USGS National-Strong Motion Program
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
August 23, 2004, Willow, AK Earthquake (posted 03/25/2005)
ML 3.8, 08/23/2004, 07:19 UTC, 08/22/2004, 11:19 PM AKDT, 61.811 N, 149.909 W, 43.3 km depth, Regional Network ID# ak00039464
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
8040			AK: Anchorage; Atwood Building	USGS	61.2153	-149.893	66.4	179
	K2	2153	Basement, NW corner						1	EPI	90	-0.41	-0.015	0.07	0.012	0.0008
		2153	Basement, NW corner						2	EPI	360	0.58	0.016	0.06	0.012	0.0008
		2153	Basement, NW corner						3	EPI	UP	-0.48	0.013	0.07	0.005	0.0005
		2153	Basement, SW corner						4	EPI	UP	-0.47	0.013	0.09	0.006	0.0006
		2153	Level 1, West side						5	EPI	360	0.59	0.016	0.06	0.012	0.0009
		2153	no sensor						6
		2153	Basement, NE corner						7	EPI	UP	-0.46	0.013	0.07	0.005	0.0005
		2153	Level 1, East side						8	EPI	360	0.72	-0.020	0.07	0.012	0.0008
		2153	Level 1, East side						9	EPI	90	0.47	-0.016	0.08	0.011	0.0007
		2153	Level 2, West side						10	EPI	360	-0.68	-0.022	0.09	0.012	0.0008
		2153	Level 2, East side						11	EPI	360	-0.75	-0.019	0.10	0.011	0.0011
		2153	Level 2, East side						12	EPI	90	-0.58	0.023	0.11	0.013	0.0008
	K2	2154	Level 7, West side						1	EPI	360	-0.55	0.023	0.19	0.013	0.0012
		2154	Level 7, East side						2	EPI	360	0.55	-0.026	0.20	0.015	0.0013
		2154	Level 7, East side						3	EPI	90	-0.62	-0.030	0.15	0.020	0.0017
		2154	Level 8, West side						4	EPI	360	-0.58	-0.027	0.17	0.013	0.0014
		2154	Level 8, East side						5	EPI	360	-0.59	0.025	0.16	0.015	0.0018
		2154	Level 8, East side						6	EPI	90	-0.59	-0.028	0.13	0.020	0.0017
		2154	Level 13, West side						7	EPI	360	0.54	0.025	0.16	0.009	0.0022
		2154	Level 13, East side						8	EPI	360	0.49	0.022	0.18	0.009	0.0021
		2154	Level 13, East side						9	EPI	90	0.48	0.026	0.13	0.014	0.0021
		2154	Level 14, West side						10	EPI	360	0.45	-0.024	0.21	0.009	0.0025
		2154	Level 14, East side						11	EPI	360	0.45	0.021	0.21	0.009	0.0026
		2154	Level 14, East side						12	EPI	90	-0.42	0.022	0.13	0.011	0.0024
	K2	2155	Level 19, West side						1	EPI	360	0.40	0.026	0.06	0.014	0.0032
		2155	Level 19, East side						2	EPI	360	-0.42	0.030	0.08	0.019	0.0030
		2155	Level 19, East side						3	EPI	90	-0.37	-0.022	0.08	0.016	0.0034
		2155	Level 20, West side						4	EPI	360	0.43	0.032	0.14	0.016	0.0033
		2155	Level 20, East side						5	EPI	360	0.44	0.037	0.18	0.021	0.0034
		2155	Level 20, East side						6	EPI	90	-0.48	-0.029	0.13	0.020	0.0034
		2155	Roof, West side						7	EPI	360	-0.87	0.036	0.23	0.018	0.0035
		2155	Roof, East side						8	EPI	360	-1.10	0.044	0.25	0.023	0.0035
		2155	Roof, East side						9	EPI	90	-0.87	0.043	0.22	0.026	0.0041