Regarding the active seismic activity that continues in the Noto region of Ishikawa prefecture, the government's seismic investigation committee analyzed that "fluid" deep underground may be involved, and said, "A series of seismic activity will continue for the time being. "I can think of it."

At a regular meeting held on the 11th, the government's Earthquake Research Committee discussed mainly the earthquakes in the Noto region where seismic intensity 6 lower and 5 upper were observed in Suzu City, Ishikawa Prefecture last month.



As a result, from the analysis of observation data, he expressed the view that the "fluid" deep underground may be involved in this seismic activity and crustal movement.



Past seismic studies have shown that where there is "fluid" underground, it can infiltrate and affect surrounding rocks and faults, leading to increased seismic activity.



However, this time, the relationship between fluid and seismic activity has not been identified.



Based on these analysis results and the fact that seismic activity is still active, the Earthquake Research Committee has put together a view that "a series of seismic activity is expected to continue for the time being."



Active faults have also been confirmed on the seafloor on the north side of the land on the Noto Peninsula, where earthquakes have repeatedly occurred, and it is pointed out that it is necessary to pay attention to tsunamis in the event of a large-scale earthquake.

Professor Emeritus Naoshi Hirata of the University of Tokyo, who is the chairman of the Earthquake Research Committee, said, "Earthquake activity continues for a long period of time, and the answer is often unclear. There are active faults in the vicinity, and in addition to earthquakes that are larger than the ones that have occurred so far, there is a possibility that a tsunami will occur in some cases, so please be aware of this and proceed with preparations. " ..