Geologic Information Portal

The Washington Geologic Information Portal puts complex geologic and hazards information into the hands of everyone, including you. This application allows you to quickly compare and synthesize data of different types to help solve a variety of problems. Enter the Portal by clicking the icon below.

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Direct downloads for GIS data layers can be found on our GIS Data and Databases page. Layer descriptions and citation information can be found in the metadata for each layer in the download package or on the Geologic Information Portal. If you are unable to locate the citation for a data layer, please contact the Portal Manager.

Help Using the Interactive Portal

Visit our Portal Help for information about portal navigation and tools.

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Single-Topic Maps


The Portal can be complex, so we've made several single-topic maps to simplify things.

  Natural Hazards
Natural hazards interactive map showing information relating to faults, landslides, earthquakes, tsunamis, and volcanoes. Ideal for homeowners.

Layers include: 
  • seismogenic features (faults and folds)
  • landslides 
  • ground response liquefaction susceptibility 
  • tsunami hazards
  • volcano hazards and vents
  • naturally occurring hazardous minerals
  • radon
  • Cascadia, Seattle, and Tacoma earthquake scenarios (note that all other seismic scenarios are no longer on the Portal. They are now available for download here).
  • NEHRP seismic site class
  • seismic design categories
  • earthquake loations
  • historical earthquake damage
  • surface geology
  Tsunami Evacuation Map
Tsunami evacuation information for areas along the Pacific Coast, Strait of Juan de Fuca, and northern Puget Sound communities. Data was developed from tsunami evacuation brochures developed with the cooperation of coastal communities, counties, and the Department of Emergency Management
Layers include: 
  • evacuation routes
  • assembly areas and shelters
  • hazard map publications
  • evacuation brochures
  • sirens
  • walk time evacuation maps
  • reference points
  • hazard areas
  • tsunami scenarios for the Cascadia subduction zone, Seattle Fault, and Tacoma fault
  Geothermal Resources
Geothermal resource interactive map, with temperature, chemistry, geophysical, and fault data along with statewide geothermal favorability modeling.

Layers include: 
  • thermal and mineral springs
  • geothermal permit locations
  • geothermal potential, gradient, and favorability
  • geothermal shear wave data
  • geothermal direct-use data
  • geochronology
  • volcanic vents
  • surface geology
  Subsurface Data
Digital inventory and interactive map of subsurface data, including geotechnical boring logs, test pit logs, and water well records, with lithology information and links to original source documentation.
Layers include: 
  • geotechnical borings 
  • water wells
  • shear wave data
  • thermal and mineral springs
  • geophysical shear wave data
  • gravity and magnetics
  • surface geology
  Earth Resources
Interactive map of active surface mines permitted by DNR and oil and gas exploration wells, with links to scanned geophysical logs and other well permit documents.
Layers include: 
  • active surface mine permit sites
  • geophysical shear wave data
  • surface geology
  Coal Mine Maps
Collection of historic coal mine locations, including links to scanned mine maps. The map collection includes both georeferenced and un-georeferenced maps.
Layers include: 
  • coal mine maps
  • coal resources
  • borehole information
  • water wells
  • surface geology
  • geophysical shear wave data

Other Earth Science Interactive Maps

The National Geologic Map Database (NGMDB) is a congressionally mandated project led by the U.S. Geological Survey and Association of American State Geologists. The purpose is to build a national archive of maps and related data about geology, hazards, earth resources, geophysics, geochemistry, geochronology, paleontology, and marine geology. You can access it through a searchable catalog that contains information on over 88,000 geoscience maps and reports dating back to the 1800s, with links to hundreds of publishers.
The U.S. Geological Survey topoView portal allows you to interactively view the evolution of historical topographic maps stretching back in time to 1880, at a variety of scales ranging from 24k to 250k.
U.S. Geological Survey National Map Viewer A U.S. Geological Survey site that allows you to interactively view "The National Map" data as a map, customize the view, and print a map 
U.S Geological Survey Earth Explorer Allows you to search, download, and order U.S. Geological Survey products from many datasets
USGS 3D Hydrogeologic Framework Model of the Columbia Plateau Regional Aquifer System Web interface allows users to explore a 3-D geologic framework model developed for the Columbia Plateau regional aquifer system as part of a USGS assessment of groundwater availability
Washington Department of Ecology GIS Applications Access to GIS applications that the Department of Ecology uses in accomplishing its mission of protecting the land, air, and waters of the state. Topics include shoreline aerial photos, regulated facilities, coastal atlas, well log viewer, environmental data, and water quality information
United States Department of Agriculture Web Soil Survey Provides soil data and information produced by the National Cooperative Soil Survey. NRCS has soil maps and data available online for more than 95 percent of the nation’s counties. The site is updated and maintained online as the single authoritative source of soil survey information.