Magnitude 7.50 quake near Southwestern Siberia, Russia

Last updated: 2018-03-26 17:50:56 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 Saturday, September 27th, 2003 at 4:33 AM (PDT) we recorded a quake (preliminary mb 7.50) located near Southwestern Siberia, Russia.

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 10430 km (93.83 degrees).

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

Global mecator event map

The image below shows an enlarged map of the region where the event occurred with the major population areas denoted by squares.

Local event map

Latitude Longitude Origin time (UTC) Origin time (PDT) Depth (km) mb Author
50.0600 87.7300 9/27/03 (270) 11:33 9/27/03 (270) 4:33 18 7.50* QED
50.2000 87.8100 9/27/03 (270) 13:16 9/27/03 (270) 06:16 33 5.70* QED
50.0800 87.8100 9/27/03 (270) 18:52 9/27/03 (270) 11:52 33 6.30* QED
50.1900 87.6700 10/01/03 (274) 01:03 09/30/03 (273) 18:03 10 6.7* USGS

* 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 on Mt. Soledad. At 04:46 (PDT) station SOL 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 Soledad

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

Visit the IRIS website or the USGS website for 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: [Last updated: 2018-03-26 17:50:56 UTC]