Strong Motion Information

The Pacific Northwest Seismograph Network

PNW EARTHQUAKE INFORMATION

Strong Motion Information

Magnitude: 3.6
Date and time: 1997/11/26 00:05 UTC
Latitude: 47.7892, Longitude: -123.0755
Hypocentral Depth: 46.46 km

NOTE: The above values may have been changed since this document was written

Accelerograms

Below are links to GIF format images (0.6 Mb) of the accelerograms. Peak acceleration values are listed on the right side of each accelerogram. (Vertical scale and peak values are too small by a factor of 2). The following stations have strong motion sensors:

MPL, Maple Valley Power Substation.
QAW, Queen Anne Hill, Seattle.
SEA, University of Washington, Seattle.
SPW, Seward Park, Seattle.

Strong Motion Parameters

Strong Motion Parameters for each component of each station
STA	COMP	Dist (km)	PGA (g)	Dur_rel (sec)	AI (sec)	SI(5%) (cm)	PGV (cm/sec)	F_d (Hz)	BW (Hz)
QAW	ELE	56.9	7.25e-04	23.8	1.14e-03	7.82e-02	2.04e-02	6.3	0.4
QAW	ELN	56.9	6.54e-04	27.8	9.02e-04	6.04e-02	2.89e-02	5.2	0.5
QAW	ELZ	56.9	5.10e-04	26.9	6.57e-04	4.04e-02	1.56e-02	5.4	0.5
SEA	ELZ	59.5	1.81e-04	192.9	1.76e-04	2.70e-02	9.12e-03	5.4	0.1
SEA	ELN	59.5	2.43e-04	211.1	7.72e-04	4.07e-02	1.29e-02	28.9	0.1
SEA	ELE	59.5	2.93e-04	210.3	1.34e-03	4.03e-02	1.22e-02	30.5	0.1
SEA	HHZ	59.5	1.91e-04	199.0	2.73e-04	2.55e-02	7.89e-03	28.9	0.1
SEA	HHN	59.5	2.67e-04	210.1	8.88e-04	3.68e-02	1.18e-02	28.9	0.1
SEA	HHE	59.5	2.86e-04	208.7	1.44e-03	3.85e-02	1.19e-02	30.5	0.1
SPW	ELZ	67.6	5.87e-04	22.4	3.34e-04	5.11e-02	2.60e-02	3.3	0.4
SPW	ELN	67.6	8.95e-04	20.0	6.46e-04	1.03e-01	3.83e-02	4.1	0.2
SPW	ELE	67.6	1.23e-03	13.8	1.06e-03	1.05e-01	6.47e-02	3.9	0.2
SPW	HHZ	67.6	1.03e-03	19.0	3.64e-04	4.82e-02	2.21e-02	3.3	0.2
SPW	HHN	67.6	8.29e-04	19.5	5.55e-04	9.41e-02	3.39e-02	4.1	0.1
SPW	HHE	67.6	1.82e-03	13.3	1.10e-03	1.06e-01	5.95e-02	3.9	0.2
MPL	ELE	75.9	4.74e-04	19.2	2.12e-04	3.92e-02	1.80e-02	4.7	0.4
MPL	ELN	75.9	3.65e-04	17.7	1.88e-04	3.50e-02	1.46e-02	4.0	1.5
MPL	ELZ	75.9	3.11e-04	21.1	1.12e-04	1.61e-02	6.74e-03	5.0	0.5
RWW	BHZ	98.4	1.90e-04	27.8	1.98e-05	8.16e-03	3.66e-03	4.0	0.0
RWW	BHN	98.4	1.72e-04	33.1	3.80e-05	1.28e-02	4.87e-03	4.4	0.0
RWW	BHE	98.4	1.61e-04	31.5	4.70e-05	1.65e-02	5.18e-03	3.0	0.0
TTW	BHZ	104.6	4.42e-04	19.5	1.52e-04	1.92e-02	1.30e-02	3.5	0.1
TTW	BHN	104.6	6.01e-04	12.0	2.79e-04	4.02e-02	2.20e-02	2.2	0.1
TTW	BHE	104.6	4.03e-04	20.5	2.60e-04	3.42e-02	1.50e-02	2.8	0.2
LON	BHZ	150.2	7.25e-05	25.4	6.52e-06	1.94e-03	1.21e-03	9.3	0.0
LON	BHN	150.2	1.51e-04	27.1	1.39e-05	3.30e-03	2.66e-03	5.0	0.0
LON	BHE	150.2	2.53e-04	16.8	1.84e-05	5.46e-03	4.09e-03	5.8	0.1

Last modified March 1, 1999

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

Back to
PNSN Strong Motion Home Page.
Dept. of Earth and Space Sciences.