[S-VC33] Mechanism of volcanic eruptions

Mon. May 26, 2025 9:00 AM - 10:30 AM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

convener:Mayumi Mujin(Hokkaido University), Ryo Tanaka(Hokkaido University,Institute of Seismology and Volcanology), Takafumi Maruishi(National Research Institute for Earth Science and Disaster Resilience ), Dan Muramatsu(Earthquake Reserch Institute, The University of Tokyo), Chairperson:Mayumi Mujin(Tohoku University), Dan Muramatsu(Earthquake Reserch Institute, The University of Tokyo), Masataka Kawaguchi(Earthquake Research Institute, the University of Tokyo), Keiko Matsumoto(Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology)

Multiple processes are involved in volcanic eruptions, including magma accumulation at depth, vesiculation and crystallization during magma ascent in volcanic conduits, and dispersion of volcanic products. We will discuss the mechanism of volcanic eruptions to elucidate these processes and understand volcanic eruption phenomena from an integrated view. We welcome contributions from geophysical and geochemical observations of active/quiet volcanoes, petrological/geochemical measurements of eruptive products, theoretical approaches, numerical simulations, laboratory experiments, and interdisciplinary studies that combine the above approaches.

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9:00 AM - 9:15 AM

[SVC33-01] Effects of nanometer scale chemical and structural heterogeneities in silicate melt on magma crystallization

*Kazuhisa Matsumoto¹, Satoshi Okumura¹, Jun Uzuhashi², Tadakatsu Ohkubo², Akira Miyake³ (1.Tohoku University , 2.National Institute for Materials and Science, 3.Kyoto University)

9:15 AM - 9:30 AM

[SVC33-02] Pre-eruption process of the Kyoho eruption (1716-1717) of Shinmoedake, Kirishima volcano-Multi-stage magma mixing and magma mingling

*Yuki Suzuki¹, HOKANISHI Natsumi², Fukashi Maeno², ATSUSHI YASUDA² (1.Department of Earth Sciences, Faculty of Education and Integrated Arts of Sciences, Waseda University, 2.Earthquake Research Institute, University of Tokyo)

9:30 AM - 9:45 AM

[SVC33-03] Petrological constraints on shallow conduit processes during fountain-collapse pyroclastic flows in the Asama 1783 eruption.

*Takuma Muraki¹, Michihiko Nakamura¹, Mayumi Mujin¹, Maya Yasui² (1.Department of Earth Science, Graduate school of science, Tohoku University, 2.Department of Earth and Environmental Sciences, College of Humanities and Sciences, Nihon University)

9:45 AM - 10:00 AM

[SVC33-04] Magma ascent rates during the 1914 sub-Plinian eruption of Sakurajima, Japan inferred from the glass embayment water contents

*Nobuo Geshi¹, Takahiro Miwa², Andrea Todde³ (1.Earth and Planetary Science, Faculty of Science, Kyushu University, 2.National Research Institute for Earth Science and Disaster Resilience, 3.Dipartimento di Scienze della Terra, Università di Pisa)

10:00 AM - 10:15 AM

[SVC33-05] Mechanism of Non-Eruptive Deflation (NED) events based on the analysis of volcanic ash at Sakurajima volcano, SW Japan

Nanami Homma¹, *Taketo Shimano¹, Atsushi Yasuda², Masato Iguchi³ (1.Graduate School of Science and Engineering, Kagoshima University, 2.Earthquake ResEarthquake Research Institute, University of Tokyo, 3.Kagoshima City)

10:15 AM - 10:30 AM

[SVC33-06] Thermal Evolution of Axisymmetric Isoviscous Gravity Currents: Implications for Thermal Monitoring of Lava Domes

*Takafumi Maruishi¹ (1.National Research Institute for Earth Science and Disaster Resilience )

Session information