Rumbling in New Jersey and Pennsylvania remains a mystery

WILDWOOD, N.J. (WPVI) -- A rumbling sensation reported by many residents in our area remains a mystery.

The calls came into Action News around 10:30 a.m. Wednesday from parts of Philadelphia, Bucks County and across South Jersey.

Some had wondered if it was a minor earthquake, but the United States Geological Survey said no official seismic activity was recorded.

In the past, such reports