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Person

Scott Haefner

Geologist
Earthquake Science Center

Email: shaefner@usgs.gov
Office Phone: 650-329-4854
Fax: 650-329-5658
ORCID: 0000-0002-0564-4329

Location

Supervisor: Shane T Detweiler
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VS30, the time-averaged shear-wave velocity (VS) to a depth of 30 meters, is a key index adopted by the earthquake engineering community to account for seismic site conditions. VS30 is typically based on geophysical measurements of VS derived from invasive and noninvasive techniques at sites of interest. Owing to cost considerations, as well as logistical and environmental concerns, VS30 data are sparse or not readily available for most areas. Where data are available, VS30 values are often assembled in assorted formats that are accessible from disparate and (or) impermanent Websites. To help remedy this situation, we compiled VS30 measurements obtained by studies funded by the U.S. Geological Survey (USGS) and...
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