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USGS: Cascadia Subduction Zone Seismic Velocity Model Gains Shallow Soil, Topography Update
September 25, 2025
WASHINGTON, Sept. 25 (TNSLrpt) -- The U.S. Department of the Interior, U.S. Geological Survey has issued Open-File Report 2025-1045, titled 'Three-Dimensional Seismic Velocity Model for the Cascadia Subduction Zone with Shallow Soils and Topography, Version 1.7', authored by Erin A. Wirth, Alex R. Grant, Ian P. Stone, William J. Stephenson, and Arthur D. Frankel. This document describes a critically needed update to the existing three-dimensional (3D) seismic velocity model for the Cas . . .

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