USGS National-Strong Motion Program
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
July 30, 2003, Healdsburg, CA Earthquake (posted 07/30/2003; updated 01/26/2004)
ML 4.0, 07/30/2003, 04:50 UTC, 07/29/2003, 09:50 PM PDT, 38.679 N, 122.910 W, 5.4 km depth
Sta	Inst	Inst	State: City; Recorder Location	Owner	Lat	Lon	Dist	Az	Ch	Sensor	Orient	PGA	PGV	PSA at:
No	type	S/N			deg	deg	km	deg	No	type	deg	cm/s/s	cm/s	0.3 s	1.0 s	3.0 s
1744	Etna	2587	CA: Healdsburg; Fire Station	USGS	38.6162	-122.8723	7.7	155	1	EpiSen	90	-23.8	0.8	3.89	0.530	0.0327
									2	EpiSen	360	-24.6	0.7	3.45	0.835	0.0298
									3	EpiSen	UP	11.1	-0.3	1.37	0.179	0.0118
1216	Etna	1694	CA: Warm Springs Dam; Downstream	ACOE	38.7160	-122.9964	8.6	299	1	EpiSen	90	-12.2	-0.6	3.46	0.344	0.0198
									2	EpiSen	360	-16.3	-0.7	4.93	0.493	0.0332
									3	EpiSen	UP	-9.4	0.5	3.23	0.290	0.0169
1216	Etna	2122	CA: Warm Springs Dam; Rt Abutment-DS	ACOE	38.7162	-123.0022	9.0	297	1	EpiSen	90	29.1	-1.2	12.40	0.335	0.0329
									2	EpiSen	360	23.6	-0.9	5.64	0.337	0.0327
									3	EpiSen	UP	-12.8	0.5	2.65	0.234	0.0124
1216	Etna	2121	CA: Warm Springs Dam; Toe	ACOE	38.7190	-123.0033	9.3	299	1	EpiSen	90	11.4	-0.5	1.74	0.240	0.0202
									2	EpiSen	360	-17.3	-0.7	4.76	0.297	0.0350
									3	EpiSen	UP	8.7	0.3	2.65	0.205	0.0128
1216	Etna	2119	CA: Warm Springs Dam; Rt Abutment	ACOE	38.7138	-123.0089	9.4	294	1	EpiSen	90	11.6	0.4	1.81	0.349	0.0214
									2	EpiSen	360	10.9	-0.3	1.78	0.301	0.0296
									3	EpiSen	UP	4.0	0.2	0.83	0.116	0.0076
1216	Etna	1695	CA: Warm Springs Dam; Crest	ACOE	38.7171	-123.0089	9.6	296	1	EpiSen	90	-22.1	1.2	5.09	0.832	0.0547
									2	EpiSen	360	-16.3	-1.0	3.78	0.657	0.0624
									3	EpiSen	UP	17.3	-0.8	4.67	0.320	0.0234
1216	Etna	2120	CA: Warm Springs Dam; Lt Abutment	ACOE	38.7226	-123.0080	9.8	300	1	EpiSen	90	9.8	-0.6	3.62	0.450	0.0200
									2	EpiSen	360	-11.5	-0.5	3.23	0.443	0.0308
									3	EpiSen	UP	7.6	0.3	2.26	0.195	0.0156