Southern California Earthquake Data Center

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2011 - Yang, Hauksson, and Shearer: Refined earthquake focal mechanism catalog for southern California (1981-2010)


A refined earthquake focal mechanism catalog for southern Califiornia using the HASH method and locations derived from waveform cross-correlation. Each focal mechanism is obtained from grid searching for the best-fitting double-couple focal mechanism solution to both the P-wave first motion polarity records that were picked by network analysts, and the S/P amplitude ratios computed from three-component seismograms. This dataset includes around 179,000 focal mechanisms for earthquakes occurring 1981 through 2010 in southern California region. Updated datasets for 2011-2016 have been added below.




Yang, W., E. Hauksson and P. M. Shearer, Computing a large refined catalog of focal mechanisms for southern California (1981 - 2010): Temporal Stability of the Style of Faulting, Bull. Seismol. Soc. Am., June 2012, v. 102, p. 1179-1194, doi:10.1785/0120110311, 2012.


Hauksson E., W. Yang and P.M. Shearer, Waveform relocated earthquake catalog for southern California (1981 - 2011), Bull. Seismol. Soc. Am., Vol. 102, No. 5, October 2012, doi:10.1785/0120120010, 2012.



1981-2010 Focal Mechanism Catalog

1981-2010 Focal Mechanism Catalog Format Description

2011-2013 Focal Mechanism Catalog

2011 Focal Mechanism Catalog

2012 Focal Mechanism Catalog

2013 Focal Mechanism Catalog

2014 Focal Mechanism Catalog

2015 Focal Mechanism Catalog

2016 Focal Mechanism Catalog (Jan 1 - Sept 30)