Seismic hazard in the eastern United States
The U.S. Geological Survey seismic hazard maps for the central and eastern United States were updated in 2014. We analyze results and changes for the eastern part of the region. Ratio maps are presented, along with tables of ground motions and deaggregations for selected cities. The Charleston fault model was revised, and a new fault source for Charlevoix was added. Background seismicity sources utilized an updated catalog, revised completeness and recurrence models, and a new adaptive smoothing procedure. Maximum-magnitude models and ground motion models were also updated. Broad, regional hazard reductions of 5%–20% are mostly attributed to new ground motion models with stronger near-source attenuation. The revised Charleston fault geometry redistributes local hazard, and the new Charlevoix source increases hazard in northern New England. Strong increases in mid- to high-frequency hazard at some locations—for example, southern New Hampshire, central Virginia, and eastern Tennessee—are attributed to updated catalogs and/or smoothing.
Citation Information
| Publication Year | 2015 |
|---|---|
| Title | Seismic hazard in the eastern United States |
| DOI | 10.1193/110414EQS182M |
| Authors | Charles Mueller, Oliver S. Boyd, Mark D. Petersen, Morgan P. Moschetti, Sanaz Rezaeian, Allison Shumway |
| Publication Type | Article |
| Publication Subtype | Journal Article |
| Series Title | Earthquake Spectra |
| Index ID | 70157409 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | Geologic Hazards Science Center |
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Allison M Shumway
Research Geophysicist
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Allison M Shumway
Research GeophysicistEmail