Japan Geoscience Union Meeting 2018

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[JJ] Oral

S (Solid Earth Sciences) » S-VC Volcanology

[S-VC41] Active Volcanism

Tue. May 22, 2018 10:45 AM - 12:15 PM Convention Hall A (CH-A) (2F International Conference Hall, Makuhari Messe)

convener:Yuta Maeda(Nagoya University), Takahiro Miwa(National research institute for earth science and disaster prevention), Yosuke Aoki(東京大学地震研究所, 共同), Takeshi Nishimura(Department of Geophysics, Graduate School of Science, Tohoku University), Takahiro Ohkura(Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University), Satoshi Okumura(Division of Earth and Planetary Materials Science, Department of Earth Science, Graduate School of Science, Tohoku University), Tomofumi Kozono(Department of Geophysics, Graduate School of Science, Tohoku University), Chairperson:Nanjyo Kazuyoshi(University of Shizuoka), Kumagai Hiroyuki

10:45 AM - 11:00 AM

[SVC41-19] Seismic activity of Mt. Ontake volcano by multipoint observation test data at summit

*Yoshiko Yamanaka1, Yuta Maeda1, Toshiko Terakawa1, Shinichiro Horikawa1 (1.Graduate School of Encironmental Studies, University of NAGOYA)

Keywords:Mt. Ontake, Seismic activity, Near-field observation

We developed a portable seismic telemetry system. This system is compact size, and the consumption electricity is small (Horikawa et al., 2017VSJ). From October 2017 performance test of this system has been carried out in the summit region of Mt. Ontake volcano. 10 seismic observations were installed, but the data of 5 observations are not usable from various trouble. 5 observations are operating now.

Hypocenter determination for earthquakes occurred around Mt. Ontake volcano is made by using the performance test data and the seismic networks of Nagoya University and Japan Meteorological Agency. The number of determined earthquakes was approximately 170 in three months from November, 2017 to January, 2018. Most of earthquakes were located near the craters of the 2014 eruption, and those depths were close in sea level or were shallower.