References - SCECcode/ucvm GitHub Wiki
DEM and GTL Data Sources
A state-wide California standard topography map is distribued with UCVM. This is a statewide topography map, that also includes statewide Vs30 values, combined into an etree structure.
| Toopgrahy and Vs30 Map Name | Description | UCVM Abbreviation |
|---|---|---|
| USGS NED DEM and Thompson Vs30, 2018 | California elevation and Vs30 data in etree format | ucvm |
| USGS NED DEM and Allen-Wald Vs30, 2007 | Utah elevation and Vs30 data in etree format | ucvm_utah |
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Thompson California Vs30 Model: Thompson, E.M. (2018), An Updated Vs30 Map for California with Geologic and Topographic Constraints (ver. 2.0, July 2022): U.S. Geological Survey data release, doi:10.5066/F7JQ108S.
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For regions outside of California, UCVM uses the Allen, Wald topography to Vs30 relationship: Allen, T.I., and Wald, D.J., 2007, Topographic slope as a proxy for global seismic site conditions (VS30) and amplification around the globe: U.S. Geological Survey Open-File Report 2007-1357, 69 p.