Exciting news! We're transitioning to the Statewide California Earthquake Center. Our new website is under construction, but we'll continue using this website for SCEC business in the meantime. We're also archiving the Southern Center site to preserve its rich history. A new and improved platform is coming soon!

Waveform Relocated Earthquake Catalog for Southern California (1981 to June 2011)

Egill Hauksson, Wenzheng Yang, & Peter M. Shearer

Published October 2012, SCEC Contribution #1528

We have relocated the southern California seismicity recorded by the Southern California Seismic Network (SCSN) from 1981 to June 2011. First, we applied a 3D velocity model from Hauksson (2000) to improve the SCSN catalog locations using the method of Thurber (1993). Second, we have applied a similar approach as Hauksson and Shearer (2005); Shearer et al. (2005); and Lin et al. (2007) by clustering the events and using the differential travel times to perform relative re-locations within each cluster. The resulting catalog contains more than 502,000 earthquakes including 386,277 events that were relocated using differential travel-times. The magnitude range for the SCSN catalog is from M0.0 to M7.3, with the 1992 Landers earthquake being the largest event (Hutton et al., (2010).

Hauksson, E., Yang, W., & Shearer, P. M. (2012). Waveform Relocated Earthquake Catalog for Southern California (1981 to June 2011). Bulletin of the Seismological Society of America, 102, 2239-2244. doi: 10.1785/0120120010.