What is Pennsylvania earthquake history?

Pennsylvania's earthquake history is relatively modest compared to more seismically active regions in the United States. Most earthquakes in the state are minor, with magnitudes typically below 4.0. The most significant recorded event was a magnitude 5.2 quake in 1998 near the town of Telford, which caused minimal damage but was felt across a wide area. While large earthquakes are rare, the state experiences occasional tremors due to its location near the Eastern Seaboard's complex geological structures.