Tsunami evacuation routes were developed to assist coastal residents and visitors find safer locations in case of an earthquake and tsunami. The published brochures are for specific areas.

The Geologic Information Portal has a Tsunami Evacuation single-topic map that allows you to search for addresses and locations of interest. The information on the portal and in the brochures is the same.

Inundation maps show areas at risk of inundation by tsunamis that are generated from large earthquakes. These maps are based on model results from hypothetical earthquake scenarios on the Cascadia subduction zone, Seattle fault, or Tacoma fault.

In cooperation with NOAA, we have developed a model based on recent and predicted rainfall data that may forecast hazards and may reduce losses from landslides. Clicking the icon to the right will take you to the forecast map page.

Geologists from the Washington Geological Survey map and characterize faults throughout the state every year. We also combine and publish these data for the entire state.

The Geologic Information Portal has a Natural Hazards single-topic map that shows active faults and earthquakes. Click the "Earthquake Data" button in the Map Contents window to display faults and earthquakes.

The Washington State Seismic Scenario Catalog contains loss estimates for a suite of earthquake scenarios. These scenarios were selected to represent reasonable estimates of the most serious earthquake hazards everywhere in Washington as a basis for planning.

The seismic scenarios used to be available on our Geologic Information Portal but they have now been moved to a separate webpage that provides additional information and download options. The Cascadia subduction zone earthquake scenario is still viewable on the Portal.

In response to the Nisqually earthquake of 2001, the Survey was awarded a grant by FEMA and the Washington Emergency Management Division to develop two types of earthquake hazard maps for every county in the state—liquefaction susceptibility maps, which outline areas where water-saturated sandy soil loses strength during earthquake shaking, and NEHRP (National Earthquake Hazards Reduction Program) site class maps, which outline areas where soils amplify ground shaking. The maps will be used by state and local governments to update existing hazard mitigation plans and to delineate geologically hazardous areas under the Growth Management Act.

The Geologic Information Portal has a Natural Hazards single-topic map that contains the site class, liquefaction, and seismic design categories data. Click the "Ground Response" button in the Map Contents window.

The Survey maintains a database of hazardous mineral locations from mines or prospects known to have produced uranium, mercury, asbestos, or arsenic. The database also contains the locations of mapped ultra-mafic rocks that may potentially contain asbestos and a radon hazard map.

The Geologic Information Portal has data that shows known hazardous mineral locations and radon hazards. Click the "Minerals" button in the Map Contents window.

The Survey works with the U.S. Geological Survey and the Washington Emergency Management Division to study and develop response plans for lahars. Geologists with the Survey have studied lahars as a part of ongoing efforts to map the geology of Washington state. These publications can be searched on the Washington Geology Library catalog.

The Geologic Information Portal has a Natural Hazards single-topic map that contains lahar hazards and land parcels at risk from potential lahar scenarios. Click the "Volcanoes" button in the Map Contents window.

The Geologic Information Portal has a geologic map theme that shows mapped landslides in the state. These landslides are compiled from existing geologic maps. The absence of a mapped landslide does not indicate the absence of landslide hazard. Click the "Landslides" button in the Map Contents window.