11:15 AM - 11:30 AM
*Riko Iizuka-Oku1, Hirochika Sumino2, Yoshio Takahashi3 (1.Department of Earth Sciences, School of Education, Waseda University, 2.Research Center for Advanced Science and Technology, The University of Tokyo, 3.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo)