NSMP Recordings from
Selected U.S. Earthquakes: 1932-2001
| Year |
Magnitude |
Location |
Comments |
1933 |
6.3 |
Long Beach,
CA |
first US accelerograms; >0.2g horiz. ground
motion at Long Beach and Vernon |
1940 |
7.0 |
El Centro,
CA |
famous "El Centro" accelerogram; 25
sec strong duration (>0.1 g) |
1949 |
7.1 |
Puget Sound,
WA |
0.2 g at 20-km distance |
1952 |
7.7 |
Kern County,
CA |
22 recordings; 0.22 g at 50-km distance |
1966 |
5.5 |
Parkfield,
CA |
15 recordings, 5 within 16 km of rupture; short
duration; high accel.; rapid atten. |
1971 |
6.4 |
San Fernando,
CA |
more than 225 accelerograms, many from severely
damaged structures |
1975 |
7.2 |
Hawaii,
HI |
maximum accel. 0.22 g at 43 km distance |
1979 |
5.7 |
Gilroy,
CA |
triggered 10-km long, 6-station, Gilroy Array;
many records with absolute timing |
1979 |
6.5 |
Imperial Valley,
CA |
7 records >0.5 g @ <10 km; >250
aftershock records; triggered 13-station array with absolute timing; 1000' digital array
triggered; instrumented structure damaged |
1983 |
6.7 |
Coalinga,
CA |
37 recordings, 12 within 20-km distance |
1984 |
6.1 |
Morgan Hill,
CA |
8 sec >0.1 g on dam crest, max accel 0.63 g |
1987 |
5.9 |
Whittier,
CA |
>100 records, 7 extensively instrumented
structures including a base-isolated bridge |
1989 |
6.9 |
Loma Prieta,
CA |
150 records, extensively instrumented San
Francisco Bay Area structures including 5 buildings, 1 dam |
1992 |
7.1 |
Petrolia,
CA |
triggered 8-station Array, 0.15-0.48 g |
1992 |
7.5 |
Landers,
CA |
more than 550 data channels from 155 sites |
1994 |
6.7 |
Northridge,
CA |
140 records, 10 structures (2 base-isolated) |
| 1999 |
7.1 |
Hector
Mine, CA |
> 80 records from 67 to 244 km distance |
| 2001 |
6.8 |
Nisqually,
WA |
>40 records from 13 to 251 km distance; 14
records obtained in near-real time (< 5 minutes) from NSMP dial-up acquisition system |
Return to
the NSMP Homepage |
