Oregon vs South Carolina Earthquake Risk

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

Oregon averages approximately 500 earthquakes per year, while South Carolina averages about 15 per year. Oregon experiences roughly 485 more earthquakes annually.

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

In Oregon, approximately 80% of the population lives in areas at risk from earthquakes, compared to 20% in South Carolina. Oregon has a larger percentage of residents exposed to seismic hazard.

Oregon's most notable earthquake: 1993 Scotts Mills (M5.6). South Carolina's most notable earthquake: 1886 Charleston (M7.3). These historical events illustrate the seismic potential of each state.