[S-VC43] Active Volcanism

Tue. May 26, 2026 9:00 AM - 10:30 AM Convention Hall (CH-A) (International Conference Hall, Makuhari Messe)

Chairperson:Yamakawa Kazuya(Mount Fuji Research Institute, Prefecture of Yamanashi), Hirose Takashi(Graduate School of Science, Tohoku University)

This session discusses various aspects of active volcanisms including, but not limited to, recent and historical eruptions, various phenomena associated with the volcanic activities, underground structures of the volcanoes, and developments of new instruments based on geophysical, geochemical, geological, and multidiscipline approaches. We also welcome studies on understanding and predicting the transitions of the eruptive activities from observational, theoretical, and experimental approaches.
This session is categorized as a J-session; however, slides and posters may be prepared in English, and presentations in English are also welcome.

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9:00 AM - 9:15 AM

[SVC43-01] Temporal changes in pre-eruptive Rayleigh wave dominance at Japanese volcanoes

*Takashi Hirose¹, Mie Ichihara², Yohei Yukutake², Takeshi Nishimura¹ (1. Graduate School of Science, Tohoku University, 2. Earthquake Research Institute, University of Tokyo)

9:15 AM - 9:30 AM

[SVC43-02] Flank instability of Mauna Loa Volcano, Hawai‘i, modulated by magma intrusion and eruption

*Mizuki Matsuda¹, Yosuke Aoki¹ (1. Earthquake Research Institute, The University of Tokyo)

9:30 AM - 9:45 AM

[SVC43-03] Magma degassing and fragmentation processes estimated from very-long-period events and tremor at Nevado del Ruiz volcano, Colombia

Yuki Hattori¹, *Hiroyuki Kumagai², Yuta Maeda², John Makario Londono³ (1. Leave from Graduate School of Environmental Studies, Nagoya University, 2. Graduate School of Environmental Studies, Nagoya University, 3. Colombia Geological Survey)

9:45 AM - 10:00 AM

[SVC43-04] Temporal frequency variation of volcanic long-period events at Kusatsu-Shirane Volcano and its relation to the hydrothermal system

*Azusa Mori¹, Akihiko Terada¹ (1. Institute of Integrated Research, Institute of Science Tokyo)

10:00 AM - 10:15 AM

[SVC43-05] Recent Seismic and Volcanic Activity in the southern Hida Mountain range, Central Japan

*Shiro Ohmi¹ (1. Disaster Prevention Research Institute, Kyoto University)

10:15 AM - 10:30 AM

[SVC43-06] Infrasound investigation of fumarolic activity at Iwodani, Kirishima volcano group

*Kazuya Yamakawa¹, Dan Muramatsu², Ayuta Tsuge³, Nataliya Galina⁴, Mie Ichihara³, Takeshi Matsushima⁴ (1. Mount Fuji Research Institute, Prefecture of Yamanashi, 2. Institute of Seismology and Volcanology, Faculty of Science, Hokkaido University, 3. Volcano Research Center, Earthquake Research Institute, The University of Tokyo, 4. Institute of Seismology and Volcanology, Faculty of Science, Kyushu University)

Session information