U.S. Department of the Interior U.S. Geological Survey Preliminary Analysis of High- Resolution...

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

Transcript of U.S. Department of the Interior U.S. Geological Survey Preliminary Analysis of High- Resolution...

U.S. Department of the InteriorU.S. Geological Survey

Preliminary Analysis of High-Resolution P-Wave Seismic Imaging Profiles Acquired Through Reno, Nevada, for

Earthquake Hazards AssessmentFrary, 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 NevadaNevada Seismological LaboratoryReno, Nevadahttp://seismo.unr.edu

Geologic Hazards Science CenterU.S. Geological SurveyGolden, Coloradohttp://earthquake.usgs.gov

Network for Earthquake Engineering SimulationUniversity of TexasAustin, Texashttp://nees.utexas.edu

Goals

Western Basin and Range Community Velocity Model

Reno-Carson City Urban Hazards Maps Characterize Truckee Meadows Basin structure

and fault locations

Line LocationsTRK lines ~6.72 km

map from GoogleEarth

MNZA line ~3.84 km

Comparison to Gravity Map

M. Widmer, 2007

Acquisition Parameters

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

spacing

Truckee River Shot RecordTi

me

(us)

Station 175

Truckee River Processing

AGC (400 ms) Bandpass filter (20-140 Hz) Velocity analysis and

residual statics Post-stack finite difference

time migration FX deconvolution

Truckee River Time-Migrated Section

Tie-in point between two profiles

Preliminary

Truckee River Depth Migration

Tie-in point between two profiles

Preliminary

Manzanita Shot RecordTi

me

(us)

Station 461

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

Manzanita Time-Migrated Section

Preliminary

Manzanita Depth Migration

Preliminary

Further Investigation

Additional transects Continued collaboration

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