The pyroclastic flow and volcanic ash spewed out by the Aira caldera in southern Kagoshima Prefecture in Kyushu was 1.5 times larger than previous research estimates and reached a depth of about ...

Mark Stelten, deputy scientist-in-charge at the YVO, explained that while the idea of a "super-eruption"—which would spew catastrophic amounts of ash and ... moving lava flow that wouldn't ...

Volcanoes throw out vast quantities of ash, gases, and pumice. The flow, known as a pyroclastic ... scientists wrote in a new study. The Kikai Caldera is situated south of Kyusyu Island in ...

Past volcanic activity at the caldera has ranged from the output of lava flows to the explosion of large volumes of ash. The last eruption in the region — a lava flow — was over 70,000 years ago.