The Pacific Northwest Seismograph Network PNW EARTHQUAKE INFORMATION Strong Motion Information

Magnitude	Date	Latitude	Longitude	Depth
3.0	2002/07/03 12:22 UTC	48.9398	-123.0663	17.26

Contents

Maps

Shake Map Instrumental Intensity, peak accelerations, peak velocities.

Strong Motion Parameters

Strong Motion Parameters for each component of each station

STA	COMP	Dist (km)	PGA (%g)	PGV (cm/sec)
UWFH	ELE	44	0.1422	0.0221
UWFH	ELN	44	0.1082	0.0184
UWFH	ELZ	44	0.0671	0.0126
SBES	ELE	51	0.0152	0.0064
SBES	ELN	51	0.0112	0.0058
SBES	ELZ	51	0.0107	0.0037
ERW	ELE	63	0.0093	0.0028
ERW	ELN	63	0.0078	0.0051
ERW	ELZ	63	0.0069	0.0030
ERW	HHE	63	0.0098	0.0021
ERW	HHN	63	0.0076	0.0037
ERW	HHZ	63	0.0075	0.0012
MBKE	ELE	68	0.0139	0.0055
MBKE	ELN	68	0.0172	0.0047
MBKE	ELZ	68	0.0121	0.0069
SVOH	ELE	79	0.0168	0.0070
SVOH	ELN	79	0.0185	0.0051
SVOH	ELZ	79	0.0437	0.0084
SQM	BHE	96	0.0380	0.0063
SQM	BHN	96	0.0194	0.0038
SQM	BHZ	96	0.1082	0.0158
SQM	SLE	96	0.0369	0.0076
SQM	SLN	96	0.0189	0.0038
SQM	SLZ	96	0.0921	0.0162
OPC	BHE	97	0.0184	0.0052
OPC	BHN	97	0.0126	0.0052
OPC	BHZ	97	0.0257	0.0049
OPC	SLE	97	0.0163	0.0044
OPC	SLN	97	0.0132	0.0050
OPC	SLZ	97	0.0358	0.0056
ATES	ELE	108	0.0295	0.0099
ATES	ELN	108	0.0285	0.0082
ATES	ELZ	108	0.0385	0.0056
SWID	ELE	114	0.0086	0.0052
SWID	ELN	114	0.0075	0.0054
SWID	ELZ	114	0.0190	0.0045
EVCC	ELE	122	0.0104	0.0050
EVCC	ELN	122	0.0151	0.0062
EVCC	ELZ	122	0.0132	0.0059
BEVT	ELE	128	0.0106	0.0033
BEVT	ELN	128	0.0057	0.0041
BEVT	ELZ	128	0.0076	0.0034
LEOT	ELE	148	0.0049	0.0056
LEOT	ELN	148	0.0065	0.0053
LEOT	ELZ	148	0.0079	0.0032
FINN	ELE	149	0.0030	0.0052
FINN	ELN	149	0.0022	0.0036
FINN	ELZ	149	0.0028	0.0044
EARN	ELE	153	0.0035	0.0048
EARN	ELN	153	0.0043	0.0052
EARN	ELZ	153	0.0030	0.0042
BABE	ELE	154	0.0019	0.0057
BABE	ELN	154	0.0017	0.0056
BABE	ELZ	154	0.0022	0.0044
GNW	BHE	154	0.0011	0.0003
GNW	BHN	154	0.0013	0.0002
GNW	BHZ	154	0.0017	0.0005
GNW	SLE	154	0.0011	0.0004
GNW	SLN	154	0.0016	0.0004
GNW	SLZ	154	0.0020	0.0008
SP2	HHE	166	0.0041	0.0015
SP2	HHN	166	0.0037	0.0016
SP2	HHZ	166	0.0040	0.0009
TTW	BHE	172	0.0084	0.0028
TTW	BHN	172	0.0064	0.0017
TTW	BHZ	172	0.0056	0.0017
TTW	SLE	172	0.0088	0.0029
TTW	SLN	172	0.0073	0.0018
TTW	SLZ	172	0.0064	0.0018
ELW	ELE	184	0.0025	0.0018
ELW	ELN	184	0.0033	0.0019
ELW	ELZ	184	0.0038	0.0024
ELW	HHE	184	0.0025	0.0006
ELW	HHN	184	0.0031	0.0007
ELW	HHZ	184	0.0035	0.0006
PAYL	ELE	202	0.0024	0.0041
PAYL	ELN	202	0.0036	0.0044
PAYL	ELZ	202	0.0040	0.0033
RWW	BHE	223	0.0003	0.0002
RWW	BHN	223	0.0003	0.0002
RWW	SLE	223	0.0003	0.0004
RWW	SLN	223	0.0004	0.0005
RWW	SLZ	223	0.0003	0.0003
LON	BHE	261	0.0008	0.0002
LON	BHN	261	0.0005	0.0001
LON	BHZ	261	0.0005	0.0001
LON	SLE	261	0.0008	0.0003
LON	SLN	261	0.0007	0.0004
LON	SLZ	261	0.0007	0.0002

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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