Mt. Asama eruption warning level “3” continued. Call for warning.
At Asamayama on the border between Nagano and Gunma, no new eruption has occurred since the small eruption on the night of the 7th, but the Japan Meteorological Agency may continue to have eruptions that affect the neighborhood of the area. As there is, we continue eruption warning level "3" and call for warning to large cinders in the range of 4km from the crater.
At Asamayama, it was confirmed that a small eruption occurred at the summit crater at 10:00 pm on the 7th, and that fumes rose more than 1,800 meters from the crater and that a large volcanic block flew about 200 meters from the crater.
So far, volcanic ash has been confirmed in Tsumagoi Village and Naganohara Town of Gunma Prefecture.
The Japan Meteorological Agency dispatches staff to the site to investigate in detail the area where volcanic ash fell and the state of eruptions.
Under the crater of Mt. Asama, a volcanic earthquake that lasted around 50 times a day last month has been decreasing to around 10 times a day since this month, and an eruption occurred on the 7th night. It means that.
Since then, volcanic earthquakes have begun to increase again 25 times by 10 am from the 8th, but no crustal movements indicating a new magma rise have been observed.
At Asama, there is a risk of eruptions affecting the area where people live in the future, and eruption warning level 3 will be maintained. Large volcanic blocks and pyroclastic flows associated with eruptions are approximately 4 km from the summit crater. Has been called to be vigilant.
In addition, in areas that are leeward even outside the warning range, there is a risk that small volcanic blocks will fall by the wind and the window glass may break due to the vibration of the air accompanying the eruption.
As for the toll road “Onitsushi Highway” connecting Tsumagoi Village in Gunma Prefecture and Karuizawa Town in Nagano Prefecture, the eruption warning level of Mt. Asama has been raised to “3”, and the section of about 8 km passing through 4 km from the crater is closed. However, the traffic was closed at 9 am on the 8th as safety was confirmed.