C. 11211

U.S. GEOLOGICAL SURVEY CIRCULAR 1121

Catalogue of U.S. Geological Survey 

-Motion Records, 1993
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Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1993

Compiled by JOSEPHINE C. SWITZER and 

RONALD L. PORCELLA

U.S. GEOLOGICAL SURVEY CIRCULAR 1121
U.S. DEPARTMENT OF THE INTERIOR 

BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY 

Gordon P. Eaton, Director

For sale by

U.S. Geological Survey, Map Distribution

Box 25286, MS 306, Federal Center

Denver, CO 80225

Any use of trade, product, or firm 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 first seismic engineering program in the United States was administered by the 

Seismological Field Survey (SFS) of the U.S. 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 Department of Veterans Affairs, 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 strongmotion recordings recovered during 1993. Unless otherwise referenced, earthquake data and information 

are taken from the "Preliminary Determination of Epicenters," published weekly by the U.S. Geological 

Survey.
CONTENTS

Preface HI 

Introduction 1

TABLE

1. U.S. Geological Survey accelerograph records recovered during 1993 2
Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1993

Compiled by Josephine C. Switzer and Ronald L. Porcella

INTRODUCTION

During the period January-December 1993, only 83 accelerograph records were 

recovered from permanent National Strong-Motion Program (NSMP) stations operated by trn 

U.S. Geological Survey; this compares with an annual average of more than 300 recordings fcthe period 1974 through 1992. Accelerograms were recovered from NSMP instrumentation 

triggered by 12 California earthquakes in the magnitude 3 to 6.2 range; 4 Hawaii earthquakes, 

including magnitude 4.8 and 4.9 events on January 26 and June 8, respectively; magnitude 5.7 

and 5.9 earthquakes in northern Oregon on March 5 and southern Oregon on September 21, 

respectively; and by a 5.2 earthquake in southern Alaska on May 18. Also included are 

recordings from 14 stations in the greater Anchorage region (see table 1.)

Peak ground acceleration exceeded 0.10 g at NSMP sites only twice during 1993: 0.11 

g during an unidentified southern California event near San Bernardino, and 0.28 g at Kau 

Hospital in Pahala, Hawaii, during the Mo=4.8 earthquake on January 26.

Manuscript approved for publication, January 20, 1995
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993

[Station owners: ACOE, U.S. Army Corps of Engineers; MANC, Municipality of Anchorage; USGS, U.S. Geological 

Survey; VA, U.S. Department of Veterans Affairs. Instrument trigger time in seconds after the minute or the following 

minute listed in earthquake column. S-minus trigger denotes S-wave-arrival-minus-trigger-time (S-/) or ^-wave-minus-Pwave-arrival time (S-P, in brackets) interval. Direction is of case acceleration for upward trace deflection on accelerogram; 

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

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

Numbers in parentheses refer to footnotes at end of table.]

Earthquake

16 January 1993

0629:34.9 G.m.t.

Central Calif.

37.025N, 121.458W

Magnitude 5.3 ML

24 January 1993

2109:26.2 G.m.t.

Central Calif.

35.636N, 118.455W

Magnitude 3.3 ML

25 January 1993

0814:53. 7 G.m.t.

Hawaii

Station Name Coordinates 

(Owner) (Lat. deg. N 

Long. deg. W)

Anderson Dam 37.166

(USGS) 121.628

Crest

Downstream

Structure Array:

Channel 1- Mid-dam, Center

Channel 2- Mid-dam, Center

Channel 3- Mid-dam, Right

Channel 4- Toe

Channel 5- Toe

Channel 6- Toe

Channel 7- Right Crest

Channel 8- Right Crest

Channel 9- Right Crest

Channel 10- Center Crest

Channel 11- Center Crest

Channel 12- Center Crest

Isabella Main Dam 36.645

(ACOE) 118.480

Mid-dam

Right Crest

Hawaii National Park 19.423

Volcano Observatory 155.291

(USGS)

Trigger S-minus Direction 

time trigger (az) 

(Gmt) (s)

(3) (2)

340

Up

250

340

Up

250

153

243

063

333

Up

063

333

Up

063

333

Up

063

W

1.2 285

Up

195

(2)

(4) 1.1 360

Up

270

Maximum 

amplitude

(g)

.05

.03

.09

.05

.02

.05

.04

.05

.06

.03

.02

.03

.05

.06

.05

.04

.06

.09

.04

.02

.06

(1)

.08

.05

.10

19.417N, 155.320W 

Magnitude 4.4 MD
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake

25 January 1993

0853 G.m.t.

Hawaii

Epicenter and

magnitude unknown

26 January 1993

1524:08.8 G.m.t.

Hawaii

19.219N, 155.482W

Magnitude 4. 8 MD

1 February 1993

2043 G.m.t.

Central Calif.

Epicenter and

Magnitude unknown

25 March 1993

1334:35.4 G.m.t.

Northern Oregon

45.035N, 122.607W

Magnitude 5.7 ML

Station Name Coordinates 

(Owner) (Lat. deg. N 

Long. deg. W)

Hawaii National Park

Volcano Observatory

(USGS)

Honokaa, Hawaii

Police Station

(USGS)

Honomalino, Hawaii

Mac Farms

(USGS)

Kealakekua, Hawaii

Kona Hospital

(USGS)

Pahala, Hawaii

Kau Hospital

(USGS)

Waiohinu, Hawaii

Kau Baseyard

(USGS)

McGee Creek

Mammoth Lakes

(USGS) (Multi-channel)

166-m Downhole

35-m Downhole

1-m Downhole

Surface

Detroit Dam, Oregon

(ACOE)

Downstream

Gallery Level #7

19.423

155.291

20.080

155.465

19.169

155.868

19.523

155.879

19.20

155.47

19.070

155.615

37.550

118.811

44.72

122.25

Trigger S-minus Direction Marimum 

time trigger (az) ampMtude 

(Gmt) (s) (g)

(4) (2) (7)

(4) (2) (7)

(4) 1.2 360 .08

Up .03

270 .06

(4) (2) (7)

(4) 1.0 360 .11

Up .12

270 .28

(4) (2) (7)

(4}

(2) (7)

(2) (7)

(2) (7)

(2) (7)

(3)

2.3 198 .06

Up .05

108 .06

4.8 198 .15

Up .07

108 .18

Gallery Level #1 4.6
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake Station Name

(Owner)

Portland State U., Oregon

Cramer Hall, Basement

(USGS)

Coordinates

(Lat. deg. N

Long. deg. W)

45.513

122.683

Trigger

time

(Gmt)

(*)

S-minus

trigger

(s)

(2)

Direction Maximum

(az) amplitude

(g)

(1)

3 November 1992- 

6 April 1993 

Central Calif. 

Epicenter and 

magnitude unknown

Vancouver, Washington 45.64 

VA Hospital 122.66 

(VA)

Green Peter Dam, Oregon 44.48 

(ACOE) 122.53

Upper Gallery

Lower Gallery

Blue River Dam, Oregon 44.17 

(ACOE) 122.33

Toe

Cougar Dam, Oregon 44.13 

(ACOE) 122.24

Center Crest

Parkfield 35.797 

Liquefaction Array 120.337 

(USGS)

Array 1:

1. AC-1, 38'

2. AC-1, 38'

3. AC-1, 38'

4. AC-4, 9'

5. AC-4, 9'

6. AC-4, 9'

7. Pressure Transducer, A-l, 16.7'

8. Pressure Transducer, A-3, 16.9'

9. Pressure Transducer, A-4, 13.1'

10. Pressure Transducer, B-2, 17'

11. Pressure Transducer, B-4, 31.1'

12. Pressure Transducer, C-3, 20.7'

(3) 7.2

(4) 0.9

042 

Up 

312

.11 

.03 

.08

(2)

(2)

(2)

315 

Up 

045 

315 

Up 

045

a)
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum 

(Owner) (Lat. deg. N time trigger (az) amplitude 

Long. deg. W) (Gmt) (s) (g)

Parkfield Liquefaction Array-continued

17 May 1993

2320:49.2 G.m.t.

Central Calif.

37.171N, 117.775W

Magnitude 6.2 ML

18 May 1993

0804: 18.9 G.m.t.

Southern Alaska

61.031N, 149.953W

Magnitude 5.2 ML

Array 2:

1. AC-3, 96'

2. AC-3, 96'

3. AC-3, 96'

4. AC-2, 13'

5. AC-2, 13'

6. AC-2, 13'

7. Surface

8. Surface

9. Surface

10. Pressure Transducer, D-l,

11. Pressure Transducer, D-3,

12. Pressure Transducer, C-l,

Lake Success Dam

(ACOE)

Left Crest

Right Crest

Terminus Auxiliary Dam

(ACOE)

Center Crest

White Mountain Array

Deep Springs College

(USGS)

Anchorage, Alaska

Fire Station #4

(MANC)

Anchorage, Alaska

Old Federal Bldg

(USGS)

Anchorage, Alaska

Anchorage Lutheran Church

(USGS) Ground

Anchorage, Alaska

Fire Station #7

315 (1)

Up (1)

045 (1)

315 (1)

Up (1)

045 (1)

315 Inop.

Up Inop.

045 Inop.

30.6'

41.2'

20'

36.061

118.920

(2) (1)

(2) (1)

36.405

119.001

(2) (1)

37.291 20:55.8 3.1 360 .C<>

117.979 Up .C5

270 .C<

61.182 (3) 6.1 (7)

149.848

61.219 (3) 7.1 (7)

149.892

61.209 (4) 7.0 CO

149.891

61.146 (3) 6.4 (7)

149.950

(MANC)
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake Station Name Coordinates Trigger S-minus Direction Maximum 

(Owner) (Lat. deg. N time trigger (az) amplitude 

Long. deg. W) (Gmt) (s) (g)

Anchorage, Alaska 

Fire Station #8

(MANC)

Anchorage, Alaska 

Municipal Light and Power 

(MANC)

Anchorage, Alaska 

Alaska Pacific University 

(USGS)

Anchorage, Alaska 

Fire Dept., Maint. Facility 

(MANC)

Anchorage, Alaska 

Anchorage Records Center 

(MANC)

Anchorage, Alaska 

International Airport 

(USGS)

Anchorage, Alaska 

Humana Hospital

61.124 (3) 4.9 

149.766

61.214 (3) 6.8 

149.864

61.189 (3) 6.0 

149.801

61.214 (3) 6.4 

149.824

61.216 (3) 6.6 

149.885

61.174 (3) 6.2 

149.973

61.210 (3} 6.0 

149.820

<J)

<J)

<*)

a)

(0

<j)

(USGS) 

Ground level (7)

4th floor 225 .03

Up .04

135 .06

7th floor 225 .05

Up .05

135 .07

Anchorage, Alaska 61.220 (3) 6.4

Hilton Hotel 149.892

(USGS)

Basement (7)

6th floor (7)

14th floor (7)
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake

18 May 1993

2348:53.9 G.m.t.

Central Calif.

37.064N, 117.777W

Magnitude 5.2 ML

31 May 1993

0855:29.9 G.m.t.

Southern Calif.

Station Name Coordinates 

(Owner) (Lat. deg. N 

Long. deg. W)

Anchorage Hilton Hotel-continued

20th floor

22nd floor

(Penthouse)

Anchorage, Alaska 61.19

BP Building 149.86

(USGS)

7th floor

Structure Array

Channel 1 - 14th floor northeast corner

Channel 2 - 14th floor southwest corner

Channel 3 - 8th level northeast corner

Channel 4 - 8th level southwest corner

Channel 5 - 14th floor center

Channel 6 - 8th level center

Channel 7 - Basement northwest corner

Channel 8 - Basement southeast corner

Channel 9 - Basement southeast corner

Channel 10 - Freefield, 2 ft downhole

Channel 1 1 - Freefield, 2 ft downhole

Channel 12 - Freefield, 2 ft downhole

Eagle River, Alaska 61.350

Alaska Geological Survey 149.540

(USGS) Basement

White Mountain Array 37.291

Deep Springs College 117.979

(USGS)

Forest Falls 34.088

Post Office 116.919

(USGS)

Trigger S-minus Direction 

time trigger (az) 

(Gmt) (s)

315

Up

225

315

Up

225

(3) 6.2

360

Up

270

270

270

270

270

360

Up

Up

Up

270

090

360

Up

( *) (2)

(3) (2)

55:34.1 (2)

Maximum 

ampHtude 

(g)

.02

.06

.04

.04

.07

.04

.05

.02

.03

(I)

(I)

(1}

(1)

(1)

(1)

(1)

(1)

(1)

.06

.06

(*)

(J)

(I)

(I)

34.120N, 116.995W 

Magnitude 3.9 ML
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake

8 June 1993 

1257:49.4 G.m.t. 

Hawaii 

19.328N, 155.217W

Magnitude 4.9 MD

16 December 1992- 

20 July 1993 

Southern Calif. 

Epicenter and 

magnitude unknown

17 December 1992- 

21 July 1993

Station Name Coordinates 

(Owner) (Lat. deg. N 

Long. deg. W)

Pahala, Hawaii 

Kau Hospital 

(USGS)

Kealakekua, Hawaii 

Kona Hospital 

(USGS)

Hilo, Hawaii 

U.S.D.A. Laboratory 

(USGS)

Hawaii National Park 

Volcano Observ., Basement

(USGS)

Hawaii National Park 

Volcano Observ., Warehouse

(USGS)

Mauna Kea, Hawaii 

State Park 

(USGS)

Mauna Kea Summit, Hawaii 

U.K. Observatory 

(USGS)

Hilo, Hawaii 

Hilo Hospital 

(USGS)

Mauna Loa, Hawaii 

Observatory 

(USGS)

Fun Valley 

Reservoir 361 

(USGS)

San Bernardino Array 

Mill Creek Ranger Station

19.20 

155.47

19.523 

155.879

19.731 

155.100

19.423 

155.291

19.434 

155.264

19.752 

155.530

19.826 

155.473

19.72 

155.12

19.539 

155.580

33.925 

116.389

34.080 

117.114

Trigger S-minus Direction Maximum 

time trigger (az) amplitude 

(Gmt) (s) (g)

(4) (2) 360 .04 

Up .03 

270 .06

00 (2) (1)

(4) (2) 360 .08 

Up .02 

270 .08

(4) (2) (1)

(*) (2) (1)

(4) 7.4 360 .06 

Up .03 

270 .02

00 (2) (1)

(3) 6.1 352 .10 

Up Inop. 

262 .04

(3) 5.8 (1)

(3) (2) (1)

(3) 1.4 360 .09 

Up .05

Southern Calif. 

Epicenter and 

magnitude unknown

(USGS) 270 .11
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake

29 June 1992-

26 July 1993

Southern Calif.

Epicenter and

magnitude unknown

18 December 1992-

27 July 1993

Southern Calif.

Station Name

(Owner)

Wrightwood

Post Office

(USGS)

Leona Valley

Fire Station

(USGS)

Loma Linda

VA Hospital

(VA)

Coordinates

(Lat. deg. N

Long. deg. W)

34.360

117.629

34.62

118.29

34.049

117.250

Trigger

time

(Gmt)

00

CO

CO

S-minus

trigger

(s)

2.5

(2)

1.6

Direction Maximum

(az) ampHtude

(i)

(1)

(1)

Epicenter and 

magnitude unknown

11 August 1993 

2233:04.0 G.m.t. 

Central Calif. 

37.313N, 121.675W 

Magnitude 4.8 ML

12 August 1993 

1028:48.6 G.m.t. 

Hawaii

20.091N, 156.041W 

Magnitude 3.7 MD

21 September 1993 

0328:55.4 G.m.t. 

Southern Oregon 

42.314N, 122.012W 

Magnitude 5.9ML

South Ground Site (1)

Anderson Dam 37.166 (4) (2) 

(USGS) 121.628

Crest (1)

Downstream (1)

Structure Array, Ch. 1-12 (1)

Waimea, Hawaii 20.026 (4) (2) (1)

Fire Station

(USGS)

20.026

155.664

Honokaa, Hawaii 20.080 (4) (2) (I)

Police Station 155.465

(USGS)

Applegate Dam, Oregon 42.008 (3) (2) 

(ACOE) 123.119

Right Abutment (1)

Crest (J)

Upper Tower (1)

Lower Tower (J)

Note: One each additional record^ recovered at Applegate Dam crest, upper and 

lower towers.
Table 1. U. S. Geological Survey Accelerograph Records Recovered During 1993-Continued

Earthquake Station Name 

(Owner)

Lost Creek Dam, Oregon 

(ACOE)

Coordinates 

(Lat. deg. N 

Long. deg. W)

42.671 

122.672

Trigger 

time 

(Gmt)

(3)

S-minus 

trigger 

(s)

(2)

Direction 

(az)

Maximum 

amplitude 

(g)

Upper Tower (1) 

Left Crest (1) 

Note: One additional record^ recovered at Lost Creek Dam left crest.

1 Less than 0.05 g.

2 Questionable or indeterminable.

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. 

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

10


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Water-Supply Reports and Maps For (State)," may be purchased by 

mail and over the counter in paperback booklet form only.

"Price and Availability List of U.S. Geological Survey Publications," issued annually, is available free of charge in paperback booklet form only.

Selected copies of a monthly catalog "New Publications of the 

U.S. Geological Survey" are available free of charge by mail or may 

be obtained over the counter in paperback booklet form only. Those 

wishing a free subscription to the monthly catalog "New Publications 

of the U.S. Geological Survey" should write to the U.S. Geological 

Survey, 582 National Center, Reston, VA 22092.

Note. Prices of Government publications listed in oHer catalogs, 

announcements, and publications may be incorrect. Therefor, the prices 

charged may differ from the prices in catalogs, announcements, and 

publications.