King CountyFor more information about this layer please see the GIS Data Catalog . The King County Sensitive Areas Ordinance (SAO) defines significant seismic hazard areas as those areas of King County subject to severe risk of earthquake damage as a result of seismically induced settlement or soil liquefaction. These conditions occur in areas underlain by cohesionless soils of low density, usually in association with a shallow groundwater table.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/aea4065966b340728d3e711fe487c91e_0engKing County GIS Open DataPublicSeismic Hazards [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2025-07-22