Lava building up in volcano near Japan's southerly islands

A submerged volcano off the coast of Japan that erupted 7,300 years ago could be preparing to make a comeback.  Scientists have discovered evidence of a giant dome of lava in the Kikai volcano's collapsed magma chamber.They believe it contains about 32 cubic km (7.68 cubic miles) of magma, and distortions on its surface suggest the dome is growing.Currently the dome is around  6.2 miles (10 kil...