A 5.9-magnitude earthquake centered near Richmond, Va., led to the evacuation of certain key government buildings in Washington D.C. and some scary moments for millions of people up and down the eastern seaboard.

House and Senate office buildings were evacuated, as the structures shook for several seconds. The Pentagon, which is the biggest office complex in the world, has a partial evacuation.

The Department of Homeland Security building was also evacuated, an official said.

Union Station was also evacuated. According to the Washington Post, during the quake, some patrons ran for the doors.

The Post also reported that part of a building in southeast DC collapsed.

 “A huge dust cloud came from the BBT building,” a witness told the paper, and “the people who came out of it said the back collapsed.”