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Ontake-san volcano
complex volcano 3063 m / 10,049 ft
Honshu, Japan, 35.89°N / 137.48°E
Current status: restless (2 out of 5)
Ontake-san webcams / live data
Ontake-san volcano books
Ontake-san volcano eruptions:
27 Sep 2014, 2007, 1979-80, 774 AD
Typical eruption style:
explosive
Last earthquakes nearby
Latest satellite images
 

Ontake-san volcano news & activity updates:

Thu, 18 Dec 2014, 16:02
White steam plumes were observed during the past week. JMA reports seismic activity remained low, but maintains alert level 3, as sudden phreatic explosions could occur again.
Fri, 14 Nov 2014, 07:48
JMA reported that cloud cover often prevented visual observations of Ontakesan during 5-11 November; white plumes rose 200-300 m above the crater rim and drifted NE, E, and SE. ...more
Fri, 7 Nov 2014, 13:16
White plumes rose 100-300 m above the crater rim and drifted NE and SE during 29-30 October and 4 November. The Alert Level remained at 3 (on a scale of 1-5). ...more
Fri, 24 Oct 2014, 14:59
The volcano continues to produce white steam plumes rising a few 100 m above the crater. According to press articles, 7 people are still missing from the 27 Sep eruption, but search and rescue operations are being suspended until springtime because of the winterly conditions. The Alert Level remained at 3 (on a scale of 1-5).
Sat, 4 Oct 2014, 21:52
The volcano continues to emit plumes of steam and possibly some ash Tokyo VAAC reports. ...more
Wed, 1 Oct 2014, 15:21
The death toll from Saturday's powerful, and deadly explosion of the volcano has now climbed to 48, press reports. The eruption was a sudden, unexpected (and unpredictable) phreatic explosion, i.e. caused by sudden evaporation of overheated water in the hydrothermal system of the volcano. ...more [read all]
Sun, 28 Sep 2014, 06:52
In a screen grab from a YouTube video, hikers flee from Ontake on Saturday, Sept. 27, 2014, in Japan.
Yesterday's eruption might have caused more than 30 fatalities, Japanese press reports. Most of them were apparently killed by heart and respiratory failure after inhaling ash when caught in the outer areas of a pyroclastic flow or ash cloud descending the mountain. ...more [read all]
Sat, 27 Sep 2014, 20:59
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. ...more [read all]

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