1. U.S. Department of the Interior U.S. Geological Survey Preliminary Analysis of High- Resolution P-Wave Seismic Imaging Profiles Acquired Through Reno, Nevada, for Earthquake Hazards Assessment Frary, R.N., Stephenson, W.J., Louie, J.N., Odum, J.K., Maharrey, J.Z., Dhar, M.S., Kent, R.L., Hoffpauir, C.G. University of Nevada Nevada Seismological Laboratory Reno, Nevada http://seismo.unr.edu Geologic Hazards Science Center U.S. Geological Survey Golden, Colorado http://earthquake.usgs.gov Network for Earthquake Engineering Simulation University of Texas Austin, Texas http://nees.utexas.edu

2. Goals  Western Basin and Range Community Velocity Model  Reno-Carson City Urban Hazards Maps  Characterize Truckee Meadows Basin structure and fault locations

3. Line Locations TRK lines ~6.72 km map from GoogleEarth MNZA line ~3.84 km

4. Comparison to Gravity Map M. Widmer, 2007

5. Acquisition Parameters  Linear sweep 15-120 Hz  CMP (72-fold) acquisition  2-second records  5-m source and receiver spacing

6. Truckee River Shot Record Time (us) Station 175

7. Truckee River Processing  AGC (400 ms)  Bandpass filter (20-140 Hz)  Velocity analysis and residual statics  Post-stack finite difference time migration  FX deconvolution

8. Truckee River Time-Migrated Section Tie-in point between two profiles Preliminary

9. Truckee River Depth Migration Tie-in point between two profiles Preliminary

10. Manzanita Shot Record Time (us) Station 461

11. Manzanita Processing  AGC (400 ms)  Bandpass filter (20-140 Hz)  Velocity analysis and residual statics  Post-stack finite difference time migration  Eigenvector filter  Adaptive deconvolution

12. Manzanita Time-Migrated Section Preliminary

13. Manzanita Depth Migration Preliminary

14. Further Investigation  Additional transects  Continued collaboration

15. Acknowledgements  University of Nevada, Reno students  nees@UTexas  University of Nevada, Reno Dept. of Geological Sciences and Engineering  Mike Widmer, Washoe County Dept. of Water Resources