*Olga Girina¹、Dmitry Melnikov¹、Alexander Manevich¹、Anton Nuzhdaev¹、Elena Petrova² (1.Institute of Volcanology and Seismology, Far East Division, Russian Academy of Sciences、2.Lomonosov Moscow State University, Geography Faculty, Russia)

*ELENA PETROVA¹、Hajime Matsushima²、Anastasia Petrova³、Yury Semenov⁴ (1.Lomonosov Moscow State University, Faculty of Geography、2.Hokkaido University、3.Institute of Oriental Sudies of the Russian Academy of Sciences、4.Sochava Institute of Geography, Siberian Branch of the Russian Academy of Sciences)