Montana vs South Carolina Earthquake Risk

Montana has a higher earthquake risk with a score of 6/10 (Moderate-High) compared to South Carolina at 5/10 (Moderate). This means Montana faces more frequent and potentially more destructive seismic events.

Montana averages approximately 150 earthquakes per year, while South Carolina averages about 15 per year. Montana experiences roughly 135 more earthquakes annually.

Montana is associated with Intermountain Seismic Belt, Lewis & Clark zone. 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 Montana, approximately 50% of the population lives in areas at risk from earthquakes, compared to 20% in South Carolina. Montana has a larger percentage of residents exposed to seismic hazard.

Montana's most notable earthquake: 1959 Hebgen Lake (M7.3). South Carolina's most notable earthquake: 1886 Charleston (M7.3). These historical events illustrate the seismic potential of each state.