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・ Akagi Maru-class Armed merchantmen
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Akahoya eruption
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Akahoya eruption : ウィキペディア英語版
Akahoya eruption

The Akahoya eruption was the strongest known volcanic eruption of the Kikai Caldera in Kyūshū, Japan. It ejected about 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.
Archaeologically it has been dated around 7,300 cal. BP during the Earliest Jōmon period, but it has also been radiocarbon dated to 6,500 BP.
==References==



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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