CGS Map Sheet 48: Shear-wave Velocity in Upper 30m of Surficial Geology (Vs30)

Published by California Department of Conservation | State of California | Metadata Last Checked: July 09, 2025 | Last Modified: 2016-09-30T00:00:00.000Z

<div style='text-align:justify;'>This dataset represents simplified geologic units that have been correlated to the time-averaged seismic shear-wave velocity in the upper 30 meters of the earth’s surface (Vs30). The geologic units were compiled from published maps that range in scale from 1:250,000 to 1:24,000, along with a system for subdividing younger alluvium based on surface slope. More information can be obtained from the associated article published in the Bulletin of the Seismological Society of America: Wills, C.J., Gutierrez, C.I., Perez, F.G., and Branum, D.B., 2015, A next-generation Vs30 map for California based on geology and topography: Bulletin of the Seismological Society of America.</div>

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Complete Metadata

identifier	0fadb05a-a7cb-4316-8bd1-84537983199a
issued	2017-05-24T22:50:17.000Z
theme	[ "Natural Resources" ]