Seismic Velocity Structure of the Greater Mount Rainier Area
1434-95-G-2571
Stephen D. Malone, P.I.
Dept. of Earth and Space Sciences, University of Washington
Seattle, WA 98195
Phone:(206) 543-8020 FAX:(206)543-0489
e-mail: steve@ess.washington.edu
Program Element: II.1 and II.2
Keywords: Seismotectonics, regional seismic hazards, regional modeling
Non-Technical Summary
This project is a study of the detailed three-dimensional velocity structure of southwestern Washington (Figure 1). Data from the Pacific Northwest Seismograph Network (1434-95-A-1302) were used, along with data from 18 temporary seismometers deployed to improve coverage for this study. Preliminary results suggest that the Western Rainier Seismic Zone (WRSZ) may consist of several short fault segments, rather than a single long fault. If so, the maximum earthquake size on the the WRSZ would be less than magnitude 4.5. This study is nearing completion, and results will be published shortly in Seth Moran's Ph.D. dissertation