Washington vs Wyoming Earthquake Risk

Washington has a higher earthquake risk with a score of 8/10 (High) compared to Wyoming at 6/10 (Moderate-High). This means Washington faces more frequent and potentially more destructive seismic events.

Washington averages approximately 1,000 earthquakes per year, while Wyoming averages about 2,000 per year. Wyoming experiences roughly 1,000 more earthquakes annually.

Washington is associated with Cascadia subduction zone, Seattle Fault. Wyoming is associated with Teton Fault, Yellowstone volcanic zone. These fault systems determine the type and frequency of seismic activity each state experiences.

In Washington, approximately 85% of the population lives in areas at risk from earthquakes, compared to 40% in Wyoming. Washington has a larger percentage of residents exposed to seismic hazard.

Washington's most notable earthquake: 2001 Nisqually (M6.8). Wyoming's most notable earthquake: 1959 Hebgen Lake (nearby, M7.3). These historical events illustrate the seismic potential of each state.