*Kazuhiko Fujita¹ (1.Department of Physics and Earth Sciences, University of the Ryukyus)

*Wataru Sano¹, Kazuhiko Fujita², Shoko Hirabayashi¹, Yusuke Yokoyama³, Yosuke Miyairi³, Lauren Trent Toth⁴, Richard Aronson⁵, Hironobu Kan¹ (1.Graduational School of Integrated Sciences for Global Socienty, Kyushu University, 2.Faculty of science, University of Ryukyus, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, 4.U.S. Geological Survey, 5.Florida Institute of Technology)

*Shunichi Kinoshita¹, Azumi Kuroyanagi², Hiroshi Nishi², Osamu Sasaki², Kazuhiko Fujita³, Atsushi Suzuki⁴, Hodaka Kawahata⁵ (1.Tohoku University, Graduate School of Science, 2.The Tohoku University Museum, 3.University of the Ryukyus, 4.Geological Survey of Japan National Institute of Advanced Industrial Science and Technology, 5.the University of Tokyo)

*Laurie Charrieau¹, Takashi Toyofuku¹, Yukiko Nagai¹, Katsunori Kimoto², Kazuhiko Fujita³ (1.X-STAR, JAMSTEC, 2.RIGC, JAMSTEC, 3.Department of Physics and Earth Sciences, University of the Ryukyus)

*Riho Tomatsu¹, Marc Humblet¹, Kazuhiko Fujita², Yui Kouketsu¹, Yasufumi Iryu³ (1.Graduate School of Environmental Studies, Nagoya University, 2.Department of Physics and Earth Sciences, University of the Ryukyus, 3.Institute of Geology and Paleontology Graduate School of Science Tohoku University)