U.S. GEOLOGICAL SURVEY CIRCULAR 1032 

Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1986 
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Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1 986 

Compiled by RONALD L. PORCELLA and 

JOSEPHINE C. SWITZER 

A revised format for the continuing yearly series previously entitled 11Strong-Motion Program Report, January-December [year] II 

U.S. GEOLOGICAL SURVEY CIRCULAR 1032 
DEPARTMENT OF THE INTERIOR 

MANUEL LUJAN, JR., Secretary 

U.S. GEOLOGICAL SURVEY 

Dallas L. Peck, Director 

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 

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1989 

Free on application to the 

Books and Open-File Reports Section 

U.S. Geological Survey 

Federal Center, Box 25425 

Denver, CO 80225 

Library of Congress Catalog-Card No. 83-600616 
PREFACE 

The first 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 National Earthquake 

Hazards Reduction Program. The current federal seismic engineering program operates 

the National Strong-Motion Instrumentation Network (NSMIN) with nearly 1,000 stations in 41 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. 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 NSMIN stations which have been published in that format 

since 1974. This report includes all accelerograms recovered during 1986. Unless 

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

published weekly by the U.S. Geological Survey. 

Ill 

CONTENTS 

Preface lll 

Introduction 1 

References 1 

TABLE 

1. Catalogue of National Strong-Motion Instrumentation Network Accelerograph 

Records Recovered During 1986 3 

Contents V 

Catalogue of U.S. Geological Survey 

Strong-Motion Records, 1 986 

Compiled by Ronald L. Porcella and josephine C. Switzer 

INTRODUCTION 

The National Strong-Motion Instrumentation Network 

(NSMIN) operated by the U.S. Geological Survey produced 517 accelerograms during 1986, including 72 that 

were recorded during the ML =6.0 North Palm Springs 

earthquake of July 8 and more than 120 aftershock records 

recovered during the period July 8 through October 15. 

Main-shock records are from nearly 50 NSMIN stations in 

the southern California region that include 30 ground sites, 

nine buildings, seven dams, and one freeway interchange 

(Porcella and others, 1987). Nineteen stations within 50 

km of the epicenter recorded peak horizontal ground motions in the range 0.05 to 0.70 g. The main shock also 

triggered more than 30 stations operated by the California 

Division of Mines and Geology (Huang and others, 1986). 

A series of five moderate-sized earthquakes 

(ML =5.6-6.5) occurred in the region about 20 km north of 

Bishop in eastern California between July 20 and 31. 

Nearly 200 accelerograms related to these events and aftershocks were recovered from NSMIN stations during 

July-December; 13 of these contain peak horizontal ground 

motions in the range 0.11--0.40 g (Maley and others, 1986). 

Three additional 1986 earthquakes produced noteworthy collections of accelerograms at NSMIN stations. A 

magnitude 5.5 event on January 26 near Hollister in central 

California triggered accelerographs at 12 stations. MaxiManuscript approved for publication, March 1, 1989. 

mum recorded vertical motion was 0.29 g at Hollister City 

Hall; maximum horizontal acceleration reached 0.17 g at a 

private residence in Hollister. A magnitude 5.7 earthquake 

southeast of Fremont, California, on March 31 triggered 10 

accelerographs at 7 NSMIN stations in the southern San 

Francisco Bay area. The stations are located at two dams, 

two Veterans Administration hospitals, a freeway interchange, and two at Stanford University. On May 31 a 

magnitude 4.8 earthquake near Bear Valley in central 

California triggered six stations in the NSMIN Bear Valley 

Array and one at Hollister; maximum horizontal ground 

acceleration was 0.32 g, recorded at Array Station 12. 

REFERENCES 

Huang, M.J., Sherburne, R.W., Parke, D.L., and Shakal, A.F., 

1986, CSMIP strong-motion records from the Palm Springs, 

California, earthquake of 8 July 1986: California Division of 

Mines and Geology Report No. OSMS 86-05, 74 p. 

Maley, R. P., Etheredge, E.C., and Acosta, A., 1986, U.S. Geological Survey strong-motion records from the Chalfant 

Valley, California, earthquake of July 21, 1986: U.S. Geological Survey Open-File Report 86-568, 19 p. 

Porcella, R., Etheredge, E., Maley, R., and Switzer, J., 1987, 

Strong-motion data from the July 8, 1986 North Palm 

Springs earthquake and aftershocks: U.S. Geological Survey 

Open-File Report 87-155, 37 p. 

Introduction 

Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986 

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

California Department of Transportation; CDWR, California Department of Water Resources; CLA, 

City of Los Angeles; MWD, Metropolitan Water District of Southern California; SDGE, San Diego 

Gas and Electric Company; UCB, University of California at Berkeley; USBR, U.S. Bureau of 

Reclamation; USGS, U.S. Geological Survey; VA, Veterans Administration. Instrument trigger 

time in seconds after the minute (or the following minute) listed in event column. S-minus 

trigger denotes S-wave-arrivalminus-trigger-time (S-t) or S-wave-minus- P-wave-arrival time 

interval. Direction is of case acceTeration for upward trace deflection-on accelerogram; 

horizontal components are listed as azimuth, and vertical components as 11 UP 11 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 ~.] 

Earthquake 

4 December 1985-

14 January 1986 

Central Calif. 

Epicenter and 

magnitude unknown 

14 January 1986 

0307:54.9 G.m.t. 

Central Calif. 

36.563N, 121.203W 

Magnitude 3.3 ML 

14 January 1986 

0309:36.3 G.m.t. 

Central Ca 1 if. 

36.572N, 121.205W 

Magnitude 4.7 ML 

Station name 

(owner) 

Station 

location 

( 0) 

Trigger S-minus Direction 

time trigger (az) 

Bear Valley Station 10 

Webb Residence 

(USGS) 

Bear Valley Station 10 

Webb Residence 

(USGS) 

Bear Valley Station 1 

CDF Fire Station 

(USGS) 

Bear Valley Station 2 

Stone Canyon West 

(USGS) 

36.532N 

121.143W 

36.532N 

121.143W 

36.573N 

121.184W 

36.636N 

121.234W 

(2) 

56.7 

38.1 

39.3 

Bear Valley Station 5 36.673N 39.7 

Callens Ranch 121.195W 

(USGS) 

Bear Valley Station 6 36.504N 41.3 

James Ranch 121.101W 

(USGS) 

Bear Valley Station 7 36.483N 38.8 

Pinnacles 121.184W 

(USGS) 

Bear Valley Station 10 36.532N 38.2 

Webb Residence 121.143W 

(USGS) 

Bear Valley Station 12 36.658N 39.7 

Williams Ranch 121.249W 

(USGS) 

(s) 

0.9 

1.4 

0.8 

( 2) 

2.7 

(2) 

1.6 

2.0 

2.1 

310 

Up 

220 

310 

Up 

220 

310 

Up 

220 

310 

Up 

220 

310 

Up 

220 

Maximum 

amplitude 

(.gJ 

(1) 

( 1) 

.27 

.05 

.19 

(1) 

.06 

.04 

.10 

(1) 

.05 

.05 

.08 

.22 

.12 

.22 

.09 

.05 

.14 

Duration 

(s) 

0.1 

0.2 

1 peak 

1 peak 

0.4 

0.5 

Table 1 3 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (az) amplitude (s) 

(0) (s) (_gJ 

Bear Valley Stat ion 14 36.569N 40.1 (2) (1) 

Upper Butts Ranch 121. 043W 

(USGS) 

14 January 1986 Bear Valley Station 1 36.573N 50.3 (2) (1) 

0535:47.9 G.m.t. CDF Fire Station 121.184W 

Central Calif. (USGS) 36.568N, 121.202W 

Magnitude 2.9 ML Bear Valley Station 7 36.483N 49.9 (2) ( 1) 

Pinnacles 121.184W 

(USGS) 

Bear Valley Station 10 36.532N 49.7 (2) (1) 

Webb Residence 121.143W 

(USGS) 

14 January 1986 Bear Valley Station 10 36.532N 24.4 (2) 0550 G.m.t. Webb Residence 121.143W 

Central Calif. (USGS) 

Epicenter and 

magnitude unknown 

15 January 1986- Bear Valley Station 10 36.532N (2) (2) (1) 26 January 1986 Webb Residence 121.143W 

Central Calif. (USGS) 

Epicenters and 

One additional record1 magnitudes unknown Note: recovered at Webb Residence. 

26 January 1986 Bear Valley Station 1 36.573N 57.8 (2) (1) 

1920:51.2 G.m.t. Fire Station 121.184W 

Central Calif. (USGS) 

36.810N, 121.275W 

Magnitude 5.5 ML Bear Valley Station 2 36.636N 56.4 (2) ( 1) 

Stone Canyon West 121.234W 

(USGS) 

Bear Valley Station 5 36.673N 54.7 (2) (1) 

Callens Ranch 121.195W 

(USGS) 

Bear Valley Station 6 36.504N 03.1 (2) (1) 

James Ranch 121.101W 

(USGS) 

Bear Valley Station 10 36.532N (3) (2) (1) 

Webb Residence 121.143W 

(USGS) 

Bear Valley Station 12 36.658N (3) 3.4 310 .12 0.6 

Williams Ranch 121. 249W Up .01 

(USGS) 220 .12 1 peak 

4 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake 

26 January 1986 

2346:54.9 G.m.t. 

Central Calif. 

36.828N, 121.290W 

Magnitude 3.8 ML 

10 February 1986 

0340 G.m.t. 

Central Calif. 

Epicenter and 

magnitude unknown 

9 March 1986 

2241:42.5 G.m.t. 

Southern Calif. 

34.110N, 117.770W 

Magnitude 3 . 5 ML 

Station name 

(owner) 

Station 

location 

(0) 

Trigger S-minus Direction 

time trigger (az) 

(s) 

Bear Valley Station 14 36.569N 58.3 (2) 310 

Up 

220 

Upper Butts Ranch 121.043W 

(USGS) 

Hollister City Hall 

Basement Annex 

(USGS) 

Hollister 

Damler Residence 

(USGS) 

Hollister 

SAGO Vault 

(USGS) 

Hollister Diff. 

Array (SMA) 

(USGS) 

San Justo Damsite 

(USBR) 

Left Abutment 

Right Abutment 

(Dike) 

Hollister City Hall 

Basement Annex 

(USGS) 

36.851N 54.8 2.8 

121.402W 

36.807N 54.54 2.4 

121.408W 

36.765N 57.74 (2) 

121.446W 

36.888N 54.7 

121.413W 

36.815N 55.4 

121.447W 

36.827N 55.2 

121.445W 

36.851N 

121.402W 

57.4 

(2) 

3.1 

2.5 

2.4 

180 

Up 

090 

360 

Up 

270 

255 

Up 

165 

360 

Up 

270 

360 

Up 

270 

Maximum 

amp 1 itude 

(.gJ 

.03 

.02 

.06 

.10 

.29 

.12 

.17 

.09 

.14 

(1) 

.09 

.15 

.10 

.16 

.07 

.14 

.09 

.04 

.08 

(1) 

Duration 

(s) 

1 peak 

1.5 

0.5 

3.3 

0.8 

0.3 

2 peaks 

0.5 

0.4 

Note: One additional record1 recovered at Hollister City Hall Annex. 

Bear Valley Station 10 

Webb Residence 

(USGS) 

Live Oak Reservoir 

(MWD) 

Abutment 

36.532N 

121.143W 

34.134N 

117.753W 

48.5 

(3) 

1.4 

0.6 180 

Up 

090 

(1) 

.10 

.03 

.05 

1 peak 

Table 1 5 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (az) amplitude (s) 

(0) (s) (gJ 

Live Oak Reservoir - continued 

Structure Array 

Ch. 1-Center crest 0.8 155 .09 

Ch. 2-Center crest (2) Up .04 

Ch. 3-Center crest 0.7 245 .13 0.1 

Ch. 4-Left crest 0.7 155 .09 

Ch. 5-Left crest 0.6 245 .14 0.1 

Ch. 6-Left slope 0.7 245 .10 1 peak Ch. 7-Center slope 0.6 155 .09 

Ch. 8-Center slope (2) Up .02 

Ch. 9-Center slope 0.7 245 .09 

Ch. 10-Center toe 0.6 155 .07 

Ch. 11-Center toe (2) Up .02 

Ch. 12-Center toe 0.6 245 .05 

San Antonio Dam 34.166N (3) (2) 

(ACOE) 117.680W 

Crest (1) 

Weymouth Filter Plant 34.114N (3) 

( MWD) 117.778W 

Ground 0.7 (1) 

Tank top (1) 

10 March 1986 Santa Barbara 34.42 N (3) 2.3 ( 1) 

1533:16.2 G.m.t. Courthouse 119.70 w 

Southern Calif. (USGS) 

34.400N, 119.800W 

Magnitude 4.0 ML 

13 March 1986 Coalinga 36.229N 03.4 0.6 360 .05 

0836:59.4 G.m.t. Oil City 120.360W Up .01 

Central Calif. (USGS) 270 .03 

36.309N, 120.312W 

Magnitude 2.7 ML 

24 March 1986 Bear Valley Station 1 36.573N 34.8 0.7 (1) 2255:34.0 G.m.t. CDF Fire Station 121.184W 

Central Ca l i f . (USGS) 

36.557N, 121.183W 

Magnitude 3.0 ML 

29 March 1986 Emeryville 37.844N (3) (2) (1) 1624:04.2 G.m.t. 6363 Christie Ave. 122.295W 

Central Calif. (USGS) 

37.877N, 122.203W 

Magnitude 4.0 ML U.C. Berkeley 37.87 N 07.5 (2) (1) 

Strawberry Canyon 122.24 w 

(UCB) 

6 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direct ion Maximum Duration 

(owner) location time trigger (az) amplitude (s) 

( 0) (s) (_gJ 

31 March 1986 Anderson Dam 37.166N 

1155:40.0 G.m.t. (USGS)( SMA) 121. 628W 

Centra 1 Ca 1 if. 

37.483N, 121.690W Crest 49.2 3.8 (1) 

Magnitude 5.7 ML 

CR-1 (12-channel) 49.2 (2) ( 1) 

De 1 Va 11 e Dam 37.615N ( 3) 2.5 

( CDWR) 121.745W 

Crest 065 .15 1.4 

Up .08 

335 .10 1 peak 

Livermore 37.625N (3) 2.8 

VA Hospita 1 , Bldg. 62 121.762W 

(VA) 

Basement 125 .07 

Up .05 

035 .09 

Roof (7th 1 eve 1 ) 125 .15 0.7 

Up .10 3 peaks 

035 .39 1.4 

Palo Alto 37 .. 40 N (3) (2) 

VA Hospital, Bldg. 1 122.14 w 

(VA) 

Basement ( 1) 

Roof (7th 1 eve 1) (1) 

San Jose, 101/280/680 37.340N 49.44 4.6 322 .07 

Freeway Interchange 121.851W Up .05 

(USGS/COOT) 232 .04 

Stanford Univ. Quad. 37.429N ( 3) (2) (1) 

Palm Dr. & Serra St. 122.169W 

(USGS) 

Stanford University 37.419N 08.24 (2) ( 1) 

SLAC Test Laboratory 122.205W 

(USGS) 

15 April 1986 Bear Valley Station 12 36.658N 59.3 (2) ( 1) 

0925:56.7 G.m.t. Williams Ranch 121.249W 

Central Calif. (USGS) 

36.677N, 121.347W 

Magnitude 3.6 ML 

Table 1 7 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger s-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude (s) 

(0) (s) (.[) 

26 April 1986 Kapaau, Hawaii 20.230N (3) (2) (1) 1719:46.5 G.m.t. Kohala Police Station 155.801W 

Hawaii (USGS) 

20.811N, 155.749W 

Magnitude 5.0 ML 

28 April 1986 Hollister 36.888N 44.4 (2) (1) 

2218:40.6 G.m.t. Differential Array 121.413W 

Central Calif. (USGS) 

36.815N, 121.258W 

Magnitude 3.5 ML 

6 August 1985- McGee Creek, SMA 37.550N (2) (2) ( 1) 31 May 1986 (USGS) 118.811W 

Central Cal if. 

Two additional records Epicenters 1 and Note: recovered at McGee Creek SMA station. 

magnitudes unknown 

McGee Creek, CRA 37.550N (2) (2) 

(USGS) 118.811W 

166 m downhole ( 1) 

35 m downhole (1) 

Surface (1) 

Note: Two additional records1 recovered at McGee Creek CRA station. 

31 May 1986 Bear Valley Station 1 36.573N 58.4 1.0 310 .05 

0847:56.1 G.m.t. CDF Fire Station 121.184W Up .03 

Central Calif. (USGS) 220 .08 

36.570N, 121.327W 

Magnitude 4.8 ML Bear Valley Station 2 36.636N 58.9 (2) (1} Stone Canyon West 121.234W 

(USGS) 

Bear Valley Station 5 36.673N 59.3 1.7 310 .05 

Callens Ranch 121.195W Up .03 

(USGS) 220 .04 

Bear Valley Station 10 36.532N 00.3 1.2 (1) 

Webb Residence 121.143W 

(USGS) 

Bear Valley Station 12 36.658N 58.2 2.4 310 .32 1.8 

Williams Ranch 121.249W Up .13 0.3 

(USGS) 220 .25 1.3 

Bear Valley Station 14 36.569N 04.7 (2) 310 .02 

Upper Butts Ranch 121. 043W Up .02 

(USGS) 220 .05 

Hollister 36.807N 07.84 (2) (1) 

Damler Residence 121.408W 

(USGS) 

8 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (az) amplitude (s) 

( 0) ( s) (_gJ 

31 May 1986 Bear Valley Station 12 36.658N 30.3 1.9 ( 1) 

1451:27.9 G.m.t. Wi 11 iams Ranch 121.249W 

Centra 1 Ca 1 i f . (USGS) 

36.635N, 121.261W 

Magnitude 2.6 ML 

1 June 1986 Bear Valley Station 1 36.573N 36.8 1.3 310 .07 

0649:34.1 G.m.t. CDF Fire Station 121.184W Up .02 

Central Calif. (USGS) 220 .10 1 peak 36.612N, 121.267W 

Magnitude 3.6 ML Bear Valley Station 5 36.673N 38.0 (2) ( 1) 

Callens Ranch 121.195W 

(USGS) 

Bear Valley Station 12 36.658N 37.0 1.9 310 .05 

Williams Ranch 121. 249W Up .05 

(USGS) 220 .05 

Bear Valley Station 14 36.569N 43.0 (2) (1) 

Upper Butts Ranch 121. 043W 

(USGS) 

1 June 1986 Bear Valley Station 12 36.658N 47.25 1.9 ( 1) 1934:44.6 G.m.t. Wi 11 i ams Ranch 121.249W 

Centra 1 Ca 1 if. (USGS) 

36.619N, 121.252W 

Magnitude 2.5 ML 

3 June 1986 Fun Valley 33.925N 52.6 (2) ( 1) 

1414:49.2 G.m.t. Reservoir 261 116.389W 

Southern Calif. (USGS) 

33.790N, 116.340W 

Magnitude 3.7 ML Indio,Southern 33.747N 52.6 3.1 315 .05 

Calif. Gas Company 116.214W Up .01 

(USGS) 225 .02 

Thousand Palms 33.82 N (3) 0.5 135 .05 

Post Office 116.40 w Up .02 

(USGS) 045 .05 

11 June 1986 Bear Valley Station 12 36.658N 01.7 2.0 310 .10 1 peak 1508:59.6 G.m.t. Williams Ranch 121. 249W Up .04 

Central Calif. (USGS) 220 .06 

36.622N, 121.282W 

Magnitude 3.1 ML 

9 December 1985- Brea Dam 33.890N ( 3) 3.6 

13 June 1986 (ACOE) 117.930W 

Southern Calif. 

Epicenter and Left abutment ( 1) 

magnitude unknown 

Downstream (1) 

Table 1 9 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake 

30 June 1986 

Time unknown 

Central Calif. 

Epicenter and 

magnitude unknown 

8 July 1986 

0920:44.5 G.m.t. 

N. Pa 1m Springs 

34.000N, 116.610W 

Magnitude 6.0 ML 

Station name 

(owner) 

Long Beach 

VA Hospital 

(VA) 

Basement 

6th floor 

11th fl oar 

Bear Valley Station 10 

Webb Residence 

(USGS) 

Anza Fire Station 

ANZA Array 

(USGS) 

Big Pines Station 

(USGS) 

Borrego Springs 

Scripps Clinic 

(USGS) 

Brea Dam: 

(ACOE) 

Left abutment 

Downstream 

Crest 

Station 

location 

Trigger S-minus Direction 

time trigger (az) 

(0) 

33.78 N (3) 

118.12 w 

36.532N 

121.143W 

33.556N 

116. 673W 

34.38 N 

117.69 w 

19.5 

54.36 

16.73 

33.210N 02.5 

116.330W 

33.889N 

117.926W 

(3) 

(3) 

(3) 

(s) 

2.1 

0.8 

5.1 

(2) 

9.3 

(2) 

14.1 

14.0 

315 

Up 

225 

130 

Up 

040 

Maximum 

amplitude 

(_g_) 

(1) 

(1) 

(1) 

(1) 

.07 

.06 

.11 

( 1) 

(1) 

(1) 

(1) 

.04 

.03 

.07 

Note: One additional record1 recovered at Brea Dam crest. 

Cabazon Post Office 

(USGS) 

33.918N 49.50 2.4 

116. 782W 

270 

Up 

180 

Note: One additional record1 recovered at Cabazon. 

Carbon Canyon Dam 

(ACOE) 

33.92 N (3) 

117.84 w 

(2) 

.21 

.38 

.22 

Crest (1) 

Duration 

(s) 

.02 

3.3 

3.2 

2.7 

Note: One additional record1 recovered at Carbon Canyon Dam crest. 

10 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direct ion Maximum Duration 

(owner) location time trigger ( az) amplitude ( s) 

( 0) (s) (_gJ 

Cherry Valley 33.98 N 51.48 5.2 295 .10 1 peak 

(USGS) 116.99 w Up .06 

205 .10 1 peak 

Chihuahua Valley 33.38 N (3) 7.9 270 .05 

ANZA Array 116.68 w Up .04 

(USGS) 180 .07 

Note: One additional record1 recovered at Chihuahua Valley. 

Coachella Can a 1 33.64 N 56.8 9.8 315 .09 

Station 1 116.08 w Up .05 

(USGS) 225 .14 2 peaks 

Coachella Canal 33.56 N (3) 9.0 (1) 

Station 2 115.95 w 

(USGS) 

Collins Va 11 ey 33.405N 56.3 (2) ( 1) 

(USGS) 116.467W 

Colton Interchange 34.06 N ( 3) 6.4 

(COOT) 117.30 w 

Bridge cell 082 .12 1.7 

Up .05 

352 .10 1 peak 

Vault (3) 5.9 082 .06 

Up .02 

352 .06 

Note: One each additional record1 recovered at Colton Interchange 

bridge cell and vault. 

Cranston Forest 33.74 N 51.40 4.6 315 .19 1.5 

Stat ion, ANZA Array 116.84 w Up .13 0.4 

(USGS) 225 .14 1.7 

Note: Two additional records1 recovered at Cranston Forest Station. 

Diemer Filter Plant 33.91 N (3) 11.2 

( MWD) 117.82 w 

Basement ( 1) 

Reservoir roof ( 1) 

Note: One each additional record1 recovered at Diemer Filter Plant 

basement and reservoir roof. 

Forest Falls 34.09 N 50.0 4.0 300 .07 

Post Office 116.92 w Up .05 

(USGS) 210 .08 

Table 1 11 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name 

(owner) 

Fun Va 11 ey 

Reservoir 261 

(USGS) 

Station 

location 

Trigger S-minus Direction 

time trigger (az) 

( 0) (s) 

33.925N 48.95 2.8 

116.389W 

135 

Up 

045 

Note: One additional record1 recovered at Fun Valley. 

Maximum 

amplitude 

(.gJ 

.14 

.09 

.13 

Highland 34.136N 54.86 7.0 315 .04 

Fire Station 117 .213W Up .04 

(USGS) 225 .05 

Hurkey Creek Park 

ANZA Array 

(USGS) 

33.67 N 51.34 4.3 

116.68 w 

135 

Up 

045 

.18 

.08 

.24 

Note: Two additional records1 recovered at Hurkey Creek Park. 

I nd i o , Southern 33.747N 53.20 6.2 315 .12 

Calif. Gas Company 116. 214W Up .09 

(USGS) 225 .06 

Note: One additional record1 recovered at Indio. 

Jensen Filter Plant 34.309 N (3) 18.5 

( MWD) 118. 499W 

Basement (1) Admin. bldg. 

Generator room (1) Basement 

Reservoir roof ( 1) 

Duration 

(s) 

0.6 

0.6 

1.0 

0.3 

0.4 

Note: One each additional records 1 recovered at Jensen Filter Plant 

administration building basement and generator room basement. 

Keenwild Forest Station 33.71 N 50.85 3.9 180 .33 4.7 

Anza Array 116 0 71 w Up .18 8.1 

(USGS) 090 . 21 2.9 

Mathews Dam 33.852N (3) 6.8 252 .05 

Dike Toe 117.451W Up .04 

(USGS) 162 .07 

Lama Linda University 34.05 N (3) 6.0 

Medical Center 117 0 26 w 

(USGS) 

Basement (1) 

12 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (az) amplitude (s) 

(0) (s) (_gJ 

Lorna Linda 

VA Hospital 

(VA) 

South FF 34.049N (3) 6.0 (1) 

117 .250W 

North FF 34.051N 56.6 (2) 360 .05 

117.248W Up .03 

270 .04 

Structure Array, 34.049N (3) 6.3 

9 Channel CRA-1: 117 .248W 

1-1st floor center Down .02 

2-1st floor center 180 .04 

3-1st floor center 270 .04 

4-4th floor center 270 .10 1 peak 

5-1st floor north 270 .04 

6-4th floor center 180 .08 

7-4th floor north 270 .09 

8-1st floor south 180 .04 

9-4th floor south 270 .11 1 peak 

Lone Pine Canyon 34.32 N 03.65 8.7 (1) 

(USGS) 117.57 w 

Los Angeles 33.99 N (3) 16.5 ( 1) 

Bulk Mail Center 118.16 w 

(USGS) 

Lytle Creek 34.26 N 11.98 (2) (1) Mann Residence 117.50 w 

(USGS) 

Mentone Fire Station 34.067N 53.02 6.2 315 .06 

(USGS) 117.117W Up .04 

225 .04 

Morongo Valley 34.048N 47.0 1.9 135 .22 4.7 

Fire Station 116.577W Up .35 4.2 

(USGS) 045 .23 4.8 

Note: Two additional records 1 recovered at Morongo Valley Fire Station. 

North Palm Springs 33.924N 47.55 2.0 300 .68 6.0 

Post Office 116. 543W Up .78 5.6 

(USGS) 210 .70 5.3 

Note: One additional record1 recovered at N. Palm Springs Post Office. 

Table 1 13 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name 

(owner) 

Norwalk, 12400 

Imperial Highway: 

(BECH) 

Basement 

4th floor 

8th floor(roof) 

North freefield 

South freefield 

Norwalk, 12440 

Imperial Highway: 

(BECH) 

Basement 

North freefield 

South freefield 

Norwalk, 12440 

Imperial Highway: 

Bechtel Bldg. 43 

(USGS/BECH) 

Structure Array, 

12 channel CRA-1 

Station 

location 

( 0) 

33.92 N 

118.07 w 

33.92 N 

118.07 w 

Trigger S-minus Direction 

time trigger (az) 

(3) 

(3) 

(3) 

(3) 

(3) 

(3) 

(3) 

(3) 

(s) 

16.8 

16.8 

16.9 

16.8 

16.6 

16.8 

16.8 

16.8 

33.92 N 08.15 16.8 

118.07 w 

Maximum 

amplitude 

(].) 

(1) 

(1) 

( 1) 

(1) 

(1) 

(1) 

( 1) 

(1) 

1-6th floor ceiling center 090 .06 

2-4th floor ceiling center 090 .05 

3-lst floor ceiling center 090 .05 

4-Basement ceiling center 090 .04 

5-Basement floor east 360 .03 

6-4th floor ceiling 3/4 to west 360 .05 

7-Basement floor ceiling 090 .01 

8-Basement floor center Up .03 

9-Basement floor center 360 .04 

10-30 ft deep at base of caisson bldg center 090 .01 

11-30 ft deep at base of caisson bldg center Up .02 

12-30 ft deep at base of caisson bldg center 360 .03 

Ocotillo Wells 

Burro Bend Cafe 

(USGS) 

33.14 N 03.7 

116.13 w 

(2) 

Palos Verdes Reservoir 34.774N (3) (2) 

(MWD) 118.321W 

Abutment 

(1) 

(1) 

14 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 

Duration 

(s) 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

~=arthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude ( s) ( 0) (s) (_gJ 

Pine Meadow 33.578N 52.91 5.6 360 .08 

ANZA Array 116.589W Up .08 

(USGS) 270 .10 1 peak 

Pinyon Flat 33.61 N 52.0 5.4 135 .07 

Observatory 116.46 w Up .06 

ANZA Array 045 .05 

(USGS) 

Note: One additional record1 recovered at Pinyon Flat Observatory. 

Prado Dam 33.89 N 

(ACOE) 117.64 w 

Left abutment (3) (2) ( 1) 

Downstream (3) 11.0 090 .05 

Up .04 

360 .05 

Crest (3) (2) ( 1) 

Rancho de Anza 33.35 N ( 3) 8.2 135 .04 

(USGS) 116.40 w Up .03 

045 .05 

Note: One additional record1 recovered at Rancho de Anza. 

Reche Canyon 34.01 N 56.78 5.5 ( 1) 

Olive Dell Ranch 117.22 w 

(USGS) 

Red Mountain 33.64 N ( 3) (2) 360 .14 0.4 

ANZA Array 116.86 w Up .08 

(USGS) 270 .10 1 peak 

San Antonio Dam 34.16 N (3) (2) 

(ACOE) 117.68 w 

Right Abutment (1) 

Crest (1) 

Santa Rosa Mountain 33.57 N 53.25 5.9 360 .09 

ANZA Array 116.52 w Up .06 

(USGS) 270 .12 1 peak 

Skinner Dam 33.58 N 

( MWD) 117.07 w 

Abutment ( 3) 4.9 178 .08 

Up .04 

088 .08 

Table 1 15 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name 

(owner) 

Station 

location 

Trigger S-minus Direction 

time trigger (az) 

Skinner Dam - continued 

Structure Array, 

12 Channel CRA-1 

1) Center crest 

2) Center crest 

3) Center crest 

4) Left crest 

5) Left crest 

6) Left slope 

7) Center slope 

8) Center slope 

9) Center slope 

10) Center toe 

11) Center toe 

12) Center toe 

Sunnymead 

Randa Ranch 

(USGS) 

(0) (s) 

(3) (2) 

33.95 N 53.54 6.2 

117.15 w 

180 

Up 

270 

180 

270 

270 

180 

Up 

270 

180 

Up 

270 

315 

Up 

225 

Note: Two additional records 1 recovered at Sunnymead. 

Terwilliger Valley 

ANZA Array 

(USGS) 

Tripp Flats 

ANZA Array 

(USGS) 

Tule Canyon 

ANZA Array 

(USGS) 

33.48 N (3) 6.5 

116.59 w 

33.60 N 53.98 4.5 

116.74 w 

33.47 N (3) 

116.64 w 

6.9 

135 

Up 

045 

360 

Up 

270 

360 

Up 

270 

Note: One additional record 1 recovered at Tule Canyon. 

Weymouth Filter Plant 34.506 N 

( MWD) 117.77 8 W 

Ground 

Tank 

(3) 

(3) 

Whitewater Trout Farm 33.989N (3) 

(USGS) 116.655W 

9.7 

9.7 

1.6 270 

Up 

180 

Maximum 

amplitude 

(_gJ 

.09 

.05 

.12 

.07 

.07 

.06 

.07 

.06 

.08 

.10 

.05 

.09 

.13 

.06 

.11 

.03 

.04 

.07 

.05 

.05 

.08 

.10 

.04 

.11 

(1) 

(1) 

.66 

.44 

.50 

Note: 20 additional records 1 recovered at Whitewater Trout Farm. 

16 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 

Duration 

(s) 

1 peak 

1 peak 

0.2 

1 peak 

1 peak 

1 peak 

4.5 

4.9 

4.5 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake 

8 July 1986 

0924 G.m.t. 

Southern Ca 1 if. 

Epicenters and 

magnitudes unknown 

8 July 1986 

0928 G.m.t. 

Southern Calif. 

Epicenters and 

magnitudes unknown 

8 July 1986 

0930:23.6 G.m.t. 

Southern Calif. 

33.980N, 116.620W 

Magnitude 3.6 ML 

8 July 1986 

0932:20.8 G.m.t. 

Southern Calif. 

33.980N, 116.620W 

Magnitude 3.1 ML 

8 July 1986 

0949:49.7 G.m.t. 

Southern Calif. 

33.990N, 116.560W 

Magnitude 3.5 ML 

Station name 

(owner) 

Whittier 

7215 Bright Ave. 

(USGS) 

Basement 

5th floor 

lOth floor 

Morongo Valley 

Fire Station 

(USGS) 

Station 

location 

Trigger S-minus Direction 

time trigger (az) 

( 0) 

33.977N (3) 

118.036W 

34.048N 15.2 

116.577W 

(s) 

(2) 

2.2 135 

Up 

045 

Maximum 

amp 1 itude 

(_gJ 

( 1) 

(1) 

(1) 

.03 

.08 

.05 

Our at ion 

( s) 

Note: One additional record1 recovered at Morongo Valley Fire Station. 

North Palm Springs 

Post Office 

(USGS) 

33.924N 16.5 

116.543W 

2.8 300 

Up 

210 

.05 

.03 

.06 

Note: One additional record1 recovered at North Palm Springs Post Office. 

North Palm Springs 

Post Office 

(USGS) 

33.924N 17.0 

116.543W 

2.1 (1) 

Note: Two additional records 1 recovered at North Palm Springs Post Office. 

Cabazon Post Office 

(USGS) 

33.918N 27.7 

116.782W 

0.2 

Note: One additional record1 recovered at Cabazon. 

Fun Va 11 ey 33.925N 29.4 

Reservoir 261 116. 389W 

(USGS) 

Note: One additional record1 recovered 

North Palm Springs 33.924N 23.0 

Post Office 116.543W 

(USGS) 

Note: One additional record1 recovered 

North Palm Springs 

Post Office 

(USGS) 

33.924N 52.4 

116.543W 

(2) 135 

Up 

045 

at Fun Valley. 

1.8 

at North Palm 

2.1 

(1) 

.04 

.02 

.05 

(1) 

Springs Post Office. 

(1) 

Note: One additional record1 recovered at North Palm Springs Post Office. 

Table 1 17 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Our at ion 

(owner) location time trigger (az) amplitude (s) 

( 0) (s) (.gJ 

8 July 1986 North Palm Springs 33. 924N 55.0 1.7 ( 1) 

1004:52.9 G.m.t. Post Office 116.543W 

Southern Calif. (USGS) 

33.960N, 116.580W 

Magnitude 3.4 ML 

8 July 1986 Morongo Va 11 ey 34.048N ( 1) 

1009:02.9 G.m.t. Fire Station 116.577W 

Southern Calif. (USGS) 

33.970N, 116.580W 

Magnitude 3.9 ML North Palm Springs 33.924N 05.1 1.7 300 .17 0.1 

Post Office 116.543W Up .06 

(USGS) 210 .14 0.3 

Cabazon Post Office 33.918N 09.3 0.3 ( 1) 

(USGS) 116.782W 

8 July 1986 Morongo Va 11 ey 34. 048N 02.8 1.9 ( 1) 

1011:00.0 G.m.t. Fire Station 116.577W 

Southern Calif. (USGS) 

34.020N, 116.670W 

Magnitude 3.3 ML North Palm Springs 33.924N 06.3 0.3 300 .03 

Post Office 116.543W Up .02 

(USGS) 210 .06 

8 July 1986 Morongo Va 11 ey 34.048N 41.7 1.9 (1) 

1022:38.0 G.m.t. Fire Station 116.577W 

Southern Calif. (USGS) 

34.051N, 116.665W 

additional records Magnitude 1 4.4 ML Note: Two recovered at Morongo Valley Fire Station. 

North Palm Springs 33.924N 43.0 2.4 ( 1) 

Post Office 116.543W 

(USGS) 

8 July 1986 North Palm Springs 33.924N 44.9 ( 2) ( 1) 

1311 G.m.t. Post Office 116.543W 

Southern Calif. (USGS) 

Epicenter and 

magnitude unknown 

8 July 1986 North Palm Springs 33.924N 47.0 2.2 300 .07 

1639:44.1 G.m.t. Post Office 116.543W Up .01 

So u the r n Ca 1 i f . (USGS) 210 .03 

34.000N, 116.590W 

Magnitude 3.6 ML 

8 July 1986 Morongo Va 11 ey 34.048N 22.4 2.2 ( 1) 

1936:20.1 G.m.t. Fire Station 116.577W 

Southern Ca 1 if. (USGS) 

34.010N, 116.620W 

Magnitude 3.9 ML North Palm Springs 33.924N 23.3 2.6 ( 1) 

Post Office 116.543W 

(USGS) 

18 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger s-min us Direction Maximum Duration 

(owner) location time trigger ( az) amplitude (s) 

( 0) (s) (_g) 

9 July 1986 Morongo Valley 34.048N 34.4 1.8 (I) 0012:32.1 G.m.t. Fire Station 116.577W 

Southern Calif. (USGS) 

33.990N, 116.570W 

Magnitude 4.4 ML North Palm Springs 33.924N 34.4 1.8 300 .11 1 peak 

Post Office 116.543W Up .06 

(USGS) 210 .10 1 peak 

Desert Hot Springs 33.986N 34.2 1.6 360 .09 

Mission Lakes C.C. 116.535W Up .05 

(USGS) 270 .08 

9 July 1986 North Palm Springs 33.924N 23.2 1.8 (1) 0941:21.0 G~m.t. Post Office 116.543W 

Southern Calif. (USGS) 

33.970N, 116.570W 

Magnitude 3.5 ML Desert Hot Springs 33.986N 23.0 1.6 (I) Mission Lakes C.C. 116.535W 

(USGS) 

9 July 1986 Kealakekua, Hawaii 19.523N 10.5 1.2 346 .07 

1228:09.1 G.m.t. Kana Has pita l 155.879W Up .05 

Hawaii (USGS) 256 .14 0.2 

19.552N, 155.999W 

Magnitude 4.6 ML 

9 July 1986 Desert Hot Springs 33.986N 36.9 1.6 (1) 2010 G.m.t. Mission Lakes C.C. 116.535W 

Southern Calif. (USGS) Epicenter and 

magnitude unknown 

11 July 1986 Whitewater Trout Farm 33.989N 33.1 (2) ( 1) 0851:28.7 G.m.t. (USGS) 116.655W 

Southern Calif. 

Four additional records 1 33.970N, 116.580W Note: recovered at Whitewater Trout Farm. 

Magnitude 3.1 ML 

12 July 1986 Morongo Valley 34.048N 30.9 0.9 (1) 

0545:27.5 G.m.t. Fire Station 116.577W 

Southern Calif. (USGS) 

33.990N, 116.650W 

Magnitude 3.9 ML 

12 July 1986 Morongo Va 11 ey 34.048N 33.2 2.0 ( 1) 

1728:30.7 G.m.t. Fire Station 116.577W 

Southern Calif. (USGS) 

34.030N, 116.680W 

Magnitude 3.4 ML 

Table 1 19 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude (s) 

(0) (s) (_y) 

13 July 1986 North Palm Springs 33.924N 41.0 2.1 (1) 0141:38.2 G.m.t. Post Office 116.543W 

Southern Calif. (USGS) 

33.950N, 116.620W 

Magnitude 3.5 ML Desert Hot Springs 33.986N 41.0 2.2 (1) Mission Lakes C.C. 116.535W 

(USGS) 

Escondido Power Plant 33.125N ( 3) (2) 030 .04 

(SDGE) 117.117W Up .02 

300 .07 

13 July 1986 Escondido Power Plant 33.125N (3) (2) 030 .11 1 peak 

1347:08.2 G.m.t. ( SDGE) 117 .117W Up .03 

Southern Cal if. 300 .11 0.2 

32.970N, 117.870W 

Magnitude 5.3 ML 

Los Angeles 34.06 N (3) (2) 

1880 Century Park East 118.41 w 

(CLA) 

17th floor (1) 

Note: One additional record1 recovered at 1880 Century Park East, 

17th floor. 

Los Ange 1 es 34.060N (3) (2) 

2029 Century Park East 118.413W 

(CLA) 

30th floor (1) 

Note: One additional record1 recovered at 2029 Century Park East, 

30th floor. 

Los Angeles 34.06N (3) (2) 

2049 Century Park East 118.41W 

( CLA) 

30th floor (1) 

43th floor (1) 

Note: Two each additional records 1 recovered at 2049 Century Park 

East, 30th floor and 43th floor. 

Mission Power Stat i o n 32.788N (3) (2) 150 .05 

( SDGE) 117.138W Up .06 

060 .07 

20 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) 1 oca t ion time trigger ( az) amplitude ( s) 

(0) (s) (.gJ 

San Diego VA Hospital 32.87 N (3) 6.4 

La Jolla, Bldg 1 117.23 w 

(VA) 

Basement 180 .05 

Up .05 

090 .07 

17 July 1986 Morongo Valley 34.048N 17.3 1.5 135 .04 

2035:15.0 G.m.t. Fire Station 116.577W Up .04 

Southern Ca 1 if. (USGS) 045 .07 

33.990N, 116.650W 

Magnitude 4.0 ML North Palm Springs 33.924N 17.8 2.2 300 .04 

Post Office 116.543W Up .03 

(USGS) 210 .08 

Whitewater Trout Farm 33.989N 16.3 1.2 270 .14 1 peak 

(USGS) 116.655 Up .08 

180 .11 .05 

Keenwild Forest Stat ion 33.71 N 20.6 4.0 (1) 

ANZA Array 116.71 w 

(USGS) 

Desert Hot Springs 33.986N 35.2 1.9 360 .05 

Mission Lakes C.C. 116.535W Up .04 

(USGS) 270 .13 0.2 

W. Palm Springs Village 33.925N 16.6 1.3 360 .08 

St. John•s School 116.680W Up .04 

(USGS) 270 .05 

Morongo Va 11 ey 34.347N 17.3 (2) 360 .08 

Canyon House 116.604W Up .07 

(USGS) 270 .08 

17 July 1986 Cabazon Post Office 33.918N 50.3 0.2 (1) 2154:45.1 G.m.t. (USGS) 116.782W 

Southern Calif. 

33.990N, 116.650W Desert Hot Springs 33.986N 48.0 1.8 360 .06 

Magnitude 4.4 ML Mission Lakes C.C. 116.535W Up .02 

(USGS) 270 .07 

Millard Canyon 33.98 N 50.6 (2) (1) 

(USGS) 116.78 w 

Note: One additional record 1 recovered at Millard Canyon. 

Mora ngo Va 11 ey 34.048N 47.4 1.7 (1) 

Fire Station 116.577W 

(USGS) 

North Pa 1m Spr i ng s 33.924N 48.8 2.2 300 .03 

Post Office 116.543W Up .03 

(USGS) 210 .05 

Table 1 21 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake 

18 July 1986 

0718:05.4 G.m.t. 

Eastern Calif. 

37.575N, 118.827W 

Magnitude 3.0 ML 

18 July 1986 

1958:01.8 G.m.t. 

Southern Calif. 

33.970N, 116.570W 

Magnitude 3.2 ML 

20 July 1986 

1429:45.5 G.m.t. 

Eastern Calif. 

37.580N, 118.450W 

Magnitude 5.9 ML 

Station name 

(owner) 

Station 

location 

(0) 

Trigger S-minus Direction Maximum 

time trigger (az) amplitude 

(s) (~) 

W. Palm Springs Village 33.925N 46.9 1.3 360 

Up 

270 

.08 

.04 

.07 

St. John's School 116.680W 

(USGS) 

Whitewater Trout Farm 33.989N 46.6 

(USGS) 116.655W 

Me Gee Creek, SMA 

(USGS) 

McGee Creek, CRA 

(USGS) 

166 m downhole 

35 m downhole 

Surface 

1 m downhole 

Desert Hot Springs 

Mission Lakes C.C. 

(USGS) 

Long Valley Dam 

Lake Crowley 

(USGS) 

Left abutment 

37.550N 

118.811W 

37.550N 

118.811W 

33.986N 

116.535W 

37.588N 

118. 705W 

07.4 

07.5 

04.0 

(3) 

1.1 

(2) 

(2) 

2.2 

3.3 

270 

Up 

180 

275 

Up 

185 

.16 

.08 

.16 

(1) 

(1) 

( 1) 

(1) 

(1) 

(1) 

.07 

.07 

.15 

Duration 

(s) 

.55 

.35 

1.0 

Note: One additional record1 recovered at Long Valley Dam left abutment. 

Me Gee Creek 

(USGS) (SMA-1) 

McGee Creek 

( USGS) ( C RA -1 ) 

166 m downhole 

35 m downhole 

Surface 

1 m downhole 

Montgomery Pass 

Basalt, Nevada 

(USGS) 

37.550N 55.5 

118.811W 

37.550N 55.5 

118.811W 

37. 977N 01.9 

118. 318W 

1.1 

1.1 

(2) 

(1) 

( 1) 

( 1) 

(1) 

(1) 

(1) 

22 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (az) amplitude ( s) 

(0) (s) (_g) 

Terminus Dam 36.420N (3) (2) Main Dam 119.000W 

(ACOE) 

Right crest (1} 

Upper tower (1) 

Terminus Dam 36.404N 24.64 (2) Auxiliary Dam 119.001W 

(ACOE) 

Center crest (1) 

Lake Success Dam 36.061N (3) (2) 

(ACOE) 118.920W 

Slope (1) 

Right crest (1) 

21 July 1986 Buchanan Dam 37.22 N 55.2 11.4 

1442:26.6 G.m.t. ( ACOE) 119.98 w 

Eastern Calif. 

37.537N, 118.447W Left crest (1) Magnitude 6.5 ML 

Hidden Dam 37.112N 55.5 10.3 

(ACOE) 119.883W 

Left crest (1) 

Lake Success Dam 36.061N 

( ACOE) 118.920W 

Right abutment (3) (2) (1) 

Downstream (3) (2) (1) 

Slope (3) (2) ( 1) 

Right ere st 16.54 ( 1) 

Note: One each additional record1 recovered at slope and right crest 

at Lake Success Dam. 

Long Valley 37.567N 32.04 3.0 (1) Fire Station 118.757W 

(USGS) 

Table 1 23 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (az) amplitude (s) 

(0) (s) (.[) 

Long Va 11 ey Dam 37.588N (3) (2) Lake Crowley 118.705W 

(USGS) 

Left abutment 275 .15 3.8 

Up .11 2.6 

185 .36 4.5 

Note: One additional record1 recovered at Long Valley Dam left abutment. 

Me Gee Creek, SMA 37.550N 32.0 3.7 180 .09 

(USGS) 118.811W Up .06 

090 .07 

McGee Creek ,CRA 37.550N 55.5 1.1 

(USGS) 118.811W 

166 m downhole (1) 

35 m downhole ( 1) 

Surface 360 .09 

Up .06 

270 .08 

1 m downhole 180 .06 

Up .08 

270 inoperative 

Montgomery Pass 37.977N 37.84 4.8 360 .11 1.5 

Basa 1 t, Nevada 118.318W Up .07 

(USGS) 270 .11 1.7 

Pine Flat Dam 36.83 N (3) (2) (ACOE) 119.33 w 

Right abutment west (1) 

(Down stream) 

Terminus Dam 36.420N 

Main Dam 119.000W 

Right crest (3) (2) ( 1 ) 

Upper tower (3) (2) (1) 

Terminus dam 36.404N 

Auxiliary Dam 119.001W 

(ACOE) 

Center crest 50.24 (2) 320 .06 

Up .06 

230 .05 

Right abutment (3) (2) (1) 

24 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude ( s) 

(0) (s) (_gJ 

21 July 1986 McGee Creek, SMA 37.550N (3) (2) (1) 

1451:11.0 G.m.t. (USGS) 118.811W 

Eastern Calif. 

37.520N, 118.412W Me Gee Creek, CRA 37.550N (3) (2) 

Magnitude 5.7 ML (USGS) 118.811W 

166 m downhole (1) 

35 m downhole (1) 

Surface (1) 

1 m downhole (1) 

Montgomery Pass 37.977N 29.34 (2) (1) 

Basalt, Nevada 118.318W 

(USGS) 

Terminus Dam 36.404N 46.54 (2) 

Auxi 1 iary Dam 119.001W 

(ACOE) 

Center crest (1) 

21 July 1986 Long Valley Dam 37.588N 

2207:18.0 G.m.t. Lake Crowley 118. 705W 

Eastern Calif. (USGS) 

37.498N, 118.397W 

Magnitude 5.6 ML Left abutment (3) 3.7 275 .09 

Up .04 

185 .19 0.7 

Note: Six additional records 1 recovered at Long Valley Dam left abutment. 

Me Gee Creek, SMA 37.550N (3) (2) (1) 

(USGS) 118.811W 

Me Gee Creek, CRA 37.550N (3) (2) 

(USGS) 118.811W 

166 m downhole ( 1) 

35 m downhole ( 1) 

Surface ( 1) 

1 m downhole ( 1) 

Montgomery Pass 37.977N 31.54 (2) ( 1) 

Basalt, Nevada 118.318W 

(USGS) 

Table 1 25 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude (s) 

(0) (s) (.gJ 

Terminus Dam 36.404N 16.14 (2) Auxiliary Dam 119.001W 

(ACOE) 

Center crest (1) 

22 July 1986 Laws , Ca 1 if . 37.402N (3) (2) (1) 2017:00.1 G.m.t. Northeast Bishop 118. 346W 

Eastern Calif. (USGS) 

37.554N, 118.359W 

Magnitude 4.2 ML 

22 July 1986 Chalfant Valley 37.53 N 45.44 1.6 360 .06 

2206:41.8 G.m.t. Fire Station 118.37 w Up .05 

Eastern Calif. (USGS) 270 .08 

37.513N, 118.294W 

records 1 Magnitude 4.2 ML Note: 12 additional recovered at Chalfant Valley Fire Station. 

23 July 1986 Chalfant Valley 37.53 N 06.14 1.3 360 .07 

0508 G.m.t. Fire Station 118.37 w Up .04 

Eastern Calif. (USGS) 270 .05 

Epicenters and 

records 1 magnitudes unknown Note: 3 additional recovered at Cha 1 fant Va 11 ey Fire Station. 

23 July 1986 Chalfant Valley 37.53 N 16.54 2.1 360 .24 0.5 

1539:11:6 G.m.t. Fire Station 118.37 w Up .08 

Eastern Calif. (USGS) 270 .12 0.5 

37.517N, 118.409W 

records 1 Magnitude 4.7 MB Note: 11 additional recovered at Cha 1 fant Valley Fire Station. 

Hammi 1, Ca 1 if. 37 .68 N 17.04 2.4 (1) Cinnamon Ranch 118.39 w 

(USGS) 

24 July 1986 Cha 1 fan t Va 11 ey 37.53 N 57.44 0.6 360 .07 

1134:51.5 G.m.t. Fire Station 118.37 w Up . 01 

Eastern Calif. (USGS) 270 .03 

37.530N, 118.367W 

records 1 Magnitude 3.3 ML Note: 2 additional recovered at Chalfant Valley Fire Station. 

24 July 1986 Chalfant Valley 37.53 N 48.64 1.7 360 .09 

1458:45.2 G.m.t. Fire Station 118.37 w Up .07 

Eastern Calif. (USGS) 270 .05 

37.514N, 118.289W 

Magnitude 3.7 ML 

24 July 1986 Chalfant Valley 37.53 N 44.94 2.0 360 .18 0.3 

1644:40.7 G.m.t. Fire Station 118.37 w Up .07 

Eastern Calif. (USGS) 270 .10 1 peak 

37.529N, 118.398W 

Magnitude 3.5 ML 

26 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name 

(owner) 

Cha 1 fant Va 11 ey 

Fire Station 

(USGS) 

Station 

location 

( 0) 

Trigger S-minus Direction 

time trigger (az) 

(s) 

37.53 N 30.04 1.9 

118.37 w 

360 

Up 

270 

Maximum 

amp 1 it ude 

(_g_) 

.19 

.06 

.16 

Duration 

( s) 

0.2 

0.1 

24 July 1986 

1903:25.9 G.m.t. 

Eastern Calif. 

37.467N, 118.297W 

Magnitude 4.3 ML Note: 11 additional records 1 recovered at Chalfant Valley Fire Station. 

28 July 1986 Salton Sea 

2113 G.m.t. Wildlife Refuge 

Southern California 

Epicenter and 

magnitude unknown 

29 July 1986 

0643:50.2 G.m.t. 

Southern Calif. 

33.970N, 116.590W 

Magnitude 3.2 ML 

29 July 1986 

0957:57.0 G.m.t. 

Eastern Calif. 

37.593N, 118.447W 

Magnitude 4.6 ML 

30 July 1986 

0603:32.1 G.m.t. 

Eastern Calif. 

37.633N, 118.403W 

Magnitude 4.0 ML 

30 July 1986 

0641:52.7 G.m.t. 

Eastern Calif. 

37.562N, 118.424W 

Magnitude 4.8 ML 

22 July 1986-

Desert Hot Springs 

Mission Lakes C.C. 

(USGS) 

North Palm Springs 

Post Office 

(USGS) 

Whitewater Canyon 

Trout Farm 

(USGS) 

Hammi 1 , Ca 1 if. 

Cinnamon Ranch 

(USGS) 

Hammil, Cal if. 

Cinnamon Ranch 

(USGS) 

Hammil, Cal if. 

Cinnamon Ranch 

(USGS) 

Moran Spring 

(USGS) 

33.18 N 24.8 

115.62 w 

(USGS) 

33.986N 

116.535W 

33.924N 

116.543W 

52.3 

52.5 

33.989N 53.7 

116.655W 

37.68 N 

118.39 w 

37.68 N 

118.39 w 

37.68 N 

118.39 w 

58.84 

37.654N (3) 

118.594W 

(2) 

1.5 

2.0 

(2) 

2.1 

2.2 

0.5 

(2) 360 

Up 

270 

31 July 1986 

Eastern Calif. 

Epicenters and 

magnitudes unknown Note: Five additional records 1 recovered at Moran Spring. 

(1) 

(1) 

( 1) 

(1) 

(1) 

(1) 

(1) 

.06 

.04 

.03 

Table 1 27 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amp 1 it ude ( s) 

(0) (s) (]J 

South Hammil Valley 37.62 N (3) 2.1 360 .09 

White Mountain Ranch 118.39 w Up .04 

(USGS) 270 .05 

( 3) 1.6 360 .04 

Up .07 

270 .05 

(3) 0.7 360 .07 

Up .06 

270 .06 

Note: Four additional records1 recovered at White Mountain Ranch. 

31 July 1986 Ha mm i 1 , Ca 1 i f . 37.68 N 47.64 1.3 (1) 

0722:40.2 G.m.t. Cinnamon Ranch 118.39 w 

Eastern Calif. (USGS) 

37.463N, 118.374W 

47.3 Magnitude 4 5.8 ML McGee Creek, SMA 37.550N (2) (1) 

(USGS) 118.811W 

Me Gee Creek, CRA 37.550N 47.34 (2) 

(USGS) 118.811W 

166 m downhole (1) 

3 5 m down h o 1 e (1) 

Surface (1) 

1 m down ho 1 e (1) 

Moran Spring, Calif. 37.654N 46.24 (2) (1) 

(USGS) 118.594W 

Montgomery Pass 37.977N 01.54 (2) (1) 

Bas a 1t, Nevada 118.318W 

(USGS) 

Terminus Dam 36.420N (3) (2) Main Dam 119.000W 

( ACOE) 

Right crest (1) 

Upper tower (1) 

Terminus Dam 36.404N 16.14 (2) 

Auxiliary Dam 119.001W 

(ACOE) 

Center crest (1) 

28 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude (s) 

(0) (s) (_gJ 

31 July 1986 Desert Hot Springs 33.986N 44.8 (2) (1) 

0751:42.9 G.m.t. Mission Lakes C.C. 116.535W 

Southern Calif. (USGS) 

33.970N, 116.570W 

Magnitude 3.3 ML Whitewater Canyon 33.989N 47.2 (2) (1) 

Trout Farm 116.655W 

(USGS) 

1 August 1986 Cha 1 fant Va 11 ey 37.53 N 45.6 2.1 360 .06 

0634:42.9 G.m.t. Fire Station 118.37 w Up .01 

Eastern Calif. (USGS) 270 .04 

37.561N, 118.394W 

additional records 1 Magnitude 3.2 ML Note: Four recovered at Cha 1 fant Valley Fire Station. 

Laws , Ca 1 if . 37.402N 50.54 (2) (1) 

Northeast Bishop 118. 346W 

(USGS) 

1 August 1986 Chalfant Valley 37.53 N 17.8 0.5 360 .25 0.9 

1427:16.0 G.m.t. Fire Station 118.37 w Up .25 0.4 

E a stern Ca 1 i f . (USGS) 270 .23 0.8 

37.501N, 118.352W 

20.3 Magnitude 4 4.3 ML Hammil, Calif. 37.68 N 3.2 (1) Cinnamon Ranch 118.39 w 

(USGS) 

Laws , Ca 1 if . 37.402N 20.554 (2) (1) Northeast Bishop 118.346W 

(USGS) 

South Hammil Valley 37.62 N 18.94 1.9 (1) White Mountain Ranch 118.39 w 

(USGS) 

1 August 1986 Chalfant Valley 37.53 N 20.0 0.5 360 .40 1.4 

1428:18.0 G.m.t. Fire Station 118.37 w Up .30 3.0 

Eastern Calif. (USGS) 270 .29 1.5 

37.375N, 118.442W 

additional records Magnitude 1 4.7 ML Note: Six recovered at Chalfant Valley Fire Station. 

Laws , Cal if . 37.402N 21.14 0.8 360 .11 0.2 

Northeast Bishop 118. 346W Up .09 

(USGS) 270 .07 

South Hammil Valley 37.62 N 21.44 1.7 (1) White Mountain Ranch 118.39 w 

(USGS) 

2 August 1986 Whitewater Canyon 33.989N 05.3 (2) (1) 0505 G.m.t. Trout Farm 116.655W 

Southern Cal if. (USGS) 

Epicenter and 

magnitude unknown 

Table 1 29 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (a z) amplitude ( s) 

(0) (s) (.9_) 

2 August 1986 South Hammil Valley 37.62 N 38.54 1.4 360 .04 

1451:36.2 G.m.t. White Mountain Ranch 118.39 w Up .05 

Eastern Cal if. (USGS) 270 .05 

37.594N, 118.368W 

40.4 Magnitude 4 3.7 ML Hammi l , Calif. 37.68 N (2) (1) 

Cinnamon Ranch 118.39 w 

(USGS) 

3 August 1986 Chalfant Valley 37.53 N 32.3 1.2 360 .09 

0137 G.m.t. Fire Station 118.37 w Up .06 

Eastern Calif. (USGS) 270 .09 

Epicenters and 

records 1 magnitudes unknown Note: 15 additional recovered at Chalfant Valley Fire Station. 

3 August 1986 Bear Valley Station 1 36.573N 16.9 (2) (1) 

0900:13.6 G.m.t. CDF Fire Station 121.184W 

Central Calif. (USGS) 

36.592N, 121.233W 

Magnitude 2.9 ML Bear Valley Station 10 36.532N 16.6 1.7 310 .05 

Webb Residence 121.143W Up . 01 

(USGS) 220 .05 

3 August 1986 Laws, Cal if. 37.402N 12.94 0.6 (1) 

1033:04.5 G.m.t. Northeast Bishop 118 .346W 

Eastern Calif. (USGS) 

37.615N, 118.410W 

Magnitude 4.0 ML South Hammil Valley 37.62 N 06.8 360 .04 

White Mountain Ranch 118.39 w Up .06 

(USGS) 270 .04 

Hamm i l , Calif. 37.68 N 08.654 0.5 (1) 

Cinnamon Ranch 118.39 w 

(USGS) 

4 August 1986 Laws , Ca 1 i f . 37.402N 12.354 0.5 (1) 

1231:06.4 G.m.t. Northeast Bishop 118.346W 

E a s t e r n Ca l i f . (USGS) 

37.521N, 118.415W 

Magnitude 3.3 ML 

6 August 1986 Bear Valley Station 10 36.532N 50.0 1.8 (1) 

0452 G.m.t. Webb Residence 121.143W 

Centra 1 Ca l i f. (USGS) Epicenter and 

magnitude unknown 

6 August 1986 Whitewater Canyon 33.989N 32.7 (2) (1) 

1116 G.m.t. Trout Farm 116.655W 

Southern Calif. (USGS) 

Epicenter and 

magnitude unknown 

30 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Our at ion 

(owner) location time trigger ( az) amplitude (s) ( 0) (s) (_gJ 

10 August 1986 Laws , Ca l i f . 37.402N 43.454 0.6 (1) 

2014 G.m .t. Northeast Bishop 118.346W 

E a stern Ca l i f . (USGS) 

Epicenter and 

magnitude unknown 

11 August 1986 La ws , Ca l i f . 37.402N 52.784 (2) (1) 

0426 G.m.t. Northeast Bishop 118.346W 

Eastern Calif. (USGS) Epicenter and 

magnitude unknown 

12 August 1986 Chalfant Valley 37.53 N 49.54 1.3 360 .11 1 peak 

0929:48.0 G.m.t. Fire Station 118.37 w Up .06 

Eastern Cali f. (USGS) 270 .07 

37.487N, 118.377W 

One additional record1 Magnitude 3.5 ML Note: recovered at Chalfant va 11 ey Fire Station. 

12 August 1986 Laws , Ca 1 if. 37.402N 33.04 0.6 (1) 

1537:27.9 G.m.t. Northeast Bishop 118 .346W 

Eastern Cal if. (USGS) 

37.503N, 118.477W 

Magnitude 3.5 ML 

14 August 1986 La ws , Ca 1 i f . 37.402N 07.44 (2) (1) 0836 G.m.t. Northeast Bishop 118 .346W 

Eastern Calif. (USGS) Epicenter and 

magnitude unknown 

16 August 1986 Cha 1 fant Va 11 ey 37.53 N 58.14 1.4 360 .13 1 peak 

0948:56.1 G.m.t. Fire Station 118.37 w Up .04 

Eastern Calif. (USGS) 270 .09 

37.480N, 118.311W 

Magnitude 3.3 ML 

18 August 1986 Chalfant Valley 37.53 N 43.44 0.6 (1) 1049:38.9 G.m.t. Fire Station 118.37 w 

E a stern Ca l i f . (USGS) 

37.537N, 118.452W 

Magnitude 3.4 ML 

19 August 1986 Cha 1 fant Va 11 ey 37.53 N 41.44 1.5 360 .11 0.1 

2353:39.6 G.m.t. Fire Station 118.37 w Up .06 

E a s t e r n Ca 1 i f. (USGS) 270 .07 

37.482N, 118.372W 

42.8 Magnitude 4 3.4 ML Laws , Ca l i f . 37.402N (2) (1) Northeast Bishop 118 .346W 

(USGS) 

Table 1 31 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (az) amplitude (s) 

( 0) (s) (.9_) 

21 August 1986 McGee Creek, SMA 37.550N 25.6 (2) (1) 

1846 G.m.t. (USGS) 118.811W 

Eastern Calif. 

Epicenter and McGee Creek, CRA 37.550N 25.6 (2) magnitude unknown (USGS) 118.811W 

166 m downhole (1) 

35 m downhole (1) 

Surface (1) 

1 m downhole (1) 

23 August 1986 Chalfant Valley 37.53 N 32.04 1.4 360 .09 

0301:29.9 G.m.t. Fire Station 118.37 w Up .05 

Eastern Calif. (USGS) 270 .08 

37.528N, 118.331W 

33.7 Magnitude 4 3.5 ML Laws, Calif. 37.402N 1.2 (1) 

Northeast Bishop 118. 346W 

(USGS) 

25 August 1986 Hammi 1 , Ca 1 if. 37.68 N 02.54 0.3 ( 1 ) 

0820:58.0 Cinnamon Ranch 118.39 w 

Eastern Calif. (USGS) 

37.642N, 118.394W 

Magnitude 3.2 ML 

27 August 1986 South Hammil Valley 37.62 N 37.24 1.5 ( 1) 

0610 G.m.t. White Mountain Ranch 118.39 w 

Eastern Calif. (USGS) 

Epicenter and 

magnitude unknown 

29 August 1986 Desert Hot Springs 33.986N 56.6 1.5 360 .13 1 peak 

0746:53.3 G.m.t. Mission Lakes C.C. 116.535W Up .08 

Southern Calif. (USGS) 270 .12 1 peak 

33.953N, 116.623W 

Magnitude 4.0 ML North Palm Springs 33.924N 56.5 1.7 300 .14 0.1 

Post Office 116.543W Up .04 

(USGS) 210 .10 1 peak 

Whitewater Canyon 33.989N 57.9 (2) (1) 

Trout Farm 116.655W 

(USGS) 

Note: One additional record1 recovered at Whitewater Canyon Trout Farm. 

32 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude (s) 

(0) (s) (_gJ 

9 September 1986 Desert Hot Springs 33.986N 52.7 1.5 (1) 1622:50.6 G.m.t. Mission Lakes C.C. 116.535W 

Southern Ca 1 if. (USGS) 

33.970N, 116.570W 

Magnitude 3.5 ML North Palm Springs 33.924N 52.7 1.5 300 .05 

Post Office 116.543W Up .02 

(USGS) 210 .05 

16 September 1986 South Hammil Valley 37.62 N 45.14 (2) (1) 0007:41.2 G.m.t. White Mountain Ranch 118.39 w 

Eastern Calif. (USGS) 

37.625N, 118.455W 

Magnitude 3.3 ML 

16 September 1986 South Hammil Valley 37.62 N 47.24 0.5 ( 1) 0501:43.5 G.m.t. White Mountain Ranch 118.39 w 

E a s t e r n Ca l i f . (USGS) 

37.642N, 118.398W 

48.1 Magnitude 4 3.3 ML Hammil, Cal if. 37.68 N 0.5 (1) Cinnamon Ranch 118.39 w 

(USGS) 

16 September 1986 Hammi l , Cali f. 37.68 N 01.54 0.4 (1) 0636:57.8 G.m.t. Cinnamon Ranch 118.39 w 

Eastern Calif. (USGS) 

37.610N, 118.445W 

Magnitude 3.3 ML 

16 September 1986 South Hammil Valley 37.62 N 29.24 (2) (1) 1314:25.9 G.m.t. White Mountain Ranch 118.39 w 

Eastern Calif. (USGS) 

37.595N, 118.413W 

Magnitude 3.5 ML 

18 September 1986 Chalfant Valley 37.53 N 52.74 0.8 360 .05 

0759:47.5 G.m.t. Fire Stat ion 118.37 w Up .03 

Eastern Calif. (USGS) 270 .06 

37.632N, 118.392W 

51.7 Magnitude 4 4.1 ML Hammil, Calif. 37.68 N 0.5 (1) Cinnamon Ranch 118.39 w 

(USGS) 

Laws , Cal i f . 37.402N 55.74 (2) ( 1) 

Northeast Bishop 118 .346W 

(USGS) 

South Hammil Valley 37.62 N 50.84 0.6 360 .06 

White Mountain Ranch 118.39 w Up .05 

(USGS) 270 .06 

Table 1 33 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) 1 ocat ion time trigger ( az) amplitude ( s) 

(0) (s) (gJ 

23 September 1986 Bear Valley Station 12 36.658N 47.7 1.5 310 .05 

0619:46.2 G.m.t. Wi 11 iams Ranch 121.249W Up .01 

Ce n t r a 1 Ca 1 i f . (USGS) 220 .02 

36.635N, 121.292W 

Magnitude 2.5 ML 

28 September 1986 Desert Hot Springs 33.986N 31.7 (2) ( 1) 

0706:26.8 G.m.t. Mission Lakes C.C. 116.535W 

Southern Calif. (USGS) 

34.010N, 116.580W 

Magnitude 3.2 ML 

29 September 1986 Laws , Ca 1 i f . 37.402N 37.24 0.4 ( 1) 

0617:32.0 G.m.t. Northeast Bishop 118.346W 

Eastern Cal if. (USGS) 

37.514N, 118.398W 

Magnitude 3.4 ML 

1 October 1986 Honokaa, Hawaii 20.080N 30.74 (2) (1) 

0802 G.m.t. Police Station 155.465W 

Hawaii (USGS) 

Epicenter and 

17.9 magnitude 4 unknown H il o , Ha wa i i 19.731N 4.4 (1) 

U.S. Fish & Wildlife 155.100W 

(USGS) 

11 July 1986- Lorna Linda 34.05 N ( 3) (2) 

7 October 1986 VA Hospital 117.26 w 

Southern Calif. (VA/USGS) 

Epicenter and 

magnitude unknown Structure Array (1) 

9 October 1986 Laws , Ca 1 if . 37.402N 27.44 1.9 (1) 

0537:25.2 G.m.t. Northeast Bishop 118. 346W 

Eastern Ca 1 if. (USGS) 

37.358N, 118.335W 

Magnitude 4.2 ML 

15 October 1986 Desert Hot Springs 33.986N 50.0 1.5 360 .11 0.2 

0228:47.7 G.m.t. M i s s ion La ke s C. C. 116.535W Up .05 

Southern Calif. (USGS) 270 .09 

33.950N, 116.570W 

Magnitude 4.7 ML Morongo Va 11 ey 34.048N 50.1 2.1 135 .03 

Fire Station 116.577W Up .08 

(USGS) 045 .03 

North Palm Springs 33.924N 49.7 1.3 300 .15 0.3 

Post Office 116.543W Up .09 

(USGS) 210 .07 

34 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger ( az) amplitude ( s) 

(0) (s) (_gJ 

21 October 1986 Chalfant Valley 37.53 N 27.64 1.6 (1) 

0836:25.1 G.m.t. Fire Station 118.37 w 

Eastern Calif. (USGS) 

37.510N, 118.338W 

Magnitude 3.1 ML 

29 August 1986- Whitewater Canyon 33.989N (3) 0.5 (1) 23 October 1986 Trout Farm 116.655W 

Southern Calif. (USGS) Epicenter and 

magnitude unknown 

26 October 1986 Laws , Ca l i f . 37.402N 17.04 (2) (1) 1020:13.8 G.m.t. Northeast Bishop 118.346W 

Eastern Calif. (USGS) 

37.473N, 118.371W 

Magnitude 3.2 ML 

12 July 1986- Colton, Cali f. 34.06 N (3) (2) 30 October 1986 1-10/15 Interchange 117.30 w 

Southern Calif. (COOT) 

Epicenter and 

magnitude unknown Vault (1) 

17 November 1985 or Hawaii National Park 19.329N 25.64 1.3 

(1) 

1986; 0247 G.m.t. Wahaula Maint. Center 155.031W 

Hawaii (USGS) 

Epicenter and 

magnitude unknown 

17 November 1986 South Hammil Valley 37.62 N 25.94 1.4 (1) 1240:22.4 G.m.t. White Mountain Ranch 118.39 w 

Eastern Ca 1 if. (USGS) 

37 .571N, 118.415W 

Magnitude 3.5 ML 

21 November 1986 Eel River Valley Array 40.498N 11.6 (2) 360 .05 

2333:01.7 G.m.t. Bunker Hi 11 124.294W Up . 01 

Northern Calif. (USGS) 270 .05 

40.372N, 124.443W 

Magnitude 5.1 ML Eel River Valley Array 40.563N 08.9 4.1 360 .14 0.3 

Centerville Beach 124.348W Up .03 

(USGS) 270 .16 1 peak 

Eel River Valley Array 40.699N (3) (2) (1) College of the Redwoods 124.200W 

(USGS) 

Eel River Valley Array 40.576N (3) 5.0 360 .19 1 peak Ferndale Fire Station 124.262W Up .03 

(USGS) 270 .19 0.6 

Table 1 35 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum Duration 

(owner) location time trigger (a z) amplitude ( s) 

(0) (s) (_gJ 

Eel River Valley Array 40.599N (3) 1.4 360 .13 0.3 

Fortuna Fire Station 124.154W Up .03 

(USGS) 270 .28 0.5 

Eel River Valley Array 40.644N (3) 5.9 360 .06 

Loleta Fire Station 124.219W Up .03 

(USGS) 270 .08 

Eel River Valley Array 40.735N (3) (2) ( 1) 

South Bay Union School 124.207W 

(USGS) 

21 November 1986 Eel River Valley Array 40.498N 28.3 (2) ( 1) 

2334:18.0 G.m.t. Bunker Hill 124.294W 

Northern Calif. (USGS) 

40.367N, 124.450W 

Magnitude 5.1 ML Eel River Valley Array 40.563N 24.6 4.8 360 .21 0.3 

Centerville Beach 124.348W Up .05 

(USGS) 270 .10 0.1 

Eel River Valley Array 40.699N (3) 6.8 ( 1) 

College of the Redwoods 124.200W 

(USGS) 

Eel River Valley Array 40.576N (3) 5.5 360 .17 1 peak 

Ferndale Fire Station 124 .262W Up .04 

(USGS) 270 .11 0.1 

Eel River Valley Array 40.599N (3) 6.2 360 .16 0.3 

Fortuna Fire Station 124.154W Up .03 

(USGS) 270 .17 0.3 

Eel River Valley Array 40.644N ( 3) 6.5 360 .04 

Loleta Fire Station 124.219W Up .05 

(USGS) 270 .04 

Eel River Valley Array 40.735N (3) (2) ( 1) 

South Bay Union School 124.207W 

(USGS) 

24 November 1986 Bear Valley Station 1 36.573N 04.5 (2) (1) 

1508:01.3 G.m.t. CDF Fire Station 121.184W 

Central Calif. (USGS) 

36.597N, 121.242W 

Magnitude 3.1 ML 

8 December 1986 Stillwater, Nevada 39.518N 08.44 ( 2) (1) 

1727 G.m.t. Wildlife Refuge 118.510W 

Nevada (USGS) 

Epicenter and 

magnitude unknown 

36 Catalogue of U.S. Geological Survey Strong-Motion Records, 1986 
Table 1. Catalogue of National Strong-Motion Instrumentation Network accelerograph records recovered during 1986-Continued 

Earthquake Station name Station Trigger S-minus Direction Maximum 

(owner) location time trigger (a z) amplitude 

(0) (s) (_gJ 

17 November 1985- Waimea, Hawaii 20.03 N (3) (2) (1) 

11 December 1986 Fire Stat ion 155.66 w 

Hawaii (USGS) 

Epicenters and 

additional records magnitudes 1 unknown Note: Two recovered at Waimea Fire Station. 

25 December 1986 South Hammil Valley 37.62 N 58.04 1.4 (1) 

0608:54.4 G.m.t. White Mountain Ranch 118.39 w 

Eastern Cal if. (USGS) 

37.570N, 118.407W 

Magnitude 3.5 ML 

26 December 1986 Chalfant Valley 37.53 N 30.94 1.4 (1) 

0956:27.4 G.m.t. Fire Station 118.37 w 

Eastern Calif. (USGS) 

37.557N, 118.371W 

31.1 Magnitude 4 3.9 ML South Hammil Valley 37.62 N (2) (1) White Mountain Ranch 118.39 w 

(USGS) 

29 December 1986 San Jose, 101/280/680 37.340N 08.8 2.3 (1) 1528:04.9 G.m.t. Freeway Interchange 121.851W 

Central Calif. (USGS/COOT) 

37.458N, 121.800W 

Magnitude 4.5 ML 

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

2Questionable or indeterminable. 

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

correlation of accelerogram with event may be questionable. 

4Internal clock time; accuracy is variable. 

Duration 

( s) 

Table 1 37 
GPO 685-041/9792 
SELECTED SERIES OF U.S. GEOLOGICAL SURVEY PUBLICATIONS 

Periodicals 

Earthquakes & Volcanoes (issued bimonthly). 

Preliminary Determination of Epicenters (issued monthly). 

Technical Books and Reports 

Professional Papers are mainly comprehensive scientific reports of 

wide and lasting interest and importance to professional scientists and engineers. Included are reports on the results of resource studies and of 

topographic, hydrologic, and geologic investigations. They also include 

collections of related papers addressing different aspects of a single scientific topic. 

Bulletins contain significant data and interpretations that are of lasting scientific interest but are generally more limited in scope or 

geographic coverage than Professional Papers. They include the results 

of resource studies and of geologic and topographic investigations; as well 

as collections of short papers related to a specific topic. 

Water-Supply Papers are comprehensive reports that present significant interpretive results of hydrologic investigations of wide interest 

to professional geologists, hydrologists, and engineers. The series covers 

investigations in all phases of hydrology, including hydrogeology, 

availability of water, quality of water, and use of water. 

Circulars present administrative information or important scientific 

information of wide popular interest in a format designed for distribution 

at no cost to the public. Information is usually of short-term interest. 

Water-Resources In vestlgations Reports are papers of an interpretive nature made available to the public outside the formal USGS publications series. Copies are reproduced on request unlike formal USGS 

publications, and they are also available for public inspection at 

depositories indicated in USGS catalogs. 

Open-File Reports include unpublished manuscript reports, maps, 

and other material that are made available for public consultation at 

depositories. They are a nonpermanent form of publication that may be 

cited in other publications as sources of information. 

Maps 

Geologic Quadrangle Maps are multicolor geologic maps on 

topographic bases in 7 1/2- or 15 -minute quadrangle formats (scales mainly 1:24,000 or 1 :62,500) showing bedrock, surficial, or engineering geology. Maps generally include brief texts; some maps include structure 

and columnar sections only. 

Geophysical Investigations Maps are on topographic or planimetric 

bases at various scales; they show results of surveys using geophysical 

techniques, such as gravity, magnetic, seismic, or radioactivity, which 

reflect subsurface structures that are of economic or geologic significance. 

Many maps include correlations with the geology. 

Miscellaneous Investigations Series Maps are on planimetric or 

topographic bases of regular and irregular areas at various scales; they 

present a wide variety of format and subject matter. The series also includes 7 1/2-minute quadrangle photo geologic maps on planimetric bases 

which show geology as interpreted from aerial photographs. Series also 

includes maps of Mars and the Moon. 

Coal Investigations Maps are geologic maps on topographic or 

planimetric bases at various scales showing bedrock or surficial geology, stratigraphy, and structural relations in certain coal-resource areas. 

Oil and Gas Investigations Charts show stratigraphic information 

for certain oil and gas fields and other areas having petroleum potential. 

Miscellaneous Field Studies Maps are multicolor or black-andwhite maps on topographic or planimetric bases on quadrangle or irregular areas at various scales. Pre-1971 maps show bedrock geology 

in relation to specific mining or mineral-deposit problems; post-1971 

maps are primarily black-and-white maps on various subjects such as 

environmental studies or wilderness mineral investigations. 

Hydrologic Investigations Atlases are multicolored or black-andwhite maps on topographic or planimetri<.. bases presenting a wide range 

of geohydrologic data of both regular and irregular areas; principal scale 

is 1:24,000 and regional studies are at 1:250,000 scale or smaller. 

Catalogs 

Permanent catalogs, as well as some others, giving comprehensive listings of U.S. Geological Survey publications are available under 

the conditions indicated below from the U.S. Geological Survey, Books 

and Open-File Reports Section, Federal Center, Box 25425, Denver, 

CO 80225. (See latest Price and Availability List) 

"Publications of the Geological Survey, 1879- 1961" may be purchased by mail and over the counter in paperback book form and as a 

set of microfiche. 

"Publications of the Geological Survey, 1962-1970" may be purchased by mail and over the counter in paperback book form and as a 

set of microfiche. 

"Publications of the U.S. Geological Survey, 1971-1981" may be 

purchased by mail and over the counter in paperback book form (two 

volumes, publications listing and index) and as a set of microfiche. 

Supplements for 1982, 1983, 1984, 1985, 1986, and for subsequent 

years since the last permanent catalog may be purchased by mail and 

over the counter in paperback book form. 

State catalogs, "List of U.S. Geological Survey Geologic and 

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" 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 older catalogs, 

announcements, and publications may be incorrect. Therefore, the 

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

and publications.