2:30 PM - 2:45 PM
★ [SCG61-08] Water flux model around TRIES/MIU to explain the gravity change
Keywords:Gravity, Ground water, Ground water flux
The interspaces of these stations are 1 to 2 km. The coseismic gravity decrease in these stations were about 10 micro gals which suggest that the mass moved away from these three stations equivalently. Based on former researches of geology and hydraulic geology, which clarified the permeable and impermeable layers well, we reached the model as follows for the coseismic case. 1) The subsurface structure is constructed by three permeable and two impermeable layers 2) The seismic wave or stress propagation causes the high permeable path through the deeper impermeable layer. 2) The water reserved in the middle reservoir flows down to the bottom reservoir driven by gravity force. Geologic fault plays an impermeable role for a lateral flow, however, the high permeable region are generated by the seismic event, along fault plane.