Seaman A. Knapp

Historical marker location:

1200 Independence Avenue Southwest, Southwest Federal Center, District of Columbia

( Marker is at the intersection of Independence Avenue Southwest and 12th Street Southwest, on the left when traveling west on Independence Avenue Southwest.)

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.