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 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.
If you are going to use this catalog in your researches (e.g. publications, reports, etc), please cite the related two papers in the following REFERENCE section.
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. Seism. Soc. Am., Vol. 102, 1179-1194. 2012.
Hauksson E., W. Yang and P. M. Shearer, Waveform relocated earthquake catalog for southern California (1981 - 2011), Bull. Seism. Soc. Am., Vol. 102, 2239-2244, 2012.
Right click or option-click YHS_2010.hash and choose "Save As.../Download Linked File As..."to download the catalog (~20Mb).
1981 1 1 4 13 55.710 3301565 33.25517 -115.96750 5.680 2.260 318 57 -168 37 39 18 0.17 0 0.00 C
|37||Fault Plane Uncertainty|
|39||Auxiliary Fault Plane Uncertainty|
|18||Number of P wave First Motions|
|0.17||Misfit of First Motions|
|0||Number of S/P amplitude ratios|
|0.00||average log10(S/P amplitude ratio) misfit|
|C||Quality of focal mechanism|
Thanks to Men-Andrin Meier for pointing out.
Last Update: April 4, 2012