Magnitude 3.8 quake near San Simeon, CA

Last updated: 2015-10-22 22:34:38 UTC

Global view of quake

 

The Anza group at the University of California San Diego operates a broadband seismograph network consisting of 17 three component broadband seismograph stations centered near Anza, California (see map).

On Wednesday, March 10th, 2004 at 11:00 PM (PST) we recorded a quake (preliminary ml 3.8) located near San Simeon.

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 are shown below. The epicentral distance (distance separating the epicenter and the closest station in the recording network) for Anza is 426 km (3.83 degrees).

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

Global mecator event map

Latitude Longitude Origin time (UTC) Origin time (PDT) Depth (km) ml Author
35.4161 -121.1646 03/11/04 (071) 07:00 03/10/04 (070) 23:00 18 3.8 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

Of local interest:
We operate a broadband station at Pinon Flat Observatory. At 7:01AM station PFO recorded the P wave from this event. Here is a view of that event as picked by our analyst. A pink "P" indicates a P wave arrival, a pink "S" indicates an S wave arrival.

3 component seismometer recordings at Pinon Flat Observatory

View a larger image showing the waveforms recorded at Pinon Flat Observatory.

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

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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/2004/071/a/index.php [Last updated: 2015-10-22 22:34:38 UTC]