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The 2002 U.S. Geological Survey (USGS) National Seismic Hazard Maps display earthquake ground motions for various probability levels across the United States and are applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. This update of the maps incorporates new findings on earthquake ground shaking, faults, seismicity, and geodesy. The resulting maps are derived from seismic hazard curves calculated on a grid of sites across the United States that describe the frequency of exceeding a set of ground motions.
Types: Citation;
Tags: B/C site class boundary,
EHP,
Earthquake Hazards Program,
GHSC,
Geologic Hazards Science Center, All tags...
Hazard Maps,
NEHRP,
National Earthquake Hazard Reduction Program,
National Seismic Hazard Maps,
Seismic Hazard Maps,
USGS,
USGS Science Data Catalog (SDC),
United States,
Vs30,
building codes,
earthquake ground motions,
earthquake probability,
geophysics,
insurance rate structures,
probabilistic hazard maps,
public policy,
risk assessments,
seismic hazard,
seismic hazard curves,
seismic provisions,
spectral accelerations,
tectonic, Fewer tags
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This data release includes the results of analysis of video data conducted by Oregon State University and the geo-habitat interpretation of multibeam echo sounder (MBES) data conducted by the USGS. The data were collected in 2014 and were published in Cochrane and others (2015). This data release accompanies report that describes the project and results in detail (Cochrane and others, 2017). All the data are provided as geographic information system (GIS) files that contain both Esri ArcGIS geotiffs or shapefiles. For those who do not own the full suite of Esri GIS and mapping software, the data can be read using Esri ArcReader, a free viewer that is available at http://www.esri.com/software/arcgis/arcreader/index.html...
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High resolution bathymetric, sea-floor backscatter, and seismic-reflection data were collected offshore of southeastern Louisiana aboard the research vessel Point Sur on May 19-26, 2017, in an effort to characterize mudflow hazards on the Mississippi River Delta front. As the initial field program of a research cooperative between the U.S. Geological Survey, the Bureau of Ocean Energy Management, and other Federal and academic partners, the primary objective of this cruise was to assess the suitability of sea-floor mapping and shallow subsurface imaging tools in the challenging environmental conditions found across delta fronts (for example, variably distributed water column stratification and widespread biogenic...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: BOEM,
Bureau of Ocean Energy Management,
CMGP,
Coastal and Marine Geology Program,
Gulf of Mexico, All tags...
Marine Geology,
Mississippi River Delta front,
Pass a Loutre,
Reson,
South Pass,
Southeast Louisiana,
Southwest Pass,
T20P,
U.S. Geological Survey,
USGS,
WHCMSC,
Woods Hole Coastal and Marine Science Center,
backscatter,
bathymetry,
bathymetry,
field activity number 2017-003-FA,
geoscientificInformation,
location,
marine geology,
marine geophysics,
multibeam backscatter,
multibeam bathymetry,
multibeam echosounder,
multibeam sonar,
navigational data,
oceans,
sea-floor acoustic reflectivity,
shapefile,
trackline navigation, Fewer tags
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We characterized seafloor sediment conditions near the mouth of the Elwha River from underwater photographs taken every four hours from September 2011 to December 2013. A digital camera was affixed to a tripod that was deployed in approximately 10 meters of water (Tripod location from September 2011 to April 2013: 48.15333, -123.55931; tripod location from April 2013 to December 2013: 48.15407, -123.55444). Each photograph was qualitatively characterized as one of six categories: (1) base, or no sediment; (2) low sediment; (3) medium sediment; (4) high sediment; (5) turbid; or (6) kelp. For base conditions, no sediment was present on the seafloor. Low sediment conditions were characterized by a light dusting of...
Categories: Data;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Clallam County,
Elwha River,
Olympic Peninsula,
Remote Sensing,
State of Washington, All tags...
Strait of Juan de Fuca,
dam removal,
oceans,
photography,
sediment,
sedimentation,
sedimentation,
substrate,
time series datasets,
underwater photography, Fewer tags
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High resolution bathymetric, sea-floor backscatter, and seismic-reflection data were collected offshore of southeastern Louisiana aboard the research vessel Point Sur on May 19-26, 2017, in an effort to characterize mudflow hazards on the Mississippi River Delta front. As the initial field program of a research cooperative between the U.S. Geological Survey, the Bureau of Ocean Energy Management, and other Federal and academic partners, the primary objective of this cruise was to assess the suitability of sea-floor mapping and shallow subsurface imaging tools in the challenging environmental conditions found across delta fronts (for example, variably distributed water column stratification and widespread biogenic...
Tags: WHCMSC,
Woods Hole Coastal and Marine Science Center,
chirp,
field activity number 2017-003-FA,
navigational data, All tags...
ocean sciences,
BOEM,
Bureau of Ocean Energy Management,
CMGP,
Coastal and Marine Geology Program,
Gulf of Mexico,
Marine Geology,
Mississippi River Delta front,
Pass a Loutre,
Remote Sensing,
South Pass,
Southeast Louisiana,
Southwest Pass,
U.S. Geological Survey,
USGS,
bathymetry,
boomer,
marine geology,
marine geophysics,
multi-channel streamer,
multibeam sonar,
sea floor,
sea-floor acoustic reflectivity,
seismic reflection methods,
sound velocity profiles,
sparker, Fewer tags
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U.S. Department of the Interior
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U.S. Geological Survey
