Here are some of the first tweets from the affected area.
@__Deb (New Jersey): Okay, we just either had a small earthquake or there was a big explosion somewhere nearby
@rdy2freefall (Mendham, N.J.): Omg did anyone else feel that? Legit I think there was just a mini earthquake in jersey!
One New Jersey resident, @devyanks90 did not think earthquake at first.
@devyanks90 (Dover, N.J.): gas line explosion somewhere in town. the house shook pretty badly
He soon corrected himself.
@devyanks90 (Dover, N.J.): no gas line explosion. only a minor earthquake (2.9-3.5) this might be a first for new jersey