"4-in. 40 caliber rifles"

Historical marker location:

Navy Yard, District of Columbia

( Marker is on Isaac Hull Avenue, SE north of Anacostia Riverwalk Trail, on the right when traveling south.)

The District was the site of a major earthquake in 2011: On August 23, 2011, a 5.8 magnitude earthquake struck the East Coast of the United States, with its epicenter located in Mineral, Virginia. The quake was felt strongly in Washington, D.C., causing damage to several buildings, including the Washington Monument and the National Cathedral.