Abundant evidence indicates that such a new volcano exists at L'ihi, a seamount (or submarine peak) located about 20 miles off the south coast.
In 2011, a 9.0-magnitude earthquake -- one of the worst ever to hit Japan -- killed more than 20,000 people and caused tsunamis of up to 12 meters (40 feet) which swamped the Fukushima Daiichi nuclear power plant, triggering a nuclear meltdown. Fukushima resident: We live in fear.
The mega-thrust earthquake that hit Japan on March 11, 2011, was the strongest to hit Japan and one of the top five largest earthquakes in the world since seismological record-keeping began. It was followed by a tsunami with waves of up to 10 m (33 ft).