*Daniel Coulthard¹, Georg F Zellmer¹, Sebastien Jego², Akihiko Tomiya³ (1.Volcanic Risk Solutions, Massey University, Palmerston North, New Zealand, 2.Institut des Sciences de la Terre d'Orleans, Centre National de la Recherche Scientifique, Universite d'Orleans, Orleans, France, 3.Geological Survey of Japan, Advanced Institute of Science and Technology, Tsukuba, Japan)

*Raimundo Brahm¹, Georg F Zellmer¹, Takeshi Kuritani², Naoya Sakamoto³, Daniel Coulthard¹, Mitsuhiro Nakagawa², Eiichi Sato⁴, Hisayoshi Yurimoto³ (1.VRS, Massey Univ., 2.Grad. School of Sc., Hokkaido Univ., 3.IIL, CRI, Hokkaido Univ., 4.Hokkaido Univ. of Educ.)