The new state DNR simulations show how a tsunami would hit Washington in the event of a magnitude 9.0 earthquake along the Cascadia Subduction Zone. The worst of the tsunami would hit the Pacific Coast and San Juan Islands area — but the interior of Puget Sound between Edmonds, Tacoma, and Hoodsport could see waves 10 feet or higher, the simulation shows.
In the simulation, areas that get hit hardest in Puget Sound are highlighted in red. Locally, Tacoma’s Commencement Bay and the southern ends of Vashon and Maury islands get hit with the worst of the waves, the simulation shows.
“A small nondestructive tsunami in one place may be very large and violent a few miles away. This is because coastal areas have different beach slopes and different offshore and coastal geographical features, such as reefs, bays, and river mouths,” the state DNR describes on its tsunami hazards webpage.
The state has mapped some tsunami areas in Puget Sound. Luckily, many of the areas that will be hit hardest are not very residential, like Sodo in Seattle. You can check this state map to see if your neighborhood is at risk during a tsunami.