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Enhanced Shake Zoning Simulations of Earthquake Scenarios in Downtown Reno, Nevada

This research project by Janice Kukuk, under the supervision of Dr. John Louie, presents advanced simulations of two earthquake scenarios affecting downtown Reno, Nevada. Utilizing models from Widmer et al. (2007) and Saltus & Jachens (1995), the project analyzes basin thickness and geotechnical data to predict ground shaking. The scenarios are modeled after the 2008 Wells earthquake, with a strike-slip fault measuring 7.58 km in length and a moment magnitude (Mw) of 5.94. Results indicate significant ground velocities of 22 cm/s and 46 cm/s, with potential for severe damage due to urban conditions.

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Enhanced Shake Zoning Simulations of Earthquake Scenarios in Downtown Reno, Nevada

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  1. Next-Level ShakeZoning simulations of two earthquake scenarios in downtown Reno, Nevada Janice Kukuk Fall 2010 UNR Senior Research Project Advisor: Dr. John Louie

  2. Fault

  3. Model Setup • Two Basin-Thickness Datasets: • Widmer et al., 2007 Washoe Co. gravity model • Saltus and Jachens 1995 gravity model • Two Geotech Datasets: • Pancha 2007 ANSS station measurements • Scott et al., 2004 shallow shear-velocity transect • Scenario Fault (like 2008 Wells): • Strike: N-S • Motion: Normal- down to the west • Length: 7.58 km • Mw: 5.94 (Anderson et al., 1996) • Frequency: 0.1 Hz and 1.0 Hz

  4. Physics-Based Wave Propagation 0.1 Hz Model 1.0 Hz Model • The basin amplifies and traps seismic shaking • Wave propagation unaffected by basin dataset boundariesin the 0.1 Hz Model • Wave propagation is affected by basin dataset boundaries in the 1.0 Hz Model

  5. Peak Ground Velocities (PGV) Max PGV: 22 cm/s Max PGV: 46 cm/s

  6. Conclusions • Similar results to the Mw 6.0 2008 Wells earthquake • Both 0.1 Hz and 1.0 Hz simulations show large PGVs • 22 cm/s and 46 cm/s • Expected shaking similar to that of the Wells earthquake • Possibly more damage due to larger population and large number of unreinforced masonry structures • More constraint needed on the length and the slip rate of the scenario fault

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