An eruption occurred at Mt. Asama, an active complex volcano in central Honshū (the main island of Japan) around 22:08 on Wednesday, August 7. The volcanic plume seems to have reached over 1800m above the crater.
The Meteorological Agency raised the eruption alert level from 1 to 3 at 22:30. People are advised to be wary of large cinders and pyroclastic flows within 4km of the summit crater.
The possibility of eruptions affecting the vicinity of the residential area
1. Status of volcanic activity and forecast warnings
At Asamayama, a small eruption occurred at the summit crater at 22:08 today (7th).
In the future, it is expected that eruptions that may affect the vicinity of the residential area may occur.
2. In the following municipalities, etc. , beware of mountain entry restrictions around the crater
Gunma Prefecture: Tsumagoi Village
Nagano Prefecture: Komoro City, Karuizawa Town, Miyota Town
3. Precautions for disaster prevention, etc.
Be cautious of large cinders and pyroclastic flows scattered in a trajectory within a range of 4 km from the crater. Do not enter dangerous areas according to the instructions of the local government.
Please note that at the time of the eruption, not only volcanic ash but also small volcanic blocks are washed away on the leeward side.
Also, pay attention to debris flow during rainfall. (Please note that the window glass may break due to large air vibrations caused by the eruption.)