USGS map of where the earthquake was felt
An earthquake centered in northern New Jersey was felt in a large area that included Delaware.
The United States Geological Survey reported the quake was located near White Horse Station, an outer suburb of New York City and home of pharmaceutical giant Merck. White Horse station is about an hour and 45 minute drive from the Delaware Memorial Bridge.
There was no initial report of damage.
The 4.8 tremor is believed to be the most powerful since a 2011 earthquake centered in Virginia damaged the Washington Monument and other Washington, D.C. landmarks
