Affiliation: | Department of Safety System Construction Engineering, Kagawa University, Takamatsu, Kagawa 761-0396, Japan,;Department of Earth Science, Faculty of Education, Saitama University, Saitama, Saitama 338-8570, Japan,;Department of Earth and Environmental Sciences, Kagoshima University, Kagoshima, Kagoshima 890-0065, Japan, and;Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan |