South Carolina vs Washington Earthquake Risk

Washington has a higher earthquake risk with a score of 8/10 (High) compared to South Carolina at 5/10 (Moderate). This means Washington faces more frequent and potentially more destructive seismic events.

South Carolina averages approximately 15 earthquakes per year, while Washington averages about 1,000 per year. Washington experiences roughly 985 more earthquakes annually.

South Carolina is associated with Middleton Place-Summerville Seismic Zone. Washington is associated with Cascadia subduction zone, Seattle Fault. These fault systems determine the type and frequency of seismic activity each state experiences.

In South Carolina, approximately 20% of the population lives in areas at risk from earthquakes, compared to 85% in Washington. Washington has a larger percentage of residents exposed to seismic hazard.

South Carolina's most notable earthquake: 1886 Charleston (M7.3). Washington's most notable earthquake: 2001 Nisqually (M6.8). These historical events illustrate the seismic potential of each state.