[SCG63-P05] Cause of the horizontal deformation of the Philippine Sea plate subducting beneath southwestern Japan
Keywords:Philippine Sea Plate, Pacific Plate
First, we confirm that the observed eastern limit of the Philippine Sea plate beneath Kanto can be well reproduced with the subduction of the Philippine Sea plate onto the Pacific plate at dip angles of 12º down to a depth of 40 km and 40º at greater depths. Next, we apply the method that can expand a deformed plane surface to an undeformed geometry using lattice points assigned on the subducted Philippine Sea plate. Based on the two analyses, we conclude that the deformation of Philippine Sea plate is controlled by the shape of Pacific plate.