One of only six eruptions of its size in the Holocene; dramatically changed vegetation in Southern Kyūshū
The Akahoya eruption was the strongest known volcanic eruption of the Kikai Caldera in Kyūshū, Japan. It ejected about 150 cubic kilometres (36 cu mi) of volcanic material, giving it a 7 on the Volcanic Explosivity Index. The Akahoya eruption is one of only six known eruptions reaching that magnitude during the Holocene, or the last twelve thousand years. It dramatically changed vegetation in Southern Kyūshū.
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^Kuwahata, Mitsuhiro (2002). "Age and Cultural Influence of the Kikai-Akahoya Eruption as Seen from Archaeological Material in South Kyushu, Japan". Quaternary Research41 (4): 317–330. doi:10.4116/jaqua.41.317. ISSN0418-2642.
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