Science View S2012E20 - Follow-on Disasters after the Megaquake

The magnitude-9.0 megaquake that struck Japan on March 11th, 2011 induced many more earthquakes across country, some of them in places where quakes almost never happen. In addition, there are twenty Japanese volcanoes that rumbling more since megaquake. A mass of data on these quakes and volcanoes is being studied for clues as to where the next megaquake will strike, and what we can do to mitigate the damage. What exactly has been happening underneath Japan? We report on the latest science.