NEHRP Clearinghouse
- Title
- Velocity and Density Models Incorporating the Cascadia Subduction Zone for 3D Earthquake Ground Motion Simulations. Version 1.3.
- File
- PB2008108682.pdf
- Author(s)
- Stephenson, W. J.
- Source
- January 2007, 28 p.
- Identifying Number(s)
- USGS/OFR-2007-1348
- Abstract
- In support of earthquake hazards and ground motion studies in the Pacific Northwest, three-dimensional P- and S-wave velocity (3D Vp and Vs) and density (3D rho) models incorporating the Cascadia subduction zone have been developed for the region encompassed from about 40.2DGN to 50DGN latitude, and from about -122DGW to -129DGW longitude. The model volume includes elevations from 0 km to 60 km (elevation is opposite of depth in model coordinates). Stephenson and Frankel (2003) presented preliminary ground motion simulations valid up to 0.1 Hz using an earlier version of these models. The version of the model volume described here includes more structural and geophysical detail, particularly in the Puget Lowland as required for scenario earthquake simulations in the development of the Seattle Urban Hazards Maps.
- Keywords
- ; Ground motion studies; Wave velocity model; Pacific Northwest; Earthquake hazards; Density model; Puget lowland; Seattle Urban Hazards Maps