*Mitsuhiro Nakagawa¹, Yasuo Miyabuchi², Takeshi Hasegawa³, Ryuta FURUKAWA⁴, Shimpei Uesawa⁵, Masashi NAGAI⁶ (1.Department of Natural History of Science, Faculty of Science, Hokkaido University, 2.Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, 3.Department of Earth Sciences, College of Science, Ibaraki University, 4.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 5.Central Research Institute of Electric Power Industry, 6.Volcano Research Department, National Research Institute for Earth Science and Disaster Resilience)

*Yasuo Miyabuchi¹, Eiichi Sato² (1.Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, 2.Meteorological Research Institute)