Recent earthquake near Hector Mine / Joshua Tree

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

Early Saturday morning, October 16th, 1999 at approximately 2:46 PST we recorded an earthquake located in a sparsely populated area 55 km (34 miles) northwest of Twentynine Palms and 76 km (47 miles) east-southeast of Barstow. This earthquake was felt in the San Diego area. Preliminary source parameters are shown below.

Pre-shocks Main Event and Aftershocks

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Latitude Longitude Origin time Depth Mw Author Waveforms
34.412 -116.338 10/16/1999 (289) 09:46:47.103 0.000   UCSD available
34.600 -116.270 10/16/1999 (289) 09:46:44.000 6.000 7.00 SCEC available
34.640 -116.440 10/16/1999 (289) 09:59:34.000 10.0 5.3 QED available
34.440 -116.250 10/16/1999 (289) 12:57:21.000 1.0 5.8 QED available
34.860 -116.35 10/21/1999 (294) 01:54:06.000 4.5 5.1 SCEC available
34.800 -116.41 10/21/1999 (294) 01:54:35.000 1.7 5.0 SCEC available
34.860 -116.40 10/21/1999 (294) 01:57:38.000 1.4 5.0 SCEC available
34.85 -116.42 10/22/1999 (295) 16:08:48.000 6.0 5.1 SCEC  
34.520 -116.27 10/29/1999 (302) 12:36:37.000 0.1 4.5 SCEC  

The event parameters for the main shock are shown in red in the above table. The event parameters for significant aftershocks are shown in orange.

The Anza group at the University of California San Diego currently operates three broadband seismic networks.

Learn more about the Anza group (including who works here, other networks, nuclear tests in China/India/Pakistan).

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URL: http://eqinfo.ucsd.edu/special_events/1999/290/a/index.php [Last updated: 2015-10-22 22:34:38 UTC]