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.


We've released a new version of our Portal!

On Friday, February 12, we released a new version of the Geologic Information Portal. Many of the changes have been made in the background and will not affect how you use the Portal. However, there are a few differences that you might notice:

What's New

  • Table of Contents: The table of contents has a slightly different look and feel and some of the layers have been rearranged under different headings to make them easier to find.
  • Tools: Some of the tools available at the bottom of the screen by clicking on the colored circles have been removed or changed to make them more stable and easier to use. The biggest difference you may notice is that the 'Query' tool has been removed. This tool was previously used to search within a layer for features that match certain criteria, such as 'must contain the word sandstone'. This capability is now available in the attribute table.
  • Attribute Table: The attribute table is much cleaner and easier to navigate and now offers the option to search within the table (in the field that says 'Filter'). You can also sort by columns (by clicking on the black square with three dots to the right of each column heading in the attribute table).
  • Legend: The legend has a cleaner, clearer look and feel.
  • Basemaps: You will now see that there are many more basemaps for you to choose from by clicking on the 'Basemap' tool at the bottom of the screen.
  • Download Button: We are currently working on an improved download process that will allow you to view metadata (information about the dataset) alongside a variety of download and viewing options. As we work on this we have temporarily set up the 'Download' button so that it directs you to our GIS Data and Databases webpage where you can see a list of all our geodatabases and select the one you would like to download.
  • Description Button: When you click the stack of three lines to the right of a layer you are interested in, you will see the option to click 'Description'. If you click this you will get a pop-up box that gives you more information about the dataset and explains what you are looking at.
  • Subsurface Database: The subsurface database has been modified to be scale-dependent. That means that the layers will not show up until you have zoomed in to a specific scale. This dataset is very large, so the change will help the data load faster by limiting them to your field of view. The names of the layers in the table of contents will remain grayed-out until you zoom in to the right scale.
  • Seismic Scenarios Catalog: In the previous version of the Portal we provided a suite of data showing the modeled impacts of various earthquake scenarios. We have now moved all but one of these to a separate webpage that provides more background on the data and how they were developed. You can access that webpage here. You will still find the scenario for a modeled Cascadia subduction zone earthquake on the Portal. It is under the heading 'Earthquakes' in the table of contents.

If you have any questions about the new Portal or are having trouble navigating it, please don't hesitate to contact us (Susan Schnur, There is also a comprehensive Help page to accompany the Portal, which you can find here.


Help Using the Interactive Portal

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

Tell us what you think of the new site:

Can't find something and wonder
where it is? Email us
Help us make the Portal even better

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 earthquakes)
  • landslides 
  • ground response to earthquakes 
  • tsunami evacuation 
  • tsunami inundation
  • volcano hazards
  • naturally occurring hazardous minerals
  • radon
  • Cascadia subduction zone earthquake scenario (note that all other seismic scenarios are no longer on the Portal. They are now available for download here).
  • coal mine maps and locations
  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 and zones
  • assembly areas
  • local landmarks
  • evacuation brochure boundaries
  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 wells
  • geothermal direct-use data
  • geothermal favorability modeling
  • geophysical data
  • volcanic vents
  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
  • oil and gas wells
  • geothermal wells
  • geothermal direct-use sites
  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
  • dry oil and gas holes (with scanned documents)
  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 locations
  • georeferenced maps

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.