This hypothetical Cascadia tsunami is assumed to be generated by a Mw 9.0 earthquake off the Pacific Northwest Coast of the U.S. The length of the rupture is estimated to be 1000 km with a width of 83 km. In approximately 15 minutes, the tsunami would be first recorded at tsunameter/DART® buoys 46404, 46407, 46411 and 46419. Model results shown below were created with the NOAA forecast method using MOST model with the tsunami source as described in Witter et al. (2011).

The graphics display research model results, showing qualitative and quantitative information about the tsunami, including tsunami wave interaction with ocean floor bathymetric features, and neighboring coastlines. Tsunami model amplitude information is shown color-coded according to the scale bar. Offshore tsunami wave amplitude was estimated based on the source described by Witter et al. (2011).

• Model amplitudes calculated with the MOST forecast model. Filled colors show maximum computed tsunami amplitude in cm during 24 hours of wave propagation.
• Global propagation animation on YouTube and .mp4 format
• US West coast propagation animation on YouTube and .mp4 format

Preparedness Links for Washington State

• Washingon State Department of Natural resources(DNR): tsunami evacuation maps by county
• Washington State Emergency Management Division (EMD): provides links to
  • Tsunami Warnings and Information
  • Understanding Tsunami Hazard in Washington
  • Tsunami Preparedness Information
  • Project Safe Haven