Gridded earthquake ground motions for the 2023 ASCE/SEI 41 Standard outside of the conterminous United States

For evaluating and retrofitting existing buildings to resist earthquakes, the 2023 ASCE/SEI 41 Standard provides Basic Safety Earthquake spectral response accelerations at four levels (BSE-1N, BSE-2N, BSE-1E, and BSE-2E). This data release covers BSE-1E and BSE-2E spectral response accelerations for sites outside of the conterminous United States. For sites in the conterminous U.S., BSE-1E and BSE-2E values are provided via the USGS National Seismic Hazard Model Static Hazard Curve Services (linked below). BSE-1N and BSE-2N values for all sites are provided via the ASCE 7-22 data release (linked below). The USGS ASCE 41-23 web service (linked below) corresponding to this data release returns maximum direction spectral response accelerations for all four BSE levels for user-specified latitudes, longitudes and site classes. The maximum-direction scale factors that have been used are attached below.