Magnitude 3.7 quake near San Diego

Last updated: 2014-10-13 21:29:10 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 California (see map).

On Saturday, August 31, 2002 at 10:24:34 (PST) we recorded a quake (preliminary ml 3.7) located near the cities of Westmorland and Brawley. No felt reports as yet. A series of aftershocks followed the main event.

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 0.2 degrees (17.04 km).

This map shows the mainshock and the largest magnitude aftershock (red stars). Anza network stations are blue triangles.

Global mecator event map
Latitude Longitude Origin time (UTC) Depth ml Author
33.0786 -115.6124 8/31/2002 (243) 14:55:51 24.4 2.94* UCSD:vladik
33.1080 -115.5919 8/31/2002 (243)15:15:30 13.6 2.53* UCSD:vladik
33.0911 -115.6204 8/31/2002 (243) 15:27:34 7.4 1.79* UCSD:vladik
33.0684 -115.6008 8/31/2002 (243) 16:24:32 22.9 3.81* UCSD:vladik
33.0411 -115.6360 8/31/2002 (243) 16:43:07 23.9 1.68* UCSD:vladik
33.0588 -115.6145 8/31/2002 (243) 16:43:28 22.5 2.20* UCSD:vladik
33.0682 -115.6231 8/31/2002 (243) 16:51:46 20.2 2.60* UCSD:vladik
33.0534 -115.6229 8/31/2002 (243) 16:52:04 21.5 2.83* UCSD:vladik
33.0607 -115.5997 8/31/2002 (243) 16:56:35 24.6 2.86* UCSD:vladik
33.0911 -115.6488 8/31/2002 (243) 17:05:58 14.0 2.59* UCSD:vladik
33.0863 -115.6111 8/31/2002 (243) 17:13:03 14.9 2.82* UCSD:vladik
33.0959 -115.5940 8/31/2002 (243) 17:23:20 16.9 2.63* UCSD:vladik
33.0935 -115.6476 8/31/2002 (243) 17:25:53 7.6 1.99* UCSD:vladik

*note that the location and magnitude determined for these events are preliminary and are subject to change upon further review of seismic data.

Visit the TRINET 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/2002/243/a/index.php [Last updated: 2014-10-13 21:29:10 UTC]