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U.S. Geological Survey coastal plain amplification virtual workshop

July 6, 2022

In early October of 2020, the U.S. Geological Survey (USGS) held a virtual workshop to discuss Gulf and Atlantic Coastal Plains site-response models. Earthquake researchers came together to assess (1) research related to proposed Coastal Plains amplification models and (2) USGS plans for implementing these models. Presentations spanned a broad range of topics from Atlantic and Gulf Coastal Plains geophysical properties including seismic velocity and attenuation, to ground motion amplification models and their impacts on seismic hazard. Interspersed with these presentations were discussions regarding the definition and extent of the Atlantic and Gulf Coastal Plains, potential complexities of wave propagation in the Atlantic and Gulf Coastal Plains, and problems that need to be overcome to implement various proposed site-response models. Based on feedback from this workshop, the USGS working group on Coastal Plain Amplification is considering applying published models that depend on sediment thickness. The working group is also exploring potential application of models that depend on the length of path traversed across the Coastal Plain, including the Gulf Coastal Plain ground-motion model adjustments from the Next Generation Attenuation Relationships for the Eastern United States.

Publication Year 2022
Title U.S. Geological Survey coastal plain amplification virtual workshop
DOI 10.3133/ofr20221006
Authors Oliver S. Boyd, Thomas L. Pratt, Martin C. Chapman, Allison Shumway, Sanaz Rezaeian, Morgan P. Moschetti, Mark D. Petersen
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 2022-1006
Index ID ofr20221006
Record Source USGS Publications Warehouse
USGS Organization Geologic Hazards Science Center