A magnitude 4.0 aftershock shakes New York and New Jersey: "There are no reports of significant damage," says the governor. The United States Geological Survey reported that about 12 total aftershocks, with a magnitude of at least 1.8 on the Richter scale, have occurred since this morning's earthquake.
The most powerful aftershock took place this Friday afternoon near Gladstone, New Jersey. It was the largest earthquake to hit the East Coast in a decade, according to the USGS.