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Waveform Relocated Earthquake Catalog for Southern California (1981 to June 2011)

Hauksson, Egill and Yang, Wenzheng and Shearer, Peter M. (2012) Waveform Relocated Earthquake Catalog for Southern California (1981 to June 2011). Bulletin of the Seismological Society of America, 102 (5). pp. 2239-2244. ISSN 0037-1106. doi:10.1785/0120120010.

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We determine a new relocated catalog, HYS_catalog_2011, for southern California from 1981 through June 2011. About 75.3% of the hypocenters are calculated with absolute and differential travel‐time picks, and 24.7% could be relocated only by using absolute travel‐time picks with 3D or 1D velocity models. The total catalog consists of more than 502,000 earthquakes in the region extending from Baja California in the south to Coalinga and Owens Valley in the north. The catalog consists of three M 7.1, M 7.2, and M 7.3 mainshocks; their foreshocks and aftershocks; and background seismicity caused by tectonic and other processes in the southern California crust. Hypocenters in the new relocated catalog exhibit tighter spatial clustering of seismicity than does the routinely generated catalog, and the depth distribution is tighter and reflects the thickness of the seismogenic zone more accurately. Compared to the standard catalog, the relocated hypocenters are more easily related to other data sets, such as mapped late Quaternary faults.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Hauksson, Egill0000-0002-6834-5051
Shearer, Peter M.0000-0002-2992-7630
Additional Information:© 2012 by the Seismological Society of America. Manuscript received 25 November 2011. This research was supported by the U.S. Geological Survey Grants G11AP20032 and G12AP20010 and by the Southern California Earthquake Center (SCEC), which is funded by NSF Cooperative Agreement EAR-0106924 and USGS Cooperative Agreement 02HQAG0008. The SCEC contribution number is 1528. The publication number of the Seismological Laboratory, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena is 10069. We are grateful to the operators and analysts who maintain the USGS/Caltech Southern California Seismic Network and who pick and archive the seismograms. Some of the computer codes used in this project were originally written and/or modified by G. Lin. We thank L. Jones and M. Boese for comments on the manuscript.
Group:Seismological Laboratory
Funding AgencyGrant Number
Southern California Earthquake Center (SCEC)UNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Southern California Earthquake Center (SCEC)1528
Caltech Seismological Laboratory10069
Issue or Number:5
Record Number:CaltechAUTHORS:20121101-103757802
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35234
Deposited By: Tony Diaz
Deposited On:01 Nov 2012 23:02
Last Modified:09 Nov 2021 23:13

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