*Takeshi Sagiya¹ (1.Disaster Mitigation Research Center, Nagoya University)

*Katsuhiko Suzuki^1,2, Yoshihiro Furukawa², Yoshio Takahashi³, Atsuyuki Ohta⁴, Teruyuki Maruoka⁵, Timothy J Fagan⁶, Qiang Wang⁷, Riko Iizuka-Oku⁸ (1.Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology, 2.Graduate Schoool of Science, Tohoku University, 3.Department of Earth and Planetary Sciences, Graduate Schoool of Science, The University of Tokyo, 4.Geological Survey of Japan, National Institute of Advanced Industrial Science, 5.Faculty of Life and Environmental Sciences, University of Tsukuba, 6.School of Education, Waseda University, 7.Guangzhou Insititute of Geochemistry, Chinese Academy of Science, 8.Geochemical Research Center, Graduate Schoool of Science, The University of Tokyo)

*Takato Takemura¹, Kazuhiro Onuma², Sakae Mukoyama³, Isao Shiozaki⁴ (1.Nihon University, 2.Tohoku University, 3.Kokusai Kogyo Co., Ltd. , 4.Engineering Advancement Association of Japan)

*Yusaku Ohta¹, Yusuke Yokota² (1. Editor-in-Chief of Journal of the Geodetic Society of Japan, 2.Chairman of Data Working Group in the Geodetic Society of Japan )

*Hiroaki Somura¹, Junichiro Ide¹, Shinichiro Nakamura¹, Atsushi Higuchi¹ (1.Committee on Editorial and Publication Affairs, JSHWR)