An earthquake rattled the Northeastern United States on Friday morning — and a strong aftershock struck in the early evening, around eight hours later.

FiWater shoots from a large crack in the middle of a road after earthquake aftershocks in Randolph, New Jersey,

According to the U.S. Geological Survey, the initial 4.8 magnitude quake was centered 7 kilometers north of Whitehouse Station, N.J., about 50 miles west of New York City, at a depth of 4.7 kilometers. It could be felt as far as south as Washington, D.C., and as far north as Boston.

If you're indoors: Drop, take cover and hold on If you're outdoors: Get into an open area If you’re driving: Come to a stop as quickly and safely as you can