According to the Japan Meteorological Agency, volcanic earthquakes have been increasing since 2:00 pm on the 23rd at Mt. Ontake on the prefectural border between Nagano and Gifu.

In addition, the inclinometer installed near the top of the mountain showed a change in the uplift on the south side.

The Japan Meteorological Agency has issued an eruption alert level 2 crater area warning on Mt. Ontake, saying that a small-scale eruption may occur in the future, and is calling for caution against volcanic stones associated with the eruption within approximately 1 km from the crater. ..