Source of Mysterious Sonic Boom off New Jersey Coast Still Not Found

A map of a sonic boom recorded off the coast of New Jersey on Oct. 25, 2017 at 10:18 a.m. by the USGS. USGS

Rumbling reported in the early morning of Wednesday, Oct. 23, is still baffling officials, who, a day later, haven’t found the cause.

Residents called in to report a loud boom followed by shaking all the way from New Jersey’s southern tip to as far north as Hackettstown, according to a USGS map of the event.