Akita-Komaga-take volcan éruptions
stratovolcans 1637 m / 5,371 ft
Honshu, Japon, 39.76°N / 140.8°E
Liste des éruptions: 1970-71: strombolian activity and lava flow
1932, 1902, 1890-91, 1100? (TC), 807 AD
Radiocarbon (RC) and Tephrochronology (TC) dated:
400 AD ± 500 (TC), 50 BC ± 200 (RC), 200 BC ± 200 (RC), 350 BC ± 200 (RC), 1450 BC ± 50 (RC), 5950 BC ± 200 (RC), 6150 BC ± 300 (RC), 6350 BC ± 200 (RC), 7100 BC ± 1000 (TC), 7850 BC ± 200 (RC), 8300 BC ± 300 (TC), 8800 BC ± 300 (TC)
Akita-Komaga-take volcano erupted from 18 September 1970 until 25 January. The eruption produced strombolian activity and lava flows from Medake cone in the southern caldera. It was the first eruption in 38 years and the first in historic times to produce lava flows.
A seismic swarm occurred at Komagatake volcano around 10 December 1962. 4 felt earthquakes up to magnitude 4 accompanied by subterranean rumbling at the northwestern foot of the mountain were recorded.
1932 July eruption
Akita-Komaga-take volcano erupted from 21-24 July 1932 from Ishibora crater 500 m south of Me-dake. Explosions formed 11 small craters on a 600 m long NE-SW fracture. Ash destroyed vegetation in up to 2 km distance on Mt. Yokodake at the eastern rim of the caldera. Light ash fall also occurred around the towns of Hashiba and Shizukuishi.
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