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Location Folder Show Tree ROOT _ScienceBase Catalog __USGS Data Release Products 09471143 - Walnut Gulch below ARS Flume 6, near Tombstone, AZ - 07/28/2017 Flow Event Data 12-digit hydrologic unit outlet (pour) points for the NHDPlus V2.1 WBD snapshot 1992 digital surface model and orthomosaic of Malakoff Diggins State Historic Park, California 2010-2017 zooplankton data from whole water-column tows in Lakes Michigan and Huron 2013 East Bay Seismic Experiment (EBSE) -- Implosion Data, Hayward, Calif More... Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Raster (2) Types Downloadable (2) GeoTIFF (2) OGC WMS Layer (2) Contacts Stephen B DeLong Earthquake Science Center U.S. Geological Survey - ScienceBase Natural Hazards U.S. Geological Survey Stephen B Delong Alexandra J Pickering Categories Data (2) Data Release - Revised (1) Tag Types Theme (2) Place (2) Harvest Set (2) USGS Scientific Topic Keyword (1) Tag Schemes USGS Thesaurus (2) GNIS (1) None (1) View Results as: JSON ATOM CSV Browse Folder

An Updated Vs30 Map for California with Geologic and Topographic Constraints (ver. 2.0, July 2022) This data release provides a map of the time-averaged shear-wave velocity in the upper 30 m (Vs30) for California using the method described by Thompson and others (2014). There are two adjustments to the algorithm described by Thompson and others (2014), which is built on the geology-based Vs30 map by Wills and Clahan (2006). In this data release, we use the Wills and others (2015) updated geology-based Vs30 map. The second change is that we have adjusted the kriging procedure so that measured Vs30 values do not affect the predictions across distinctly different geologic units. July 2022 Update (ver. 2.0) Resolution is now 3 arcseconds instead of 7.5 arcseconds Fixed a code error that prevented some of the Vs30... Categories: Data, Data Release - Revised; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: California, Earthquake Hazards Program, GHSC, Geologic Hazards Science Center, USGS, All tags... USGS Science Data Catalog (SDC), United States, earth science, earthquake hazard, geophysics, seismic hazard, seismology, tectonic, Fewer tags Lidar point cloud, GNSS, and DEM raster data from the Ehlers Lane fault-study site near St. Helena, California, March 31 and August 1, 2017 Text files: These data are text files of GNSS survey points collected along a trace of the West Napa Fault Zone near Ehlers Lane north of St. Helena, California. Data were collected to aid in paleoseismic investigation of the suspected fault strand and to characterize local geomorphology. Data were collected on March 31, and August 1, 2017 using a Leica Viva GS15 survey-grade GNSS receiver. The data are delivered as positions in the NAD83 UTM zone 10N coordinate system with orthometric heights according to Geoid 12B. LAZ files: These data are point clouds from terrestrial lidar data collected along a trace of the West Napa Fault Zone near Ehlers Lane north of St. Helena, California. Data were collected to aid in... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Raster; Tags: Geomorphology, Napa County, Napa Valley, Remote Sensing, Saint Helena, All tags... USGS Science Data Catalog (SDC), faults, lidar, paleoseismology, Fewer tags