Magnitude 3.9 quake east of Alpine, California
Last updated: 2018-03-26 (84) 17:50:57 UTC
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- Location map
- Initial source parameters
- 3 components [closest Anza station]
- Vertical components [all Anza stations]
- Waveforms recorded at Mt. Soledad
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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 August 10 2013 at 7:09 AM (PDT) we recorded an earthquake (preliminary ml 3.9) located east of Alpine.
If you have felt this quake, the USGS would like to know. Please add your comments to the USGS page "Did you feel it?".
View the most recent map of local events near San Diego or a slightly wider regional view of events recorded by ANZA, or a map of events recorded by ANZA from around the globe.
Initial source parameters for this tremor are indicated below. The epicentral distance (i.e. the distance separating the epicenter and the closest station in the recording network) for Anza is 15 km (0.14 degrees).
This map shows the mainshock as a red star. Associated aftershocks are orange stars. Anza network stations are yellow triangles. Blue lines are major rivers. Thin black lines are state boundaries and thick black lines are national boundaries.
Event Map
Event Parameters
Latitude | Longitude | Origin time (UTC) | Origin time (PDT) | Depth (km) | ml | Author |
---|---|---|---|---|---|---|
32.8753 | -116.2588 | 08/10/13 (222) 14:09:18 | 08/10/13 (222) 7:09 AM | 5 | 3.9 | UCSD:jtytell |
* The location and magnitude determined for this event are preliminary and are subject to change upon further review of seismic data.
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Of local interest
We operate a broadband station on Mt. Soledad. At 07:09 (PDT) station SOL recorded the P wave from this event. Here is a view of that event as picked by our analyst. A red P indicates a P wave arrival, a red 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.
News Links
- USGS page for this event
- San Diego Union Tribune: "Cluster of small quakes rattles East County"
- Los Angeles Times: "Earthquake: 3.9 quake strikes in southern San Diego County"
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