Japan’s Mount Aso, world’s largest strato-volcano stirs – alert level raised to 2

May 17, 2011KUMAMOTO, Japan — The Meteorological Agency on Monday raised the volcanic alert level for Mount Aso from 1 to 2, prompting local authorities in Kumamoto Prefecture to ban entry to areas within 1 km of the crater of Mount Naka, one of five peaks in the active volcano’s central cone group. The alert includes a warning for rocks ejected from Mount Naka in the off-limits areas. The move came after the mountain belched a small amount of volcanic ash Friday and experienced a small eruption Sunday. On Monday, a small eruption and a 500-meter-high column of volcanic smoke were observed at around 10 a.m. – Japanese Times
Mount Aso (阿蘇山, Aso-san?) is the largest active volcano in Japan, and is among the largest in the world. It stands in Aso Kujū National Park in Kumamoto Prefecture, on the island of Kyūshū. Its peak is 1592 m above sea level. Aso has one of the largest caldera in the world (25 km north-south and 18 km east-west). The caldera has a circumference of around 120 km (75 miles), although sources vary on the exact distance.
(c) ANN News 2011  – Video contribution by Flaijers
This entry was posted in Earth Changes, Earth Watch, High-risk potential hazard zone, Potential Earthchange hotspot, Seismic tremors, Volcano Watch. Bookmark the permalink.

6 Responses to Japan’s Mount Aso, world’s largest strato-volcano stirs – alert level raised to 2

  1. Flaijers says:

    Thank you Flajers….



  2. Logman says:

    This is bad. A few months ago I posted a comment about Japan’s latest volcanism with Kirishima erupting and I said it was entirely normal and that I’d wait to see if Aso started waking up before I believed activity was out of the ordinary.

    Sakurajima is very active right now, Kirishima has quietened down quite a bit and now Aso is stirring. Kyushu is heating up – and I live in the middle of all 3. 🙂


  3. Jens Skapski says:

    Interesting to see how many volcanoes in the world became active since Japan was hit by the quake! Interesting to see that the volcanoes in Honshu are still sleeping!


  4. aquarianunicorn says:

    Who knew that 1 9.0 eq can wake up almost all of the volcanoes?
    If I remeber correctly..3 volcanoes erupted right after the 3/11 jolt.
    I don’t remember hearing or reading volcanoes waking up after the Chile eq.
    I really wonder why…Is it the geography?

    Now I’m worried for the citizens there too…what effects would any of these volcanoes do after a full blown eruption?…the ash cloud mixing in with radiated air…wouldn’t that alter the elements in the atmosphere?


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