*Ayumi Kinjyo¹, Mamoru Nakamura¹, Youhei Kadoi¹ (1.Fauclty of Science, University of the Ryukyus)

*Mamoru Nakamura¹ (1.Faculty of Science, University of the Ryukyus)

*Masayuki Kano¹, Jun'ichi Fukuda¹, SHINICHI MIYAZAKI², Mamoru Nakamura³ (1.Earthquake Research Institute, the University of Tokyo, 2.Graduate School of Science, Kyoto University, 3.Faculty of Science, University of the Ryukyus)

*Ayumi Kinjyo¹, Mamoru Nakamura¹, Youhei Kadoi¹ (1.Fauclty of Science, University of the Ryukyus)

*Mamoru Nakamura¹ (1.Faculty of Science, University of the Ryukyus)

*Masayuki Kano¹, Jun'ichi Fukuda¹, SHINICHI MIYAZAKI², Mamoru Nakamura³ (1.Earthquake Research Institute, the University of Tokyo, 2.Graduate School of Science, Kyoto University, 3.Faculty of Science, University of the Ryukyus)

Takuma Oda¹, *Mamoru Nakamura¹ (1.Faculty of Science, University of the Ryukyus)

Takuma Oda¹, *Mamoru Nakamura¹ (1.Faculty of Science, University of the Ryukyus)

*Jennifer Aurelie Louise Weil-Accardo¹, Kenji Satake², Nathalie Feuillet³, Tomoko Goto², Hajime Kayanne⁴, Jean-Marie Saurel³, Noelynna Ramos⁵, Tomoya Harada², Kazuhisa Goto⁶, Sowa Kohki⁷, Mamoru Nakamura⁸ (1.Earth Observatory of Singapore, Nanyang Technological Institute, 2.Earthquake Research Institute, University of Tokyo, 3.Institut de Physique du Globe de Paris, 4.Department of Earth and Planetary Environmental Science, School of Science, University of Tokyo, 5.National Institute of Geological Sciences, University of the Philippines, 6.International Research Institute of Disaster Science, Tohoku University, 7.Geochemical Laboratory, Department of Chemistry, Toho University , 8.Faculty of Science, University of the Ryukyus)

*Masaya Sokei¹, Mamoru Nakamura², How-Wei Chen³ (1.University of the Ryukyus Graduate school of Engineering and Science, 2.University of the Ryukyus Faculity of Science, 3.Institute of Geophysics National Central Univ., Taiwan)

*Masaya Sokei¹, Mamoru Nakamura², How-Wei Chen³ (1.University of the Ryukyus Graduate school of Engineering and Science, 2.University of the Ryukyus Faculity of Science, 3.Institute of Geophysics National Central Univ., Taiwan)