A light, 4.8-magnitude earthquake struck in New Jersey on Friday, according to the United States Geological Survey. The quake was felt across the New York City metropolitan area, and from Philadelphia to Boston.
The temblor happened at 10:23 a.m. Eastern about 4 miles north of Whitehouse Station, N.J., data from the agency shows.
As seismologists review available data, they may revise the earthquake’s reported magnitude. Additional information collected about the earthquake may also prompt U.S.G.S. scientists to update the shake-severity map.
Aftershocks in the region
At 5:59 p.m. Eastern on Friday, a light aftershock with a magnitude of 3.8 struck near Gladstone, New Jersey, according to U.S.G.S. (The agency initially gave the quake a preliminary magnitude of 4.0.)
An aftershock is usually a smaller earthquake that follows a larger one in the same general area. Aftershocks are typically minor adjustments along the portion of a fault that slipped at the time of the initial earthquake.
Aftershocks can occur days, weeks or even years after the first earthquake. These events can be of equal or larger magnitude to the initial earthquake, and they can continue to affect already damaged locations.
How this quake compares
The U.S.G.S. has logged 188 earthquakes with a magnitude of 2.5 or greater within a 250-mile radius of New York City since 1957. In that timeframe, only seven have had a magnitude at or above 4.5. Today’s quake had the third-highest magnitude in the available data.
