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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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Wildfire can significantly alter the hydrologic response of a watershed to the extent that even modest rainstorms can produce dangerous flash floods and debris flows. The USGS conducts post-fire debris-flow hazard assessments for select fires in the Western U.S. We use geospatial data related to basin morphometry, burn severity, soil properties, and rainfall characteristics to estimate the probability and volume of debris flows that may occur in response to a design storm.
Types: Citation;
Tags: GHSC,
Geologic Hazards Science Center,
LHP,
Landslide Hazards Program,
USGS, All tags...
USGS Science Data Catalog (SDC),
United States,
debris flow,
flash floods,
hazard assessments,
hydrologic response,
landslide hazard,
wildfire, Fewer tags
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This data release documents proposed updates to geologic inputs (faults) for the upcoming 2023 National Seismic Hazard Model (NSHM). This version (1.0) conveys differences between 2014 NSHM fault sources and those recently released in the earthquake geology inputs for the U.S. National Seismic Hazard Model (NSHM) 2023, version 1.0 data release by Hatem et al. (2021). A notable difference between the 2014 and 2023 datasets is that slip rates are provided at points for 2023 instead of generalized along the entire fault section length as in 2014; consequently, slip rates are not provided for fault sections in the draft 2023 dataset. Geospatial data (shapefile, kml and geojson) are provided in this data release with...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Arizona,
California,
Colorado,
Idaho,
Nevada, All tags...
New Mexico,
Oregon,
Texas,
USGS Science Data Catalog (SDC),
Utah,
Washington,
Wyoming,
hazards, Fewer tags
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Time series data of water surface elevation and wave height were acquired at ten locations for 517 days (in three separate deployments) off the north coast of Roi-Namur Island, Kwajalein Atoll, Marshall Islands, in support of a study on the coastal circulation patterns and the transformation of surface waves over the coral reefs. The relative placement of sensors on the reefs were as follows: ROI13W1 and ROI13E1 – fore reef ROI13W2 and ROI13E2 – outer reef flat ROI13W1 and ROI13E1 – middle reef flat ROI13W1 and ROI13E1 – inner reef flat
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: CMHRP,
Coastal and Marine Hazards and Resources Program,
Kwajalein Atoll,
Kwajalein County,
Marshall Islands, All tags...
Oceans,
PCMSC,
Pacific Coastal and Marine Science Center,
Republic of the Marshall Islands,
Roi-Namur,
U.S. Geological Survey,
USGS,
Water Column Features,
geoscientificInformation,
marine water quality,
physical oceanography,
tides,
time series datasets,
waves, Fewer tags
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