*Hiroyuki Takayama¹, Tetsuya Yamamoto¹, Shin'ya Onizawa¹ (1.Volcanological Division 1st labolatory, Meteorological Research Institute)

*Tetsuya Yamamoto¹, Hiroyuki Takayama¹, Shin'ya Onizawa¹, Akimichi Takagi¹ (1.Meteorological Research Institute, Japan Meteorological Agency)

*Shinya Nagato¹, Kouichi Uhira¹, Kouji Kato¹, Yuuko Sekiguchi¹ (1.Japan Meteorological Agency)

*tomozo Ono¹, Kenji Nogami², Izumi Sato¹, Taisei Morishita¹, Ichiro Fukuyama¹, Shinichi Yosioka¹, Keisuke Nakamura¹, Hiroyuki Yamano¹ (1.Hydrographic and Oceanographic Department, Japan Coast Guard, 2.Tokyo Institute of Technology)

*Izumi Sato¹, Tomozo Ono¹, Taisei Morishita¹, Shogo Hamasaki¹, Hitomi Takahashi¹, Kenji Nogami² (1.Hydrographic and Oceanographic Department, Japan Coast Guard, 2.Volcanic Fluid Research Center, Tokyo Institute of Technology)

*Nozomi Numanami¹, Ryo Miyazaki¹, Takeshi Ohba¹ (1.Department of Chemistry, School of Science, Tokai University)

Chizuru Totani¹, *Yuta Mitsui² (1.formerly at Faculty of Science, Shizuoka University, 2.Department of Geosciences, Shizuoka University)

*Minoru Takeo¹, Yuta Maeda², Ryunosuke KAZAHAYA³ (1.Earthquake Research Institute, University of Tokyo, 2.Nagoya University, 3.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

*Kyoka Ishii¹, Akihiko Yokoo¹, Tsuneomi Kagiyama¹, Takahiro Ohkura¹, Shin Yoshikawa¹, Hiroyuki Inoue¹ (1.Graduate School of Science, Kyoto University)

*Mare Yamamoto¹, Takahiro Ohkura², Satoshi Kaneshima³, Hitoshi Kawakatsu⁴ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate Shcool of Science, Kyoto University, 3.Department of Earth and Planetary Sciences, Kyusyu University, 4.Earthquake Research Institute, University of Tokyo)