*Hiroaki Koge¹, Taichi Sato¹, Jun Arimoto¹, Makoto Otsubo¹, Saki Ishino¹, Yoshiaki Suzuki¹, Osamu Ishizuka¹, Takahiko Inoue¹, Mikiya Yamashita¹, Seishiro Furuyama², Yuka Yokoyama³, Hiroki Minami⁴, Chiori Tamura⁵ (1.Geological Survey of Japan, AIST, 2.Tokyo University of Marine Science and Technology, 3.Tokai University, 4.Japan Coast Guard, 5.Atmosphere and Ocean Research Institute, The University of Tokyo)

*Yoshiaki Suzuki¹, Takuya Itaki¹, Hajime Katayama¹, Naotomo Kaneko¹, Naoki Saito¹, Yumiko Harigane¹, Osamu Ishizuka¹, Koji Seike¹, Scientists of GB21-1/2/3/GB22-1/2/KH-22-2/KH-23-1 cruises (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

*Kenichiro Tani¹, Takashi Sano¹, Osamu Ishizuka², Teruki Oikawa², Yoshiaki Suzuki², Hajime Katayama², Hiroki Minami³, Masashi NAGAI⁴, Taketo Shimano⁵, Michihiko Nakamura⁶, Taisei Ukita⁶, Fukashi Maeno⁷, Tatsuki Mizuno⁷, Naoto Jimi⁸, Iona McIntosh⁹, Fumihiko Ikegami¹⁰ (1.National Museum of Nature and Science, 2.National Institute of Advanced Industrial Science and Technology, 3.Japan Coast Guard, 4.National Research Institute for Earth Science and Disaster Resilience, 5.Kagoshima University, 6.Tohoku University, 7.University of Tokyo, 8.Nagoya University, 9.Japan Agency for Marine-Earth Science and Technology, 10.University of Tasmania)

*Kenji Matsuzaki¹, Takuya Sagawa², Yoshiaki Suzuki³, Tomohisa Irino⁴, Ken Ikehara³, Shin-ichi Kamikuri⁵, Takuya Itaki³ (1.Atmosphere and Ocean Research Institute, The university of Tokyo, 2.Kanazawa University, 3.Geological Survey of Japan, 4.Hokkaido University, 5.Ibaraki University)