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

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

Abstract
We determine a new relocated catalog, HYS_catalog_2011, for southernCalifornia from 1981 through June 2011. About 75.3% of the hypocentersare calculated with absolute and differential travel-time picks, and 24.7% couldbe relocated only by using absolute travel-time picks with 3D or 1D velocitymodels. The total catalog consists of more than 502,000 earthquakes in the regionextending from Baja California in the south to Coalinga and Owens Valley in thenorth. The catalog consists of three M 7.1, M 7.2, and M 7.3 mainshocks; theirforeshocks and aftershocks; and background seismicity caused by tectonic and otherprocesses in the southern California crust. Hypocenters in the new relocated catalogexhibit tighter spatial clustering of seismicity than does the routinely generated catalog,and the depth distribution is tighter and reflects the thickness of the seismogenic zonemore accurately. Compared to the standard catalog, the relocated hypocenters are moreeasily related to other data sets, such as mapped late Quaternary faults.

Authors 
E. Hauksson, W. Yang and P. M. Shearer








Published Journal 
Bulletin of the Seismological Society of America, 2012





DOI 
10.1785/0120120010

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

Citation

E. Hauksson,W. Yang,P. M. Shearer. 2012. Waveform Relocated Earthquake Catalog for Southern California (1981 to June 2011). Bulletin of the Seismological Society of America. 102(5):2239-2244.


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