*Urumu Tsunogai¹, Ryo Shingubara¹, Masanori Ito¹, Fumiko Nakagawa¹, Shin Yoshikawa², Mitsuru Utsugi², Akihiko Yokoo² (1.Graduate School of Environmental Studies, Nagoya University, 2.Graduate School of Science, Kyoto University)

*Takeshi Ohba¹, Muga Yaguchi², Nozomi Numanami¹, Yoichi Sasai³, Maria C L Barairo⁴, Paul Alanis⁴, Ma. Antonia V Bornas⁴, Shigekazu Kusumoto⁵, Toshiyasu Nagao³, Urumu Tsunogai⁶, Masanori Ito⁶, Ryo Shingubara⁶ (1.Dep. Chem. School Sci. Tokai Univ., Japan, 2.Meteorol. Res. Inst., Japan, 3.Inst. Oceanic Res. Development, Tokai Univ., Japan, 4.Philippine Inst. Volcanol. Seismol., Philippine, 5.Grad. School of Sci. Engineering Res. Univ. Toyama, Japan, 6.Grad. School of Envir. Studies Nagoya University, Japan)