Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1991 

Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1991 

Compiled by JOSEPHINE C. SWITZER and RONALD L. PORCELLA 

U.S. GEOLOGICAL SURVEY CIRCULAR 1101 
U.S. DEPARTMENT OF THE INTERIOR 

BRUCE BABBITT, Secretary 

U.S. GEOLOGICAL SURVEY 

Robert M Hirsch, Acting Director 

For sale by 

USGS Map Distribution 

Box 25286, Building 810 

Denver Federal Center 

Denver, CO 80225 

Any use of trade. product. or finn names in this publication is for descriptive purposes only and 

does not imply endorsement by the U.S. Government 

Library of Congress Cataloging Card No. 83-600616 
PREFACE 

The frrst seismic engineering program in the United States was administered by the 

Seismological Field Survey (SFS) of the Coast and Geodetic Survey. This program was 

begun in 1931 and essentially remained the responsibility of the SFS until 1973, when 

the U.S. Geological Survey (USGS) assimilated the program into its Earthquake Hazards 

Reduction Program. Currently, the National Strong-Motion Program (NSMP) operates a 

cooperative network containing nearly 1000 accelerographs in 39 states and Puerto Rico. 

This network is administered by the USGS in cooperation with both private industry and 

numerous Federal, State, and local agencies and organizations. Major contributors include 

the Army Corps of Engineers, the Veterans Administration, and the Metropolitan Water 

District of Southern California. Primary objectives of the program are to record strong 

ground motions and the response of representative engineered structures during moderate 

to large earthquakes, and to disseminate the resultant data and information about the 

records, sites, and structures to the earthquake engineering research and design community. 

This catalogue continues in a revised format the yearly publication "Strong-Motion 

Program Report, January-December [year]"; it is a continuation of the table 1 summary of 

accelerograms recovered at NSMP stations that had been published in that format since 

1974. This report includes all accelerograms recovered during 1991. Unless otherwise 

noted, event data are from the "Preliminary Determination of Epicenters," published 

weekly by the U.S. Geological Survey. 

III 

Preface m 

Introduction 1 

CONTENTS 

TABLE 

1. National Strong-Motion Program accelerograph records recovered during 1991 2 

v 

Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1991 

Compiled by Josephine C. Switzer and Ronald L. Porcella 

INTRODUCTION 

Ninety-one accelerograph records were recovered from the National Strong-Motion 

Program's cooperative network during January to December 1991; this compares with an 

annual average of nearly 280 records for the period 1974 through 1990. Sixty-nine 

records are from 47 stations that triggered during the ML=5.4 Sierra Madre, California, 

earthquake of June 28. Maximum horizontal ground accelerations of 0.29 g (on an SMA 

recorder) and 0.30 g (on an SSA recorder) were recorded at the Monterey Park Corporate 

Building. 

A magnitude 6.0 (ML) earthquake on August 17 triggered eight accelerographs at 

USGS stations in northern California; a peak horizontal ground acceleration of 0.11 g 

was recorded at Ferndale fire station. 

One record was recovered from the Gideon City Hall in southeast Missouri after a 

magnitude 4.6 (mblg) earthquake on May 4. The vertical acceleration was 0.11 g. Two 

magnitude 5.2 (ML) earthquakes on the Big Island of Hawaii triggered four accelerographs 

on May 8, and five accelerographs on December 9; maximum horizontal accelerations of 

0.08 g and 0.07 g, respectively, were recorded at Honomalino, in the southwestern part of 

the island. 

Manuscript approved for publication, June 14, 1993. 

1 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991 

[Station owners: ACOE, U.S. Army Corps of Engineers; BECH, Bechtel Power Corporation; JCG, JCG Finance Corporation of 

America; MWD, Metropolitan Water District of Southern Calif.; OWNR, Owner of building; USGS, U.S. Geological Survey. 

Instrument trigger time in seconds after the minute (or the following minute) listed in earthquake column. S-minus trigger denotes 

~-wave-arrival-minus-trigger-time(~-!) interval. Direction is of case acceleration for upward trace deflection on accelerogram; 

horizontal components are listed as azimuth, and vertical components as "up" or "down." Maximum amplitude is peak acceleration 

recorded at ground level on one vertical and two horizontal orthogonal components unless otherwise noted. Duration is interval 

between first and last peaks of acceleration greater than 0.10 g. Numbers in parentheses refer to footnotes at end of table.] 

Earthquake 

18 October 1990 

1721:56.0 G.m.t. 

Southern Calif. 

33.640N, 117.880W 

Magnitude 3.0 ML 

7 March 1991 

1413:21.4 G.m.t. 

Hawaii 

20.003N, 155.685W 

Magnitude 4.1 ML 

4 May 1991 

0118:54.9 G.m.t. 

New Madrid, MO 

36.564N, 89.823W 

Magnitude 4.6 mblg 

8 May 1991 

1821:11.0 G.m.t. 

Hawaii 

19.373N, 156.267W 

Magnitude 5.2 ML 

28 June 1991 

1443:54.5 G.m.t. 

Southern Calif. 

34.262N, 118.002W 

Magnitude 5.4 ML 

(Sierra Madre 

earthquake) 

Station Name 

(Owner) 

Costa Mesa 

John Wayne Airport 

(USGS) 

Waimea, Hawaii 

Fire Station 

(USGS) 

Gideon 

City Hall 

(USGS) 

Honomalino, Hawaii 

(USGS) 

Kealakekua, Hawaii 

Kona Hospital 

(USGS) 

Kailua-Kona, Hawaii 

Fire Station 

(USGS) 

Waimea, Hawaii 

Fire Station 

(USGS) 

Carbon Canyon Dam 

Brea 

(ACOE) 

Crest 

Coordinates Trigger 

(Lat. 0 N time 

Long. 0 W) 

33.677 

117.869 

20.026 

155.664 

36.454 

89.919 

19.169 

155.868 

19.523 

155.879 

19.649 

155.996 

20.026 

155.664 

33.914 

117.839 

2 

(3) 

(4) 

(3) 

(4) 

(4) 

(4) 

(4) 

(3) 

5-minus Direction 

trigger (az) 

(s) 

1.4 

3.4 

0.5 

1.7 

5.7 

(2) 

8.7 

4.5 

360 

Up 

270 

180 

Up 

090 

360 

Up 

270 

360 

Up 

270 

Maxim urn Duration 

amplitude (s) 

(g) 

.09 

.03 

.10 

(1) 

.04 

.11 

.06 

.06 

.02 

.08 

.05 

.03 

.07 

(1) 

(1) 

(1) 

1 peak 

1 peak 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. 0 W) (s) (g) 

28June 1991 Alhambra 34.085 44:00.0 3.3 

(Sierra Madre 900 S. Fremont 118.149 

earthquake, (USGS) 

continued) 

Structure Array: 

Ch. 1- 12th Floor, Center 360 .12 1 peak 

Ch. 2- 12th Floor, Center 090 .14 0.1 

Ch. 3- 12th Floor, North End 090 .13 0.1 

Ch. 4-6th Floor, Center 090 .17 0.7 

Ch. 5-6th Floor, Center 360 .12 0.5 

Ch. 6-6th Floor, North End 090 .13 0.3 

Ch. 7- 2nd Floor, Center 090 .26 3.0 

Ch. 8- 2nd Floor, Center 360 .22 2.2 

Ch. 9- 2nd Floor, North End 090 .25 0.9 

Ch. 10- Basement, Center 360 .11 1 peak 

Ch. 11- Basement, Center Up .04 

Ch. 12- Basement, Center 090 .13 0.2 

Garvey Reservoir 34.048 (3) 3.2 

Monterey Park 118.111 

(MWD) 

Abutment Bldg. 114 .09 

Up .04 

024 .08 

Crest 114 .13 1.4 

Up .06 

024 .08 

Jensen Filter Plant 34.312 (3) 3.3 

Balboa Ave. 118.496 

(MWD) 

Administration Bldg. 022 .07 

Basement Up .03 

292 .06 

Generator Bldg. 022 .06 

Up .04 

292 .04 

Reservoir Roof 022 .07 

Up .04 

292 .07 

Leona Valley Fire Station 34.62 44:03.5 5.4 (1) 

(USGS) 118.29 

3 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. oW) (s) (g) 

28June 1991 Littlerock Post office 34.52 (3) 3.8 300 .10 1 peak 

(Sierra Madre (USGS) 117.99 Up .06 

earthquake, 210 .12 1 peak 

continued) 

Live Oak Reservoir 34.140 (3) 2.5 

La Verne 117.749 

(MWD) 

Abutment 180 .06 

Up .02 

090 .06 

Structure Array: 

Ch. 1- Center Crest 155 .05 

Ch. 2- Center Crest Up .05 

Ch. 3- Center Crest 245 .16 1.1 

Ch. 4- Left Crest 155 .06 

Ch. 5- Left Crest 245 .16 1.2 

Ch. 6- Left Slope 245 .11 1 peak 

Ch. 7- Center Slope 155 .05 

Ch. 8- Center Slope Up .02 

Ch. 9- Center Slope 245 .11 1 peak 

Ch. 10- Center Toe 155 .05 

Ch. 11- Center Toe Up .02 

Ch. 12- Center Toe 245 .05 

Lone Pine Canyon 34.32 ??:07.3 (2) . (1) 

(USGS) 117.57 

Los Angeles 34.053 (3) 4.7 083 .03 

333 S. Hope 118.252 Up .10 1 peak 

( OWNR) 55th floor 353 .07 

Los Angeles 34.071 (3} 1.5 335 .06 

444 S. San Vicente 118.374 Up .03 

(OWNR) Roof (12) 245 .05 

Los Angeles 34.063 (3) 4.8 028 .04 

600 S. Commonwealth Ave. 118.284 Up .06 

(OWNR) 19th floor 298 .04 

Los Angeles 34.060 (3) 4.7 (1) 

695 S. Vermont Blvd. 118.290 

(OWNR) 18th floor 

Los Angeles 34.098 (3) 4.1 090 .21 5.0 

1526 N. Edgemont Ave. 118.294 Up .06 

(OWNR) Roof (8) 360 .13 3.7 

4 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. 0 W) (s) (g) 

28June1991 Los Angeles 34.067 (3) (2) 

(Sierra Madre 1111 Sunset Blvd. 118.248 

earthquake, (MWD) 

continued) 

Basement 348 .05 

Up .03 

258 .04 

4th Floor 348 .06 

Up .04 

258 .04 

Roof (8th) 348 .05 

Up .10 1 peak 

258 .07 

Los Angeles 34.052 (3) 4.4 

1100 Wilshire Blvd. 118.263 

(JCG/USGS) 

Basement 3 NE 298 .07 

Up .04 

208 .OS 

Basement 3 SE 298 .05 

Up .03 

208 .05 

Basement 4 NW 298 .04 

Up .02 

208 .05 

Structure Array: 

Ch. 1- 12th Floor, North 298 .07 

Ch. 2- 12th Floor, North 208 .12 1 peak 

Ch. 3- 12th Floor, South 208 .OS 

Ch. 4- 13th Floor, North 298 .08 

Ch. 5- 13th Floor, North 208 .13 0.8 

Ch. 6- 13th Floor, South 208 .05 

Ch. 7- 32nd Floor, North 298 .07 

Ch. 8- 32nd Floor, North 208 .11 5.4 

Ch. 9- 32nd Floor, South 208 .04 

Ch. 10- Ground Floor, North 298 .06 

Ch. 11- Ground Floor, North 208 .06 

Ch. 12- Ground Floor, South 208 .07 

Los Angeles 34.056 (3) 4.6 (1) 

2055 Avenue of the Stars 118.413 

(OWNR) 31st floor 

5 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. 0 W) (s) (g) 

28June 1991 Los Angeles 34.059 (3) (2) (1) 

(Sierra Madre 2029 Century Park East 118.413 

earthquake, (OWNR) 43rd floor 

continued) 

Los Angeles 34.058 (3) 1.7 (1) 

2049 Century Park East 118.412 

(OWNR) 43rd floor 

Los Angeles 33.945 (3) 3.2 (1) 

5250 Century Blvd. 118.372 

(OWNR) Roof (8) 

Los Angeles 34.063 (3) (2) (1) 

10550 Wilshire Blvd. 118.431 

(OWNR) 14th floor 

Los Angeles 34.062 (3) (2) (1) 

10601 Wilshire Blvd. 118.433 

(OWNR) 21st floor 

Los Angeles 34.061 (3) 0.7 160 .06 

10660 Wilshire Blvd. 118.434 Up .04 

(OWNR) 19th floor 070 .10 1 peak 

Los Angeles 34.044 (3) (2) (1) 

12121 Wilshire Blvd. 118.467 

(OWNR) 15th floor 

Los Angeles 33.855 (3) 4.5 (1) 

19191 S. Vermont 118.291 

( OWNR) Roof (11) 

Los Angeles 33.996 (3) 4.8 360 .09 

Bulk Mail Facility 118.162 Up .04 

(USGS) 270 .09 

Los Angeles 34.118 (3) (2) 360 .04 

Griffith Park 118.299 Up .04 

(USGS) 270 .06 

Los Angeles 34.097 (3) (2) (1) 

Sepulveda Canyon 118.478 

(MWD) 

Los Angeles 34.040 (3) (2) 235 .06 

1955 Purdue Avenue 118.445 Up .01 

(USGS) 145 .05 

Los Angeles 34.063 (3) 5.4 180 .13 6.3 

4929 Wilshire Blvd. 118.337 Up .10 0.2 

(OWNR) Roof (11) 090 .13 0.7 

6 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. 0 W) (s) (g) 

28June 1991 Monterey Park 34.044 (3) (2) 

(Sierra Madre 2580 Corporate Place 118.163 

earthquake, (USGS) 

continued) 

SMA-1 Accelerograph 180 .15 0.7 

(Analog) Up .13 0.4 

090 .29 1.2 

SSA-1 Accelerograph 360 .13 

(Digital) Up .12 

090 .30 

Morris Dam 34.173 (3) 1.9 

(MWD) 117.879 

Left Abutment 245 .07 

Up .08 

155 .06 

Newport Beach 33.618 (3) 7.1 

840 Newport Center Dr. 117.878 

(USGS) 

Structure Array: 

Ch. 1- Tower 2, Levell, Center 360 .05 

Ch. 2- Tower 2, Level 1, Center Up .01 

Ch. 3- Tower 2, Levell, Center 090 .04 

Ch. 4- Tower 2, Level 2, West Inoperative 

Ch. 5- Tower 2, Level2, Center 360 .07 

Ch. 6- Tower 2, Level 2, Center 090 .08 

Ch. 7- Tower 2, Level9, South 090 .03 

Ch. 8- Tower 2, Level10, Center Inoperative 

Ch. 9- Tower 2, Level 10, Center Inoperative 

Ch. 10- Tower 1, Level9, East 360 .02 

Ch. 11- Tower 1, Level10, Center 270 .05 

Ch. 12- Tower 1, Level10, Center 360 .OS 

Norwalk 33.916 (3) (2) 

12400 Imperial Highway 118.067 

(USGS/BECH) 

North Ground Site (1) 

South Ground Site (1) 

Norwalk 33.917 (4) (2) 

12440 Imperial Highway 118.066 

(USGS/BECH) 

North Site (1) 

7 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake 

28June1991 

(Sierra Madre 

earthquake, 

continued) 

Station Name Coordinates Trigger 

(Owner) (Lat. oN time 

Long. 0 W) 

South Site 

Basement 

Structure Array 1: 

Ch. 1- 9th Level (Roof) Bldg. Center 

Ch. 2- 6th Level, Bldg. Center 

Ch. 3- 3rd Level, Bldg. Center 

Ch. 4- 2nd Level, Bldg. Center 

Ch. 5-1st Level (Basement), East End 

Ch. 6-6th Level, Bldg. West-Center 

Ch. 7- 1st Level (Basement), Bldg. Center 

Ch. 8- 1st Level (Basement), Bldg. Center 

Ch. 9- 1st level (Basement), Bldg. Center 

Ch. 10- Downhole (30'), Bldg. Center 

Ch. 11- Downhole (30'), Bldg. Center 

Ch. 12- Downhole (30'), Bldg. Center 

Structure Array 2: 

Ch. 13- 9th Level (Roof), East End 

Ch. 14- 6th Level, East End 

Ch. 15- 3rd Level, East End 

Ch. 16- 2nd Level, East End 

Ch. 17- 9th Level (Roof), Bldg. Center 

Ch. 18- 6th Level, Bldg. Center 

Ch. 19- 3rd Level, Bldg. Center 

Ch. 20- 2nd Level, Bldg. Center 

Ch. 21- 9th Level (Roof), West End 

Ch. 22- 6th Level, West End 

Ch. 23- 3rd Level, West End 

Ch. 24- 2nd Level, West End 

Palmdale Fire Station 34.58 (3) 

(USGS) 118.10 

Paradise Springs Camp 34.40 (3) 

(USGS) 117.80 

Prado Dam 33.888 (3) 

Corona 117.640 

(ACOE) 

Downstream 

Riverside 33.968 (3) 

Santa Ana River Bridge 117.447 

(MWD/USGS) 

North Abutment 

Recorder Building 

8 

S-minus Direction Maximum Duration 

trigger (az) amplitude (s) 

(s) (g) 

(1) 

(1) 

090 .08 

090 .04 

090 .03 

090 .02 

180 .02 

180 .05 

Up .01 

Inoperative 

180 .01 

Inoperative 

090 .01 

180 .01 

180 .07 

180 .05 

180 .02 

180 .01 

180 .07 

180 .05 

180 .03 

180 .02 

180 .06 

180 .04 

180 .02 

180 .02 

(2) (1) 

(2) (1) 

5.5 

(1) 

(2) 

(1) 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. 0 W) (s) (g) 

28June 1991 Structure Array: 

(Sierra Madre Ch. 1-12 (1) 

earthquake, 

continued) San Antonio Dam 34.157 (3) 3.2 

Upland 117.676 

(ACOE) 

Crest 090 .11 1 peak 

Up .07 

360 .23 2.2 

Downstream 090 .04 

Up .04 

360 .06 

San Bernardino Array 34.086 (3) (2) (1) 

Valley College 117.309 

(USGS) 

San Joaquin Reservoir 33.620 (3) (2) 

(MWD) 117.842 

Left Abutment (1) 

Crest 087 .05 

Up .02 

357 .05 

Valyermo Forest Station 34.44 (3) 2.3 300 .05 

Ground Level 117.85 Up .05 

(USGS) 210 .05 

Weymouth Filter Plant 34.114 (3) 3.3 

La Verne 117.778 

(MWD) 

Bldg., Ground Level 015 .05 

Up .04 

285 .04 

Water Tank, Top 015 .11 1 peak 

Up .09 

285 .12 3.7 

Whittier 33.977 (3) (2) 

7215 Bright A venue 118.036 

(USGS) 

Basement (1) 

9 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. 0 W) (s) (g) 

28 June 1991 5th Floor (1) 

(Sierra Madre 

earthquake, lOth Floor 180 .05 

continued) Up .03 

090 .04 

Los Angeles 34.106 (3) 3.8 360 .06 

2005 N. Highland Ave. 118.336 Up .03 

(OWNR) Roof (8) 270 .07 

Wrightwood Post Office 34.360 (3) 1.3 360 .05 

(USGS) 117.629 Up .04 

270 .05 

Whittier Narrows Dam 34.020 (3) 3.7 

Pico Rivera 118.053 

(ACOE) 

Crest 120 .06 

Up .05 

030 .06 

Upstream 120 .05 

Up .09 

030 .05 

17 August 1991 Eel River Valley Array 40.498 29:50.6 (2) 360 .05 

1929:40.0 G.m.t. Bunker Hill FAA 124.294 Up .02 

Northern Calif. (USGS) 270 .05 

40.235N, 124.348W 

Magnitude 6.0 ML Eel River Valley Array 40.78 30:05.6 (2) (1) 

Butler Valley Station 2 123.88 

(USGS) 

Eel River Valley Array 40.563 (3) (2) (1) 

Centerville Beach 124.348 

(USGS) 

Eel River Valley Array 40.699 (4) (2) (1) 

College of the Redwoods 124.200 

(USGS) 

Eel River Valley Array 40.58 (4) (2) 360 .11 1 peak 

Ferndale Fire Station 124.26 Up .03 

(USGS) 270 .08 

Eel River Valley Array 40.599 (4) 5.5 360 .07 

Fortuna Fire Station 124.154 Up .03 

(USGS) 270 .07 

10 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991--Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum Duration 

(Owner) (Lat. oN time trigger (az) amplitude (s) 

Long. 0 W) (s) (g) 

17 August 1991 Eel River Valley Array 40.644 (4) 6.2 360 .06 

1929:40.0 G.m.t. Loleta Fire Station 124.219 Up .04 

Northern Calif. (USGS) 270 .05 

40.235N, 124.348W 

Magnitude 6.0 ML Eel River Valley Array 40.735 (3) (2) (1) 

(Continued) South Bay Union School 124.207 

(USGS) 

12 September 1991 Los Gatos 37.239 (4) 2.0 (1) 

0810:02.6 G.m.t. Los Altos Rod and Gun Oub 122.106 

Central Calif. (USGS) 

37.172N, 122.095W 

Magnitude 3.4 ML 

11 November 1991 Isabella Dam 

0453:27.0G.m.t. (ACOE) 

Central Calif. 

35.680N, 118.430W Main Dam 35.645 (4) (2) 

Magnitude 4.0 ML 118.480 

Right Crest (1) 

Left Crest (1) 

Mid-dam (1) 

Auxiliary Dam 35.642 (4) (2) 

118.470 

Right Abutment (1) 

17 November 1991 Eel River Valley Array 40.599 (4) 5.5 (1) 

2200:19.0 G.m.t. Fortuna Fire Station 124.154 

Northern Calif. (USGS) 

40.370N, 124.172W 

Magnitude 3.7 ML 

28 September 1990 Pahala, Hawaii 19.20 (3) 1.2 (1) 

6 December 1991 Kau Hospital 155.47 

Hawaii (USGS) 

Epicenter and 

-nagnitude unknown 

'J December 1991 Honomalino, Hawaii 19.169 (4) (2) 360 .07 

2314:30.4 G.m.t. (USGS) 155.868 Up .02 

··'iawaii 270 .07 

18.835N, 155.849W 

>'" agnitude 5.2 ML Mauna Loa, Hawaii 19.539 (4) (2) (1) 

Observatory 155.580 

(USGS) 

11 
Table 1. National Strong-Motion Program Accelerograph Records Recovered During 1991-Continued 

Earthquake Station Name Coordinates Trigger S-minus Direction 

(Owner) (Lat. oN time trigger (az) 

Long. 0 W) (s) 

9 December 1991 Waiohinu, Hawaii 19.070 (4) (2) 

2314:30.4 G.m.t. Kau Baseyard 155.615 

Hawaii (USGS) 

18.835N, 155.849W 

Magnitude 5.2 ML Waimea, Hawaii 20.026 (4) (2) 

(Continued) Fire Station 155.664 

(USGS) 

Pahala, Hawaii 19.20 (4) (2) 

Kau Hospital 155.47 

(USGS) 

Note: Two additional records1 recovered at Pahala Kau Hospital. 

1 Less than 0.05 g at ground-level or less than 0.10 g at non-ground-level stations. 

2 Questionable or indeterminable. 

Maximum 

amplitude 

(g) 

(1) 

(1) 

(1) 

3 WWVB time code illegible, or instrument not equipped with a radio receiver; correlation of accelerogram 

with event may be questionable or identity of event unknown. 

4 Contains internal clock for event correlation only; accuracy is widely variable. 

12 ' 

Duration 

(s) 

*U.S. OOVERlM!Nl' PRINriN:; OFFICE: 1994- 583-048/80010