USGS National-Strong Motion Program
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
April 24, 2007, The Geysers, California Earthquake (posted 04/26/2007; updated 12/28/2007)
Mw 4.4, 04/24/2007, 21:08 UTC, 04/24/2007, 02:08 PM PDT, 38.796 N, 122.794 W, 1.7 km depth, Regional Network ID# nc51181154
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	K2	3432	CA: Cobb	Calpine	38.8387	-122.7528	5.9	37	1	EpiSen	90	111.0	3.86	20.30	1.070	0.157
									2	EpiSen	360	-92.3	2.86	15.50	0.863	0.108
									3	EpiSen	UP	-37.6	-0.67	3.57	0.255	0.025
ADSP	Etna	3433	CA: Anderson Springs	Calpine	38.7742	-122.7056	8.1	107	1	EpiSen	90	42.2	-0.71	3.50	0.281	0.036
									2	EpiSen	360	-55.8	-1.03	3.16	0.202	0.029
									3	EpiSen	UP	-36.1	-0.63	1.51	0.133	0.022
1216	Etna	2122	CA:Warm Springs Dam	ACOE	38.7162	-123.0022	20	244
			Right abutment, downstream						1	EpiSen	90	6.9	-0.26	1.63	0.131	0.041
			Right abutment, downstream						2	EpiSen	360	-5.8	-0.24	2.60	0.133	0.052
			Right abutment, downstream						3	EpiSen	UP	2.4	-0.12	1.19	0.098	0.018
1216	Etna	1695	CA:Warm Springs Dam	ACOE	38.7171	-123.0089	21	245
			Crest						1	EpiSen	90	-7.0	-0.35	1.76	0.390	0.051
			Crest						2	EpiSen	360	4.4	0.29	1.72	0.419	0.059
			Crest						3	EpiSen	UP	-5.0	-0.29	1.56	0.169	0.028
1764	Etna	2032	CA: St Helena; Fire Sta # 17	USGS	38.507	-122.471	42.7	139	1	EpiSen	90	-5.3	0.21	1.14	0.088	0.019
									2	EpiSen	360	-4.2	-0.17	0.89	0.058	0.012
									3	EpiSen	UP	-1.1	-0.07	0.39	0.033	0.011
1765	Etna	2016	CA: Napa; Fire Station # 3	USGS	38.330	-122.318	66.3	141	1	EpiSen	90	1.6	-0.09	0.38	0.071	0.034
									2	EpiSen	360	-1.3	0.07	0.56	0.056	0.022
									3	EpiSen	UP	-0.5	-0.03	0.19	0.045	0.007