The Pacific Northwest Seismograph Network PNW EARTHQUAKE INFORMATION Strong Motion Information

Magnitude	Date	Latitude	Longitude	Depth
6.8	2001/02/28 18:54 UTC	47.1490	-122.7267	51.90

Contents

Maps

Shake Map Instrumental Intensity, peak accelerations, peak velocities.

Strong Motion Parameters -- Updated 3/6/03 Earlier Version

Strong Motion Parameters for each component of each station

STA	COMP	Dist (km)	PGA (%g)	PGV (cm/sec)
MURR	ENE	13	6.9008	6.9591
MURR	ENN	13	5.3334	3.2243
MURR	ENZ	13	13.0292	2.3255
UPS	ENE	22	5.5065	7.4591
UPS	ENN	22	6.0685	5.6499
UPS	ENZ	22	5.4854	2.4325
PCFR	ENE	28	11.0286	13.1762
PCFR	ENN	28	13.0822	7.0981
PCFR	ENZ	28	14.0883	4.1461
TBPA	ENE	30	6.3894	10.8870
TBPA	ENN	30	6.4887	9.2583
TBPA	ENZ	30	4.6570	5.1935
PCEP	ENE	33	20.3866	13.4822
PCEP	ENN	33	21.3311	10.4621
PCEP	ENZ	33	15.4754	6.0601
KIMR	ENE	40	16.2798	9.5760
KIMR	ENN	40	15.0153	8.7222
KIMR	ENZ	40	7.0457	3.8001
PCMD	ENE	43	15.7627	9.4341
PCMD	ENN	43	11.0447	7.0099
PCMD	ENZ	43	6.7581	3.5914
GNW	SNE	47	15.9071	5.0740
GNW	SNN	47	8.0975	4.1126
GNW	SNZ	47	6.1925	1.5677
RBEN	ENE	52	10.9704	8.2588
RBEN	ENN	52	10.9338	7.4445
RBEN	ENZ	52	4.5480	2.8964
HOLY	ENE	53	8.1242	5.7131
HOLY	ENN	53	9.5338	10.7877
HOLY	ENZ	53	6.1913	4.3704
MPL	ENE	54	9.7700	7.3438
MPL	ENN	54	8.1212	7.7938
MPL	ENZ	54	4.9515	3.5493
TKCO	ENE	54	27.2786	21.8825
TKCO	ENN	54	17.0421	13.5054
TKCO	ENZ	54	7.7736	6.6989
KIMB	ENE	57	13.5245	18.2648
KIMB	ENN	57	9.2459	10.9496
KIMB	ENZ	57	4.7101	7.0601
SP2	ENE	58	30.7712	20.1139
SP2	ENN	58	18.9953	13.2034
SP2	ENZ	58	11.7015	5.6007
KITP	ENE	59	4.8237	5.6192
KITP	ENN	59	4.9300	7.4801
KITP	ENZ	59	2.6688	5.2385
RHAZ	ENE	60	4.5405	4.1627
RHAZ	ENN	60	3.9328	4.4843
RHAZ	ENZ	60	3.6507	1.7391
QAW	ENE	61	10.4611	8.3858
QAW	ENN	61	11.3963	11.8658
QAW	ENZ	61	7.6498	6.3936
LAWT	ENE	62	10.4469	14.1012
LAWT	ENN	62	8.8904	12.1948
LAWT	ENZ	62	5.0959	3.5384
RAW	ENE	64	17.2679	16.9711
RAW	ENN	64	12.4675	10.6580
RAW	ENZ	64	5.5907	4.3713
RWW	SNE	65	7.5257	6.0160
RWW	SNN	65	6.2656	4.4100
RWW	SNZ	65	4.3353	3.4816
SEA	ENE	65	6.7188	7.4363
SEA	ENN	65	7.0604	7.3741
SEA	ENZ	65	3.5444	3.0666
WISC	ENE	66	11.3349	10.1155
WISC	ENN	66	9.4361	6.6778
WISC	ENZ	66	3.4447	3.0760
KINR	ENE	67	7.5467	4.9981
KINR	ENN	67	4.9382	6.5307
KINR	ENZ	67	3.1433	2.7624
NOWS	ENE	70	7.9761	9.8671
NOWS	ENN	70	8.7143	9.7132
NOWS	ENZ	70	2.8743	3.8580
PNLK	ENE	71	4.1044	5.5574
PNLK	ENN	71	6.2969	5.0049
PNLK	ENZ	71	4.3402	3.9724
FINN	ENE	74	5.1293	5.5685
FINN	ENN	74	6.0817	7.6421
FINN	ENZ	74	3.5848	2.3492
BRKS	ENE	75	7.7100	7.6886
BRKS	ENN	75	10.3841	10.9949
BRKS	ENZ	75	4.5836	2.4133
ELW	ENE	75	5.6341	4.1187
ELW	ENN	75	5.5382	4.0563
ELW	ENZ	75	3.4788	2.5074
ALCT	ENE	76	4.1550	6.4502
ALCT	ENN	76	4.3093	5.1946
ALCT	ENZ	76	3.5312	4.9238
CSEN	ENE	82	3.5900	4.0739
CSEN	ENN	82	3.8622	4.7562
CSEN	ENZ	82	2.1545	2.3979
LEOT	ENE	83	6.3701	6.3092
LEOT	ENN	83	7.5393	4.5625
LEOT	ENZ	83	3.9978	2.5000
LON	SNE	83	3.7462	3.0477
LON	SNN	83	2.8312	1.6528
LON	SNZ	83	1.5987	1.3141
EARN	ENE	84	6.9369	6.5115
EARN	ENN	84	5.6559	5.5364
EARN	ENZ	84	2.4020	2.2952
BEVT	ENE	92	4.8710	3.4933
BEVT	ENN	92	4.9543	4.4564
BEVT	ENZ	92	2.2583	2.0522
TTW	SNE	99	11.1749	8.0257
TTW	SNN	99	9.1449	4.9274
TTW	SNZ	99	7.1409	3.9511
MBPA	ENE	105	12.0089	5.2946
MBPA	ENN	105	15.4651	4.8901
MBPA	ENZ	105	4.9956	1.4900
SQM	SNE	106	3.8156	4.1303
SQM	SNN	106	2.5910	2.3860
SQM	SNZ	106	1.9533	1.7276
ALST	ENE	118	6.0834	4.8103
ALST	ENN	118	7.5766	5.1298
ALST	ENZ	118	2.3697	1.7742
ERW	ENE	145	0.9460	0.8639
ERW	ENN	145	0.8497	0.6474
ERW	ENZ	145	0.8471	0.7150
ROSS	ENE	165	1.8720	1.2355
ROSS	ENN	165	2.5429	1.2717
ROSS	ENZ	165	1.3268	0.6433
KEEL	ENE	178	1.4428	2.3134
KEEL	ENN	178	1.3635	1.8221
KEEL	ENZ	178	0.7195	0.9022
RBO	ENE	179	1.3488	2.0398
RBO	ENN	179	4.5903	5.2558
RBO	ENZ	179	0.7870	0.7810
CSO	ENE	182	1.3086	0.8153
CSO	ENN	182	1.0936	0.6003
CSO	ENZ	182	0.3688	0.1847
HAO	ENE	182	0.7613	0.6865
HAO	ENN	182	0.6448	0.5334
HAO	ENZ	182	0.4921	0.4726
SBES	ENE	182	0.6301	0.6420
SBES	ENN	182	0.5017	0.5226
SBES	ENZ	182	0.4800	0.3452
LANE	ENE	347	0.0856	0.2413
LANE	ENN	347	0.0856	0.2216
LANE	ENZ	347	0.0595	0.1365
ALVY	ENN	351	0.1153	0.2953
ALVY	ENZ	351	0.0557	0.1205
PIN	SNE	398	0.0615	0.1604
PIN	SNN	398	0.0419	0.0728
PIN	SNZ	398	0.0451	0.0907
DBO	SNE	450	0.0306	0.1234
DBO	SNN	450	0.0274	0.0842
DBO	SNZ	450	0.0213	0.0979

Parameter Definitions

• STA - The 3 or 4 letter station designation.
• COMP - Component flag. Each station has a tri-axial accelerometer for measuring motions in the vertical (Z), north-south (N) , and east-west (E) directions. The "EL" part of the component indicates that the data are from an accelerometer with a high sample rate (here 100 samples per second). A "BH" or "HH" indicates that the data are from a broadband velocity sensor. (The "HH" components usually have a 100 sps sample rate and the "BH" components are usually 40 or 50 sps).
• Dist - Surface distance from the earthquake epicenter to the recording station.
• PGA - Peak ground acceleration. The peak value from a single component (no vector sums). Values are expressed in percent g (acceleration due to gravity, 32 ft/sec/sec or 9.81 m/sec/sec).
• PGV - Peak ground velocity; determined by integrating the acceleration time-series using the trapezoidal rule.

Station Information

List showing station coordinates and sensor information.
Station Maps

The information presented in this document is preliminary. It will be modified after additional analysis of the accelerograms.

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