This March 12, 2011 file photo a man walks by a collapsed house and debris at Sendai Port in Sendai, northeastern Japan, following Friday's 8.9-magnitude quake. New research appearing

 

              This March 12, 2011 file photo a man walks by a collapsed house and debris at Sendai Port in Sendai, northeastern Japan, following Friday
This March 12, 2011 file photo a man walks by a collapsed house and debris at Sendai Port in Sendai, northeastern Japan, following Friday's 8.9-magnitude quake. New research appearing Thursday July 11, 2013 in the journal Science suggests that such powerful distant quakes can trigger minor shaking around wastewater injection sites in the U.S. Midwest. (AP Photo/Koji Sasahara,File)