Magnitude 6.8 quake near Nisqually, Seattle/Olympia, Washington

Last updated: 2018-03-26 17:50:59 UTC

The Anza group at the University of California San Diego operates a broadband seismograph network consisting of 13 (+ 2) three component broadband seismograph stations centered near Anza Californa (see map).

On Wednesday February 28th, 2001 around 10:54 PST we recorded a quake (preliminary ml 6.8) located near the city of Seattle. Preliminary reports say that damage has occurred in the Seattle area.

If you felt the quake, USGS would like to know. Add to the USGS "Did you feel it?" page.

View the most recent map of local events near San Diego or a map of events recoded by ANZA from around the globe. We also have a bulletin of recent events recorded by the Anza network.

Initial source parameters for the recent event and aftershocks are shown below. The epicentral distance (distance separating the epicenter and the recording network) for ANZA is 14.4 degrees (1595 km).

This map shows the mainshock (red circle). Anza network stations are blue triangles, KNET network stations are pink triangles. Backgound seismicity is also plotted.



Origin time




47.15 -122.720 2/28/2001 (059) 18:54:33 52.4 6.8* QED
47.20 -122.710 3/01/2001 (060) 9:10:21 52.0 3.4 QED

*note that the location and magnitude determined for this event is preliminary and is subject to change upon further review of seismic data.

You may also view a plot showing

Download data:
css3.0 miniSEED data for KNET or ANZA

Of local interest:
We operate a broadband station on Mt. Soledad. At 18:58:01 station SOL recorded the P wave from this event.

Here is a view of that event as picked by our analyst. The pink "P" indicates a P wave arrival, the "S" indicates an S wave arrival.

View a larger image showing the waveforms recorded at Mt. Soledad.

Visit the IRIS website with additional links to seismic data for this event.

Learn more about the Anza group (including who works here, other networks, nuclear tests in India  and Pakistan).
Learn more about the ANZA network (includes more station information, research, etc).

URL: [Last updated: 2018-03-26 17:50:59 UTC]