Fault structures in the focal area of the 2016 Kumamoto earthquake revealed by derivatives and structure parameters of a gravity gradient tensor

Yoshihiro Hiramatsu1, Nayuta Matsumoto2 and Akihiro Sawada2, (1)Kanazawa University, Graduate School of Natural Science and Technology, Kanazawa, Japan, (2)Kanazawa University, Kanazawa, Japan