[S-VC46] [EE] Transition mechanism of volcanic eruptions

Wed. May 24, 2017 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall HALL7)

convener:Takeshi Nishimura(Department of Geophysics, Graduate School of Science, Tohoku 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)

Sudden temporal changes recognized in volcanic and eruptive activities such as eruptions from lava dome to explosion, from summit to flank eruptions, and from phreatic to magmatic eruptions are ones of the most important targets in volcanology. The transitions can be related to complex behaviors of multi-phase magma flow in the volcanic conduit and interactions between magma and volcanic edifice, and are now intensively investigated from geophysical monitoring data and geological sample analyses as well as conduit flow modeling. This session aims to gather geophysical and material science data as well as theoretical modeling and discuss how we can understand the transition mechanisms in the volcanic activities from combinations of multidisciplinary results and forecast eruption sequence.

[SVC46-P01] Conduit flow dynamics during high-flux lava effusion events at Sakurajima volcano, Japan

*Tomofumi Kozono¹ (1.Department of Geophysics, Graduate School of Science, Tohoku University)

[SVC46-P02] Lava effusion modeling by a conduit flow model coupled with the brittle-ductile transition of magma

*Satoshi Okumura¹, Tomofumi Kozono² (1.Division of Earth and Planetary Materials Science, Department of Earth Science, Graduate School of Science, Tohoku University, 2.Department of Geophysics, Graduate School of Science, Tohoku University)

[SVC46-P03] Exsolution and dissolution of CHO fluids upon isobaric magma mixing

*Misako Nakao¹, Michihiko Nakamura¹ (1.Tohoku University)

[SVC46-P04] Estimation of the re-equilibrium depths of the Sakurajima vulcanian eruption magma from 2010 to 2015

*Sakauchi Nono¹, Michihiko Nakamura¹, ATSUSHI YASUDA², Satoshi Okumura¹, Nobuo Geshi³ (1.Department of Earth Science, Graduate School of Science, Tohoku University, 2.Earthquake Research Institute University of Tokyo, 3.Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology)

[SVC46-P05] Textural relaxation and permeability evolution of bubble-bearing magmas

*Shizuka Otsuki¹, Nobuo Geshi¹, Satoshi Okumura², Michihiko Nakamura², Osamu Sasaki³ (1. Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, Advanced Industrial Science and Technology, 2.Division of Earth and Planetary Materials Science, Department of Earth Science, Graduate Schoolof Science, Tohoku University, 3.The Tohoku University Museum)

[SVC46-P06] The rapid increase of SO₂ emission rate observed in the Aso volcano before an explosive eruption on October 8, 2016.

*Mori Takehiko¹, Toshiya Mori², Fukuoka Regional Headquarters Japan Meteorological Agency (1. Meteorological Research Institute, Japan Meteorological Agency, 2.Laboratory for Earthquake Chemistry, Graduate School of Science, the University of Tokyo)

[SVC46-P07] Ground deformation preceding to the explosive eruption eruptions of Aso Volcano,
Japan, October 8, 2016.

*Takahiro Ohkura¹, Shin Yoshikawa¹, Hiroyuki Inoue¹ (1.Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University)

[SVC46-P08] Hypocenters of earthquakes associated with rapid magma intrusion into Sakurajima volcano in August 2015 - Estimation by the amplitude source location method -

*Haruhisa Nakamichi¹, Masato Iguchi¹, Takeshi Tameguri¹ (1.Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University)

[SVC46-P09] Intense Swarm Activity in the Vicinity of the Sakurajima Volcano, Kyushu, Japan, in August 2015, detected by the Matched Filter Method.

*Shiro Ohmi¹, Masato Iguchi², Takeshi Tameguri², Haruhisa Nakamichi² (1.Earthquake Hazards Division, Disaster Prevention Research Institute, Kyoto University, 2.Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University)

[SVC46-P10] Seismic analyses of Vulcanian eruption at Sakurajima volcano: Spectral ratio analyses of explosion and Volcano-tectonic earthquakes

*Mohammad Hasib¹, Takeshi Nishimura¹ (1.Department of Geophysics, Graduate School of Science, Tohoku University)

[SVC46-P11] Triggering of volcanic eruptions: stress transfer by large earthquakes

*Takeshi Nishimura¹ (1.Department of Geophysics, Graduate School of Science, Tohoku University)

Session information