11:15 AM - 11:30 AM
Takuya ABIRU1, *Hidetoshi SHIBUYA2, Nobutatsu MOCHIZUKI3, Takanori YATO2, Yasuo MIYABUCHI4 (1.Faculty of Science, Kumamoto University, 2.Department of Earth and Environmental Sciences, Kumamoto University, 3.Priority Organization for Innovation and Excellence, Kumamoto University, 4.Faculty of Education, Kumamoto University)