The south is SINKING: Giant chunks of the Earth's mantle are falling off and causing quakes across the southeastern US - and more are coming, warn researchers

Area hit by a series of strange unexplained quakes 

Most recent was 2011 magnitude-5.8 earthquake near Mineral, Virginia

Area should be seismically quiet as it is in middle of Earth's tectonic plate

Read more: http://www.dailymail.co.uk/sciencetech/article-3573759/Giant-chunks-Earth-s-mantle-FALLING-causing-quakes-southeastern-coming-warn-researchers.html#ixzz47mgb65fl