Hawaiian Volcano Observatory

1965 Quarterly Administrative reports

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

Compiled By Jennifer S. Nakata

Summary 37

January, February, and March 1965

By Arnold T. Okamura, Robert Y. Koyanagi, and Howard A. Powers

Summary 38

April, May, and June 1965

By Howard A. Powers, Arnold T. Okamura,

Robert Y. Koyanagi, and Willie T. Kinoshita

Summary 39

July, August, and September 1965

By Robert Y. Koyanagi, Arnold T. Okamura, and Willie T. Kinoshita

Summary 40

October, November, and December 1965

By Robert Y. Koyanagi, Arnold T. Okamura, and Howard A. Powers

Open-File Report 2007-1325

U.S. Department of the Interior

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

DIRK KEMPTHORNE, Secretary

U.S. Geological Survey

Mark D. Myers, Director

U.S. Geological Survey, Reston, Virginia 2007

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INTRODUCTORY NOTE

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

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

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

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

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

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

published separately, due to differing schedules of data reduction. 

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

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

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

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

Chronology

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

Location Beginning Date Ending Date Comment

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

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

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

uninterrupted inflation following the 1960 eruption

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

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

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

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

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

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

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

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

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

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

 Thomas L. Wright and Jennifer S. Nakata 
UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOIDGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

SUMMARY 37

January, February, and March, 1965

By

Arnold T. Okamura, Robert Y. Koyanagi

and Howard A. Powers

OBSERVATORY STAFF

Geology

D. L. Peck

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

Geophysics

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

Yukie Kimura

B. J. Loucks

Akira Yamamoto
Contents

Page

Summary of activities----------------------------- - 1

Tilting of the ground around Kilauea caldera---.-----------------__ 7

Seismic summary------------------------------- --- 11

Persons or agencies reporting "felt" earthquakes during the

quarter------------------------------------- ---------- 42

Illustrations

Figure A. Sketch showing area of lava erupted March 5-15, 1965-- 2

1. Map of the island of Hawaii showing seismograph

stations and localities mentioned in the text------ 6

2a. Tilting of the ground around Kilauea caldera

between December 14, 1964, and January 21, 1965----- 9

2b. Tilting of the ground around Kilauea caldera between

January 21, 1965, and March 9, 1965----------------- 10

Tables

Table 1. Tilt coordinates at Uwekahuna Vault-------------------- 7

2a. Tilt coordinates and changes at bases around Kilauea

caldera---------------------------------------------- 8

2b. Tilt coordinates and changes at bases around Kilauea

caldera---------------------------------------------- 8

3. Number of earthquakes and minutes of tremor recorded

on seismographs around Kilauea caldera--------------,- 12

4. Local earthquakes recorded by seismographs of the

U.S. Geological Survey------------------------------- 16

5. Distant earthquakes------------------------------------ 23

6. U.s. Geological Survey seismograph stations in Hawaii-- 39

7. UGS. Geological Survey tiltmeter stations in Hawaii---- 41
Summary of activities

The big event of the quar~er was the 10-day flank eruption, starting

March 5, in the upper east rift zone of Kilauea. It was not unexpected)

because tilt and leveling data showed a high degree of inflation of the

Kilauea summit. However, no preceding events were recognized as indicating

the place or time of outbreak until tremor started 1 1/2 hours before the

appearance of lava 0 The extent of lava from this eruption is shown in

Fi.gure A.

The following events took place prior to eruption: In late December)

a swarm of short bursts of long-period tremor and an episode of strong tilt

in an almost due-north direction at Uwekahuna began, and continued through

the first 10 days of January. Analysis of samples of the tremor recorded

on the l2-channel seismic array indicates a source from 3 to 7 km beneath

Halemaumauo Mid-January readings of the long-base!tiltmeter net suggest that

the center for the surge of rapid inflation was under the caldera rim, south

of Halemaumauo

Slow inflation resumed about January 20, apparently over a center more

to the north and east, and continued until the eruption started.

Several hundred short bursts of long-period tremor were recorded

between January 24 and January 26, and flurries of several tens of events

per day occurred sporadically six times during February. About 25

shallow-focus (less than 3 km) earthquakes were recorded on February 7

whose sources were a few km southeast of Makaopuhi Crater. Other than these

seismic events, the number of daily quakes (less than 60) was low, and

only eight quakes were large enough to be felt during January and Febtuaryo

The eruption was preceded on March 5 by the onset of tremor at about

OSh02m, recorded first on the Makaopuhi seismograph. Then it was picked up

at all other stations of the Kilauea summit net with rapidly increasing

intensityo This tremor was recorded on the l2-sensor array as well as the

summit net. By 09hOOm, constant ground trembling and continuous rockfalls

were observed at Makaopuhi.

Outbreak of lava was first seen about 09h 50m in Makaopuhi. Visibility

was poor along the upper east rift because of rain and ground-level cloudSe

It is surmised that the first outbreaks produced an almost continuous li.ne

of fountains that cut across the north wall of Makaopuhi and the floor of Napau,

nearly coincident with the two small fissure vents of 1922 and extending about

4 miles eastward from Makaopuhi Cratero

The first "curtain of fire" stage of activity erupted at least 30,0100,000

eu yds during its 10-hour duration. About 2,200,000 cu.yds of this lava.had

formed a lake 165 feet deep in the west pit of Makaopuhl when the fountalns

there ceased at 18h20mo Napau was filled to a depth of about 40 feet, and

overflowed through a graben intersecting the southeast wallj when fountaining

ceased, the lake level subsided about 20 feet, which is equivalent to about

6,000,000 cu yds of flow back down the vent.

1
C> 

Kala

Cra

3 M

I

2

I

190 22' 30"

I

I

Scale (approximate)

1550 ], 30"

o

I

Makaopuhi

Crater

Kane Nui 0 Hamo

'EXPLANATION

Lava flows of March 5-15, 1965 eruption

Cinder cones, and pit craters

••

00

Aa

Q

__

..

-----

"'

\

\

,

\

I

,

\

I

I

/

/

/

,/

/'

"

Figure A. Sketch map showing area of lava erupted March 5-15, 1965 (Makaopuhi

eruption) from the east rift zone of Kilauea Volcano (Hawaii). Flow area mapped

by J. G. Moore and D. L. Peck.
Pumice samples were collected from Makaopuhi and five other locations

down the initial ttcurtain of fire,tt I, 1.7, 1.9, and 3.4 miles east of

Makaopuhi. Optical pyrometer measurements of Makaopuhi fountains gave

1,035°-1,070°C, but all readings were screened by fume or falling pumice

and thus are undoubtedly too low.

The short-base tiltmeter monitored a summit collapse of about 70

microradians on a bearing about S. 60° E. during 10 hours, from 08h30m

to 18h30m, and further collapse of about 25 microradians on a bearing

of about S. 35° E. during the next 38 hours, until o9hoom on March 7.

No further tilting was indicated. This structural deformation is further

described by a shortening of the distance across Kilauea caldera (from

Uwekahuna to Keanakakoi) by 25-30 cm and a measured loss of altitude of

nearly a foot (relative to a benchmark on the nearest slope of Mauna Loa)

at the center of collapse, which was defined by the azimuth intercepts of

the long-base tilt net to be near the caldera wall south of Halemaumau0

A second phase of activity can be characterized by erratic waxing

and waning at three localities scattered along nearly 8 miles of rift

zone. This phase may be considered as having started before the tt curtain

of fire" phase died out. About 15h25m op March 5, new fountains broke

out 6 1/2 miles east of Makaopuhi (2 1/2 miles beyond the eastern limit

of the curtain of fire), and continued through the night as the only

acttve fountains. Two more fountain groups started in the early morning,

the easternmost nearly 8 miles from Makaopuhi and nearly due north of

Kalalua Crater. By 09h30m they had coalesced into one group, and

fountaining resumed in Makaopuhi 1 1/2 hours later. Activity alternated

somewhat between the two rift areas outside Makaopuhi until about lQh40m

March 7, when all activity ceased except in Makaopuhi, where sluggish

eruption continued. A new vent that opened about 3 miles east of

Makaopuhi during mid-morning of March 9 poured out a small flow, built

a spatter rampart, and ceased activity completely about 07h30m March 10.

This may be considered as the end of the second phase.

About 2,000,000 cu yds was erupted during these 4 1/2 days of erratic

fountaining, half in Makaopuhi and half in flows to the east. Five samples

of the eastern flows, representing this second phase, were collected

after the eruption was over from sites 2.4 miles east of Makaopuhi and

from 7.3 to 7.6 miles east of Makaopuhi. Four second-phase samples were

dipped from Pahoehoe toes reaching the Makaopuhi lake margin. Temperatures

in these lake-margin flows were found to be l,090°C by both thermocouple

and optical pyrometer measurement.

The third phase, consisting of activity in Makaopuhi, was characterized

by an accelerated output and'increased lava temperature. This phase

actually started in Makaopuhi during the early hours of March 10, before

the cessation of the last fountains farther down the rift. Features most

noticeable included a distinctive sheen on the crust of the new more

l"apidly spreading flows and widespread advance of the "shore line" of the

lava lake. Accelerated output continued until the sudden end of the

eruption at 22h 5lm on March 15. During the last 6 hours the enormous

extrusion rate averaged over 160,000 cu yds per hour. The lake reached

a maximum depth of 330 feet and had a 'volume of 9,00Q,OOO cu yds.

3
· On March 12, good measurements of a temperature of 1,160°c by

optical pyrometer were made at the lake's edge. The fluidity and color

of the lava indicated characteristic high temperaturesJ. though good

pyrometer readings from the crater rim were not possible. Several

samples of pumice, collected on canvas at intervals of as much as 24 hours

beginning the morning of March 12, plus three samples dipped from the

lake margin on the 12th and 14th, represent the lava of the third

phase.

The fourth and last phase of activity comprised drain-back and

episodic overturn of crust at Makaopuhi lava lake. These phenomena

continued for 3 3/4 days after the fountaining and eruption had stopped.

The altitude of the lake surface was lowered 60 feet below the high-lava

shoreline during the drain-back. During this lowering, crust foundered

and new crust formed over the entire lake surface 18 times.

Two days after the last overturn of the crust, surveying was started

to establish benchmarks at laO-foot intervals along the two principal

diameters of the lake. Two days of heavy rains, and immediate formation

of thick clouds of steam rising from the thin still-hot crust,

interrupted the work. But on March 19 the survey was completed, leveled,

and tied to a large talus block near the level of the new lava shoreline.

(Releveling 15 days later revealed an average crustal subsidence of

3.4 feet.') Measurements of gravity, magnetic field, temperatures on

surface and in cracks, and 'detailed mapping of cracks, local relief,

lines and spots of sublimate deposits, and other features of the lake

crust were intitiated immediately and tied to the benchmarks. Plans

were initiated to pursue a program of core drilling in the crust to

help document the cooling history of the lake.

Alae Crater studies. --Work was continued on the study of the small

lava lake in Alae Crater,. which became solidified in September 1964. On

January 21, temperatures were measured in 6 drill holes in the crust, and

the elevations of 29 stations on the lake surface were determined by

precise leveling. Temperatures of the lake showed a drastic decrease

from those of December 8, 1964, probably influenced by the excessive

rainfall during the periodj the maximum temperature measured was 865°C,

at a depth of 32 feet in drill hole No.9, where the lake is 48 feet

thick. The leveling showed an average subsidence of .017 foot since

November 3.

Two groups of astronauts visited the observatory on consecutive weeks,

each in Januar~ for 5,days of field study. A great array of textural,

structural, and mineralogical features were noted, but concentration was

on a few important features that are most conspicuous and can be most

readily studied in Hawaii. These include: the differences between the

surface formed on a deep body of relatively stagnant lava (a confined

lava lake, or a thick flood on a level plain) and the surface formed on

thin gushes of rather mobile lava (layered overflows from Halemaumau on

the floor of Kilauea caldera)j features that characterize rift eruption.

and differences between lapilli and lapilli cones formed from fluid '

basalt versus those formed from rather viscous feldspar-rich andesite.

4
Japan-United States cooperative study of Kilauea.-~ProfessorT.

Minakami, Doctor D. Shimozuru, J. P.. Eaton, and J. G. Moore returned

to H.V.O. to join with Arnold Okamura, Robert Koyanagi, W. T. Kinoshita,

and Dallas Peck in conferences on progress made in analysing the results

of the Japan-United States cooperative study of Kilauea, July-December

1963. Progress and promise of results were very gratifying and

encouraged Professor Minakami to set the date and itinerary for a third

general conference, to be held in Japan in October-November 1965.

Xenolith Studies.--E. p. Jackson started mapping and meticulous field

study of the 1801 lava flow of Hualalai, the host to large quantities of

xenoliths of coarse-grained rocks showing a great range of mineral

composition. Several thousand zenoliths were described in the field study,

and several hundred were collected for detailed laboratory study.

5
WOi~

Honokaa

RoOO 0

Paauilo a

EXPLANATION

• Seismograph Station

o Town or locality

5EHLEHLEH3:0====::E=:3'0f.===:::JIF Mile.

5 ° 5 10 15 20 25 Kilometer, S A A E+=3 e---3 I

Contour int.rval 1,000 fMt

Datum i, meon ,eo level

TopOQrophy by US GeoloQical Sur".,

-Laupaho. o. - 20°

Figure 1. --Map of the island of Hawaii shoWing localities mentioned

in the text and seismograph stations operated by the

U.S. Geological Survey. Epicenters of local earthquakes are

given in terms of geographic coordinates, which are indicated

at the edges of the map.

6
Tilting of the ground around Kilauea, calderao--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 1y means of a network of field tilt bases and

a portable water-tube tiltmeterc The attitude of the ground surface at

each tilt base is reported in terms of north-south and east~west t~lt

coordinates 0 Both coordinates at each station were arbitrarily set equal

to 500 when measurements at that station were begun 0 Increasing tilt

coordinates correspond to northward and eastward tilting of ,the earth's

surfacej that is, to a relative subsidence toward the north 'and east.,

A one-unit change in coordinate corresponds 'to a tilting of 1 microradian

(1 mm per km) in the direction indicatedo

Location of and essential data on each tiltmeter station are listed

in table 7, which is published only in the first-quarter issue each year.

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

February, and March, 1965 r

Date Date

(1965) N-S E-W (1965) N-S ,E-W

Jan., 3 494 466 Feb. 21 513 454

10 503 463 28 ' 514 452

17' 506 463 Maro 7 478 499

24 509 461 14 460 518

31 511 458 21 458 519

Febo I 513 455 28 459 514

14 513 454'

7
ls.t Quarter, 1965

Table 2a.--Tilt coordinates and changes at bases around Kilauea caldera

(See tilt diagrams, figs. 2a, b.)

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

(1965) N-S E-W and direction of Date of

tilting since last readin

last reading (1964)

Uwekahuna Jan .. 17 507.6 453.3 15.2 N. 6. $0 W. Dec. 10

Tree Molds 17 459.1 512.8 5.7 N. 0.9° E. 7

Sand Spit 19 922.0 752.6 34.9 N. 50.7° E~ 11

Kalihipaa 21 318.2 385.3 3.1 S. 61.6° E. 8

Keamoku 18 527.0 539.1 32.1 N•. 49.5° W. 11

Ahua Kamokukolau 18 509.3 554.4 44.8 S. 45.4° E. 10

Kipuka Nene 21 479.2 506,,2 1.0 s. 27.3° W. 14

Hilina Fali _..... _-- ----- ----- not occupied this time------

Kapapala Ranch 19 493.-6 506.4 0.41 s. 85.6° E.\ 9

Mehana 17 549.7 554.3 2.2 N. 32.4° E. 10 ,

g

Table 2b.--Tilt coordinates and changes at bases around Kilauea caldera

(See tilt diagrams, figs. 2a, b,)

ing Date Tilt coordinates Rate (10-6 rad/mo) Date of

Tilt Base (1965) N-S E-W and direction of last read

tilting since ~{1965)

last reading

Uwekahuna Mar. 6 441.0 504.0 52.3 S. 37.3° E. Jan. 17

Tree Molds 7 424.8 525.9 36.7- s. 20.9° E. 17

Sand Spit 8 882.3 735.4, 43.3 s. 23.4° E. 19

Kalihipaa 7 333.6 385.3, 16.9 N. 00.1° W. 21

Keamoku 7 585.1 510.1 40.6 s. 63.5° E. 18

Ahua Kamokukolau 6 609.9 542.9 101.2 N. 6.5° w. 18

Kipuka Nene 9 484.0 506.2 2.9 N. 00.4° W. 21

Hilina Pali ------ ----- ----- not 0lcuPied this time ----- ... - Kapapala Ranch 8 493.7 506.8 .6 N. 21.8° E. I 19

Mehana 9 540.7 545.2 7.5 S. 45.3° W. 17

8
v

o

N

t

5 K M

IKN

Kom~

~ol

• H P

TILTING RATE 5.0 X 106 RADIANS / MONTH

DEC 14, 1964 - JAN 21. 1965

I

Q

Kop

.......

2000

Figure 2a. --Tilting of the ground around Kilauea caldera, Dec. 14,

1964-Jan. 21, 1965. 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 basesj open circles, short-base water-tube tiltmeters.

9
/M

cr

o

5 K M

Q

Kop

•

./

-/ • HP

./ /-".- -6

m,TILTING RATE 10.0 X 10 RADIANS / MONTH

2000 ;// JAN 21, 1965 - MAR 9, 1965

00 I

Figure 2b.--Tilting of the ground around Kilauea caldera, Jan. 21,

1965-Mar. 9, 1965. 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.

10
Seismic summary. --Events recorded by the U.S. Geological Survey

seismograph network in Hawaii fall into two categories: local earthquakes

land tremor originating i.n the region of the Hawaiian Islands (usually

within 100 km of at least one seismograp~), and distant earthquakes

'originating,more than 3,000 km from Haw~iio 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.J. 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 ipdividually in table 4. Data on

identifiable phases of distant earthquakes are listed in table 5.

Location of and essential data on. ~ach. seismograph station are

listed in table 6, which is published,only in the first-quarter

issue each year.

. i"

11
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs U, M

W?, and MP around Kilauea caldera

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

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

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

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

Kilauea summit region, and shallow earthquakes in the Kilauea caldera region; shallow.e

along the SW. rift zone of Kilauea and the adjacent portion of the Kaoiki fault system; 

along the eastern half of Kilauea's east rift zone--detected largely on the Papoa seism

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

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

Tremor Earthquakes

Date (in minutes) KiJ-auea Summit SW. rift Eastern Upper

(1965) and east east 

Deep Inter- Shallow 30 KM Shallow Kaoiki I'ift rift

mediate

Jan. 1 ---- ------- ----- ---- 134 6 8 2 Mauna K

2 ---- ------ ----- 1 99 12 ----- 6 ---------

3 ---- ------ 15 2+ 110 4+ ---- 13 1 Kona

4 ---- ------ 27+ 2 135+ 9 ---- 10 ---------

5 ---- ------ ----- .---- 61 5 1 3 1 Mauna K

6 ---- ------ ----- 3 63 6 1 5 ---------

7 _...-- ------ 1 58 7 1 3

8 ---- 12+ ----- 3 65+ 10 ---- 3 1 Kona

9 7 ----_.- ----- 3 89 9 ---- 3 1 off 

10 26 ------ ----- ---- 135 4 ---- 3 1 Mauna K

11 44 ------ 8 4 110 7 ---- 4

12 4 ------ ----- 4 115+ 7 ---- II 1 Kona

13 ---- ------ ----- 4 40 3 ---- 7 1 Kohala

14 30 ------ ----- 6 60 4 ---- 12 ---------

15 30 ------ - ... --- 1 45 7 ---- 6 ---------

16 ---- '19 ----- 4 25 3 ---- 7 1 Mauna L

17 20± 4 55 4 ---- 6 ---------
18 30±

3 81

6 1 6

19 20±

2 60

2 1 i8 ---------

20 15± 1 69

7

6 ---------

21

6 80 1 13

22

2 65

5 12

23 57

5

4 ---------

24

3 40

5 1 1 Mauna K

25

5 20

3

26 ------

4 150+

4

27 13 68

3

4 ?

28 95

4 1 10

2 Kana

29

3 20

4

4 ---------

30 1 47

6 1 ---------

31 18+

2 35

3

2 4 1 Kana

Feb. 1 ------

3 30

6 1 5 ---------

2 1 54

2 1 4 ---------

3

2 50

3

3 1 Mauna L

I-J

4 39 60

2 ? ---------

w

5 1 45+

9

4

6 38

3

7

7 2 75 2 2

8 150

2 1 1 Mauna. K

9

3 88

3

2

4 1 Kana

10 42 1 3

8

11

2 41

2 10 ---------

12

3

3 47

2

5 1 Kana

13

2 54

4 1 32 1 off sou

of Haw

1 Kana

14 1 59

3 1 25 ---------

15 36

4 15 ---------

16 - -;·,2 35

4 13 1 Mauna. L

17 28

3

2 ---------

18

2

4 45+

7 11 1 Mauna K

19

2 35

4

4

20

3 i 51

5

2

21 33 1 4

3

22 30 1 47

5 1 5
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs U, M

WP, and MP around Kilauea caldera--Continued

Tremor Earthquakes

(in minutes) Xilauea Summit SW. rift Eastern Upper

Date Deep Inter- Shallow 30 KM Shallow and east east 

(19

65) mediate Kaoiki rift rift

Feb. 23 ------ -------

2 45

5 1 3

24 -------- -------

2 40

3

4

25 ------ ------- 33

5 1 3

26 35 ------- -------

2 45

5

3

27 ------ ------- 1 94

5

3

28 ------ -----._-

2 68

6 1 2 Kohala

Mar. 1 ------ -------.,

5 43

4 2 3

2

7 1 30

4 1 3

3 28 -------

5

3 51

7

2

2 ---------

4 ------ ------- 1 76+

4

2 19

5 ------ Harmonic

-I="" Tremor.

6 ------ ---do-- 25+

4

7 ------ ---do-- 1 57

7 ---------

8 ------ ---do-- 3 66

9

2 off sou

Hawaii.

9 __ c.. ___ ---do--- 31 20 61

4 1 off sou

Hawaii.

10 ------ ---do--

2 28+ 2+

11 2 ---do--

3 22

6 10

12

3 -=------ ---do-- 2 22+

5

2

13 ------- ---do-- 17

3 ---------

14 __ .. ---do-- 37

7

5

2 Kona

15 ------ --'----- 15

4

16

6 ------- 1 24 8 10

17 ------ caa... _____

1 20+ 10

4

18 ....---- 1 30

7

5 1 Mauna K

19 "'_&.m __ ------- 1 15

6

6 1 Kona

20 ------- --------

3 25 18
are 21 ---- ---- I 3 45 21 ----- 15 1 Maun

22 _1IEa-.:2_ ----- ---- I 120

9 ----- ? 1 off 

Haw

23 ___ e:-_ ---- ----

4 20 13 -.. 5

24 ---- - ..-- __ -=-_

6 17

5 --- -.... - 5 1 Maun

25 14 ----- ---- I 23 3 -----

5

26 20 ---- ----- 13 65

9 -------

5 1 Kana

27 ---- ---- - -----

2 75 11 --=------ 11 1 Kana

28 c=- ___ caIt __

2 60

9 -----

5 1 Maun

29 _ __

5 35

5 ___ ,,_Ra3

30 -='---- ----=- __ c::=-_ ? 25 ? ---=::.----= ?

31 ---- __ IIa!_ ? 20 ? __ c.

?

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

January, February, and March, 1965

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

epicenter, and felt report. All earthquakes of magnitude 2.5 and larger (as well as 

fayorably loca.ted smaller ones) are inc1udecl in the list.

Date Time Magni- Depth Epicenter 

(1965) ..ll_ m . tude (km) Lat. N. Long. w• Description 

Jan. 1 04 57 45.4 3.9 13 19°48.5' 155°25.4' 14 km NE. of Pohaku1oa Isla

1 13 05 00.5 3.4 10 19°47.1' 155°23.1' 15 km ENE. of Pohakuloa

3 16 05 47.0 2.7 3 19°40.0' 155° 52. 9' 17 km NNE. of Kealakekua

3 23 41 31.9 2.5 10 19°18.8' 155°13.7' 8 km SSE. of Ahua ---

seismometer.

5 16 45 11.6 2.6 5 19°53.0' 155°48.0' 20 km SW. of Kamuela ---

6 07 18 58.7 2.1 8 19°16.2' 155°10.7' 10 km S. of Makaopuhi ---

seismometer.

8 14 51 07.9 3.1 27.5 19°23.5' 155°15.0' Beneath Kilauea summit Kil

- r

8 17 51 44.2 2·9 5 155°25.9 1 Kaoiki fault system ---

8 20 33 19.4 2.9 8 19°24.2' 155°52.8' 4 km NE. of Hookena ---

9 05 58 46.6 3.1 13 20°50' 155° 25' 83 km ENE. of Hakeakala ---

seismometer.

9 22 29 12.8 2.0 10 19°18.2' 155°13.7' 9 km SSE. of Ahua ---

seismometer.

10 01 25 19.0 202 8 19°46.6 1 155°18.8' 25 km WNW. of Hilo 

10 07 15 03.4 2.4 10 19°18.6' 155°07.4' 9 km SEe of Makaopuhi ---

seismometer.

12 15 23 24.7 3.0 5 "9° 37. 7' 155°49.4' 16 km NE. of Kealakekua --

12 18 37 19·7 2.1 30 19°23.1' 155°17.5' Beneath Kilauea summit ___

12 23 08 15.4 2.1 30 19°22.8' 155°19.8' .. __13 15 44 47.1 2.0 27.5 19°24.4' 155°16c2' __ cm 

13 20 25 20.2 3.6 20 20°05.7' 155°50.5' 16 km NW. of Kamuela ,Ka

K

14 03 49 35.1 2.7 45 19°34.4 1 155°04.5' 5 km ENE. of Mt. View _... 

15 00 15 31.0 204 22.5 19°22.9" 155°l8oo' Beneath Kilauea surnmit __16 01 56 1401 2Q8 8 19i) 11.8' 155° 41c 5' 19 km NW. of Naalehu __

18 00 25 52.0 202 10 19°20.9 1 155°06.3' 9 km ESE. of Maka,opuhi ... _

seismometer"
Jan. 18 13 44 29.3 2.2

5 19°23.5' 155°24.6' Kao.iki fault system

21 17 29 25.8 3.1 30 19°22.5' 155°18.2' Beneath Kilauea summit 

22 17 38 34.6 2.4 25 19°24.5' 155°16.0 1 Beneath Kilauea summit 

24 10 . 42 37.8 2.3 30 19°23.0' 155°17.4' Beneath Kilauea summit24 22 08 13.2 3.9 13 19°45.9' 155°34.2'

5 km NW. of Pohaku1oa 

27 02 23 10.6 2.6

8 19°19.6' 155° 13.

7 km SW. of Makaopuhi 

seismometer.

27 06 14 35.1 200 25 19°20.. 8' 155° 18. 5' Beneath Kilauea summit27 12 58 17.4 2.2 22.5 19°21.9' 155°l8.3' ---do----------------- . 28 09 42 05.8 3.0 10 19°30_8' 155°04.7' 12 kIn of Kealakekua 28 20 57 19.8 2.3 13 19°41ot5' 156°08.. 2' 10 km SW. of Keahole 

Point.

29 13 38 32.5 2.1 10 19° 16.9' 155°07.8 1 10 km SEe pf Maka.opuhi

seismometer.

29 18 30 35.6 ·2·9

8 155°27.0' Kaoiki fault system

04 19 34.2' 2.9 3 19°30.. 7' J-55° 55.8'

2 km.WSW. of Kealakekua 

\--' Feb. 3 16 37 28.6 ,2.4 13 9° 24. l' 155°35.3' 10 km SSW. of N.orth Bay 

-.1 seismometer.

5 05 36 50.7 2.0 <3 19°24.5' 155°10.1'

6 km NNE. of Makaopuhi .

seismometer.

6 06 ' 10 2.'4

8 19°17.. 4 ' '155° 12. 3 1 10 km SSWetof'Makaopuhi 

7 11 45 25.5

2 .. 2 3 19°21.0 ' 155°02.2' selsmome ere

7 km W. of Kalapana 

7 ),,7 22 28.7 2.1 3 19°23.0' 155°08.3'

5 km ENE. of Makaopuhi ' 

seismometer..

7 21 28 i9.8 2.6 3 155°08e0 1 5 km ENE. of Makaopuhi 

seismometer.

7 22 51 56.7 2.5

5 19°20.2 1 155°07.1 ' 7 km ESE.. of Makaopuhi. 

seismometer.

8 09 40 31.0 3.7 13 19-° 53. 0' 155°35.4'

8 km ENE. of Waikii 

'8 15 48 10.2 2.7 <3 19°16.8' 155°08.8' 10 km SSE. of Makaopuhi 

seismometer.

8 15 52 57.1 2.4 <3 19°19.7' 155°06.7 1 8 km ESE. of Makaopuhi'

seismometer.

S 17 55 25·5 2.1 <3 19°19.5 ' 155°05.2' 11 km ESE.. of Makaopuhi 

seismometer.

9 03 43 00.2 3.0

5 19°21.3' 15

4°59.0' 1 km NW. of Kalapana

9 10 53 21.1 3.3

8 19°29.5' 155°51.1'

8 km ESE.. of Kealakekua 

10 20 05 11.3 2.3 20 19°38.4' 154° 59.. 6 t 14 km SEe of Hil0 

10 21 22 05.2 2.4

8 19°17.1' 155°13.4' 10 km SW. of Makaopuhi 

seismometer.
Table 4.--Local recorded by seismographs of the U5S0 Geological Surv

January,February, and March, 1965--Continued

Date Time Magni- Depth Epicenter 

(1965) h m s tude {km) Lat. N. Long. w. Description 

- - -

-

Feb. 11 17 36 12.4 2.1 10 19°20.7' 155°05.3' 11 of Makaopuhi 

seismometer.

11 18 11 03.3 3.0 3 19°21.8' 155°08.5' 5 km E. of Makaopuhi 

seismometer.

12 22 01 19.2 2.8 13 180 58 ' 156°15' 45 km SW. of Milo1ii 

13 01 19 03.7 2.2 8 19°40.8' 155°50.2' 20 km NNE. of 

Kealakekua.

13 13 06 29.0 4.5 13 18° 45' 155°16' 48 km SEe of Naalehu 

14 01 28 21.0 3.0 8 19°14.8' 155°14.0' 5 kIn wsw. of Apua 

Point. 

14 19 58 1852 2.2 8 19°26.2' 155°24.8' Kaoiki fault system 14 22 14 03.0 2.3 3 19°20.8' 155°05.8' 10 km ESE. of Makaopuhi 

seismometer.

14 23 50 42.7_ 3.3 5 19°20.3' 155°05.4' 11 km ESE. of Makaopuhi 

seismometer.

16 02 31 04.6 3.2 20 154°44.0' 33 km SEe of Pahoa 

16 05 49 59.2 2.4 <3 19°24.4' 155°10.5' 5 km N. of Makaopuhi 

seismometer.

16 17 48 23.8 2.4 10 19°18.1' 155°07.7' 10 km SEe of Makaopuhi 

seismometer.

16 22 28 42.4 2.7 8 19°08.8' 155°34.0' 9 km NNE. of Naalehu 

18 06 36 45.0 2.8 8 19°50.8' 155°24.9' 17 km NEo of Pohakuloa 18 09 18 28.8 3.5 5 19°21.0' 155°05.5' 10 km ESE. of Makaopuhi 

seismometer.

18 20 39 08.1 2.6 8 19°16.1' 155°12.5' 2 km WNW. of Apua Point 

19 07 00 42.6 2.9 8 19°16.0' 155°07.1' 13 km SEe of Makaopuhi 

seismometer.

22 07 43 02.7 2.2 10 19° 15.6' 155°13.4' 4 km W. of Apua Point 23 04 28 12.4 2.0 10 19°36.0' 155°06.4' 13 km SSW. of Hila 

23 11 24 40.5 2.2 6 19°24.2' 155°24.2' Kaoiki fault system 

25 18 18 41.4 2.4 10 19°18.7' 155°08.7' 7 km SEe of Makaapuhi 

seismometer.

26 22 06 50·9 2.5 10 19°17.7' 155°06.2' 11 km SEe of Makaopuhi 

seismometer.

28 03 27 52.4 2.8 8 155°26.0' 8 km SW. of Mauna Loa 

seismometer.
Maka.opuhi crater

7 km SEA of Makaopuh

seismometer.

10 km of Makaopu

seismometer.

4 km E. of Ahua

.seismometer.

2 km S. of Uwekahuna

seismometer.

1 km S. of Uwekahuna

seismometer.

13 km SEA of Makaopu

seismometer.

2 km S. of Uwekahuna

seismometer.

---do---------------

14 km SEA of Makaopu

seismometer.

12 km SEA of Makaopu

seismometer.

14 km SEA of

seismometer.

5 km E. of Uwekahuna

seismometer.

11 km ESE. of Makaop

seismometer.

8 km SEA of Makaopuh

seismometer.

4 km S. of Ahua

seismometer.

1 km B.. of Ahua

seismometer.

7 km BE. of Ahua

seismometer.

155°15.8'

155°15.8'

155°14.0'

155°17.7'

155°17.6!

155°05.. 4'

155°05·2!

155°04.1'155°14.6'

155° 05·0'

15'5° 6'

155°07.6'

155°06.6 t

19°20.3 1

19°24.2'

19°15.9'

19°18.. 3 t

19°17.5'19°25.4 1

19°19.8'

19°18.5'

19°21.8'

19°20.4'

3

3

3

8

6

5

5

5

6

3

3

1110

5

5

10

10

13

8

13

10

10.3 2.3

11.5 2'.7

08.2 2.6

28.6

23 .. 2 2.7

12.3

17.7 2.4

05.7 2.7

47.8 3.1

02,.7

16.7 2.7

12.8 2.9

46.0 2.6

37.6 2.7

24.7 2.5

56

55

39

11

39

37

14

12

55

55

55

55

28

27

15

21

55

03

50

00

22

21

1717

15

16

16

11

13

15

11

11

10

09

09

03

13

18

19°59.1' 1155049.81 15 km wsw. of Kamuel

20°05.4' 155°50.5' 17 km WNW. of Kamuel

19°18.7' 155°14.6!

8 km SSE. of Ahua

seismometer.

Shallow harmonic tremor and earthquakes start at 08-01. Although many 

were recorded during the eruption, only those.with greater than 2.0 m

listed.

08 42

09 16

5

5

5

5

5

5

5

5

55

5

5

5

5

5

5

5

5

6

Feb. 28

28

Mar.

4
f\)

o

Table 4. --Local eartliquakes recorded by seismographs of the U. S. Geological Sur

Januar:y, February, and March, 1965--Continued

Date rrime Magni- DeptrL EpicentE:r 

h- m s tude (km) Lat. .1\1 • Long. w. Description 

-- - -

6 01 12 12.0 4.0 5 19°15.0' 155°13.3' 3 km wsw. of Apua Point 

6 02 02 05.7 2.. 7 10 19°17.1' 155° 03.0' 16 km SEe of Makaopuhi 

seismometer.

6 09 15.9 2.8 3 19°12.4' 155°10.4' 7 kIn SSE. of Apua Poin6 10 47 52.1 2.7 10 19°15.0' 155°09.1' 4 km ESE. of Apua Poin6 13 06 06.4 2.3 10 19°18.3' 155°11.0' T km ssw. of Makaopuhi 

seismometer.

6 15 44 07.6 2.0 3 19°19.7' 155°16.1' 5 km S. of Ahua 

seismometer.

6 17 02 47.0 2eO <3 19°22.. 0' 155°11.0' 1 km NW. of Makaopuhi 

seismometer.

6 18 11 20.1 2.1 5 19°20.1' 155°16.6' 5 km ssw. of Ahua 

seismometer.

6 20 56 11.1 2.3 10 19°16.4' 155°10.5' 10 km S. of Makaopuhi 

seismometer.

6 01 37 37.1 2.7 3 19°19.7' 155°16.6 i 6 km ssw. of Ahua 

seismometer.

7 03 31 59.5 3.3 8 19°17.7' 155°13.6' 10 km SW. of Makaopuhi 

seismometer.

7 06 19 47.1 2.2 5 19°10.3' 155° 08.3 1 11 km SEe of Apua Poin7 06 22 26.1 2.5 5 19°09.1' 155°03.4' 18 km SEe of Apua Poin

7 06 43 36.2 2.3 8 19°16.4' 155°14.4' 5 km WNW. of Apua Poin7 07 43 15.3 2.4 9 19°15.9' 155° 14. 0'- 4 km WNW. 6f----Apua Poin7 08 45 16.0 2.4 8 19°11.5' 155°08e8' 9 km SEe of Apua Point 

7 09 53 12.8 2.6 3 19°23.2' 155°04.7' 11 km ENE. of Makaopuh

seismometer.

7 13 59 28.7 2.1 10 19°16.8' 155°09.0' 10 km SSE. of Makaopuh

seismometer.

7 16 07 28.5 2.0 8 19°19.0' 155° 10.5' 5 km S. of Makaopuhi 

seismometer.

8 00 06 36.7 2.3 8 19°18.5' 155°14.2' 8 km SSE. of Ahua 

seismometer"

8 01 22 45.5 2.5 13 19°12.9' 155°07.6' 9 km ESE. of Apua Poin
Mar.

8 01 31 10.3 2.0 10 19°19.8' 155°15.1'

5 km SSE. of Ahua 

seismometer.

8 04 11 22.4 2.3

5 19°09.8' 155°09.6' 11 km SSE. of Apua 

Point.

8 13 31 49.0 ·2.6

8 19° 13. 0' 155°26.5'

4 km NE. of Pahala 

8 13 59 14.2 2.5 30 18°49.3' 155°26.2' 31 km SSE. of Naalehu 

8 14 17 33.6 2.0

8 18°52.0' 155°22" 5' 32 km SEe of Naalehu 

8 14 44 18.5 2.0 10 19°11.9' 155°05.7' 12 km SEe of Apua 

Point.

8 19 03 56.0 2.8 <3 19°19.5' 155°06.2' 10 km ESE. of Makaopu

seismometer.

9 10 30 01.7 2.3 25 19°01.5' 155°32.4'

7 km SEe of Naalehu 

9 14 41 23.3 2.1

5 19°07e6' 155° 11. 5' 15 km S. of Apua Poin

9 22 14 47.4 2.3 22.5 19°21.2' 155°18.0' Beneath Kilauea summi

10 01 53 52.3 2.5 45 19°46.1 i 155°09.4'

9 km NW. of Hila

10 10 41 23.3 2.0

8 19°37.3' 155°07.8'

8 km NNW. of Mt. View 

12 19 35 06.8 2.2

8 19°11.7' 155°30.3'

4 km W. of Pahala 

I\) 14 00 06 25.2 2QO

8 19°15.3' 1550 51. 3' 10 kIn NNE. of Milo1ii

14 03 58 53.6 2.0 <3 19°21.1' 155°45.4' 16 km ESE. of Hookena 

14 08 24 27.0 2.1 3 \119°29.9' 155°49.1' 11 km ESE. of Kealakek

14 13 58 15.0 2.2

8 19°12.0' 155°01.0' 17 km ssw. of K<iiapaha 

15 05 37 44.0 2.8

8 19°10.0 t 155°28.6'

4 km S. of Pahala 

16 17 15 03.4 2.6

8 19°18.1' 155° 03. 3' 16 km ESE. of Makaopu

seismometer.

17 22 39 52.6 3.1 13 19°02.2' 155°08.5' 25 km SSE. of Apua

Point.

18 20 40 55.6 2.1

8 19°56.7' 155°15.3'

7 km ssw. of Laupahoeh

19 07 14 47.7 2.9

5 19°17.1' 155°09.5' 10 km SSElI of Makaopu

seismometer.

19 12 22 16.4 3.0 <3 19°18.0' 155°58.0' 12 km SW. of. Hookena 

20 19 37 15.2 3.7

8 19°21.9' 155°24.7' Kaoiki Fault system 

21 0.5 06 56.5 2.5

5 19°56.0' 155°13.6'

8 km SSE. of Laupahoeh

21 06 05 20.2 2.0

8 19°25.6' 155°19.2' 3 km W.o of Uwekahuna 

seismomet-er.

21 19 52 14.7 2.5 13 19°10.0' 155°30.7'

5 km SW. of Pahala

21 23 27 52.0 2.0

8 19°23.. 5' 155°24.2' Kaoiki Fault system

22 09 33 12.8 4.6 30 19°13.3' 155° 32. 3 t 7 km WNW. of Pahala 

22 11 06 30.2 2.4 30 19°1192' 155°30.2'

4 km WNW. of Pahala 

22 14 03 11.8

8 19°03.2' 155°18.5' 30 km E. of Naalehu 

22 14 22 16.8 2.2

5 19°16.1' 154°59.7' 10 km SSW. of Ka1apaha 

24 06 19 25.5 3.4

8 19°48.6' 155°33.3'

7 km NW. of Pohakuloa 
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological 

January, February, and March, 1965--Continued

Date Time Magni- Depth Epicenter 

(1965) h m s tude : (krn) Lat. N. Long. W. Description 

- - -

Mar. 24 20 16 38.1 2.0 27.5 19°17.9' 155°22.1' Beneath Kilauea sum

25 01 32 17.4 2.4 <3 19°12.4' 155°33.3' 8 km W. of Pahala 25 09 25 39.5 2.1 3 19°03.9' 155°12.0' 22 km S. of Apua Po

26 08 08 51.5 2.4 3 155°46.1' 16 km ENE. of 

Kealakekua.

27 06 25 43.7 2.3 40 19°24' 154°36' 38 km ESE. of Pahoa 

27 13 16 39.4 2.2 8 19°24.9' 155°24.5 1 Kaoiki Fault system 27 13 41 00.5 3.2 5 155°47.6' 13 krn ESE. of Hooken

28 01 50 08.6 2.2 3 19°15.2' 155°14.8' 15 km SSE. of Ahua 

seismometer.

28 13 34 20.9 2.0 35 19°07.5' 155°29.8' 12 km NE. of Naalehu 

30 10 01 22.9 3.1 5 19°08.0' 155°05.7' 17 km SEe of Apua 

Point.
Table 5.--Distant earthquakes

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

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

compressiona+ first motion·; a "d" indi·cates dilatational first motion.

Station symbbls, locations, and instrumentation are presented in

table 6. Magnitudes calculated from the Hawaii seismograms are followed

by (HVO'. Location of Jpicenter, origin times, focal depths, and

magnttude reported by other institutions are taken from "Preliminary

Determination of Epicenters" published by the U.SQ Coast and Geodetic

Survey.

C&GS card 5-65:

13:32:46.4

11.9° N., 126.2° E.

Philippine Islands region

h about 5 km

Magnitude 6.1 (eGs).

C&GS ··card 7-65:

21:08:06.0

13.2° S., 112.0° W.

Northern Easter ~sland Cordi~lera

h about 33 km

Magnitude 5.25-5.5 (Pas), 5 (Brk),

4. 9 (eGs).

Jan. 9

Jan. 8

13:44:34.5 c

34.8 c

34.1 c

35.5 c

34.6 c

36.2 c

35.6 c

33.3 c

14:07:21

22:15:00

22:15:45

Tmax

Tmax

Z

Z

Z iP

Z iP

Z iP

Z i~

Z iP

Z eP

Z eP

Z iP

PEZ eR

M

A

D

:MP

U

Pa

Hi

NB

U

Pa

NB.

J,anlJ 7

C8eGS card 3-65:

15:56:32.5

16.2° N., 97.2° w.

Oaxaca, Mex.,

Felt: Mexico City

h about 43 km

Magnitude 5.5 (eGs).

C&J3.S card 3-65:

18:05:58.6

20.3° S., 174.1° w.

Tonga Islands

h about 33 km

Magnitude 6.75 (Pas), 6.25

. (Brk), 6.0 lCGs).

M Z iP 16:06:03.0 d

A Z eP 02.2 d

D Z iP 03.1 d

:MP Z eP 01.6 d

U Z eP 02.2 d

Jan. 5, 1965

M Z eP 18:14:06.2 c

A Z eP 05.8 c

U PEE eS 18:20:33

U PEE iL 18:24:06

U PEZ eR 18:26.:08

23
Table 5. --Distant earthquakes--Continued

C&GS card 10-65:

17:42:12.3

13.0° B., 169.4° E.

Santa Cruz Islands region

h about 647 km

Magnitude 5.2 (eGs).

COOS card 8-65:

05:27:04.5

18.6° B., 178.1° w.

Fiji Islands region

h about 472 km

Magnitude 5.6 (CGS).

February 1, 1965

Jan. 21, 1965

M Z eP 06:19:50.9 d

A Z eP 50.1 d

IvTI? Z eP 50.3 d

U Z eP 50.5 d

C&GS card 15 -65:

06:09:58

34.2° S., 179.8° E.

South of Kermadec Islands

h about 33 km

Magnitude 5.75-6 (Brk), 5.9 .(cGS).

Jan. 24

M Z iP 00:23:27.4 c

A Z iP 27.4 c

D Z eP 26.9 c

IvTI? Z iF 27.5 c

u Z iP 27.5 c

Hi Z iF 29.2 c

NB Z iP 26.4 c

Na Z iP 25.7 c

Ke Z iP 24.7 c

u PEE is 00:34:01

U PEE eG 00:45:21

U PEZ eR 00:48:09

C&GS card 6-65:

00:11:12.1

2.4° B., 126.0° E.

Ceram Bea

Felt: Davao, Philippine

Islands; Halmahera~

h about 6 km

Magnitude 6.6 (CGS), 7.5 (HVO).

Jan 25

Jan. 30

M

A

D

IvTI?

WP

Pa

Na

M

A

D

IvTI?

U

Pa

Hi

NB

Ha

Na

Ka

Feb. 2

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

eP

iP

eP

iP

iP

iP

iP

eP

eP

eP

eP

eP

eP

iP

iP

iP

iP

iP

17:49:50.5 c

50.6 c

50.3 c

51.1 c

50.7 c

52.5 c

47.7 d

05:34:29.7 d

29.5 d

28.7 d

29.7 d

29.5 d

31.2 d

32.5 d

29.5 d

34.7 d

25.1 d

32.3 d

C&GS card 7-65:

16:44:18.7

l3.7° N., 144.3° E.

Mariana Islands

h about 139 km

Magnitude 5.4 (CGS).

C&GS card 8-65:

04:30:33.1

17.2° N., 94.5° w.

Chiapas, Mex.

h about 140 km

Magnitude 4.75 (Brk), 5.3 (CGS).

M

NP

z

z

iP

iP

16:53:58.3 c

58.7 c

24

A

D

IvTI?

U

z

z

z

z

iP

iP

iP

iP

04:40:08.7 c

09.6 c

08.3 c

09.0 c
Table 5.--Distant earthquakes--Continued

January 10, 1-96-5 Jan. 15

Jan. 11

Jan. 15

23:34:01

23:40:25

C&GS card 5-65:

10:43:17.5

24.5° S., 178.4° E.

South of Fiji Islands

h about 568 km

Magnitude 5.5 (eGs).

Jane 16

M Z iP 12:59:48.2 d

A Z iP 47.6 d

D Z eP 4606 d

:MP Z iP 47.7 d

u Z eP 47.6 d

Hi Z eP 50.4 d

Ka Z eP 50.1 d

C&GS card 5-65:

12:51:29

25.6° S., 180.0° w.

South of Fiji Islands

h about 445 km

Magnitude 4.9 (eGs).

Jan.' 17

M Z iP 10:51:2606 c

A Z iP 26.1 c

D Z iP 25.5 c

:MP Z iP 26.4 c

u Z iP 26.1 c

Hi Z iP 28.9 c

NB Z eP 25.3 c

Na Z iP 23.0 c

Ka Z eP 28.6 c

U PEZ eS

U PEZ eR

C&GS card 6-65:

23:17:36.0

13.3° S., 166.3° E.

New Hebrides Islands

h about 8 km

Magnitude 5.5 (C~S).

20:24:16.0 c

16.2 c

16.5 c

14.2 c

20:20:39.6 c

39.0 c

39.3 c

42.2 c

13:45:23.5 d

23.4 d

23.0 d

23.4 d

21.9 d

25.1 c

18.7 d

13:52:30

13:57:10

13:59:04

14:38:32

31

22

32

46

53

11

18

33

Z iP

Z iP

Z eP

Z eP

Z iP

Z eP

Z eP

PEN is

PEE iG

PEZ iR

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

C&GS card 3-65A:

13:36:30.7

13.5° B., 166.6° E.

New Hebrides Islands

h about 32 km

Magnitude 6.75 (Pas), 6.5 (CGS),

7 (HVO).

M Z iP

A Z eP

WP Z iP

Hi Z iP

C&GS card 8-65:

20:13:27.8

18.6° S., 178.7° w.

Fiji Islands region

h about 685 km

Magnitude 5.3 (CGG).

M Z _iP

D Z eP

U Z eP

NB Z iP

C&GS card 2-65:

20:14:33.5

43.0° N., 139.2° E.

Eastern Sea of Japan

h about 189 km

Magnitude 5.3 (CGS).

M

A

D

U

NB

Ha

Ke

U

U

U

M

A

D

U

NB

Ha

Na

Ke

Ka

25
February 4, 1965

Table 5. --Distant earthquakes--Continued

February 4--Continued

Feb. 4

COOS card 11-65:

04=33:09.5

3.9° N., 128.7° E.

North of Halmahera

h about 41 km.

C&GS card 9-65:

06:37:05.4

52.6° N., 172.0° w.

Rat Islands, Aleutian Islands

aftershock.

h about 35 km

Magnitude 5.7 (CGS).

MP z eP 04:44:55.7 c Hi

NB

z

z

eP

iP

51.4 c

51.1 c

COOS card 9-65:

07:23:12.3

51.9° N., 173.2° E.

Rat Islands, Aleutian Islands

aftershock.

h about 25 km

Magnitude 5.5 (CGS).

M Z eP 05:08:37.5 c

A r7

LJ eP 38.4 c

D Z eP 38.5 c

u Z eP 38.2 c

Pa Z eP 38.5 c

Hi Z eP 37.0 c

Ha Z eP 26.9 c

Ke Z eP 34.5 c

(All other phases lost }--

C&GS card 9-65:

05:01:21.8

51.3° N., 178.6° E.

Rat Islands, Aleutian Islands

Seismic sea wave generated

h about 40 km

Magnitude 7.75 (Pas), 7.75 (Brk~.,

7 0 5 (CGS -ML) .

Feb. 4

NB

Feb. 4

M

Hi

NB

Na

z

z

z

z

z

eP

iP

eP

iP

eP

07:30:54.1 d

07:51:27.4 d

26.8 d

27.1 d

30.2 d

C&GS card 14-65:

06:04:58

51.7° N., 174.9° E.

Rat Islands, Aleutian Islands

aftershock.

h about 35 km

Magnitude 6.1 (CGS).

Feb. 4

M

Hi

z

z

eP

eP

06:12:29.7 d

29.5 d

C&GS card 9-65:

07:43:43.2

52.7° N., 172.9° E.

Rat Islands, Aleutian Islands

aftershock.

h about 33 km

Magnitude 5.5 (CGS).

Feb. 4

M Z eP 06:44:51.2 c

A Z eP 52.2 c

D Z eP 52.2 c

MP Z eP 52.5 c

26
Table 5. --Distant earthquakes--Continued

February 4, 1965 Feb. 4

M Z iP 08:14:02.2 d M Z Tmax 10:22=50

A Z eP 03.4 d Ha Z Tmax 20

D Z eP 02.8 d

MP Z eP 03.7 d C&GS card 9-65:

NB Z iP 01.8 d 09: 35:20.3

51.8° N., 176~3° E.

C&GS card 9-65: Rat Islands, Aleu:tian Islands

08:06:16.6 aftershock.

51.9° N., 174.3° E. h about 30 km

Rat Islands, Aleutian Islands Magnitude 5.2 (eGs).

aftershock.

h about 40 km Feb. 4

Magnitude 5.6 (eGs).

M Z Tmax 10:24:53

Feb. 4 Ha Z Tmax 30

M Z eP 08:47:53.4 c C&GS card 14-65:

A Z eP 54.5 c 09:37:28.4

D Z eP 54.4 c 51.8° N., 176.3° E.

MP Z eP 54'''7 c Rat Islands, Aleutian Islands

U Z eP 54.. 2 c aftershock.

Pa Z eP 54.7 c h about 25 km

Hi Z iP 52.7 c Magnitude 5.3 (CGS).

NB Z eP 53.2 c

Ha Z iP 43.0 c Feb. 4

Na Z eP 08:47:54.6 c .....-

Ke Z eP 51.0 c M Z eP 12:13:54.6 d

M Z Tmax 09:27:55 A Z eP 55.7 d

A Z Tmax 53 D Z eP 55.4 d

D Z Tmax 09:27:52 MP Z eP 56.1 d

MP Z Tmax 59 Hi Z eP 53.9 d

U Z Tfl?ax 56 NB Z eP 53.9 d

Pa Z Tmax 48 Ha Z iP 43.9 c

Hi Z Tmax 54 Na Z eP 57.6 d

NB Z Tmax 56 Ke Z iP 52.8 d

Ha Z Tmax 09:25:44 U PEZ eS 12:20:12

Na Z Tmax 09:28:01 U PEZ eR 12:25:00

27

C&GS card 9-65:

08:40:40.9

51.3° N., 179.5° E.

Rat Islands, Aleutian Islands

aftershock.

h about 40 km

Magnitude 6.75-7 (Pas), 6.4 (eGs).

C&GS card 9-65:

12:06:04.3

52.6° N., 172.1° E.

Rat Islands, Aleutian Islands ;a.,ftershpck~

h about ~) krn

Magnitude 6.5 (Pas), 5.8 (CGS),

6.5 (HVO).
Table 5. --Distant earthquakes--Continued

COOS card 9-65:

20:47:13.3

51.9° N., 174.6° E.

Rat Islands, Aleutian Islands

aftershock.

h about 35 km

Magnitude 5.7 (cas).

C&GS card 9-65:

09:32:09.3

52.3° N., 174.3° E.

Rat Islands, Aleutian Islands

aftershock.

h about 41 km

Magnitude 5.5 (Brk), 6.5 (Pas),

5. 9 (CGS ), 6. 3 (HVO).

Feb. 5

M Z eP 09: 39·: 45.3 d

A Z eP 46.4 d

D Z eP 46.5 d

U Z eP 46.0 d

Pa Z eP 47.7 d

Hi Z iP 45.2 d

NB Z iP 44.9 d

Ha Z iP 33.7 c

Na Z eP 47.5 d

Ke Z eP 43.7 d

U PEZ eS 09:45:56

U PEE eG 09:49:06

U PEZ eR 09:50:38

Ha Z Tmax 10:19:59

C&GS card 14-65:

22:15:59.5

51.5° N., 176.7° E.

Rat Islands, Aleutian

aftershock.

h about 25 km

Magnitude 5.6 (CGS).

February 4, 1965

M z iP 14:26:23.9 d

A Z eP 25.0 d

D Z eP 24.9 d

VlP Z eP 25.2 d

U Z eP 24.5 d

Ha Z iP 12.9 d

u· PEE is 14:32:46

U PEE iG 14:36:00

U PEZ iR 14:37:52

Ha Z Tmax 15:09:51

C&G·S card 9-65:

l4: 1.8: 27. 9

53.0° N., 171.0° E.

Rat Islands, Aleutian Islands

8,ftershock.

h about 30 km

Magnitude 6.25 (Pas), 5.7 (cGS).,

6.5 {HVO).

Feb. 4

M Z iP 15:59:19.3 d

A Z eP 20.3 d

D Z eP 20.1 d

MP Z eP 20.7 d

U Z eP 20.1 d

Pa Z eP 20.8 d

Hi Z iP 18.6 d

NB Z iP 18.8 d

Ha Z iP 07.5 c

Na Z iP 21.6 d

u PEE eG 16:09:00

U PEZ eR 16:10:52

Ha Z Tmax 16:42:33

C&GS card 9-65:

15=51:25.5

53.1° N., 170.8° E.

Rat Islands, Aleutian Islands

aftershock.

h about 40 km

Magnitude 6~25 (Pas), 5.7 (CGS),

6.5 'HVO) ..

28

Feb-. 5

u

Feb. 5

A

PEZ

z

iR

eP

21:05:42

22:23:46.7 c

Islands
February 6, 1965

Table 5. --Distant earthquakes--Continued

Feb. 6

C&GS card 11-65:

01:40:33.2

53.2° N., 161.9° w.

South of Alaska

h about 33 km

Magnitude 6.. 4 (eGs), 6. 5 (HVO).

C&GS card 13-65:

16:50:29

53.3° N., 161.8° w.

South of A:t-as~a

h about 33 km

Magnitude 6.5 (Pas), 6025-6.5 (Brk),

6-6.25 (Pal), 6.1 (CGS),

6.5 (HVO).

M

A

D

l\1P

U

Pa

Hi

NB

Ha

Na

Ke

U

U

U

M

A

MP

U

Pa

NB

Ha

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

PEZ

PEE

PEZ

Z

Z

Z

Z

Z

Z

Z

iP

eP

iP

iP

iP

eP

iP

iP

iP

iP

iP

is

iL

iR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

01:47:16.2 d

17.4 d

17.5 d

17.5 d

16.9 d

17.1 d

14.4 d

16.3 d

04.6 d

20.6 d

15.6 d

01:52:43

01:54:31

01:55:53

02:25:12

23

02:25:26

36

06

52

02:23:38

M

A

D

MP

U

Hi

NB

Ha

Na

Ke

U

U

U

M

A

l\1P

U

NB

Ha

Z

Z

Z

Z

Z

z·

Z

Z

Z

Z

PEZ

PEE

PEZ

Z

Z

Z

Z

Z

Z

iP

eP

iP

eP

eP

eP

iP

eP

eP

iP

is

iL

iR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

16:57:12.0 d

13.1 d

13.0 d

13.3 d

12.7 d

10.5 d

11.8 d

01.8 d

1601 d

11.5 d

17:02:43

17:04:27

17:05:51

17:35:41

42

34

40

31

17:34:07

Feb. 6 Feb. 7

C&GS card 14-65:

04:02:53

52.1° N., 175.7° E.

Rat Islands, Aleutian Islands

aftershock.

h about 35 km

Magnitude 6 (Pal), 5.9 (CGS).

C&GS card 9-65:

02:17:09.2

51.4° N., 173.4° E.

Rat Islands, Aleutian Islands aftershock

h about 40 km

Magnitude 6.0 (cas).

M

A

D

MP

Hi

NB

U

U

U

Ha

z

z

Z

Z

Z

Z

PEZ

PEN

PEZ

Z

eP

eP

eP

eP

iP

iP

eS

eG

iR

Tmax

04:10:23.5 c

24.5 c

24.5 c

24.9 c

23.2 c

23.6 c

04:16:23

04:19:03

04:20:46

04:50:18

9

A

D

:MP

U

Hi

NB

Na

U

Z

Z

Z

Z

Z

Z

Z

PEZ

iF

eP

eP

iP

eP

eP

eP

eR

02:24:44.8 c

45.0 c

45.3 c

44.3 c

43.9 c

44.1 c

45.8 c

02:34:51
Table 5. --Distant earthquakes --Continued

February 7, 1965

M z iP 04:18:52.2 c

A Z eP 53.2 c

D Z eP 53.2 c

MP Z eP 54.3 c

U Z eP 52.0 c

HJ Z iP 51.6 c

NB Z eP 52.2 c

U PEZ eR 04:29:31

C&GS card 9-65:

04:11:19.3

51.9° N., 175.3° E.

Rat Islands, Aleutian Islands

aftershock.

h about ~\5 km

Magnitude 5.5 (CGS), 5.4 (RVO).

Feb. 9

M Z iP 05:50:51.1 c

A Z eP 50·9 c

D Z eP 50.3 c

U Z eP 51.1 c

Pa Z iP 53.0 c

Hi Z eP 53.5 c

Na Z iP 47.7 c

C&GS card 18-65:

05:42:06.8

18.8° S., 169.2° E.

New Hebrides Islands

h about 223 km

Magnitude 5.5 (CGS).

Feb. 12

C&GS card 10-65:

15:46:49.9

55.1° N., 165.7° E.

Komandorsky Islands region.

h about 40 km

Magnitude 5.6 (CGS).

C&GS card 9-65:

09 :25: 51.1

51.4° N., 179.1° E.

Rat Islands, Aleutian Islands

aftershock.

h about 30 km

Magnitude 5.3 (CGS), 5.5 (RVO).

Feb~ 8

Feb. 7

Feb. 12

eP 00:50:49.3 c

Tmax 01: 30: 52

z

z

C&GS card 12 -65 :

00:43:17.1

51.5° N., 175.8° E.

Rat Islands, Aleutian Islands

aftershock.

h about 33 km

Magnitude 5.75 (Pas), 5.4 (CGS).

A

Ra

C&GS card 14-65:

00:55:06.2

52.2° N., 172.8° E.'

Rat Islands, Aleutian Islands

aftershock.

h about 25 km

Magnitude 6.. 0 (Pas)~ 5-5-5.75 (Pal),

5.5 (CGS), 5.8 (RVO}.

M Z eP 01:02:49u3 c

A Z eP 50·3 c

D Z eP 50.0 c

MP Z eP 50.5 c

NB Z eP 48.5 c

U PEN eS 01:09:10

U PEE eG 01:12:06

U PEZ eR 01:14:06

Ha Z Tmax 01:44:36

30

09:33:05.6 c

09:38:47

09:43:07

15=55:14.2 c

14.5 c

13.6 c

16:05:55

eP

eP

eP

eG

eP

is

iR

Z

PEZ

PEZ

Z

Z

Z

PEN

u

U

IT

U

Pa

Hi

U
Table 5.--Distant earthquakes--Continued

February 12, 1965

Pa Z Tmax 11:32:18

NB Z Tmax 50

Ha Z Tmax 10

C&GS c~rd 13-65:

10:50:19.7

40.3° N., 124.9° w.

Near coast of northern Calif.

h about 33 km

Magnitude 5.3 (CGS).

Feb. 12

Feb. 15--Continued

Ke Z iP 17.6

C&GS card 023-65:

10:43:19.8

3.0° N., 125.9° E.

Ta1aud Islands

h about 33 km

Magnitude 6.0 (eGs).

Feb. 17

Ha z Tmax 21: 31: 56

M Z

A Z

NB Z

iP

eP

eP

10:26:14.8 d

15.6 d

14.7 d

COOS card 13-65:

20:50:46

40.3° N., 124.7° w.

Near coast of northern Calif.

h about 33 km

Magnitude 4.9 (CGG).

Feb. 15

U PEZ eR 01:42:20

C&GS card 12-65:

01:25:08.8

51.4° N., 179.4° E.

Rat Islands, Aleutian Islands

aftershock.

h about 42 km

Magnitude 5.8 (CGS).

Feb. 15

Ha Z Tmax 07:27:14

C&GS card 21-65:

06:42:11.2

51.4° N., 179.5° E.

Rat Islands, Aleutian Islands

aftershock.

h about 28 km

Magnitude 4.9 (CGS).

Feb. 15

M Z iP 10:55:20.9 c

A Z iP 21.0 c

D Z iP 20.4 c

MP Z iP 21.. 2 c

U Z iP 20.9 c

Hi Z iP 22.2 c

NB Z iP 19.9 c

Ha Z iP 18.5 c

Na Z eP 18.9 c

31

C&GS card 12-65:

10:18:51.3

51.8° N., 176.6° E.

Rat Islands, Aleutian Islands

aftershock.

h about 44 km

Magnitude 5~5.25 (Brk), 5.6 (CGS).

Feb. 18

M Z iP 23:20:51.2 c

A Z iP 52.4 c

D'- Z eP 52.3 c

MP Z iP 52.8 c

u Z iP 52.2 c

Pa Z iP 52.3 c

Hi Z iP 50.5 c

Ha Z iP 38.6 c

u PEZ iR 23:30:54

C&GS card 14-65:

23:13:36.3

51.4° N., 179.1° E.

Rat Islands, Aleutian Islands

aftershock.

h about 28 km

Magnitude 6 (Pas), 5 (Brk),

5.5-5.75 (Pal), 5.4 (CGS).
Table 5.--Distant earthquakes--Continued

Feb .. 25

M z eP 05:29:54.8 c

A Z eP 5507 c

D Z eP 55.6 c

1vlP Z eP 56.1 c

32

22:25:02.6 d

01.7 d

01.9 d

01.2 d

04.4 d

22:35:36

22:37:24

22:42:44

22:50:20

22:54:22

00:09:21

09

10

12

05

09

06

19

00:10:54

Mar. 1

M Z eP 07:30:42.7 d

D Z eP 41.6 d

Na Z eP 38.6 d

NB Z eP 4103 d

Feb. 26

M Z iF 23:48:10.5 d

A Z iP 09.6 d

MP Z iP 09.5 d

U Z iP 09.7 d

NB Z eP 11.4 d

Ke Z eP 12.7 d

5504 c

57.4 c

Islands

Feb. 25--Continued

U Z eP

Na Z eP

C&GS card 21-65:

05:22:14.5

52.1° N., 173.2° E.

Rat Islands, Aleutian

aftershock.

h ab.out 35 km

Magnitude 5.6 (CGS).

C&GS card 024-65:

07:20:55.3

5.5° S., 152.1° E.

New Britain region

Felt at Rabaul, Doi1ene, and Karlai

h about 35 km

Magnitude 5.75-6 (Pal), 5.7 (eGs),

5.25-5. 5 (Brk).

C&GS card 16-65=

'23:36:12.2

6.9° N., 13.0° W.

Northern Colombia

Felt at Bogota, Bucaramanga,

and Calcutta.

h about 146 km

Magnitude 5.75-6 (Brk), 5.7 (eGs).

Feb. 27

U PEZ eR 08:04:29

C&,GS card 20-65:

07:46:29.1

28.5° N., 112.1° W.

Gulf of Calif.

h about 33 km

Magnitude 503 (CGS).

Febo 25

M Z eP 05:01:14.9 d

D Z iP 13.9 d

MP Z eP 13.7 d

Na Z eP 12.3 d

U PEN eS 05:09:09

U PEN iG 05:15:25

U PEZ eR 05:17:49

C&GS card 024-65:

04:51:27.8

5.50So, 15200° Ee

New Britain region

h about 35 km

Magnitude 605 (Pas), 6.25-6.5

(Brk), 5.9 (CGS),

605 (RVO).

Feb. 23

M Z eP

A Z iP

D Z iP

MP Z iP

Ke Z eP

U PEE iSKS

U PEZ iPS

U FEZ iSS

U PEN' eG

U PEZ iR

M Z Tmax

A Z Tmax

D Z. Tmax

MP Z Tmax

U Z Tmax

Pa Z Tmax

Hi Z Tmax

NB Z Tmax

Ha Z Tmax

C&GS card 20-65:

22:11:5002

25.7° S., 70.5° w.

Near coast of northern Chile.

1 killed, 5 injured and heavy

damage 0

h about 80 km

Magnitude 7025 (Pas)~ 6.75 (Brk),

6.75-7 (Pal), 6.2 (CGS),

7025 (RVO).
Table 5. --Distant earthquakes--Continued

March 1, 1965

M Z eP 13:32:49.9 d

D Z iP 49.9 d

C&GS card 023-65:

13:20:56.7

21. 2° N., 121. 2° E.

Taiwan region

h about 42 km

Magnitude 5.5 (CGS).

Mar. 1

M Z eP 19:29:40.3 c

D Z eP 41.1 c

MP Z eP 41.8 c

U Z eP 41.0 c

Hi Z eP 40.0 c

NB Z eP 39.6 c

Ha Z eP 27.8 c

Ke Z eP 38.0 c

C&GS card 17-65:

19:22:01.6

52.2° N., 173.9° w.

Rat Is1ands~ Aleutian Islands

aftershock.

h about 30 km

Magnitude 5.5 (CGS).

Mar. 1

M Z eP 21:42:07.9 d

A Z eP' 07.1 d

D Z eP 07.7 d

U Z eP 07.2 d

Pa Z eP 04.7 d

Hi Z iP 05.4 d

NB Z eP 09.2 d

Ha Z eP 12.2 d

Ke Z eP 10.5 d

M Z ipF 31.7 c

A Z epP 30.7 c

D Z ipP 31.4 c

u Z epP 31.0 c

U PEN eS 21:50:19

U PEN eG 21:56:41

33

Mar. 1, 1965--Continued

C&GS card 023-65:

21:32:11.8

15.4° N., 92.5° w.

Mexico-Guatemala Border region

Felt at San Salvador

h about 93 km

Magnitude 6 (Pas), 5.5 (Brk),

5.75-6 (Pal),

5.9 (CGS), 6 (HVO).

Mar. 1

~1 Z eP 22:00:06.9 c

Pa Z iP 07.8 c

NB Z eP 05.9 c

Ha Z eP 11.2 c

Ke Z iP 04.7 c

C&GS card 024-65:

21:52:04.4

23.5° S., 179.0° E.

South of Fiji Islands

h about 541 km

Magnitude 5.2 (CGS).

Mar. 3

M Z eP 15:24:01.5 d

U Z eP 01.0 d

Pa Z eP 04.2 d

NB Z eP 15:23:59.7 d

U PEE is 15:31:56

U PEE eG 15:37:54

U PEZ iR 15:40:34

C&GS card 026-65:

15:14:09.7

5.50S., 151.9° E.

New Britain region

h about 44 km

Magnitude 6.75-7 (Pas), 6.5-6.75

(Brk)~ 7.25-7.5 (Pal),

6.0 (CGS), 6.5 (HVO).
Table 5.--Distant earthqu~kes--Continued .

C&GS card 17-65:

16:47:25.7

53.1° N., 171.2° E.

Rat Islands J Aleutian Islands

aftershocK.

h about 23 km

Magnitude 5.6 ~CGS).

Mar. 4

March 3, 1965

MP

NB

z

z

eP

eP

16:55:21.4 c

19.7 c

Mar. 8

Pa Z iP 19:31:50.7 c

Hi Z iP 50.9 c

NB Z iP 48.5 c

Ha Z eP 52.6 c

C&GS card 025-65:

19:22:45.6

22.3° S., 171.4° E.

Loyalty Islands region

h about 125 km

Magnitude 5.75-6 (Brk),

5.4 (CGS).

C&GS card 025-65:

15:04:16.2

17.7° S., 178.9° w.

Fiji Islands region

h about 589 km

Magnitude 4.5-4.75 {Brk),

5.0 (COO).

C&GS card 024-65:

01:48:54.1

5.40s., 1~7.0° E.

East New Guinea region

Felt at Lae and Aiome

h about 191 km

Magnitude 6.4 (CGS).

M Z iP 01:58:56.9 d

A Z eP 56.5 d

D Z iP 55.8 d

MP z eP 56.8 d

U Z iP 56.5 d

Hi Z iP 58.5 d

NB Z eP 55.2 d

Ha Z iP 54.6 d

Ke Z iP 52.7 d

Mar. 8

01:44:04.0 c

02.4 c

iF

eP

z

z

Mar. 9

Mar. 10

C&GS card 023-65:

01:36:45.4

17.0° S., 177.4° w.

Fiji Islands region

h about 386 km

Magnitude 5. 75 -6 '(Bks),

5.5 (CGS).

Hi

Ke

C&GS card 023-65:

15:53:37.8

21.9° B., 179.6° E.

South of Fiji Islands

h about 547 km

Magnitude 5.7 (CGS).

M Z iP 16:01:28.2 d

D Z eP 27.0 d

U Z eP 27.7 d

Hi Z iP 30.6 d

NB Z iP 27.8 d

Ha Z iP 33.0 d

Na Z iP 24.2 d

Mar. 10

M Z Tmax 22:38:24

A Z Tmax 32

D Z Tmax 20

U Z Tmax 33

Ha Z Tmax 22:36:42

34

15:11:31.4 c

33.7 c

29.4 c

28.0 c

iP

iP

eP

iP

z

z

z

z

Pa

Hi

NB

Ke
Table 5. --Distant earthquakes--Continued

Mar. 1,0, 1965--Continued

C&GS card 026-65=

21:52:57.6

56.3° N., 155.6° w.

Alaska Peninsula

h about 33 km

Magnitude 5.0 (CGSj.

Mar. 14

U PEZ iP 16:07:14 c

Hi Z ipl 16:11:15.8 c

NB Z ip1 16:11:16.3 c

U PEN iSKS 16:17:34

U PEN" eS 16:19:06

U PEN iPS 16:21:20

U PEN esSS 16:28:18

U PEN eG 16:39:02

C&GS card 026-65:

15:53:06.6

36.3° N., 70.7° E.

Hindu Kush region

Light damage in Afghanistan

and West Pakistan.

Felt in India

h about 219 km

Magnitude 7.75 (Brk), 7.5-7.75

(Pas), 6.6 (eGs),

7.5 (HVO).

March 16

NB Z eP 16:.55: 52.9 c

Na Z iP 56.5 c

u PEN is 17:03:45

U PEN eG 17:09:25

U PEZ eR 17:11:45

C&GS card 025-65:

16:46:15.5 .

40.8° N., l42!9° E.

Near east coast of Honshu, Japan

Felt at Morioka and Aomori

h about 34 km

Magnitude 6.5 (Pas), 6.5-6.75 (Pal),

5.6 (eGs), 6.1 (HVO).

35

Mar. 17

M Z iF 12:53:04.3 c

A Z eP 04.7 c

WP Z iP 04.6 c

MP Z iP 05.2 c

C&GS card 029-65:

12:41:08.8

'1.2° N., 126.8° E.

Molucca Passage

h about 68 km

Magnitude 5.1 (CGS).

Mar. 17

M Z iP 14:35:02.7 d

A Z iP 03.7 d

D Z iP 03.3 d

MP Z eP 04.4 d

U Z iP 03.2 d

Hi Z eP 02.6 d

NB Z iP 02.3 d

Na Z iF 05.1 d

C&GS card 025-65:

14:27:12.4

52.8° N., 171.9° E.

Near Islands, Aleutian Islands

Felt on Shemya

h about 23 km

Magnitude 6.0 (CGS).

Mar. 18

M Z iP 06:29:58.5 d

A Z iP 58.0 d

D Z eP 57.4 d

MP Z iP 58.2 d

WP Z iP 58.0 d

Pa Z eP 59.7 d

Hi Z iP 06:30:01.0 d

NB Z iP 06:29:57.5 d

Na Z eP 54.5 d

U PEE eS 06:36:10

U PEE isS 06:37:28

U PEE iSS 06:40:44
Table 5. --Distant earthquakes --Continued

Mar. 19--Continued

C&GS card 028-65:

22:58:34.9

0.0° N., 123.4° E.

Northern Celebes

h about 173 km

Magnitude 5.6 (CGS).

March 18, 1965--Continued

C&GS card 026-65:

06:22:02.9

19.9° B., 176.1° w.

Fiji Islands region

h about 151 km

Magnitude 5.5 (eGs).

Mar. 18

NB

Na

z

Z

iP

eP

C&GS card 026-65:

16:15: 56.1

17.7° B., 178.9° w.

Fiji Islands region

h about 507 km

Magnitude 5.1 (CGS).

M Z iP 16:23:16.8 c

A Z iP 16.4 c

M Z iP 16.5 c

u Z iP 16.5 c

Pa Z eP 18.1 c

Hi Z iP 19.4 c

NB Z eP 15.8 c

Na Z iF 12.7 c

Ka Z e·P 19.7 c

Mar. 19

M

A

Hi

NB

z

z

z

z

iP

eP'

eP

eP

16:33:30.9 c

31.1 c

32.6 c

29.7 c

Mar. 21

M Z iP 11:20:21.7 c

A Z eP 21.9 c

D Z eP 21.3 c

:MP Z eP 22.5 c

Pa Z eP 24.7 c

Hi Z eP 23.8 c

NB Z eP 20.5

Ke Z eP 18.4 c

U PEE iPPB 11:31:16

U PEZ iG 11:44:11

C&GS card 030-65:

11:08:16.2

1.5° B., 126.5° E.

Molucca Bea

h about 33 km

Magnitude 6.75 (Pas), 6.75 (Brk),

6. 25 -6. 5 (Pal),

6.2 (eGB).

Mar. 22

C&GB card 029-65:

16:20:51.4 M Z eP 02:52:10.4 c

2.0° B., 119.8° E. A Z eP 09.8 c

Celebes D Z eP 09.2 c

h about 46 km MP Z eP 10.2 c

Magnitude 5.0 (CGS ). U Z eP 10.2 c

Pa Z eP 12. n

'-

Mar. 19 Hi Z eP 13.3 c

M Z iP 23:10:38.5 c Na Z iP 07.0 c

A Z iP 38.7 c Ke Z eP 07.9 c

D Z iP 37.7 c u PEN eS 02:58:18

MP Z eP 39.2 c U PEE eG 03:00:46

U Z iP 38.7 c u PEZ iR 03:02:34

Pa Z eP 39.9 c

Hi Z iP 40.0 c

36
Table 5. --Distant earthquakes--Continued

C&GS card 033-65:

22:42:09.6

8.40 N., 126.6° E.

Mindanao, P 11 I.

h about 51 km

Magnitude 5.8 (CGS).

C&GS card 030-65:

13:22:57.6

55.1° N., 162.1° E.

Near east coast of Kamchatka

h about 33 km

Magnitude 5.9 (CGS).

March 22, 1965--Continued

C&GS card 035-65:

02:44:47.5

15.3° S. J 173.4° w.

Tonga Islands

Felt at Apia

h about 51 km

Magnitude 6.5 (Pas), 6~6.25 (Brk~

6. 5-6.75 (Pal),

5.9 (CGS), 6.2 (HVO).

Mar. 23-24

M Z eP 00:01:27.4 c

A Z eP 26.,9 c

D Z iP 26.2 c

U Z eP 27.2 c

Hi Z eP 30.1 c

Na Z iP 24.1 c

U PEZ eS 00:07:12

U FEZ eR 00:11:16

C&GS card 036-65:

23:54:14.7

15.2° S., 173.5° W.

Tonga Is1and~ felt at Apia

h about 130 km

Magnitude 6.5 (Pas), 5.9 (Brk),

6.25-6. 5 (Pal),

5.7 (CGS), 6.1'(HVO).

Mar. 24

M Z Tmax 08:54:29

A Z Tmax 46

D Z Tmax 23

U Z Tmax 33

Pa Z Tmax 36

C&GS card 031-65:

08:08:05.2

56.6° N., 152.4° W.

Kodiak Island region

h about 30 km

Magnitude 5 (Brk), 6 (Pal))

5.2 (CGS).

Mar. 24

WP

Mar. 28

IY1P

Pa

Hi

Mar. 28

M

A

MP

U

Pa

Hi

NB

Na

Ke

U

U

U

M

A

D

MP

U

Pa

Hi

, NB

Na

37

Z

z

z

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

PEZ

PEE

PEZ

Z

Z

Z

Z

Z

Z

Z

Z

Z

eP

eP

iP

eP

eP

iP

iP

eP

iP

iP

iP

iP

eP

iPP

is

iR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

22:53:58.5 c

13:31:37.9 c

39.. 1 c

36.8 c

16:46:35.9 d

34.5 d

34.2 d

34.9 d

3300 d

34.8 d

37.1 d

34.9 d

38.5 d

16:50:40 c

16:58:07

17:16:59

18:32:33

27

25

23

27

12

24

52

24
Table 5. --Distant earthquakes--Continued

March 28, 1965--Continued

C&GS card 028-65:

16:33:14.6

32.4° S., 71.2° w.

Near coast of central Chile

About 400 dead or missing,

many injured, and extensive

property damage in central

Chile.

h about 61 km

Magnitude 7-7.25 (Pas), 6.4 (CGS),

7.5 (HVO).

Mar. 29

M Z eP 10:57:17.3 c

D Z eP 17.9 c

MP Z eP 18.5 c

U Z eP 18.0 c

Hi Z eP 17.9 c

NB Z eP - 16.6 c

Na Z eP 17.9 c

U PEE is 11:05:14

U FEZ iR 11:13:20

March 30, 1965--Continued

Hi Z eP 16.5 d

NB Z eP 17.3 d

Ha Z iP 05.7 d

Ke Z iP 16.5 d

u PEE is 02:40:12

U PEN iG 02:42:44

A Z Tmax 03:14:50

D Z Tmax 47

MP Z Tmax 44

U Z Tmax 49

Ha Z Tmax 03:13:04

C&GS card 030-65:

02:27:07.2

50.6° N., 177.9° E.

Rat Islands, Aleutian Islands

Felt at Amchitka

Magnitude 7-7.25 (Pas),

6.75-7 (Brk), 7.75 (Pal),

7.1 (HVO).

Mar. 31.

C&GS card 036-65:

23:57:33.5

28.7° B., 178.4° w.

Kermadec Islands

h about 228 km

Magnitude 4.4 (Brk), 5.2 (CGS).

C&GS card 031-65:

10:47:37.6

40.8° N., 142.8° E.

Near east coast of Honshu,

Japan.

h about 33 km

Magnitude 6.1 (eGs), 6. 3 (HVO).

Mar. 29-30

M z iF 00:06:26.8 c

U PEZ iPP 10:08:06 d

U FEZ ePS 10': 18: 04

U PEE iSS 10:24:48

U PEZ e8BS 10:29:44

U PEE eG 10:38:44

U PEZ e 10:45:44

C&GS card 034-65:

09:47:30.7

38.6° N., 22.4° E.

Greece

3 killed, 16 injured, major

property damage at Patras

and Agrinion.

Felt in southern Italy

h about 78 km

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

6.5-6.75 (Pal), 6.3 (CGS).

Mar. 30

M

A

D

U

Z

Z

Z

Z

iF'

eP

eP

eP

02:34:17.6 d

18.9 d

18.6 d

18.4 d

38
Table 6.--u.s. Geological Survey seismograph stations in Hawaii

ECluipment

(Z, vertical; N, north-south; E

east-west)

Altitude

em)

above sea

level

Location

Lat. N. Long. W.

Station Symbol

M 19°2908' 155°23.3' 2,010

A 19°22.4 f 155°15.9' 1,070

D 19°20.2' 15·5° 23. 3' 815

N 19°24.9' 155°17.0' 1,115

WP 19°24.7' 155°17.5' 1,115

MP 19°21.8' 155°10.7' 885

Uwekahill1a

-(Hawaiian

Volcano

Observatory)

Maill1a Loa

Ahua

Desert

North Pit

West Pit

Makaopuhi

u 1,240 Long-period Press-Ewing: N, E, 

{Seismometer and galvanometer 

15 and 90 seconds, respective

Short-period Sprengnether: E, 

Short-base liqUid-level

Remote recording HVO-2: z-·

Do.

Doo

Do.

Do.

100 sec. Benioff with transisto

amplifier: Z. Wired into HVO

system.

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

galvanometer periods of 0.5 second. Overdamping of both seismometer and galvanometer 

used to control the strong galvanometer reaction. This seismograph has a peak magnifi

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

2/HVO-2 is a moving-coil, vertical-component seismograph with a seismometer perio

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

Observatory, where it is recorded on smoked paper. The response of this seismograph i

similar to that of HVO-l. Records from these eeismographs at M, A, and D, and N, WP, 

MP "(Benioff) are recorded on two 3-component drums to permit more accurate comparison 

arrival times at these stations.
Table 6.--u.s. Geological Survey seismograph stations in Hawaii--Continued

Station Symbol Location

Lat. N. Long. W.

Altitude

(m)

above sea

level

Equipment (Z, vertical; N, north-so

+:-

o

Hilo

Kipapa Oahu

Naalehu

Pahoa

Kamuela

Haleakala

North Bay

Installed

3/12/64

Kealakekua

Installed

1/28/64

Hi

Kip

Na

Pa

Ka

Ha

NB

Ke

20°01.9' 155°42.0'

20° 6.0' 156°15.0'

20

205

·205

740

2,090

4,005

505

HVO-l: Z.

Wood-Anderson: N, E. 

Thecla at St. Joseph

HVO-l: Z. Operated by U

Geodetic Survey.

1.0 sec. seismomet

galvanometer: Z. Ope

Thompson at Naalehu Sch

HVO-l: Z. Operated by M

Pahoa school.

HVO-l: Operated by Mr. E

Preparatory Academy, Ka

HVO-l: Z. Wood-Anderson

by the staff of Haleak

Maui.

0.8 sec. EV-17: Z. with 

Operated by U.S. Weath

1.0 sec. EV-17, 0.2 sec. 

Z. Wood-Anderson: N, 

H. Nelson at Kona Coun
Table 7.--U.S. Geological Survey tiltmeter stations in Hawaii

Station Symbol Location Fi'requency Base

Lat. N. Long. W., of 'Length Description

Reading M

Tree Molds TM 19°26.3' 155°17.3' Quarterly 50.79 NS. and EW.

Sand Spit SS 19°24.1' 155°16.8' --do----- 25.40- Equilateral

Triangle.

Kalihipaa Kal 19°21.4' 155°15.3' --do----- 50.79 NS. and EW.

Keamoku l<ea 19°25.1' 155°19.0' --do----- 47.55 Equilateral

Triangle.

Ahua Kamokukolau Kam 19°22.7' 155° 16..-6' --do----- '50.79 Do.

Kipuka Nene KN 19°19.4' 155°16.7' --do----- 50.79 Do.

Hilina Pa1i HP 19°18.2' 155° 18.6' --do----- 47.73 Do.

Kapapa1a Ranch Kap 19°20.5' 155°23.8' --do----- 50079 ,'Do.

Mehana M 19°26.2' 155°14.3' --do----- 25.00 ., ..Do.

Uwekahuna U 19°25.5' 155°17.4' --do----- 50.79 Do.

Uwekahuna Vault 19°25.4' 155°17.6' Daily 3.48 NS. and EW.

41
The following persons or agencies reported "felt" earthCluakes

during the 1st quarter, 1965. Their assistance is gratefully acknowledged.

Kilauea summit area

Mr. and Mrs. G. Yong

Mr. and Mrs. H. W. Mist

Mrs. V. Hansen

Mr. A. Yamamoto

Mrs. C. K. Wentworth

North Hawaii

Mrs. E. Van Gorder

Mr. Y. Kojima

Mrs. E. Christensen

Mrs. A. Wal~er

Mrs. R. Eklund

Mrs. E. Lindsey

Kona

Mr. Jolmston

Mr. M. Sutherland

Mr. E. Glass

Miss A. Greenwell

Mrs. Isbell

Miss N. Wallace

Mrs. Schattauer

Kau

Mr. W. Meinecke

Mrs. A. Paiva

Mrs. aliviera

Naalehu Police Station

Lt. Araujo

Mrs. C. Ashton

42

Hilo region

Mr. R. Baldwin

Mrs. H. Lewis

Mrs. H. Baldwin

Mrs. T. Crabb

Mr. J. Bryan

Mrs. B. Shaffer

Miss E. Patten

Mr. H. Pierce

Puna

Mr. R. Williamson

Mrs. Torigoe

Mr. R. Edwards

Mrs. Guerino

Mr. and Mrs. Ruthvens
UNITED STATES

DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

SUMMARY 38

April" May, and June, 1965

By

Howard A. Powers, Arnold T. Okamura,

Robert Y. Koyanagi, and Willie T. Kinoshita

Issued June 1966

OBSERVATORY STAFF

Geology

D. L. Peck

H. A. Powers (Scientist in charge)

Geophysics

D. P. Hill

W. T. Kinoshita

George Kojima

R. Y. Koyanagi

A. T. Okamura

Geochemistry

R. T. Ok&ffiura

T. L. Wright

Support

E. T. Endo

J., C. Forbes

w. H. Francis

Yukie Kimura

B. J. Loucks

Akira Yamamoto
Contents

Page

Summary of activities------------------------------------------------ 1

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

Seismic summary------------------------------~-----------------------1

Persons or agencies reporting "felt" earthquakes during the quarter-- 30

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

March 9 and June 11, 1965------------------------------- 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--------------------- 8

4. Local earthquakes recorded by seiS'mographs of the U.S.

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

5. Distant earthquakes--------------------------------------- 17
Summary of activities

Extreme quiet prevailed at Hawaii's volcanoes during the 3 months

following the MarCh '1965 eruption along the' upper ':east rift 'of Kilauea.

At no time did the total count of earthquakes reach 100 a day, and the

count of local'shal,low Kilauea quakes did not exceed 55 on any day.

Moderate reinflation of the summit is recorded by the mid-June

readings of the long-base tiltmeters. Monitoring daily from the shortbase tiltmeter in Uwekahuna vault shows 3 mic'roradians of rise to the

west (with no northe'rly component) between 'April 1 and the end of

May; during June there was a rise to the northwest of about 4 microradianso

Long-period small quakes made up about half of the:count of local Kilauea

caldera quakes during June.

Field studies on Alae lava lake now include releveling once a year

(done on May 11, 1965), and temperatuJ;e measurements at shorter intervals.

About the first of July the highest lava temperature was 725°C at 36 feet

below surface, where the lake is 50 feet deep.

At Makaopuhi lava lake a net of level stations was laid out 5 days

after the crust stabilized. Twenty days after st~bilization the average

subsidence was 3.4 feet; in the next half-month (to April 22) further

subsidence averaged 0.275 feet; in the next month, 0.18 feet, and in the

following month, 0.11 feet (on June 23, 1965). ;In the quarter AprilJune, crustal thickening and cooling was monitored by drilling through

the crust in 14 core holes; the first hole was'drilled on April 19

through 6 1/2 feet of crust. Sampling of gas f,rom drill holes was

started June 17-18 b,y a te~m" ,from the University of Hawaii, led by

Professor Naughton. '

1
.':; ,,' EXPLANATION

.wai~ ..

Honokaa 1000 0 ""-

-......."paauilo o

• Seismooraph Station

o' Town or locality

5

EHL:EH3::EH3:°=:=:::::E====:iIO::':=:::::J'r Miles .

5 ° 5 10 . 15 20 25 Kilometers BAH &==3 '

Contour int.rval 1,000 fMt

, Datum is mean sea Ie".' . TopoQrophy by US GMIo9iCOI Sw"e,

Laupoho. oe 20·

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

the text and seismograph stations operated by the U.S. Geological

Survey. 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 KiJauea 1S monitored daily by a ;short~base water-tube

tiltmeter in Uwekahuna Vault, and at irregular'intervals it is measured on

a regional scale by means of a network of field tilt··bases and a portable

water-tube tiltmeter. The attitude of the ground surface at each tilt- base

is reported in terms of north-south and east-west tilt coordinates~ Both

coordinates at each station were arbitrarily set equal to 500 when

measurements at that station were begun. Increasing tilt coordinates

correspond to northward and eastward tilting of the earth's surface; that

is, to a relative subsidence toward the north and east. A one-unit change

in coordinate corresponds to a tilting of 1 microradian ('1 mm per km) in

the direction indicated.

Location of and essential data on each tiltmeter station are listed

in table-7, which is published only in the first-quarter issue each year.

Table·l. --Tilt coordinates at Uwekahuna Vault, April, May, and June, 1965

Date N~ E-W Date N~ E~

(1965) (1965)

April 4 459 511 June 5 461 509

11 458 510 12 463 510

18 460 511 19 464 508

25 460 512 26 464 504 ~y 1 460 510

8 460 509

15 461 511

22 461 509

29 461 508

3
2nd Quarter, 1965

.. , . . .

Table 2. --Tilt coordinates and 'Change's a.t,'bfis'ef=f ~r6und 'Ki~auea caldera. . ., (See tilt; diagram,. figure 2,.)

, "

: "

(lO':~ i

Tilt Date Tilt coordinates ~te rad/mo) Date. of

base (1~65) N-S E-W , .and direc~ion of: last l

, .. .- ·tilting :since re·ading

last reading (1965) "

J

Uwekahuna June 15 466.4 494.8 8.0 -N.- 1.909° w. March 6

Tree Molds . . 9' 433.0 519.9 3.2 N. 36.1° w. 7

Sand Spit 16 874.7 734.1 2.3 s. 10.0° w. 8

Kalihipaa 8 334.9 380~4 1.6 No 75.2° w. 7 . ,

Keamoku 7 586.8 ,503.3 2.3 N. 75.9° w. 7

Ahua ~~mokukolau. .~ - .. 15 621.7 532.7 4.6 -N. 40.9° w. 6 !

Kipuka Nene ,8 484.0 505·3 .01 B.. 88.2° w. 9

Hilina Pali 9 502.0 493.2 . 7 N. 17.1° w. Dec. 7

(1964 )

Kapapa1a Ranch 7 493'.0 506.:2 · 32 IS. 61.1° Eo March 9

Mehana 16 539·0 '547.5 .8 s. 54.4° E. March 9

- . ' . : . . .

4
.......... Kea

Cl

o

....... Kal

Q

Kap

•

-KN

I----t

g TILTING RATE 2.5 X Iff' RADIANS I MONTH

-;:7;/' MAR 9. 196& - JUN II. 1965

o I I

..... 5KM

2000

Figure 2. --Tilting of the ground around Kilauea caldera, March 9-June 11,

1965. 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; essential

data pertaining to the stations are listed in table 6, which is published

only in the first-quarter issue each year.

7
Table --Number of earthquakes and minutes of tremor recorded on seismographs U, 

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 is 

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

Earthquake categories are: earthquakes from a source about 30 km beneath the Kilauea 

shallow earthquakes in the Kilauea caldera region; shallow earthquakes along the SW 

Kilauea and the adjacent portion of the Kaoiki fault system; earthquakes along the e

Kilauea's east rift zone--detected largely on the Pahoa seismograph; fro

east rift zone and the adjacent fault systems of Kilauea's south flank; and earthqua

regions: Kana, Mauna Kea,

Tremor Kilauea Kilauea Earthquakes

(in minutes) Summit caldera SWc rift Eastern Upper

Date Inter- and east east

(l965) Deep mediate Shallow 30 KM Shallow Kaoiki rift rift 

April 1 4 20 9 4' 1

2 3 25 8 2

3 3 35 8 5 1 Mauna

4 4 40 2 4

5 2 23 4 4 1 Mauna 

6 1 15 5 3

7 2 15 5 5

8 2 35 7 1

9 6 23 7 1 1 Mauna

10 3 2 31 12 3

11 17 2 40 4 2

12 2 40 6 4

13 4 49 6 4

14 3 50 4

15 1 48 3 5 1 off S

Hawa

16 6 20 9 1 .1 1 Hual
April 17 40 20

6 1 2 1 Mauna 

18 30

7

4 -------

19

7

2 32

5

2

20 20

5

2 -------

21

9 28

7

22

3 35 16

2

23

4 1 45

9 1 -------

24 1 53

6

4 1 Mauna 

25

3 55

4

8 -------

26

3 35 10

4 -------

27

3 45

5

5 1 Mauna 

28

6 30

7

4 ------

29 15 25

6

5

2 off S

1 Kon

30 32 25

4 10 ------

May 1 36 33

6

3 1 off S

2 1 30

9 ------

3

5

2 45

3

4 ------

4

5

2 45

5 13 1 off S

5 10 1 33

4

6 ------

6

5 22 12 1

7 37 1 30

6

5 ------

8 1 14 1 1 Maun

9

3 35

2 1 Kon

10

5 20

4 ------

11

5 35 11

4 1 Maun

12 46

3 26

6 11 1 Maun

13 1 22

6

7 ------

14

2

2 10 10

4

15

4

2 30 10

6 ------

16 25

3

3 1 Kana

17

3 20

8

4 ------

18 1 15

8

4 1 Maun

19

2 20

4 1

20

4

2 23

3

5 1 Maun

21

5

3 28

5 10 1 off E

22 15

7

7 1 Kon

23

6 30 II

8 ------
Table 3. of earthquakes and miJlutes of recorded on seismographs Uj 

WI', and 8Jround K:Llauea calclera--CoYltinued

Tremor· Kilauea .Kilauea Ear·th(lUake,s

'(in ) Summit rift Eastern Upper and .. ' Date east east

(1965) i Deep' me 1:ate Shallow 30 KM Shal19w, Kaoiki rift rift 

May 24 5 I" 25 9 6 1 Mauna 

r;' 1 Mauna

25. 3 23 8 11

26 ---- 2 36 7 8

27 .. 2 21 5 14 1 Mauna 

28 4 23 5 6

29 ;. ---- 6 27 5 10 1 Koria- 

30 .1 1 22 8 8

31 3 20 4 6 1 Mauna 

1 off 

June 1 5 25 3 1 5 2 Kana 

2 I. ---- 15 4 16 5 10

f-J 3 4 18 3 10 0

4 32 3 10

1 Huala

5 2 39 3 10 

6 3 23 3 1 13 

7 7 18 8 4 8' 50 2 20 8 10 -- - --.:

9 4· 18 2 10

10 5' 25 2 10 1 Mauna 11 4 18 -4 10 I

12 8 18 6 3

13 3 18 5' 14 

14 2 26 6 13 

15 1 45 5 6 1 Mauna 

16 32 1 35 2 5 1 off 

17 9 1 4i 3 3

18 2 70 2 3 1 Mauna

19 " 2 31 2 4 1

20 23 5 5 - -- - 

21 2 38 3 6

22 46 5 7

23 47 4 33 13 6
Jillle 24

8

2 38

3

4 1 off S

25 42

5

3

26 20

3 35

6

6

27

8

2 35

3 1 4 1 off w

28

9

3 36

2

4 -------

29

2 35 2 3 -------

30 30

5

8
Table 4.--Local earthquakes recorded by seismographs of the DeS. Geological Su

April, and June 1965

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 favor

smaller ones) are included in the list.

Date Time Epicenter 

(1965) h m s }..K'--gni _ Depth 

- - tude (km) Lat. 1\1 • Longo w. Description

April 1 14 01 3·5 5 19°16 i 156°07 i 28 km SW. of Hookena

n

c::.. 02 43 19·,2 15)+° 51. 2 i 12 km SE. of Pahoa'

3 03 07 2,,2 8 19°17f3 T 9 km of Makaopuhi

3 ./ 23 26,,0 13 16 knl ESElJ of Kamuela

16 44e3 8 19°o8c2 T 155 0 5 21 .5' 10 km I'JE of Naaleh'u

6 01 21 47e8 2f4 9 19°17( 5' 10 km of Makaopuhi

seismometer')

9 10 19 1803 8 19°1707 Y 155°41.8 Y 10 km of PUll 0

Keokeo"

10 02 57 30 19°2801' 155 0 15£. 7' Beneath. Ki.la,uea surnmit

10 05 48 3 35 Fe

10 05 50 20.4 2l"2 27c' 5

10 06 09 18,,1 >:3.0 25 19°2105' 155°1ge3' Fe

10 15 34 38£0 2 9 Kaoiki fault system

11 20 38 26e4 6 50 19°15' 154°43' 36 km of Pahoa

12 . 19 27 31e2 6 ' 155°30r2' Kaoiki fault system

13 05 22 1380 9 19° 16c.9! 155°15c3' 10 km cLJ e of ,·Ahua ;

seismometer..

15' 16' 29' 21,,1 30 . 19° 010"'0 t 155°16p.0' 33 km ESE" of Naalehu

16 00 54 40.2 40 19° i 155° 5105'- 10 km NNWe of Waawaa

16 10' 30 i: 5 8, 155°28Q5! Kaoiki fal11t system

16 16 17 27e9 30 - 19°2106 i Beneath Kilauea summit Fe
April 17 01 32 52c7 2.0 30 19°22(,8' 155°18.9' Beneath Kilauea summit

17 17 45 57cO 200 45 19°12e2' 155°08.8'

8 km SEa of Apua Point

17 18 39 24&6 2.4

8 19°5009' 155°31.5' 11 km Ne of Pahakuloa

18 07 24 200

8 19°26.7' Kaoiki fault system

18 19 55 20.6 209

8 19°2402' ---do----------------- Fe

18 20 47 200 6.5 19°24.0' 155°25.;4.' ---do-----------------

20 04 18 0800 2.3 40 19°15113' 155°13.7'

4 km WSWo of Apua Point

20 16 54 03.3 202 605 19°1702' 155°1403' 11 km SWE' of Makaopuhi

seismometer"

20 16 55, 57.7 2.2 605 -19° 17. 2' 155°14.3' 11 km SWc of Makaopuhi

seismometer"

21 15 35 32.1 2.4

8 19°3000' 155°01.0'

8 km Wo of Pahoa --

23 02 02 52pO

8 19° 17e. 0' 155°10.5'

9 km So of Makaopuhi

seismometero

2J. Oy. 10 39·7 2eO 30 . 19°1503' 155°2202' 10 km SSE" of Desert

seismometer"

23 05 '01 21.. 3 203

9 19°16e3' 155°0807' 11 km SSE. of Makaopuhi

(-I

seismometer..

LA.> 24 10 17 28.7 2.6

5 19°11.2' 155°40.7' 17 km NWc of Naalehu

25 10 28 205

3 19° 0' 154°45,,0'

7 km ENEo of Cape

Kumukahic

26 18 54', 21,,8 201

9 19°22.8' 155°2309' Kaoiki fault system

2-7- 23 18 1400 3el 10 19°31G5' 155°36,,5'

5 km NWc of North Bay

seismometero

29 04 ,19_ 2502 203 25 19°22e9' Beneath Kilauea summit

29 10 08 3001 400 13 20° 35' 157°14' 44 km So of Lanai City, 

Lanai 0

29 17 22 2902 4$0 13 20° 35' 157°14 i 44 km So of Lanai

Lanai 0

29 10 38 5709 3QO 4205 19°51,,7'

8 km We of Kiholo Bay

May 1 07 14 205 40 18°5505' 155°1205' 43 km ESE" of Naalehu

3 15 26 o6 Q 6 f) 35 19°2304' 155°1706' Beneath Kilauea summit c-e"l

4 05 26 202 2'785 19° 1305 1 13 km SSWo of Desert

seismometero

4 09 41 32 Q 6 2-e 8 13 19°16' 156° 68 km of Kealakekua .,.. .

6 19 01 202 35 19°22.0' 155°14w3' Beneath Kilauea summit c=.- IlI
Table 4.--Loca1 earthquakes recorded by seismographs of the U.S. Geological Surv

April, May, and June 1965--Continued

Epicl nter

m s Long. W. Description

Time Magni - Depth

tude (km) Lat. N.

Date

(1965) h

19°19.8' 155°44.7'19°22.5' 155°25.0'

19°52.1' 155°36.0'

19° 24. 3 1 ,155° 30. 7 f

May 7 00 19 44.2 2.3

7 00 47 34.7 2.0

8 14 51 48.7 2.8

9 21 42 12.5 2.4

10 21 02 32.5 2.6

11 02 52 16.0 2.511 13 17 32.2 2.3

12 02 58 13.4, 2.1

12 03 ·55 13.9[ 2.7

12 05 24 49.1 2e2

12 ·16 10 31.0 2.2

13 07 34 1380 2.2

13 10 46 22.7 2.3

16 04 27 30.7: 3.5

16 09 09 4204 3.5

16 17 21 39.7 2.0

18 07 22 '30.0 3.2

19 22 02 59.7 - 2.2

20 07 37 00.8 2.5

20 13 40 59.3 2.7

21 09 18 27.1 3.0

22 17 13 37.5 2.7

24 01 28 08.0 3.3

24 08 06 44.4 205

24 09 06,11.0 2.3

8

30

13

3

30

13

30

8

13

30

30

10

30

8

8

30

4

30

8

40

13

<3

8

<3

5

19°25.8'19°11.6'20°04.4'19°35.2'19°23.3'

19°56.7'19°20.1'

19° 18.,8'

20°02.3'19°21.8'

19°22.9'

19°15.1'19°16.6'19°43.2'

19°20.2'

19°20.1'

19°33.0'19°22.9'19°09.7'

20°40'

155°28.8'

155°26.1'

155°20.5'

155°56.9'155°18.9'

155°15.3'155°17.7'155°01.7 '155°19·5'

155°19$2'

155°18.3'

155°11.9'

155°2301'

156°02.3'

155°,26.7'

155°17.7'

155°37.0'

155°17.3'155°34.5'

155°09.4'

155°38'

Kaoiki fault system

5 km ESE. of Pahala

5 km NE. of Paauilo

9 km NNW. of Kealakekua

Beneath Kilauea summit

6 km ssw. of Laupahoehoe

Beneath Kilauea summit

18 km ESE. of Makaopuhi

seismometer.

6 km E. of Paauilo

Beneath Kilauea summit

1 km SW. of Apua Point

7 km S. of Desert

seismomete'r.

10 km NWo of Kailua

Kaoiki fault system

Beneath Kilauea summit

8 km NW. of North Bay

seismometer.

Beneath Kilauea summit

11 km NNE. of Naalehu

5 km of Apua Point

64 km ESE, of Haleakala

seismometer.

18 km ESEE of Hookena

Kaoiki fault system

6 km E. of Waikii

17 km SW. of Mauna. Loa

seismometer"

F

F

Fe
--+

May 24 20 17 26.4 3.6 10 19°23.5' -155°24_.6' Kaoiki fault system F

27 03 53 47.0 2.3 10 19° 53.-5' 155°28.7' 16 km wsw. of Keanako1u -

27 21 20 19.6 2.2 6.5 19°18.1' 155°10.2'

7 km SSE. of Makaopuhi

seismometer.

29 09 46 42.9 2.2 13 19°23.2' 155°46.3' 14 km E. of Hookena -

30 03 00 27.1 25 19°22.8' 155° 18. 2' Beneath Kilauea summit F

30 04 .. 29 12.6 2.5 27.5 19°22.9-' 155°16.9' ---do------------------

30 04 35 07;5 27.5 19°23.9' 155°16.0' ---do------------------31 00 27 03.2 2.0

8 19°51.8' 154°54.9' 25 km NE. of Hila

31 11 36- 11.2 3.4 3 19°13.2' 155°39·7' 19 km NW. of Naalehu -

June 1 18 10 10.5 2.3 <3 19°25.8' 155° 46. 5' 18 km SED of Kealakekua

1 21 48 54.0 2.4 3 19°19.0' 155°45.9' 17 kIn SED of Hookena -

2 04 47 18.2 2.0 30 19°21.5' Beneath Kilauea summit

4- 02 34 06.8 2.3 30 19°22.8' 155°18.6' Beneath Kilauea summit -

4 02 39 48.4 3.1 40 19°23.4' 155°16.6' ---do------------------ F

t-J 

\Jl

4 04 25 38.9 2.6

5 19°30.1' 155°48.8' 11 km ESE. of Kealakekua -

4 17 48 55.4 2.5 <3 19°52.4' 155°49.7' 11 km NNEt of Puu Waawaa -

5 18 13

7 2.2 30 19°22.8' 155°18.6' Beneath Kilauea summit -

7 04 39 59·0 2.4 35 19°22.8' _155° 18. 6' ---do-------------------7 15 40 43.-8 3.5 25 19°22.6' 155°19.4' Beneath Kilauea summit F

9 19 -: 18 55·0 2.7 6.5 19°22.7' 155°25.7' Kaoiki fault system -

10 03 36 34.5 2.3 30.· 19°23.5' 155°18.7' Beneath Kilauea summit -

-3:0 11 22 42.1 2.3

8 19°47.1' 155°34.8'

7 km WNW. of Pohaku1oa -

11 00 54 . 13.9 2.1 -10 19°16.1' 155°14.1' 12 km SSE .. of Ahua -

seismometer.

11 11 - 29 2.6 1.5 19°28.2' 155°45.2' 18 km of Kealakekua -11 '17 38 14.9 2.9 10 19°19.0' 155°13.4'

7 km SW. of Makaopuhi

seismometer.

14 03 46 40.4 2.3 10 19°20.3' 155°04.0' 12 km ESE. of Makaopuhi -

seismometer.

15 10 28 59·0 2.8 3 19°52.8' 155°41e6'

5 km NW. of Waikii -

15 23 08 04.7 2.3

8 19°12.1' 155°30.. 7'

4 km W. of Pahala -

16 00 28 30·5 -2.4

8 19°11.0' 155°30c7'

4 km SW. of Pahala -
irable 4,. -Local e8"rthqllakes recorded by seismograp11s of the lJ. S Ci-eological Su

April) Yay J and Jlme 1965--Conti.nu.ed

Time Epicenter ,. Date Magni- Depth .

1"

(1965) 11 m· s tude (km) 1\J • Lang., w. DeBcription 

- - - ,"

J

June 16 03 57 14p6 2·3 42.5 7", 1550 9' 17 'krn of Makaopuhi -

seismometer..

16 13 10 24.9 2.0 10 18°54a5 ' km SE. of ; -16 13 37· 39.1 <3 i9°13.5 ' I .1.55 28.5. r.;... km N. of Pahctld I .

18 19 16 34.1 10 19° 1+8. 6 f ' 1550 43.3.' 10 km SW. of Waikii 

19 02 43 08.7 3 19°39.7 ' 155° 56. o.t 7 km E.NE. of Kailua -19 13 29 2., 8 19° 17 8 t . 1550 14.6.' 9 km SSE. of Abua !,

seismometer,.

23 13 21 44.9 6.5' 19°24.4 t 155°26.5.,' Kaoiki fa,·u.lt ;j -

23 .15- 48 32.8 2.8 8 19°23.1.' 155°26.4' ---do------------------ ] -

24 15 32 27.7 2.3 40 19°11.7 ' 155°06.6;t 11 km SEe of Apua IJoint -

24 21' 18 -- 05.6 2.3 8 18°55.7', 1550 13. 41 km ESE. of Naaleh\l I -

25 17 01 38.3 2«2 10 19° 1.6" 8 t _ 15,5°05.9' 13 km SEa of Makaopuhi : -

seismometer.

I

27 23 43 3.3 13 31' 63 km of Kea,lakekua : -

,

30 23 18 ,30.5' 2.1 9 19°19.7' 10 _:km ESE. of Makaopuhi -

seismometer.

'1

'

.

-:.. -
Table 5.--Distant e~rthquakes

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, Summary 370 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 U. S. Coast and Geodet"ic Surv'~y.

April 4, 1965 April 5

C&GS card 037-65:

20:09:41.1

8.8° S., 74.5° w.

Peru-Brazil border region

h about 143 km

Magnitude 5.3 (CGS).

C&GS card 037-65:

13:30:37.8

51.9° N., 175.2° E.

Rat Islands, Aleutian Islands

h about 40 km

Magnitude 6 (Pas)

5.4 ,(Brk)

6~6. 25 (Pal)

5.7 (eGs)

5.5 (RYO).

April 4

April 8

er 06:48:43

Tmax 07: 35: 44

PEZ

Z

Pa Z iP 12:58:43.8 d

Na Z iP 39.3 d

Hi Z iP 45.6 d

NB Z iP 42.4 d

Ke Z iP 40.9 d

C&GS card 038-65:

12:51:27.8

17.6° B., 178.7° w.

Fiji Islands region

C&GS card 038-65:

13:52:13.4

44.6° N., 151.1° E.

Kurile Islands region

h about 81 km

Magnitude 5 ABrk), 5· 5-5.75 (Pal),

5.(7 (CGB), 5. 5 (HVO).

April 5

M Z eP 14:01:07.7 c

MP Z eP 09.6 c

Hi Z iP 08.5 c

NB Z eP 07.1 c

U PEE eG 14:13:15

U PEZ eR 14:15:03

C&GS card 040-65:

06:21:34.2

3.2° B., 148.4° E.

Bismarck Sea

h about 10 km

Magnitude 5.0 (CGS).

U

Ke

1.7

20:21:58.3 c

59.5 c

20:22:03.0 c

13:38:08.5 d

09.5 d

09.6 d

09.1 d

10.5 d

07.5 d

07.8 d

05.9 d

13:48:31

14:20:46

43

31

28

00

eP

iP

eP

iP

iP

iP

iP

iP

eP

eP

eP

eR

Tmax

Tmax

Tmax

Tmax

Tmax

z

z

z

z

z

z

z

z

z

z

Z

PEZ

Z

Z

Z

Z

Z

Pa

Hi

Ke

M

A

D

U

Pa

Hi

NB

Ke

U

M

A

U

Pa

Hi
Tab1~ ,5" ---Distant earthquake~--Continued

April 8, 1965--Conti~ued April 10-~Cohtinued

C&GS card' 038-65--'continued

h about 575 km :,

Magnitude 5025-,5Q5 (Br~),

5.2 (CGS}o

April 8

, Hi

NB

Ke

Ha

U

U

Z iP

Z tP

Z iP

Z eP

PEN' eS

PEZ eBS

0(08 d

0402 d

0109 d

, 0901 d

'22':46 02

22:49:42

C&GS card 043-65:

10:45:2904

3206° S~, 178.3° We

South of'Kermadec Islands

h about 52 km

Magnitude 501 (CGB)o

C&GS card 039-65:

13:43:5208

5202° N., l73v5° E~

Near Islands, Aleutian Islands

Felt on Shemya

Magnitude 5075 (Pas), 6 (Pal),

5. 4 (CGS) " 5u 6' (.~o) u

April 9

April 9

M Z iP 23 :00 :420 2 d·

A Z eP 4207 d

MP Z eP 4303 d

U Z --eP 4206 d

Pa Z eP 4405 d

Na Z iP 3909 d

NB Z iP 4102 d

Ha Z eP 4409 d

C&GS card 040-65:

22:32:4606

1708° So, 1(8~8° Wo

Fiji Islands region

h about 543 km

l\1agnitude 6 ,(Pas), 505~5o75 (Brk)~

50 9 (CGS)'o

April 10

C&GS card 040-65:

22:53:0408

1304° So, .17003° ED

New Hebrides Is1a~ds region

h about 644 km

Magnitude 6.2 (eGs).

13:51:4381 d

13:57:54

14:02:22

11:03:04

"11:11:30

Z iP

PEN eS

PEZ iR

,PEN eS

,PEZ eR

NB

U

U

u

u

u PEZ eR, 23:26:20 April 11

C&GS card 042-65:

22:52:2403

4e2° S., 13401° Eo

West New Guinea region

h about 33 km

Magnitude 506 (CGS).

M Z iP 00:22:1108 c

MP Z eP 1103 c

U Z iP 1103'c

Hi Z eP 1303 c

NB Z eP 11.1 c

Ke Z iP 1002 c

April 10

~,1 Z iP 22:40:05.1 d

A Z eP 04.8 d

u Z eP 04:.9 d,

Pa Z eP 060( d

Na Z eP Ol.O'd

is

C&GS card 039-65:

00:11:0808

4207° So, 173.9° E~

South Island, New Zeaiand

h about ( km

Magnitude 60~ {CGS,) 0

I
Table 5.--Distant earth~uakes--Continued

April 11, 1965 April 12--Continued

M

A

D

:MP

Pa

Na

Hi

Ke

Ha

z

z

z

z

z

z

z

z

z

iP

eP

eP

eP

iP

eP

eP

iP

eP

18:59:55.0 c

54.5 c

53.9 c

54.'7 c

56.6 c

51.7 c

58.0 c

53.0 c

19:00:00.4 c

C&GS card 039-65

20:41:16.3

30.2° N., 138.5° E.

South of Honshu, Japan

h about 421 km

Magnitude 5.75~6 (Brk)

5.8 (CGS).

April 16

C&GS card 040-65:

18:51:38.1

26.2° S., 1'78.5° E.

South of Fiji Islands

h about 581 km

Magnitude 5.6 (CGS).

·C&GS card 040-65:

03~59:40.2

56.6° N., 152.7° w.

Kodiak Island region

h about 33 km

Magnitude 5.3 {CGS).

April 12

April 12."

06:47:59

07:14:31

33

43

37

36

18

02

49

12

23:30:39.0 c

39.7 c

40.0 c

39.7 c

39.7 c

38.2 c

42.7 c

36.8 c

38.7 c

29.4 c

23:37:36

23:40:52

PEZ eR

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z eP

Z eP

Z eP

Z eP

Z eP

Z eP

Z iP

Z eP

Z iP

Z eP

PEE eS

PEE eG

April 18

U

M

A

D

MP

U

Pa

Hi

NB

Ha

C&GS card 040-65:

23:22:18.6

64.7° N., 160.1° W.

Central Alas-ka

Felt at Norton Sound vicinity

h about 5 km

Magnitude 5.75-6 (Pas), 5.75-6

l (Brk), 5.81 {CGs),

6.0 (HVO).

M

A

D

:MP

U

Pa

Na

Hi

Ke

Ha

U

U

20:50:44.5 c

45.5 c

44.9 c

45.9 c

45.2 c

44.4 c

45.6 c

43.7 c

36.2 c

iP

eP

iP

eP

eP

i.P

iP

iP

iP

Tmax 04:46:02

Tmax 04:46:06

Tmax 04 :45 : 56

Tmax 04:46:07

Tmax 04:46:07

Tmax 64:46:07

Tmax 04:45:42

Tmax 04:45:38

Tmax 04:44:31

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

z

M

A

D

:MP

U

Na

Hi

NB

Ha

M

A

D

:MP

U

Pa

Hi

NB

Ha

19
Table 5" --Distant eartb.quakes--Continued

April 18, 1965--Continued April 20

C&GS card 042-65=

o6~50~1706

5406° No 16104° Eo

Near east coast of Kamchatka

11 about 33 km

Magnitude 503 (CGS)o

C&GS card 045-65~

06:33=5808

4105° No~ 12701° WQ

Off coast of northern Ca1ifo

h about 20 km

Magnitude 6 (Brk), 5.75-6 (~al)j

·50 6 {~CG$) 0

WP Z iP

April 18 April 22

M

U

Z iF'

PEZ eR

09:58~20e9 c

10:37:19 u PEZ eR

C&GS card 04o-65~

09:39:18.7

5908° SQ' 26.8° Wo

South Sandwich Islands region

h about 29 km

~~gnitude 505 (Brk), 509 (CGS)~

April 18

C&GS card 042-65:

18~36:0102

5108° No, 17601° Eo

Rat Islands, Aleutian Islands

h about 37 km

Magnitude 405 (Brk)~ 501 (CGS)o

April 24

u PEZ eR 13:40:39 M

U

Z eP

PEZ eR.

22:05:4607 d

22~23:38

C&GS card 044-65:

12:41:54c9

59~7° So, 2604° Wo

South Sandwich Islands region

:Q. about 25 km'

Magnitude 6 (Pal), 5~ 8 (CGS) 0

April 19.'

M Z iP 23:52:1304 c

D Z eP 1309 c

MP Z iP 15.3 c

Na Z eP 14.0 c

Hi Z iP 1500 c

NB Z eP 1108 c

Ke Z iP 1004 c

Ha Z eP 04.7 c

U PEZ eR 00:09:20

C&GS card 039-65:

23:41:5808

34,,9° No, 13800° Eo

Near south coast of Honshu, Japan

h about 36 km

Magnitude 506 (CGs), 5.9 (HVO).

20

C&GS card 042-65=

21: 55·:2605

1104° No, 14001° Eo

West Caroline Islands

h about 59 km

Magnitude 50 7 (CG·S·)"

April 25

M Z iP 01:10:00,,2 c

D Z iP 0002 c

NB Z eP 01:09:58,,2 c

U PEZ eR 01:27:1709 .

C&GS card 041-65~

01: 00 ~,llo 6

2405° No, 142~7° Eo

Volcano Islands region

h about 15 km

Magnitude 5075-6 (Pas)~ 5,,6 .(-CG-·S)0
Table 6. --Dis.tant earthquakes--Continued

C&GS card 041-65:

01:57:14.4

58.9° N., 142 ..7° W.

Gulf of Alaska

h about 33 km

Magnitude 5.3 (CGS).

April 26, 1965

M z iP 02:04:52.1 c

A Z eP 52.5 c

D Z iP 53.1 c

Ke Z eP 52.5 c

M Z ePP 02:06:35.6 d

NB Z ePP 36.3 d

C&GS card 044-65:

09:47:25.1

1.7° S., 126.6° E.

Molucca Sea

h about 15 km

Magnitude 5.75-6 -(Pal),

5. 7 (CGS), 5. 8 .{HVO).

April 26

11:06:24.2 d

24.2 d

22:27:39.9 c

39.9 c

38.2 c

22:38:07

22:51:13

eP

eP

Z

Z

Z iP

Z iP

Z eP

PEE eS

PEZ eR

April 29

C&GS card 043-65:

10:54:28.0

7.0° S., 129.5° E.

Banda Sea

h about 67 km

Magnitude 5.9 (CGS).

April 27

M

A

C&GS card 042-65:

22:15:42.5

21.1° N., 120.7° E.

Taiwan region

h about 33 km

Magnitude 5.9 (CGS), 6.0 (HVO).

April 26

M

D

NB

U

U

09:59:34

10:23:59

Z eP

PEZ eR

M

U

C&GS card 049-65:

11:28:19.1

32.5° S., 179.1° W.

South of Kermadec Islands

h about 64 km

Magnitude 5.0 (CGS).

C&GS card 043-65:

11:19:25.6

15.3° N., 145.6° E.

Mariana Islands

h about 134 km

Magnitude 5. 2 /(CGS).

April 29

April 26

M Z iP 20:36:09.4 c

U PEZ is 20:41:37

U PEZ iR 20:45:01

M Z Tmax 21:13:21

A Z Tmax 35

D Z Tmax 35

MP Z Tmax 28

U Z Tmax 38

Pa Z Tmax 19

Hi Z Tmax 21:12: 52

NB Z Tmax 21:13:42

Ha Z Tmax 21:11:34

C&GS card 041-65:

20:29:07.4

54.5° N., 162.6° W.

Alaska Peninsula

h about 53 km

Magnitude 5.9 (eGs).

M

A

D

M

A

z

z

z

z

z

iF

eP

eP

eP

eP

11:28:54.5 d

55.2 d

54.2 d

11:37:56.2 d

55.3 d

21
Taole 5& --Distant' earthquakes--Continued

May 1

M Z iP 21~35:39c 9 c

A Z iP 4003 c

D Z iP 40,,9 c

Ke Z eP 39.8 c

C&GS card 042-65:

21:27:54.4

60~4° N., 14600° Wo

Southern Alaska

h about 33 km

Magnitude 5.3 (CGS)o

C&GS card 044-65:

10:01:3502

13.5° N., 8903° WG

El Salvador

125 killed; 400 injured;

4,000 homes wrecked in San Salvador

Cisneros district, San Marcos and

Santo Tomas.

h about 23 km

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

5.1 (CGS).

May 3

u PEZ eR 10:30:37

C&GS card 044-65::

15~28~43.3

47e4° N., 122.4° W~

Washington, two killed~ some

injured, moderate property

damage in Seattle area, felt in

Oregon, Idaho, Montana,

British Columbia, and on

Vancouvero

h about 57 km

Magnitude 6&6 (Pas), 6.75-7 (Brk),

7&25 (Pal), ,6.5 (CGS),

6.6 (RVO).

April 29, 1965

M Z eP 15:36:03e2 d

A Z eP 03.7d

MP 'Z eP 03~4 c

U Z eP 03.2 d

Pa Z eP 01&6 d

Na Z iP 07.3 d

Hi Z iP 00.2 d

NB Z iP 04.'9 d

Ke Z iP 06.0 d

Ha Z iP 15:35:59.7 d

U PEZ ePP 15:37:41

U PEZ is 15:41:57

U PEZ iR 15:46:05

M Z Tmax 16:15:38

A Z Tmax 26

U Z'",' Tmax 34

NB Z Tmax 40

Ha Z Tmax 03

May 1

M

D

Z

Z

iP ;

eP

13:12:46.9 c

46.8 c

C&GS card 042-65:

,13~02:4405

1203° N., 143.7° E.

South of Mariana Islands

h about 5 km

Magnitude 501 (eGs.).

22
May 11, 1965

Table 5.--Distant earthquakes--Continued

May 13

C&GS card 044-65:

17:37:38.3

61.4° N~, 149.6° W.

Southern Alaska

Felt widely in the Anchorage area.

h about 58 km

Magnitude 5. 5 (CGS).

C&GS card 046-65:

19:23:16.6

33.2° N., 138.0° E.

Near south coast of Honshu, Japan.

h about 324 km

Magnitude 4.8 (CGS).

M

A

D

NB

Ke

z

z

z

z

z

iP

iP

iP

eP

iP

17:45:25.9 c

26.6 c

26.7 c

26.1 c

26. +c

M Z

A Z

Ke Z

iP

iP

iP

19:32:53.5 c

53.6 c

50.4 c

May 12

M Z iP 10:45:27.7 d

A Z iP 27.7 d

D Z iP 26.9 d

u Z iP 27.7 d

Na Z iP 25.4 d

Hi Z iP 29.5 d

Ka Z eP 26.0 d

Ke Z iP 24.6 d

Ha Z iP 24.6 d

C&GS card 046-65:

10:33:43.5

6.2°. S., 130.3° E.

Banda Sea

Felt at Darwin

h about 125 km

Magnitude 5.25-5.5 (Pal), 5.7 (CGS).

23
Table 5~--Distant earthquakes--Continued

May 16, 1965

M Z iP 11:47:4506 c

A Z iP 4508 c

:MP Z iP 4603 c

u Z iP 4507 c

Pa Z eP 4701 c

Hi Z iP 47'e 1 c

NB Z eP 4404 c

C&GS card 047-65:'

11:35;46.0

5s3° N~, 125.7° Eo

Mindanao, Pn~lippine Islands

h about 36

Magnitude 602 (CGS).

May 17

May 19

A Z eP 03~10~1406 d

D Z iP 13G7 d

MP Z eP 1409 d

U Z iP 1405 d

Pa Z eP 1505 d

Na' Z iP 1102 d

Hi Z iP 1606 d

NB Z iP 1300 d

C&GS card 049-65:

03:00:5900

902° Se, 15geO° Eo

Sol:omon Islands

Felt at Honiara

h about 50 km

Magnitude 506 (CGS)o

C&GS card 047-65

22~46:31.7

4307° No, 146s5° E.

Kurile Islands

h about 45 km

Magnitude 504 (eGG)o

M Z iP 17~31:1909 d

D Z iP 1907 d

u Z iP 2085 d

Na Z eP 1903 d

Hi Z iP 20e8 d

NB Z iP 19.0 d

u PEN is 17:41:07

U PEZ eSS 17:46:15

U PEN eG 17:51:03

U PEZ iR 17=55:07

C&GS card 047-65:

17:19~25·9

2205° No, 121.3° Eo

Taiwan region

Felt at Hong Kong

h about 21 km

Magnitude 605 (Pas), 5075-6 (Brk),

602 (CGS), 605 (HVO)o

May 18

C&GS card 049-65:

00:40:10.9

1407° So, 16704° Eo

New Hebrides Islands

Felt

h about 16 km

Magnitude 6075-7 (Pas)~

7 (Brk), 506 (eGs),

782 (HVO) 0 J

May 20

M Z iP 00, 49 :090 8 c

A Z iP 09,,4 c

D Z iP 08.5 c

MP Z iP 0909 c

u Z iP 0906 c

Pa Z iP 1101 c

Na Z iP 06'03 c

ni Z iP 1205 c

NB Z iP 0806 c

Ke Z iP 0608 c

u PEZ is OO~56:21

U PEZ iSS OO~59~57

U PEN iG 01~00~55

U FEZ iR 01:03:03

M Z Tma~ 01:42:32

A Z Tmax 28

Na Z Tmax 05

NB Z Tmax 37

Ke Z Tmax 16

Ha Z Tmax 38

22:55:5301 d

53~6 d

eP

eP

Z

Z

M

D

24
Table 5. --Distant earthquakes'--Continued

03:17:47.3 c

47.3 c

46.1 c

May 25

U PEZ iR 18:55:20

C&GS card 051-65:

18:34:28.4

17.0° S., 175~9° E.

Fiji Islands region

h about 16 km

Magnitude 5.2 (CGS).

May 26

M ZiP' 20:03:02.7 c

NB Z iP , 02. 2 c

C&GS card 053-65:

19:44:10.9·

56.1° S., 27.6° W.

South Sandwich Islands region

h about 120 km

Magnitude 6.7 (CGS).

May 29

U PEZ eR 16:11:04

C&GS card 051-~5:

15:36:31.9'

57.8° s., 147.3° W.

South Pacific Cordillera

h about 33 km

Magnitude 5.5 (CGS).

C&GS card 048-65:--Continued

23:21:10.6

13.0° N., 124.5° E.

Sama~ Philippine Islands

h about 33 km .

Magnitude 5.75-6 (Pal), 6.0 (HVO),

5.9 (CGS). May 25

U PEN eS 13:2l:02

U PEZ iR ~3:25:00

C&GS card 048-65:

13:07:49.7

51.3° N., 178.79 E.

Rat Islands, Aleutian Islands

h about 40 km

Magnitude 5 (Brk), 5.75-6 (Pal),

5.5 (CGS), 5.5 (HVO).

May 24

A z iP 23:33:10.3 c

D Z eP 10.2 c

1v1P Z iP 11.1 c

U Z eP 10.5 c

Pa Z eP 12.3 c

Hi Z iP 12.5 c

NB Z eP 08.2 c

Ke Z iP? 07.6 c

Ha Z eP 05.7 c

U PEE eS 23:43:16

U PEZ eR 23:56:08 25

May 22, 19 5

M Z iP

A Z eP

NB Z iP

C&GS card 049-65:

03:05:43.6

1.3° N., 126.3° E.

Mo1ucca Passage

h about 25 km

Magnitude 5.5 (CGS).

May 22

M Z iP 10:39:15.9 d

Ke Z iP 13.9 d

U PEZ eS 10:45:23

C&GS card 049-65:

10:31:39.5

21.1° S., 178.7° W.

Fiji Islands region

h about 578 km

Magnitude 6.75-7 (Brk), 5.8 (CGS).

May 23

M Z iP 23:53:49.5 c

D Z eP 50.1 c

U Z eP 50.0 c

Pa Z eP 50.5 c

Hi Z eP 48.8 c

NB Z iP 48.6 c

U PEZ eS 23:59:56

U PEE eG 00:02:35

U PEZ iR 00:04:35

Ha Z Tmax 00:33:58

C&GS card 047-65:

23:46:12.0

52.2° N., 175.0° E.

Near Islands, Aleutian Islands

h about 22 km

Magnitude 6 (Pas), 6.1 (eGs),

5.8 (HVO).
Table 58 --Distant eartnquakes~-Continued . .. : 0-.. f. i.

June 2

05:48:55

53

53

40

27

57

33

03:42:5602 c

5700 c

5409 c

03~50~21

03:55=27

03: 57,: 37

'15:35:5705c

5700 c

57ul c

5806 c

5907 c

5508 c

iP 15~28~4305 d

eP 4308 d

iP· 15:05~4809 d

eP 48u5 d

iP 4805 d

iP 4904 d

iP 5100 d

iP 4701 d

iP 4604 d

Z

Z

Z

Z

Z

Z

Z

Z

Z

June 10

M

A

M Z eP

D Z eP

NB Z eP

U PEE.. is

U PEN iG

U PEZ i,R

C&GS card 052-65:

03 :33 :440' 9

4407° No, 14807° Eo

Kurile Islands

h about 47 km

Magni,tude 60 75 (~as), 605 (Brk)

600 (eGG), 6.. 5 (H\TO) 0

~1

A

U

Pa

Hi

NB

Ke

C&GS card 050-65:

14:58:31c9

1800° So, 17904° Wo

Fiji Islands region

h about 621 'km

Magnitude 40 5 -(Brk) '5 1 (CGB) 0

June 4

C&GS card 054-65:

15:16~5005

1.9° No, 12606° Eo

Molucca Passage

h about 106 km "

Magnitude 50 0 (CGG) 0

June 11

M Z iP

A Z iP

MP Z iP

Pa Z eP

.Hi Z eP

Ke Z iP

C&GS card 052-65~

15:26;5407

29u9° S.. , 17808° Wo

Kermadec Islands region

h about 225 km

Magnitude 503 (CGS)o

26

14:53:10.7 d

1302 d

080'4 d

1408 d

1004 d,

10.. 1 d

May 31, 1965··

M Z Tmax

A Z Tmax

U Z Tmax

Pa Z Tmax

Hi Z Tmax

NB Z Tmax

Ha Z Tmax

C&GS card 052-65~

05~07:4304

4401° No, 128.8° Wo

Off coast of Oregon'

h about 33 km

Magnitude 5.. 5 (CGS) .. :

May 31

WP Z eP ~11:50:3605 d

U PEZ eR 12:14:37

C&GS card 050-65:

11~38:28oo

705° S.. 128.7° Eo

Banda Sea

h about 37 km

Magnitude 6.. 0 (CGS).

June 2

M Z iP 05:20:5805 d

A Z eP 58.2 d

MP Z iP 58.3 d

U Z iP 5802 d

Ke ,z iP 5602 d

NB Z iP 57~5

Hi Z iP 05:21:00.2 d

C&GS card 050-65:

05:12:5901

2305° So, 18000° Eo

South of Fiji 'Islands

h about 539 km '

Magnitude 505 (Brk), 5G6 {cas).

Z eP

Pa Z eP

Na Z iP

Hi Z eP

NB Z iP

Ke Z iP

C&GS card 050-65:

14:45:55.. 8

l7u9° So, 179.. 5° w.

Fiji Islands region

h about 637 km

Magnitude 501 (CGS) ..
June 13, 1965

Table 5. --Distant earthquakes--Continued

June 15

C&GS card 053-65:

07:06:13.6

41.9° N., 143.4° E.

Hokaaido, Japan region

h about 32 km

Magnitude 6-6.25 (Brk),

6 {Pal), 5.7 (CGS),

6. i (HVO). .

C&GS card 054-65:

09:20:29.8

37.9° S., 177.5° E.

Off east coast of North

Island, New Zealand.

Felt from Bay of Flenty to

Wellington.

h about 58 km

Magnitude 5.25 (Pal), 6.2 (eGs).

u

u

PEZ eS

PEZ eR

07:24:05

07:31:37

A Z eP 09:30:46.6 c

June 14 June 15

C&GS card 054-65:

09:40:09.5

44.6° N., 129.5° w.

Off coast of Oregon

h about 33 km

Magnitude 5.5-5.75 (Pal),

5.2 (CGS).

June 14

C&GS card 056-65:

23:10:25.2

20.9° S., 173.7° E.

New Hebrides Islands region

h about 22 km

Magnitude 6, (Brk), ,6.25 {Pas),

6.5 {Pal), 5.7 (eGs),

6.0 (HVO).

Pa

NB

Ha

Z

Z

Z

Tmax

Tmax

Tmax

10:20:48

51

28

u

u

u

u

PEZ

PEN"

PEZ

PEZ

eP

is

eBB

iR

23:19:35

23:26:37

23:30:07

23:33:47

C&GS card 054-65:

13:05:54.0

44.5° N., 129.4° w.

Off coast of Oregon

h about 33 km

Magnitude 5.0 (CGS).

June 14

Tmax ..13 :46 :49

Tmax 13:47:05

Tmax 13:46:06

Pa

NB

Ha

Pa

NB

Ha

z

Z

Z

Z

Z

Z

Tmax

Tmax

Tmax

15:16:33

51

06

June 17

M Z eP 11:01:25.8 d

A Z eP 25.1 d

MP Z eP 25.3 d

U Z eP 25.2 d

Ke Z iP 24.3 d

C&GS card 063-65:

10:51:37

33.9° s., 179.5° w. .South of Kermadec Islands

h about 33·km

Magnitude 5. 3 coo ).

June 20

C&GS card 055-65:

18:04:35.7

4?8° N., 126.5° w.

No C&GS listing.

27

Pa Z Tmax 18:45:38
Table 5o--Distant earthquakes--Continued

C&GS card,058~65:

13:13:23~1

20090So, 173.2° E.

New Hebrides Islands region

h about 80 km

Magnitude 4.7 (CGS).

June 20--Continued

C&GS' card 055-65--Continued:

Off coast of Oregon

h about 33 km

Magnitude 5 (Brk), 5025-505

(Pal), 5.6 (cas).

June 22

13~09~57

51

55

44

44

49

21

48

13:08:12

Z Tmax

C&GS card 054-65~

11:09:15.3

5606° No, 15209° Wo

Kodiak Island region

h about 36 km '

Magnitude 6025-6o5'(Pas)~ 5~75

(Brk), 507 (CGS)~

6~.1 (HVO) v

June 23

M Z Tmax

A Z Tmax

D Z Tmax

MP Z Tmax

U Z Tmax

Pa Z Tmax.

Hi Z Tmax

NB Z Tmax

Ha Z Tmax

Ha

June 23--Continued

13: 36': 35

00:00:23.2 c

00:24:37

Z eP

PEZ eR

IT PEZ eR

J1ll1e 22-23

u

u

C&GS card 055~65:

23:48:07.1

7.10N., 123~5° E.

Mindanao, Philippine Islands

h about 60 km

Magnitu~e 5.6 (CGS).

C&GS card 054-65: '

12:23:22.2

56.6° No, 152.8° Wo

Kodiak Island region

h about 25 km

Magnitude 600 (CGS).

June 23 June 24

C&GS card 0$6-65:

14:08:31,,2

2306° s., 176.7° w.

South of Fiji Islands

h about 91 km

Magnitude 505 (CGS)o

C&GS card 055-65:

07:45:13.6

7.00No, 126.2° Eo

Mindanao, Philippine Islands

h about 50 km

Magnitude 6.0 (CGs).

June 24

z eP 14:17:2201 d

M , z

M

28

11:16:24.,8 d

25.7 d

2602 d

31.0 d

24.8 d

11:22:15

11:24:37

11:26:25

11:55~47

43

54

38

·36

40

11

33, ... ,'

iP

eP

eP

eP

eP

is

iG

iR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Z

Z

Z

Z

Z

PEZ

PEE

PEZ

Z

Z

Z

Z

Z

Z

Z

Z

M

A

D

Na

NB

U

U

U

M

A

D

MP

U

Pa

Hi

NB
Table 5.--Distant earthquakes--Continued

June 27, 1965

M Z Tmax 12:01:19

U Z Tmax 16

Pa Z Tmax 08

Hi Z Tmax 12:00:48

Ha Z Tmax 11:59:58

C&GS card 055-65:

11:08:55.9

60.3° N., 141.2° w.

Southeastern Alaska

h about 12 km

Magnitude 5 6Brk), 5.3 (CGS).

June 28

Na Z iP 03:43:12.1 c

Hi Z eP 17.1 c

NB Z eP 12.8 c

Ke Z iP 10.4 c

u PEZ eS 03: 51:29

U PEZ eSS 03:55:29

U PEZ eR 03:59:37

M Z Tmax 04:43:55

A Z Tmax 59

D Z Tmax 56

U Z Tmax 48

Ke Z Tmax 36

NB Z Tmax 04:44:05

C&GS card 057-65:

03:33:36.5

5.1° B., 153.0° E.

New Ireland region

h about 50 km

Magnitude 5.25-5.5 (Brk), 6.25-6.5 (Pal),

6.1 {CGS), 5.7 (HVO).

29
The following persons, or, agencies reported. "felt" earthquakes

during the 2nd quarter, 1965~ Their' as'sis'tance is gratefully acknowledged 0

Mauna Loa summit area

Mauna Loa Observatory

Kilauea summit area

Mr. Bo Loucks

Mro and Mrso Ho Wo Mist

Mrs 0 Mo Gorder

~1ro Go Yang

Mrs 0 Vo Hansen

Miss Mo English

Mrs 0 Ko Yamamoto

Mro C.. Wentworth

Mr. Jll Forbes

Kana

Mrso Johnston

Kau

Mrs 0 A.. Paiva

Hilo region

Mr" So Ho

Mrs. To Crabb

Mrs 0 H. Lewis

Mrs 0 Bo Shaffer

30
UNITED STATES

DEPART:MENT OF THE INTERIOR

GEOIOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATOBY

Summary 39

July, August, and September, 1965

By

Robert Y. Koyanagi, Arnold T. Okamura

and Willie T. Kinoshita

Issued October, 1966

OBSERVA'IDRY STAFF

Geology

H. A. Powers (Scientist in charge)

D. L. Peck

Geophysics

R. W. Decker (summer project)

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

Yukie Kimura

B. J. Loucks

Akira Yamamoto
Content s

Page

Summary of activities-------------------------------------~---- 1

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

Seismic summary - - - - - - - - - - - - - - -.- - - - - - - - - _. - - - - --- - - - --- - - - -.- - - --- 6

Persons or agencies reporting "felt" earthquakes during the

quarter------------------------------------------------------ 33

Illustrations

Figure 1. Map of the island of I-Iawaii showing seismograpll

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

2. Tilting of the ground around Kilauea cald.era between

June 11 and September 4., 1965----------------~·---- 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 seismographs of the

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

5. Distant earthquakes---------------------------------- 19
Summary of activities

The summer quarter of 1965 had very little seismic activity and

there was moderate swelling of the Kila~~a yolcaniq ediftc~. The

daily number of upper east rift quakes averaged about nine for the

three months; against this background the swarm of more than 500 quakes

that occurred. August 24-26 was conspicuous. Only once', S'eptember 4 and

5, were more than 100 shallow Kilauea quake'~ "'recorded in a 24-hour period.

Each of these two small seismic events coinci'ded in time with an

inconspicuous change from slight swelling"·to slight dec~ine in the pattern

of tilting that is read daily from the shoit';L.base t'ilt instrument in

Uwekahuna Vault.

Three rather consplcuoUS episodes of moderate swelling were recorded

by this same instrument, from July 1 tq August 3, from August 13 to the

18th, and from September 12 to the 30th, separated by slight relaxation or

ai.mless wanderingo 11he total swelling "amounts to about 25 microradians

(25 mm tilt in 1 km of di.stance·.) and the direction of the center of swelling

passes eastward through about the center of Kilauea. The pattern of swelling

given by the plotting of movement at .the long-base tiltmeter stations

suggests that this center of inflation ·is under the upper east rift rather

than under Kilauea caldera center (fig. 2).

In July, about 9 months after the liquid completely solidified in

Alae lake, the hottest temperature is 725°C measured at a depth of

36 feet in the drill hole where the l~ke was 48 feet thict.

Several new procedures were :used inL: .the stlidy of the perched liquid

lava in Makaopuhi Cra,ter erupted in 'early March 1965. Motoaki Sato

developed a device, in the Survey laboratories in Washington, to measure

the partial pressure of oxygen from a crystallizing silicate melt. Using

the device in Makaopuhi., profil'es plotting fugacity of 'oxygen through a

range of temperatures frqm 1,OOO°C to 555°C have been measured successfully,

and repeated several times, in a number of holes drilled in the crust of

the lava lakee

Samples of molten magma were collected through drill holes from as

deep as 8 feet below the l,070°C isothe*m marking the base of resistant

crust. By rapid handling, the liquid sample was water quenched to

clear glass tn which no crystalli~ation of "the opaque o~ides had started.

A direct measurement of the viscosity 'of the liquid basalt at

l,l20°C was made by R.eginald Okamura in d:r;.,i~l hole No. 20 through the

crust of ~£kaopuhi lake. The measurement was made using an instrument

developed by Herbert Ro Shaw and built by Burton Loucks in .the HVO shop.

The instrument consists of a foot-long, 4-bladed, stainless steel rotor,

securely coupled with a long steel shaft that is rotated by a system of

pulleys and weights which had been calibrated in hot tar of known viscosity.

1
EXPLANATION

25 Kilometers I

Datum is mean sea lellel

Contour interval 1,000 feet

• Seismograph Station

o Town or locality

5 0 5 10 15 20 A A A &=3 &='""'3

5EHCEHr:::E~i:::==:::i:====31O===::jlrhei...

WOi~

Honokaa

1000 D

TopoQroph, by US GeoloQical Surlley

-+- -+---\-_--I -+ ----=:!l"""":::::---"""";::O"'~~~LouPCihoe oe 20°

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

in the text and seismograph stations operated by the U.S.

Geological Survey. 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 ca1derao--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 att·itude of the grolilld 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" Increasj,ng

tilt coordinates correspond to northward and eastward tilti.ng of the

earth's surface; that is',' to a relative subsidence toward the north and

east. A one-unit change in coordinate corresponds to a tilting of

1 microradian (1 mm per km) in the direc~ion indicatedo

Location of and essential data on each tiltmeter station are

listed in table 7, which is published only in the first-quarter issue

each year~

Table lq --Tilt coordinates at Uwekahuna Vault, July, August,

and September, 1965

Date Date

(1965) N-8 E-W (1965) N -8 E-W

July 3 464 506 Aug. 21 470 491

10 465 509 28 470 493

17 466 504 Sept. 4 410 492

24 468 491 11 472 488

31 468 497 18 471 483

Aug. 7 468 497 25 473 480

14 469 494

3
3rd Quarter, 1965

Table 2o--Tilt coordinates and cnange.s at bases around Kilauea caldera 0

··.(See tilt diagram.9 figQ' 2., ) .

7

16'"

Not read this time

~epto 1 49205 50701 076 So 2903° Eo

Septa 9 536a 3~ 5'5005 056 So 4703°" E'o

Tilt base Date Tilt coordinates Rate (10...0 raa/me)

(location) (1965) N-S E-W and' direct:i."on' (jf Date of

tilting .since., las;t ~ea;ding

lastreading, .. (1965) , .~

, ,

Uwekahuna Septo 9 47904 48207 2~48 No 4300° Wu June 15

Tree Molds 'Sept'o 2 43609 ' 51701 ~68 ' No 3506° W'o 9

Sand Spit .Sept" 7 87104 . 72309 1056 'So 7206° .Wo 16,.,

Kalihipaa Aug 0 31 32808 37209 088 So 13.,5° Wo 8

Keamoku Aug 0 30 58905 49109 1068 No 7608° Wu 7

Ahua, Kamokukolau A~go 30 6~06o (5 52607 206 ; SO 24G7° WU 15

Kipuka Nene ~UgD 31 483Q5 "1,5050 ..3 ".08 So '12° Wo 8 . ,

Hil1na Pall

Kapapa..la Ra~ch

Mehana

4
cr

o

N

t

/ Kol

...--..

TILTING RATE 2.5 )( Ie!' RADIANS I MONTH

JUN II, 1965 - SEPT 4, 1965

o

Kop

\

2000

5 K M

Figure 2. --Tilting of the ground around Kilauea caldera, June 11-

September 4, 1965. 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 basesj

open circles, short-base water-tube tiltmeters.

5
Seismic summarYo--E~ents 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 sei.smograph), and distant earthquakes

originating more than 3,000 km from Hawaiio As an index of seismic

activity at Hawaiian volcanoes~ daily counts of earthquakes and m~nutes

of tremor recorded by seism.ographs 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)u Earthquakes of magnitude 200 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 5a

Location of and essential data on each seismograph station are

listed in table 6~ which is published only ,in the first-quarter issue

each yearo

.. ~,. :'

6
Table 3.--Numbers of earthquakes and minutes of tremor recorded on seismographs U, M, A, D

WP, and MP around Kilauea caldera.

Tremor is separated into three categories: deep, intermediate, and shallow, on the basis of re

on seismographs in the summit region. Unless otherwise stated, tremor is presumed to be asso

movement of magma within the central complex of Kilauea.

Earthquake categories are: earthquakes from a source about 30 km beneath the Kilauea summit re

earthquakes in the Kilauea caldera region; shallow earthquakes along the SW. rift zone of Kil

adjacent portion of the Kaoiki fault system; earthquakes along the eastern half of Kilauea's 

zone--detected largely on the Pahoa seismograph; earthquakes from the upper east rift zone an

fault systems of Kilauea's south flank; and earthquakes from other regions: Kona, Mauna Kea, 

Tremor Earthquakes Date (in minutes)

(1965) I i Kilauea Summit SW. rift Upper

1 I Eastern

I

Inter- r and east east. 

Deep mediate Shallow 30 KM Shallow i Kaoiki rift rift i j i

8 I July 1 ---- ----- -----

2 29 I ----- 5 I 1 H

2 ---- ----- ----- 1 30 ! 3 ----- i 4 j

I

--

3 ---- ----- ----- 1 30

4 ----- I 5 1 M

4 ---- ----- ----- 5 25

9 1 5 --

i

5 ---- ----- ----- ----- 23 !

5 ----- I 6 --

6 ---- ----- ----- 3 37 5 ----- I 7 --

7 ---- ----- ----- 1 35

2 ----- i 3 1 H

8

2 50

7 1 f ---- ----- -----

7 --

9 ---- ----- -----

2 74

4 ----- 10 --

10 ---- ----- ----- 3 40

9 ----- 10 --

11

4 ----- -----

6 45 i 10 -----

4 1 K

12 14

4 60 I ----- -----

7 -----

6 --

13 ---- 18 -----

2 30 ! 8 ----- 5 ---

14 ----

4 ----- 1 34 I 5 ----- 10 1 M

15 ----

6 ----- 3 30 3 1 4 1 o

16 29 ----- -- --- ----- 35

6 -----

8

I

1 M

17 ---- ----- ----- 32

6 -----

2 ---

18 ---- ----- ----- ----- 35

2 3 6 ---

19 ---- ----- ----- ----- 47

2 - ----

5 ---

20 ---- I

I

----- 3 1 35

4 I -----

9
Table 3. --Numbers of earthquakes and minutes of tremor recorded on seismographs U, M, A, 

WP, and MP around Kilauea caldera--Continued

7 3 5

Date Tremor Earthquakes

(1965) (in minutes) Kilauea Summit SW. rift Eastern Upper

Inter- ! and east east 

Deep mediate Shallow 30 KM Shallow Kaoiki rift rift

uly 21 ---- ----- ----- ----- 24

3 1 3

22 ----

5 ----- 1 50 12 ------ 12 1 of

23 ---- ----- -----

3 32

4 ------

6 ----

24 ---- -----

5

3 48

5 ------

5 ----

25 ---- ----- -----

2 41

7 ------

8 ----

26 ----

9 -----

4 38 1 ------ 12 1 Ma

27 ---- ----- -----

4 46 10 ------

9 ----

28 ---- ----- ----- 1 43

8 ------

4 ----

29 ----

4 -----

4 47.

7 ------

4 ----

30 ---- I ----- -----

2 39

8 1 5 1 Ma

31 ---- ----- ----- ----- 38

8 ------

4 12 M

ug. 1 ---- -----

4

3 61

5 ------

9 14 M

2 ---- ----- -----

2 35

7 ------

4

9 M

3 ---- ----- ----- 1 25 12 ------

5 15 M

4 ---- ----- ----- ----- 35

7 ------

6 14 M

I

5 ---- -----

7

3 45

5 I ------

4 10 M

6 ---- ! 14 -----

4 55

5

I

------

5 1 Ko

7 ---- ----- ----- 1 45 1

7 ------

3 1 Ma

8 : ---- ----- -----

8 41

3 ------- 12

2 Ma

9 I ---- ----- ----- ----- 38

4 ------

9 ----

10 ---- ----- ----- ----- 37

5 ------ 16 1 Ma

11 32 ----- -----

2 36

6 ------ 12 ----

12 ---- ----- ----- ----- 38

5 ------ 10 ----

13 I ---- 14 ----- ! ----- 27

3 ------

3

14 15 ----- -----

2 45

7 - -----

5 ----

15 ---- ----- ----- ----- 40 10 -- - ---

5 1 Ma

3 Ma

16 ---- 24 ----- ----- 57

8 1 ------

4 Ma

1 i 2

8 i ---- ----- --.. -- ------ 10 1 Ma

J

A

co
Aug. 18 '"'0

9

3 48

6 13

...,I

19 32

4 55

6 ------ ----

20 31

4

4 53

9 12 1 of

21 10 43

8 15 1 Ma

22 20

3 55 12 10 ----

23

8

2 45

9 24 ----

24

6

3 35

5 303 1 Ma

25

3 17

6 285±

26

2 35

6 66 ----

27

5 22

3 30 1 Ka

28 1 25

4 20 ----

29

3 23

3 10 1 Ko

30 11 1 40

9 10 1 Ma

1 of

1 off

31

4 27 29

5

5 ----

Sept. 1 40

3 25 ----

2 51 11 10 1 Ka

1 of

3 9

4 48

5 lO ----

\0

4 1 90

5 10 ----

5

5 1 115

7

5 ----

6

2 50

6 ------ ----

7

4

2 80

7 10 ----

8 48

3

5 1 Ma

9

3 1 55

3 13

2 Ma

10 1 49 12

3 ----

11 12 50

8 10 1 Ma

12 ---- 16 40 10 1 6 ----

13 34

8 30

8 1 10 ----

14 3 10 45 12

8 1 Ka

15

8

3 42

6 10

2 of

16 20 30

6

5 ----

17 10 53 12 15 ----18

5 48

6

7 1 of

1 Ma

19

2 40

6 10 ----

20

6 3 65

7 21 1 Ma

21

2 76

7 16 1 Ma

22

7 1 84 10

5 ----

Table 3. --Numbers of earthquakes and minutes of tremor recorded on seismographs U, M, A, D

WP, and MP around Kilauea caldera--Continued

Date Tremor Earthquakes

(1965 ) (in minutes) Kilauea Summit SW. rift Eastern Upper

Inter- and east east 

Deep mediate Shallow 30 KM Shallow Kaoiki rift rift

Sept. 23 ---- ----- - ---- 3 75 7 ----- 5 1 o

24 ---- ----- ----- 2 44 7 ----- 5 1---

25 ---- -- --- ----- 3 50 5 -- --- 25 ---

26 ---- ----- ----- 3 62 12 ----- 5 1 o

27 ---- ----- ----- ----- 47 7 ----- 8 ---

28 ---- ----- ----- ----- 56 10 ----- 7 ---

29 ---- ----- ----- ----- 45 7 ----- 5 ---

30 ---- ----- ----- 2 73 3 -- --- 10 1 n
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological Survey

July, August, September, 1965

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

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

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

Date Time Magni- Depth Epicenter 

(1965) h m s tude (km) Lat. N. Long. w. Description 

- - -

July 1 21 40 11.0 2.5 3 19°42.8' 155°47.9' 27 km NE. of Kealakekua 

3 11 57 40.6 3.0 8 19°11.9' 155°36.6' 15 km NNW. of Naalehu 

5 21 33 05.1 2.5 27 19°15.8' 155°28.2' 7 km NNE. of Pahala 

6 21 18 14.8 2.0 8 19° 18.3' 155°08.0' 9 km SEe of Makaopuhi 

seismometer.

7 00 31 36.8 3.6 13 20°43' 156°30' 11 km WSW. of Ha1eaka1a 

8 23 26 07.0 2.0 5 19°21.5' 155°08.3' 5 km E. of Makaopuhi 

seismometer.

11 14 37 13.4 2.5 8 19°24.0' 155°47.9' 18 km SEe of Kealakekua 

14 02 43 46.0 2.0 25 19°20.1' 155°20.8' 4 km E. of Desert 

seismometer.

15 13 32 04.1 3.8 30 19°22.8' 155°14.3' 3 km E. of Ahua 

seismometer. 

- 

16 04 26 33.0 2.0 5 19°25.0' 155°23.3' 8 km S. of !'v1auna Loa 

seismometer.

16 16 54 02.6 2.5 8 19°12.4' 155°35.4' 16 km N. of Naalehu 

17 01 58 53.7 2.7 8 19°24.5' 155°29.2' 14 km of Desert 

seismometer.

18 04 56 15.6 2.3 3 19°23.1' 155°30.7' 14 km WNW. of Desert 

seismometer.

18 12 15 37.5 2.0 3 19°22.4' 155°12.6' 4 km WNW. of lvrakaopuhi

I seismometer.
July 19 17 05 09.8 2·5 8 19°22.6' 155°24.2' 5 km NNW. of Desert 

seismometer.

22 07 15 44.0 3·0 5 19°16.8' '155°13.3' 11 km SSW. of rv1akaop

seismometer. 

22 12 27 04.2 4.3 3 19°20.1' 155°30.6' 14 km W. of Desert 

seismometer.

22 18 37 07.5 3·0 8 18°59' 156°47' 48 km SW. of Kealakek22 19 58 45.0 2.1 5 19°19.5' 155°10.5'

6 km S. of Makaopuhi 

seismometer.

26 04 07 35·5 2.5 8 19°24.1' 155°40.3' 15 km SW. of North B

seismometer.

26 06 58 45.3 2.7 5 19°21.2' 155°05.3' 11 km E. of Makaopuh

seismometer.

27 01 51 01.4 2.0 28 19°23.1' 155°16.1'

2 km NW. of Ahua

28 10 40 23.7 3.1 5 19°24.1' 155°29.9' 14 km NW. of Desert 

seismometer.

29 14 31 28.3 2.4 5 19°23.1' 155°29.8' 13 km NW. of Desert 

seismometer.

29 17 54 12.0 2.0 8 19°26.8' 155°28.7' 11 km SW. of Mauna Lo

j--J seismometer.

lAJ 29 20 16 29.8 2.2 30 19°20.1' 155°15.2' 5 km S. of Ahua 

seismometer.

29 21 '19 47.6 2.9 3 19°21.5' 155°05.5' 10 km E. of lvlakaopuhi 

seismometer.

30 22 09 13.0 2.4 lu 19°23.8 ' 155°34.9' 11 km S. of North Bay 

31 11 24 17.3 2.1 13 19°23.3' 155°37.7' 13 km SW. of North Ba

seismometer.

31 16 54 56.7 2.3 45 19°27.3' 155°35.7'

4 km SW. of North Bay 

seismometer.

August 1 03 17 22.0 2·5 40 19°29.1' 155°35.6' 3 km SW. of North Bay 

1 15 28 32.1 2.1 3 19°24.1' 155°27.1 ' 10 kmNW. of Desert 

seismometer.

2 03 44 48.9 2.3 50 19°29.0' 155°32.9' 5 km ESE. of North Ba

seismometer.

3 11 46 55·7 2.0 27 19°23.8' 155°17.8 ' 3 km S. of Uwekahill1a 

4 15 47 35·1 2.3 5 19°20.1' 155°17.9'

7 km SW. of Ahua 

seismometer.

4 21 44 18.1 2.6 35 19°17.1' 155°00.5' 8 km ssw. of Ka1apana 

6 00 58 10.2 2.2 5 19°29.0' 155°46.0' 17 km ESE. of Kealake

7 07 01 08.5 2.0 3 19°24.9' 155°26.1' 10 km NW. of Desert 

I seismometer.

7 10! 07 39·2 2.1 40 19°07.6' 155°25.2' 19 km ESE. of Naalehu 
Table 4. --Local earthquakes recorded by seismographs of the U.S. Geological Survey

July, August, September, 1965--Continued

Date Time Magni- Depth Epicenter 

(1965) h m ; s tude (km) 

- - - Lat. N. Long. W. Description

August 8 19 32 I 31. 5 2.0 8 19°17.8' 155°12.8' 9 km ssw. of Makaopu

I seismometer.

9 10 06 1 38.2 2.4 3 19°20.9' 155°07.3' 7 km ESE. of Makaopu

22 j 42.5

seismometer.

10 05 2.4 5 19°40.9' 155°35.1' 21 km N. of North Bay 

seismometer.

11 12 18 i 16.5 3.7 3 19°05.7' 155°06.4 ' 20 km SSE. of Apua P

I 

i 

1

I 

!

I 

15 09 57! 58.6 2.0 8 19° 52.5" 155°26.8' 17 km NE. of Pohaku10

16 15 16 I 31. 6 2.4 5 19°22.6' 155°27.1' 9 km NW. of Desert 

seismometer. 

i 

17 12 28 117.4 3.3 30 19°21.2' 155°18.0' 4 km SW. of Ahua 17 17 21114.5 2.7 <3 19°15.7' 155°35.3' 22 km N. of Naalehu 

19 16 41 33.0 2.0 25 19°17.8' 155°14.9' 9 km SSE. of Ahua 

! I seismometer.

i 20 09 45 147.0 3.1 13 19°39 ' 156°24' I 56 km WNW. of 

I I Kealakekua. 20 23 52 ; 31.0 2.3 3 19°16.2' 155°13.5' I 5 km WNW. of Apua Po

21 13 16 I 46.0 2.2 8 19°21.5' 155°12.2' I 3 km wsw. of Makaopu

seismometer.

21 20 33 52.5 2.1 10 19°31.5' 155°31.6' 7 km ENE. of North B

seismometer. 

22 14 09 25.0 2.1 8 19°22.1' 155°26.5' 7 km WNW. of Desert 

seismometer.

22 14 13 05.5 2.1 30 19°23.9' 155°17.5' 2 km S. of Uwekahuna 23 00 26 21.4 2.0 8 19°19.8' 155°04.1' 13 km ESE. of Makaop

seismometer.

23 11 25 . 07.0 3.6 8 19°16.8' 155°11.9' 2 km N. of Apua Poin

11 . 43 19.6 3.4 19°15·9' 155°11.2'

J

23 of Apua Poi

3 1, 2 km NE. 

! i 
August 23 14 11 44.8 2.0 8 19°21.4' 7' 15 km E. of Makaopuh

se i :nometer.

24 10 05 28.0 2·9 8 19°19.5' 155°26.2'

6 km TdS-"'. of Desert 

3eismometer.

24 11 38 06.2 2·9

5 19°18.7' 155°12.5'

8 km SW. of t-.1akaopu

seisrnometer.

24 14 06 08.8 2.3

5 19°16.8' 155°13.0' 11 km SSW. of 

seismometer.

24 22 35 20.2 3.0

5 19°20.5' 155° 08.5 I 5 km SEe of Makaopuh

seismometer. 

25 00 14 44.6 2.2

5 19°19.8' 155v 05.7' 11 km ESE. of Ivlakao

seismometer.

25 00 31 15·9 2.0 8 19°19.5' 155°10.5'

5 km S. of Makaopuhi 

seismometer.

25 00 38 19·5 2.1

5 19°20.5' 155°11.7' 3 km Svl. of 

25 00 43 59·0 2.3

5 19°20.2' 155°11.7'

3 km SW. of Makaopuh

seismometer.

25 00 46 32.8 2.0 8 19°19.0' 155°09.4'

7 km SSE. of Makaopu

seismometer.

25 00 52 49.2 2.9 3 19°21.0' 155°10.0'

3 km SEe of Makaopuh

j---J seismometer. VI

25 01 03 11.3 2.4 3 19°21.2' 155°07.8' I ESE. of Makaopu

25 01 12 13.2 2.2

5 19°21.0' 155°08.9'

5 SEe :Jf lv1akaopuh

seismometer.

25 01 14 28.0 2.0

5 19°20.7' 155°08.2' r

0 ESE. of 1Y1akaop

seismometer.

25 01 23 01.3 2.3 10 19°20.9' 155° 14. ()'

6 SE. of Ahua 

25 01 34 17.0 3.6 8 19°19.2' 155°09.8' rm SSE. of Makaopu

seismometer.

25 01 48 44.8 2.2

5 19°20.0' 155°11.2'

5 km ssw. of Desert 

3eismometer.

25 01 53 06.0 2.1

5 19°20.1' l55°12.2'

5 km SW. of Makaopuh

seismometer.

25 01 58 48.0 2.1

5 19°21.2' 155°11.1'

3 km SW. of Makaopuh

seismometer.

25 02 07 12.0 2.7

5 19°20.0' 155°10.1'

5 km SSE. of Makaopu
Table 4. --Local earthquakes recorded by seismographs of the U.S. Geological Survey

July, August, September, 1965

. 7 km SW. of Uwekahuna

8 km SW. of Uwekahuna

155°19.5'

155°20.8'

19°22.8'

19°23.0'

32

31

I

,

18

1

05

23 i 49

I

31

31

Date Time IDepth Epicenter 

(1965) h m. s f tude (km) Lat. rq _ Long. w. Description 

- - -

34.0

. i

ugust 25 02 15 i 2.8 5 19°19.5' 155°10.8' 5 km S. of Makaopuhi 

j seismometer. 

25 02 37 !24.5 2.3 Ij 5 19°19.5' 155°12.5' 7 km SW. of Makaopuhi 

f seismometer.

25 02 59 '35.5 :3.5 5 19°19.0' 155°09.1' 7 km SEe of Makaopuhi 

! 1 seismometer. 

25 03 53 l02.1 2.1 5 19°20.1' 155° 09.5' 5 km SEe of Makaopuhi 

I

, : seismometer.

25 05 09 ;47.7 2.8 5 19°20.0' 155°09.7' 5 km SEe of Makaopllhi 

" seismometer.

25 06 30 11.2 2.3 5 19°19.1' 155°12.0' 7 km ssw. of Makaopuh

seismometer.

25 09 06 29·1 3.0 5 19°19.9' 155°09.9' 5 km SSE. of-Makaopuh

seismometer. 

25 12 33 :L6.5 2.7 3 19°19.9' 155°09.4' 6 km SEe of Makaopuhi 

27 18 37 51.6 : 2. '7 5 19°31.9' 155°45.1' 18 km E. of Kealakekua 

28 16 26 31.8 2.8 27 19°22.9' 155:)16.8' 2 km NW. of Ahua 

seismometer.

29 09 31 14.5 3.1 8 20°13.2' 155°36.0' 23 km NNE. of Kaml.le1a 

29 09 39 58.3 3.0 3 19°23.9' 155°27.2' 10 km NW. of Desert 

seismometer.

30 14 05 50.3 3.1 8 19°35' 156°26' 50 km WNW. of Kealakek

30 16 43 15·0 3.2 8 20°29' 156°10' 35 km SSE. of Haleaka1

seismograph.

30 22 18 13.7 2.0 5 19°20.9' 155° 08.3' 5 km ESE. of

I seismometer.

31 16 05 02.2 3.0 5 i 19°25.2' 155°25.1' 10 km NNW. of Desert 

i

I seismometer. !

31

I 18 00 57.0 '3.8 32 19°21.8' 155°20.0' 7 km NE. of Desert 

I seismometer. 

A
September 1 09 34 :28.7 2.7 5 19°25.0' 155°26.0 1 11 km NW. of Desert 

seismometer. 

2 01 42 3.7 3 19°14.1 1 155°03.8' 15 km ESE. of Apua P

2 09 18 49.6 2.7 5 19°18.7' 155°12.2 1 9 km SW. of Makaopuh

seismometer.

3 21 117 i53.2 2.6 8 19°24.4 1 155°24.0 1 8 km N. of Desert 

05/55

seismometer.

5 1 14.2 2.0 3 19°07.2 1 155° 15.2 1 16 km SW. of Apua Po

5 07136 '07.8 2.0 5 19°23.9 1 155°26.3 1 9 km NW. of Desert 

I seismometer.

6 02 102 i 56.7; 2.1 30 19°18.0' 155°18.8' 10 km ESE. of Desert 

seismometer.

6 02 33 '39·5 2.0 5 19°19.7 1 155°08.7'

7 km SEe of Makaopuhi 

seismometer.

7 05 1 04 37.2 2.3 27 19°23.5 1 155°19.2' 5 km SW. of Uwekahun

8 15 1 54 59·2 ! 2.7 35 19°15.8 1 154°55.5 1 11 km SSE. of Ka1apa

9 10 58 44.31 3.2 8 19°14.3 1 155°35.7' 19 km N. of Naalehu 

9 11 : 04 22.2 ; 2.5

8 19°13.2 1 155°35.2' 17 km N. of Naalehu 

9 14 ! 47 41.5 2.5 30 19°20.9' 155°18.5'

6 km SW. of Ahua 

t-' seismometer.

-:J

9 16 i 12 33.0 i 2.5 3 19°20.5 1 155°10.0'

4 km SSE. of Makaopu

seismometer.

12 16 1 12 00.0 2.5 30 19°21.8' 155°18.7' 5 km wsw. of Ahua 

seismometer.

13 04 i 4g ; 44.2 2.7 25 19°24.5' 155°19.0'

4 km SW. of Uwekahill1

14 21 : 32 . 09·0 2.3 <3 19°26.9' 155°47.4' 16 km ESE. of Kealak

15 1'5 : 27 19· 5 : 2.2 5 19°25.2' 155°26.3' 11 km NW. of Desert 

1 seismometer.

181 06

i

15 54.0: 2.1 27 19°24.0' 155°17.9'

4 km ssw. of Uwekahu

. I

16 10 130 53.3 1 2.5 25 19°23.2 1 155°19.7'

6 km SW. of Uwekahun

16 10 147 ·51.0 ; 2.3 30 19°21.9 1 155° 18.1'

5 km wsw. of Ahua 

seismometer.

16 14 1 21 : 40.7 i 3.0 30 19°22.8' : 155°17.2' 3 km WNW. of Ahua 

seismometer.

17 06 ! 53 48.9 ! 2.4 30 19°22.3' 155°18.8'

6 km W. of Ahua 

seismometer.

17 18 17 56.8 ; 2·9 30 19°22.4 1 155°19.2 1 7 km W. of Ahua 

seismometer.

18 05 1 08 44.0 3·2 8 19°11.5' 155°36.1' 14 km N. of Naalehu 
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological Survey

July, August, September, 1965--Continued

Date

(1965)

Time Magni - Depth

h m stude (km) Lat. N.

Epicenter

Long. w. Description

42 km SSE. of Apua P

15 km NNE. of.Naaleh

5 km E. of Makaopuhi

seismometer.

11 km E. of Makaopuh

seismometer.

8km ESE. of Makaopu

seismometer.

10 km NNW. of Naaleh

51 km wsw. of Kealak

10 km E. of Makaopuh

seismometer.

7 km SEe of Makaopuh

seismometer..

10 km ENE. of Makaop

7 km SW. of Uwekahun

29 km ESE. of Naaleh

11 km ENE. of·Makaop

seismometer.

8 km SEe of Makaopuh

seismorneter.

133 km NW.· of Ha1eak

seismograph.

155°06.8'

155° 33.8 '

155 0 08.3'

155°04.8'

155°06.8'155°36.5'156°23'155°05.5'155°07.7'155°05.7'

155°20.8'

155°19.7'

i55°04.8'

155° 08.6'

19°20.5'

19°09.1'

19° 28'

19°21.5'

19°22.0'19°23.8'

18°59.8'19°22.7'

18°53.2'

19°12.1'

19°21.6'

·8

3

3

3

5

88

5

5

5

26

8

3

5

8

3.3

2.0

2.32.52.5

3.0

3.1

2.1

2.2

2.3

4.0

53.5

08.0

25

17 18

23 14 39.0

00 30 24.5

i 10 46 56.9

21 '08 54 42.0

21 I 09 53 27.5

l 21 21 53 01.4

4 i 2 I' 00 57 15.5

25 11 21 25.1

25 I 15 25 32.5

j

I 25 ! 17 35 14.3

26 : 02 21 59.3

26 ! 11 20 14.2

28 I 00 43 50.0

28 I 03

30 I

September 18

20

20
Table 50 --Distant earthquakes

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

Hawaiian 'Standard Time" ·A.tT C n. 'following the time of P indicates

compressional first motton; a lTd" indicates dilatational first .motiono

Station symbols, locations, and instrumentation are presented in

table 6,. Summary ,370 Magnitudes calculated from the Hawaii seismograms

are followed by (HVO-) v Location of epicenter, origin times, focal depths,

and magnitudes reported by other institutions are taken from "Preliminary

Determination or Epicenters" published by the UoS. Coast and Geodetic

Survey.

July 1, 1965

U PEZ eR 23:49:36

C&GS card 058-65:

23:12:45.4

60.3° So, 163.7° w.

South Pacific Cordillera

h about 33 km

Magnitude 6.75 (Brk),

5.5 (eGs).

July 2

July 2--Continued

C&GS card 057-65

20:58:40.0

5301~ No, 167.7° W.

Fox Islands, Aleutian Islands

Slight damage on Umnak Island

h about 59 km

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

6.75 (Pal), '705 (HVO).'

July 6

M Z eP 18:45:26.9 c

A Z eP 26.9 c

lv1P Z eP 27.1 c

Na Z iP 24.2 c

Hi Z eP 28.8 c

U PEZ eS 18: 52: 35

C&GS card 058-65:

18:36:4703

4.5° So, 155.1° Eo

. Solomon relan'de

h about 510 km

Magnitude 6-6025 (Pas),

6025 (Brk),

605 (eGs) 0

C&GS card 059-65:

03:04:19.8

22.6° S., 172.9° E.

Loyalty Islands region

h about 41 km

Magnitude 6 (Brk), 5.9 (eGs).

July 6

M

A

D

lv1P

U

Pa

Na

Hi

Ka

Ke

Ha

U

U

U

U

M

A

D

lv1P

U

Pa

Hi

NB

Ke

Ka

Ha

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

PEZ

PEN

PEN '

PEZ

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

eP 21:05~2707 d

eP 2807 d

eP 2807 d

eP 28.7 d

iP 2803 d

iP 2902 d

, iP -30.8 d

iP 26~4 d

. eP 22.3 d

iP 25.7 d

iP 1506 d

iPP 21:06:46

is 21':10:53

iG 21 :12·: 53

iR 21:14:16

Tmax 21.:43':06

Tmax 21:43: i8

Tmax ·2'1 :42 : 58

Tmax 21:43:07

Tmax 21:43:09

Tmax 21:43:15

Tmax 21:42:44

Tmalc' 2l: 42 ~'44

Tmax· .' 2·1·: 42:' 33

Trnax 21:41:'54

Tmax 21:41:46

M

Hi.

D

z

Z

PEZ

iP

iP

eR

03:13:28.0 d

30.8 d

03:27:35
," . .

'Table 5~ -~Distant- earthquakes --Continued

July .7'j 1965

M Z iP 21: 48 : 36'0 0 'd

D Z .·iP , 36~'2 d

Hi Z iP 37~1 d

NB Z iP '3409 'd

C&GS card 06~-65:

22~33:16

1108° So, 166~lo Eo

Santa Cruz Islands

h about 30 km

Magnitude 406 (CGS)o

C&GS card 057,-,65: .

21~38:50c5

32.7° No, 138.7° EQ

South of Honshu, Japan

h about 218 km

Magnitude 5~6 (CGS)o

July 16

C&G$ card 661-65:

12:47:49.4

7.2° _S Q ,_ 153.~ 6~, Eo

New Britain region

h about 28 km

Magnitude 507 (CGS)o

13:08:15.8 c " '~14. 9 c

12:57:3107 c .. 12 :'57:'3405 c

eP

eP

e~\ ,

"eP

Z,'

Z

Z

Z

C&GS card 061-65:

12:59:10.7

27.2° S., 177.60Wo

Kermadec Islands

h about 27 km

Magnitude 504 (CGS)o

July 17

July17

Ke

Hi

MP

Ke

u PEZ eR 22:56:17

C&GS card 060-6,5:

07:20:3005 ,

907° So, 15908° E.

Solomon Islands

Felt at Honiara

h about 23 km :

Magnitude 505 (Br,k),''604 (CQ-S),

5.6 (HVO) a

July 17

C&GS card 063-65:

13: 18 :27.4 ,

7.50N., 124~3° E.

Mindanao, Philippine Islands

Felt at Cotabato, Malayba1ay, " and General Santos .

h about 45 km

Magnitude 508 (CGS).

July 21

U PEZ eP',,-

U PEE eS

U, ,PEN "~p.

U . PEZ eR

13':30:3007 c

02:59:51

03: 06 :25··

03:09:48:

03,: 11: 51.,~·

z eP

eluly 20

M

• ',' ,'I

C&GS.. card o6,t~'65:

.02:51;39.Q" .

20,.8° S.,., ..17~?8° w. T,~ng~ 'Is1a.nd,~

h about 57 km

Magnitude 5.7 (CGS).

07:29:49~7 c

'49.0 c

5000 c

49.6' c

51'Q'6 c

46uo c

07:37:25

07:42:05

07:43;50

08:25:12

08:24:52

iP

iP

eP

eP,

eP

iP

eS

eG

eR

Tmax

Tmax

Z

Z

Z

Z

Z

Z

PEZ

PEN

PEZ

Z

Z

M

D

:ME'

U

Hi

NB

U

U

U

NB

Ke

,.; 20
Table 5o--Distantearthquakes--Continued 1

August l--Continued

August 1

C&GS card--Continued

4609° Nu, 14308° Eo

Sakhalin Island.

h about 400 km

Magnitude 507 (CGS)o

C&GS card 063-65:

16:41:13~7

5207° No, 15304° Eo

Northwest of Kurile Islands

h about· 462 km

Magnitude 501 (CC-S) 0

16:49:3604 c

36~9 c

38.3 c

3608 c

36.4 c

3507 c

iP

iP

iP

eP

iP

eP

z

Z

Z

Z

Z

Z

August 1

M

D

:MJ?

U

Hi

NB

C&GS card 063-65:

08:29:22.1

51.2° N., 17103° w.

Fox Islands, Aleutian IslandsD

h about 23 km

Magnitude 6.5-6.75 (Pas),

6.25-605 (Brk),

6.75-7 (Pal),

: 604 (CGS),

606 (RVO)o

July ,29, 1965

M Z eP 08:36:0508 c

A Z eP 06.6 c

D Z eP 060·4 c

MP Z eP 0607 c

U Z eP 06vo c

Hi Z eP 0406 c

NB Z iP 0406 c

Ke Z eP 0305 c

Ha Z eP 08~35~57D9 d

U PEN iPP 08:37:17

U PEZ is 08~41:39

U PEE iL 08 :43 :1'7

U PEZ iR 08:44:59

July 30

M Z iP 07:32:0608 c

D Z iP 06.6 c

IYIP Z iP 050,5 c

u Z iP 06.1 c

Hi Z eP .0501 c

NB Z iP 07.9 'c

C&GS card 063-65:

07:20:1003

6.7° N., 73000Wo

Northern Colombia

Felt at Bogota .

h about 174 km

Magnitude 503 (CGS).

M Z iP 23:54:0702 c

A Z iP 0604 c

MP Z iP 0608 c

Ke Z eP 04.3 c

Ha Z eP 1207 c

U PEZ eR 00~10:09

C&GS card 064-65:

23:44:2803

3205° So, 17809° Wo

South of Kermadec Islands

h about 44 km

Magnitude 508 ACGS), 507 (HVO)o

August 1

M

NB

Z

Z

i.P

iP

l5~11:5803.d

57v2 d

C&GS card 066-65:

15~02:5601 21
Tab Ie 5 - -Distant ' e'arthquakes - -Continued

00:17:39.5 c

41.5 c

41.6 c

38.6 c

3501 c

00:25: 36

00:31:54

00:34:14

August 8

M Z iP 09:58:14.7 c

C&GS card 65-65:

09:46:2906

'4.1° No, 128.6° E.

North of Ha1mahera

h about 51 km

Magnitude 5.5 (CGS).

A Z eP

Pa Z eP

Hi Z eP

NB Z eP

Ke Z iP

U PEE is

U PEN eG

U PEZ iR

C&GS card 65-65:

00:07:50.5

503° So, 15107° E.

New Britain region

Felt on eastern New Britain

h about 47km

Magnitu~e 6.5 (Pas), 5~75-6 (Brk),

6.5-6075 (Pal),

6.3 (CGS), 608 (HVO).

August 4--Continued

C&GS- card--Continued

Oaxaca, Mexico

h about 117 km

Magnitude 5.2 (CGS).

August 5

August 8

M Z iP 12: 56 :.19. 9 c

Ha Z Tmax 13:32:34

C&GS card 65~65:

12:49:23.1

51.9° N., 17503° w.

Andreanof Islands, Aleutian Islands

Felt on Adak Island.

h about 53 km

Magnitude 4.5 (Brk), 5.1' (CGS).

22

02~13:4800 c

'4702 c

47.8 c . 46.6 c

4703 c

46.9 c

50.7 c

5400 c

13,: 32 :310 7 c

31~3 c

30.6 c

,31,,0 c

'3104 c

32.3 c

13.:35:53

13:43:07

13:43:37

13:44:05

13:48:45

13:54:39

13: 55 :29

13:58:41

01:15:3208 c

32.0 c

32.8 c

3104 c

iP

iP

eP

i.P

iP

eP

iP

eP

C&GS card 063-65:

02:01~52u2

7 0 7° S o,~ 810'30w.

Off coast of riorthern Peru

h about 49 km

Magnitude 5025-505 (Brk), '

5 (Pal)~ 508 (CGS).

August 3

M Z

A Z

D Z

MP Z

U Z

Hi Z

Ke Z

Ha Z

August 2, 1965

M Z eP

A Z eP

D Z eP

MP Z eP

U Z eP

Pa Z eP

U PEZ iFP

U PEZ is

U PEZ iScS

U PEN iPS

U PEE iSS

U PEE ~L

U PEN iG

U PEZ iR

C&GS card 064-65~

13:19:5407

56u2° So, 15802° Eo

Macquarie Island region

h about 33 km ,

Magnitude 7-7025 (Pas),

, 7~75 (Brk), '

7 (Pal), 607 (CGS),

700 (HVO)o '

August 4

M Z iP

A Z iP

D Z iP

MP Z eP

C&GS card 68-65:

01:05~5300

1608° No, 9405° w.
Table 5o--Distant earthquakes--Continued

August 11, 1965 August ll--Continued

August 11

C&GS card 65-65:

19:52:2908

1507° So, 16701° Eo

New Hebrides Islands

h about 33 km

Magnitude 6.5 (Pas), 5.6 (CGS)~

6.8 (HVO) 0

M

A

D

1v1P

Na

Ke

Hi

U

U

U

U

M

A

D

U

Na

NB

Ke

Ha

z

Z

Z

Z

Z

Z

Z

PEE

PEZ

PEN

PEZ

Z

Z

Z

Z

Z

Z

Z

Z

iP

eP

eP

eP

eP

eP

iP

is

iSS

i,G

iR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

03:49:'5906 c

5905 c

5806 c

5906 c

'5409 c

5605 c

03:50:0102 c

03:57:19

04:00:59

04~02:1l

04:04~15

04:44:14

06

09

. 05

04:43:44

04:44:18

04:43:58

04:44:33

U

NB

Ha

U

U

U

U

U

Ke

Z eP

Z eP

Z eP

PEE ePP

PEZ is

PEZ iSS

PEE i,G

PEZ iR

Z Tma.x

3007 c

2904 c

3303 c

20:03:43

20~08~49

20:12~35

20~13:39

20:15:55

20:55:39

C&GS card 65-65

18:29:4001

59~6° No, 14508° Wo

G'u1f of Alaska

h about 25 km

Magnitude 505 (CGS)o

C&G·S card 66-65:

03 :40: 56" 2

15.4° So, 16609° Eo

New Hebrides Islands

h about 26 km

Magnitude 7 (Pas), 603 (CGS),

70 1 (HV~O) 0

August 11

August 11

22:40:4907 c

4907 c

4807 c

49.7 c

4503 c

5102 c

49wO c

4700 c

5200 c

22:43:10

22:48:15

22:51:55

22:52:55

22~55:03

23:35:31

18

11

01

00

26

12

51

Z eP

Z eP

Z eP

Z eP

Z iP

Z eP

Z eP

Z iP

Z eP

FEZ ePP

PEZ is

PEN eSS

PEE iG

FEZ iR

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

C&GS card 66-65: 22:31:48~9

1508° So, 16702° Eo

New Hebrides Islands

Damage on Espiritu Santo

h about 33 km

Magnitude 7025-(~5 (Pas), 6.4 (eGs), (~8 (HVD) 0

M

A

D

:MP

Na

Hi

NB

Ke

Ha

U

U

U

U

U

M

A

D

U

Na

NB

Ke

Ha

23

20:01:3007 c

3007 c

19~20:19

33

21

10

23

01

28

19:19:50

eP

eP

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

z

z

Z

Z

Z

Z

Z

Z

Z

Z

M

MP

M

A

D

:MP

U

Hi

NB

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

C&GS card 68-65:

04:40:55113

15 .. 9° S., 107.5° Eo

New Hebrides Islands

h about 34 km

Magnitude 507 (CGS).

C&GS card 68-65:

18:04:5601

16.0° S., 167.4° E.

New Hebrides Islands

Felt-at Port Vila

h about 45 km

Magnitude 503 (CGS) ..

C&GS card 68-65:

11:24:5108

16.0° S., 167.0° E.

New Hebrides Islands

h about 33 km

Magnitude 5.5 (eGs),

5.8 (HVO) ..

August 12}-Continued

11:33:5305 d

52Q7 d

54.0 d

5200 d

11:41:17

11:45:43

11:47:59

04:49:55.9 c

57 .. 2 c

iP

eP

z

z

August 13

August 13

A Z eP

D Z eP

Z eP

NB Z eP

U PEZ eS

U PEE eG

U PEZ eR

M

Ha

M Z eP 13 :06 :5,5. 3 d

Na Z eP 52.,3 d

U PEE eS 13~14:55

U PEN eG 13:21:11

U PEZ iR 13:23:31

C&GS card 67-65:

12:57:0907

503° So, 15202° Eo

New Britain region

Felt widely

h about 41 km

Magnitude 6.5-6.75 (Pas),

7025 (Pal),

509 (CGS),

6~6 (HV9)o.

August 12, 1965

M Z eP 08 :10 :43:. 7 d

A Z eP 43~7 d

D Z eP 42.7 d

MP Z eP 43,,7 d

u· Z eP 43 .. 8 d

Na Z eP 3909 d

NB Z eP 42:~ 8 d

Ke Z eP 42·.2 d

Ha Z el? 45'0'7 d

U PEZ ePP 08 ~12: 51

U PEE eS 08:18:01

U PEZ iSS 08:21:45

U PEE eGo 08:22:55

U PEZ iR 0~:25:15

August 12

C&GS card 68-65: 08:01:43~3

1509° S~, 167.5° E~

New Hebrides Islands

Felt at Port Vila

h about 25 km

Magnitude 6075 (Pas),

605 (Pal),

603 (CGS )"

6.5 (HVO)o

August 12

NB

Ha

z

Z

eP

eP

18:13:5206 c

56 .. 7 c

24
Table 5. --Distant earthquakes--Continued

August 13

M Z eP 13:22:33,2 d

A Z eP 33.0 d

D Z eP 32.1 Q.

MP Z eP 33.~ d

NB Z eP 32.6 d

Ha Z eP 36.6 d

C&GS card 68-65:

17 : 56 :.27 . 6

16.6° S., 167. 6° E:'~-

New Hebrides Islands

h about 39 km

Magnitude 5~4 (cas),

August 13

C&GS card 66.:.65:

21:57:38 .. 7·

6.4? S., 148.5Q·E.

New Britain.region

h about '51 -km ;

Magnitude 5.5 (Brk), 5,·2·-(CGS).

!\ugust 14

U . PEZ iR .11 : 31 :11

C&GS card 70':'65:

11:07:47.1

15.8° S., 166.8° E.

14:12:15.2 c

14.3 c

15.1 c

13.2 c

,13:26: 50. 7 d

51.0 d

49.6 d

50.9 d

49.1 d

13:38:11

13~4o:15

14:18:26

August 17

U PEZ eR 16:40:43

C&C'S card 70-65:

16:17:41.5

15.2° s., 166.6° E.

New Hebrides Islands

h about 19 km

Magnitude 5.8 (CGS).

M Z eP

A Z eP

D Z eP

U Z eP

NB Z eP

U PEN eG

U PEZ iR

Ke Z Tmax

C&GS card 66-65:

13:18:06.0

1105° s., 166.3° E.

Santa Cruz Islands

h about 49 km

Magnitude 5.6 (CGS)c

August 14--Continued

C&GS card 70-65~-Coptinued

New Britain Islands

h about 33 km

Magnitude 6 (Pal)J 5.5 (CGS).

August 14

August 17

U PEZ eR 11:23:56

C&GS card 66-65:

10:35:04.1

5.. 3° N., 96.2° E.

Northern Sumatra

h about 33 km

Magnitude 5.3 (eGs).

'August 17

M Z eP

A Z iP

D Z eP

:MP Z eP

C&GS card 66-65:

14:02:19

15.2° N., 92.1° W,

Mexico-Guatemala border region.

h about 121 km

Magnitude 4.9 (CGS).

25

18 :: 05 : 30. 8 c

12 :49 :34. 8 d"

34.8 d

33,7 d

34,9 d

31~0 d

12: 56: 57

13~00:39

13:01:35

13:03:39

13: 43':43

Hi Z

No C&GS listing.

August 13

Hi Z eP

August 13, 1965

M Z eP

A Z eP

D Z eP

!vIP Z eP

Na Z. eP

U PEZ is

U PEZ iSS

U PEN iG

U PEZ iR

Ke Z Tmax

C&GS card 68-65:

12:40~08.3

15.9° S., 166.8° .E,

New Hebrides Islands

h about 33 km

Magnitude 7 (Pas), 7-1.25 (Brk),

5.6 (eG·s)., 7.7 (RVO).
Table 5. --Distant earthquakes--Continued

August 18, 1965

M Z eP 15:00:3103 d

U PEZ is 15:07:5l.

'U PEZ eSS 15:11:31

U PEN eG 15:12:39

U PEZ e'R 15:14:43

C&GS card 71-65:

14:.51:29.3

16.0° S., 167.0° E.

New Hebrides Islands

Felt at, Port Vila

h about 5 km

Magnitude 5.75-6 (Pas),

6 (Brk),

5.7 (CGS),

6.2 (HVO).

August 20

M Z iP 06:06:·20.4 d

A Z eP 20.8 d

D Z eP 20.1 d

MP Z iP 21.0 d

U Z iP 20.5 d

Pa Z eP 22.0 d

Na Z iP 18.6 d

Hi Z iP 22.3 d

NB Z iP 1'9.5 d

Ha Z iP 17.5 d

u PEZ isP 06: 08 :07'

U PEE is 06:15:53

U PEN iG 06:27:31

U PEZ i 06: 31: 39

COOS card 69-65:

05:54:5000

5.7° S., 128.6° E.

Banda Sea

h about 326 km

Magnitude 6.75 (Pas),

6.2 (CGS).

26

August 20

U Z iP 21:30:14.0 c

Pa .Z eP 15.2 c

Na Z iP 10.9 c

Hi Z iP 17,,0 c

NB Z iP 14.. 0 c

Ha Z iP 20.4 c

u PEE eS 21:37:01

U PEE iG 21:40:49

U PEZ eR 21:43:04

C&GS card 69-65:

21:21:50.9

2209° S., 176.3° w.

South of Fiji Islands

h about 77 km

Magnitude 5.75 (Brk),

6-6.25 (Pal),

6.2 (CGS).

August 23

M Z iP 19=55:47.3 c

D Z iP 4701 c

MP Z eP 45.8 c

Na Z eP 47.6 c

NB Z eP 47.8 c

Ke Z eP 51·5 c

Ha Z eP 55.6 c

U PEN is 20:03:37

U PEZ iSS 20:07:31

U PEN eG 20:09:47

U PEZ eR 20:11:39

C&GS card 69-65:

19:46:02.9

lq.3° N., 95.8° w.

Oaxaca, Mexico

Five killed in Mexico City,

one killed in Oaxaca.

Slight damage in Mexico

City and Oaxaca.

Felt throughout southern

Mexico.

h about 28 km

Magnitude 7.25 (Pas), 7.5-7.75

(Brk), 7.25 (Pal),

6. 7 (CGS), 7. 3 (HVO).
Tiab le- .5 ~- ~D i stant eart.hquake s - -Continued

September l·~

C&GS card 77-65:

12:46:3001

15a7° S", 16706° Eo

New Hebrides Islands

Felt at Norsup

h about 10 km

Magnitude 600 (CGS)o

·C&GS card 70-65--Continued

1401° No, 90.5° We

Guatemala

h about 107 km

Magnitude 405 (Brk)j 500(CGS)"

August 29

12:55:35

13:07~11

Z eP

PEN eGMU

C&G·S card 7'0.:65,,:

07 06: 500 0 ,

2l~9° So, '17703° W~,

Fiji Islands r~gion

h about. 290 km

Magnitude 4075 (Brk),

507 (CGS)

August 24, 1965

M: 'Z iP 07~14~4806 c

A' Z eP' 4802 c

D Z eP 4706 c

MP ,'- Z iP 4801 c

U Z iP 48.~ 3 c

Pa . . Z iP " 5000 c

Na Z iP 4400 c

Hi Z iP 5100 c

NB Z eP 4708 c

Ke Z iP 4605 c

Ha Z eP 5307 c

August 24

M Z Tmax 14:02:56

A Z Tmax 51

D Z Tmax 14:03:03

MP ,Z Tmax 14~02~54

U Z T,max. 58

Pa Z Tmax 52

Hi Z Tmax 36

NB Z Tmax 14~03~18

Ha 'z, Tmax 14:01:36

M Z iP 04:'57~2306 d

A Z iF 22.9 d

D Z eP 2107 d

MP Z eP 2301 d

U Z iP 2300 d

Na Z eP 19~7 d

Hi Z eP 24u8 d

NB Z iP 2206 d

Ke Z iP 2107 d

u PEN eS 05:05~26

U PEZ e 05~14:13

C&GS card 69-65:

13~12:19c4

59~4° No, 145:o'~O We

Gulf of Alaska

h about 19 km .

Magnit'ude 5~25 ,(Brk).9

,504 .{!CGS)~ I

C&GS card 70.;.65:

04~47:3409

3406°, So, 17906° Ee

South of Kermadec Islands

h about 107 km

Magnitude 6025 (Brk),

602 (eGs) 0

August 29 September 2

M Z iP , 01:56~2507 c

A Z iP 25~ 0 c

MP Z iP 2403 c

u Z iP 25,,0 c

M Z eP o4~34:09c2 d

Pa Z eP 10~0 d

NB Z iP o8~8 d

u PEZ eR 04:44:38

C&GS card 70-65~

ol~45~57~3 27
Table 50 --Distant earthquakes~-Continued

September 22 1965--Continued September 8.1

COOS card 71-65:

ll~ 19,: 6404

5507° NQ' 155.4° w.

South of Alaska

h about 33 km

Magnitude 5.4 (CGS),

5.3 (HVO).

C&GS card 72-65:

5705° No, 15201° WIG

Kodiak Island region

h about 25 km

Magnitude 5025-505 (Pal),

506 (CGS)

5Q2 (HVO)Q

M Z iP 03:33:38.3 c

A Z eP 3900 c

D Z iP 3902 c

:MP Z eP 39Q6 c

U Z eP 3807 c

U PEZ eS 03:39:33

M Z Tmax 04:13:35

U Z Tmax 38

Ha Z Tmax 04:11:58

September 8

11:23:3702 c

3800 c

37.6 c

11:29:27

11:33:03

12:02:14

17

08

07

03

12:02:00

12:01:58

49

24

38

iP

iP

eP

eS

eR

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Trnax

Z

Z

Z

PEZ

PEZ

Z

Z

Z

Z

Z

Z

Z

Z

Z

Z

M

A

U

U

U

M

A

D

MP

U

Pa

Hi

NB

Ka

Ha

C&GS card 70-65~

04~26~37D3

51u9° NO J 17505° Eo

Rat Islands j Aleutian

Islands v

h about 39 km

Magnitude 405-5 (Brk)J

506' (CGS)o

September 4

C&GS card 71,-65:

14:32~4709

5802° NVJ 15206° Wo

Kodiak Island region

Felt aboard USC&GSS Surveyor

~ocated at 58°57' NO j 151023' We,

E;pd in a wide area of south •.

central Alaskao

h abol1t 19 km

Magnitude 6075-7 (Pas),

7 (Brk),

6075,-7 (Pal),

601 (CGS),

7.. 0 {liVO)o

M Z eP 14~4o~1300 d

A Z eP 1307 d

U Z eP 1302 d

Pa Z eP 1206 d

Na Z eP 16,) 5 d

Hi Z iP 1002 d

NB Z iP 1304 d

Ke Z eP 1300 d

U PEZ is 14~46~12

U PEN eG 14:48:50

U PEZ iR 14: 50:26

M Z Tmax 15~20:13

A Z Tmax 20

U Z Tmax 15~19:58

Pa Z Tmax 15:20:03

Hi Z 'IJmax 07

NB Z Tmax 45

Ita Z Tmax 15~18:40

28
Table 50 --Distant earthquakes--Continued

September 9, 1965

A Z eP lO~13~3709 d

D Z eP 3804 d

u PEZ eS lO~23~02

U PEN eBS 10:27~26

U PEN eL 10:31~10

U PEZ i.R I

lO~34~40

M Z Tmai 11:29~30

A Z Tmax 24

U Z Tmax 25

Hi Z Tmax 06

Na Z Tmax 36

Pa z· Tmax 11~28~4l

C&GS card 71-65:

10:02:25v4

6G5° Nu J 84~4° Wo

orr coast of Central

America"

h about 27 km

Magnitude 6075 (Pas),

6,.75 .(Brk) J

505 (CGS)-,

6031(HVO)o

September 11

A Z eP 07~02:3901 c

D Z eP 3801. c

U Z eP 39v2 c

Na Z iP 3601 c

U PEN is 07~10~27

U PEN iG 07:16:31

U PEZ eR. 07:19~07

1\1 Z Tmax 08~O3~26

A Z Tmax 26

D Z Tmax 26

U Z Tmax 22 I~B Z Tmax 25

Ke Z Tmax 09

C&GS card 71-65~

o6~53:0105

5030So, 153000Eo

New Britain region

, Felt. at R.abaul

"h abou.t 67 km

~1agnit11de 60 3 (CGS) c'

29

September 1.2

M Z iP o8~50~0504 c

D Z eP 0406 c

Na Z iP 0204 c

Hi Z eP 07~1 c

NB Z eP 04,,1 c

U PEE is 08 58: 07

U PEE eG 09:04:31

U PEZ eR 09:06:47

C&GS card 71-65 08:40~1208

6030

s" , 151," 6° Eo

New Britain region

Felt at Rabaul

h about 48 km

Magnitude 6-6025 (Brk),

602 (CGS) -'

507 (HVO)o

September 13

M Z iP 13:16:1400 c

A Z eP 1501 c

D Z iP 1409 c

u Z eP 14G8 c

Pa Z iP 14~9 c

NB Z eP 1302 c

Ke Z eP 1104 c

U PEN eS 13~23:11

U PEE eG 13:26:59

U PEZ eR 13:29;03

C&GS card 71-65:

13:07:4803

5505° No, 16507° Eo

Komandorsky Islands region

h about 23 km

Magnitude 5.4 (CGS)~

5~6 (HVO) 0
Table 50 --.Distant earthquakes --Continued

September 16

September 13) 1965

C&GrS card 74-65 16~15~4405

36a5° So~ 9705° Wu

Southeast central Pacific Ocean

h about 33 km

Magnitude 5075-6 (Pal),

50 4 (CG·S) (J

C&GS card 73-65:

11:13:5604

104° So, 77~6° w.

Ecuador.

Felt at Guayaquil and Quito

h about 190 km

Magnitude 605 (Pas),

505-6 (Brk),

600 (eGs).

September 17

M Z iP 11:25:4106 d

A Z iP 4007 d

D Z iP 41.4 d

MP Z l.P 4003 d

u Z eP 4008 d

Pa Z eP 3808 d

Na Z eP 4200 d

Hi Z iP 4000 d

NB Z iP 42.6 d

Ke Z iP 11:25:44.1 d

Ha Z eP 4606 d

U PEN eS 11:35:29

Tmax 04 :50 54

Tmax 44

Z

Z

PEZ eR

C&GS card 73-65~

04:10:2206

4004° N v, 12507°

orr coast of northerrl California

h abou.t 33 km

Magni.tude 5 (Brk), 4075-5 (Pal),

506 (eGs) 0

Pa

Ha

u

September 17

M Z eP 16:31:0508 c

Na Z eP 0507 c

U PEE is 16:39:07

U PEN eG 16:44:47

U PEZ iR 16:47:31

C&GS card 72-65:

15:18:38.4

3603° No, 141.2° Eo

Near east coast of Honshu, Japan

h about 66 km

Magnitude 5.2 (CGS) .

September 17

M Z eP 15:28:34.3 c

C&GS card. 73-65~

13~50~1108

7010No, 126u5° Eo

Mindanao, Philippine Islands

h about 179 km

Magnitude 600 (CGS)o

?eptember 16

M Z iP 14~01~4508 c

D Z eP 4503 c

MP Z iP 4604 c

u Z iP 45n9 c

Pa Z iP 4707 c

Na Z eP 4400 c

Hi Z iP 4709 c

NB Z iP .4407 c

Ha Z iP 41.94 c

30

C&GS card 72-65:

16:21:21.9

36.3° N., 14101° Eo

Near East coast of Honshu,

Japan.

h about 72 km

Magrlitude 5.8 (CGS), 6.7 (HVO).
September ,18" 196,5 .

C&GS card 74-65~

22:03~18~8

8020 N , 12608° E~

Mindanao, Phili.ppine Islands

h about 85 km

Magnitude 506 (eGs)"

C&G·S card 75-6'5: 2o~46:39D2 ..

5905° No~ 14501° Wo

Q·ulf of Alaska I

h about 22 km

Magnitude 6 (Pal), 503 (eGs).

U PE.Z: :"eR, .21~ 05: 32

M Z '~rnax c .'2'1':"37 46

A Z ~max, ' . 47

D Z Tmq.x, 2:1·:38 :02

MP Z .~max 21:37~46

U Z ~m~x. 46

Pa Z 1rmax 47

NB Z Tmax 38

H~ Z ~max '21': 36 :22

605 (CGS),

20:11:38.5 d

3500 d

39.8 d

20:28:32 .

M Z iP

Na Z eP

Hi Z iP

U FEZ eR

C&GS card 74-65:

20:01:49~3

5.40S., 151.50E.

New Britain region

Felt at Rabau1

h about 57 km

Magnitude 5-5.5 (Brk),

600 (HVO).

~Septerq.per 2l--Continued

C&GS card--Continued

Magnitude 6075 (Pas), 6025 (Brk),

6.0 (CGS), 604 (HVO).

Septemberr 22

M Z iP 09:46:53.4 c

e&Gs card 74-65:

09:35:25.3

1.3° S., 134.0° E.

West New Guinea region

h about 14 km

Magnitude 508 (eGs).

September 22

22:14:5808 c

5905 c,

eP

eP

z

z

M

MP

September 18

September 19

U PEZ eR 14:30:12

C&GS card 75-65~

13:55~39a9

5404° So, 135.7° Wo

South Pacific Cordillera

h about 33 km

Magnitude 4~8 (CGS)o

Sep"tember 22

22:17:4801 c

49.4 c

22:25:46

22:31:32

22:34:06

eP

eP

eS

eL

iR

M Z

NIP Z

U PEE

U FEN

U PEZ

C&G~ card 74-65:

22:08:01.1

36040·N., 14103° Eo

Near east coast of Honshu, Japan

Felt at Tokyo

h about 44 km

Magnitude 6075 (Pas), 6,,25 (Brk),

5ft6 (CGG), 602 (HVO).

31

01~49~20~3 d

1909 d

21,,2 d

1703 d

01:58:12

02:02~28

·..02 ..0-5"7: 51·

September 21

WP Z iF

Na Z iP

Hi Z iP

Ke Z eP

U PEZ is

U PEN eBS

U PEN~~. . .. j.G..

C&(}S card 73-65:

01~38~30.2

29" 1° No, 1280 2~ Eo

East China Sea

h about 197 km
Table 5.,-.~p=!-;3tant ·~arthquakes--Continued

September 26, 1965 September 30--Continued

C&GS card 76-65:

00~36:24

18~4° No, 10102°. Wo

Guerrero, Mexico

h about 93 km

Magnitude 4.8 (CGS)&

September 28

D z iP 00:45:30.2 c C&GS card 79-65:

23:47:40.7

59.70 N., 143.4° w.

Gulf of Alaska

h about 19 km

Magnitude 5.25-5.5 (Brk),

6.25-6.5 (Pal),

4.8 (CGS),

6.1 (HVO).

M

"MP

U

U

U

U

U

Z iP

Z eP

PEN is

PEN eSB

PEE eL

PEN eG

PEZ iR

05:15~5001 c , 48.7 c

05~23:12

05:26:46

05:27:48

05:28:04

05:30:24

C&GS card 77-65:

05~06:36.8

28~00 S., 17801° w.

Kermadec Islands

h about 33 km

Magnitude 605-6o75'(Pas),

6.25-6.5 (Brk),

6.5-6.75 (Pal),

502 (eGs),

6.4 (HVO).

September 30

M

U

U

U

M

A

D

MP

·u

Pa

Hi

Ha

Z eP

PEZ eS

PEE eG

PEZ iR

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z rrmax

Z Tmax

23:55=3401 c OO~01:58

00:04:32

00:06:38

00:39:00

05

07

07

04

01

00:38:57

OO:37~42

32
The following persons or agencies reported "felt" earthquakes

during the 3d quarter, 19650 Their assistance is gratefully acknowledged ..

Mauna Loa summi,t area

Mauna Loa Observatory

Kilauea summit area

Mr .. and MrS3 HQ W.. Mist

Mrs u Vv Hansen

Mrs .. Mo Gorder

Mro J~ Loucks

Mro & ~~Sv Co Ko Wentworth

Mro K" Yamamoto

Mro Jo Forbes'

Mr~ Ao Y'amamoto

Mr" B" Decker

Mrs.. N. Yamamoto

Mis s Mo English

Mrs .. L" Forbes

Mr. Ro Koyanagi

North Hawai.i

Mrs 0 Eo Christensen

Mrs.. R" Eklund

Kona

Miss Ao Greenwell

Mrv E~ Glass

Mro Mo Sutherland

Radio station KEKO

Kau

~o Wo Meinecke

Mro Do Irhompson

Mrs" A. Paiva

Naalehu Police Station

Pahala Hospital

33

Hila region

Mr. and Mrs. R. Baldwin

Mrs. H~ Lewis

Mrs .. To Crabb

Mr" B~ Allen

Miss E.. Patten

Mrs. Brown

'Mrs" Veriato

Civil Defense Office

Mrs" McPearson

Mr. H. Pierce

Mrs" Uyetake

Mrs. J. Bryan

Mrs 0 Ro Kaneshiro

Radio station KIPA

Mro and Mrs 0 R. Okamura

Puna

Mrs. Wilson

Miss H. Hoopai

Miss RD Chiquita

Mrs" Carmichael

Haleakala, Maui <

Mr. J" Larson
UNITED STATES

DEPARTMENT OF TRE INTERIOR

GIDLOGICAL SURVEY

HAWAIIAN VOLCANO OBSERVATORY

SUMMARY 40

October, November, and Decemoer, 1965

By Robert Y. Koyanagi, Arnold T. Okamura,

and Howard A. Powers

Issued February 1969

OBSERVATORY STAFF

Geology

R. S. Fiske (Arrived Oct. 18, 1965)

H. A. Powers (Scientist in charge)

Geophysics

D. P. Hill

W. T. Kinoshita

George Kojima

R. Y. Koyanagi

A. T. Okamura

Geochemistry

R. T. Okamura

T. L. Wright

Support

~. T. Endo

J. C. Forbes

W. H. Francis

Yukie Kimura

B. J. Loucks

Akira Yamamoto
CONTENTS

Page

Summary of activities----------~------------------------------ 1

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

Seismic summary------~--------~-------------~----------------- 6

Acknowledgments----------------------------------------------- 6

Publications of special,interest and HVO contributions, 1965-- 29

Illustrations

Figure 1. Index map of the Island of Hawaii------------------ 2

2. Tilting of the ground around Kilauea caldera

between Sept. 4, 196~ and Jan. 5, 1966----------- 5

Tables

Table 1. Tilt coordinates at Uwekahuna----------------------- 3

2. Tilt coordinates and changes at bases around

Kilauea caldera----------------------------------- 4

3. N~mber of earthquakes and minutes of tremor

recorded on seismographs around Kilauea caldera--- 7

4. Local earthquakes recorded by se~smographs of the

U.S. Geological Su~vey-----~---------------------- 11

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

i
Summary of Activities

Kilauea volcano continued its gradual inflation throughout much of

the fall quarter of 1965. As monitored by daily readings of the shortbase water-tube tiltmeters at Uwekahuna, the center of inflation lay to

the southeast, just east of West, Pit which is in the southwestern part

of Kilauea caldera. Seismic activity remained at a normal level,

punctuated by two small swarms of long-period quakes from beneath

Kilauea summit an'd one swarm of 50 quakes from the 'east rift zone in

mid -November.

These fairly normal conditions were abruptly interrupted by a

6-hour eruption on December 24 and 25. About 1.1 million ,cubic yards

of lava were erupted from 2 reaches of en echelon fissures on the east

rift zone of Kilauea extending from Aloi Crater, (which is midway

between Ahua and Makaopuhi seismograph stations (fig. 1)), to Kane Nui

a Ramo, a small lava and cinder cone about 4 km farther east. There was

little prior warning of this activity-'-harmonic tremor and a swarm of

quakes began at about 19:30 on December 24 and by 21:30 on the same

evening the lava reached the surface.

The lava erupted from vents crossing the floor of Aloi.Crater and

formed a 47-foot-deep lava lake, but late-stage drainback withdrew all

but 5 or 6 feet of this new lava.

The eruption ended as the tempo of earthquakes and ground cracking

reached the maximum. The ,seismic crisis produced hundreds of felt

quakes and thousands were detected instrumentally.' This swarm

continued with gradually decreasing intensity into mid-January 1966.

The epicenters of most of the quakes as well as the location of most of

the new ground cracks lay along the upper east rift zone and westward

along the Koae fault system, a system that lies roughly between Makaopuhi

and Desert seismograph stations (fig. 1), for a distance of about 15 km.

Studies in Makaopuhi lava lake, near·Makaopuhi seismograph station,

continued throughout this quarter. A number of samples of molten basalt

were obtained from beneath the crust of t.he lake at temperatures ranging

from 1,100° to 1,120°C. Modal studies of these melt samples as well as

of samples from other levels in the crust of the lake indicate the

following paragenesis of the main crystalline phases: olivineclinopyroxene-plagioclase-opaque minerals.

Investigations of the partial pressure of oxygen are continuing in

the Makaopuhi lava lake drill holes. Five drill holes now show zones of

anomalously high P02 (up to 10-5 atm) within the temperature range

r(50° -450°C. The maxima of these anomalies moved deeper in the holes as

the isotherms moved to greater depth. The explanation of these anomalies

is still being explored.

1
EXPLANATION

• Seismograph Station

o Town or locality

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

by the U.S. Geological Survey, principal settlements, qnd selected

geologic features. Epicenters of local earthquakes are given in

table 4 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 at Uwekahuna (table 1), and at irregular intervals

it is measur.ed on a regional,. scale by means of a network of field tilt

bases and a portable water~tube tiltmeter (table 2). The attitude of

the ground surface at.eachtilt base is reported in terms of north-south

and east-west tilt coor~in~tes. Both coordinates at each station were

arbitrarily set equal to 500 when measurements at that station were

begun. Increasing tilt coordinates correspond to northward and

eastward tilting of'the earth's ,surface; that is, to a relative

subsidence toward the north and east.. A one-unit change in coordinate

corresponds to a tilting of 1 microradian (1 mm per km) in the direction

indicated.

Location of and essential data on each tiltmeter station are

listed in table 7 of summary 37, which covers the first quarter of 1965.

Table l.--Tilt coordinates at Uwekahuna z October,

November, and December, 1965

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

(1965 ) (1965)

October 2 473' 479 Novemb~r 20 471 473

9 474 478 27 471 471

16 474 478 December ,4 470 468

23 474 476 11 471 467

30 474 474 18 471 467

November 6 475 474 25 467 498

13 474 475,

3
4th Quarter, 1965

Table 2.--Tilt coordinates and changes at bases around Kilauea caldera.

(See tilt diagram, fig. 2.)

.6 4

Rate (10- rad/mo) Date of

and direction of last

Tilt Date Tilt coordinates tilting since reading

base (1965) N-S E-W last reading (1965)

Uwekahuna (U) Dec. 27 454.6 502.1 1.6 S. 38.0° E. Sept. 9

Tree Molds (TM) 29 427.7 52·3.9 2.3 s. 36.4° E. 2

Sand Spit (SS) 30 858.8 738.2 1.46 S. 48.6° E. 7

Kalihipaa (Kal) This station ruined during the eruption and earthquake

swarm of Dec. 24-3'1, 1965.

Keamoku (Kea) Dec. 28 592.7 494.5 .2 N. 38.9° E. Aug. 30

Ahua Kamokukolau 28 662.3 532.5 11.2 N. 6.0° E. 30

(Kam).

Kipuka Nene (KN) Jan. 13 293.5 500.9 8.4 S. 1.3° w~ 31

(1966)

Hilina Pa1i (HP) 10 463.4 507.7 1.2 s. 20.6° E. June 9

(1966) .

Kapapala Ranch Dec. 27 492.7 508.4 .54 N. 7.2° E. Sept. 1

(Kap ).

Mehana (M) 29 541.3 547.8 · 3 N. 28.1° E. 9

4
1 M

Kea

0

0

"

<)

• Kat

lKN

'2)C

;

t----4

TILTIH,G RATE 5.0)( 106 RADIANS I MONTH

SEPT 4, 1965 .. JAN 5, 1986

• •

5KM

2000

Figure 2.-~Tilting of the ground around Kilauea caldera, September 4, 1965-

January 5, 1966. 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 basesj open circles,

short-base water-tube tiltmeters. See table 2 for explanation of

abbreviations.

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 lea~t 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 determ~ned by analysis of records

obtained d~ily at the Observatory (stations U, M, A, D, N, WP, MP).*

Earthquakes of magnitude 2.0 or greater are ge~erally sufficiently

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

individually in table 4. Data op'identifiable phases from distant

earthquakes are listed in table 5.

Acknowledgments.--Several people or agencies reported "felt"

earthquakes during the fourth quarter, 1965. Their assistance is

gratefully acknowledged.

*Location of and es.sential data on each seismograph: station are

listed in table ,'6 of summary 3'7~ 'which covers.. the first quarter of 1965.

6
Table 3. --Numbers of earthquakes and minutes of tremor recorded on seismograph

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

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

amplitudes on seismographs in the summit region. Unless otherwise tremor is presu

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

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

Kilauea- summit region, and shallow earthquakes in the Kilauea caldera region; shallow 

the SW. rift zone of Ki·lauea· and the adjacent portion of the Kaoiki fault system; earthqua

eastern half of Kilauea's east largely on the Pahoa- seismograph; earth

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

other regions: Kana, Mauna Kea, etc.

------ - - ---

..

-- ---

Other

-----------------

1 off south shore 

1 off NW. shore o

-----------------

- - 

1 Mauna Kea

-----------------

1 off SW. shore o

1 Kohala 

1 off SEe shore o

1 Kana, 1 Mauna K

1 off south shore 

31 Mauna Loa

5-

14

7

11

6

10

10

4

10

11

3

14

19

14

10

7

Earthquakes

Eastern Upper

east east

rift rift

4

7

8

2

3

5

-5

8

9

6

1

8

4

2

7

5

70

59

80

120

47

33

20

32

30

39

5

32

32

27

55

65

4

4

2

2

1

2

2

1

2

4

2

16

5

6

6

3

7

22

9

7

30

Deep

Tremor

t--

__(.;...i_n_ffi_l_"n_u_t_'e-:-s--:-) -+K_i_l_a_u_e-:a_s_umm __i_t---tSW• rift

Inter- and 30 km Shallow mediate Shallow Kaoiki

Oct. 1

2

3

4

5

6

7

8

9

1011

12

13

14

1516

Date

(1965)
ex>

o

N

Table 3. --Numbers of earthquakes and minutes of recorded on seismograph

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

Tremor Earthcuakes

Date in minutes.} Kilauea summit SW. rift Eastern Upper Inter- and east east Other

(1965) Deep mediate Shallow 30 km Shallow Kaoiki rift rift

ct. 17 ---- 2 ------ ----- 52 7 ----- 7 21 Mauna Loa

18 ---- 5 ------ 1 7 6 ----- 8 30 Mauna Loa

19 ---- ------ ------ 2 40 1 1 2 10 Mauna Loa, 1 H

20 ---- 7 ------ 10 55 8 ----- 3 -----------------

21 ---- 4 8 5 58 6 ----- 12 1 Mauna Loa

22 36 ------ ------ 2 40 6 ----- 11 -----------------

23 ---- ------ ------ 2 48 9 ----- 11 1 Kona

24 ---- ------ 3 3 52 8 ----- 8 3 Mauna Loa

25 ---- 210 ------ ----- 90 12 ----- 18 -----------------

26 ---- 18 ------ 1 65 8 1 7 -----------------

27 ---- 5 ------ 4 74 2 2 8 -----------------

28 34 ------ ------ 5 98 9 ----- 9 1 Kana

29 ---- 8 ------ 1 67 7 1 5 -----------------

30 ---- 8 ------ 2 80 10 ----- 12 -----------------

31 17 ------ 7 3 65 6 ----- 17 1 Mauna Loa

ov. 1 ---- 21 ------ 3 53 3 ----- 5 -----------------

2 ---- 12 ------ 1 64 6 ----- 3 -----------------

3 ---- 18 ------ 1 69 7 1 l2 -----------------

4 ---- ------ ------ 2 67 5 1 10 -----------------

5 ---- 10 ------ 3 72 5 ----- 7 1 off SEe shore o

6 ---- 9 ------ 3 74 5 ----- 6 2 Mauna Kea

7 ---- ------ ------ 1 70 4 ----- 7

8 ---- 6 ------ 4 80 2 ----- 6 -----------------

9 ---- 20 Severe electrica,1 storm--instrumenJs turned off

10 ---- 46 ------ ----- 110 6 5 10 -----------------

11 ---- 20 ------ 4 96 6 4 13 -----------------

12 ---- 50 ------ ----- 54 3 1 26 1 Kana

13 ---- ------ ------ 3 79 3 1 70 -----------------

14 ---- .... ----- ----*-- 1 106 10 5 9 1 Mauna Loa
Nov. 15

9 ------ 1 68

6

6

9 1 Mauna Loa

16 ------ ------

3 36

5

4

5 - - - - - -- - - -- -- - _.- - 

17

5 ------

4 56 11

9

9 1 off SEe shore o

18 ------ ------

4 46

6

7

6 1 off SEe shore of 

19

9 ------

3 45

3

6 11 ------------------

20 ------ ------

2 53

5

6 ------------------

21 ------ ------

3 31

6

5 ------------------

22 ------ ------

7 60

6

9 ------------------

23

7

5 24 101

5

5 1 Mauna Kea, 2 Kan

24 ------ ------

6 150 2 7

25 ------ ------

5 142

3

4

26 --- - -- ------

4 135 2 6 ------------------

27

3 ------ 1 115

9

7 1 off SW. shore o

28 15 ------ ------

6 112

9

2 10 -----------------

29.

6 ------ ------ 2 i45

5

5 -----------------

30 ------ ------

6 200

6 -1 13 1 'Mauna Kea

Dec. 1 ------ ------

6 159.-

2 1 20 -----------------

\D "2 ---- ------ ------

2 55

3 20 1 off east shore o

3 32 ------ ------

3 56 ·4 1 31 -----------------

-4 ------ ------ 2 58

9 2"6 -----------------

5 21 -.. ------

3 50

3 22 1 Mauna Loa

6 ------ ------

3 44

5 -----------------

"7 ------ ------ 1 55

3 1 19 1 Mauna Loa, 1 Kan

8-

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

3 70

3 1 10 -----------------

9 15 ------ ------

3 95

8

3 -----------------

10 -------- ------

2 60 "9

2 12 -----------------

11 ------ - -"----

4 72 13

4

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

12 ------ ------

2 63

6 1 7 1 Mauna Loa

13 ------ ------

6 60

6 1 4 1 Mauna Kea

14 38 ------ ------ 2 36

3 1 7 ------------------

15 ------ ------

2 36

3

6 -----------------

16 ------ ------ 42

6 10 1 off west shore o

17 ------ ---_ ... - 2 30 2 1 13 1 off NW. shore o

18 ------ ------ 2 36

5 10 ------------------

19 ------- ------

3 43

5

5 ------------------

20 ------ ------ 14 80 10 1 off west shore o

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

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

Tremor

(in minutes)

InterDeep mediate Shallow

Kilauea summit

30 km Shallow

sw. rift

and

Kaoiki

Earthquakes

Eastern Upper

east east

rift rift

Others

6

3

8

308

232

210

15

6

14

lO

19

12

lOt

17+

14+

8.0

100

93

3

3

2

10

9

3 4

19

21 ----

22 ----

23 ----

24

251

26 Eruption at Alai Crater. Harmonic tremor and seVE ral thousands of earthquakes occur

27 the southeast and south flanks of Kilauea, along the upper east rift and Koae faul

28...

29 ----

30 ----

31

Dec.

t-'

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

October, November,and December, 1965

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

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

occurring on or near the island of Hawaii are included in the ·list.

Date Time Magni- [)epth Epicenter 

(1965) h m s tude (krn) Lat. N. Long. w. Description 

- - -

Oct. 1 02 13 27.4 2.2 9 19° 18.5' 155°10.7' 6 km south of Makaopuhi seismomete

3 09 10 33.6 2.7 8 18° 30. '0' 155°28.5' 63 km SSE. of Naalehu 

4 22 25 33.1 3.2 13 20° 09' . 156°22'. 48 km wsw. of Mahukona 

8 04 50 34.5 2.2 8 19°'17.5' J 155° 10.1' 8 km SSE. of Makaopuhi seismometer 

8 14 38 29.6 2.5 5 19°24.8' 155°26.8' Kaoiki fault system 

9 22 07 47.1 2.0 5 19°25.6' 155°25.7' ---do----------------------------- 

9 06 20 18.9 2.2 <3 19°53.9' 155°38.7' 16 km SSE. of Kamuela 

12 12 57 01.8 2.7 8 19°15.0' 156°01.3' 20 km SW. of Hookena 

13 06 46 59.2 2.2 8 19°17.2' 155°08..7' 10 km SSE. of seismomete

13 09 38 48.5 2.4 40 19° 09.. 8' 155°24.3' 19 km ssw. of Desert seismometer 

13 14 34 24.9 2.7 8- 20°10.0' 155°36.4' 17 km NE. of Kamuela 

14 01 57 36.5 2.3 8 19°18.0' 155° 12.5' 8 km SW. of Makaopuhi seismometer 14 05 49 16.2 2.1 8 19°16.0' 155°08.6' 12 kmSSE. of Makaopuhi seismomete14 16 27 37.1 3.1 13 . 20°19' 156°12' 50 km SSE. of Haleakala seismomete

15 11 36 51.1 2.8 50 19°10.5' 155°28.9 1 2 km SSW. of Pahala 

15 11 40 00.9 3.0 50 19°08.7' 155°26.0' 8 km SE.of Pahala 

15 21 04 01.9 2.3 3 19°28.0' 155°47.1' 15 km ESE. of Kealakekua 15 21 52 26.4 2.5 8 19°56.4' 155°27.5' 13 km ENE. of Keanakolu 

16 06 06 59·5 3.7 8 18°38.2' 155°31.7' 48 km SSE. of Naalehu 

17 20 59 28.5 2.3 8 19°26.1' 155°36.6' 8 km SW. of North Bay seismometer 

17 21 23 49.7 2.4 9 19°26.1' 155°35.4' 6 km ssw. of North Bay seismometer 17 22 40 09.6 2.4 6 19°27.8' 155°38.5' 7 km wsw. of North Bay seismometer 

18 20 51 29. 6 2.0 9 19°28.1' 155°30.6' 8 km ESE. of North Bay seismometer 

19 06 15 44.5 2.2 8 19°26.0' 154°56.1' 7 km SSE. of Pahoa 

20 05 50 52.0 3.2 30 19°22.4' 155°18.7' Beneath Kilauea summit 

- --_ ....... _ .....- -- .....',,"- .....- -

-

_

..

•

.. r ....- _ • . . -

...

"

-.

-

.. --.- .

-

---

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

October, November, an1 December, 1965--Continued

Date Time Magni- Depth Epicenter 

(1965) tUde (km) Lat. w. Description

h m s N. Long. 

- - -

Oct. 20 18 32 15.8 2.4 30 19°21.7' 155°19.5' Beneath Kilauea summit 

21 06 46 48.6 2.3 5 19°13.5' 155°36.3' 17 km NNW. of Naalehu 

21 08 56 33.2 2.4 50 19°47.3' 155°46.0' 8 km ENE. of Puu Waawaa 

21 11 49 58.4 2.4 9 19°18.2' 155° 08.5' 9 km SEe of Makaopuhi seismometer 

21 15 28 57.8 2.0 30 19°11.1' 155°20.0' 17 km SSE. of Desert seismometer 21 16 14 42.6 2.2 8 19°17.6' 155°09.0' 8 km SSE. of Makaopuhi seismomete

21 16 15 01.9 2.4 9 19°17.6' 155°08.6' 9 km SSE. of Makaopuhi seismomete

22 03 11 17.3 2.2 8 19°21.1' 155°01.1' 5 km west of Kalapana 

22 23 07 32.5 2.6 8 19°17.0' 155°07.3' 11 km SEe of Makaopuhi seismomete

23 05 58 05.2 2.3 8 19°17.,0' 155°07.5' 11 km SEe of Makaopuhi seismomete

23 08 48 06.9 2.5 8 19°18.9' 155°47.9' 14 km SEe of Hookena 

23 20 45 50.5 2.0 8 19°22.3' 155°02.3' 7 km WNW. of Ka1apana 

24 12 58 59·7 2.5 8 19°11.7' 155°35.3' 14 km north of Naalehu 24 14 53 47.6 2.3 3 19°10.2' 155°34.5' 12 km north of Naalehu 

24 21 50 08.6 2.6 <3 19°26.2' 155°36.5' 7 km ssw. of North Bay seismomete

25 00 20 03.2 2.4 8 19°21.8' 155° 02.9' 15 km east of Makaopuhi seismomet

28 04 55 01.6 2.0 8 19°22.1' 155°29.9' 13 km WNW. of Desert seismometer 28 09 48 24.8 3.3 3 19°29.9' 155°48.0' 13 km ESE. of Kealakekua 

28 10 19 40.2 2.2 30 19°22.8' 155°18.4' Beneath Kilauea summit 

28 17 47 02.9 2.7 30 19°22.2' 155°19.4' ---do----------------------------28 17 58 30.9 2.0 30 19°22.2' 155°19.4' ---do----------------------------28 23 46 34.6 2.4 5 19°24.8' 155°27.3' Kaoiki fault system 

30 22 25 05.9 3.3 10 19°16.4' 155°07.1' 12 km SEe of Makaopuhi seismomete

30 22 31 35.6 2.3 10 19°17.0' 155°06.8' 11 km SEe of Makaopuhi seismomete

31 01 04 43.3 2.3 10 19°17.6' 155°08.5' 8 km SEe of Makaopuhi seismometer 

31 12 20 04.5 2.2 8 19°21.0' 155°03.1' 14 km ESE. of Makaopuhi seismomet31 19 22 45.5 2.7 10 19°24.6'. 155°29.6' Kaoiki fault system 

31 21 10 04.7 2.4 13 19°25.5' 155°35.6' 8 km ssw. of North Bay seismomete

Nov. 3 20 17 25.5 2.4 5 19°25.0' 155°26.4' Kaoiki fault system 

4 00 44 47.0 2.2 10 19°19.2' 155°07.9' 7 km SEe of Makaopuhi seismometer 
Nov.

5 02 24 13.0 2.4 10 19°19.2' 155°07.2'

7 km SEe of Makaopuhi seismometer 

5 19 31 58.3 2.7 40 18° 58.1' 154°57.9' 42 km south of Kalapana 

6 00 07 44.6 2.7 30 20°06.5' 155°47.5'

8 km WNW. of Honokaa 

6 07 34 30.8 2.8 13 20°00.9' 155°22.2' 14 km WNW. of Laupahoehoe 

7 06 54 33.3 2.5· 40 19°14.8' 155°25.2' 1·1 km SSW. of Desert seismometer 

7 12 34 02.4 2.5

8 19°16.8' 155°12.2' 10 km SSW. of Makaopuhi seismometer 

8 °00 48 35.0 3.4 37 19°24.5' 154°50.0' 16 km SE.of Pahoa 

8 17 57 41.2 2.2 30 19°22.2' 155°18.1' Beneath Kilauea summit 8 21 48 05.1 2.0

8 19°19.4' 155°04.4' 13 km ESE. of Makaopuhi seismometer 

10 13 45 53.5 2.3 10 19.°23.9' 154°53.9' 11 km SSE. of Pahoa 

11 16 19 15.6 2.4 3 19°25.8' 154°56.3'

7 km south of Pahoa 

12 17 35 49.3 3.4

6 19° 12. 9' 155°12.4' 5km ssw. of Apua Point 

12 17 39 10.3 2.5

5 19°14.7' 155°11.9 1 14 km ssw. of Makaopuhi seismometer 

12 18 10 43.4 2.1 3 19°15.0' 155°13.4' 14 km SW. of Makaopuhi seismometer 

12 18 20 40.4 2.4

8 19°15.8' 155°13.3' 12 km SW. of seismometer 

12 21 51 55.7 2.7

8 19°32.7' 155° 52. 4'

6 km ENE. of Kealakekua

13 06 29 30.5 2.5

8 19°12.7' 155°27.3' 3 km NE. of Pahala 

13 07 28 45.3 2.5

8 19°16.3' 155°10.4 1 10 km south of Makaopuhi seismomete

.13 07 29 01.8 3.2 3 19°13.9' 155°09.8' 15 km SSE. of Makaopuhi seismometer 

13 07· 50 59·3 3.2

6 19°14.3' 155°11.8 1 15 km ssw. of Makaopuhi seismometer 

13 12 02 22.2 2.5

8 19°15.2 1

w 155°12.3' 13 km SSW. of Makaopuhi seismometer 

14 17 29 19.9 2.1

8 19°24.0' 155°25.1' Kaoiki fault system 

16 12 44 51.1 2.0 20 19°23.3' 155°18.2 1 Beneath Kilaueaosummit 

17 04 14 42.0 3·0 10. 19°22°.8' 155°27.8' Kaoiki fault system 

17 06 16 59.9 3.7 13 20° 55' 157°50' 40 km south of Diamond Head, Oahu 

18 20 28 59.2 3.3 13 20°54' 1-57°50' 41 km south of Diamond Head, Oahu 

19 11 28 28.5 3.1 3· 19°25.7' 154°52.9' 10 km SEe of Pahoa 

2i 20 36 30.4 2.5

8 19°19.1' 155°08.1'

7 km SEe of Makaopuhi seismometer 

22 18 42 56.2 2.0 25 19°23.8' 155°18.6' Beneath Kilauea summit 

23 09 09 59.3 3.9 30 19°22.8' 155°19.7' Beneath Kilauea summit 23 11 08 38.8 2.7 30 19°22.2 1 155°18.2' Beneath Kilauea summit

23 13 04 10.2 2.6

5 19°18.7' 155°30.0' 12 km WSW. of Desert seismometer 

23 14 16 19.9 2.0 30 19°22.2' 155°18.2' Beneath Kilauea summit 

23 18 30 19.3 2.6

8 19°48.8' 155°31.6'

7 km north of Pohakuloa 

23 20 30 22.4 2.7 3 19°18.4' 155°48.7' 13 km SEe of Hookena 

25 03 37 16.3 2.2 25 19°23.9' 155°18.3' Beneath Kilauea summit 26 00 09 13.6 2.5

8 19°25.6' 155°28.8' Kaoiki fault system 

27 09 51 21.8 2.9 13 19°05.5' 156°19.5' 45 km WSW. of Milo1ii 

29 07 49 26.1 2.3 32 19°22.2' 1155°15.7' Beneath Kilauea Summit
Table 4. --Local earthquakes recorded by seismographs of the U.S. Geological Su

October, November, and December, 1965--Continued

Date Time Magni- Depth Epicenter 

(1965) h m s tude (km) Lat. N. Long. w. Description 

- - -

Nov. 29 15 44 45.0 2.1 30 19°23.5' 155°18.7' Beneath Kilauea summit

30 19 09 53.0 2.0 30 19°21.6' 155°19.6' ---do-----------------------------

30 19 38 13.8 3.3 13 19°58.1' 155°39.5' 8 km SSE. of Kamuela 

Dec. 1 21 02 47.7 2.1 8 19°20.7' 155°09.4' 3 km ESE. of Makaopuhi seismometer 

2 02 37 17.7 3.8 45 19°46.7' 154°56.4' 17 km ENE. of' Hila 

3 04 13 19.0 3.3 10 19°22.2' 155°27.1' Kaoiki fault system 

4· 07 49 06.3 2.2 25 19°25.,1' 155°16.3' Beneath Kilauea summit 

4 16 18 27.8 2.3 5 19°22.0' . 155°30.0' Kaoiki fault system 

5· 19 05 08.5 3.8 30 19°35.2' 154°57.8' 10 km NNW. of Pahoa 

5 21 08 39.6 3.5 8 19°11.6' 155°38.6' 16 km NNW. of Naalehu 

6 08 22 08.3 3.0 25 19°22.8' 155°17.5' Beneath Kilauea summit 

7 00 00 08.8 2.6 9 19°20.8' 155°06.0' 9 km ESE. of Makaopuhi seismometer 

7 02 29 02.4 2.5 5 19°13.1' 155°42.6' 21 km NW. of Naalehu 

7 22 48 31.8 2.5 5 19°43.1' 156°08.0' 7 km wsw. of Keahole Point 

8 21 41 00.8 2.2 8 19°21.1' 155°05.6' 9 km ESE. of Makaopuhi seismometer 

12 09 18 47.1 2.6 8 19°24.9' 155°25.3' Kaoiki fault system 

12 14 12 31.3 2.8 8 19°22.1' 155°27.9'

12 15 35 50.8 3.0 13. 155°37.0' 10 km SSW. of North Bay seismomete

13 10 01 36.6 2.6 3 19°55.7' 155°50.0' 18 km SW. of Kamuela

15 10 43 13.8 2.3 8 19°26.2' 155°25.2' Kaoiki fault system 

16 22 18 55.4 , 2.0 8 19°23.1' 155°24.9' 16 01 18 36.7 2.5 13 190 27.9' 156°04.9' 18 km WSW. of Kealakekua 

17 17 42 53.0 3·0 13 20°06' 156°26' 77 km wsw. of Mahukona 

19 17 31 05.2 2.1 25 '19°23.0' 155°15.8' Beneath Kilauea summit 

20 10 20 56.0 '2.7 8 19°52.0' 156°04.0' 15km north of Keahole Point 

20 12 16 37.7 2.3 8 19°22.1' 155°25.8' Kaoiki fault system 

20 21 34 05.0 2.3 5 19°25.8' 155°31.7' 9 km SSE. of North Bay seismometer

21 15 49 19.6 3.2 31 lQ021. 5' 155°17.5' Beneath Kilauea summit 21 16 01 16.9 2·5 30 19°22.0' 155°18.7' ---do-----------------------------
3 km SW. of Ahua seismometer

10 km south of Desert seismometer

5 km wsw. of Ahua seismometer

5 km SW. of Ahua.seismometer

11 km SW. of Ahua seismometer

8 km SSE. of Desert seismometer

8 km SW. of Ahua seismometer

7 km ssw. of Ahua seismometer

8 km east of Desert seismometer

3 km west of Makaopuhi seismomete

5 km SW. of Ahua seismometer

6 km SW. of Ahua seismometer

8 km ssw. of Desert seismometer

4 km SW. of Ahua seismometer

3 km _SW. of Ahua seismorne-ter

13 km ESE. of Makaopuhiseismom.et

4 km SW. of Ahua seismometer

17 km SE. of Desert seismometer

5 km SW. of Ahua seismometer

8 km SW. of Ahua seismometer

5 km SW. of Ahua seismometer

6 km SW. of Ahua seismometer

8 km south of Ahua seismometer

4 km SW. of Ahua seismometer

Near Makaopuhi seismometer

15 km SW. of Apua Point

4 kmSW. of Ahua seismometer

155°16.9'

155°23.7'

155°17.9'

155°18.4'

155°19.0'

155°21.. 8'

155°17.9'

155°16.4'155°18.8'

155° 12.1'

155°18.1'

155°19.0'

155° 16'.9'

155°16.4'

155°17.2'

155°03.8'

155°18.0'

155°17.9'

155°17.1'

155°19.0'

155°18.1'

155°18.6'

155°16.0'

155°16.8'

155°10.2'

155°16.9'

155°16.9'

19°21.2'19°14.5'

19°20.9'

19°20.7'

19°17.3'19°16.1'

19°18.0'

19°18.8'

19°20.2'

19°22.1'

19°20. 9'

19°20.8'

19°18:2'

19°2.1.7'

19°21.4"

19°21.0'19°12.3'

19°20.8'

19.°19.9'

19°20.7'

19°20.8'

19°18.5'

19°20.8'

19°21.8'

19°08.9'19°20.1'

1.5

55

5

3

5

5

5

3

5

3

3

5

5

3

5

5

5

3

5-

3

4

3

3

5

3

5

3.. 0

2.3

2.9

2.0

2.2

2.8

2.2

2.0

2.3

2.4

2.2

1·91.7

2.5

2.-'1

2.0

1.9

2.6

2.0

2.6

2.2

2.5

2.8

2.0

2.32.3

3.6

I I 1·1 I I 

The Aloi 'eruption of 1965.--During the very intense period of seismic activity from lat

to early December 28, several thousands of earthquakes occurred south of Kilauea caldera alo

west-trending Koae fault system, and along adjacent structures. About 300 of these earthqua

magnitude from

2 to 4.5. The many earthquakes which occurred during this time are not liste

in the usual manner.

Dec. 28 11 18 01.5

28 11 27 54.5

28 11 34 58.2

28 12 30 10.828 12 41 58.5

28 16 _18 15.4

28 17 45 44.528 18 43 15.2

28 20 51 27.3

28 22 22 07.8

28 22 24 44.2

28 22 3927.8

29 0'1 09 13.1

29-03 43 43.9

29- 0'4 30 19.

7

29 06 06 08.7

29 07- 12 12.0

29 07 48 00. 0 .

29 07 52 28.4

29 08 58 06.9

29 12 46 10.0

29 13 04 38.9

29 15 17 47.9'

29 21 14 59.8

29 21 24 46.9

29 22 13 19.0

30 00 10 55.330 00 47 46.0

30 00 53 42.7

30 02 14 23.8

30 03 03 29.5

2.2

2.1

2.4

3.1

3

o

1

8

19°21.1'

19°21.4 1

19°21.5'

19°18.9'

155°17.2'

155°17.7'

155°15.5'

155°11.3'

4 km SW. of Ahua seismometer

4 km SW. of Ahua seismometer

2 km SE. of Ahua seismometer

6 km south of· Makaopuhi seismomet
Table 4.--Local earthquakes recorded by seismographs of the U.S. Geological 

October, November, and December, 1965--Continued

Date Time Magni- Depth Epicenter 

(1965) h m s tude (km) Lat. N. Long. w. Description 

- - -

Dec. 30 10 45 39.5 2.2 0 19°21.9' 155°11.1' Near Makaopuhi seismometer 

30 12 21 27.4 2.8 3 19°20.6 ' 155° 16-.2 ' 4 ,km ssw. of Ahua seismometer 30 19 30 57.3 1·9 6 19°25.9 ' 155°25.2 ' 9 km SW. of Mauna Loa seismomete30 22 18 30.6 2.3 8 1550 17.. 9' 15,km sw. of Apua Point 

3-1 10 35 46.3 2.2 3 19°14.3' km south of Desert seismomete

31 10 56 20.1 2.0 8 19°15.0 ' 1550 22.7' 10 km SSE. of Desert seismometer 

31 20 02 04.1 2.7 5 19°07.8' 155°13.5' 15 km ssw. of Apua Point 

31 20 24 04.8 2.7 8 19°07.0' 155°14.6' 16 km ssw. of Apua Point 

31 20 28 02.0 2.0 5 19°20. 9' 155°18.1' 5 km SW. of Ahua 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, Summary 37. Magnitudes calculated from the Hawaii seismograms

are fol1o~ed by (HVO). Location of epicente,r, origin times, and focal

depths, and magnitudes, reported by other institutions are taken from

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

and Geodetic Survey.

C&GS card 77-65:

08:52:05.8 '

50.loN., 178.3°E.

Rat Islands, Aleutian Islands

Felt on Adak

h about 32 km

Magnitude 6.5 (Pas), 6.25-6.5

(Brk), 6.5-6.75 (Pal), 6.3

(eGS ), 6. 1 (lIvo).

October 1,' 1965

Oct. 1

C&GS card 77 -65:

10:46:16.7

52.6°N., 170.6°w.

Fox Islands, Aleutian Islands

h ab,out 22 km

Magnitude 5.3 (cGS).

14:54:09.0 c

10.4 c

11.4 c

10.5 c

11.4 c

15:01:13

15:05:09

15:07:25

15: 45: 14

iP

iP

iP

ep

eP

is

eG

iR

Tmax

"iP 10:53:09.0 c

Tmax 11:28:20

Oct. 3

M Z

D Z

MP Z

U Z

Pa Z

U PEE

U P~

U PEZ

Ha Z

Oct." 3

M Z

'Ra Z

08:59:15.5 d

16.7 d

16.5 d

16.8 d

12.8 d

14.6 d

14.8 d

09:05:08

09:07:14

09:09:12

~p" '

eP

eP

eP

eP

eP

eP

is

eG

e'R

z

z

z

Z

z

Z

,"Z

, PEE

PEN

. PEZ

M

A

D

MP

Ke

Hi

NB

U

U

U

M Z'

D Z

MP Z

U "Z

Pa Z

Na Z

Hi Z

Ke Z

Ha Z

-e'P

eP

eP

eP

eP'

,iP

eP

eP ,

iP

13:30:27.1 c

26.1 c

27.3 c

26.8 c

28.6 c

23.5 c

29.6 c

24.4 c

31.1 c

C&GS card 76-65:

14:45:26.8

49.5°N., 156.5°E.

Kurile Islands

h about 33 km

Magnitude 6 (Pas), 5.5-5.75

(Brk), .5.9 (eGs).

C&GS card 79-65:

13:22:28.5

20.00S.", 174.4°E.

New Hebrides Islands region

h about 553 km

Magn"itude 5.9 (Brk), 6.2 (eGs).

17
Table 5.--Distant earthquakes--Continued

M Z Tmax 04:54:11

A Z Tmax 11

WP Z Tmax 04:53:58

Pa Z Tmax 52

Ha Z Tmax 42

C&GS card 78-65:

03:35:59.6

12.6°N.) 114.5°E.

South China Sea

h about 17km

Magnitude 5.9 (cas).

C&GS card 80-65:

19:51:57

51.7°N.) 176. lOW.

Andreanof Islands, Aleutian

Islands.

h about 63 km

Magnitude 4.7 (CGS).

C&GS card 'T7-65:

04:12:49.1

44.0oN., 128.3°W.

Off coast of Oregon

h about 33 km

Magnitude 5.1 (CGS).

Oct. 7

5.3 (eGs).

07:12:24

28

28

03

07:10:15

13:48':14.1 c

13:54:01

13:56:17

13:58:03

14:27:03

14:26:56

14:27:01

14:26:36

14~25:26

Oct. 12

WP Z Trnax

U Z Tmax

Pa Z Tmax

Hi Z Tmax

Ha Z Tmax

C&GS card 79-65:

06:27:16.7

52.2°N., 174.8°w.

Andreanof Islands, Aleutian

Islands.

Felt on Adak

h about 17 km

Magnitude 5.1 (cas).

Oct. 12

Pa Z Tmax 15:44:12

Ha Z Tmay 15:42:34

C&GS card 81-65:

14:58:13.6

56.3° N., 154.00

w.

Kodiak Island region

h about 24 km

Magnitude 4.2 (CGS).

WP Z eP

U PEl\I eS

U PEE eL

U PEZ eR

WP Z Tmax

U Z Tmax

Pa Z Tmax

Hi Z Tmax

Ha Z Tmax

C&GS card 78-65:

13: 40: 55.9 .

56.3°N., 153·7°W.

Kodiak Island region

h about 11 km

Magnitude 5.25 (Brk),

Oct. ·12

20:35:14

03:48:44.7 d

45.0 d

45.~ d

eP

eP

eP

Tmax

Z

Z

Z

z

Oct. 7

Ha

M

A

MP

October 3, 1965

U PEZ iR 16:59:13

C&GS card 76-65:

16:14:54.9

42. 90S., 75.4°w.

Ofr coast of southern Chile

h about 28 km '

Magnitude 6-6.5 (Brk), 6.0 (cas).

Oct. 4

18
·,

Table 5.--Distant earthquakes--Continued

22 : 02-: 08. 7 c

08.2 c

08.5 c

22:11:55

22:12:53

22:17:05

22:22:01

22:22:28

22:25: 43

23:00:27.6 c

26.7 c

27.4 c

25.9 c

26.8 c

M· Z iP

A', Z eP

U Z eP

U PEE eS

U PEE iPPS

U PEZ eSS

U ~EE eL

U PEN, iG

U PEZ ' iR

C&GS ca'r'd 80-65:

21:50:04.5

1. lOS. , 127.9°E.

Halmahera

. h abo"U.t 33 km

Magn'itude 6.75 (Pas), 6.5-6.75

(Pal), 5.9 (CGS), 6.6 (HVO).

Oct. 18;

Oct. 18

M Z iP

A Z iP

D Z iP

MP Z iP

U Z eP

C&GS card 81-65:

22:50:41.9

15.7°N., 95.4°.w.

Near coast of Oaxaca, Mexico

h,a"bout 36 km

Magnitude 5.3 (CGS).

Oct. 19

M Z eP 20:56:25.0 d

'U i PEZ eS 21:02:38

U FEZ iR 21:07:15

Ha Z Tmax 21:38:01

C&GS card 80-65:

'20:48:47.4

52.3°N., 174.3°E.

Near Islands, Aleutian Islands

h about 48 km

Magnitude 5-5.25 (Brk), 5.75-6

(Pal), 5.6 (CGS), 6.0 (HVO).

02:03:07.3 c

07.4 c

05.'7 c

02.0 G

02: 18:23 .

08:34:23.6 c

23.8 c

22.7 c

~4.3 c

23" 5 c 22~4 c

October 15, 1965

U PEZ iR 00:57:38.

C&GS card 80-65:

00:34:09.3

8.5°N.,103.00W.

Off coast of Mexico

h about 33'km

Magnitude 4.75-5 (Brk) , 5.25-~.5 (P~'l), 5,2 (CGS).

Oct. 16

M z· iP

A Z iP

D Z eP

MP Z iP

U Z iP

NB Z eP

C&GS card 80-65:

08:22:56.1

3.1°N., 128.5°E.

North of Halmahera

h ,about 213 km

Magnitude 5.7 '(COO).

Oct. 17

M Z eP

A ,Z eP

D Z eP

Na Z" eP,

U PEZ eR

C&GS card 80-65:

01:53:42.7 . 8. OoS., 155.9°E.

Solomon Islands

h about 93 km

Magnitude 5.5 (CGS).

19
Table 5.--Distant earthqu~kes--Continued

October 20-21, 1965 Oct. 24

C&GS card 80-65:

06:00:48.5

53.8°N., 165.5°W.

Fox Islands, Aleutian Islands

h about 16 km

Magnitude 5.5 (CGS).

Oct. 24

18:23:49.9 c

50.6 c

50.9 c

18: 55: 01.5 c

01.9 c

21:17:02.8 c

01.7 c

02.5 c

02.5 c

03.7 c

04.8 c

01.7 c

21:16:59.9 c

M Z eP

D Z eP

C&GS card 81-65:

18:45:38.3

45.00N., 149.3°E.

Kurile Islands

h about 48 km

Magnitude 5.0 (cas).

Oct. 24

M Z iP

D Z eP

MJ? Z eP

C&GS card 80-65:

18:15:04.9

49. 7°N., 156.1°E.-

Kurile Islands

h about 30 km

Magnitude 5.7 (eGs).

Oct. 24

M Z eP

D Z eP

MJ? Z iP

U Z iP

Pa Z iP

Hi Z eP

NB Z eP

Ke Z eP

C&GS card 82-65:

21:.09: 44.3

17.7°S., l r8.5°W.

Fiji Islands region

h about 515 km

Magnitude 4.7 (eGs).

14:43:57.3 c

57.7 c

57.2.c

58.2 c

57.5 c

54.9 c

00:05:08.6 c

07.6 c

00:24:54

06:07:43.0 c

44.0 c

44.1 c

06:45:29

33

26

26

13

04

06:43:17

iP

iP

eP

eP

eP

eP

Z iP

Z iP

Z iP

Z. Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

Z Tmax

M Z eP

A Z iP

U PEZ eR

C&GS card 80-65:

23:54:29.9

12. 5°N., 87.4°w.

Near coast of Nicaragua

Felt at San Salvador

h about 70 km

Magnitude 5-5.5 (Brk), 5.75

(Pal), 5.4 (CGS).

Oct. 23

M

A

D

M

A

D

U

Pa

Hi

Ha

M' Z

A Z

D Z

MP ·.Z

U Z

Ke Z

C&GS card 85-65:

14:32:13.7

4. I ON., 125. 9° E.

Talaud Islands

h about 175 km

Magnitude 5.8 (CGS).

20
Table 5. --Distant earthquakes--Continued

October 25, 1965.

Pa Z Tmax 22:00:06

C&GS card 82-65:

21:19:50

44.5°N., 130. lOW.

Off coast of Oregon

h about 33 km

Magnitude 4.4 (CGS).

Oct. 29

00:57:14.3 d

13.5 d

12.6 d

13.8 d

13.6 d

15.4 d

16.1 d

12.9 d

.18: 11: 15. 9 c

15.8 c

19.3 c

16.0 c

U Z eP 01:50:50.7 c

Pa Z eP 49.0 c

Na Z iP 51.2 c

Hi ·z eP 49.7 c

NB Z iP 51.8 c

Ke Z iP 53.1 c

Ha Z iP 56.8 c

U PEZ ipP 01:52:58

U PEZ iPP 01:54:36

U PEE i8KS 02:00:18

M Z iP

A Z iP

D Z eP

MP Z iP

U Z eP

Fa Z eP

Hi Z iP

NB Z iP

C&GS card 83-65:

00:49:13.4

23.'7°8.,' 179.8°w.

South of Fiji Islands

h about 522 km

Magnitude 5.4 (cas).

Nov. 3

NP Z iP

MP Z iP

Hi Z iP

NB Z ,eP

~C&GS card 83-65:

18:03:09.6

24.1°S., 178.9°E.

South of Fiji Islands

h about 546 km

Magnitude 5.6 (CGS).

Nov. 2

21:07:17.4 c

18.3 c

18.3 c

18.9 c

18.1 c

19.2 c

19.9 c

16.8 c

17.0 c

12.7 c

14.8 c

05.1 c

21:47:17

40

21:44:53

'22:43.:38.5 d

39.6. d

39.1 d

39.7 d

39.1 d

40.4' d

39.5 d

38.8 d

28.5 d

22:45:38

22:51:02

22:56:55

iF

eP

eP

eP

eP

eP

iP

eP

iP

eP

eP

iP

Tmax

Tmax

Tmax

M Z

A Z

D ·.Z

MP Z

U Z

Pa Z

Na Z

Hi Z

NB Z

Ka Z

Ke Z

Ha Z

M Z

A Z

Ha Z

M ZiP..

A Z eP

D Z iP

MP Z iP

U Z iP

Pa Z eP

Na Z eP

Hi Z eP

Ha Z eP

U PEZ iPP

U PEE is

U PEE iG·

C&GS card 83-65:

22: 34:24.3-

44.2°N., 145.3°E.

Hokkaido, Japan region

Felt in eastern and ~quthern

Hokkaido.

h about 180 km'

Magnitude 6.5 (Pas), 6-6.5 (Brk),

7-7.25 (Pal),. 6.2 (cas),

6.2 (HVO)•.

Oct. 28

21
Table 5. --Distant earthquakes--Continued

02:06:56

02:10:09

02:13:40

16:52:33.4 d

33.4 d

Nov. 3

Nov. 3

09:31:40.5 c

39.3 c

Nov. '5

U PEZ eR 19:30:20

C&GS card 83-65:

19:01:04.3

3.1°8., 143.8°E.

Near north coast of New Guinea

h about 31 km

Magnitude 5.7 (cas).

N'ov. 6

M ' Z iF . 06: 46: 27. 0 c

D Z iF 28.0 c

C&GS card 86-65:

06:38:41.5

60.6°N., 147.3°W.

Southern. Alaska

Felt at Anchorage

h about 37 km

Magnitude 5.2 (CGS).

Nov. 6

U . FEZ eR 09:24:30

C&GS card 87-65:

08:57:12.3

34.o0N., 138.9°E.

Near south coa$t of Honshu, Japan

h about 15 km

Magnitude 5,0 (cas).

Nov. 6

M Z iP

D Z iP

C&GS card 85-65:

09:21:48.6

22.1°8.,113;8°w.

Easter Island region

h about 33 km

Magnitude 6 (Pas), .6 (Brk) ,

5.5-5.75 (Pal), 6.2 (eGs).

18:31:00.9

18:30:59.4

59.6

57.6

18:39:06

18:47:50

M Z iP

A Z iP

C&GS card 86-65:

16: 41: 06. 1 '

4.7°8., 126.6°E.

Banda Sea

h about 450 km

Magnitude 5.7 (cas).

or

isSP

U PEZ iSS

U PEZ isGS

U PEN i

C&GS card 83-65:

01:39:02.5

9.1°8., 71.4°w.

Peru-Brazil border region

h about 583 km

Magnitude 6.75 (Pas),

6.75-7.25 (Brk), 6.25-6.5

(Pal), 6.2 (CGS)', 6.6 (HVO).

November .3, 1965-..Continued··

U PEN is '02:00:43

U PEE iSP 02:01:47

U PEE isPS 02:05:30

M Z eP

A Z eP

D Z iP

MP Z eP

U PE is

U PE iR

C&GS. card 83-65:

18:21:05.0

22.3°8., 114. lOW.

Easter Island region

h about 12 km

Magnitude 6.25 (Pas),

5.9 (Brk), 6 (Pal),

5.8 (CGS), 6.2 (RVO).

22
Table 5.--Distant earthquakes--Continued

02:41:08

03:28:16

03:32:08

November 11

01:42:00.5- c

01:41:59.6 c:

04:47:11.4 c

11.9 c

18:02:22.9 c

23.0 c

24.6 c

23.2 c

25.3 c

23.0 c

19.1 c

14.6 c

18:03:02

18:10:44

18:14:46

18:18:46

19:05:22

Nov.ember 12--Continued

C&GS card 90-65--Continued

Magnitude 5.25-5.5 (Brk) , 5.2 (eGs).

'Nov. 12

M Z iP

'D Z i.P

:ME' Z iF

U Z eP

Pa Z eP

Na Z eP

Ke' Z eP

Ra Z iF

U FEZ iPcP

U PEE is

U PEZ eSS

U PEZ iR

Ke Z Tmax

C&G8 card 84-65:

17:52:24.1

30.5°N.,140.2°E.

South of Honshu, Japan

h about 40 km

Magnitude 6.75 (Pas), 6.5 (Brk),

6-6.25 (Pal), 6.6 (cas),

6.8 (HVO).

Nov. 13

M Z iP

A Z iP

C&GS .card 84-65:

04:33:53.0

.43.8°N.. , 87.8°E.

Northern Sinkiang Province, China

h about 59 km

Magnitude 6.75 (Pas), 7 (Brk),

6.75-7 (Pal), 6.3 (CGS).

22 :08 : 57'. 1 c . 56.1 c'

U PEE iG

U PEZ eR

C&GS card 92-65: '

02: 51:25

60.7°~., 154.ooE.

West of Macquarie Island

h about 33 km

Magnitude 5'. 1 (CGS).

Nov. 12

U PEZ eR

C&GS card 85-65: .

02:04:19.5

56.0°8 •. , 121.5°W.

Easter Island' Cordillera

h about 33 km

Magnitude 4.9 (cas).

M Z eP

:ME' Z eP

C&GS card 88-65:

01:32:59.3

22.8°8., 172.6°E.

Loyalty Islands region

h about 62 km

Magnitude 5.4 (CGS).

November 9, ~965

M Z iP

D Z eP'

C&GS card 86-65:

21:59:04.3

22.3°8., 113.7°W.

Easter Island region

h about 33 km

Magnitude 5.2 (CGS).

Nov. 11

November 12

17:24:14.1 c

17:40:58

M Z eP

U PEZ . eR

C&GS card 90-65:,

17:14:27.6

30.4°N., 139.8°E.

,South ~f Honshu, Japan

h about 150 km

23
Tab'l~ 5. -!""Distant earthquakes--Continued

"07: 30: 06

07: 30: 57"

November 15,1965

Pa Z Tmax

Ha Z Tmax

C&GS card 88-65:

06:49:59

40.4°N., 125.8°w.

Off coast of northern California

h about 33 km

Magnitude 4.25 (Brk), 4.8 (cas).

Nov. 18

M Z iP 17:29:06.7 d

C&GS card 87-65:

17:17:23.1

7.1°S., 129.5°E.

Banda Sea

h about 208 km

Magnitude 5.4 (CGS).

Nov. 18

11:58:55

12: 14: 56

12:19:29

22:06:53.4 c

54.3 c

54.0 c

54.7 c

52.6 c

22:20:13

20:07:49.7 d

49.1 d

48.3 d

49.3 d

45.2 d

52.1 d

48.7 d

47.0 d

54.4 d

M Z iP

A Z iP

D Z iP

U Z iP

Na Z ~P

Hi Z iP

NB Z iP

Ke Z iP

Ha Z eP

C&GS card 87-65:

20:00:19.0

18.8°s., 177.9QW.

Fiji I$1ands region

h about 421 km

Magnitude 5.6 (CGS).

Nov. 18

M Z iP

A Z eP

D Z iP

MP Z iP

NB Z iP

U . PEZ iR

C&GS card 87-65:

21:58:12.4

53.9°N., 160.7°E.

Near east coast.qf Kamchatka

h about 12 km

Magnitude 5.5 (Pal), 6.0 (eGs).

Nov. 19

Nov. 15

U PEE iSS

U PEN eG

U PEZ eR

C&GS card 85-65:

11:18:49.9

0.3°8., 18. ,ow.

Central mid-Atlantic Ridge

h about 24 km

Magnitude 6.5 (Pas), 6.25 (Pal),

5.6 (CGS).

Nov. 16

U PEZ eR 16:09:51

C&GS card 85-65:

15:24:42.9

31. OON., 41. 5°W.

North Atlantic Ridge

h about 17 km

Magnitude 6.5 (Pas),

6.4 (Brk), 6 (Pal),

6.0 (CGS).

Nov. 16

MP Z iP 17:l7:o4.1 c

C&GS .card 86-65:

17:05:37.9

25.4°N .. ,125.2°E.

Southwestern Ryukyu Islands

U PEZ eR 07:33:10

C&GS card 91-65:

07:08:10.8

29.6°8., 178.6°w.

I

24
"

Table'5. --Distant earthquakes--Continued

15:~17:31.4 d

10:43:39.0 c

39.0 c

42.4 c

37.6 c

35.5 c

10:54:02

11:06:50

C&GS card 90-65:

01:17:31.2

3. OON., 124.8°E.

Celebes Sea

h about 45 km

Magnitude 5.6 (eGs).

Nov. 25

Nov. 27

U PEZ eR 03:30:59

C&GS card 91-65:

03:04:20.6

30.6°N., l40.2°E.

South of Honshu, Japan

h about 60 km

Magnitl1de 5'. 2 (CGS).

(Brk) ,

01:29:39.3 c

22:44:50.7 c

44.7 c

12:11:05.8 d

05.8 d

04.8 d

06.3 d

07.8 d

08.2 d

04.4 d

12: 18: 51

12:25:51

'Z eP

Nov. 23

NP

Hi Z iP

Ke Z eP

C&GS, card 88-65:

22:35:37.2

3. 90S., 150.3°E.

New Ireland region

h about 457 km

Magnitude 5.5 (CGS).

Nov. 27

M Z iP

A Z eP

D Z iP

MP' 'z iP

Pa Z eP

Hi Z iP

NB Z iP

U PEZ eS

U PEZ eR

C&GS card 89-65:

12:01:51.9

9. 70S., 159.7°E.

Solomon Islands

Felt at Honiara

h about 51 km

Magnitu~e 6.75 (Pas), 5.75

6.75 (Pal), 6.3 (CGS),

5.4 (HVO) .

M Z' e:P

C&GS card 87-65:

15:05:39.0

7. 3°S., 129.2°E.

Banda Sea

h about 132 km

Magnitude 6.1 (cas).,

Nov. 21

M Z iP

A Z iP

Hi Z iP

NB 'Z iP

Ke Z iP

U PEZ eS

U PEZ eR

C&GS card 88-65:

10:31:49.7

6.1°S., 130.4°.E.

Banda Sea

h about 93 km

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

6.3 (eGs), 6.4 (HVO).

November 19, 1965--Continued.

C&GS card 91-65--Con~inued

Kermadec Islands region

h about 33 km

Magnitude 6-6.25 (Pal), 5.0 (cas).

Nov. 20

Nov. 22

Ha Z Tmax' 14: 43: 47

C&GS card 87-65:'

14:00:27.0

52.00N., l'76.1QW. ,

Andreanof Islands, Aleutian Islands

Felt on Adak

h about 49 km

Magnitude 5.5 (cas).

Nov. 22

Ha Z Tmax 21:09:53

C&GS card 88-65:

20:25: 30. 4

5l.3°N., 179.8°w.

Andreanof Islands, Aleutian Islands

. h about 40 km

Magnitude 5.9 (CGS).

25
Table 5.--Distant earthquakes--Continued

C&GS card 90-65:

22:19:14.8

6.4°8., 146.3°E.

East New Guinea region

Felt widely

h about 109 km

Magnitude 6.4 (CGS).

Dec. 9

C&G8 card 90-65:

11:34:53.7

18.9°N., 107. lOW.

Off coast of Jalisco, Mexico

h about 37 km

Magnitude 6'.75 (Pas), 7-7.5 (Brk),

6.5-6.75 (Pal), 5.9 (CGS),

7.0 (RVO).'

Dec. 7

December 6, 1965

M z iP . 11:43:14.6 d

A Z eP 130 6 d

D Z eP 14.6 d

U PEN is 11:49:58

U PEN eG 11:53:14

M Z Tmax 12: 31: 16

A Z Tmax 11

D Z Tmax 30

MP Z Tmax 19

Pa Z Tmax 12:30:54

Na Z Tmax 12:31:01

Hi Z Tmax 12:30:56

NB Z Tmax 12:31:39

Ha Z Tmax 12:32:16

Z iP

PEN eS

PEZ eR

(CGS) ,

13: 45: 54

53

53

13:46:02

13:46:06'

15:07:47

15:10:09

11:01:13.5 c

13.9 c

14.6 c

13.7 c

13.3 c

11:08:39

11:13:38

11:16:08

Dec. 13

M Z eP

D Z eP

MP Z eP

U Z eP

Hi Z eP

U PEZ eS

U PEN eG

U PEZ eR

COOS card 92-65:

10: 52: 08.5 .

44.7°N., 150.1°E.

Kurile ~slands region

h about 35 km

Ma~itude 6 (Pal), 5.7

6.1 (avo).

Dec. 13

U . PEN eG

U PEZ eR

C&GS card 93-65:

14:46: 10.2

44.7°N., 150.2°E.

Kuri1e Islands' region

h about 33 km

Magnitude 5.4 (eGs).

Dec. 15

A Z Tmax

D Z Tmax

U Z Tmax

MP Z Tmax

Fa', Z ' Tmax

C&GS card 94-65~

12:09:36.4

57.00

S., 141:5°W.

South Pacific Cordillera

h about 33 km

06:16:56.8 d

06:24:20

06:30:54

22:29:34,:L c

28.9 c

iP

eP

z

z

Hi

Ke

D

U

U

C&GS card 92-65:

06:07:48.6

17.3°N., 100.00

W.

Guerrero, Mexico

Felt in southern Mexico

h about 57 km

Magnitude 6.25 (Pas), 6 (Brk),

6.25-6.5 (Pal), 6.0 (CGS),

5.8 (HVO).

26
Table 5.~-Dist~t earthquakes--Continued

December 15,1965 Dec. 22--Continued

57

48

29

18

12:22:25.7 c

26.2 c

25.6 c

20:55:31.4 c

21:07:32

M Z iP

MP .' z· iP

U Z eP

C&GS card 98-65:

12:10:31.4

3.2°N., '127.00 E.

Talaud Islands

h about 53 km

Magnitude 5.3 (CGS).

MP Z Tmax

U Z Tmax

Pa Z Tmax

Hi Z Tmax

C&GS card 94-65:

19:41:23.0

58.4°N., 153.00W. ~odiak Island region

Minor damage at Kodiak and

felt widely.. h about 50 km

.Magnitude 6.75-7 (Pas),

6.75-7 (Brk), 6.5 (CGS),

6.8 (RVO).

Dec. 23

Ke Z eP

U PEZ eR

C&GS card 94-65:

20:47:37.5

60.5°N., 141.00W.

Southeastern Alaska

h abou,t 33 km

Magnitude 5.4 (CG8).

Dec~ 28

19:48:45.4 d

46.2 d

46.1 d

45.6 d

44.9 d

49.0 d

42.9 d

45.6 d

45.2 d

19:50:11

19:55:07

19:57:41

19:59:27

20:28:38

58

51

23:13:58.7 c

58.2 c

58.0 c

23:14:00.9 c

02.3 c

'23:16:46.8 d

47. 3 d .

46.3 d

23:26:37

23:35:23

23:38:35

M Z iP

U Z eP

NB Z iP

Hi Z eP

Ha Z eP

C&G8 card 95-65,:

'23: 06: 42.4

17.5°8., 179. lOW.

Fiji Islands region

h about 573 km

Magnitude 5.5 (CGS).

A Z eP

D Z eP

MP Z eP

U PEN e8

U PEN eG

U PEZ iR

C&GS card 93-65:

23: 05:20.7

7. 5°N., 82. 2°W.

South of Panama

h about 15 km

Magnitude· 6. 75 (Pas),

6.25-6.5 (Pal), 6.0 (CGS),

6.4 (RVO).

Dec. 16

Dec., 22

M Z iP

D Z iP

MP Z iP

U Z iP

Pa Z iP

Na Z iP

Hi ' .Z iP

NB Z iP

Ke Z iP

U PEZ ePP

U PEE eS

U PEE eL

U PEZ eR

M Z Tmax

A Z Tmax

D Z Tmax _... _._-_......_._ .._-... ~--

27
Table 5.--Distant earth@uakes-~Continued

20:58:59

02:13:26.1 C

27.2 c

27.2 c

28.2 G,

26.3 c

02:50:26

44

24

45

26

38

15

22

iP

eP

iP

eP

eP

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

Tmax

December 28, 1965

U PEZ eR

C&GS card 96-65:

20:32:24.7

27.8°N., 141.8°E.

Bonin Islands region

h about 36 km '

Magnitude 6 (Pas), 5.9 (cas).

Dec. 30

M Z

A Z

D Z

ME' Z

U Z

M Z

A Z

D Z

MP Z

U Z

Pa Z

Hi Z

NB Z

C&GS card 96-65:

02:06:31.1

54. ION. , l64.3°W.

Unimak Island region

h about 28 km

Magnitude 5.75 (Brk),

5.75 (Pal), 5.6 (cas).

28
Publications of special interest and HVO contributions, 1965

Kinoshita, W. T., 1965,. Agravity survey of the i.sland of Hawaii:

Pacific 'Sci~j v~ 19j no .. 3, p. 339-340.

Kinoshita, W. T. ,and Okamura, R~ T., .1965, A gravity s11rvey of the

isle,nd of,.~ui, Hawai.i: ~ac.ifi.c Sci., v., 19, no. 3, p. 341-342.

Koyanagi, ,R.Y.,.and.Endo, E. T., 1965,. Hawaii~n,seismic events

during 1963, in Geological Survey Re~earch 1965: u.S. Geol.

Survey Prof. P~per 525-~, p. B13-B~6.

Krivoy, H. L., 1965, A gravity survey of. the island of Niihau,

Hawaii:' .Pacific Sci., v .. 19",no.3, p .. 359-3?0.

Krivoy, H.' L., Baker, Melville, Jr., and Moe, E. E., 1965, A

reconnaissanGe gravity survey of. the;. island of Kauai, Hawaii:

Pacific Sci." v. 19, ~o. 3, .p•. 35,4-358 .

Krivoy, H. L., and Lane, M.,. P., 1965 A preliminary gravity survey

of the island of Lanai, Hawaii: Pacific Sci., v. 19, no. 3,

p. 346-348.

Moore, J. G., 1965, 'Petroi;gy of deep-sea basalt near Hawaii: Am.

Jour. Sci.', v. 263, p .. 40-52 ...

Moore, J~ G., and Ault, W•. U. " 1965, Historic littoral cones in

Hawaii: Pacific Sci., v. 19, no. 1, 'p. 3-11'-

Moore, J. G., and Krivoy, H. L. z' 1965,,':A reconnaissance gravity

survey of the island of Molokai, Hawaii: Pacific Sci., v. 19,

no. 3, p,' 343-345.

A. Papers presented at meeting in Hakone, Japan, 1965, on "Investigations of

Hawaiian volcanoes, 1963," a part of the Japan-U.S. Cooperative Science

Program

(Abstracts published in 'printed program'for the meeting; copies of

individual abstract available on request from. Hawaiian Volcano Observatory.)

Aramaki, S.• , and Moore, J. G., Chrono1ogic~1 cnange in chemistry of Hawaiian

tholeiitic lava.

Eaton, J. P., and Krivoy, H. L., Detailed observations of ground deformation,

lava extrusion, and harmonic tremor during the 1959-60 eruption of

Kilauea.

Eaton, J. P., and Okamura, ·A. T., A family of earthquakes from a source

30 km beneath the summit of Kilauea Volcano.

29
Kinoshita, w. T., Magnetic studies of Alae lava lake, Hawaii.

Kinoshita, w. T. , May 1963'seismic episode an the Kaoe fault' .zone, Hawaii.

Koyanagi, R. Y., The Kaoiki eart:p.quakes of June 27, 1962, and general

descriptions of recent Hawaiian seismic activity.

Minakami, T. Earthquakes originating from the 1959 Kilauea Iki lava lake

and extremely shallow earthquakes inside Kilauea caldera.

Minakami, T., Hiraga, B., and Fujii, K., Hypocentral distribution of

earthquakes near Kilauea caldera during July-December 1963.

Moore, J. G., Evidence of gravity slide origin of east rift zone of

Kilauea. Volcano, Hawaii.

Moore, J. G., Immediate seismic prelude to recent eruptions of Kilauea

Volcano.

Peck, D. L., Solidification of Alae ~ava lake, Hawaii.

Shimozuru, D., Kamo, K., and Kinoshita, W. T., Study of volcanic microtremor at Kilauea Volcano, Hawaii, during the period July-December

1963.

B. Abstracts of paper$: Internatiopal Symposium on Volcanology,

November 22-December 3, ~965, New Zealand.

Decker, R. W., Hill, D. P., .and Wright, T. L., Horizontal deformation

of Kilauea caldera, Hawaii.

Furumoto, A. S., Structure of Hawaiian volcanoes from seismic refraction

data.

Malahoff, A., and Woollard, G. P., Magnetic surveys over the Hawaiian

Ridge and their volcanological implications.

Peck~ D. L., Wright, T. L., and Moore, J. G., Crystallization of

tholeiitic basalt in Alae 'lava lake, Hawaii.

30