YAMAGUCHI—An eruption of Mount Aso in Kumamoto Prefecture 90,000 years ago created a pyroclastic flow that traveled 170 kilometers north to the Sabagawa river here, the longest such distance ...
Mount Aso in Kumamoto Prefecture erupted shortly before noon on Oct. 20, sending a massive plume of dark volcanic smoke up to 3,500 meters high. The first crater of Mount Nakadake erupted ...