*Kaori Aoki¹, Reona Hiramine², Daisuke Ishimura², Tomoki Sato³, Kenta Yoshida³, Qing Chang³, Tatsuki Watanabe², Takehiko Suzuki¹ (1.Research Center for Hazard Mitigation in Volcanic Islands and Urban Areas, Tokyo Metropolitan University, 2.Department of Geography, Tokyo Metropolitan University, 3.Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Research Institute for Marine Geodynamics (IMG), Volcanoes and Earth’s Interior Research Center (VERC))

*Daisuke Ishimura¹, Reona Hiramine¹ (1.Department of Geography, Tokyo Metropolitan University)