Hokkaido University, Department of Cosmosciences, Kita 10 Nishi 8, Kita-ku, Sapporo, 060- 0810, Japan ; Cyber University, Faculty of Information technology and Buisiness, 1-11, Kita- Yamabushi-cho, Shinjuku, Tokyo, 162-0853, Japan
Ehime University, Geodynamics Research Center, 2-5 Bunkyo-cho, Matsuyama, 790- 8577, Japan
Tokyo Institute of Technology, Department of Earth and Planet. Sciences, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
University of Minnesota, Department of Geology and Geophysics, 599 Walter Library 117 Pleasant Street SE, Minneapolis, MN 55455, United States
Tokyo Institute of Technology, Department of Earth and Planet. Sciences, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
St. John's University, PO Box 1713, Collegeville, MN 56321, United States