Studies link earthquakes to oil companies injecting caustic wastewater into underground disposal wells.
Recent guidelines order US Marines not to inform Japanese authorities of accidents deemed "politically sensitive," raising concerns that many incidents may have gone unreported.
Dennis Trainor, Jr. is the host and producer of Acronym TV. He has also produced and directed the documentaries American Autumn: an Occudoc and Legalize Democracy. Follow him on twitter (@DennisTrainorJr).