Washington Geological Survey

Welcome to the official website of the Washington Geological Survey. Our team works to understand and share Washington’s geology. We study hazards including tsunamis, earthquakes, landslides, and debris flows; produce maps of geology and aggregate resources; maintain databases of geologic data; and so much more. 

Use the Quick Links sidebar at right for frequently visited pages, and navigate the rest of the website using the menu to the left. 

Read more about the Survey on our about page.

What's New

 

Aggregate resource inventory of Grays Harbor County.

Aggregate Resource Inventory of Grays Harbor County, Washington

On July 10 we released a new aggregate resource map for Grays Harbor County at a scale of 1:100,000. Click to download the Aggregate Resource Inventory of Grays Harbor County (12 MB zip file).

Geophysical survey at Toutle Lake Schools

Reports from the School Seismic Safety Program

On June 25 the School Seismic Safety Program released two new district-level reports for the Index and Toutle Lake School Districts. See the new reports and read more about the program on the School Seismic Safety webpage.

Geophysical map

Geologic and Geophysical Assessment of Tectonic Uplift and Fault Activity in the Doty and Willapa Hills

On May 26 we published a report focused on the Doty fault zone in southwest Washington that refines the neotectonic framework of the area. Click here to download the publication package. 

Debris flow

Alluvial Fan Inventory of Portions of Kittitas, Douglas, and Okanogan Counties, Washington

On Apr 2 we published an alluvial fan inventory of portions of Kittitas, Douglas, and Okanogan Counties. Click here to download the pamphlet and click here to view the data on the Washington Geologic Information Portal. 

Visit the Washington Geology News blog to see more announcements and updates.

Visit the past releases page to see publications released more than three months ago.