Magnitude 4.9 quake near San Clemente Island, California

Last updated: 2018-03-26 17:50:59 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 Sunday, October 16, 2005 at 2:11 PM (PDT) we recorded a quake (preliminary ml 4.9) located near San Clemente Island.

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 recorded 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 62 km (0.56 degrees).

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

Event Map

Global mecator event map

Event Parameters

Latitude Longitude Origin time (UTC) Origin time (PDT) Depth (km) ml Author
32.4210 -118.1723 10/16/05 (289) 21:11.34 10/16/05 (289) 2:11 PM 6 4.9 cit_10147909

* 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 14:11 (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.

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.

3-D interactive models

Magnitude 4.9 Model Screendump

Screen shot of the virtual 3-D model

You may download an interactive 3-D model by right-clicking (Windows) or CTRL-clicking (Mac) the links below and choosing “Download file to disk”. The file has been compressed to 9.9MB with gzip and must be expanded before use. Alternatively you can download the uncompressed scene file (18MB). To view the virtual model, you need to download iView 3D - a free viewer available from IVS for Windows, Mac, Linux, Sun and SGI platforms. Click here to download the viewer.

The model consists of an outline of the state of California (white lines), fault systems (brown lines), major highways (purple lines), and high–resolution topography in Southern California. The model and its component parts have been accurately geo-referenced. The ml 4.9 earthquake is plotted as a red diamond, historical seismicity is plotted as yellow points, earthquakes over magnitude 4 are plotted as pink spheres, and telemetry paths for the ANZA network as green lines. Major towns in the region are also plotted.

Once the file has loaded into iView3D, navigation is accomplished by using the mouse. Click the left mouse button and drag left or right to rotate about the vertical axis. Click the left mouse button and drag up or down to rotate about the horizontal axis. Translations and scaling are both accomplished with either the middle or right mouse buttons in a two-step process.

Note to Apple Safari Users

The “Download file to disk” CTRL-click option may download the scene file as a text file (saving the file as a .txt format). If this occurs, or you encounter problems opening the scene file, please try downloading the scene file again, but using a different browser such as Mozilla's Firefox or Camino, or Opera.

Search the Internet

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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 17:50:59 UTC]