[S-VC40] Volcanic eruption dynamics and mechanisms: controlling physical and chemical processes

Wed. May 27, 2026 3:30 PM - 5:00 PM International Conference Room (IC) (International Conference Hall, Makuhari Messe)

Chairperson:Matsumoto Keiko(Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology), Tsunematsu Kae(Yamagata University), Park Jong Gil(Rice University)

Volcanic eruptions encompass multiple interrelated phenomena, from magma accumulation at depth to vesiculation and crystallization during magma ascent in volcanic conduits, culminating in the dispersion of volcanic products. Advancing from physical and chemical processes to mechanisms and ultimately to eruption dynamics is necessary for a comprehensive understanding of volcanic eruption. A broad range of approaches is required to elucidate these subjects. 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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3:30 PM - 3:45 PM

[SVC40-13] Protracted assembly of the magmas feeding the 1783-84 Laki fissure eruption, Iceland

★Invited Papers

*Euan Mutch^1,2, John Maclennan³, Margaret Hartley⁴ (1. Earth Observatory of Singapore, Nanyang Technological University, 2. Asian School of the Environment, Nanyang Technological University, 3. Department of Earth Sciences, University of Cambridge, 4. Department of Earth and Environmental Sciences, University of Manchester)

3:45 PM - 4:00 PM

[SVC40-14] Magma overpressure and depth estimates from partially exposed dykes

*Sirshendu Kumar Biswas^1,2, Tridib Kumar Mondal² (1. Hiroshima University, Graduate School of Advanced Science and Engineering, Earth and Planetary Systems Science Program, Kagamiyama 1-3-1, Higashi Hiroshima, Hiroshima 739-8526, Japan, 2. Geological Studies Unit, Indian Statistical Institute, Kolkata, 203 B.T. Road, Kolkata - 700108, West Bengal, India)

4:00 PM - 4:15 PM

[SVC40-15] Regional sensitivity analysis of a conduit flow model for andesitic lava effusion

*Akito Tsuchiya¹, Tomofumi Kozono², Satoshi Okumura³ (1. Department of Geophysics, Graduate School of Science, Tohoku University, 2. National Research Institute for Earth Science and Disaster Resilience, 3. Department of Earth Science, Graduate School of Science, Tohoku University)

4:15 PM - 4:30 PM

[SVC40-16] Reconstructing Fragmentation and Eruptive Variability from Proximal Ash Deposits at Mount Bromo, Indonesia

*Aisyah Qurrataaini¹, Tsukasa Ohba¹, Jananda Nuralam Indriyanto², Takashi Hoshide¹ (1. Akita University, 2. Institut Teknologi Bandung)

4:30 PM - 4:45 PM

[SVC40-17] Analysis of the effective density of volcanic ash and ashfall process at Sakurajima volcano using an optical disdrometer

*Takato Ono¹, Yoshiyuki Yasuike¹, Kuniaki Nishiki¹ (1. Nuclear Regulation Authority)

4:45 PM - 5:00 PM

[SVC40-18] A machine-learning identification method on the quantification of volcanic ash materials: application to temporal changes in ash composition of Sakurajima

*Nobuo Geshi¹, Ayumu Miyakawa², Keiko Matsumoto² (1. Earth and Planetary Science, Faculty of Science, Kyushu University, 2. Geological Survey of Japan, AIST)

Session information