What caused Friday's earthquake in New Jersey?

Why are there earthquakes in NJ?

New Jersey Earthquake Explained

Earthquake captured on home cameras the moment it shakes N.J.

'What the heck was that?': earthquake hits New Jersey

Earthquake, aftershocks shake New York, New Jersey

4.8 magnitude earthquake shakes New York City, New Jersey

Earthquake in N.J. caught on home's security camera

Earthquake shakes parts of New Jersey

12 News Now: New Jersey earthquake felt in Southern New England

2.9-magnitude earthquake recorded in Gladstone, New Jersey

Earthquake Hits During Evening Newscast

Earthquake in NJ felt by residents in Montgomery County, Pa.

Smart Bird Doesn't Want to Get Caught in Hail Storm #shorts

4.8 Magnitude earthquake centered in New Jersey rattles the East Coast

Earthquake shakes Northeast, New York City

New Jersey Earthquake Update; The Largest Earthquake in 140 Years

4.8 earthquake reported in New Jersey is one of the largest to hit the area, expert says

Magnitude 3.1 Earthquake Hits Central New Jersey

N.J. Earthquake