Arkansas vs Arizona Earthquake Risk

Arkansas has a higher earthquake risk with a score of 5/10 (Moderate) compared to Arizona at 3/10 (Low-Moderate). This means Arkansas faces more frequent and potentially more destructive seismic events.

Arkansas averages approximately 40 earthquakes per year, while Arizona averages about 20 per year. Arkansas experiences roughly 20 more earthquakes annually.

Arkansas is associated with New Madrid Seismic Zone (NE corner). Arizona is associated with Basin and Range faults. These fault systems determine the type and frequency of seismic activity each state experiences.

In Arkansas, approximately 20% of the population lives in areas at risk from earthquakes, compared to 15% in Arizona. Arkansas has a larger percentage of residents exposed to seismic hazard.

Arkansas's most notable earthquake: 1811 New Madrid (epicenter nearby). Arizona's most notable earthquake: 1887 Sonoran (M7.2, felt in AZ). These historical events illustrate the seismic potential of each state.