 Trembling was felt in buildings in Philadelphia , Pittsburgh , Altoona , Hollidaysburg , York , State College , Erie , Allentown , Reading , Harrisburg and elsewhere in Pennsylvania . Just before 2 : 00 p.m. , in the midst of an opening game between New England and Europe in the Little League Baseball World Series , many people in South Williamsport experienced a ground shaking <unk> first . Staffers at the Altoona Mirror evacuated their building after it shook for about 10 seconds from the tremor . They returned about 2 : 25 p.m. The third floor of the Blair County Courthouse in Hollidaysburg was evacuated but court sessions continued on the second floor . A house reportedly was moved off its foundation and its roof buckled in the Three Springs area , Huntingdon County Emergency Management Director Adam Miller said . A minor rockslide occurred on Route 453 near The Grier School in Birmingham . In Center City Philadelphia , a window shattered on a lower floor at the Independence Blue Cross building , and the company sent its 3 @,@ 000 employees home for the day . Other office buildings in Center City Philadelphia were also evacuated soon after the earthquake . Workers at the PPL Corporation in Allentown evacuated the building . However , the Three Mile Island nuclear plant south of Harrisburg continued to operate during the earthquake . The Bucks County Courthouse in Doylestown was evacuated after the earthquake . In Philadelphia , SEPTA Regional Rail trains were restricted to a speed of 25 mph ( 40 km / h ) while tracks were inspected for damage , and PATCO Speedline trains were briefly suspended , with no damage reported . The Pennsylvania Department of Transportation inspected bridges across the state for damage . The Delaware River Port Authority reported no damage to its four bridges across the Delaware River . Minor damage was also reported in the Pittsburgh area . 
