Magnitude 3.17 quake near Sage, CA

Last updated: 2018-03-26 17:50:58 UTC

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The Anza group at the University of California San Diego operates a broadband seismograph network consisting of 14 (+ 2) three component broadband seismograph stations centered near Anza, California (see map).

On Thursday, October 31st, 2002 at 15:59 (PST) we recorded a quake (preliminary ml 3.17) located near the city of Sage.

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

View the most recent map of local events near San Diego or a slightly wider regional view of events recoded by ANZA, or a map of events recoded by ANZA from around the globe.

Initial source parameters for the recent event and aftershocks are shown below. The epicentral distance (distance separating the epicenter and the closest station in the recording network) for Anza is 0.113 (12.565035 km).

This map shows the mainshock (red star) and any associated aftershocks (orange stars). Anza network stations are blue triangles.

Latitude	Longitude	Origin time (UTC)	Origin time (PST)	Depth	ml	Author
33.5375	-116.9251	10/31/02 (304) 23:59:36.985	15:59 (PST)	8.4056	3.17*	UCSD:vladik

* The location and magnitude determined for this event are preliminary and are subject to change upon further review of seismic data.

You may also view a plot showing:

Download data:css3.0 miniSEED data for Anza

Of local interest

We operate a broadband station on Mt. Soledad. At 15:59 (PST) 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.

3 component seismometer recordings at Soledad

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 China/India/Pakistan).
Learn more about the ANZA network (includes more station information, research, etc).

URL: http://eqinfo.ucsd.edu/special_events/2002/304/a/index.php [Last updated: 2018-03-26 17:50:58 UTC]