Alaska vs Pennsylvania Earthquake Risk

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

Alaska averages approximately 12,000 earthquakes per year, while Pennsylvania averages about 3 per year. Alaska experiences roughly 11,997 more earthquakes annually.

Alaska is associated with Alaska-Aleutian subduction zone, Denali Fault. Pennsylvania is associated with Minor intraplate zones. These fault systems determine the type and frequency of seismic activity each state experiences.

In Alaska, approximately 95% of the population lives in areas at risk from earthquakes, compared to 3% in Pennsylvania. Alaska has a larger percentage of residents exposed to seismic hazard.

Alaska's most notable earthquake: 1964 Great Alaska (M9.2). Pennsylvania's most notable earthquake: 1994 Reading (M4.6). These historical events illustrate the seismic potential of each state.