Akahoya eruption
| Akahoya eruption | |
|---|---|
| Volcano | Kikai Caldera |
| Date | 6,500 years ago |
| Type | Ultra Plinian |
| Location | Kyūshū, Japan 30°47′20″N 130°18′29″E / 30.789°N 130.308°E |
| VEI | 7 |
| Impact | 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[clarification needed] vegetation in Southern Kyūshū.[1]
Archaeologically it has been dated around 7,300 cal. BP during the Earliest Jōmon period,[2] but it has also been radiocarbon dated to 6,500 BP.[3]
References
- ^ Sugiyama, Shinji (2002). "The Impact of the Kikai-Akahoya Explosive Eruption on Vegetation in Southern Kyushu, Japan, Clarified by Phytolith Studies". Quaternary Research. 41 (4): 311–316. doi:10.4116/jaqua.41.311. ISSN 0418-2642.
{{cite journal}}: Cite has empty unknown parameter:|month=(help) - ^ Kuwahata, Mitsuhiro (2002). "Age and Cultural Influence of the Kikai-Akahoya Eruption as Seen from Archaeological Material in South Kyushu, Japan". Quaternary Research. 41 (4): 317–330. doi:10.4116/jaqua.41.317. ISSN 0418-2642.
- ^ Maeno, Fukashi; Taniguchi, Hiromitsu (2005). "Eruptive History of Satsuma Iwo-jima Island, Kikai Caldera, after a 6.5ka Caldera-forming Eruption". Bulletin of the Volcanological Society of Japan. 50 (2): 71–85. ISSN 0453-4360.
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