Welcome to the CISN

The California Integrated Seismic Network (CISN) is a partnership among federal, state, and university agencies involved in California earthquake monitoring. The CISN is dedicated to serve the emergency response, engineering, and scientific communities. The CISN is a region of the Advanced National Seismic System.

08/26/2012: Update on the August 2012 Earthquake Swarm in the Brawley Seismic Zone

03/05/2012: Mw 4.0, El Cerrito, CA

10/21/2010: The Great California ShakeOut

07/7/2010: Mw 5.4 Collins Valley Earthquake

06/15/2010: Mw 5.7 Aftershock to the Mw 7.2 El Mayor-Ccapah Earthquake

04/05/2010: Mw 7.2 Sierra El Mayor Earthquake (Northern Baja California)
For more information on current aftershock activity, consult the Southern California Seismic Network web page.

03/16/2010: ML 4.4 near Pico Rivera, Los Angeles Basin

01/10/2010: Mw 6.5 Gorda Plate Earthquake

12/30/2009: Mw 5.8 Baja California Earthquake

10/06/2009: Update on Olanchan Earthquake Swarm, Olancha, CA

03/24/2009: Mw 4.8, part of Bombay Beach, CA swarm

Part of the Advanced National Seismic System