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Pacific Array (1): Exploration of the oldest Pacific mantle

Research Project

Project/Area Number 18H03735
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 17:Earth and planetary science and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Utada Hisashi  東京大学, 地震研究所, 名誉教授 (70134632)

Co-Investigator(Kenkyū-buntansha) 塩原 肇  東京大学, 地震研究所, 教授 (60211950)
川勝 均  東京大学, 地震研究所, 特任研究員 (60242153)
一瀬 建日  東京大学, 地震研究所, 助教 (60359180)
清水 久芳  東京大学, 地震研究所, 教授 (70302619)
馬場 聖至  東京大学, 地震研究所, 准教授 (70371721)
竹内 希  東京大学, 地震研究所, 教授 (90313048)
竹尾 明子  東京大学, 地震研究所, 助教 (90756933)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥45,890,000 (Direct Cost: ¥35,300,000、Indirect Cost: ¥10,590,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2018: ¥31,720,000 (Direct Cost: ¥24,400,000、Indirect Cost: ¥7,320,000)
Keywordsマントルダイナミクス / 海底長期観測 / リソスフェア・アセノスフェア境界 / 太平洋最古の海底 / 国際連携 / 太平洋の古い海底
Outline of Final Research Achievements

It has been a dream of Earth Scientists to install a new observational window for the Earths deep interior in the Pacific ocean, but is hard just to imagine to cover the entire basin by an equally-spaced dense observation network. However, this dream became an achievable goal by considering a new observation concept “array of arrays”, which was proposed by Japanese group. This proposal was accepted by international science community and a system of international collaboration named “the Pacific Array (PA)” was formed. The present project is one of the first arrays of PA conducted by Japan-Korea collaboration, aiming at the oldest Pacific basin. Ocean bottom seismometers and electromagnetometers were deployed in 2018 and all were successfully retrieved one year later. A set of fundamental data for revealing the evolution of the oldest part of the Pacific plate was obtained from integrated analyses of observed data.

Academic Significance and Societal Importance of the Research Achievements

枠組みが誕生して50年が経ち,いまや当たり前のことのように思えるプレートテクトニクスだが,基本的な物理メカニズムは未だ良くわかっておらず,海洋域におけるリソスフェア・アセノスフェアシステム(LAS)の研究に注目が集まっている.最近,プレートテクトニクスの基本的な構造が存在すると考えられる海洋LASの解明を目指す海底地震及び電磁気観測・解析の技術革新がなされ, LAS全体を深さ方向に連続的に探査できるようになったことは,観測研究上のブレークスルーである.本研究は太平洋の最古の海底下のLASを対象に,一億八千万年あまりにわたる進化の解明に不可欠の観測データの取得を目指すものである.

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (100 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (27 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 27 results,  Open Access: 16 results) Presentation (65 results) (of which Int'l Joint Research: 34 results,  Invited: 8 results) Book (1 results) Remarks (3 results) Funded Workshop (1 results)

  • [Int'l Joint Research] ソウル大学(韓国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Seoul National University/Kyungnam University/韓国海洋科学技術研究所(KIOST)(韓国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ソウル大学/韓国海洋科学技術研究所/忠南大学(韓国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] The thermal structure of subduction zones predicted by plate cooling models with variablethermal properties2022

    • Author(s)
      Morishige, M.
    • Journal Title

      Geophysical Journal International

      Volume: 229 Pages: 1490-1502

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effect of initial and prior models on phase tensor inversion of distorted magnetotelluric data2022

    • Author(s)
      Rung-Arunwan T.、Siripunvaraporn W.、Utada H.
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01611-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tilt observations at the seafloor by mobile ocean bottom seismometers2021

    • Author(s)
      H. Shiobara, A. Ito, H. Sugioka, M. Shinohara, T. Sato
    • Journal Title

      Front. Earth Sci.

      Volume: 8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lithosphere?asthenosphere boundary beneath the Sea of Japan from transdimensional inversion of S-receiver functions2021

    • Author(s)
      Akuhara Takeshi、Nakahigashi Kazuo、Shinohara Masanao、Yamada Tomoaki、Shiobara Hajime、Yamashita Yusuke、Mochizuki Kimihiro、Uehira Kenji
    • Journal Title

      Earth, Planets and Space

      Volume: 73 Issue: 1

    • DOI

      10.1186/s40623-021-01501-5

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis on microseism characteristics by typhoon ‘HAGIBIS’ using land and ocean-bottom seismometers2021

    • Author(s)
      Ko Ji-won、Kim Tae-shin、Park Ji-hoon、Oh Se-young、Chang Sung-Joon、Kim Ki Young、Lee Sang-Mook、Kim YoungHee、Utada Hisashi、Kawakatsu Hitoshi、Shiobara Hajime、Isse Takehi、Takeuchi Nozomu
    • Journal Title

      Journal of the Geological Society of Korea

      Volume: 57 Issue: 3 Pages: 339-352

    • DOI

      10.14770/jgsk.2021.57.3.339

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Drift of an ocean bottom electromagnetometer from the Bonin to Ryukyu Islands: estimation of the path and travel time by numerical tracking experiments2021

    • Author(s)
      Tada Noriko、Nishikawa Haruka、Ichihara Hiroshi、Watanabe Hiromi Kayama、Kuwatani Tatsu
    • Journal Title

      Earth, Planets and Space

      Volume: 73 Issue: 1

    • DOI

      10.1186/s40623-021-01552-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A New Reference Model for the Evolution of Oceanic Lithosphere in a Cooling Earth2021

    • Author(s)
      Korenaga Tomoko、Korenaga Jun、Kawakatsu Hitoshi、Yamano Makoto
    • Journal Title

      Journal of Geophysical Research: Solid Earth

      Volume: 126 Issue: 6

    • DOI

      10.1029/2020jb021528

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Seismic evidence for a thermochemical mantle plume underplating the lithosphere of the Ontong Java Plateau2021

    • Author(s)
      Isse Takehi、Suetsugu Daisuke、Ishikawa Akira、Shiobara Hajime、Sugioka Hiroko、Ito Aki、Kawano Yuki、Yoshizawa Kazunori、Ishihara Yasushi、Tanaka Satoru、Obayashi Masayuki、Tonegawa Takashi、Yoshimitsu Junko
    • Journal Title

      Communications Earth & Environment

      Volume: 2 Issue: 1 Pages: 98-98

    • DOI

      10.1038/s43247-021-00169-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unexpected Consequences of Transverse Isotropy2021

    • Author(s)
      Kawakatsu Hitoshi
    • Journal Title

      Bulletin of the Seismological Society of America

      Volume: 111 Issue: 1 Pages: 129-138

    • DOI

      10.1785/0120200205

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Broadband Ocean Bottom Seismology in Japan2020

    • Author(s)
      SUETSUGU Daisuke、SHIOBARA Hajime
    • Journal Title

      Zisin (Journal of the Seismological Society of Japan. 2nd ser.)

      Volume: 73 Issue: 0 Pages: 37-63

    • DOI

      10.4294/zisin.2019-6

    • NAID

      130007882463

    • ISSN
      0037-1114, 1883-9029, 2186-599X
    • Year and Date
      2020-06-05
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Validity of the dispersion relations in magnetotellurics. Part II: synthetic and field data2020

    • Author(s)
      Zorin Nikita、Alekseev Dmitry、Epishkin Dmitrii、Shimizu Hisayoshi、Yakovlev Denis、Zaytsev Sergey
    • Journal Title

      Earth, Planets and Space

      Volume: 72 Issue: 1

    • DOI

      10.1186/s40623-020-01273-4

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Persistent Long‐Period Signals Recorded by an OBS Array in the Western‐Central Pacific: Activity of Ambrym Volcano in Vanuatu2020

    • Author(s)
      Kawano Yuki、Isse Takehi、Takeo Akiko、Kawakatsu Hitoshi、Suetsugu Daisuke、Shiobara Hajime、Sugioka Hiroko、Ito Aki、Ishihara Yasushi、Tanaka Satoru、Obayashi Masayuki、Tonegawa Takashi、Yoshimitsu Junko
    • Journal Title

      Geophysical Research Letters

      Volume: 47 Issue: 19

    • DOI

      10.1029/2020gl089108

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inversion of Longer‐Period OBS Waveforms for P Structures in the Oceanic Lithosphere and Asthenosphere2020

    • Author(s)
      Takeuchi Nozomu、Kawakatsu Hitoshi、Shiobara Hajime、Isse Takehi、Sugioka Hiroko、Ito Aki、Utada Hisashi
    • Journal Title

      Journal of Geophysical Research: Solid Earth

      Volume: 125 Issue: 7

    • DOI

      10.1029/2019jb018810

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Probing 1-D electrical anisotropy in the oceanic upper mantle from seafloor magnetotelluric array data2020

    • Author(s)
      Matsuno Tetsuo、Baba Kiyoshi、Utada Hisashi
    • Journal Title

      Geophysical Journal International

      Volume: 222 Issue: 3 Pages: 1502-1525

    • DOI

      10.1093/gji/ggaa221

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ocean bottom geophysical array studies may reveal the cause of seafloor flattening2019

    • Author(s)
      Utada Hisashi
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 518 Pages: 100-107

    • DOI

      10.1016/j.epsl.2019.04.040

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Sharpness of the hemispherical boundary in the inner core beneath the northern Pacific2019

    • Author(s)
      Iritani Ryohei、Kawakatsu Hitoshi、Takeuchi Nozomu
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 527 Pages: 115796-115796

    • DOI

      10.1016/j.epsl.2019.115796

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Topography of the western Pacific LLSVP constrained by S-wave multipathing2019

    • Author(s)
      Roy Sunil K、Takeuchi Nozomu、Srinagesh D、Ravi?Kumar M、Kawakatsu Hitoshi
    • Journal Title

      Geophysical Journal International

      Volume: 218 Issue: 1 Pages: 190-199

    • DOI

      10.1093/gji/ggz149

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Numerical data of probabilistic 3D lithological map of Japanese crust2019

    • Author(s)
      Takeuchi Nozomu、Ueki Kenta、Iizuka Tsuyoshi、Nagao Jun、Tanaka Akiko、Enomoto Sanshiro、Shirahata Yutaka、Watanabe Hiroko、Yamano Makoto、Tanaka Hiroyuki
    • Journal Title

      Data in Brief

      Volume: 26 Pages: 104497-104497

    • DOI

      10.1016/j.dib.2019.104497

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Melting at the Edge of a Slab in the Deepest Mantle2019

    • Author(s)
      Thorne Michael S.、Takeuchi Nozomu、Shiomi Katsuhiko
    • Journal Title

      Geophysical Research Letters

      Volume: 46 Issue: 14 Pages: 8000-8008

    • DOI

      10.1029/2019gl082493

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High QScS beneath the Ontong Java Plateau2019

    • Author(s)
      Suetsugu Daisuke、Shiobara Hajime、Sugioka Hiroko、Ito Aki、Isse Takehi、Ishihara Yasushi、Tanaka Satoru、Obayashi Masayuki、Tonegawa Takashi、Yoshimitsu Junko、Kobayashi Takumi
    • Journal Title

      Earth, Planets and Space

      Volume: 71 Issue: 1 Pages: 1-9

    • DOI

      10.1186/s40623-019-1077-8

    • NAID

      120006733131

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characterization of Crustal and Uppermost‐Mantle Seismic Discontinuities in the Ontong Java Plateau2019

    • Author(s)
      Tonegawa T.、Miura S.、Ishikawa A.、Sano T.、Suetsugu D.、Isse T.、Shiobara H.、Sugioka H.、Ito A.、Ishihara Y.、Tanaka S.、Obayashi M.、Yoshimitsu J.、Kobayashi T.
    • Journal Title

      Journal of Geophysical Research: Solid Earth

      Volume: 124 Issue: 7 Pages: 7155-7170

    • DOI

      10.1029/2018jb016970

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Surface wave tomography for the Pacific Ocean incorporating seafloor seismic observations and plate thermal evolution2019

    • Author(s)
      Isse Takehi、Kawakatsu Hitoshi、Yoshizawa Kazunori、Takeo Akiko、Shiobara Hajime、Sugioka Hiroko、Ito Aki、Suetsugu Daisuke、Reymond Dominique
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 510 Pages: 116-130

    • DOI

      10.1016/j.epsl.2018.12.033

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] In-situ characterization of the lithosphere-asthenosphere system beneath NW Pacific Ocean via broadband dispersion survey with two OBS array2018

    • Author(s)
      Takeo, A., H. Kawakatsu, T. Isse, K. Nishida, H. Shiobara, H. Sugioka, A. Ito, H. Utada
    • Journal Title

      Geochemistry Geophysics Geosystem

      Volume: - Issue: 9 Pages: 3529-3539

    • DOI

      10.1029/2018gc007588

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A new fifth parameter for transverse isotropy III: reflection and transmission coefficients2018

    • Author(s)
      Kawakatsu Hitoshi
    • Journal Title

      Geophysical Journal International

      Volume: 213 Issue: 1 Pages: 426-433

    • DOI

      10.1093/gji/ggy003

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Sharp Structural Boundary in Lowermost Mantle Beneath Alaska Detected by Core Phase Differential Travel Times for the Anomalous South Sandwich Islands to Alaska Path2018

    • Author(s)
      Long Xin、Kawakatsu Hitoshi、Takeuchi Nozomu
    • Journal Title

      Geophysical Research Letters

      Volume: 45 Issue: 1 Pages: 176-184

    • DOI

      10.1002/2017gl075685

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hot upper mantle beneath the Tristan da Cunha Hotspot, from probabilistic Rayleigh-wave inversion and petrological modeling2018

    • Author(s)
      Bonadio, R., W. H. Geissler, S. Lebedev, J. Fullea, M. Ravenna, N. L. Celli, W. Jokat, M. Jegen, C. Sens-Schoenfelder, K. Baba
    • Journal Title

      Geochemistry, Geophysics, Geosystems

      Volume: 印刷中 Issue: 5 Pages: 1412-1428

    • DOI

      10.1002/2017gc007347

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The OJP array: seismological and electromagnetic observation on seafloor and islands in the Ontong Java Plateau2018

    • Author(s)
      Suetsugu, D., H. Shiobara, H. Sugioka, N. Tada, A. Ito, T. Isse, K. Baba, H. Ichihara, T. Ohta, Y. Ishihara, S. Tanaka, M. Obayashi, T. Tonegawa, J. Yoshimitsu, T. Kobayashi, H. Utada
    • Journal Title

      JAMSTEC Report of Research and Development

      Volume: 26 Issue: 0 Pages: 54-64

    • DOI

      10.5918/jamstecr.26.54

    • NAID

      130006725610

    • ISSN
      1880-1153, 2186-358X
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Analysis on microseism characteristics by typhoon ‘HAGIBIS’ using land and ocean-bottom seismometers2021

    • Author(s)
      Ji-won Ko, Tae-shin Kim, Park Ji-hoon, Oh Se-young, Sung-Joon Chang, Ki Young Kim Sr, Sang-Mook Lee Younghee Kim, Hisashi Utada, Hitoshi Kawakatsu, Hajime Shiobara, Takehi Isse and Nozomu Takeuchi
    • Organizer
      AGU 2021 fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seismic Velocity Structure of Upper Mantle Beneath the Oldest Pacific Ocean Basin: Insights from Finite-frequency Tomography2021

    • Author(s)
      H. Kang, Y.H. Kim, S.-H. Hung, P. Lin, T. Isse, H. Shiobara, H. Kawakatsu, S.-M. Lee, H. Utada, N. Takeuchi, H. Sugioka
    • Organizer
      AGU 2021 fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characteristics of Background Noise in OLDEST-1 Pacific Array Deployed in the Western Pacific2021

    • Author(s)
      Tae-shin Kim, Park Ji-hoon, Oh Se-young, Ji-won Ko, Sung-Joon Chang, Sang-Mook Lee, Younghee Kim, Hisashi Utada, Hitoshi Kawakatsu, Hajime Shiobara, Takehi Isse and Nozomu Takeuchi
    • Organizer
      AGU 2021 fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 表面波波形フィッティングによる海洋地殻および上部マントルのS波速度構造の推定ー 短周期成分を活用した初期モデルの構築 ー2021

    • Author(s)
      永井 はるか、竹内 希、川勝 均、塩原 肇、一瀬 建日、杉岡 裕子、伊藤 亜妃、歌田 久司
    • Organizer
      日本地震学会2021秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Surface wave envelope fitting for S wave velocity structure of the oceanic upper mantle2021

    • Author(s)
      永井 はるか、竹内 希、川勝 均、塩原 肇、一瀬 建日、杉岡 裕子、伊藤 亜妃、歌田 久司
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Seismic structure of the lithosphere-asthenosphere system beneath the oldest seafloor revealed by the broadband dispersion analysis of the Oldest-1 Array2021

    • Author(s)
      川野 由貴、一瀬 建日、竹尾 明子、川勝 均、塩原 肇、竹内 希、杉岡 裕子、Kim YoungHee、歌田 久司、Lee Sang-Mook
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Application of the wavefield decomposition for the Oldest-1 array data2021

    • Author(s)
      川勝 均、一瀬 建日、竹内 希、塩原 肇、杉岡 裕子、Kim YoungHee、歌田 久司、Lee Sang-Mook
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 海洋プレート冷却モデルが東北地方沈み込み帯の温度構造に与える影響2021

    • Author(s)
      森重学
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] MCMCを用いた表面波とレシーバー関数の解析による地震波鉛直異方性パラメタ の観測可能性の検証2021

    • Author(s)
      丸山純平, 川勝均, 竹内希
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] “ふつうの海洋マントル”を探して2021

    • Author(s)
      川勝均
    • Organizer
      InterRidge Japan 流体の地球科学:物理学-化学-地質学-生物学的研究からの統合的な展望
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Overview of the Pacific Array2021

    • Author(s)
      Hitoshi Kawakatsu
    • Organizer
      Pacific Array Workshop 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] lectrical conductivity structure of old oceanic mantle in the northwestern Pacific: Achievements for Normal Oceanic Mantle project2021

    • Author(s)
      Baba, K. T. Matsuno, N. Tada, H. Shimizu, and H. Utada
    • Organizer
      International Symposium on Deep Earth Exploration and Practices
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hawaii-Emperor Bending geometry gives chance to estimate mantle viscosity from integrated electrical resistivity, seismic velocity, and geodynamic simulation2021

    • Author(s)
      Baba, K. T. Isse, M. Jegen, M. Moorkamp, A. Schloemer, B. Steinberger, and HEB research group
    • Organizer
      Pacific Array Workshop 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On synthetic marine magnetotelluric inversion study: reproduction of error in data2021

    • Author(s)
      Baba, K
    • Organizer
      JpGU meeting 2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] Pacific Array updates 2021 spring: an international collaboration to image mantle dynamic processes across the Pacific basin2021

    • Author(s)
      Hitoshi Kawakatsu, James Gaherty, Hisashi Utada, Sang-Mook Lee, Young-Hee Kim, Zachary Eilon & International teams
    • Organizer
      IRIS Marine Seismology Symposium
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 西太平洋の古い海洋底下の3次元上部マントルS波速度構造2020

    • Author(s)
      一瀬建日・川勝均・塩原肇・竹内希・杉岡裕子・YoungHee Kim・歌田久司・ Sang-Mook Lee・吉澤和範
    • Organizer
      日本地震学会2020年度秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Seismic structure of the lithosphere-asthenosphere system beneath the oldest seafloor - the broadband dispersion analysis of the Oldest-1 (Pacific Array) data2020

    • Author(s)
      Y. Kawano, T. Isse, A. Takeo, H. Kawakatsu, H. Shiobara, N. Takeuchi, H. Sugioka, Y.-H. Kim, H. Utada, S.-M. Lee
    • Organizer
      AGU 2020 fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Three dimensional shear wave structure in the upper mantle beneath the oldest Pacific plate2020

    • Author(s)
      T. Isse, H. Kawakatsu, H. Shiobara, N. Takeuchi, H. Sugioka, Y.-H. Kim, H. Utada, S.-M. Lee, K. Yoshizawa
    • Organizer
      AGU 2020 fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Preliminary 1-D electrical conductivity structure of oldest oceanic mantle from magnetotelluric observation2020

    • Author(s)
      Kim H., Baba, K., Utada, H., Shimizu, H., Lee, S.M., Kawakatsu, H., Kim, Y.H., and Oldest-1 Science Team
    • Organizer
      AGU 2020 fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Upper Mantle P-wave Velocity Structure beneath the Oldest Pacific Ocean Basin from Finite-frequency P-wave Traveltime Tomography2020

    • Author(s)
      H. Kang, Y.H. Kim, S.-H. Hung, P. Lin, T. Isse, H. Shiobara, H. Kawakatsu, S.-M. Lee, H. Utada, N. Takeuchi, H. Sugioka
    • Organizer
      AGU 2020 fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The seismic structure of the oldest Pacific: Preliminary results from the broadband Rayleigh-wave dispersion analysis of the Pacific Array, Oldest-12020

    • Author(s)
      Y. Kawano, T. Isse, A. Takeo, H. Kawakatsu, H. Shiobara, N. Takeuchi, H. Sugioka, Y.-H. Kim, H. Utada, S.-M. Lee
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] Future geophysical observation on oceanic lithosphere and asthenosphere study: Hawaii-Emperor Bend (HEB) Project2020

    • Author(s)
      Baba, K., Steinberger, B., Jenen, M., Moorkamp, M., Isse T., Takeo, A., Schloemer, A., and HEB research group
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Topography on the mantle discontinuities beneath the Ontong Java Plateau2020

    • Author(s)
      D. Suetsugu, H. Shiobara, H. Sugioka, A. Ito, T. Isse, Y. Ishihara, S. Tanaka, M. Obayashi, T. Tonegawa, J. Yoshimitsu, T. Kobayashi
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The electrical conductivity structure of the oldest Pacific: Preliminary results from magnetotelluric observation data of Pacific Array, Oldest-12020

    • Author(s)
      Kim, H., Baba, K., Utada, H., Lee, S.M., Kawakatsu, H., Kim, Y.H.
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seismic velocity structure beneath the oldest region of the Pacific ocean basin from multiscale finite-frequency traveltime tomography2020

    • Author(s)
      H. Kang, Y.H. Kim, S.-H. Hung, P. Lin, T. Isse, H. Shiobara, H. Kawakatsu, S.-M. Lee, H. Utada, N. Takeuchi, H. Sugioka
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The Oldest Array: Japan-Korea Pacific Array collaboration to study the lithosphere-asthenosphere system below the oldest part of the Pacific Ocean2020

    • Author(s)
      Shiobara, H., Utada, H., Kim, S.S., Kim, Y.H., Baba, K., Isse, T., Kim H., Kim H., Sugioka, H., Takeuchi, N., Kawano, Y., Kawakatsu, H., Lee, S.M., and Onboard scientists of 2018/2019 Oldest cruises
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Three dimensional shear wave structure in the upper mantle beneath the oldest Pacific plate2020

    • Author(s)
      T. Isse, H. Kawakatsu, H. Shiobara, N. Takeuchi, H. Sugioka, Y.-H. Kim, H. Utada, S.-M. Lee, K. Yoshizawa
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Oldest Array (Pacific Array on the oldest seafloor), the first result2020

    • Author(s)
      Kawakatsu, H., Utada, H., Lee, S.M., Kim, Y.H., Shiobara, H., Takeuchi, N., Baba, K., Isse, T., Takeo, A., Kim, H.
    • Organizer
      EGU General Assembly 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pacific Array update 20202020

    • Author(s)
      Hitoshi Kawakatsu, and the international Pacific Array team
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] P Velocity Heterogeneities in the Upper Mantle beneath the Northwestern Pacific2020

    • Author(s)
      N. Takeuchi, H. Kawakatsu, H. Shiobara, T. Isse, H. Sugioka, A. Ito, H. Utada
    • Organizer
      JpGU-AGU joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New progress in building Pacific Array: an international collaboration to image mantle dynamic processes across the Pacific basin2019

    • Author(s)
      Kawakatsu, H.
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Unraveling Earth Interior from the Ocean2019

    • Author(s)
      Kawakatsu, H.
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Sharpness of the hemispherical boundary in the inner core beneath the northern Pacific2019

    • Author(s)
      Hitoshi Kawakatsu, Ryohei Iritani and Nozomu Takeuchi
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Receiver function imaging of the subducting Pacific plate beneath NE Japan using offshore and on land seismic arrays2019

    • Author(s)
      Kim HyeJeong, Kawakatsu Hitoshi
    • Organizer
      地震学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Receiver function imaging of subducting Pacific plate and mantle wedge under Japanese islands using denser network of stations2019

    • Author(s)
      HyeJeong Kim, Hitoshi Kawakatsu, Takeshi Akuhara, Masanao Shinohara
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 3D passive-source reverse-time migration imaging of mantle discontinuities2019

    • Author(s)
      Yang Shen, Jiahang Li, Hitoshi Kawakatsu
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Radial anisotropy in the upper mantle using multi-mode surface waves incorporating the ηκ parameter: Application to the Pacific and Australian regions2019

    • Author(s)
      Shuya Okuyama, Kazunori Yoshizawa, Hitoshi Kawakatsu, Takehi Isse
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] On the estimation of G discontinuity in the oceanic upper mantle using ScS reverberations2019

    • Author(s)
      Jumpei Maruyama, Hitoshi Kawakatsu, Nozomu Takeuchi
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Sharpness of the hemispherical boundary in the inner core beneath the northern Pacific2019

    • Author(s)
      Ryohei Iritani, Hitoshi Kawakatsu, Nozomu Takeuchi
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Noise reduction and surface wave array dispersion measurements applied to NOMan's broadband OBS data2019

    • Author(s)
      Yuki Kawano, Takehi Isse, Hitoshi Kawakatsu, Akiko Takeo, Hajime Shiobara
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Inversion of Longer Period OBS Waveforms for P Structures in the Oceanic Lithosphere and Asthenosphere2019

    • Author(s)
      Nozomu Takeuchi, Hitoshi Kawakatsu, Hajime Shiobara, Takehi Isse, Hiroko Sugioka, Aki Ito, Hisashi Utada
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New Constraints on Seismological Structures of the Oceanic Asthenosphere2019

    • Author(s)
      Nozomu Takeuchi, Hitoshi Kawakatsu, Hajime Shiobara,Takehi Isse, Hiroko Sugioka, Aki Ito, Hisashi Utada
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Array analysis of OBS recordings at Ontong Java Plateau: Preliminary analysis via seismic interferometry2019

    • Author(s)
      Y. Kawano, T. Isse, A. Takeo, H. Kawakatsu, D. Suetsugu, H. Shiobara, H. Sugioka, A. Ito, Y. Ishihara, S. Tanaka, M. Obayashi, T. Tonegawa, J. Yoshimitsu and T. Kobayashi
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] P-wave upper mantle structures beneath the Ontong Java Plateau, 2019 AGU fall meeting2019

    • Author(s)
      M. Obayashi, J. Yoshimitsu, D. Suetsugu, H. Shiobara, H. Sugioka, A. Ito, T. Isse, Y. Ishihara, S. Tanaka, T. Tonegawa and T. Kobayashi
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] オントンジャワ海台の上部マントルS波速度構造2019

    • Author(s)
      一瀬建日・末次大輔・塩原肇・杉岡裕子・伊藤亜妃・石川晃・川野由貴・吉澤和範・石原靖・田中聡・大林政行・利根川貴志・吉光淳子・小林拓史
    • Organizer
      地震学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Shear wave structure of the upper mantle beneath the Ontong Java Plateau2019

    • Author(s)
      T. Isse, D. Suetsugu, H. Shiobara, H. Sugioka, A. Ito, Y. Ishihara, S. Tanaka, M. Obayashi, T. Tonegawa, J. Yoshimitsu, T. Kobayashi, K. Yoshizawa
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Surface Wave Tomography for the Pacific Ocean Incorporating Seafloor Seismic Observations and Plate Thermal Evolution2019

    • Author(s)
      T. Isse, H. Kawakatsu, K. Yoshizawa, A. Takeo, H. Shiobara, H. Sugioka, A. Ito, D. Suetsugu, D. Reymond
    • Organizer
      IUGG 2019, Montreal
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Shear wave upper mantle structure beneath the Ontong Java Plateau2019

    • Author(s)
      T. Isse, D. Suetsugu, A. Ishikawa, H. Shiobara, H. Sugioka, A. Ito, Y. Kawano, 他7名
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New Era of Ocean Bottom Broadband Seismology with Penetrator System of the Autonomous BBOBS-NX (NX-2G)2019

    • Author(s)
      H. Shiobara, A. Ito, H. Sugioka, and M. Shinohara
    • Organizer
      IUGG 2019, Montreal
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 次世代観測へ向けた自律動作方式の高性能広帯域海底地震計:NX-2G2019

    • Author(s)
      塩原肇・伊藤亜妃・杉岡裕子・篠原雅尚
    • Organizer
      地震学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Self-consistent interpretation of magnetotelluric observations for understanding the nature of oceanic lithosphere and asthenosphere2019

    • Author(s)
      Baba, K., and Utada, H.
    • Organizer
      AGU(アメリカ地球物理連合)Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The Oldest Array: Japan-Korea collaboration to study the lithosphere asthenosphere system below the oldest part of the Pacific Ocean2019

    • Author(s)
      Shiobara, H., Utada, H., Kim, S.S., Baba, K., Isse, T., Takeuchi, N., Kim, H., Kawakatsu, H. Kim, Y., and Lee, S.M.
    • Organizer
      IUGG 2019, Montreal
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 海底MTアレイデータを用いた海洋上部マントルの一次元異方性電気伝導度構造の推定2019

    • Author(s)
      松野哲男, 馬場聖至, 歌田久司
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Examination of criteria to remove the influence of the Sq-field variations from electromagnetic field spectra for a better estimation of regional electromagnetic responses2019

    • Author(s)
      Li, R., 清水久芳, 馬場聖至, 歌田久司
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Determination of Intrinsic Attenuation in the Oceanic Lithosphere-Asthenosphere System2018

    • Author(s)
      N. Takeuchi, H. Kawakatsu, H. Shiobara, T. Isse, H. Sugioka, A. Ito & H. Utada
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] P波波形を用いた海洋アセノスフェアの構造推定2018

    • Author(s)
      竹内 希・川勝 均・塩原 肇・一瀬建日・杉岡裕子・伊藤亜妃・歌田久司
    • Organizer
      日本地震学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] The First Data of the Autonomous BBOBS-NX (NX-2G) for New Era of Ocean Bottom Broadband Seismology2018

    • Author(s)
      H. Shiobara, A. Ito, H. Sugioka, M. Shinohara
    • Organizer
      AGU Fall Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Unexpected consequences of transverse isotropy2018

    • Author(s)
      Kawakatsu, H.
    • Organizer
      EGU General Assembly
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Surface wave tomography for the Pacific Ocean incorporating seafloor seismic observations and its age-dependence2018

    • Author(s)
      T. Isse, H. Kawakatsu, K. Yoshizawa, A. Takeo, H. Shiobara, H. Sugioka, A. Ito, D. Suetsugu, D. Reymond
    • Organizer
      AGU Fall Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Upper mantle structure beneath the Pacific Ocean revealed from seafloor and land broadband seismic observations2018

    • Author(s)
      T. Isse, H. Kawakatsu, K. Yoshizawa, A. Takeo, H. Shiobara, H. Sugioka, A. Ito, D. Suetsugu
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Lateral heterogeneity of nominally 'normal' oceanic upper mantle in the northwestern Pacific2018

    • Author(s)
      多田訓子・馬場聖至・歌田久司
    • Organizer
      第144回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Marine magnetotelluric data supports melt at the LAB as the origin of the petit-spot in the northwestern Pacific2018

    • Author(s)
      Baba, K., N. Abe, N. Hirano, and M. Ichiki
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Electrical feature supports the melt in the lithosphere-asthenosphere boundary as the origin of the petit-spot in northwestern Pacific2018

    • Author(s)
      Baba, K., N. Abe, N. Hirano, and M. Ichiki
    • Organizer
      EGU General Assembly
    • Related Report
      2018 Annual Research Report
  • [Presentation] Shear wave upper mantle structure beneath the Ontong Java Plateau2018

    • Author(s)
      T. Isse, D. Suetsugu, H. Shiobara, H. Sugioka, A. Ito, Y. Ishihara, S. Tanaka, M. Obayashi, T. Tonegawa, J. Yoshimitsu, T. Kobayashi
    • Organizer
      日本地球惑星科学連合大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 広帯域海底地震計鉛直成分のノイズ除去による表面波アレイ計測2018

    • Author(s)
      川野由貴・一瀬建日・川勝均・塩原肇
    • Organizer
      日本地震学会
    • Related Report
      2018 Annual Research Report
  • [Book] 図説地球科学の事典2018

    • Author(s)
      鳥海光弘、入舩徹男、岩森光、ウォリスサイモン、小平秀一、小宮剛、阪口秀、鷺谷威、末次大輔、中川貴司、宮本英昭(分担執筆:歌田久司、一瀬健日、末次大輔、馬場聖至)
    • Total Pages
      248
    • Publisher
      朝倉書店
    • ISBN
      9784254160727
    • Related Report
      2018 Annual Research Report
  • [Remarks] Pacific Array

    • URL

      http://eri-ndc.eri.u-tokyo.ac.jp/PacificArray/

    • Related Report
      2019 Annual Research Report
  • [Remarks] 太平洋アレイ

    • URL

      http://eri-ndc.eri.u-tokyo.ac.jp/PacificArray/index_j.html

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
  • [Remarks] Pacific Array

    • URL

      http://eri-ndc.eri.u-tokyo.ac.jp/PacificArray/index.html

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] Pacific Array Workshop 20212021

    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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