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Akagi volcano

stratovolcano 1828 m / 5,997 ft
Honshu, Japan, 36.56°N / 139.2°E
Current status: dormant (1 out of 5)
Akagi volcano books
Typical eruption style: explosive
Akagi volcano eruptions: probably no recent eruptions
uncertain eruption reports in 1938 and 1251
TimeMag. / DepthDistanceLocation
Thu, 23 Mar
Thu, 23 Mar 11:00 UTCM 2.7 / 136.7 km15 kmTOCHIGI GUNMA BORDER
Sat, 11 Mar
Sat, 11 Mar 20:00 UTCM 2.5 / 6.8 km9 kmTOCHIGI GUNMA BORDER
Fri, 24 Feb
Fri, 24 Feb 01:36 UTCM 2.5 / 126.8 km41 kmSOUTHERN TOCHIGI PREF
Wed, 15 Feb
Wed, 15 Feb 05:23 UTCM 2.5 / 13.6 km19 kmSE GUNMA PREF
View all recent quakes
Akagi volcano is a broad stratovolcano located in central Honshu, 110 km NNW of Tokyo. It is part of the Akagi Prefectural Par.
The volcano contains a 3 x 4 km diameter summit caldera which contains lake Ono in the NE.
It is uncertain whether the volcano has erupted in the past 2000 years. Reports about possible activity in the 9th century, in 1251 and 1938 are considered unreliable.

Background:

from: Smithsonian / GVP volcano information

The broad, low dominantly andesitic Akagi volcano rises above the northern end of the Kanto Plain. It contains an elliptical, 3 x 4 km summit caldera with post-caldera lava domes arranged along a NW-SE line. Lake Ono is located at the NE end of the caldera. An older stratovolcano was partially destroyed by edifice collapse, producing a debris-avalanche deposit along the south flank. A series of large plinian eruptions accompanied growth of a second stratovolcano during the Pleistocene. Construction of the central cone in the late-Pleistocene summit caldera began following the last of the plinian eruptions about 31,000 years ago. During historical time unusual activity was recorded on several occasions during the 9th century, but reported eruptions in 1251 and 1938 are considered uncertain.


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