Geshi Nobuo 下司信夫

… Alternative Names

GESHI Nobuo 下司信夫

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Researcher Number	70356955
Other IDs
Affiliation (Current)	2025: 九州大学, 理学研究院, 教授
Affiliation (based on the past Project Information) *help	2024 – 2025: 九州大学, 理学研究院, 教授 2016 – 2023: 国立研究開発法人産業技術総合研究所, 地質調査総合センター, 研究グループ長 2015 – 2016: 国立研究開発法人産業技術総合研究所, その他部局等, 研究員 2015: 国立研究開発法人産業技術総合研究所, 活断層・火山研究部門, 研究グループ長 2015: 産業技術総合研究所, 活断層・火山研究部門, 研究グループ長 … More 2015: 産業技術総合研究所, 活断層火山研究部門, グループ長 2013 – 2014: 独立行政法人産業技術総合研究所, 活断層・火山研究部門, 主任研究員 2013: 産業技術総合研究所, 地質情報研究部門, 研究員 2009 – 2013: National Institute of Advanced Industrial Science and Technology, 地質情報研究部門, 研究員 2011 – 2012: 独立行政法人産業技術総合研究所, 地質情報研究部門, 主任研究員 2010: 北海道大学, 産業技術総合研究所, 研究員 2010: 独立行政法人産業技術総合研究所, 地質調査情報センター, 研究員 2010: 産業技術総合研究所, 研究員 2009: 産業技術総合研究所, 地質情報研究部門, 研究員 Less
Review Section/Research Field	Principal Investigator Basic Section 17040:Solid earth sciences-related / Natural disaster science Except Principal Investigator Petrology/Mineralogy/Economic geology / Solid earth and planetary physics / Basic Section 17040:Solid earth sciences-related / Natural disaster science
Keywords	Principal Investigator マグマ / 噴火 / 火山 / 火道 / 三宅島 / 桜島 / メルト包有物 / 割れ目噴火 / 噴火推移予測 / 含水量 … More / 顕微ラマン分光 / 減圧速度 / マグマ減圧率 / 過剰圧 / 爆発性 / マグマ上昇速度 / マグマ過剰圧 / カルデラ陥没 / 爆発的噴火 / マグマ溜まり / 火山爆発 / イタリア / 国際情報交換 / 火口 / 爆発 / 噴火予測 / ダイク / 自然災害 / 地質学 … More Except Principal Investigator 火山噴火 / 火山 / 脱ガス / マグマ / マグマ粘性 / ナノライト / マイクロライト / 噴火様式 / 火山観測 / 噴火 / 自然災害 / 野外調査 / 特徴量 / 岩相 / 自動認識 / 特徴量抽出 / 画像認識 / 地質調査 / 露頭 / 発泡 / 揮発性成分 / 宝永噴火 / 石基 / サブプリニー式噴火 / ブルカノ式噴火 / 新燃岳 / 結晶サイズ分布 / その場観察 / 減圧結晶化 / X線CT / レオロジー / 石基鉱物 / 火山爆発 / 土砂災害 / 減災 / 帰島 / 避難 / 警報 / 火山災害 / 火山ガス組成 / 火山ガス放出量 / 火山ガス / 潜水艇 / 電気伝導度構造探査 / 東太平洋海膨 / 中央海嶺 / 海洋地殻・マントル / 巨大溶岩流 / モホ遷移帯 / オフリッジ火山群 / 高速拡大海嶺 / 融合 / 海底溶岩流 / 内成的成長 / 定置過程 / 複合溶岩流 / オマーンオフィオライト / 1256深海掘削孔 / 深海掘削 / 巨大海底溶岩流 / オフリッジ火山 / 安全・安心 / 自然災害予測 / 噴火シナリオ / 自然現象観測・予測 / 防災 / 現象観測・予測 / 自然 / 火山噴火予知 / 火山噴火シナリオ / ハザードマップ / FEP Less

Transition of explosive eruptions and magma ascending process revealed by water diffusion decompression velocimetryPrincipal Investigator
- Principal Investigator
  
  下司信夫
- Project Period (FY)
  2025 – 2027
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 17040:Solid earth sciences-related
- Research Institution
  Kyushu University
マグマ過剰圧とその時間変化の追跡による爆発的割れ目噴火推移過程の解明Principal Investigator
- Principal Investigator
  
  下司信夫
- Project Period (FY)
  2022 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 17040:Solid earth sciences-related
- Research Institution
  National Institute of Advanced Industrial Science and Technology
岩相の特徴量自動認識による火山性露頭その場調査手法の研究
- Principal Investigator
  
  春山純一
- Project Period (FY)
  2022 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 17040:Solid earth sciences-related
- Research Institution
  Japan Aerospace EXploration Agency
Relationship between explosivity and driving force of eruption inferred from conduit geometryPrincipal Investigator
- Principal Investigator
  
  Geshi Nobuo
- Project Period (FY)
  2019 – 2023
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 17040:Solid earth sciences-related
- Research Institution
  National Institute of Advanced Industrial Science and Technology
高温変形実験による浅所貫入マグマ物性の研究
- Principal Investigator
  
  Nakamura Michihiko
- Project Period (FY)
  2016
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Petrology/Mineralogy/Economic geology
- Research Institution
  Tohoku University
Development of near-real time volcanology based on in-situ observation experiments of shallow magmatic processes
- Principal Investigator
  
  Nakamura Michihiko
- Project Period (FY)
  2016 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research (S)
- Research Field
  
  Petrology/Mineralogy/Economic geology
- Research Institution
  Tohoku University
Integrated study on the 2015 eruption at the Kuchinoerabujima volcano
- Principal Investigator
  
  Iguchi Masato
- Project Period (FY)
  2015
- Research Category
  
  Grant-in-Aid for Special Purposes
- Research Institution
  Kyoto University
Material budget of volcanic eruptions
- Principal Investigator
  
  shinohara hiroshi
- Project Period (FY)
  2013 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Solid earth and planetary physics
- Research Institution
  National Institute of Advanced Industrial Science and Technology
Structural development of shallow conduit of explosive eruptionPrincipal Investigator
- Principal Investigator
  
  GESHI Nobuo
- Project Period (FY)
  2012 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Natural disaster science
- Research Institution
  National Institute of Advanced Industrial Science and Technology
Magma processes in the Moho Transition Zone: an insight from volcanoes off the fast-spreading ridges
- Principal Investigator
  
  UMINO SUSUMU
- Project Period (FY)
  2010 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Solid earth and planetary physics
- Research Institution
  Kanazawa University
Mechanism of dike growth within a mechanically-heterogeneous host rockPrincipal Investigator
- Principal Investigator
  
  GESHI Nobuo
- Project Period (FY)
  2009 – 2011
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Natural disaster science
- Research Institution
  National Institute of Advanced Industrial Science and Technology
A Study on the Volcanic Scenario Adapting the FEP Analysis
- Principal Investigator
  
  MURAKAMI Makoto
- Project Period (FY)
  2008 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Natural disaster science
- Research Institution
  Hokkaido University

[Journal Article] 火山災害軽減のための地質情報2023
- Author(s)
  下司信夫
- Journal Title
  
  月刊地球
  
  Volume: 45 Pages: 15-25
- Data Source
  KAKENHI-PROJECT-22K03785
[Journal Article] Caldera collapse thresholds correlate with magma chamber dimensions2023
- Author(s)
  Geshi Nobuo、Miyagi Isoji、Saito Genji、Conway Chris E.
- Journal Title
  
  Scientific Reports
  
  Volume: 13 Issue: 1 Pages: 1-9
- DOI
  10.1038/s41598-023-34411-5
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K23471, KAKENHI-PROJECT-22K03785
[Journal Article] Evolution of the magma plumbing system of Miyakejima volcano with periodic recharge of basaltic magmas2022
- Author(s)
  Geshi Nobuo、Oikawa Teruki、Weller Derek J.、Conway Chris E.
- Journal Title
  
  Earth, Planets and Space
  
  Volume: 74 Issue: 1 Pages: 20-20
- DOI
  10.1186/s40623-022-01577-7
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04024, KAKENHI-PROJECT-19K23471
[Journal Article] Shallow crystallization of eruptive magma inferred from volcanic ash microtextures: a case study of the 2018 eruption of Shinmoedake volcano, Japan2021
- Author(s)
  Keiko Matsumoto, Nobuo Geshi
- Journal Title
  
  Bulletin of Volcanology
  
  Volume: 83 Issue: 5 Pages: 31-31
- DOI
  10.1007/s00445-021-01451-6
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K14820, KAKENHI-PROJECT-16H06348
[Journal Article] Shallow crystallization of eruptive magma inferred from volcanic ash microtextures: a case study of the 2018 eruption of Shinmoedake volcano, Japan2021
- Author(s)
  Matsumoto, K., Geshi, N.
- Journal Title
  
  Bulletin of Volcanology
  
  Volume: 83
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] 火山灰カタログ3：阿蘇山（中岳）2014～2016年噴火噴出物2020
- Author(s)
  松本恵子・大槻静香・下司信夫
- Journal Title
  
  地質調査総合センター研究資料集
  
  Volume: 703
- Open Access
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] 火山灰カタログ２：2-1. 草津白根山（本白根山）2018年噴火噴出物，2-2. 御嶽山2014年噴火噴出物，2-3. 雲仙岳（普賢岳）1990年～1995年噴火噴出物，2-4. 三宅島2000年噴火噴出物2020
- Author(s)
  松本恵子・下司信夫・島村哲也・岩橋くるみ
- Journal Title
  
  地質調査総合センター研究資料集
  
  Volume: 697 Pages: 1-29
- Open Access
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] Magmatic overpressures, volatile exsolution and potential explosivity of fissure eruptions inferred via dike aspect ratios2020
- Author(s)
  Geshi Nobuo、Browning John、Kusumoto Shigekazu
- Journal Title
  
  Scientific Reports
  
  Volume: 10 Issue: 1 Pages: 9406-9406
- DOI
  10.1038/s41598-020-66226-z
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04024
[Journal Article] Shift from magmatic to phreatomagmatic explosions controlled by the lateral evolution of a feeder dike in the Suoana-Kazahaya eruption, miyakejma Volcano, Japan2019
- Author(s)
  N Geshi、 K Nemeth、 R Noguchi、 T Oikawa
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: 511 Pages: 177-189
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] Shallow magma pre-charge during repeated Plinian eruptions at Sakurajima volcano2019
- Author(s)
  N Araya、 M Nakamura、 A Yasuda、 S Okumura、 T Sato、 M Iguchi、 D Miki、 N Geshi
- Journal Title
  
  Scientific Reports
  
  Volume: 9 Issue: 1
- DOI
  10.1038/s41598-019-38494-x
- NAID
  120006645298
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] Pyroclastic density currents associated with the 2015 phreatomagmatic eruption of the Kuchinoerabujima volcano2019
- Author(s)
  N Geshi、 J Itoh
- Journal Title
  
  Earth Planet Space
  
  Volume: 70 Pages: 119-119
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] エネルギー分散型エックス線分析装置による火山ガラス含水量の簡易定量法2017
- Author(s)
  下司信夫, 宮城磯治, 斎藤元治
- Journal Title
  
  火山
  
  Volume: 62 Pages: 13-22
- NAID
  130005492600
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] The 1914 Taisho eruption of Sakurajima volcano: stratigraphy and dynamics of the largest explosive event in Japan during the 20th century2017
- Author(s)
  Todde, A., Cioni, R., Pistolesi, M., Geshi, N., Bonadonna, C.
- Journal Title
  
  Bulletin of volcanology
  
  Volume: 79 Issue: 10 Pages: 72-72
- DOI
  10.1007/s00445-017-1154-4
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] Orientation of the Eruption Fissures Controlled by a Shallow Magma Chamber in Miyakejima2016
- Author(s)
  Nobuo Geshi, Teruki Oikawa
- Journal Title
  
  Frontiers in Earth Science
  
  Volume: 4 Pages: 99-99
- DOI
  10.3389/feart.2016.00099
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] Phreatomagmatic eruptions of 2014 and 2015 in Kuchinoerabujima Volcano triggered by a shallow intrusion of magma2016
- Author(s)
  Nobuo Geshi, Masato Iguchi, Hiroshi Shinohara
- Journal Title
  
  Journal of Natural Disaster Science
  
  Volume: 37 Pages: 67-78
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H06348
[Journal Article] Conduit enlargement during the precursory Plinian eruption of Aira Caldera, Japan2016
- Author(s)
  Geshi N. and Miyabuchi, Y.
- Journal Title
  
  Bulletin of Volcanology
  
  Volume: 78 Issue: 9 Pages: 63-63
- DOI
  10.1007/s00445-016-1057-9
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K01251, KAKENHI-PROJECT-16H06348
[Journal Article] Evaluating volume for magma chambers and magma withdrawn for caldera collapse2014
- Author(s)
  Nobuo Geshi, Joel Ruch, Valerio Acocella
- Journal Title
  
  Earth and Planetary Science Letters
  
  Volume: 396 Pages: 107-115
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24510251
[Journal Article] Dynamic feeder dyke systems in basaltic volcanoes: the exceptional example of the 1809 Etna eruption (Italy).2014
- Author(s)
  Nobuo Geshi, Marco Neri
- Journal Title
  
  Frontiers in Earth Science
  
  Volume: 2
- DOI
  10.3389/feart.2014.00013
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-24510251
[Journal Article] Temporal variation in volcanic ash texture during a vulcanian eruption at the Sakurajima volcano, Japan2013
- Author(s)
  Miwa, T., Geshi, N., Shinohara, H.
- Journal Title
  
  J. Volcanol. Geotherm. Res.
  
  Volume: 260 Pages: 80-89
- DOI
  10.1016/j.jvolgeores.2012.03.003
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25287115
[Journal Article] Effects of mechanical layering of host rocks on dike growth and arrest2012
- Author(s)
  Geshi N.、Kusumoto S.、Gudmundsson A.
- Journal Title
  
  Journal of Volcanology and Geothermal Research
  
  Volume: 223-224 Pages: 74-82
- DOI
  10.1016/j.jvolgeores.2012.02.004
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21710182
[Journal Article] From structure-to erosion-controlled subsiding calderas : evidence thresholds and mechanics2012
- Author(s)
  Geshi N.、Acocella V.、Ruch J.
- Journal Title
  
  Bulletin of Volcanology.
  
  Volume: (印刷中) Issue: 6 Pages: 1553-1567
- DOI
  10.1007/s00445-012-0617-x
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21710182
[Journal Article] Growth of phreatomagmatic explosion craters : A model inferred from Suoana crater in Miyakejima Volcano, Japan2011
- Author(s)
  Geshi N., Nemeth K, Oikawa T
- Journal Title
  
  Journal of Volcanology and Geothermal Research
  
  Volume: 201 Pages: 30-39
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21710182
[Journal Article] Growth of phreatomagmatic explosion craters : a model inferred from Suoana crater in Miyakejma Volcano、Japan2011
- Author(s)
  Geshi N.、Nemeth K.、Oikawa T.
- Journal Title
  
  Journal of Volcanology and Geothermal Research
  
  Volume: 201 Issue: 1-4 Pages: 30-38
- DOI
  10.1016/j.jvolgeores.2010.11.012
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21710182
[Journal Article] The geometric difference between non-feeders and feeder dikes.2010
- Author(s)
  Geshi N, Kusumoto S, Gudmundsson A
- Journal Title
  
  Geology 38
  
  Pages: 195-198
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21710182
[Journal Article] Geometric difference between non-feeder and feeder dikes2010
- Author(s)
  Geshi N.、Kusumoto S.、Gudmundsson A.
- Journal Title
  
  Geology
  
  Volume: 38 Issue: 3 Pages: 195-198
- DOI
  10.1130/g30350.1
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] Decompression of magma chamber toward caldera collapse and eruption of voluminous ignimbrite2024
- Author(s)
  Nobuo Geshi
- Organizer
  Submarine caldera volcanoes - The cutting edge of our understanding achieved by various approaches -
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04024
[Presentation] Different styles of magma chamber decompression revealed by VEI 7 caldera-forming eruptions at Aira and Kikai calderas in Japan2023
- Author(s)
  下司信夫・斎藤元治・宮城磯治・Conway Chris
- Organizer
  IAVCEI 2023 Scientific Assembly
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03785
[Presentation] 惑星火山露頭調査効率化の研究　その２2023
- Author(s)
  春山純一、下司信夫、野口里奈、白尾元理、池谷広大、藤本圭一郎、庄司大悟
- Organizer
  日本地球惑星科学連合大会　2023年
- Data Source
  KAKENHI-PROJECT-23K22597
[Presentation] 教師あり機械学習手法を用いた可視画像からの露頭領域抽出2023
- Author(s)
  野口里奈、庄司大悟、藤本圭一郎、下司信夫、白尾元理、春山純一
- Organizer
  日本地球惑星科学連合大会　2023年
- Data Source
  KAKENHI-PROJECT-23K22597
[Presentation] 地質調査手法の高度化のための地層の特徴量自動認識アルゴリズムの初期適用2023
- Author(s)
  藤本圭一郎、春山純一、下司信夫、野口里奈
- Organizer
  日本地球惑星科学連合大会　2023年
- Data Source
  KAKENHI-PROJECT-23K22597
[Presentation] 乱れの少ない火山性露頭に対する地層の特徴量自動認識アルゴリズムの初期適用2023
- Author(s)
  藤本圭一郎、春山純一、下司信夫、野口里奈
- Organizer
  日本惑星科学会　秋季講演会
- Data Source
  KAKENHI-PROJECT-23K22597
[Presentation] Pressure evolution in magma chamber on the development of collapse caldera2023
- Author(s)
  Nobuo Geshi
- Organizer
  IAVCEI the 8th Collapse Caldera Workshop
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K04024
[Presentation] Decompression of magma chamber toward caldera collapse and eruption of voluminous ignimbrite2023
- Author(s)
  Geshi, N., Miyagi, I., Saito, G. Conway, C.E.
- Organizer
  International Union of Geodesy and Geophysics2023 Assembly
- Data Source
  KAKENHI-PROJECT-22K03785
[Presentation] 桜島 1914 年噴火のプリニー式噴火期のマグマ上昇過程2023
- Author(s)
  下司信夫
- Organizer
  日本火山学会2023年秋季大会
- Data Source
  KAKENHI-PROJECT-22K03785
[Presentation] 桜島1914年噴火のプリニー式噴火期のマグマ上昇過程2023
- Author(s)
  下司信夫
- Organizer
  日本火山学会2023年秋季大会
- Data Source
  KAKENHI-PROJECT-19K04024
[Presentation] 視覚情報からの野外地質構造判断プロセス解析：画像情報によるリモートセンシング地質調査への応用2023
- Author(s)
  下司信夫、野口里奈、白尾元理、庄司大悟、藤本圭一郎、池谷広大、春山純一
- Organizer
  日本地球惑星科学連合大会　2023年
- Data Source
  KAKENHI-PROJECT-23K22597
[Presentation] 大規模火砕噴火の準備・トリガー・推移とそのメカニズム2023
- Author(s)
  下司信夫
- Organizer
  日本地球惑星科学連合2023年大会
- Invited
- Data Source
  KAKENHI-PROJECT-19K04024
[Presentation] 姶良・鬼界カルデラの形成噴火におけるマグマ溜まり減圧過程2022
- Author(s)
  下司信夫・斎藤元治・宮城磯治・Conway Chris
- Organizer
  日本火山学会2022年秋季大会
- Data Source
  KAKENHI-PROJECT-22K03785
[Presentation] Conduit pre-charge during repeated Plinian eruptions at Sakurajima volcano2020
- Author(s)
  Naoki Araya, Michihiko Nakamura, Atsushi Yasuda, Satoshi Okumura, Tomoki Sato, Masato Iguchi, Daisuke Miki, Nobuo Geshi
- Organizer
  American Geophysical Union Fall Meeting 2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Conduit pre-charge during repeated Plinian eruptions at Sakurajima volcano2020
- Author(s)
  N. Araya, M. Nakamura, A. Yasuda, S. Okumura, T. Sato, D. Miki, M. Iguchi, N. Geshi
- Organizer
  AGU FALL MEETING 2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] 桜島火山ブルカノ式噴火前のマグマプロセス：岩石学・地球物理学の連携研究2019
- Author(s)
  坂内野乃、中村美千彦、安田敦、奥村聡、新谷直己、井口正人、味喜大介、下司信夫
- Organizer
  日本地球惑星科学連合2019年大会
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Temperature dependence of chemical compositions of magnetite in a silicic magma2019
- Author(s)
  N. Araya、 M. Nakamura、S. Okumura、A. Yasuda、D. Miki、M. Iguchi、N. Geshi
- Organizer
  JSPS Japanese-German graduate externship International Workshop on “Volatile Cycles”
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Distribution of ash-fall deposits from Vulcanian eruptions and minor ash emission of Sakurajima Volcano2018
- Author(s)
  M. Oishi、 K. Nishiki、 N. Geshi、 R. Furukawa
- Organizer
  Cities on Volcanoes 10
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] 噴火活動評価のための火山噴出物カタログの作成2018
- Author(s)
  大槻静香、松本恵子、下司信夫
- Organizer
  日本火山学会2018年秋季大会
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] 三宅島火山すおう穴－風早噴火におけるマグマ噴火からマグマ水蒸気噴火への推移とそのメカニズム2018
- Author(s)
  下司信夫
- Organizer
  日本火山学会2018年秋季大会
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] 火山噴出物粒子のX 線元素マッピングによる識別2018
- Author(s)
  松本恵子、大槻静香、下司信夫
- Organizer
  日本火山学会2018年秋季大会
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Very shallow magma storage depths at Sakurajima Volcano revealed from melt inclusions and plagioclase-melt hygrometer2018
- Author(s)
  N. Araya、 M. Nakamura. S. Okumura、 A. Yasuda、 D. Miki、 M. Iguchi、 N. Geshi
- Organizer
  JpGU-AGU Joint Meeting 2018
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] 口永良部島2015年噴火に伴う火砕流堆積物の特徴2017
- Author(s)
  下司信夫、伊藤順一
- Organizer
  日本地球惑星科学連合2017年大会
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Estimation of the re-equilibrium depths of the Sakurajima vulcanian eruption magma from 2010 to 20152017
- Author(s)
  N. Sakauchi、M. Nakamura、A. Yasuda、S. Okumura、N. Geshi
- Organizer
  JpGU-AGU Joint Meeting 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] 大規模珪長質火砕噴火の準備過程2017
- Author(s)
  下司信夫
- Organizer
  日本火山学会2017年秋季大会
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Pre-eruptive magma re-equilibration at the recent Sakurajima vulcanian activities2017
- Author(s)
  N. Sakauchi、M. Nakamura、A. Yasuda、S. Okumura、N. Geshi
- Organizer
  Earth Sea and Sky II: International Joint Graduate Program Workshop in Earth and Environmental Sciences co-hosted by the Tohoku University GP-EES and JSPS-DFG Japanese-German Graduate Externship
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Textural relaxation and permeability evolution of bubble-bearing magmas2017
- Author(s)
  S. Otsuki、N. Geshi、S. Okumura、O. Sasaki
- Organizer
  JpGU-AGU Joint Meeting 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Microstructural relaxation of andesitic magma foam2017
- Author(s)
  S. Otsuki、 N. Geshi、 S. Okumura、 M. Nakamura、 O. Sasaki
- Organizer
  IAVCEI 2017 Scientific Assembly
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Phreatomagmatic explosive eruption in high stratovolcanoes triggered by lateral fissure propagation: Examples from Mt. Etna and Miyakejima2016
- Author(s)
  N. Geshi、K. Nemeth、 M. Neri
- Organizer
  The 3rd International Workshop on Volcano Geology
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] Pre-eruptive magma re-equilibration at the recent Sakurajima vulcanian activities2016
- Author(s)
  N. Sakauchi、M. Nakamura、A. Yasuda、S. Okumura、N. Geshi
- Organizer
  JSPS Japanese-German Graduate Externship International Workshops "New Challenges in Volatile Cycling in the Deep Earth"
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H06348
[Presentation] 口永良部島火山2014-15 年噴火とその火砕流2015
- Author(s)
  下司信夫・小林哲夫・井村隆介・井口正人
- Organizer
  日本火山学会2015年度秋季大会
- Place of Presentation
  富山大学
- Year and Date
  2015-09-28
- Data Source
  KAKENHI-PROJECT-15H05794
[Presentation] 阿蘇火山の火口湖活動から噴火への推移に伴う火山ガス組成変化2015
- Author(s)
  篠原宏志、下司信夫、横尾亮彦、風早竜之介
- Organizer
  地球惑星科学連合大会
- Place of Presentation
  幕張、千葉
- Year and Date
  2015-05-28
- Data Source
  KAKENHI-PROJECT-25287115
[Presentation] VariationofvolcanicgascompositionduringtransitionfromcraterlakeactivitytoeruptionatAsovo lcano,Japan2015
- Author(s)
  Shinohara, H., Geshi, N., Yokoo, A., Kazahaya R.
- Organizer
  IUGG General Assembly
- Place of Presentation
  プラハ、チェコ共和国
- Year and Date
  2015-07-01
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25287115
[Presentation] 2013. Structural variation of the feeder dikes of explosive eruptions in Miyakejima, Japan2013
- Author(s)
  Nobuo Geshi, Teruki Oikawa
- Organizer
  IAVCEI 2013 Scientific Assembly
- Place of Presentation
  Kagoshima, Japan
- Data Source
  KAKENHI-PROJECT-24510251
[Presentation] Structural variation of the feeder dikes of explosive eruptions in Miyakejima, Japan2013
- Author(s)
  Nobuo Geshi
- Organizer
  European Geosciences Union General Assembly 2013
- Place of Presentation
  Austria Center Vienna, Vienna, Austria
- Data Source
  KAKENHI-PROJECT-24510251
[Presentation] Structural variation of the feeder dikes of explosive eruptions in Miyakejima, Japan.2013
- Author(s)
  Nobuo Geshi
- Organizer
  European Geoscience Union General Assembly 2013
- Place of Presentation
  Vienna, Austria
- Data Source
  KAKENHI-PROJECT-24510251
[Presentation] Structural development in matured collapse caldera: from structural control to erosional control2012
- Author(s)
  Nobuo Geshi, Valerio Acocella, Joel Ruch
- Organizer
  4th International Workshop on Collapse Calderas
- Place of Presentation
  Auditorium Comune Bolsena, Bolsena, Lazio, Italy
- Data Source
  KAKENHI-PROJECT-24510251
[Presentation] Relationships between caldera size and eruptive volume of magma2011
- Author(s)
  Nobuo Geshi, Joel Ruch, Valerio Acocella
- Organizer
  European Geosciences Union General Assembly 2011
- Place of Presentation
  Austria Center Vienna,ウィーン市,オーストリア
- Year and Date
  2011-04-07
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] FEP解析を応用した火山噴火シナリオ構築手法の検討-演繹的推論的要素導入の試み-2011
- Author(s)
  村上亮,川村淳,牧野仁史,下司信夫,及川輝樹,西村卓也,梅田浩司,佐々木寿,瀬尾俊弘,大井貴夫
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張市
- Year and Date
  2011-05-22
- Data Source
  KAKENHI-PROJECT-20310107
[Presentation] FEP解析を応用した火山噴火シナリオ構築手法の検討-その具体例の提示-2011
- Author(s)
  村上亮,川村淳,牧野仁史,下司信夫,及川輝樹,西村卓也,梅田浩司,佐々木寿,瀬尾俊弘,大井貴夫
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張市
- Year and Date
  2011-05-22
- Data Source
  KAKENHI-PROJECT-20310107
[Presentation] FEP解析手法を応用した火山噴火シナリオ構築手法の検討2010
- Author(s)
  村上亮,川村淳,牧野仁史,下司信夫,及川輝樹,佐々木寿,瀬尾俊弘,西村卓也・梅田浩司・大井貴夫
- Organizer
  日本地球惑星科学連合2010年大会
- Place of Presentation
  幕張市
- Year and Date
  2010-05-23
- Data Source
  KAKENHI-PROJECT-20310107
[Presentation] Dike thickness controlled by the layering of the host rock2010
- Author(s)
  Geshi N, Kusumoto S, Gudmundsson, A
- Organizer
  European Geosciences Union 2010 General Assembly
- Place of Presentation
  Austria International Center, Vienna, (Austria)
- Year and Date
  2010-05-05
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] オフリッジ火山から高速拡大海嶺のモホ遷移帯マグマプロセスとプレート拡大の実体に迫る2010
- Author(s)
  海野進・下司信夫・岸木清行・石塚治・笠谷貴史・熊谷英憲・浅田美穂・後藤忠徳・宮下純夫・富永雅子
- Organizer
  日本地質学会第117年学術大会
- Place of Presentation
  富山招待講演
- Year and Date
  2010-09-20
- Data Source
  KAKENHI-PROJECT-22403004
[Presentation] 母岩物性の不均質を反映したダイクの発達過程2010
- Author(s)
  下司信夫、楠本成寿、A.ガドマドソン
- Organizer
  日本地球惑星科学連合2010年大会幕張メッセ国際会議場
- Place of Presentation
  千葉県千葉市
- Year and Date
  2010-05-23
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] Caldera wall stability : evolution process of funnel caldera2010
- Author(s)
  Geshi N, Acocella, V., Ruch J
- Organizer
  Collapse caldera workshop 2010, La Reunion
- Place of Presentation
  Reunion大学(France)
- Year and Date
  2010-10-04
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] 母岩物性の不均質を反映した岩脈の発達過程2010
- Author(s)
  下司信夫, 楠本成寿, A.ガドマドソン
- Organizer
  日本地球惑星科学連合2010年大会
- Place of Presentation
  幕張メッセ国際会議場(千葉県)
- Year and Date
  2010-05-25
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] Dike thickness controlled by the layering of the host rock2010
- Author(s)
  Nobuo Geshi、Shigekazu Kusumoto、Agust Gudmundsson、Agust Gudmundsson
- Organizer
  European Geosciences Union General Assembly 2010
- Place of Presentation
  Austria Center Vienna
- Year and Date
  2010-05-05
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] Vertical structural variation of the dikes exposed in the Miyakejima 2000 caldera2009
- Author(s)
  N Geshi, A Gudmundsson, S Kusumoto
- Organizer
  European Geosciences Union, General Assembly 2009
- Place of Presentation
  Austria Center Vienna, Wien, Austria
- Year and Date
  2009-04-22
- Data Source
  KAKENHI-PROJECT-21710182
[Presentation] FEP解析手法を応用した演繹的火山噴火シナリオ作成の推定ロジックルールの試作と三宅島2000噴火経過予測への試験的適用2009
- Author(s)
  村上亮,川村淳,佐々木寿,牧野仁史,瀬尾俊弘,西村卓也,梅田浩司,大井貴夫,下司信夫,及川輝樹
- Organizer
  日本火山学会秋季大会
- Place of Presentation
  小田原市
- Year and Date
  2009-10-12
- Data Source
  KAKENHI-PROJECT-20310107
[Presentation] FEP解析手法を応用した火山噴火シナリオの検討-伊豆大島への適用事例-2009
- Author(s)
  村上亮,川村淳,佐々木寿,牧野仁史,瀬尾俊弘,西村卓也,梅田浩司,大井貴夫,下司信夫,及川輝樹
- Organizer
  日本地球惑星科学連合大会
- Place of Presentation
  幕張市
- Year and Date
  2009-05-16
- Data Source
  KAKENHI-PROJECT-20310107
[Presentation] Precursory eruption of caldera-collapse
- Author(s)
  Nobuo Geshi
- Organizer
  5th Collapse Caldera Workshop
- Place of Presentation
  Taupo, New Zealand
- Year and Date
  2014-12-07 – 2014-12-11
- Data Source
  KAKENHI-PROJECT-24510251
[Presentation] Feeder dyke systems in outcrops; key to understand detailed eruption process within shallow conduit by geological methods
- Author(s)
  Nobuo Geshi
- Organizer
  1st International Workshop on Volcano Geology
- Place of Presentation
  Madeira, Portugal
- Year and Date
  2014-07-07 – 2014-07-11
- Data Source
  KAKENHI-PROJECT-24510251
[Presentation] 苦鉄質火山の火道断面構造から推測される噴火プロセス
- Author(s)
  下司信夫
- Organizer
  日本火山学会2014年秋季大会
- Place of Presentation
  福岡大学七隈キャンパス
- Year and Date
  2014-11-02 – 2014-11-04
- Data Source
  KAKENHI-PROJECT-24510251

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Geshi Nobuo 下司 信夫

GESHI Nobuo 下司 信夫

Research Projects

Research Products

Co-Researchers

Transition of explosive eruptions and magma ascending process revealed by water diffusion decompression velocimetryPrincipal Investigator

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マグマ過剰圧とその時間変化の追跡による爆発的割れ目噴火推移過程の解明Principal Investigator

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岩相の特徴量自動認識による火山性露頭その場調査手法の研究

Principal Investigator

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Research Institution

Relationship between explosivity and driving force of eruption inferred from conduit geometryPrincipal Investigator

Principal Investigator

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Review Section

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高温変形実験による浅所貫入マグマ物性の研究

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Development of near-real time volcanology based on in-situ observation experiments of shallow magmatic processes

Principal Investigator

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Integrated study on the 2015 eruption at the Kuchinoerabujima volcano

Principal Investigator

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Material budget of volcanic eruptions

Principal Investigator

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Structural development of shallow conduit of explosive eruptionPrincipal Investigator

Principal Investigator

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Magma processes in the Moho Transition Zone: an insight from volcanoes off the fast-spreading ridges

Principal Investigator

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Mechanism of dike growth within a mechanically-heterogeneous host rockPrincipal Investigator

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A Study on the Volcanic Scenario Adapting the FEP Analysis

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Research Field

Research Institution

[Journal Article] 火山災害軽減のための地質情報2023

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Geshi Nobuo 下司信夫

GESHI Nobuo 下司信夫