Washington State Department of Natural ResourcesThis service contains six point, line, and polygon feature classes pertaining to seismogenic features in Washington State, including: 1) Quaternary active faults, (faults with demonstrable Quaternary-age activity), 2) Quaternary active folds (folds with demonstrable Quaternary-age activity), 3) Fault trenches (locations of excavations made for use in studying and documenting potentially active faults), 4) Earthquakes less than M1.0 (earthquake catalog data obtained from the Pacific Northwest Seismic Network greater than magnitude 1.0 and less than 25 km in depth), 5) Relocated earthquakes less than M1.0 (a subset of the PNSN earthquakes with more accurately located earthquake hypocenters), and 6) Historical earthquake damage (locations, photos, and descriptions of major damage from historical earthquakes in Washington).ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/10322d41caef4b51a5fd56408b2f8bd5_6engState of Washington Geospatial Open Data PortalPublicHistorical Earthquake Photos [Washington (State)]Web servicesWashington (State)Last Modified: 2026-01-27