Middle America Is Experiencing a Massive Increase in 3.0+ Earthquakes

Middle America Is Experiencing a Massive Increase in 3.0+ Earthquakes by Alexis Madrigal, April 6, 2012, The Atlantic
A new United States Geological Survey study has found that middle America between Alabama and Montana is experiencing an “unprecedented” and “almost certainly manmade” increase in earthquakes of 3.0 magnitude or greater. In 2011, there were 134 events of that size. That’s six times more than were normally seen during the 20th century.