Spatial Seismicity Rates and Maximum Magnitudes for Background Earthquakes

Petersen, Mark D.; Mueller, Charles S.; Frankel, Arthur D.; Zeng, Yuehua

Abstract:

The background seismicity model is included to account for M 5.0 - 6.5 earthquakes on faults and for random M 5.0 ? 7.0 earthquakes that do not occur on faults included in the model (as in earlier models of Frankel et al., 1996, 2002 and Petersen et al., 1996). We include four different classes of earthquake sources in the California background seismicity model: (1) gridded (smoothed) seismicity, (2) regional background zones, (3) special fault zone models, and (4) shear zones (also referred to as C zones). The gridded (smoothed) seismicity model, the regional background zone model, and the special fault zones use a declustered earthquake catalog for calculation of earthquake rates. Earthquake rates in shear zones are estimated from the geodetically determined rate of deformation across an area of high strain rate. We use a truncated exponential (Gutenberg-Richter, 1944) magnitude-frequency distribution to account for earthquakes in the background models.

Genre:

USGS Numbered Series

ProdID:

81122

Citation Author:

Petersen, Mark D.; Mueller, Charles S.; Frankel, Arthur D.; Zeng, Yuehua

Citation Contributing Office:

USGS Earthquake Hazards Program

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Version 1.0

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ENGLISH

Citation Larger Work Title:

Appendix J in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2)

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Citation Phsyical Description:

iii, 8 p.

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Citation Public Comments:

Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center

Citation Publisher:

Geological Survey (U.S.)

Citation Series:

Open-File Report

Citation Series Code:

OFR

Citation Series Number:

2007-1437-J

Citation Search Results Text:

Spatial Seismicity Rates and Maximum Magnitudes for Background Earthquakes; 2008; OFR; 2007-1437-J; Appendix J in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2); Petersen, Mark D.; Mueller, Charles S.; Frankel, Arthur D.; Zeng, Yuehua