Seismic hazard in the Intermountain West
The 2014 national seismic-hazard model for the conterminous United States incorporates new scientific results and important model adjustments. The current model includes updates to the historical catalog, which is spatially smoothed using both fixed-length and adaptive-length smoothing kernels. Fault-source characterization improved by adding faults, revising rates of activity, and incorporating new results from combined inversions of geologic and geodetic data. The update also includes a new suite of published ground motion models. Changes in probabilistic ground motion are generally less than 10% in most of the Intermountain West compared to the prior assessment, and ground-motion hazard in four Intermountain West cities illustrates the range and magnitude of change in the region. Seismic hazard at reference sites in Boise and Reno increased as much as 10%, whereas hazard in Salt Lake City decreased 5–6%. The largest change was in Las Vegas, where hazard increased 32–35%.
Citation Information
Publication Year | 2015 |
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Title | Seismic hazard in the Intermountain West |
DOI | 10.1193/103114EQS173M |
Authors | Kathleen Haller, Morgan P. Moschetti, Charles Mueller, Sanaz Rezaeian, Mark D. Petersen, Yuehua Zeng |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Earthquake Spectra |
Index ID | 70176704 |
Record Source | USGS Publications Warehouse |
USGS Organization | Geologic Hazards Science Center |