Newly Published: San Juan Tsunami Inundation Hazard Maps

Tsunami Hazard Maps of the San Juan Islands, WA —Model Results from a Cascadia Subduction Zone Earthquake Scenario This new publication is part of a collaborative effort to show areas at risk of inundation by tsunamis that are generated from large earthquakes. See other reports and maps on our Tsunami Inundation webpage. For more on […]

October Geology Image of the Month: Glacier Peak along the Pacific Crest Trail

The October Geology Image of the Month was submitted by DGER Geologist, Eric Schuster. It shows the west side of Glacier Peak (elev. 10541 ft.), a young stratovolcano located in the Cascade Range, eastern Snohomish County, Washington. Prominent glaciers are the Kennedy Glacier, center of photo, and the Ptarmigan Glacier, to the left. Striking is […]

July Geology Image of the Month: Ghost Forest Near the Mouth of the Copalis River, Grays Harbor County

The ghostly tree trunks of once-submerged red cedars pictured in the July Image of the Month have played a key role in helping geologists reconstruct the events of the last Cascadia Subduction Zone (CSZ) magnitude 9 earthquake. As DGER chief hazards geologist, Tim Walsh, recently explained to a National Geographic television crew (see image below), […]

Aberdeen Landslides and Liquefaction Susceptibility Report Published

The Washington State Geologic Survey announces the publication of Report of Investigations 36. Earthquake-induced landslide and liquefaction susceptibility and initiation potential maps for tsunami inundation zones in Aberdeen, Hoquiam, and Cosmopolis, Grays Harbor County, Washington, for a M9+ Cascadia subduction zone event, by S. L. Slaughter, T. J. Walsh, Anton Ypma, K. M. D. Stanton, […]

Launch of the Seismic Scenarios Catalog

Today Washington State Geological Survey scientists were on hand as John Schelling, earthquake program manager for the Washington Military Department Emergency Management Division (EMD), presented a live webinar release of the Seismic Scenario Catalog, hosted through DNR in a GIS environment. The catalog is a compilation of results from 20 scenario models run using FEMA’s […]