The market has sold off here a bit on this earthquake (5.9ish) in VA.  While it may be a knee jerk reaction anytime you feel a tremor around D.C. or NYC (where many people on twitter said it was felt as well) very bad thoughts immediately come to mind.

A 5.9-magnitude earthquake shook Washington, D.C. and Virginia on Tuesday afternoon, according to the U.S. Geological Survey. The quake, which was centered 83 miles southwest of the nation's capital and 41 miles northwest of Richmond, Va., occurred at 1:51 p.m. Eastern. Parts of the White House, U.S. Capitol building and the Pentagon were reportedly evacuated. Originating at a depth of less than a mile, the tremor was widely felt in the D.C. metro area and as far away as New York City.