USGS National-Strong Motion Project
Preliminary Corrected Peak Ground Acceleration and Velocity and Pseudo-Spectral Acceleration Values for
August 22, 2011, Trinidad, Colorado Earthquake (posted 12/13/2011)
Mw 4.7, 08/22/2011, 23:30 UTC, 08/22/2011, 05:30 PM MDT, 37.029 N, 104.547 W, 5.2 km depth, Regional Network ID# usc0005ic9
Sta	Inst	Inst	State: City; Recorder Location	Owner	Lat	Lon	Dist	Az	Ch	Sensor	Orient	PGA	PGV	PSA 5% damping %g
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
2313	K2	2174	CO:Trinidad Dam; Tower Array	ACOE	37.1411	-104.5513	12.4	358
			Upper Tower						1	EpiSen	135	-12.4	0.809	2.33	0.525	0.0650
			Upper Tower						2	EpiSen	45	-9.2	0.507	2.16	0.399	0.0640
			Upper Tower						3	EpiSen	UP	-14.6	0.376	0.79	0.152	0.0915
			Lower Tower						4	EpiSen	135	-10.7	0.409	1.62	0.175	0.0393
			Lower Tower						5	EpiSen	45	5.4	0.253	1.75	0.224	0.0441
			Lower Tower						6	EpiSen	UP	3.0	0.156	0.59	0.139	0.0920
2313	Etna	4065	CO:Trinidad Dam; Rt Abutment, Downstream	ACOE	37.1428	-104.5473	12.6	360	1	EpiSen	90	-15.7	-0.383	1.27	0.217	0.0495
									2	EpiSen	360	19.5	-0.532	2.14	0.259	0.0294
									3	EpiSen	UP	-5.3	0.188	0.39	0.149	0.0905
2313	Etna	4064	CO:Trinidad Dam; Crest	ACOE	37.1432	-104.5522	12.7	358	1	EpiSen	135	-46.6	1.540	6.36	0.591	0.0516
									2	EpiSen	45	22.2	0.763	4.86	0.325	0.0539
									3	EpiSen	UP	23.3	-0.795	6.28	0.291	0.0912