A temporary increase in volcanic earthquakes at Kusatsu-Shirane volcano
At Mt.Shirane at Mt.Kusatsu-Shirane in Gunma Prefecture, volcanic tremors that are thought to indicate the movement of underground hot water and volcanic gas were observed on the 28th night, and volcanic earthquakes increased on the morning of 29th . The Japan Meteorological Agency has called for vigilance against large volcanic blocks associated with the eruption, approximately one kilometer from the Yugama crater, indicating that volcanic activity is considered to be increasing.
According to the Japan Meteorological Agency, volcanic earthquakes increased from around 10:00 pm on March 28 to 6:00 am on March 29 near the Yugama of Mt. Kusatsu-Shirane in Gunma Prefecture, and a total of 57 observations were made.
At around 11 pm on March 28, volcanic tremors, which are thought to indicate the movement of underground hot water and volcanic gas, were observed, and a slight change in the slope of the ground was observed with the tremors. is.
At present, the seismic activity has subsided, and the surveillance camera images show that there is no particular change in the vicinity of Yugama.
In the vicinity of Yugama, volcanic earthquakes have been slightly increasing since early September last year, and ground changes indicating expansion at shallow craters have been observed.
The Japan Meteorological Agency has called for continuation of the eruption caution level 2, which indicates "Regulations around the crater", and to be cautious of the large volcanic block associated with the eruption within a range of approximately 1 km from the crater. I am.