Gridded earthquake ground motions for the 2020 NEHRP Recommended Seismic Provisions and 2022 ASCE/SEI 7 Standard

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 links to the building code reference documents (which include explanations of differences with respect to prior editions), the USGS National Seismic Hazard Models used, and the corresponding USGS web services.