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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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The dataset is consisted of travel-time records (vs30data.SCE.FINAL01_DATA.zip) in SEG2 format recorded using multi-station arrays near 6 seismographic stations located in southern California. A table in the spreadsheet (vs30data.SCE.FINAL01.xlsx) summarizes the data collection. Included in the dataset are figures showing incremental results supporting the resultant modeled shear-wave velocity (Vs) profile and estimated time-averaged Vs in the upper 30 m of the subsurface (Vs30). Incremental results include plots of the picks of fundamental mode dispersion curve, the modeled Vs profile and estimated Vs30, and the empirical and theoretical dispersion curves.


    map background search result map search result map Data Release of Vs30 Estimates Using Multiple Methods at 6 SCSN Stations Updated Compilation of VS30 Data for the United States Data Release of Vs30 Estimates Using Multiple Methods at 6 SCSN Stations Updated Compilation of VS30 Data for the United States