Poster #041, Ground Motions
Low-Frequency Examination of Synthetic Reno-Area Basin Amplification from M3 Earthquakes at a Variety of Azimuths
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Poster Presentation
2021 SCEC Annual Meeting, Poster #041, SCEC Contribution #11472 VIEW PDF
on personal laptops for about 16 hours to complete each scenario. We are using Eckert’s 3D community velocity model for the basin, on which he based the M6.3 Reno ShakeOut Scenario computation to 3.125 Hz. At a grid spacing of 120 m, this velocity model has a minimum shear-wave velocity of 609 m/s, yielding at least 4.57 grid points per minimum wavelength. PGV maps produced from these models will allow us to compare shaking at basin versus bedrock sites, and how it changes based on the location of the earthquake. Preliminary indications are that the standard deviation of basin-over-bedrock ground-motion ratios will be a substantial proportion of the average ratio. These results will help in determining the basin’s amplification effects when assessing seismic hazard in the Reno area, and other urban basins.
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