Earthquake geology inputs for the National Seismic Hazard Model (NSHM) 2025 (Puerto Rico and U.S. Virgin Islands), version 1.0

This Data Release contains preliminary versions of three related geologic input databases for the Puerto Rico and U.S. Virgin Islands (PRVI) region (62°–70° W and 16°–21° N) of the United States: 1) A fault sections database (“NSHM2025_FaultSections_PRVI_v1’”), which depicts the geometry of faults capable of hosting independent earthquakes, 2) a fault-zone polygon database ("NSHM2025_FaultPolygons_ PRVI_v1"), which depicts the geometry of distributed fault zones capable of hosting repeated large magnitude events but a specific fault source remains unidentified, and 3) An earthquake geology site information database (“NSHM2025_EQGeoDB_ PRVI_v1”), which contains fault slip-rate and earthquake recurrence constraints and categorical slip rates at points on each fault section or fault-zone polygon. These databases were prepared in anticipation of updates to the National Seismic Hazard Model (NSHM) 2025 for the PRVI region. Fault-specific geologic parameters for the NSHM have not been updated since the 2003 NSHM release. These databases are provided as geospatial data (e.g., .SHP, .KML, .GEOJSON file formats) and tables (.CSV format).