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.
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, 1179-1294. 2012.
Hauksson E., W. Yang and P. M. Shearer, Waveform relocated earthquake catalog for southern California (1981 - 2011), Bull. Seism. Soc. Am., Vol. 103-104, In Press, 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