[AHW24-P08] Surface displacement around the Kumamoto plain before and after the 2016 Kumamoto earthquake
Keywords:SAR interferometry, 2016 Kumamoto earthquake, the Kumamoto plain
As a result of the analysis, I estimated surface displacement of about 9 mm/year away from the satellite (possible subsidence) using PALSAR data (before the 2016 earthquake). Using the same data, I also estimated surface displacement toward the satellite (possible uplift) with the amount of 5 mm/year at the east part of the Kumamoto plain. On the other hand, using the data acquired at May 2016 and July 2016, I estimated surface displacement of about 25 mm away from the satellite (possible subsidence) at the intersection of the Hinagu and Futagawa fault systems. The amount of the displacement became smaller after the period. Because of the low spatial correlation with the fault systems, I inferred that the displacement after the earthquake correspond to groundwater migration due to the 2016 Kumamoto earthquake.