Reuters: Inside the small U-Haul rental office in Guthrie, Oklahoma, Tami Boxley routinely deals with something that once was rare: the rattling, booming roll of the earth. In the last week alone, residents of Guthrie, pop. 10,191, have felt five quakes rock the town a half hour's drive from Oklahoma City. The most recent rippled through Friday after lunchtime, duly recorded on the "QuakeWatch" application many residents have loaded onto their smartphones. The local newspaper runs a weekly column updating...