tremor

usgs.gov

There was no earthquake yesterday despite what residents felt in coastal Sussex County and nearby Ocean City, Maryland.

It was more likely a sonic boom caused by an aircraft.

The Lamont Doherty Earth Observatory and Cooperative Seismography Network examined seismographs with one in Lewes and did not find evidence of such a quake.   

Joe Thomas, director of the Sussex County Emergency Operations Center, told the Wilmington News Journal that residents in Millville, Ocean View and Millsboro reported a shaking and rumbling.