2018 Update of the U.S. National Seismic Hazard Model
Date: 4/24/2019
Time: 08:30 AM
Room: Pike
During 2017-2018, the National Seismic Hazard Model was updated by incorporating (1) new median ground motion models, new estimates of their epistemic uncertainties and aleatory variabilities, and new soil amplification factors for the central and eastern U.S., (2) amplification of long-period ground motions in deep sedimentary basins in the Los Angeles, San Francisco, Seattle, and Salt Lake City areas, (3) an updated seismicity catalog, which includes new earthquakes that occurred between 2012 and 2017, and (4) improved computer code and implementation details. Results show significantly increased ground shaking in many (but not all) locations across the central and eastern U.S., including the four urban areas (listed above) that overlie deep sedimentary basins in the western U.S. These maps are being considered by the Building Seismic Safety Council for inclusion in upcoming building codes. Due to population growth, more people live and work in areas of high or moderate seismic hazard than ever before, leading to higher risk of undesirable consequences from future ground shaking.
Presenting Author: Peter Powers
Authors
Mark D Petersen mpetersen@usgs.gov U.S. Geological Survey, Denver, Colorado, United States Corresponding Author
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Allison M Shumway ashumway@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Peter Powers pmpowers@usgs.gov U.S. Geological Survey, Golden, Colorado, United States Presenting Author
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Charles S Mueller cmueller@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Morgan P Moschetti mmoschetti@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Arthur Frankel afrankel@usgs.gov U.S. Geological Survey, Seattle, Washington, United States |
Sanaz Rezaeian srezaeian@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Daniel E McNamara mcnamara@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Susan M Hoover shoover@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Nico Luco nluco@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Oliver S Boyd olboyd@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Kenneth Rukstales rukstales@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Kishor Jaiswal kjaiswal@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Eric M Thompson emthompson@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Brandon Clayton bclayton@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
Edward H Field field@usgs.gov U.S. Geological Survey, Golden, , United States |
Yuehua Zeng zeng@usgs.gov U.S. Geological Survey, Golden, Colorado, United States |
2018 Update of the U.S. National Seismic Hazard Model
Category
U.S. Geological Survey National Seismic Hazard Model Components