*Kazuhiro Somei¹, Takaaki Ikeda², Toshimitsu Nishimura¹, Ken Miyakoshi¹ (1.Geo-Research Institute, 2.Nagaoka University of Technology)

*Yifei Chen¹, Hiroe Miyake² (1.GSII, The University of Tokyo, 2.III, The University of Tokyo)

*Jin-Oh Park¹, Tetsuro Tsuru², Jih-Hsin Chang³, Chiori Tamura¹, Takanori Kagoshima¹, Shirai Kotaro¹, Kentaro Tanaka¹, Teresa Escobar¹, Yuji Sano¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Tokyo University of Marine Science and Technology, 3.Institute of Oceanography, National Taiwan University)

*Hitoshi Nakai¹ (1.Kobuchisawa Research Institute for Nature and Education)

*Kai Ito¹, Takashi Ito¹ (1.Ibaraki University)

*Kazuyuki Nakagawa¹ (1.Commentator ,Jiji Press)

*Hiroki Azuma¹, Shohei Naito¹, Hiroyuki Fujiwara¹, Shingo Kuroda², Saburou Midorikawa³ (1.National Research Institute for Earth Science and Disaster Resilience, 2.Hakusan Corporation, 3.Tokyo Institute of Technology)

*Wataru Tanikawa¹, Uramoto Go-Ichiro³, Shoichiro Uchiyama², Arata Orinaka³, Tadashi Yamashina³, Keisuke Okamoto⁴, Tadashi Hara³ (1.Japan Agency for Marine-Earth Science and Technology, Kochi Instutute for Core Sample Research, 2.National Research Institute for Earth Science and Disaster Prevention, 3.Kochi University, 4.Kochi Prefectural Museum of History)

*Kazuyuki Nakagawa¹, Noriko Tsumura² (1.Commentator ,Jiji Press, 2.Chiba University)

*makoto kumagai^1,2, Yusuke Suzuki³, Hideyuki Itoh⁴, Hinako Suzuki⁵, Shinichi Sugimoto² (1.Graduate School of policy studies, Iwate prefectural University, 2.Sanriku Geopark Promotion Council, 3.Izu Peninsula Geopark Promotion Concil, 4.Faculty of policy studies, Iwate prefectural University, 5.National Research Institute for Earth Science and Disaster Resilience)