Landslides and Landforms Database and Portal Update

The Landslides and Landforms database has been updated in order to fix some attribution issues and its appearance on the Geology Portal  has been given a minor make-over. Updated Citation: Washington Division of Geology and Earth Resources, 2016, Landslides and landforms–GIS data, July 2016: Washington Division of Geology and Earth Resources Digital Data Series 12, […]

Landslide Hazard Geologists at Work

Last month, landslide hazard geologists from the DNR Division of Geology and Earth Resources (DGER) attended a landslide conference hosted by the U.S. Geologic Survey (USGS) and Indonesian Center for Volcanic and Geologic Hazard Mapping at the Cascades Volcano Observatory in Vancouver, Washington. To promote greater cooperation among state and federal agencies, and reduce potential landslide losses, the […]

Meet our New Landslide Hazards Program

Washington’s widely varying climate and topography along with complex geology creates many areas that are prone to landslides.  Identifying past landslides is the best way to identify future landslide hazards. After the devastating SR530 “Oso” Landslide in March 2014, the state legislature recognized the need for a greater emphasis on landslide mapping. Resources were allocated to […]

New and improved! Have another look at DNR’s landslide hazard website

There have been some important changes to our landslide hazard website since we last blogged about it on November 1, 2012. We have improved the resolution of the map by adding the National Weather Service (NWS) forecast zones. A shaded relief of elevation, along with the addition of salt and fresh water features, improves the […]

Shallow landslides can be triggered by rainy weather–Do you know the warning signs?

Heavy rain this weekend can cause more than just localized flooding and high rivers. Prolonged or intense rainfall increases the chances of shallow landslides on steep slopes. During these rain events some rain will flow on the surface to streams and rivers, some is captured by vegetation, and some rain infiltrates into the ground. The […]

April Image of the Month: Ledgewood–Bonair Landslide, Whidbey Island, WA

Thanks to our hazards geologists and landslide experts, Isabelle Sarikhan and Stephen Slaughter, we were able to bring you detailed pictures (including this month’s photo) and information on this large Whidbey Island landslide event immediately after its occurrence on March 27, 2013! As we blogged last week, the hazards team released a Quick Report on […]

More on the March 27 Whidbey Island Landslide Event

DGER geologists who responded to yesterday’s large landslide event, now known as the Ledgewood–Bonair Landslide, have released an unofficial, unedited report detailing their on-site reconnaissance, as well as information pertaining to past observations made of that site. You’ll find this most interesting read here! And click here to download Michael Polenz’s 2009 Geologic Map of […]

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, […]

Rain, Rain, Go Away…

The end of November is typically the wettest two weeks of the year, and today is statistically the wettest of 2012. In Washington State, prolonged or intense rainfall means landslides.Today, amidst the reports of several slides and road closures, the National Weather Service office in Seattle has issued a special weather statement warning for elevated […]