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For designing buildings and other structures to safely resist earthquakes, the 2009 National Earthquake Hazards Reduction Program (NEHRP) Recommended Seismic Provisions and the 2010 American Society of Civil Engineers, Structural Engineering Institute (ASCE/SEI) 7 Standard contain maps of Risk-Targeted Maximum Considered Earthquake (MCER) spectral response accelerations, Maximum Considered Earthquake Geometric Mean (MCEG) peak ground accelerations, and long-period transition periods (TL). The MCER ground motions are also in the 2013 ASCE/SEI 41 Standard and the 2012 and 2015 editions of the International Building Code. The MCER, MCEG, and TL maps are derived from the U.S. Geological Survey (USGS) National Seismic...
For designing buildings and other structures to safely resist earthquakes, the 2009 NEHRP Recommended Seismic Provisions and the 2010 ASCE/SEI 7 Standard contain maps of Risk-Targeted Maximum Considered Earthquake (MCER) spectral response accelerations and maps of Maximum Considered Earthquake Geometric Mean (MCEG) peak ground accelerations. Identical values from the MCER maps are also in the 2013 ASCE/SEI 41 Standard and the 2012 and 2015 editions of the International Building Code. The MCER and MCEG ground motion maps are derived from USGS National Seismic Hazard Models via the gridded values of this data release. The data files in the "Child Items" below also underlie the corresponding USGS Seismic Design Web...
For designing buildings and other structures, the 2015 NEHRP Recommended Seismic Provisions and the 2016 ASCE/SEI 7 Standard contain maps of Risk-Targeted Maximum Considered Earthquake (MCER) spectral response accelerations and maps of Maximum Considered Earthquake Geometric Mean (MCEG) peak ground accelerations. The MCER ground motions are also in the 2017 ASCE/SEI 41 Standard and the 2018 and 2021 editions of the International Building Code. These MCER and MCEG ground motion maps are derived from USGS National Seismic Hazard Models via the gridded values of this data release. The data files in the "Child Items" below also underlie the corresponding USGS Seismic Design Web Services. See the "Related External Resources"...
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This data release contains data sets associated with the 2023 50-State National Seismic Hazard Model Update. The 2023 50-State National Seimsic Hazard Model (NSHM) Update includes an update to the NSHMs for the conterminous U.S (CONUS, last updated in 2018), Alaska (AK, last updated in 2007), and Hawaii (last updated in 2001). Data sets include inputs like seismicity catalogs used as input to the smoothed seismicity model and updated induced seismicity zone polygons in the central and eastern U.S., as well as outputs like hazard curves and uniform-hazard ground motion values. Plots of selected data sets are also included. The data sets provided here are primarily for the 2023 CONUS NHSM and 2023 AK NSHM. Additional...
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These data were calculated to estimate seismic hazard, risk, and design across South America using the latest data, models, and methods. The input data to the model, as well as the output data are available here. The input data includes a seismicity catalog, seismicity rate models, evaluation of earthquake sizes, fault geometry and rate parameters, and ground-motion models. Output data include hazard curves, and associated products, for peak ground acceleration and spectral accelerations at 0.2 and 1 s periods.
For designing buildings and other structures, the 2020 NEHRP Recommended Seismic Provisions and the 2022 ASCE/SEI 7 Standard provide Risk-Targeted Maximum Considered Earthquake (MCER) spectral response accelerations and Maximum Considered Earthquake Geometric Mean (MCEG) peak ground accelerations. The MCER ground motions are also expected to be in the 2023 ASCE/SEI 41 Standard and the 2024 and 2027 editions of the International Building Code. Both sets of ground motions are derived from USGS National Seismic Hazard Models via the gridded values of this data release. The files in the "Child Items" below also underlie corresponding USGS Seismic Design Web Services. See the "Related External Resources" below for...
For designing bridges to safely resist earthquakes, the 2023 editions of the AASHTO (1) Guide Specifications for LRFD Seismic Bridge Design, (2) LRFD Bridge Design Specifications, and (3) Guide Specifications for Seismic Isolation Design provide risk-targeted design ground motions via this data release and the corresponding USGS Seismic Design Web Services (listed below). The web services spatially interpolate the gridded ground motions of this data release for user-specified latitudes and longitudes. All of the data files within the regional "Child Items" below were derived from respective USGS National Seismic Hazard Models (cited below). Details of the derivation will be added to this data release upon publication...
    map background search result map search result map Seismic Hazard, Risk, and Design for South America Gridded earthquake ground motions for the 2015 NEHRP Recommended Seismic Provisions and 2016 ASCE/SEI 7 Standard Data Release for the 2023 U.S. 50-State National Seismic Hazard Model - Overview Seismic Hazard, Risk, and Design for South America Data Release for the 2023 U.S. 50-State National Seismic Hazard Model - Overview Gridded earthquake ground motions for the 2015 NEHRP Recommended Seismic Provisions and 2016 ASCE/SEI 7 Standard