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 2011-2018 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

2017 Focal Mechanism Catalog

2018 Focal Mechanism Catalog