Updated Washington Tsunami Design Zone for the New Washington State Building Code

Tsunami hazards in Washington State Tsunamis are large and potentially dangerous waves caused by earthquakes, landslides, volcanic eruptions, exceptional weather systems, and meteorite impacts. Tsunamis have struck Washington in the past, and are expected to do so again in the future. You can learn more about tsunami hazards on the WGS website. The Washington Geological […]

New Tsunami Modeling Released for the Chehalis, Hoquiam, Willapa, and Wishkah Rivers

We have released new tsunami inundation and current speed maps for the Chehalis, Hoquiam, Willapa, and Wishkah Rivers in Grays Harbor and Pacific Counties. The maps show the modeled inundation from a Cascadia subduction zone earthquake scenario. Tsunami Hazard Maps of the Chehalis, Hoquiam, Willapa, and Wishkah Rivers—Model Results from a L1 Mw 9.0 Cascadia […]

New Lidar Story Map for GIS Day!

To celebrate GIS Day, the Washington Geological Survey has released a new story map titled: The Bare Earth—How lidar in Washington state exposes geology and natural hazards. Geologists in Washington State use lidar to map landslides and faults, to study volcanoes, glaciers and rivers, and to model tsunami inundation. This narrative features over 50 intriguing […]