*Yoshiaki Ida1 (1.Advance Soft Co.)
Session information
[JJ] Poster
S (Solid Earth Sciences) » S-VC Volcanology
[S-VC51] [JJ] Reconsiderations on 1986-IzuOhshima eruption, learning new things from the past
Sun. May 21, 2017 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall HALL7)
convener:Kei Kurita(Earthquake Research Institute,University of Tokyo), Hidefumi Watanabe(Disaster Prevention Division, Tokyo Metropolitan Government)
1986 Izu-Ohshima eruption has revealed several significant problems, which disclosed unmatured state of volcanology at that moment. The most significant situation was that the eruption style as well as the eruption site shifted with time during the course of eruption episodes. The volcanologists were faced the social demands for immediate response towards the transient behavior. This eruption may be the first occasion where the volcanologists deeply recognized the importance of real-time monitoring of the eruption activity. Why the eruption sequence changed? How did the observations trace the shift and how was the prediction of the shift possible?, these problems are still unanswered today. In this 100 years Izu-Ohshima erupted repeatedly with the interval of 30-40 years. Already 30 years have passed since last eruption so that we could consider next eruption. In this session we plan reconsiderations on 1986Izu-Ohshima eruption based on state-of-the-art concept of volcanology. Particularly new results have appeared recently by the reanalysis of the old data of strain meters and seismometers as well as the reanalysis of the samples by recent techniques. These results have revealed new aspects of the eruption. We will combine these data with the unanswered problems in the session.
*Masato Koyama1, Yukio Hayakawa2 (1.CIREN, Shizuoka Univ., 2.Education, Gunma Univ.)
*Shin'ya Onizawa1 (1.Volcanology Research Department, Meteorological Research Institute, JMA)
*Morihisa Hamada1 (1.Department of Solid Earth Geochemistry, Japan Agency for Marine-Earth Science and Technology)
*Hidemi Ishibashi1, Ryoya Oida1, Tatsuro Chiba2, Natsumi Hokanishi3, ATSUSHI YASUDA3 (1.Faculty of Science, Shizuoka University, 2.ASIA AIR SURVEY CO., LTD., 3.Earthquake Research Institute, University of Tokyo)
*Hirochika Sumino1, Kohei Yamane2, Kaori Kawana1, Toshiya Mori3, Aya Shimizu4, Kenji Notsu5, Pedro Hernández6 (1.Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 2.Department of Integrated Science, College of Arts and Science, University of Tokyo, 3.Geochemical Research Center, Graduate School of Science, University of Tokyo, 4.Tokyo Metropolitan Industrial Technology Research Institute, 5.Center for Integrated Research and Education of Natural Hazards, Shizuoka University, 6.Instituto Volcanolo´gico de Canarias)
*Yoichi Sasai1 (1.Earthquake Prediction Research Center, Institute of Oceanic Research and Development, Tokai University)
*Hitoshi Yamasato1, Takayuki Sakai2, Kohichi Uhira2, Hidefumi Watanabe3 (1.Meteorological Research Institute, Japan Meteorological Agency, 2.Volcanology Division, Japan Meteorological Agency, 3.Disaster Prevention Division, Tokyo Metropolitan Government)
*Yoshinobu Tsuji1, Yosuke Kuroyanagi2, Takahiro Kinami3, Yuya Matsuoka4, Mutsumi Odagiri(Shiraishi)5, Masami Sato6, Yayoi Haga6, Fumihiko Imamura6 (1.Fukada Geological Institute, 2.Pacific Consultants Co. Ltd., 3.Kubiki Engineering Co. Ltd., 4.Tohoku Univ., 5.Hanamaki City Museum, 6.IRIDeS, Tohoku Univ.)