Akahoya eruption
| Akahoya eruption | |
|---|---|
| Volcano | Kikai Caldera |
| Date | Between 7165 and 7303 years cal BP |
| Type | Ultra-Plinian |
| Location | Kyūshū, Japan 30°47′20″N 130°18′29″E / 30.789°N 130.308°E |
| Volume | 332–457 km3 (80–110 cu mi) |
| VEI | 7 |
| Impact | One of only six confirmed eruptions of its size in the Holocene; dramatically changed vegetation in Southern Kyūshū and impacted on the Jōmon culture |
| Maps | |
Affected areas of the eruption | |
The Akahoya eruption or Kikai-Akahoya eruption was the strongest known volcanic eruption of the Kikai Caldera in Kyūshū, Japan occurring c. 5250 BCE. It ejected 332–457 km3 (80–110 cu mi) of volcanic material, giving it a Volcanic Explosivity Index of 7.