A relatively mild, 3.0 magnitude earthquake in New Jersey shook the New York City metropolitan area Saturday night. Here’s what to know.

If the earthquake triggered memories of last year's big shake there are some key differences. Last year's earthquake centered near Tewksbury, New Jersey, was a magnitude 4.8. That's almost 20 times stronger than Saturday night's earthquake.

The epicenter of the 3.0-magnitude quake, which struck around 10:20 p.m. on Saturday, was near Teterboro Airport in New Jersey.