Arkansas vs Oregon Earthquake Risk

Oregon has a higher earthquake risk with a score of 8/10 (High) compared to Arkansas at 5/10 (Moderate). This means Oregon faces more frequent and potentially more destructive seismic events.

Arkansas averages approximately 40 earthquakes per year, while Oregon averages about 500 per year. Oregon experiences roughly 460 more earthquakes annually.

Arkansas is associated with New Madrid Seismic Zone (NE corner). Oregon is associated with Cascadia subduction zone, Klamath graben. 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 80% in Oregon. Oregon has a larger percentage of residents exposed to seismic hazard.

Arkansas's most notable earthquake: 1811 New Madrid (epicenter nearby). Oregon's most notable earthquake: 1993 Scotts Mills (M5.6). These historical events illustrate the seismic potential of each state.