Regarding Mt. Ontake on the prefectural border between Nagano and Gifu, the Japan Meteorological Agency said that the possibility of an eruption affecting the area around the crater was low, and on the 23rd, the warning around the crater was canceled for the first time in 4 months, and the eruption alert level was set to " Reduced from "2" to "1".
The Japan Meteorological Agency continues to call for safety measures such as bringing a helmet when climbing a mountain.
At Mt. Mitake, where the worst volcanic disaster after the war occurred, with 63 dead and missing in the 2014 eruption, volcanic activity increased on February 23, including an increase in volcanic earthquakes. Along with announcing the crater area warning, the eruption alert level was raised from "1" to "2", which indicates access restrictions around the crater.
After that, the number of volcanic earthquakes gradually decreased, and volcanic tremors, which are said to indicate the movement of underground hydrothermal fluid and magma, have not been observed since March 19.
From these facts, the Japan Meteorological Agency said that the possibility of an eruption affecting a range of about 1 km from the crater was reduced, and at 2:00 pm on the 23rd, the warning around the crater was canceled and the eruption alert level was set to "active volcano". Reduced to "1" to indicate "note that there is".
The Japan Meteorological Agency continues to call for safety measures such as bringing a helmet when climbing a mountain, in accordance with the entry restrictions of local governments, as there is a risk of sudden eruption of volcanic ash inside the crater.