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Ontake-san volcano
complex volcano 3063 m / 10,049 ft
Honshu, Japan, 35.89°N / 137.48°E
Current status: normal or dormant (1 out of 5) Ontake-san volcano eruptions:
27 Sep 2014, 2007, 1979-80, 774 AD
Typical eruption style:
explosive

Ontake-san volcano news & activity updates:

Ontake-san volcano (Japan): large explosion kills at least 1 person, several injured

Sat, 27 Sep 2014, 20:59
20:59 PM | BY: T
Pyroclastic flow during Ontake volcano's eruption today (Asahi.com)
Pyroclastic flow during Ontake volcano's eruption today (Asahi.com)
A large explosive eruption occurred at Japan's second highest volcano today at 11:56 local time. An explosion produced an ash plume that rose approx. 4 km and a large pyroclastic flow that swept down the southwestern flank.
At least one woman was killed by the eruption and several others, approx. 50 persons, were severely injured. The volcano is a popular hiking destination and at the time of the eruption, about 150-200 people were on the volcano.
A temple near the summit area was also strongly affected by the eruption.
Most likely, the eruption was phreatic in nature, i.e. caused by overheated ground water that suddenly exploded into steam and pulverized large amounts of rocks in the conduit.
The last known (and first historic) magmatic eruption on the volcano was between Oct 1979 and April 1980. Small phreatic explosions occurred in 2007.
Impressive video from the eruption (Asahi)
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