NEW YORK (AP) — An earthquake shook the densely populated New York City metropolitan area Friday morning, the U.S. Geological Survey said, with residents across the Northeast reporting rumbling in a region where people are unaccustomed to feeling the ground move.

The agency reported a quake at 10:23 a.m. with a preliminary magnitude of 4.8, centered near Lebanon, New Jersey, or about 45 miles west of New York City and 50 miles north of Philadelphia. U.S.G.S. figures indicated that the quake might have been felt by more than 42 million people.

A map showing an earthquake centered in New Jersey,
Light to weak shaking was felt far beyond the earthquake centered near Whitehouse Station, New Jersey, on April 5, 2024.

New York City’s emergency notification system said in a social media post more than 30 minutes after the quake that it had no reports of damage or injuries in the city.

New Jersey Transit posted on X that its train system was subject to delays caused by bridge inspections. The Philadelphia area's PATCO rail line suspended service out of what it said was "an abundance of caution.”

In midtown Manhattan, the usual cacophony of traffic grew louder as motorists blared their horns on momentarily shuddering streets. Some Brooklyn residents heard a booming sound and their building shaking. In an apartment house in Manhattan’s East Village, a resident from more earthquake-prone California calmed nervous neighbors.

People in Baltimore, Philadelphia, Connecticut, Boston and other areas of the Northeast reported shaking. Tremors lasting for several seconds were felt over 200 miles away near the Massachusetts-New Hampshire border.

The Massachusetts Emergency Management Agency confirmed to GBH News that it had received multiple reports of shaking across the state.

“This serves as an important reminder that the northeast is not immune to the effects of earthquakes,” an agency spokesperson said in an email. They added that everyone should know the steps to stay safe in an earthquake: drop, cover and hold on.

Glenn Ruga told GBH News that he was working at his home in Concord, Massachusetts, when he noticed his computer monitor shaking.

“Our basement's flooding right now from the rains from yesterday. We're going up to Vermont to see the eclipse on Sunday. And now this,” he said. “It just seems like the Earth is making itself known to us in a lot of different ways right now.”

In New York City’s Astoria neighborhood, Cassondra Kurtz was giving her 14-year-old Chihuahua, Chiki, a cocoa-butter rubdown for her dry skin. Kurtz was recording the moment on video, as an everyday memory of the dog’s older years, when her apartment started shaking hard enough that a 9-foot-tall (2.7-meter-tall) mirror banged audibly against a wall.

Kurtz assumed at first it was a big truck going by. The video captured her looking around, perplexed. Chiki, however, “was completely unbothered.”

Attorney Finn Dusenbery was in a law office in midtown Manhattan. “The building shook and I thought that the ceiling above me was going to collapse,” Dusenbery said. “I did think that maybe the building was going to fall down for a second, and I wanted to get out of the building when I felt that.”

At a coffee shop in lower Manhattan, customers buzzed over the unexpected earthquake, which rattled dishware and shook the concrete counter. “I noticed the door trembling on its frame,” said India Hays, a barista. “I thought surely there couldn’t be an earthquake here.”

Solomon Byron was sitting on a park bench in Manhattan’s East Village when he felt an unfamiliar rumble. “I felt this vibration, and I was just like, where is that vibration coming from,” Byron said. “There’s no trains nowhere close by here or anything like that.” Byron said he didn’t realize there had been an earthquake until he got the alert on his cellphone.

The White House said in a statement that President Joe Biden had been briefed on the earthquake and was “in touch with federal, state, and local officials as we learn more.”

New York Gov. Kathy Hochul posted on X that the quake was felt throughout the state. “My team is assessing impacts and any damage that may have occurred, and we will update the public throughout the day,” Hochul said.

Philadelphia police asked people not to call 911 about seismic activity unless they were reporting an emergency. Pennsylvania Gov. Josh Shapiro said state officials were monitoring the situation. A spokesperson for Connecticut Gov. Ned Lamont was unaware of any reports of damage in that state.

The shaking stirred memories of the Aug. 23, 2011, earthquake that jolted tens of millions of people from Georgia to Canada. Registering magnitude 5.8, it was the strongest quake to hit the East Coast since World War II. The epicenter was in Virginia.

That earthquake left cracks in the Washington Monument, spurred the evacuation of the White House and Capitol and rattled New Yorkers three weeks before the 10th anniversary of the Sept. 11 terror attacks.

Associated Press journalists around the country contributed to this report, including Jake Offenhartz and Karen Matthews in New York City, Seth Borenstein in Washington, Mark Scolforo in Harrisburg, Pennsylvania, and Susan Haigh in Hartford, Connecticut.

GBH News editor Matt Baskin contributed material from Massachusetts.