Idaho vs Utah Earthquake Risk

Utah has a higher earthquake risk with a score of 7/10 (High) compared to Idaho at 6/10 (Moderate-High). This means Utah faces more frequent and potentially more destructive seismic events.

Idaho averages approximately 100 earthquakes per year, while Utah averages about 200 per year. Utah experiences roughly 100 more earthquakes annually.

Idaho is associated with Lost River, Lemhi, Beaverhead faults. Utah is associated with Wasatch Fault Zone. These fault systems determine the type and frequency of seismic activity each state experiences.

In Idaho, approximately 45% of the population lives in areas at risk from earthquakes, compared to 80% in Utah. Utah has a larger percentage of residents exposed to seismic hazard.

Idaho's most notable earthquake: 1983 Borah Peak (M6.9). Utah's most notable earthquake: 2020 Magna (M5.7). These historical events illustrate the seismic potential of each state.