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An aftershock occurred in the New Jersey area. It is more likely that it will happen

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Seven hours after an earthquake that began in New Jersey shook the East Coast, the United States Geological Survey said an aftershock in and around New Jersey added more rumbling.

The magnitude 4.0 aftershock near Gladstone in Somerset County, New Jersey, was recorded just before 6 p.m. and although it was weaker than Friday morning's earthquake near Whitehouse Station, New Jersey, residents across New Jersey were affected Jersey and parts of Delaware, Pennsylvania and New York have reported feeling the shaking.

The United States Geological Survey said people in the area would likely feel one or more aftershocks in the coming weeks, although many of those quakes will be too weak for anything other than a sensor to detect. At least 14 aftershocks have been recorded so far.

And while it's possible that Friday's earthquake is a foreshock for an even larger earthquake, the United States Geological Survey has predicted that the chance of that happening is only 3%.

If you feel a tremor, experts say you should drop to the ground, seek cover and hold on.

MORE: A magnitude 4.8 earthquake struck New Jersey on Friday morning. What caused it and what's next?

Send story tips or ideas to Hannah Edelman at [email protected]. For more reports, follow them on X below @h_edelman.