Kuo Hsuan Tseng¹, *Yasuo Ogawa¹, Nurhasan Nurhasan¹, Sabri Bülent Tank¹, Yoshimori Honkura¹, Naoto Ujihara¹, Akihiko Terada¹, Yoshiya Usui¹, Wataru Kanda¹ (1.Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology)

*Marceau Gresse¹, Takao Koyama¹, Makoto Ueshima¹, Yuichi Morita¹, Yoichi Sasai², Jacques Zlotnicki³, Tsuneo Ishido⁴, Hideaki Hase⁵, Wataru Kanda⁶, Koki Aizawa⁷, Derek Weller¹, Tawat Rung-Arunwan⁸, Yasuo Matsunaga⁶, Hideki Ueda⁹, Maki Hata¹, Yusuke Yamaya¹⁰ (1.Earthquake Research Institute, The University of Tokyo, Tokyo, Japan, 2.Earthquake Prediction Research Centre, Tokai University, Shizuoka, Japan, 3.CNRS, OPGC-UMR6524, Aubière, France, 4.Geological Survey of Japan, AIST, Tsukuba Ibaraki, Japan, 5.Geothermal Energy Research & Development Co., Ltd., Tokyo, Japan, 6.Tokyo Institute of Technology School of Science, Tokyo, Japan, 7.Institute of Seismology and Volcanology, Faculty of Science, Kyushu University, Fukuoka, Japan, 8.Curl-E Geophysics Co., Ltd., Thailand, 9.National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan, 10.Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Fukushima, Japan)

*Yasuo Matsunaga¹, Wataru Kanda², Shinichi Takakura³, Takao Koyama⁴, Tatsuji Nishizawa² (1.Department of Earth and Planetary Sciences, School of Science, Tokyo Institute of Technology, 2.Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology, 3.National Institute of Advanced Industrial Science and Technology, 4.Earthquake Research Institute, University of Tokyo)

*Wataru Kanda¹, Mitsuru Utsugi², Hiroyuki Inoue², Shogo Komori³, Tsuneomi Kagiyama⁴ (1.Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology, 2.Aso Volcanological Laboratory, Graduate School of Science, Kyoto University, 3.National Institute of Advanced Industrial Science and Technology (AIST), 4.Aso Geopark Promotion Council)

*Koki Aizawa¹, Kazunari Uchida¹, Yuko Tsukashima¹, Keigo Kitamura³, Yasuhiro Fujimitsu², Mitsuru Utsugi⁴, Taro Shiotani, Hiroyuki Inoue⁴, Wataru Kanda⁵, Takao Koyama⁶, Makoto Uyeshima⁶, Ryokei Yoshimura⁷, Ken'ichi Yamazaki⁷, Shintaro Komatsu⁷, Shinichi Takakura⁹, Nobuo Matsushima⁹, Haruhiro Inagaki⁸, Hiroki Saito⁸, Yuki Fujii⁸ (1.Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University, 2.Department of Earth Resources Engineering Faculty of Engineering, 3.International Institute for Carbon-Neutral Energy Research (I2CNER), 4.Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University, 5.Volcanic Fluid Research Center, Tokyo Institute of Technology, 6.Earthquake Research Institute, University of Tokyo, 7.Disaster Prevention Research Institute, Kyoto University, 8.West Japan Engineering Consultants, Inc., 9.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)