Booms in Pennsylvania being investigated by the FBI

“I thought that somebody was making a tunnel or space junk fell out of the sky,” said Susan Crompton, who lives in Haycock Township.

“From poachers, gunfire, to explosions to a sonic boom,” said Jerry Hertz of the mysterious sound.

There have been no shortages of theories, but still no answer as to why so many residents have been jolted by mysterious and near-deafening sounds.

More.. 

http://philadelphia.cbslocal.com/2018/05/22/police-reported-loud-explosions-bucks-lehigh-counties/

HISTORY