Sonic Boom

For the second time in a month, the ground moved and houses shook in South Jersey

A sonic boom from military aircraft is blamed for Monday's ground rumbling in New Jersey

No, it wasn't an earthquake — but it sure felt like one to people in lots of New Jersey towns.

Seismic activity? A sonic boom? It's not clear what shook New Jersey on Thursday afternoon.

Most of us here on the Jersey Shore and in South Jersey felt the earth shake a few times by what officials are calling a sonic boom. The mystery still remains....What caused the sonic boom? We might never really know what happened, but here are some of the alternative theories that we have come up with: