Regarding Mt. Asama, situated on the border of Nagano and Gunma prefectures, the place the volcanic exercise was growing and the volcanic exercise was growing final month, the volcanic alert stage was raised to 2 final month. It is believed that magma is coming in.” He continued to call for vigilance within a range of about 2 kilometers from the crater.
The Japan Meteorological Agency announced the activity status of active volcanoes nationwide last month and points to be wary of.
Of these, Mt. Asama, located on the border of Nagano and Gunma, has seen tilt changes that indicate expansion on the west side of the mountain since around the 15th of last month, and GPS observations have confirmed a slight stretch in the ground.
In addition, volcanic earthquakes increased mainly in the shallow areas directly below the summit, with more than 100 earthquakes on many days after the 22nd. bottom.
In addition, the amount of fumaroles and volcanic gases emitted from the summit crater continues to be large each day, and the Japan Meteorological Agency has raised the volcanic alert level from “1” to “2”. We are calling for caution against large volcanic blocks and pyroclastic flows.
Volcanic activity has continued to increase this month, and the Japan Meteorological Agency said, “It seems that magma is slowly entering the magma chamber, which is said to be deep underground on the west side of the mountain. This may lead to an increase in earthquakes and fumaroles.”