Spatial seismicity rates and maximum magnitudes for background earthquakes
Open-File Report
2007-1437-J
Prepared in cooperation with the California Geological Survey and the Southern California Earthquake Center
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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.
Suggested Citation
Petersen, M.D., Mueller, C.S., Frankel, A.D., Zeng, Y., 2008, Spatial seismicity rates and maximum magnitudes for background earthquakes (Version 1.0): U.S. Geological Survey Open-File Report 2007-1437, iii, 8 p., https://doi.org/10.3133/ofr20071437J.
ISSN: 2331-1258 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Spatial seismicity rates and maximum magnitudes for background earthquakes |
| Series title | Open-File Report |
| Series number | 2007-1437 |
| Chapter | J |
| DOI | 10.3133/ofr20071437J |
| Edition | Version 1.0 |
| Year Published | 2008 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center |
| Description | iii, 8 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Appendix J in The Uniform California Earthquake Rupture Forecast, Version 2 (UCERF 2) |