Oregon vs Pennsylvania Earthquake Risk

Oregon has a higher earthquake risk with a score of 8/10 (High) compared to Pennsylvania at 2/10 (Low). This means Oregon faces more frequent and potentially more destructive seismic events.

Oregon averages approximately 500 earthquakes per year, while Pennsylvania averages about 3 per year. Oregon experiences roughly 497 more earthquakes annually.

Oregon is associated with Cascadia subduction zone, Klamath graben. Pennsylvania is associated with Minor intraplate zones. These fault systems determine the type and frequency of seismic activity each state experiences.

In Oregon, approximately 80% of the population lives in areas at risk from earthquakes, compared to 3% in Pennsylvania. Oregon has a larger percentage of residents exposed to seismic hazard.

Oregon's most notable earthquake: 1993 Scotts Mills (M5.6). Pennsylvania's most notable earthquake: 1994 Reading (M4.6). These historical events illustrate the seismic potential of each state.