[S-VC39] Submarine volcanism

2026年5月25日(月) 10:45 〜 12:15 301B (幕張メッセ国際会議場)

座長:前野深(東京大学地震研究所)、藤田英輔(防災科学技術研究所　火山防災研究部門)

Recent submarine eruptions in island arc settings, including those at Fukutoku-Oka-no-Ba, Sofu Seamount, and Hunga Tonga-Hunga Ha'apai, have drawn new attention to the proximal and distal hazards of submarine eruptions that include pumice rafts, tsunami activity, and destruction of seafloor infrastructure. Elsewhere, long-term detailed geochemical and geophysical observations of deep submarine mafic eruptions such as at Axial Seamount and Fani Maore (Mayotte) have enabled new insights connecting their eruption dynamics, magma plumbing systems, and tectonic context. These modern eruption observations add to the studies of submarine volcanic edifices that together are revealing the full history, causes and impacts of submarine eruptions, such as in the Ogasawara islands where volcanic edifices record the evolution of submarine volcanism from subduction initiation at 52 Ma to the present-day, and where the andesite eruptions of Nishinoshima are proposed to represent continental crust formation through submarine volcanism in thin arc crust. Comprehensive investigations are required not only to improve our ability to predict and mitigate submarine eruption hazards but also to elucidate the fundamental geological processes that control the occurrence and consequences of submarine volcanism. Considering the diversity of submarine volcanism across island arcs, mid-ocean ridges, hotspots, and large oceanic plateaus, we welcome active participation and contributions from researchers who are observing, analyzing, and modeling submarine volcanism.

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10:45 〜 11:00

[SVC39-06] Identification of Submarine Volcanic T-Wave Sources Based on Inter-Station Travel Time Differences

*大林政行¹、吉光淳子¹ (1. 独立行政法人海洋研究開発機構火山・地球内部研究センター)

11:00 〜 11:15

[SVC39-07] Source process of monochromatic tremor associated with submarine eruption in Ogasawara Ioto

*及川元己¹、高野智也¹、小園誠史¹、藤田英輔¹、廣瀬郁² (1. 国立研究開発法人防災科学技術研究所、2. 東北大学大学院理学研究科 )

11:15 〜 11:30

[SVC39-08] 2021年福徳岡ノ場海底火山噴火に伴う微小津波の検出

*舟山将司¹、綿田辰吾²、三反畑修²、工藤蒼生¹ (1. 東京大学理学系研究科地球惑星科学専攻、2. 東京大学地震研究所)

11:30 〜 11:45

[SVC39-09] 小笠原諸島は島弧火山か、プレート拡大軸上の中央海嶺か？

*田村芳彦¹、新井隆太¹、McIntosh Iona¹、石塚治²、小平秀一¹、高橋成実¹ (1. 海洋研究開発機構　海域地震火山部門、2. 産業技術総合研究所)

11:45 〜 12:00

[SVC39-10] Explosive submarine volcanism under ice sheets: discoveries in the western Ross Sea, Antarctica

*Masako Tominaga¹, Kurt Panter², Carole Berthod³, Cecile Prigent⁴, Marie Walter⁴, Jyun-Nai Wu¹, Florian Neumann⁵, Jonas Preine¹ (1. Department of Geology and Geophysics, Woods Hole Oceanographic Institution. Woods Hole, MA, USA , 2. School of Earth, Environment and Society Bowling Green State University, Bowling Green, OH, USA , 3. Observatoire volcanologique et sismologique de Guadeloupe, Institut de physique du globe de Paris, F-97113 Gourbeyre, France , 4. Université Paris-Cité, Institut de physique du globe de Paris, CNRS, UMR 7154, F-75005 Paris, France , 5. MARUM Center for Marine Environmental Sciences, University of Bremen, 28359 Bremen, Germany )

Discussion (12:00 〜 12:15)

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