Colorado vs Montana Earthquake Risk

Montana has a higher earthquake risk with a score of 6/10 (Moderate-High) compared to Colorado at 4/10 (Moderate). This means Montana faces more frequent and potentially more destructive seismic events.

Colorado averages approximately 50 earthquakes per year, while Montana averages about 150 per year. Montana experiences roughly 100 more earthquakes annually.

Colorado is associated with Rio Grande Rift. Montana is associated with Intermountain Seismic Belt, Lewis & Clark zone. These fault systems determine the type and frequency of seismic activity each state experiences.

In Colorado, approximately 25% of the population lives in areas at risk from earthquakes, compared to 50% in Montana. Montana has a larger percentage of residents exposed to seismic hazard.

Colorado's most notable earthquake: 1882 Northern Colorado (M6.6). Montana's most notable earthquake: 1959 Hebgen Lake (M7.3). These historical events illustrate the seismic potential of each state.