[S-VC45] Active Volcanism

Thu. May 28, 2015 9:00 AM - 10:30 AM 304 (3F)

Convener:*Yosuke Aoki(Earthquake Research Institute, University of Tokyo), Chair:Takahiro Ohkura(Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University), Isoji MIYAGI(Institute of Geology and Geoinformation, Geological Survey of Japan, AIST)

This session discusses various phenomena associated with active volcanisms including, but not limited to, geophysical and geochemical observations, geology, historical eruptions, and development of modern instruments. Also we welcome contributions on the 2014 Ontake eruption.

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9:00 AM - 9:15 AM

[SVC45-04] Eruptive activities of Aso Volcano, 2014-1015

*Takahiro OHKURA¹, Mitsuru UTSUGI¹, Akihiko YOKOO¹, Shin YOSHIKAWA¹, Hiroyuki INOUE¹, Tsuneomi KAGIYAMA¹ (1.AVL, Kyoto Univ.)

9:15 AM - 9:30 AM

[SVC45-05] Preliminary report on sequence and deposits of the 2014-2015 eruption of Nakadake crater, Aso Volcano, Japan

*Yasuo MIYABUCHI¹, Nobuo GESHI², Akihiko YOKOO³ (1.Faculty of Education, Kumamoto University, 2.Geological Survey of Japan, AIST, 3.Graduate School of Science, Kyoto University)

9:30 AM - 9:45 AM

[SVC45-06] Temporal color variations of volcanic ashes from Aso Nakadake 2014-2015

*Isoji MIYAGI¹, Nobuo GESHI¹, Hideo HOSHIZUMI¹, Seiko YAMASAKI¹ (1.Geological Survey of Japan, AIST)

9:45 AM - 10:00 AM

[SVC45-07] Petrographic description of volcanic products from Aso Nakadake, November 2014 and later

*Toshiaki HASENAKA¹, Hiroshi ISOBE¹, Fumiko SUGIYAMA¹, Koki NAGATA², Yoshizumi NAGAMATSU³, Yasushi MORI⁴ (1.Graduate School of Science & Technology, Kumamoto University, 2.Aso Geopark Promotion Council, 3.Kita-ku, Kumamoto City, 4.Kitakyushu Museum of Natural History & Human History)

10:00 AM - 10:15 AM

[SVC45-08] Variation of volcanic gas composition during transition from crater lake activity to eruption at Aso volcano, Japan

*Hiroshi SHINOHARA¹, Nobuo GESHI¹, Akihiko YOKOO², Ryunosuke KAZAHAYA¹ (1.Geological Survey of Japan, AIST, 2.Graduate School of Science, Kyoto University)

10:15 AM - 10:30 AM

[SVC45-09] Step-wise temporal change in the frequency-amplitude distribution of volcanic long period tremors at Aso volcano

*Osamu SANDANBATA¹, Kazushige OBARA², Takuto MAEDA², Ryota TAKAGI², Kenji SATAKE² (1.Department of Earth and Planetary Science, University of Tokyo, 2.Earthquake Research Institute, The University of Tokyo)