 (Pal)

6.0 (CGS), 5.9 (HVO).

October 13

U PEZ eR 11:05:36

C&GS card 80-64:

10:38:59~3

3.3° s., 149.9° E.

Bismarck Sea

h about 59 km

Magnitude 5.1 (eGs).

October 14

M Z eP

MP Z eP

U PEE eS

U PEE eG

U PEZ eR

C&GS'card 80-64:

20:26:53.5

44.7° N., 149.8° E.

Kurile Islands

h about 49 km

Magnitude 5.2 (CGp), 6.'7 '(HVO).

October 15

M Z Tmax 23:46:09

A Z Tmax 16

NP Z Tmax ' ,,'" 06

WP Z Tmax 03

MP Z Tmax 05

U Z Tmax 09'

Pa Z Tmax 05'

Hi Z Tmax ,23:45:38

NB Z Tmax ,23:46:24

Ha Z Tmax "23: 44: 39

COOS card 80-64:

22:59:43.6

56.8° N., 151.9° w.

Kodiak Island ~egion

h about 33 km

Magnitude 5. 2 (CGS).

October 16

C&GS card 79-64:

03:04:59.6

33.4° N., 141.8° E.

orr east coast of Honshu, Japan

h about 33 km

Magnitude 5.6 (eGs).

07:08:46.3 c

47.1 c

47.5 c

07:16:11.

07:20:59

07:23:21

U PEZ eR 03:31:17

19

M Z eP

D Z eP

MP Z ePt

U PEE is

U PEE iG

U PEZ eR

C&GS card 81-64:

06:59:38.6

44.3° N., 149.5° E.

Kurile Island

h about 33 km

Magnitude 5.5 (eGs), 6.5 (HVO) v
Table. 5.--Distant earthquakes--Continued

October 16 October l8--Coptinued

M Z eP 08:27:35.5 c C8cGS card 83-64':

D' Z eP 36.0 c 12:32~24.1

·MP Z eP 36.8 c 7.0° S., 124. '0° E.

Pa. Z eP 37.2 c Banda Sea

NB Z eP 34.8 c h about 574 km

U FEE is 08: 34: 59' Magnitude 5.8 (CGS).

U PEE eG 08:39:41

U FEZ eR 08:42:21 October 23

October 24

C&GS card 85-64:

21:06:24.2

44.0° N., 147.5° E.

Kuri1e Island's

h about 45 km

Magnitude 5.9 (CGS).

C&GS card 85-64:

01:56:03.2

19.8° N., 56.0° Wo

North Atlantic Ocean

h about 31km

Magnitude,6.75 (Pas)

6. '5 (Brk)

6.4 (CGS).

02:34:01

02:38:12

i·

PEN 'iG

PEZ eR

PEZ eR

October 23

u

u

u

October 16

C&GS card 83-64:

08 :18 :28. 3 '

44.6° N., 149.4° E.

Kurile Islands

h about 33 km

Magnitude 6-6.25 (Pal),

5.2, (eGs), 6.5 (RVO).

M Z eP 09:27:28.3 d

D Z eP 28.9 d

MP Z eP 29.8 d

U PEE :LS 09:34:59

U PEN eG 09:39:41

U PEZ eR 09:41:57

C&GS card 81-64:

09: 18 :16. 6 .

44.5° N., 149.1° E.

Kurile Islands. ,

h about '33 km

Magnitude 5.4 (CGS).' 6.5 (RVO).

October 18

M Z iP 12:43:57.1 c

A Z iP 57.6 c

D Z iP 57.0 c

NP Z iP 57.6 c

WP Z iF 57.7' ':

MP Z iP 57.8 c

u Z iP 57.8 c

Na Z iP 55.9 c

Hi Z iP 59.~ c

Ke Z iP 55.0 c

NB Z iP 57.0 c

M Z Tmax 07:25:33

A Z Tmax 36

NP Z Tmax 33

WP Z Tmax 3l

U Z Tmax 3~ Pa Z Tmax 19

C&GS card 87-64:

06:44:38

44 ) ° 0 • 4 N., 130.0 W

orr coast of Oregon

h about 33 km

Magnitude 4.7 (eGs).

20
Table 5.--Distant earthquakes~-Continued

October 25 November 1

- I ,

12:55:09.9 c

',10.2 c

.10.4 c

,08.7 c

12:37:51.9 c ..52.0 c

.52.4.c • ' .• I. '52.7 c

' .. 52.1 c

. '. ',".' ~8. 9 c

'51.2 c

05:,42: 31

30

49

32 ,. ·.33

36

43 , ',58

05:,41~ 56

M Z eP

A Z eP

MP Z eP

NB Z eP:

C&GS card 88-64:

12:43:04.7

0.1° N., 123.7° E.

Northern Celebes

h about 149' km .

Magnitude 5.4 (eGs}.

November 3

M - Z iF

D Z iP

NP Z eP . '

MP Z eP

U Z eP

Ke Z " eP

NB Z eP , .

C&GS card 88~64: , 12: 26: 06.2 ' 3. 1° I~. " 128. 1° E.

North of Halma:hera

h about 65 km

Ma.gnitude 5. 75-6.(Pal), 6.3 (CGS).

M Z Tmax

A Z Tmax

D Z Tmax

'NP Z Tmax

U Z Tmax

Pa Z Trnax

Hi Z Tmax

NB Z Tmax

Ha Z Tmax

C&GS' card 85-:-64: 04:55:47~4

51~ 8° N., 130. ~o W." .

Queen Charlot,te Is1ands.'--region

h about 33 ){m

I 'Magnitude 4.9 (eGs).

,November 1

21.:

12:16:33.1 c

32.2 c

32.7 c

32.8 c

32.8 c

32.8 c

34.2 c

29.4 c

35.7 c

31.1 c

32.5' c

38 .. 0 c

M Z iP 14:34:55.4 d

A Z iP 55.5 d ,

WP Z iP 55.6 d

C&GS card 86-64:

14:22:57.8

2.2°' N., 126.8° ·E.

Mo1ucca Passage

h about 48 km

Magnitude 6.0 (C~S).

Octobe~,26

M Z Tmax 15:19:15

Ha Z Tmax 15:17;47

C&GS card 84-64:

14:32:49.3

56.8° N., 152.. '3° 'w.

Kodiak Isla nds re.gion

h about 33 kill

Magnitude 5.0 (CGS )~

October 27

U . PEZ' eR 22:'19: 19

C&GS card 84-64:

21:24:31.. 2

45.6° S., 96.1° E.

Southeast Indian Rise

h about 33 km

M Z iP

D Z eP

NP Z iP

WP Z iF

MP Z iP

U Z eP

Pa Z eP

Na Z iP

Hi Z iP.

Ke Z iP

NB Z eP

Ha Z iP

C&GS card 85-64:

12: 08: 46.9 '

21.7° B., lY9.2° W.

Fiji Is1apdsregion

h about 534.km

Magnitude 5. (C~S).

October 26
Table 5.--Distant earthquake--Continued

November 6, 1964 November 16--Continued

COOS card 93-64:

09:53:22.4

44.4° N., 149.0° E.

Kurile Islands

h 'about 60 km

Magnitude 5.5-5.75 (Pal),

5.7 (eGs).

November 8, 1964

November 17, 1964

C&GS card 96-64:

02:46:43

36.9° N., 121.8° W.

Central California

Minor damage at Corralitos,

Morgan Hill, San Jose and Santa

Cruz.

h about 33 km

Magnitude 5.25 (Pas)

5 (Brk)

5.2 (eGs).

26

03

Z Tmax

Z I Tmax

NB

Ha

10:17:10

02:55:50.9

03:06:53

03:10:45

03:19:29

eR

eP

ePPS

eSS

eR

PEZ

Z

PEN

PEN

PEZ

u

MP

U

U

U

COOS card 93-64:

02:43:57

49.0° S., 163.7° E.

Auckland Islands region

h about 33 km

Magnitude 6.5 (Pas),

6.25-6.5 (Pal),

6.3 (HVO).

C&GS card 103-64:

05:33:29

18.2° S., 176.4° w.

Fiji Islands region

h about 107 km

Magnitude 5.2 (eGs).

November 12

November 16

M Z iP 08:25:34.9 ·c.

A Z iP 34.9 c .

D Z iP 34.1 c

WP Z iP 35.0 c'

u Z iP 35.1 c

Na Z iP 32.1 c

Hi Z eP 37.2 c

Ke Z eP 31.9 'c

NB Z iP 33.8 ;c

Ha Z iP 34.2 d

U PEZ iPP 08:27:38

U PEE is 08:33:42

U PEZ eSS 08:37:25

U PEN iG 08:39:43

U PEZ iR 08:42:19

e&GS card 92-64:

08: 15: 39.3

5.70S., 150.7° E.

New Britain region

h about 45 km

Magnitude 7.25 (Pas), 7-7.25 (Brk),

6.7 (eGs), 7.25 (HVO).

05:51:50

03:29:10

15

26

24

23

03

10

03:29:00

09

eG

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

PEN

z

z

z

z

z

z

z

z

z

u

M

A

D

NP

WP

MP

U

Pa

Ka

22
Table 5.-~Distant earthquakes--Continued

November 17, 1964

M z iP

A Z iP

D Z iP

WP Z eP

MP Z iP

U Z iP

Pa Z iP?

Hi Z eP?

NB Z eP

Ke Z iP

November 19

11:11:04.0 d M Z iP 23:45:09.0 c

03.7 d A Z eP 09.3 c

03.1 d D Z eP 08.1 c

03.4 d MP Z eP 09.5 c

03.7 d Hi Z eP 11.1 c

03.5 d Ke Z iP 05.8 c

05.1 d U PEN is 23:53:16

06.2 c U PEN .. iG 23:59:24

03.9 d U PEZ iR 00:02:16

01.9 c

C&GS card 96-64:

11:03:06.8

23.4° S., 179.9° w.

South of Fiji Islands

h about 549 km

Magnitude 5.5 (eGs).

November 17, 1964

C&GS card 95-64:

23:35:06.0

6.0° S., 150.80E.

New Britain region

Slight damage at Walindi

h about 3 km

Magnitude 6.75 (Pas)

6.75 (Brk)

6.0 ~CGS), 6.7 (RVO).

e&Gs card 92-64:

14:34:54.5

6.00 S., 148.2° E.

New Britain region

h about 49 km

Magnitude 6.1 (CGS)

6.25 (HVO).

eMS card 92-64:

17:40:57.4

0.10S., 122.9° E.

Northern Celebes

h about 160 km

Magnitude 5.4 (eGs).

November 18

3

02:28:35.4 d

36.0 d

23: 42.: 13.9

15.4

23:54:52

00:00:24

eP

eP

z

z

Z eP

Z eP

PEN eG

PEZ eR

November 21

A

MP

C&GS card 93-64:

23:33:08.9

44.6° N., 149.7° E. . Kurile Islands

h about 33 km

Magnitude 5.6 (CGS), 6.2 (RVO).

M

MP

U

U

C&GS card 95-64:

02:16:44.5

1.00 N., 124.00E.

Northern Celebes

h about 248 km

Ma.gnitude 5.8 (CGS).

November 20

14:45:05.4 c

04.6 c

06.3 c

04.4 c

01.3 c

03.5 c

15:00:13

15:03:05

17:53:04.3 d

03.7 d

04.4 d

iP

iP

eP

eP

eP

eP

eG

iR

iP

eP

iP

z

z

z

z

z

z

pm

PEZ

z

z

z

M

A

WP

M

D

Hi

Ka

Ke

Ha

U

U
"Tc~:q1e 5..--Distant earthquakes.--Continued

• -·... 1 •• '. _ • - ••

November 22" 1964 ...

M Z iP 02:45:45.0 d

A Z iP 44.6 d

MP Z iP 45.0 d

Pa Z eP 46.7 c

Na Z iP 41.2 c

Hi Z iP 02:45:47.4 c

Ke Z iP 42.7 c

NE Z . iP 44.5 d .

Ha Z iP 49.7 c

November 24

C&GS card 92..,,64:

22:15:47.0

0.10B., 124.5° E.

Molucca Sea

h abollt 66 km

Magnitude 5.7 (eG's).

C&GB card 94-64:.

02:38:29.0

17.9° B., 178.5° w.

Fiji Islands region

h about 563km '

Magnitude 5.0 (eGs).

, I

13~11:44

13:16:44

13:57:41.2 d

47.5 d

48.5 d

eP

eP

iP

z

z

z

PEN eG

FEZ eR

C&GS card 93-64:

'13:47:42.7

37.9° N., 138.3° E.

Near west coast of Honshu, Japan

h about 36 km

Magnitude 5. 5 (eGS ). .. \

November 27,

u

u

C&GS card 95-64:

.12:27:38.6

6.80N., 94.80E.

Nicobar Islands region

h about 33 km

Magnitude 6.5-6.75 (Pal}, 5.7

(CGS) .

November 30

November 25, 1964

M z ,iP 09:35:42.9 d

A Z iP 42.8 d

D Z eP 42.1' d

MP Z iP 43.·3 d

u Z eP 43~·1 d

NE Z eP 41~6 d

C&GS card 94-64:

09:24:08.9

4.30S., 122.2° E.

Celebes

h about 610 km

Magnitude 6.2 {CGS).

M

D

Na

22:27:58.4 d

12:52:48.3 c

48.3 c

48.9 c

48.7 c.

51.9 c

48,0 c

13:02:34

13=°7:21

13:15:41

M z eP

November 23

M Z iP

D Z iP

MP Z. iP

U Z eP

Pa Z eP

NB Z eP

U PEE eS

U PEZ eSS

U PEZ i.R

C&GS card 93.,.64:

12:40:51.4

13.1° N~J 124.70Eo

Luzon" Philippirle IsJ..and.s

h about 5 kIn

IvIagnitude 6. 1 (eGS )

6.9 (IfVO).

24
Table ·5.•.--Distant earthquakes--Continued

November 30 December 5-6

November 30

C&GS card 98-64:

18:53:11.4

24.0° S.} 179.9° E.

South of Fiji Islands

h about 550 km

Magnitude 5.5 (CGS).

04:38:08.0

00:18:42

z eP

·PEZ· eR

C&GS card 98-64:

04:27:16

2.3° B.) 138.3° E'~"

West New Guinea

h about 33 km

Magnitude 5.0 (CGs).

M

C&GS card 94-64:

·23: 55: 59.2

54.0° N.) 161.5° E.

Near east coast of Kamchatka

h about 39 km

Magnitude 5.0 ~CGS).

December 6

19:01:11.7 d ·u

11.6 d

11..3 d

14.5 d

22:47:37.2 d .

38.2 d .

38.2 d

3·7.7 d .

37.9 d .

38.2 d

37.6 d

35.1 d

eP

eP

eP

eP

z

z

z

z

M

WP

MP

Hi

M Z iP

A Z iF

D Z iP

NP Z iP

WP Z iP

MP Z iP

U Z iP

Hi Z eP

C&GS card 94-64:

22:40:46.0

53.7° N., 167.7° W.

Fox Islands, Aleutian Islands

h about 69 km

Magnitude 5.0 (eGs).

December 2

13:26:34.5 c

36.3 c

36.8 c :

37.0 c .

35.9 c

M Z eP

A Z eP

D Z eP

MP Z eP

U Z eP

C&GS card 93-64:

13:18:29.0

53.8° N., 165.4° w.

Fox Islands, Aleutian Islands

h about 35 km

Magnitude 5.0 (eGs).

25
Table 5. --Distant earthquakes'-~~_Continued

December 7, 1964

M z· iP 09:08:32.9 c

A Z eP 33.0 c

D Z eP 32.1 c

WP Z eP 33.1 c .

U Z eP 32.9 c .

Pa- z· eP 35.1 c

Na Z iP 30~4 c

Hi Z iP 35.4 c

Ka Z eP 32.1 c

Ke Z iP .29.5 c

NB Z eP 31~8 c

COOS card 98-64:

08:58:43.8

5.4° S~, 151.3° E.

New Britain region

h about 54 km .

Magnitude 5.5-5.75 tBrk)

6 (Pal)

5.8 (eGs).

December 8

December 10 .:. '.

M Z iP 15:21:06.5.d

A Z eP 07.2: d

D Z iP 06.8 d

WP Z eP °7.. 2·:·d

MP Z eP 07.9 d

U Z eP ." 07 ~:l" d

Pa Z eP 09.0 c

Na Z iP 07.3 d

Hi Z eP. 07~·· 4 d

Ke Z iP -' 04.0 d

NB Z eP .06~ 2 d

Ha Z iF 15:20:58.0 c

C&GS card 103-64:

15:11:05.5

40.4° N., 138.9° E.

Eastern Sea of Japan

h about 33 km:

Magnitude 6.75-7 (Brk), 6 (Pal)) . 6~ 0 (eGs).

Pa z Tmax 16:52:09

C&GS card 100-64:

16:11:25

45.0° N., 130.1° W.

Off coast of Oregon

h about 28 km

Magnitude 4,3 (eGs).

26
Table 5. --Distant e'arthquakes--Continued

December 11, 1964

M Z eP

A Z eP

D Z eP

Pa Z eP

Na Z iP

Hi Z iP

Ha Z eP

16:14:53.2 c

53.9' c

53.4 c

55.1 c

54.0 c

16:14:53.7 c

44.8 'c

December 15--Continued

C&GS card 99-64:

05:06:22.8

2.3 0N., 126.6° E.

Molucca Passage

h about 45 km.

December 15

C&GS card 99-64:

21:17:21.0

40.3° N., 125.10w.

Ofr coast of northern California

h about 33 km

Magnitude 3.5 {Brk).

C&GS card 101-64:

16:04:58.2

38.9° N., 130.0° E.

Sea of Japan

h about 550 km

Magnitude 5.6 (CGS)

December 12

04:07:07.8 c

07.9 c

07.9 c

07.8 c

'08.4 c

,07.9 c

12:23:25.8 d

26.8 d

25.5 d,

24.3 d

iP

iP

iP

iP

iP

eP

eP

eP

eP

eP'

z

z

z

z

C&GS card 101-64:

12:13:25.8

14.7° N., 91.7° w.

Guatemala

h about 118 km

Magnitude 5.4 (eGs).

A

D

MP

Hi

December 16

M

A

NP

'WP

MP

U

21:58:24

21:59:05

21:58:15

Tmax

Tmax

Tmax

z

z

z

Pa

NB

Ha

C&GS card 102-64:

00:33:24.7

64.9° N., 165.7° w.

Alaska

Felt: Nome

h about 15 km

Magnitude 6 (Pal)

5.4 (eGs).

December 13

December 15

05:27:57.4 d

57.6 d

59.1 d

iP

iP

eP

z

z

z

D

WP

P~

December 17

C&GS card 101-64:

03:57:17.2

21.6° S., 169.6° E.

Loyalty'Islands region.

h about 44 km

Magnitude 4.3 (eGs).

'C&GS card 101-64:

05:18:34.8

.45~4° N., 150.1° E. ~Kurile Islands

h about 17 km

MagnitUd.~ 5. 3 (COO).

'05:18:19.9 d

20.2 d

19.2 d

20.2 d

20.2 d

.18.7 d

27

eP

iP ,

eP

eP

'eP

eP

eP

z

z

z

z

z

z

z

M

A

D

MP

U

NB

M
Table 5.--Distant earthquakes--Continued

C&GS card 102-64:

08:01:12.6

18.4° N., 68.8° w.

Mona Passage

Felt widely on Puerto Rico

h about 115 km

Magnitude 6 (Pas)

5.6 (eGs).

16:i3:55~6 c

55.5 c

55.1 c

55. 7 0.

55.7 c

56~o c

55.9 c

52.5 c

57.2 c

56.8 c

52~8 c

55.4 c

54 .. 3 c

16:25:41

16:26:55

16:30:11

16:32:53

16:33:29

16~.36: 41

Z iF

Z iP

Z iP

Z iP

Z iP

Z iP

Z iP

Z iP

Z iP

Z iP

Z iF

Z eP

Z iP

PEZ epP

PEZ esP

PEE eS

PEE eScS

PEE isS

PEE iG

C&GS card 104-64:

16:16:11.0

22.1° S. J 179.6.0W,"

S011th of Fiji Islands

h about 611 km

Magnitude 6.25-6.5 (Pas)

6. 2 (eGs).",

D~cember 30

Pa Z Tmax 10:33:04

C&GS card 105-64:

09:26: ~·o

9.6° S., 109.1° w.

Northern Easter Island Cordillera

h a.b01.1t 33 km

Magnitude 4.5 (eGs) ..

December 39

Pa Z Tmax 11:04:16

C&GS card. 105-64:

09:58:01

8.70S., 109.3° w.

Northern Easter Island Cordillera.

h about 33 km

Magnitude 4.6 (CGS).

M

A

D

NP

WP

MP

U

Na

Hi

Ka

Ke

NB

Ha

U

U

U

U

U

U

December 26--Continued

C&G-S card--Continued, " ..-

Kamchatka

h about 136 'km· ..

Magnitude 5. 7 (CGS)~

December 28

8

08:13:17.4 d

16.7 d

17.3 d

16.8 d

.14. 9 c

15.5 d

18.5 d

18.7 d

18:55:17.9 c

17.8 c

14:39:05.5 c

06.7 c

05.8 c

07.1 c

06.1 c

07.2 c

07.7 c

05.4 c

00.5?c

02.4 c

14:38:54.3 c

eP

iP

iP

iP

iP

iP

iP

iP

eP

iP

December 17-18 J 1964

U PEZ eR 00:01:11

C&GS card 102~64:

23:44:46.2

51.4° N., 177.9° w.

Andreanof Islands, Aleutian Is1anqs

h about 57 km.

Magnitude 5..5 (CGS).

December 22

M Z

A Z

D Z

WP Z'

Pa Z

Hi Z

Ka Z

NB Z

December 24

M Z

D Z

C&GS card 105-64:

18:45:45.5

4.4° S., 153.10E.

New Ireland region

Felt: Rabaul and Londolouit

h about 93km

Magnitude 6.1 (eGs).

December 26

M Z " iF

D Z iP

NP Z iP

Z j.P

U Z iP

Pa Z iP

Na Z iP

Hi Z iP

Ka Z eP

Ke Z iP

Ha Z iP

C&GS card 104-64:

14:30:29.1

51.8° N*, 156.8° E.
\

Table 5.--Distant earthquakes--Continued

December 30, 1964

M z iP 15:37:06.9 d

D Z iP 07.1 d

NP Z iP 07.5 d

WP Z iP 07.5 d

MP Z iP 08.2 d

U Z iP 07.1 d

Pa Z iP 09.5 d

Na Z iP 06.6 c

Hi Z iP 07.5 c

Ka Z eP 02.5 d

Ke Z iP 03.4 d

NB Z iP 06.0 d

C&GS card 104-64:

15:27:25.8

31.30N., 138.80E.

South of Honshu, Japan

h about 261 km

Magnitude 5.4 (eGs).

December 30

M Z iP 21:38:56.0 d

D Z eP 54.8 d

WP Z iP 55.4 d

NP Z iP 55.3 d

MP Z iP 55.2 d

Pa Z iP 56.9 c

Ka Z iP 58.3?c

NB Z iP 54.9 d

C&GS card 105-64:

21:30:58.8

23.30S. J 179.90w.

South of Fiji Islands

h about 547 km

Magnitude 5.2 (eGs).

29
The following persons or agencies reported. ttfelt" earthquakes

during the ~'4th' qltfi·rter-,· '1964:: 'Their' assi'stance is gratefully acknowledged.

Mauna Loa summit ..areaMr. W. Francis

Mr. R. Decker

Mr. A. Yamamoto

Kilauea summit area

Mrs. C. Wentworth

Mr. A. Yamamoto

Mr. R. Decker

Mr. D. Peck

Mrs. B. Sunmer

Mr. and Mrs_ G. Yang

Mr. and Mrs. J. Hanson

Miss M. English

Mrs. M. Gorder

Mr. H. Mist

North Hawaii

Mr. R. Eklund

Mrs. P. Richards

Mr. A. Walker

Mr. ·Y. Kojima

Kana

Miss A~ Greenwell

Mr. R. Apple

Mr. M. SutherluIl.d

Miss N. Wallace

Mrs. C Qo Higaslrlhara

Kau

Mrs .. Hunter

I'.1rs. A.. Paiva

Mrs, P. Billings

Rev. D.. Thon1pson

Mrs. Carvalho

Mr. Wo Iviei.necke

Mr. E. Ross

Mrs. C. Ashton

. Hilo region

lv'rLss E. Patton

Mr. J. Bryan

'. Mrs. B. Shaf:fer

Hila Police Station

Civil DefenSe Offi~e

Mr. Ho Pierce

.Mr. J. Chang

Mr. Walker

Mr., H. Lewis

Mr. E. Crumb

Mr. S .. Ho

Mr. R. Baldwin

Puna

Mr. R. Edwards

Mr. H~ Warner

Mr. K. Kimura

Mr. C. Guerino.

Mr. E. Ross

Mr. R. Williamson

30
Publications of special interest and

RVO numbered contributions, 1964

Decker, R. W., 1963, Magnetic studies on Kilauea Iki lava lake, Hawaii:

Bull. Volcanol., Tome XXVI, p. 23-35. (HVO Contr. 187.)

Koyanagi, R. Y., 1964, Hawaiian seismic events during 1962, in Short

papers in geology and hydrology: U.S. Geol. Survey Pro~ Paper

475-D, p. Dl12-Dl17. (RVO Contr. 183.)

1964, Seismicity of the lower east rift zone of Kilauea Volcano,

------H-a-w-a-ii, January 1962-March 1963, in Geological Survey Research

1964: U.S. Geol. Survey Prof. Paper 501-C, p. CI03-CI05.

(HVO Contr. 188.)

Krivoy, H. L., and Eppley, R. A., 1964, T-phase of May 11, 1962,

recorded in Hawaii, in Geological Survey Research 1964: U.S. Geol.

Survey Prof. Paper 501-B, p. BI05-BI07. (HVO Contr. 185.)

Macdonald, G. A., and Eaton, J. P., 1964, Hawaiian ~.;·olcanoes during 1955,

u.S. Geol. Survey Bull. 1171, p. 1-170.

Moore, J. G., 1964, Giant submarine landslides on the Hawaiian ridge, in

Geological Survey Research 1964: u.s. Geol. Survey Prof. Paper

50l-D, p. D95-D98. (HVO Contr. 189.)

Moore, J. G., and Krivoy, H. L., 1964, The 1962 flank eruption of

Kilauea Volcano and structure of the east rift zone: Jour.

Geophys. Research, v. 69, no. 10, p. 2033-2045. (HVO Contr. 184.)

Peck, D. L., Moore, J. G., and Kojima, George, 1964, Temperatures in

the crust and melt of Alae lava lake, Hawaii, after the August

1963 eruption of Kilauea Volcano--A preliminary report, in

Geological Survey Research 1964: u.s. Geol. Survey Prof--.Paper

501-D, p. DI-DT.

Richter, D. H., Ault, W. U., Eaton, J. P., and Moore, J. G., 1964, The

1961 eruption of Kilauea Volcano, Hawaii: U.S. Geol. Survey Prof.

Paper 474-D, p. DI-D34. (HVO Contr. 186.)

31