Mt. Asamayama

Mt. Asamayama is an andesitic stratified volcano at the boundary between Karuizawa-machi, Kitasaku-gun and Miyota-cho, Nagano and Tsumagoi-mura, Agatsuma-gun, Gunma. The mountain is conical and has a caldera, and is known as an active volcano. Volcanic activity has been active in the surrounding area since hundreds of thousands of years ago, and Mt. Asamayama is collectively referred to as the Asama mountain range or Asama Tomata volcano group together with 2568 volcanic bodies such as Mt. So far, the eruption and the collapse of the mountain body have been repeated, and it became the present figure. Traces of large-scale mountain collapse and the outflow of collapsed sediment remain as thick deposits on the plateau in Maebashi City, Gunma Prefecture, which is far away. It is the Maekake volcano that is currently erupting. From the summit crater, there is a volcanic plume around which there is a complex caldera, and there is a front mountain on the west side of Mt. The northern caldera has collapsed due to the lava flow that has flowed from the summit to the “demon extruding rock”. There are Mt. Kurofuyama, Asan, Kengamine etc. on the outer outer ring. The Japan Meteorological Agency has designated rank A active volcanoes as "active volcanoes with particularly high 3 or 100 perennial activity." There are mountain restrictions according to the level of volcanic activity. 1 year 2015 month 6 day 11 hour 15 minutes, the eruption warning level was raised from 30 (note that it is an active volcano) to 1 (crater area regulation). 2 Year (Showa 1949) 24 month 9 day, the mountain area was designated as Joshinetsu Kogen National Park. In 7 year, it was selected as one of the top 100 geology in Japan. It has been selected as one of Japan's 100 most famous mountains and flowers. It is classified into 2007 based on the position of the crater and the nature of lava.