*Masashi Kamogawa¹, Toshiyasu Nagao² (1.Global Center for Asian and Regional Research, University of Shizuoka, 2.Institute of Oceanic Research and Development, Tokai 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)

*Yuichi S. Hayakawa¹, Shigekazu Kusumoto², Takuro Ogura^3,5, Toshiyasu Nagao⁴, Paul Karson B. Alanis⁶ (1.Faculty of Environmental Earth Science, Hokkaido University, Japan, 2.Graduate School of Science and Engineering for Research, University of Toyama, Japan, 3.Graduate School of Frontier Science, The University of Tokyo, Japan, 4.Institute of Oceanic Research and Development, Tokai University, Japan, 5.Graduate School of Environmental Science, Hokkaido University, Japan, 6.Philippine Institute of Volcanology and Seismology (PHIVOLCS), Department of Science and Technology, The Philippines)