There are 71 earthquake incidents in Pennsylvania on record since 1931. The state averages 1 earthquakes per year. The largest earthquake on record for Pennsylvania occurred on 01/16/1994, with a depth of 5.0 miles and a magnitude of 4.6 on the Richter scale in Berks County, PA.
Yearly Average Number of Earthquakes in Pennsylvania
Total Number of Earthquakes in Pennsylvania since 1931