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A 5.8-magnitude earthquake rocked D.C.one year ago Thursday, and today there are still signs of damage at local landmarks, including the National Cathedral.
Another earthquake shook Virginia early Tuesday.
Louisa County has been rattled by another minor earthquake.
The 555-foot obelisk at the apex of the National Mall closed for repairs in the wake of the August 2011 earthquake. The Washington Post now reports they could stay closed as late as 2014.
Tags: Washington Monument,
Last year saw a sharp rise in 3.0-magnitude quakes or stronger in the U.S. midcontinent, a continuing trend that prompted the U.S. Geological Survey -- the government's main source for Earth sciences -- to investigate the root cause.
Experts are trying to determine whether the National Mall and the nation's monuments are sinking and whether the August earthquake made it worse.
Virginia continues to experience aftershocks from last summer's earthquake.
A magnitude 3.1 earthquake struck just outside Mineral, Va. late Sunday night.