Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Poster

S (Solid Earth Sciences) » S-VC Volcanology

[S-VC41] Active Volcanism

Wed. May 23, 2018 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall7, 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)

[SVC41-P14] Volcanic activity at Asama volcano from the past data

*Yoshihiro Otsuka1, Yoshiaki Imai1 (1.Seismology and Volcanology Department,JMA)

Keywords:Asama volcano, number of erthquakes, type of erthquake, height of volcanic fume (volcanic fume index)

Volcano observation started in Asama volcano from 1911. Among these, we investigated volcanic activity by observational data from 1965 to 1990. In this survey we used the number of earthquakes, the type of earthquake, the height of the volcanic fume (volcanic fume index), volcanic glow and sulfur dioxide emissions (Ohta et la., 1990).
According to it, the eruption of 1973 and the eruption of 1982-1983 were different (Figure1). It is thought that this is due to the difference of eruption style of the magma eruption and the phreatic steam eruption. These results were compared recently (since 2002) eruption case and we will discuss about.
Acknowledgement: We express great thanks Kyushu University to use the sulfur dioxide data of Asama volcano.