Permalink : http://hdl.handle.net/2115/80697

JaLCDOI : 10.14943/gbhu.84.21

Seismic activity in Niseko volcano group was investigated using temporal and permanent seismic observation data. Three temporal seismic stations had been operated from November 2019 to October 2020. Location of precise hypocenters are calculated with optimum velocity structure estimated in this study. The number of earthquakes detected was 53, which is much larger than the JMA unified catalog. This indicates that there is existence of seismic activity in this region. Detected hypocenters distribute along the mountain ridge in west-east direction. In addition, relatively large earthquakes occur near Nitonupuri and Iwaonupuri volcano edifices. Temporal seismic observation around this volcanic region and its detailed analysis reveal the existence of local seismic activities.