Ontake-san volcano news & activity updates:
Ontake-san volcano (Japan): death toll rises to at least 48
mercredi oct. 01, 2014 15:21 | AUTEUR : T
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.
It took more than 250 climbers on the mountain, a popular hiking destination, and a sacred place for Japan's religious worshipers, by surprise.
It is unclear whether this eruption is or not a precursor of a possible magmatic eruption in a near to medium future, i.e. caused by fresh magma coming to the surface. While search and rescue operations continue at high intensity, Japan's monitoring scientists are keeping an eye on possible changes that could indicate such a development. On the other hand, it is entirely possible, that the explosion remains a single event with no magmatic eruption following.
dimanche, sept. 28, 2014
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. ... [details]
samedi, sept. 27, 2014
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. ... [details]