Solid Earth Sciences (S)
Session Sub-category Complex & General(CG)
Session ID S-CG54
Title Volcanoes in the sea
Short Title Volcanoes in the sea
Main Convener Name Yoshihiko Tamura
Affiliation Research Institute for Marine Geodynamics, Japan Agency for Maine-Earth Science and Technology
Co-Convener 1 Name Eisuke Fujita
Affiliation National research Instituite for Earth science and Disaster Resilience, Volcanic research department
Co-Convener 2 Name Fukashi Maeno
Affiliation Earthquake Research Institute, University of Tokyo
Co-Convener 3 Name Shigeaki Ono
Affiliation Japan Agency for Marine-Earth Science and Technology
Session Language 
J
Scope 
The violent eruptions of Nishinoshima, Fukutoku-Oka-no-Ba, and Hunga Tonga-Hunga Haapai attracted public attention: the eyes of the world are upon volcanoes in the sea. These eruptions are, however, diverse, and unpredictable, and it is often difficult to prepare for such disasters to take effective measures. A comparison of the Japanese and international oceanic arc volcanoes may help to make comprehensive understandings of oceanic arc volcanoes, predict, and prepare possible future eruptions. Volcanoes in the sea include oceanic arcs, mid-ocean ridges, hot spots, and submarine large igneous provinces: we encourage presentations of geologists, geophysicists, petrologists, geochemists, who are involved in the studies of volcanoes in the sea.
Presentation Format Oral and Poster presentation
Invited Authors Osamu Ishizuka (Geological Survey of Japan, AIST)
Toshiya Fujiwara (Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology)
Kenichiro Tani (Department of Geology and Paleontology, National Museum of Nature and Science)
Shuichi Kodaira (Research Institute of Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology)
Masato Iguchi (Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University)
Time Presentation No Title Presenter
Oral Presentation May 31 AM1
09:00 - 09:15 SCG54-01 The birth of an oceanic island arc by subduction initiation Osamu Ishizuka
09:15 - 09:30 SCG54-02 A review of seismic studies in the Izu-Bonin Arc: Uncovering crustal formation processes related to island arc volcanism Shuichi Kodaira
09:30 - 09:45 SCG54-03 Basaltic old knoll at the northeastern flank of Nishinoshima Kenta Yoshida
09:45 - 10:00 SCG54-04 Magma–water interaction during the 2022 shallow sea eruption at Ioto, Ogasawara, Japan Takahiro Miwa
10:00 - 10:15 SCG54-05 Superheated magma in Koolau volcano, Hawaii: An alternative hypothesis for the origin of high-silica tholeiite and excess NiO in olivine Eiichi Takahashi
Oral Presentation May 31 AM2
10:45 - 11:00 SCG54-06 Volcanic activity and crisis management at Kuchinoerabujima volcano Masato Iguchi
11:00 - 11:15 SCG54-07 Is the Iriomotejima NNE submarine volcano Irizuni? Koji Ito
11:15 - 11:30 SCG54-08 Seismic velocity structure at Kikai submarine caldera deduced from amphibious passive seismic observation Yojiro Yamamoto
11:30 - 11:45 SCG54-09 The eruption sequence and products of the 2023 eruption off the Okinahama beach, Ioto(Iwojima), Japan Masashi NAGAI
11:45 - 12:00 SCG54-10 Drifted pumice from Ioto found in the Nansei Islands Reona Hiramine
Oral Presentation May 31 PM1
13:45 - 14:00 SCG54-11 August 2021 eruption of Fukutoku-Oka-no-Ba Volcano, Izu-Bonin Arc: Understanding the eruption and tephra dispersal mechanisms from rapid response seafloor surveys Kenichiro Tani
14:00 - 14:15 SCG54-12 The Sofu seamount present in the source area of the October 9, 2023 earthquake and tsunami Toshiya Fujiwara
14:15 - 14:30 SCG54-13 Earthquake activities near the Sofu Seamount with possible relations to Tsunamis observed in October 2023 Koichiro Obana
14:30 - 14:45 SCG54-14 Back-tracking drift simulation of pumice found near Torishima on October 20, 2023 Tatsu Kuwatani
14:45 - 15:00 SCG54-15 Analysis of T-phases associated with the 2022 Tonga volcanic eruptions recorded by MERMAIDs Satoshi Murakami
Presentation No Title Presenter
Poster Presentation May 31 PM3
SCG54-P01 Cryptic silicic magma beneath Izu-Tobu volcanoes: Constraints from trace element compositions of plagioclase phenocrysts Hidemi Ishibashi
SCG54-P02 Lithofacies and rock-magnetic properties of borehole cores drilled on the submarine caldera wall of the Kikai Caldera Kuniaki Nishiki
SCG54-P03 The shallow conduit process of the 2020 violent Strombolian eruption of Nishinoshima inferred from the volcanic ash MORI YOHEI
SCG54-P04 The Life of Submarine Caldera Volcanoes in Oceanic Arcs – A Hypothesis Fumihiko Ikegami
SCG54-P05 Geochemical characteristics and magma dynamics of rhyolitic volcanism in the southern Izu intra-arc rift zone Satoru Haraguchi
SCG54-P06 Detection of volcanic earthquakes by DAS observation using Tonga seafloor telecommunications cable Shunsuke Nakao
SCG54-P07 Mysterious bubble shapes in the lava from Doyo Seamount Atsuko Namiki
SCG54-P08 Measurement of connected and isolated porosities by water-displacement method in studies of drifting pumice Shingo Takeuchi
SCG54-P09 Differentiation process of basaltic magma of Inamura-dake, Satsuma Iwo Jima Sayaka Yoshimura
SCG54-P10 On prominent hydro-acoustic signals associated with earthquakes near Torishima Island on October 9th 2023 (JST) Ryoichi Iwase
SCG54-P11 Basalts and magnesian andesites from Hunga volcano in the Tonga arc Yoshihiko Tamura
SCG54-P12 Magnesian andesites from Kibblewhite volcano in the Kermadec Arc, New Zealand Yoshihiko Tamura