Arkansas Earthquakes Could Be Man-Made

The small earthquakes that struck north central Arkansas could be from a combination of natural and man-made activity.

Some experts think that pumping water into the ground as part of the extraction process of natural gas could cause local seismic events. But the area hasn't been studied enough, they say, to know for sure.

FULL ARTICLE: http://www.ibtimes.com/articles/117167/20110228/arkansas-earthquake-natu...