Montana vs Wyoming Earthquake Risk

Montana and Wyoming share the same risk score of 6/10 (Moderate-High). Both states face similar levels of seismic hazard, though the specific fault systems and earthquake characteristics differ.

Montana averages approximately 150 earthquakes per year, while Wyoming averages about 2,000 per year. Wyoming experiences roughly 1,850 more earthquakes annually.

Montana is associated with Intermountain Seismic Belt, Lewis & Clark zone. Wyoming is associated with Teton Fault, Yellowstone volcanic 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 40% in Wyoming. Montana has a larger percentage of residents exposed to seismic hazard.

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