Office workers flood the streets at Mount Vernon Square in northwest D.C., on Aug. 23, 2011, following a 5.8-magnitude earthquake that hit the east coast of the United States. The quake had an epicenter of Mineral, Va., east of Charlottesville, but could be felt along much of the Eastern seaboard, including D.C. (Andrew Harnik/The Washington Times)

Photo by: ANDREW HARNIK

Office workers flood the streets at Mount Vernon Square in northwest D.C., on Aug. 23, 2011, following a 5.8-magnitude earthquake that hit the east coast of the United States. The quake had an epicenter of Mineral, Va., east of Charlottesville, but could be felt along much of the Eastern seaboard, including D.C. (Andrew Harnik/The Washington Times)