USGS National-Strong Motion Program
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
October 19, 2005, The Geysers, California Earthquake (posted 10/20/2005)
Mw 4.0, 10/19/2005, 00:05 UTC, 10/18/2005, 05:05 PM PDT, 38.837 N, 122.882 W, 2.6 km depth, Regional Network ID# nc51165419
Sta Inst Inst State: City; Recorder Location Owner Lat Lon Dist Az Ch Sensor Orient PGA PGV PSA at:
Code type S/N     deg deg km deg No type deg cm/s/s cm/s 0.3 s 1.0 s 3.0 s
COB Etna 3432 CA: Geysers; Cobb CALPINE 38.8387 -122.7528 11.2 89 1 EpiSen 90 9.22 -0.177 0.93 0.165 0.0110
                  2 EpiSen 360 7.83 -0.348 2.00 0.236 0.0216
                  3 EpiSen UP 5.72 -0.163 0.74 0.116 0.0086
ADSP Etna 3433 CA: Geysers; Anderson Springs CALPINE 38.7742 -122.7056 16.8 114 1 EpiSen 90 -8.41 0.155 0.29 0.049 0.0065
                  2 EpiSen 360 -8.37 -0.164 0.51 0.058 0.0057
                  3 EpiSen UP -4.77 -0.069 0.21 0.034 0.0034