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Seismic hazard mapping of California considering site effects

January 1, 2010

In this paper, we have combined the U.S. Geological Survey's National Seismic Hazard Maps model with the California geologic map showing 17 generalized geologic units that can be defined by their VS30. We regrouped these units into seven VS30 values and calculated a probabilistic seismic hazard map for the entire state for each VS30 value. By merging seismic hazard maps based on the seven different V S30 values, a suite of seismic hazard maps was computed for 0.2 and 1.0 s spectral ordinates at 2% probability of exceedance (PE) in 50 years. The improved hazards maps explicitly incorporate the site effects and their spatial variability on ground motion estimates. The spectral acceleration (SA) at 1.0 s map of seismic shaking potential for California has now been published as California Geological Survey Map Sheet 48.

Publication Year 2010
Title Seismic hazard mapping of California considering site effects
DOI 10.1193/1.3478312
Authors E. Kalkan, C.J. Wills, D.M. Branum
Publication Type Article
Publication Subtype Journal Article
Series Title Earthquake Spectra
Index ID 70036156
Record Source USGS Publications Warehouse
USGS Organization Earthquake Science Center