This is a joint post with Alan Mislove, based on our work with Yong-Yeol Ahn and Chloe Kliman-Silver. On on August 23, 2011, at 1:51 PM EDT a magnitude 5.8 earthquake hit the Piedmont region of the U.S. state of Virginia. Orders of magnitude smaller than the recent earthquake in Japan, this quake was nonetheless… Continue reading TweetQuake