Southern California Earthquake Data Center



Starting Jan 1, 2010, SCEDC archives high sample strong motion channels continuously.


Data sets for M7.2 Sierra El Mayor Cucapah Earthquake


GPS displacement waveforms from California Real Time Network for M7.2 Sierra El Mayor Cucapah Earthquake



American Recovery and Reinvestment Act (ARRA) improves the data quality of the SCEDC archive.


As of September 9, 2011, the SCEDC website has been upgraded to a new design.


New waveform relocated earthquake catalog available.


New focal mechanism catalog available.



Version 1.6.2 of the STP command-line client is available as of March 6, 2012. This version corrects a bug that caused a segmentation fault on 64-bit machines when the main STP server was overloaded.


GPS data, waveform scans, and STP will be offline for about 10 minutes starting at 3pm today. (April 4, 2012)


SCEDC is now archiving real time GPS displacement waveforms. (July 2, 2012)


We apologize for the SCEDC website outage. We are working on getting the site back online. Please let us know if you notice anything that is not working. (07/17/2012)


Join the California earthquake drill ShakeOut on Oct 18, 2012 10:18am. (10/18/2012)


Strong motion waveforms from California Geological Survey now available in the archive. 12/06/12


The SCEDC now has a new version of web STP in beta testing.
Web STP allows user to retrieve continuous or triggered waveform data, as well as download phase data in STP format for events in the SCEDC earthquake catalog. Users can either use the form or call the service programmatically via curl or wget.


Join the California earthquake drill ShakeOut on Oct 17, 2013 10:17am. (10/14/2013)



New waveform relocated earthquake catalog available.(09/05/2014)


New focal mechanism catalog available.(09/05/2014)


Join the California earthquake drill ShakeOut on Oct 16, 2014 10:16am. (09/05/2014)


** Notice - August 22, 2014 ** On July 7, 2014, a bug was introduced into STP that caused continuous data to become leap-second noncompliant. The bugfix has been deployed on this STP server on August 22, 2014. It is recommended that you re-download continuous data downloaded between July 7, 2014, and August 22, 2014.



On January 12, 2015, the SCEDC website will be moving to a new address, Our web services, PHP, and catalog search pages will move to the address The old address,, will remain online and direct traffic to the new addresses at least until April 12, 2015.