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.

REFERENCE:

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.

DOWNLOAD:

Right click or option-click YHS_2010.hash and choose "Save As.../Download Linked File As..."to download the catalog (~20Mb).

DATA FORMAT:

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

1981 Year
1 Month
1 Day
4 Hour
13 Minute
55.710 Second
3301565 CID
33.25517 Latitude (Degree)
-115.96750 Longitude (Degree)
5.680 Depth (km)
2.260 Magnitude
318 Strike
57 Dip
-168 Rake
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

UPDATES:

  • Removed entry (CID=3140671), which is a duplicated record for the Northridge mainshock (CID=3144585), but of the teleseismic event type (April 4, 2012)

    Thanks to Men-Andrin Meier for pointing out.

    Last Update: April 4, 2012