*Shota Watanabe¹, Takeshi Hasegawa¹, Teruki Oikawa², Nobuo Geshi² (1.Graduate School of Science and Engineering, Ibaraki University, 2.Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology)

*Tomohiro Tano¹, Takehiko Suzuki^1,2, Daisuke Ishimura^1,2, Satoshi Terayama¹, Tatsuki Watanabe¹ (1.Department of Geography, Tokyo Metropolitan University , 2.Research Center for Volcanic Hazards and Their Mitigation,Tokyo Metropolitan University )

*Teruki Oikawa¹, Shun Nakano¹ (1.GSJ, National Institute of Advanced Industrial Science and Technology )

*Tsutomu Honda¹ (1.Vulcano-speleological Society)

*Ryohei Kikuchi¹, Katsuya Kaneko¹ (1.Department of Planetology, Graduate School of Science, Kobe University)

*Takeshi Hanyu¹, Nobukazu Seama^2,3, Satoru Tanaka¹, Yoshiyuki Tatsumi^3,2, Shunsuke Abe², Morihisa Hamada¹, Tomoko Hanyu³, Hikaru Iwamaru³, Souko Kado², Katsuya Kaneko^2,3, Ryohei Kikuchi², Koji Kiyosugi³, Tetsuo Matsuno^3,2, Iona McIntosh¹, Takashi Miyazaki¹, Reina NAKAOKA³, Nobuyuki Okamoto³, Taiki Orii², Satoshi Shimizu³, Tsuyoshi Shintani⁴, Keiko Suzuki-Kamata^3,2, Maria Luisa Tejada¹, Kenta Ueki¹, Bogdan Stefanov Vaglarov¹ (1.Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamics, 2.Kobe University, Graduate School of Science, 3.Kobe University, Kobe Ocean Bottom Exploration Center, 4.Osaka City University, Graduate School of Science)

*Takeshi Tameguri¹, Hiroshi Yakiwara², Masato Iguchi¹, Tomoki Tsutsui¹ (1.Sakurajima Volcano Research Center,Disaster Prevention Research Institute, Kyoto University, 2.Nansei-toko Observatory for Earthquakes and Volcanoes, Kagoshima University)

*Akihiko Terada¹, Akira Katori¹, Muga Yaguchi², Mare Yamamoto³, Taishi Yamada⁴, Shin'ya Onizawa², Tatsuji Nishizawa¹, Hiroshi Aoyama⁵, Yuichi Morita⁷, Takeshi Ohba⁶ (1.Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology, 2.Meteorological Research Institute, JMA, 3.Graduate School of Science, Tohoku University, 4.Disaster Prevention Research Institute, Kyoto University, 5.Faculty of Science, Hokkaido University, 6.Department of chemistry, School of Science, Tokia University, 7.Earthquake Research Institute, University of Tokyo)

*Muga Yaguchi¹, Takeshi Ohba², Akihiko Terada³ (1.Volcanology Research Department, Meteorological Research Institute, Japan Meteorological Agency, 2.Department of Chemistry, School of Science, Tokai University, 3.Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology)

*Hirochika Sumino¹, Kotaro Toyama¹, Takeshi Ohba², Muga Yaguchi³, Akihiko Terada⁴ (1.Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 2.Department of Chemistry, School of Science, Tokai University, 3.Meteorological Research Institute, Japan Meteorological Agency, 4.Volcanic Fluid Research Center, Tokyo Institute of Technology)