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Chirp data were collected by the U.S. Geological Survey in September of 2013 in Port Valdez, Alaska. Data were collected aboard the USGS R/V Alaskan Gyre during field activity G-01-13-GA, using an EdgeTech SB-512i sub-bottom profiler. Sub-bottom acoustic penetration spans several tens of meters and is variable by location.
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High-resolution multichannel minkisparker seismic-reflection (MCS) profiles were collected by the U.S. Geological Survey in September and October of 2016 from the northern portion of the Santa Barbara Basin offshore southern California. Data were collected aboard the USGS R/V Parke Snavely and NOAA R/V Shearwater during field activity 2016-666-FA using a SIG 2-mille minisparker and recorded using 48- or 24-channel Geometrics digital hydrophone streamer. Sub-bottom acoustic penetration spans several hundreds of meters and is variable by location.
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This data release provides the locations and certain key metrics of landslide features offshore southern California, including landslide perimeters, scarps, evacuation zones, debris aprons, and slide-prone areas in geographic information system (GIS) shapefile format. The offshore region of southern California is a tectonically active area that includes more than 20 fault-bounded basins and ridges that are subject to various types of mass-wasting and landslide processes. The collection of high-resolution seafloor mapping data offshore southern California, mostly within the last 25 years, provide a new data set that forms the basis for the identification and mapping of landslides and slide-related features throughout...
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High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey and the University of Washington in February of 2017 west of Seattle in Puget Sound and in Lake Washington, Washington. Data were collected aboard the University of Washington’s R/V Clifford A. Barnes during USGS field activity 2017-612-FA using an Edgetech SB-512i sub-bottom profiler. Sub-bottom acoustic penetration spans several tens of meters and is variable by location.
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High-resolution multichannel boomer seismic-reflection data were collected by the U.S. Geological Survey and the University of Washington in February of 2017 east of Seattle in Lake Washington, Washington. Data were collected aboard University of Washington’s R/V Clifford A. Barnes during USGS field activity 2017-612-FA using an Applied Acoustics triple plate S-Boom sound source and recorded on a 24 channel Geometrics digital hydrophone streamer. Sub-bottom acoustic penetration spans several hundreds of meters and is variable by location.
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A comprehensive map of Quaternary faults has been generated for offshore of California. The Quaternary fault map includes mapped geometries and attribute information for offshore fault systems located in California State and Federal waters. The polyline shapefile and matching KML file have been compiled from previously published mapping where relatively dense, high-resolution marine geophysical data exist. The data are accompanied by a PDF containing citations for the compiled source data. Most of the marine geophysical data used for mapping have been processed, merged, and released by the USGS in maps, data releases, and journal publications in support of the California Seafloor Mapping Program and the U.S. West...
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High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey, Pacific Coastal and Marine Science Center in May of 2019 in Whiskeytown Lake, California using an Edgetech SB-512i sub-bottom profiler. These data were collected to measure possible debris flows into the lake during the 2018-2019 rainy season following the July-August 2018 Carr fire that burned vegetation around the entire lake. Post-fire hillslope sediment yields are commonly substantially greater than pre-fire yields, but the degree to which they increase can vary substantially. Effects of wildfire on sediment yield have important implications for hazards (debris-flow risk), ecosystem disturbance and recovery, and downstream water...
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High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey in July of 2018 between Point Conception and Coal Oil Point in the Santa Barbara Channel, California. Data were collected aboard the USGS R/V Parke Snavely during field activity 2018-645-FA, using an EdgeTech SB-512i sub-bottom profiler. Sub-bottom acoustic penetration spans several tens of meters and is variable by location.
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High-resolution multichannel minisparker seismic-reflection data were collected by the U.S. Geological Survey and the University of Washington in February of 2017 west of Seattle in Puget Sound and in Lake Washington, Washington. Data were collected aboard University of Washington’s R/V Clifford A. Barnes during USGS field activity 2017-612-FA using a 500 Joule SIG 2-mille minisparker sound source and recorded on a 48 channel Geometrics digital hydrophone streamer. Sub-bottom acoustic penetration spans several hundreds of meters and is variable by location.
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High-resolution multichannel minisparker seismic-reflection data were collected by the U.S. Geological Survey in July of 2018 between Point Conception and Coal Oil Point in the Santa Barbara Channel, California. Data were collected aboard the USGS R/V Parke Snavely during field activity 2018-645-FA, using SIG 2-mille minisparker and recorded using an 8-channel Geometrics digital hydrophone streamer. Sub-bottom acoustic penetration spans several hundreds of meters and is variable by location.
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High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey in April 2011 south of Bainbridge Island and west of Seattle in Puget Sound, Washington. Data were collected aboard the R/V Karluk during field activity K0211PS using an Edgetech SB-512i sub-bottom profiler. Sub-bottom acoustic penetration spans several tens of meters and is variable by location.


map background search result map search result map High-resolution multibeam bathymetry data collected southwest of Montague Island, Alaska during field activity 2014-622-FA High-resolution multibeam bathymetry data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA High-resolution acoustic backscatter data collected southwest of Montague Island, Alaska during field activity 2014-622-FA High-resolution acoustic backscatter data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA Quaternary faults offshore of California Digital maps of submarine landslides and mass wasting features offshore of southern California Chirp seismic-reflection data from USGS field activity G-01-13-GA collected in Port Valdez, Alaska, in September 2013 Multichannel minisparker seismic-reflection data of USGS field activity 2018-645-FA collected in the Santa Barbara Channel in July of 2018 Chirp sub-bottom data of USGS field activity 2018-645-FA collected in the Santa Barbara Channel in July of 2018 Multichannel minisparker seismic-reflection data of USGS field activity 2016-666-FA collected in the Santa Barbara Basin in September and October of 2016 Landslide scarps offshore of Southern California, 2023 Landslides offshore of southern California, 2023 Landslide mass-wasting zones offshore of Southern California, 2023 Landslide debris aprons offshore of southern California, 2023 Chirp sub-bottom data of USGS field activity K0211PS collected in Puget Sound, Washington in April of 2011 Multichannel minisparker data of USGS field activity 2017-612-FA collected in Puget Sound, Washington in February of 2017 Multichannel boomer data of USGS field activity 2017-612-FA collected in Lake Washington, Washington in February of 2017 Chirp sub-bottom data of USGS field activity 2017-612-FA collected in Puget Sound and Lake Washington, Washington in February of 2017 Landslide evacuation zones offshore of Southern California, 2023 Chirp sub-bottom data collected in 2019 in Whiskeytown Lake, California during USGS field activity 2018-686-FA Chirp sub-bottom data collected in 2019 in Whiskeytown Lake, California during USGS field activity 2018-686-FA High-resolution multibeam bathymetry data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA High-resolution acoustic backscatter data collected southwest of Chenega Island, Alaska during field activity 2014-622-FA Chirp sub-bottom data of USGS field activity 2018-645-FA collected in the Santa Barbara Channel in July of 2018 Multichannel minisparker data of USGS field activity 2017-612-FA collected in Puget Sound, Washington in February of 2017 Multichannel minisparker seismic-reflection data of USGS field activity 2018-645-FA collected in the Santa Barbara Channel in July of 2018 High-resolution multibeam bathymetry data collected southwest of Montague Island, Alaska during field activity 2014-622-FA Chirp seismic-reflection data from USGS field activity G-01-13-GA collected in Port Valdez, Alaska, in September 2013 High-resolution acoustic backscatter data collected southwest of Montague Island, Alaska during field activity 2014-622-FA Chirp sub-bottom data of USGS field activity 2017-612-FA collected in Puget Sound and Lake Washington, Washington in February of 2017 Multichannel minisparker seismic-reflection data of USGS field activity 2016-666-FA collected in the Santa Barbara Basin in September and October of 2016 Landslide evacuation zones offshore of Southern California, 2023 Landslide debris aprons offshore of southern California, 2023 Digital maps of submarine landslides and mass wasting features offshore of southern California Landslides offshore of southern California, 2023 Landslide scarps offshore of Southern California, 2023 Landslide mass-wasting zones offshore of Southern California, 2023 Quaternary faults offshore of California