4:30 PM - 4:45 PM
○Koshun Yamaoka1, Masashi Watanabe1, Hiroki Miyamachi2, Takahiro Kunitomo1, Toshiki Watanabe1, Hiroshi Yakiwara2, Yuta Maeda1, Takeshi Tameguri3, Ryoya Ikuta4, Masato Iguchi3 (1.Graduate School of Environmental Studies, Nagoya University, Chikusa, Nagoya, Japan., 2.Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan., 3.Sakurajima Volcano Research Center , Kyoto University. Kagoshima, Japan., 4.Faculty of Science, Shizuoka University, Shizuoka, Japan.)