Japan Geoscience Union Meeting 2015

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Oral

Symbol S (Solid Earth Sciences) » S-VC Volcanology

[S-VC48] Mitigation of Volcanic disaster - Basic and applied research

Sun. May 24, 2015 9:00 AM - 10:45 AM A05 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Kazutaka Mannen(Hot Springs Research Institute of Kanagawa Prefecture), Shinji Takarada(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Eisuke Fujita(National research Instituite for Earth science and Disaster prevention, Volcanic research department), Hisashi Sasaki(Asia Air Survey Co., Ltd.), Chair:Hisashi Sasaki(Asia Air Survey Co., Ltd.), Shinji Takarada(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

10:00 AM - 10:15 AM

[SVC48-05] A review of volcanic phenomena caused by phreatic eruption in Japan

*Hisashi SASAKI1, Shino NARUKE1, Hiroshi KISHIMOTO1, Kenichi ARAI1 (1.Asia Air Survey Co., Ltd.)

Keywords:phreatic eruption, ballistic projectiles, pyroclastic flow, mud flow, hazard map

We reviewed volcanic phenomena caused by phreatic eruption. Pyroclastic flow by phreatic eruption occurred in Tarumaesan 1978 eruption, Asozan 1979 eruption, Miyakejima 2000 eruption and Ontakesan 2014 eruption. Mud flow by phreatic eruption occurred in Yakedake 1915 eruption, Niigatayakeyama 1974 eruption, Meakandake 2006 eruption and Ontakesan 2014 eruption. Only 40% of maps of the phreatic eruption are made with the volcano hazard map in Japan. Ballistic projectiles, ash falls and debris flows are often displayed to a hazard map. It is a problem that a hazard map has few mentions of pyroclastic flow and the mud flow. We think that the revision such as volcano hazard map and disaster prevention plans is necessary.