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Development of multi-scale observation techniques for monitoring slow-to-fast earthquakes

Planned Research

Project AreaScience of Slow to Fast Earthquakes
Project/Area Number 21H05204
Research Category

Grant-in-Aid for Transformative Research Areas (A)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (II)
Research InstitutionThe University of Tokyo

Principal Investigator

田中 愛幸  東京大学, 大学院理学系研究科(理学部), 准教授 (90508350)

Co-Investigator(Kenkyū-buntansha) 吉田 真人  東北大学, 電気通信研究所, 准教授 (10333890)
新谷 昌人  東京大学, 地震研究所, 教授 (30272503)
横田 裕輔  東京大学, 生産技術研究所, 准教授 (30840540)
大久保 慎人  高知大学, 教育研究部自然科学系理工学部門, 准教授 (50462940)
塩原 肇  東京大学, 地震研究所, 教授 (60211950)
荒木 英一郎  国立研究開発法人海洋研究開発機構, 海域地震火山部門(地震津波予測研究開発センター), グループリーダー (60359130)
葛西 恵介  東北大学, 電気通信研究所, 准教授 (80534495)
青木 陽介  東京大学, 地震研究所, 准教授 (90376624)
板場 智史  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, 主任研究員 (90589285)
Project Period (FY) 2021-09-10 – 2026-03-31
Project Status Granted (Fiscal Year 2025)
Budget Amount *help
¥303,810,000 (Direct Cost: ¥233,700,000、Indirect Cost: ¥70,110,000)
Fiscal Year 2025: ¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000)
Fiscal Year 2024: ¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2023: ¥89,960,000 (Direct Cost: ¥69,200,000、Indirect Cost: ¥20,760,000)
Fiscal Year 2022: ¥20,540,000 (Direct Cost: ¥15,800,000、Indirect Cost: ¥4,740,000)
Fiscal Year 2021: ¥147,680,000 (Direct Cost: ¥113,600,000、Indirect Cost: ¥34,080,000)
Keywordsスロー地震 / 重力 / ファイバセンシング / 海底地震観測 / 海底地殻変動観測
Outline of Research at the Start

光計測および海中海底工学を取り入れることで、既存の観測手法では困難だった高い時空間分解能で効率的に地震関連現象に伴う変形と重力変化を計測する技術を開発する。開発した技術を実際の地球物理学的フィールドに適用し、地震現象が定常時からカタストロフィへ遷移するプロセスの詳細把握を実現する。具体的には、①重力計測、②光ファイバー計測、③海底計測によって地殻流体移動に伴う重力変化を詳細に捉えるとともに、地殻変動・Slow地震・通常の地震という低速から高速の現象に対しこれまで観測できなかった帯域を含む、広い領域にわたる継ぎ目のない観測「マルチスケール観測」を実施することで、それらの現象の実態を明らかにする。

Outline of Annual Research Achievements

広帯域にわたり空間的に継ぎ目なく地震現象を捉えるマルチスケール観測の実現のため、以下の3つの技術開発を行った。
1.重力計測グループでは、東大地震研がこれまでに開発した小型絶対重力計の装置(落下装置、光学ユニット、振動計測部)2セットを用いて、東北大と共同で安定化したレーザ信号を多重化した基礎実験を行った。東大理学部は、流体移動により生じる重力変化のモデルを構築し、能登半島における重力観測の結果を流体移動で説明することに成功した。
2.ファイバ計測グループでは、海洋研究開発機構が、前年度までに開発した2台の測器(TW-COTDRおよびTGD-DAS)を複数のフィールドに設置し、温度・歪の分離も含めた試験観測を実施した。産総研・高知大・東大地震研は、広帯域地震計・孔内傾斜計・歪計等の既存地震・地殻変動観測技術との比較検討を公募研究も含めて共同で行った。
3.海底計測グループは、東大地震研は、昨年度までに開発した超深海用海底地震計を用いて、2600m水深の海底で試験観測を実施した。2025年度中に回収し、機能実証を完了する予定である。東大生産研は、昨年度、試験観測を成功させたUAVを用いて、地殻変動の検出に向け機体・装置開発、実地試験を行った。
今年度は、海底計測に関わる複数の国際ワークショップにおいて、ファイバ計測グループおよび海底計測グループの成果発表が基調講演を含み、口頭で行われた。
以上に加え、流体が群発地震活動を誘発していると考えられる能登半島において、B02班の公募研究者と共同でファイバ計測及び重力観測を継続した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

3グループとも当初計画に基づき、研究開発を順調に進めている

Strategy for Future Research Activity

1.重力計測グループでは、東大地震研・東北大・東大理学部が、これまでに開発しテストを行った安定化レーザ信号を共有し、多点同時重力観測を実施する。
2.ファイバ計測グループは、海洋研究開発機構が、開発した測器の観測対象を広げるための改良を行うとともに、複数の実フィールドにおける試験観測を継続する。産総研・高知大・東大地震研は、広帯域地震計・孔内傾斜計・歪計等の既存地震・地殻変動観測技術との比較検討を公募研究も含めて共同して行う。
3.海底計測グループでは、東大地震研は、昨年度、試験観測を開始した超深海用海底地震計を回収して機能実証を完了するとともに、実際の超深海の海域での試験を行う。東大生産研はUAVを用いた地殻変動の検出に向けた機体・装置開発、実地試験を継続する。

Report

(4 results)
  • 2024 Annual Research Report
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (167 results)

All 2025 2024 2023 2022 2021 Other

All Int'l Joint Research (12 results) Journal Article (26 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 25 results,  Open Access: 23 results) Presentation (127 results) (of which Int'l Joint Research: 73 results,  Invited: 14 results) Remarks (2 results)

  • [Int'l Joint Research] ISTerre(フランス)

    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] University of Southampton(英国)

    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] Nanyang Technological University(シンガポール)

    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] China Earthquake Administration/Hohai University(中国)

    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] ISTerre(フランス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] GFZ地球科学センター(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ダブリン高等研究所(アイルランド)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] GeoForschungsZentrum(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Dublin Institute for Advanced Studies(アイルランド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Scripps Institution of Oceanography(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] GeoForschungsZentrum(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Dublin Institute for Advanced Studies(アイルランド)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Coseismic Slip and Early Afterslip of the 2024 Hyuganada Earthquake Modulated by a Subducted Seamount2025

    • Author(s)
      Itoh Yuji
    • Journal Title

      Geophysical Research Letters

      Volume: 52 Issue: 2

    • DOI

      10.1029/2024gl112826

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Slip‐Tremor Interaction at the Very Beginning of Episodic Tremor and Slip in Cascadia2025

    • Author(s)
      Itoh Yuji、Socquet Anne、Radiguet Mathilde
    • Journal Title

      AGU Advances

      Volume: 6 Issue: 2

    • DOI

      10.1029/2024av001425

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Model selection for the sound speed perturbation of GNSS-A using the widely applicable Bayesian information criterion (WBIC)2025

    • Author(s)
      Watanabe Shun-ichi、Ishikawa Tadashi、Nakamura Yuto、Yokota Yusuke
    • Journal Title

      Earth, Planets and Space

      Volume: 77 Issue: 1 Pages: 23-23

    • DOI

      10.1186/s40623-025-02144-6

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A possibility of fluid migration due to the 2023 M6.5 Noto Peninsula earthquake suggested from precise gravity measurements2025

    • Author(s)
      Tanaka Yoshiyuki、Nishiyama Ryuichi、Araya Akito、Sakaue Hiromu、Nakakoji Kazuma、Takata Taisei、Nishimura Takuya、Hiramatsu Yoshihiro、Sawada Akihiro
    • Journal Title

      Earth, Planets and Space

      Volume: 77 Issue: 1 Pages: 1-32

    • DOI

      10.1186/s40623-025-02153-5

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Slow rupture in a fluid-rich fault zone initiated the 2024 <i>M</i> <sub>w</sub> 7.5 Noto earthquake2024

    • Author(s)
      Ma Zhangfeng、Zeng Hongyu、Luo Haipeng、Liu Zemin、Jiang Yu、Aoki Yosuke、Wang Weitao、Itoh Yuji、Lyu Mingzhe、Cui Yan、Yun Sang-Ho、Hill Emma M.、Wei Shengji
    • Journal Title

      Science

      Volume: 385 Issue: 6711 Pages: 866-871

    • DOI

      10.1126/science.ado5143

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A physical explanation for an unusually long-duration slow slip event in the Nankai Trough2024

    • Author(s)
      Ariyoshi Keisuke、Nagano Akira、Hasegawa Takuya、Iinuma Takeshi、Nakano Masaru、Saffer Demian Michael、Matsumoto Hiroyuki、Yada Shuichiro、Araki Eiichiro、Takahashi Narumi、Hori Takane、Kodaira Shuichi
    • Journal Title

      Tectonophysics

      Volume: 887 Pages: 230439-230439

    • DOI

      10.1016/j.tecto.2024.230439

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Acoustic ambiguity reduction (AAR) method: an acoustic signal identification method for GNSS-A observation considering instrumental signal distortion2024

    • Author(s)
      Yokota Yusuke、Ishikawa Tadashi、Nagae Koya、Watanabe Shun-ichi、Nakamura Yuto、Kouno Kenji、Yoshizumi Yuto
    • Journal Title

      Earth, Planets and Space

      Volume: 76 Issue: 1 Pages: 97-97

    • DOI

      10.1186/s40623-024-02050-3

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quantitative identification of causes of instrumental acoustic signal distortion in Global Navigation Satellite System?Acoustics Combination observations2024

    • Author(s)
      Yoshizumi Yuto、Yokota Yusuke、Ishikawa Tadashi、Nagae Koya、Watanabe Shun-ichi、Nakamura Yuto、Kouno Kenji
    • Journal Title

      The Journal of the Acoustical Society of America

      Volume: 155 Issue: 4 Pages: 2786-2793

    • DOI

      10.1121/10.0025770

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 衛星重力観測で捉えられた巨大地震数カ月前の重力変化(解説)2024

    • Author(s)
      田中愛幸
    • Journal Title

      地震ジャーナル

      Volume: 77 Pages: 69-75

    • Related Report
      2024 Annual Research Report
    • Open Access
  • [Journal Article] Classification of images derived from submarine fibre optic sensing: detecting broadband seismic activity from hydroacoustic signals2024

    • Author(s)
      Matthaiou Ioannis、Masoudi Ali、Araki Eiichiro、Kodaira Shuichi、Modafferi Stefano、Brambilla Gilberto
    • Journal Title

      Geophysical Journal International

      Volume: 240 Issue: 1 Pages: 483-501

    • DOI

      10.1093/gji/ggae400

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Representation and interpretation about underwater sound speed gradient field in the GNSS-A observation2024

    • Author(s)
      Yokota Yusuke、Ishikawa Tadashi、Watanabe Shun-ichi、Nakamura Yuto、Nagae Koya
    • Journal Title

      Geophysical Journal International

      Volume: 237 Issue: 2 Pages: 902-915

    • DOI

      10.1093/gji/ggae083

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cooperative Ocean Survey Method by a UAV and an AUV: State Estimation of the AUV Based on the UAV2023

    • Author(s)
      Matsuda Takumi、Yokota Yusuke
    • Journal Title

      Marine Technology Society Journal

      Volume: 57 Issue: 4 Pages: 24-33

    • DOI

      10.4031/mtsj.57.4.5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evidence of a Transient Aseismic Slip Driving the 2017 Valparaiso Earthquake Sequence, From Foreshocks to Aftershocks2023

    • Author(s)
      Moutote Luc、Itoh Yuji、Lengline Olivier、Duputel Zacharie、Socquet Anne
    • Journal Title

      Journal of Geophysical Research: Solid Earth

      Volume: 128 Issue: 9

    • DOI

      10.1029/2023jb026603

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Full-Bayes GNSS-A solutions for precise seafloor positioning with single uniform sound speed gradient layer assumption2023

    • Author(s)
      Watanabe Shun-ichi、Ishikawa Tadashi、Nakamura Yuto、Yokota Yusuke
    • Journal Title

      Journal of Geodesy

      Volume: 97 Issue: 10

    • DOI

      10.1007/s00190-023-01774-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Largest Aftershock Nucleation Driven by Afterslip During the 2014 Iquique Sequence2023

    • Author(s)
      Itoh Yuji、Socquet Anne、Radiguet Mathilde
    • Journal Title

      Geophysical Research Letters

      Volume: 50 Issue: 24

    • DOI

      10.1029/2023gl104852

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Observation of Shallow Slow Earthquakes by Distributed Acoustic Sensing Using Offshore Fiber‐Optic Cable in the Nankai Trough, Southwest Japan2023

    • Author(s)
      Baba Satoru、Araki Eiichiro、Yamamoto Yojiro、Hori Takane、Fujie Gou、Nakamura Yasuyuki、Yokobiki Takashi、Matsumoto Hiroyuki
    • Journal Title

      Geophysical Research Letters

      Volume: 50 Issue: 12

    • DOI

      10.1029/2022gl102678

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] An Estimate of the Effect of 3D Heterogeneous Density Distribution on Coseismic Deformation Using a Spectral Finite-Element Approach2023

    • Author(s)
      Tanaka Yoshiyuki, Klemann Volker, Martinec Zdenek
    • Journal Title

      International Association of Geodesy Symposia

      Volume: - Pages: 103-111

    • DOI

      10.1007/1345_2023_236

    • ISBN
      9783031553592, 9783031553608
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A combination of tides and nontidal variations in ocean bottom pressure may generate interannual slip fluctuations in the transition zone along a subduction plate interface2023

    • Author(s)
      Tanaka Yoshiyuki、Sakaue Hiromu、Kano Masayuki、Yabe Suguru
    • Journal Title

      Geodesy and Geodynamics

      Volume: 14 Issue: 1 Pages: 43-51

    • DOI

      10.1016/j.geog.2022.09.001

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental verification of seafloor crustal deformation observations by UAV-based GNSS-A2023

    • Author(s)
      Yokota Y, Kaneda M, Hashimoto T, Yamaura S, Kouno K, Hirakawa Y
    • Journal Title

      scientific reports

      Volume: 4105 Issue: 1

    • DOI

      10.1038/s41598-023-31214-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Frictional and Hydraulic Properties of Plate Interfaces Constrained by a Tidal Response Model Considering Dilatancy/Compaction2022

    • Author(s)
      Sakamoto, R. and Y. Tanaka
    • Journal Title

      J. Geophys. Res. (Solid Earth)

      Volume: 127 Issue: 8

    • DOI

      10.1029/2022jb024112

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Imaging evolution of Cascadia slow-slip event using high-rate GPS2022

    • Author(s)
      Itoh, Y., Aoki, Y., & Fukuda, J.
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1

    • DOI

      10.1038/s41598-022-10957-8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Temporal change of km-scale underwater sound speed structure and GNSS-A positioning accuracy2022

    • Author(s)
      Y. Yokota, S. Watanabe, T. Ishikawa, Y. Nakamura
    • Journal Title

      Earth and Space Science

      Volume: - Issue: 12

    • DOI

      10.1029/2022ea002224

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Extension of Aseismic Slip Propagation Theory to Slow Earthquake Migration2022

    • Author(s)
      Ariyoshi Keisuke
    • Journal Title

      Journal of Geophysical Research: Solid Earth

      Volume: 127 Issue: 7

    • DOI

      10.1029/2021jb023800

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On the performance of position-domain sidereal filter for 30-s kinematic GPS to mitigate multipath errors2022

    • Author(s)
      Itoh Yuji、Aoki Yosuke
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1 Pages: 23-23

    • DOI

      10.1186/s40623-022-01584-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Extraction of P Wave From Ambient Seafloor Noise Observed by Distributed Acoustic Sensing2022

    • Author(s)
      Tonegawa T.、Araki E.、Matsumoto H.、Kimura T.、Obana K.、Fujie G.、Arai R.、Shiraishi K.、Nakano M.、Nakamura Y.、Yokobiki T.、Kodaira S.
    • Journal Title

      Geophysical Research Letters

      Volume: 49 Issue: 4

    • DOI

      10.1029/2022gl098162

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Crustal deformation detection capability of the GNSS-A seafloor geodetic observation array (SGO-A), provided by Japan Coast Guard2021

    • Author(s)
      Yokota Y, Ishikawa T, Watanabe S, Nakamura Y
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 8 Issue: 1

    • DOI

      10.1186/s40645-021-00453-4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Measuring wide dynamic range behavior of the seismogenic plate margin by optical fiber strain.2025

    • Author(s)
      Eiichiro Araki
    • Organizer
      IEEE UnderwaterTechnology 2025
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Observation of shallow slow slip events and slow earthquakes with seafloor fiber strain and seafloor borehole observatories in the Nankai Trough.2025

    • Author(s)
      Eiichiro Araki, Takashi Yokobiki, Yuya Machida, Mark Zumberge , Hiroyuki Matsumoto, Shuhei Nishida, Shuhei Tsuji, Satoru Baba
    • Organizer
      Ocean Floor Observation Technology Workshop
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Distributed optical fiber sensing in scientific deep seafloor borehole observatory in the Nankai Trough2025

    • Author(s)
      Eiichiro Araki, Takashi Yokobiki, Yuya Machida, Shuhei Tsuji
    • Organizer
      IEEE UnderwaterTechnology 2025
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of slow and regular earthquakes using distributed acoustic sensing and offshore seismic network in the Nankai subduction zone, southwest Japan2025

    • Author(s)
      Satoru Baba and Eiichiro Araki
    • Organizer
      SZNet Ocean Floor Observational Technology Workshop
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of GNSS-A technology and sea surface observation platforms2025

    • Author(s)
      Yusuke Yokota
    • Organizer
      SZNet Ocean Floor Observational Technology Workshop
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 南海トラフ海底・海底掘削孔内光ファイバ網によるリアルタイム地震・地殻変動観測2025

    • Author(s)
      荒木英一郎
    • Organizer
      国土セイフティネットシンポジウム
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Fiber optic strain sensing networks in the seafloor and the deep seafloor borehole in Nankai Trough subduction zone2024

    • Author(s)
      Eiichiro Araki , Masataka Kinoshita , Takashi Yokobiki , Shuhei Nishida , Yuya Machida , Hiroyuki Matsumoto , Shuhei Tsuji , and Satoru Baba
    • Organizer
      AGU2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rapid Rayleigh scattered wave frequency analysis in distributed optical fiber sensing for broadband geophysical observation in the seafloor.2024

    • Author(s)
      Eiichiro Araki and Takashi Yokobiki
    • Organizer
      Galileo conference: Fibre Optic Sensing in Geosciences,
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rayleigh Scattered Wave Analysis Techniques in Distributed Optical Fiber Sensing for Broadband Geophysical Observation in the Seafloor.2024

    • Author(s)
      Eiichiro Araki, Takashi Yokobiki, Hiroyuki Matsumoto
    • Organizer
      Photonic Seismology: Lighting the Way Forward,
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New real-time seafloor borehole observatory at C9038B in the Nankai Trough for shallow Slow Slip Event observation in the Nankai Trough.2024

    • Author(s)
      Eiichiro Araki, Yuya Machida, Takashi Yokobiki, Shuhei Tsuji, Hiroyuki Matsumoto , Shuhei Nishida, Satoru Baba, Kan Aoike, Yasuyuki Nakamura, Keisuke Ariyoshi, Takane Hori, and Shuichi Kodaira
    • Organizer
      日本地球惑星科学連合2024年大会
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Co- and post-seismic gravitational change of the M9 2011 Tohoku earthquake from GRACE observation and viscoelastic deformation theory2024

    • Author(s)
      Ge L, Tanaka Y, Nakakoji K
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simulation Analysis of GNSS-A Sound Speed Field Estimation: Effects of Survey lines and Seafloor Array Configurations2024

    • Author(s)
      Ming Z, Yokota Y
    • Organizer
      海洋調査技術学会第35回研究成果発表会
    • Related Report
      2024 Annual Research Report
  • [Presentation] GNSS-A observation instruments of Japan Coast Guard and the new acoustic signal reading method; Acoustic Ambiguity Reduction Method2024

    • Author(s)
      Nagae K, Yokota Y, Watanabe S, Ishikawa T, Nakamura Y
    • Organizer
      AGU Fall Meeting 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Time series of the GNSS-A seafloor positioning at SGO-A sites applying the acoustic ambiguity reduction (AAR) method2024

    • Author(s)
      Nagae Y, Yokota Y, Watanabe S, Ishikawa T, Nakamura Y
    • Organizer
      Slow2Fast Earthquake Workshop 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The effects of a nonlinear rheology on postseismic gravity changes2024

    • Author(s)
      Nakakoji K, Tanaka Y, Klemann V, Martinec Z
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of a calculation method for viscoelastic relaxation incorporating nonlinear rheology in a self-gravitating spherical Earth model2024

    • Author(s)
      Nakakoji K, Tanaka Y, Klemann V, Martinec Z
    • Organizer
      EGU 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Triggered tremor activity off the Cape Muroto observed by distributed acoustic sensing after the 2024 M7.6 Noto Peninsula earthquake2024

    • Author(s)
      Satoru Baba and Eiichiro Araki
    • Organizer
      日本地球惑星科学連合2024年大会
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seismic activity monitoring using DONET and distributed acoustic sensing data in the Nankai Trough, southwest Japan2024

    • Author(s)
      Satoru Baba, Eiichiro Araki, Akiko Toh, Ryoichiro Agata
    • Organizer
      2024 AGU Fall Meeting
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Monitoring of fast and slow earthquakes using DONET and distributed acoustic sensing data in the Nankai Trough, southwest Japan2024

    • Author(s)
      Satoru Baba, Eiichiro Araki, Akiko Toh, Ryoichiro Agata, Ayako Nakanishi
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gravity changes during earthquake cycles2024

    • Author(s)
      Tanaka Y
    • Organizer
      2024 Workshop on astrophysics and geophysics using superconducting gravimeters and the 1st ENIGMA collaboration meeting
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Improved GNSS-A time series with the Acoustic Ambiguity Reduction method applied to the Japan Coast Guard’s SGO-A sites using GARPOS-MCMC2024

    • Author(s)
      Watanabe S, Nagae K, Yokota Y, Ishikawa T, Nakamura Y
    • Organizer
      AGU Fall Meeting 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Time series of the GNSS-A seafloor positioning at SGO-A sites applying the acoustic ambiguity reduction (AAR) method2024

    • Author(s)
      Watanabe S, Nagae K, Yokota Y, Ishikawa T, Nakamura Y
    • Organizer
      Slow2Fast Earthquake Workshop 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development and Demonstration Experiments of the HAMADORI Seaplane UAV2024

    • Author(s)
      Yamaura S, Kyo M, Yokota Y, Shimizu H, Fujii T, Suzuki K, Kaneda M
    • Organizer
      OCEANS 2024 Singapore
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Oceanographic application of seafloor geodesy: Understanding internal waves through GNSS-A oceanography2024

    • Author(s)
      Yokota Y, Ishikawa T, Watanabe S, Nakamura Y, Nagae K
    • Organizer
      AGU Fall Meeting 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Detection of shallow SSEs in the Nankai Trough by SGO-A until 20242024

    • Author(s)
      Yokota Y, Ishikawa T, Watanabe S, Nakamura Y, Nagae Y
    • Organizer
      Slow2Fast Earthquake Workshop 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A possibility of fluid migration due to the 2023 M6.5 Noto Peninsula earthquake suggested from precise gravity measurement2024

    • Author(s)
      Yoshiyuki Tanaka, Ryuichi Nishiyama, Akito Araya, Hiromu Sakaue, Kazuma Nakakoji, Taisei Takata, Takuya Nishimura, Yoshihiro Hiramatsu, Akihiro Sawada
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on the degradation of acoustic waveforms used for GNSS-A observations2024

    • Author(s)
      Yoshizumi Y, Yokota Y, Ishikawa T, Nagae K, Watanabe S, Nakamura Y, Kouno K
    • Organizer
      OCEANS 2024 Singapore
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluating the observation performance of the seaplane-type UAV based system in GNSS-A2024

    • Author(s)
      Yoshizumi Y, Yokota Y, Kaneda M, Yamaura S, Kameta Y, Inoue T, Kouno K
    • Organizer
      Slow2Fast Earthquake Workshop 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水槽実験から見るSGO-A観測の音響測距波形の特徴2024

    • Author(s)
      永江航也, 横田裕輔, 石川直史, 渡邉俊一, 中村優斗, 吉住優憧, 井上智裕, 河野賢司, 飯沼卓史
    • Organizer
      一般社団法人電子情報通信学会信学技報
    • Related Report
      2024 Annual Research Report
  • [Presentation] 超深海域での広帯域地震観測へ向けた海底地震計 (UDBBOBS) の開発2024

    • Author(s)
      塩原肇・伊藤亜妃・杉岡裕子・篠原雅尚
    • Organizer
      日本地震学会2024年度秋季大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] GNSS-A海底地殻変動観測によって副次的に検知される内部波2024

    • Author(s)
      横田裕輔, 石川直史, 渡邉俊一, 永江航也, 中村優斗
    • Organizer
      日本海洋学会2024年度秋季大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 2011年M9東北沖地震における地震時および地震後の重力変化パターン:GRACE観測と粘弾性変位理論に基づいて2024

    • Author(s)
      葛莉麗,田中愛幸
    • Organizer
      日本測地学会第142回講演会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 水槽実験によるGNSS-A観測に用いられる音響信号の特性評価2024

    • Author(s)
      吉住優憧, 永江航也, 横田裕輔, 石川直史, 渡邉俊一, 中村優斗, 井上智裕, 河野賢司, 飯沼卓史
    • Organizer
      一般社団法人電子情報通信学会信学技報
    • Related Report
      2024 Annual Research Report
  • [Presentation] 飛行艇型無人航空機によるGNSS-A観測の実証2024

    • Author(s)
      吉住優憧, 横田裕輔, 金田政太, 山浦秀作, 亀田友里, 井上智裕, 河野賢司
    • Organizer
      日本測地学会第142回講演会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 実海域試験を通したUAVベースのGNSS-A観測システムのスペック評価2024

    • Author(s)
      吉住優憧, 横田裕輔, 金田政太, 山浦秀作, 橋本武憲, 井上智裕, 河野賢司
    • Organizer
      日本地球惑星科学連合2024年大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] GNSS-A 観測に用いられる音響波形劣化の原因の特定2024

    • Author(s)
      吉住優憧, 横田裕輔, 石川直史, 永江航也, 渡邉俊一, 中村優斗, 河野賢司
    • Organizer
      海洋音響学会2024年度研究発表会講演論文集
    • Related Report
      2024 Annual Research Report
  • [Presentation] 南海トラフ地震発生帯での歪による広域・リアルタイム地殻活動把握の取り組み2024

    • Author(s)
      荒木 英一郎、横引 貴史 、町田 祐弥 、木下 正高 、松本 浩幸 、辻 修平 、馬場 慧 、西田 周平 、有吉 慶介 、堀 高峰
    • Organizer
      日本地震学会2024年度秋季大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 「リアルタイム長期観測手法を用いた防災研究」その未来2024

    • Author(s)
      荒木英一郎, 横引貴史, 松本浩幸, 西田周平, 町田祐弥, 辻修平, 馬場慧
    • Organizer
      海洋理工学会 2024 創設30周年記念講演
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 海底の歪・温度・水圧分布光ファイバーセンシング用ケーブルの開発2024

    • Author(s)
      荒木英一郎, 横引貴史, 辻修平, 西田周平, 松本浩幸
    • Organizer
      日本地球惑星科学連合2024年大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 人工衛星重力ミッション高度化へ向けた、非線形レオロジーを考慮した粘弾性変形理論の開発(II):Nonlinear Burgers modelへの拡張2024

    • Author(s)
      中小路一真, 田中愛幸, Volker Klemann, Zdenek Martinec
    • Organizer
      日本測地学会第142回講演会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 2023年5月5日のM6.5奥能登地震に伴う重力変化2024

    • Author(s)
      田中愛幸, 西山竜一, 新谷昌人, 坂上啓, 中小路一真, 高田大成, 西村卓也, 平松良浩, 澤田明宏
    • Organizer
      日本測地学会第142回講演会
    • Related Report
      2024 Annual Research Report
  • [Presentation] DONETと分布型音響センシングのデータを用いた南海トラフにおける地震・スロー地震の自動解析2024

    • Author(s)
      馬場慧・荒木英一郎・藤亜希子・縣亮一郎・仲西理子
    • Organizer
      日本地震学会2024年度秋季大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Gravity anomaly in the slow slip area along the southern Ryukyu subduction zone captured by continuous parallel observation using two gPhoneX gravimeters2024

    • Author(s)
      Yoshiyuki Tanaka, Yuichi Hiramatsu, Hiromu Sakaue, Akio Kobayashi and Tadahiro Tsuyuki
    • Organizer
      AGU Fall Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Shallow tremor activity observed by distributed acoustic sensing in 2022 and 2024 off the Cape Muroto, southwest Japan2024

    • Author(s)
      Baba, S., & Araki, E.
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2024, Mexico
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 能登半島北東部における重力観測結果2023

    • Author(s)
      田中愛幸,西山竜一,新谷昌人,堀田耕平,坂上啓, 押田真紀,高田大成,中小路一真,西村卓也,平松良浩,澤田明宏
    • Organizer
      「2023年5月5日の地震を含む能登半島北東部陸海域で継続する地震と災害の総合調査」研究集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Terrestrial and satellite gravity observations of earthquake-related phenomena -an overview2023

    • Author(s)
      Yoshiyuki Tanaka
    • Organizer
      1st Workshop on Earthquake Early Detection using Superconducting Gravimetry
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A theoretical estimation of the effects of self-gravitation on posteruptive viscoelastic deformation2023

    • Author(s)
      "Yoshiyuki Tanaka, Naoki Kaneko, Volker Klemann, and Zdenek Martinec "
    • Organizer
      28th IUGG General Assembly
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Restart of the ultra-deep “broadband" OBS (UDBBOBS) development2023

    • Author(s)
      Hajime Shiobara, Aki Ito, Hiroko Sugioka, Masanao Shinohara
    • Organizer
      AGU Fall Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] GNSS-A observation of the Japan Coast Guard: a history of two decades2023

    • Author(s)
      Nakamura Y, Ishikawa T, Watanabe S, Nagae K, Yokota Y
    • Organizer
      AGU Fall Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Characteristics of shallow tremor waveforms observed by distributed acoustic sensing using offshore fiber-optic cable at the Nankai Trough, southwest Japan2023

    • Author(s)
      Baba, S., Araki, E., Yamamoto, Y., Hori, T., Fujie, G., Nakamura, Y., Yokobiki, T., & Matsumoto, H.
    • Organizer
      EGU General Assembly 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of a viscoelastic postseismic deformation theory based on nonlinear rheology for advanced satellite gravity missions2023

    • Author(s)
      Yoshiyuki TANAKA, Kazuma Nakakoji, Meike Meike Bagge, Henryk Dobslaw, Volker Klemann and Zdenek
    • Organizer
      ESA & NASA MAGIC Science and Applications Workshop
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seismological observation by distributed acoustic sensing using automatic phase picking method around the Tsugaru Strait, northeastern Japan2023

    • Author(s)
      Baba, S., Araki, E., Yokobiki, T., Kawamata, K., Uchiyama, K., & Yoshizuka, T.
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] UAVによるGNSS-A海底地殻変動観測の実証実験2023

    • Author(s)
      横田裕輔, 金田政太, 橋本武憲, 山浦秀作, 河野賢司, 平川嘉昭
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Engineering issues of UAV-based GNSS-A observation technology2023

    • Author(s)
      Yokota Y, Kaneda M, Hashimoto T, Yamaura S, Kouno K, Hirakawa Y
    • Organizer
      OCEANS2023 Gulf Coast
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 新しい海面プラットフォーム:UAVの海底測地観測への応用2023

    • Author(s)
      横田裕輔
    • Organizer
      第9回海中海底工学フォーラムZERO
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 体積膨張に伴う地殻変動における自己重力の影響の見積もり2023

    • Author(s)
      金子直樹,田中愛幸
    • Organizer
      日本火山学会2023年度秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 2017-2022年における琉球海溝SSEの時空間発展2023

    • Author(s)
      坂上啓、田中愛幸、加納将行
    • Organizer
      日本測地学会第140回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 体積膨張に伴う地殻変動に及ぼす自己重力の効果(I)2023

    • Author(s)
      田中愛幸, 金子直樹, Volker Klemann, Zdenek Martinec
    • Organizer
      日本測地学会第140回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 地殻変動モデリングにおけるGreen関数の比較(Ⅱ)2023

    • Author(s)
      高田大成,田中愛幸
    • Organizer
      日本測地学会第140回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 人工衛星重力ミッション高度化へ向けた、非線形レオロジーを考慮した粘弾性変形理論の開発(I)2023

    • Author(s)
      中小路一真,田中愛幸,Volker Klemann, Zdenek Martinec
    • Organizer
      日本測地学会第140回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 光ファイバーケブルを用いた能登半島群発地震のDAS観測2023

    • Author(s)
      田中愛幸 宮澤理稔 荒木英一郎
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 地殻変動モデリングにおけるGreen関数の比較と2011年東北地方太平洋沖地震の地震時断層すべり推定への適用2023

    • Author(s)
      高田大成,田中愛幸
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Detection of shallow tremors and investigation of their waveform characteristics by distributed acoustic sensing using offshore fiber-optic cable at the Nankai Trough, southwest Japan2023

    • Author(s)
      Baba, S., Araki, E., Yamamoto, Y., Hori, T., Fujie, G., Nakamura, Y., Yokobiki, T., & Matsumoto, H.
    • Organizer
      日本地球惑星科学連合大会2023年大会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 分布型音響センシングの歪波形データを用いた浅部微動の地震波エネルギー推定2023

    • Author(s)
      馬場慧・荒木英一郎
    • Organizer
      日本地震学会2023年度秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 2017-2022年における琉球海溝SSEの時空間発展2023

    • Author(s)
      坂上啓、田中愛幸、加納将行
    • Organizer
      日本地震学会2023年度秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Largest aftershock nucleation driven by afterslip during the 2014 Iquique sequence2023

    • Author(s)
      伊東優治、Socquet, Anne、Radiguet, Mathilde
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Largest aftershock nucleation driven by afterslip during the 2014 Iquique sequence2023

    • Author(s)
      Itoh, Yuji、Socquet, Anne、Radiguet, Mathilde
    • Organizer
      EGU General Assembly 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exponential moment release at the initiation of short-term slow slip events2023

    • Author(s)
      Itoh, Yuji、Socquet, Anne、Radiguet, Mathilde
    • Organizer
      AGU Fall Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Physical interpretation of slow earthquake migration process based on a friction law2023

    • Author(s)
      Keisuke Ariyoshi
    • Organizer
      The 28th IUGG General Assembly
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] An example analysis of high precision Geophysical observations with Hilbert-Huang Transform2023

    • Author(s)
      M. Okubo, H. Takahashi, A. Araya, S. Itaba, M. Kanao
    • Organizer
      The 28th IUGG General Assembly
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seismological observations by distributed acoustic sensing off the Cape Muroto and around the Tsugaru Strait.2023

    • Author(s)
      Baba, S., Araki, E., Yokobiki, T., Yamamoto, Y., Hori, T., Fujie, G., Nakamura, Y., Matsumoto, H., Kawamata, K. & Uchiyama, K.
    • Organizer
      Slow-to-Fast earthquake workshop in Taiwan
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 海底面での機動的傾斜観測実現に向けた長期試験観測: 温度係数2022

    • Author(s)
      塩原 肇,篠原雅尚,佐藤利典,伊藤亜妃,杉岡裕子
    • Organizer
      日本地震学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Observation accuracy of GNSS-A seafloor geodetic observation array (SGO-A) in 20222022

    • Author(s)
      Yokota Y, Ishikawa T, Watanabe S, Nakamura Y, Nagae K
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] GNSS-A seafloor geodetic observation along the Japan Trench and the Nankai Trough conducted by the Japan Coast Guard2022

    • Author(s)
      Nakamura Y, Ishikawa T, Watanabe S, Nagae K, Yokota Y
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Configuration design and positioning capability assessment of seafloor geodetic network2022

    • Author(s)
      Zhao S, Yokota Y, Wang Z, Xue S
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of UAV technology to realize high-frequency GNSS-A observation: preparation2022

    • Author(s)
      Yokota Y, Hashimoto T, Yamaura S, Kaneda M, Kawakami T, Hirakawa Y, Matsuda T
    • Organizer
      International joint workshop on Slow-to-Fast earthquakes 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Overview of the seafloor geodetic observation conducted by the Japan Coast Guard using the GNSS-Acoustic ranging combination technique2022

    • Author(s)
      Nakamura Y, Ishikawa T, Watanabe S, Yokota Y
    • Organizer
      EGU General Assembly 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Full-Bayesian GNSS-A seafloor positioning solution derived by the Markov-Chain Monte Carlo method2022

    • Author(s)
      Watanabe S, Ishikawa T, Nakamura Y, Yokota Y
    • Organizer
      EGU General Assembly 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of a method to analyze the error factor of GNSS-A system using SGO-A data2022

    • Author(s)
      Yokota Y, Ishikawa T, Watanabe S, Nakamura Y
    • Organizer
      EGU General Assembly 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SGO-Aにおける音響信号の角度・機器依存性と上下動誤差2022

    • Author(s)
      横田裕輔, 永江航也, 石川直史, 渡邉俊一, 中村優斗
    • Organizer
      日本地震学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 南海トラフ及び日本海溝におけるプレート境界すべりの検出能力2022

    • Author(s)
      石川直史, 横田裕輔
    • Organizer
      日本地震学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] SGO-Aにおける統一的な新しい音響信号読み取り方法の検討2022

    • Author(s)
      永江航也, 横田裕輔, 石川直史, 渡邉俊一, 中村優斗
    • Organizer
      日本地震学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 数値シミュレーションによるGNSS-A解析ソフトウェア「GARPOS」の測位誤差の評価2022

    • Author(s)
      中村優斗, 横田裕輔, 石川直史, 渡邉俊一
    • Organizer
      日本地震学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] SGO-Aにおける機器・角度依存した上下動誤差とGARPOSを用いた音響信号読み取り方法の検討2022

    • Author(s)
      永江航也, 横田裕輔, 石川直史, 渡邉俊一, 中村優斗
    • Organizer
      日本測地学会第138回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 数値シミュレーションによるGNSS-A解析ソフトウェア「GARPOS」の精度評価:フルベイズと経験ベイズの精度比較2022

    • Author(s)
      中村優斗, 横田裕輔, 石川直史, 渡邉俊一
    • Organizer
      日本測地学会第138回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 室戸岬沖におけるDASを用いたスロー地震観測2022

    • Author(s)
      馬場 慧・荒木 英一郎・山本 揚二朗・中村 恭之・藤江 剛・堀 高峰・松本 浩幸・西田 周平・横引 貴史
    • Organizer
      日本地震学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Observation of slow earthquakes by distributed acoustic sensing off Cape Muroto, southwest Japan2022

    • Author(s)
      Baba, S., Araki, E., Yamamoto, Y., Nakamura, Y., Fujie, G., Hori, T., Matsumoto, H., Nishida, S., & Yokobiki, T
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observation of slow earthquakes by distributed acoustic sensing off Cape Muroto, southwest Japan2022

    • Author(s)
      Baba, S., Araki, E., Yamamoto, Y., Nakamura, Y., Fujie, G., Hori, T., Matsumoto, H., Nishida, S., & Yokobiki, T.
    • Organizer
      International joint workshop on Slow-to-Fast earthquakes 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Imaging evolution of Cascadia slow-slip event using high-rate GPS2022

    • Author(s)
      Itoh, Y., Aoki, Y., Fukuda, J,
    • Organizer
      EGU General Assembly 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高サンプリングGPSを用いたCascadiaスロースリップの時空間発展の推定2022

    • Author(s)
      伊東優治・青木陽介・福田淳一
    • Organizer
      日本地球惑星科学連合大会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2014 年 Iquique 地震の初期余効すべりによる最大余震の誘発2022

    • Author(s)
      伊東優治,Socquet,Anne、Radiguet,Mathilde
    • Organizer
      日本測地学会第138回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Early afterslip of the 2014 Iquique earthquake led to the occurrence of the largest aftershock2022

    • Author(s)
      Itoh, Y., Socquet, A., Radiguet, M.
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Preliminary analysis of continuous gravity measurement data obtained at a long-term slow slip area in the Ryukyu Trench2022

    • Author(s)
      Hiramatsu, Y., Y. Tanaka., and A. Kobayashi
    • Organizer
      日本地球惑星科学連合大会2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Preliminary analysis of continuous gravity measurement data obtained in a slow slip area in the Ryukyu Trench2022

    • Author(s)
      Hiramatsu, Y., Y. Tanaka., and A. Kobayashi
    • Organizer
      International joint workshop on Slow-to-Fast earthquakes 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スロースリップ信号の検出に向けた石垣島気象台における連続重力データの解析 (第二報)2022

    • Author(s)
      平松祐一, 田中愛幸, 小林昭夫
    • Organizer
      日本測地学会第138回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Temporal gravity anomalies in long-term slow slip areas along the Nankai Trough and Cascadia2022

    • Author(s)
      Y. Tanaka, H. Sakaue and Y. Hiramatsu
    • Organizer
      International joint workshop on Slow-to-Fast earthquakes 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gravity observations in long-term sliow slip areas in Japan2022

    • Author(s)
      Y. Tanaka, H. Sakaue and Y. Hiramatsu
    • Organizer
      日本地球惑星科学連合大会2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 地震時の重力変化に及ぼす密度の水平不均質の効果2022

    • Author(s)
      田中愛幸, V. Klemann, Z. Martinec
    • Organizer
      日本測地学会第138回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2011年東北地方太平洋沖地震の地震時断層すべり推定におけるGreen関数の比較2022

    • Author(s)
      高田大成,田中愛幸
    • Organizer
      日本地球惑星科学連合大会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 地殻変動モデリングにおけるGreen関数の比較2022

    • Author(s)
      高田大成,田中愛幸
    • Organizer
      日本測地学会第138回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] An estimate of the effects of laterally heterogeneous density distributions on coseismic gravity change2022

    • Author(s)
      Y. Tanaka, V. Klemann, Z. Martinec
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Precise monitoring of slow earthquakes around Nankai Trough toward early detecting crustal deformation2022

    • Author(s)
      Keisuke Ariyoshi
    • Organizer
      International joint workshop on Slow-to-Fast earthquakes 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Extension of aseismic slip propagation theory to slow earthquake migration2022

    • Author(s)
      Keisuke Ariyoshi
    • Organizer
      日本地球惑星科学連合大会2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 小型絶対重力計TAG-1を用いた低温野外環境における 連続重力観測2022

    • Author(s)
      新谷昌人, 岡大輔, 風間卓仁, 西島潤, 服部晃久, 福田洋一, 奥野淳一, 青山雄一, 土井浩一郎, 葛西恵介, 坪川恒也
    • Organizer
      日本測地学会第138回講演会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 海底光ファイバー歪計で観測した南海トラフの浅部ゆっくり滑りとそれに伴う超低周波地震活動について2022

    • Author(s)
      荒木 英一郎、横引 貴史、馬場 慧、山本 揚二朗、Zumberge Mark、西田 周平、町田 祐弥、松本 浩幸
    • Organizer
      日本地震学会2022年度秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Shallow slow slip and associated VLFE observed by seafloor fiber optic strainmeter in the Nankai Trough2022

    • Author(s)
      Eiichiro Araki, Takashi Yokobiki, Satoru Baba, Yojiro Yamamoto, Mark A Zumberge, Shuhei Nishida, Yuya Machida and Hiroyuki Matsumoto
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seafloor fiber optic sensing technological development to capture slow process in the Nankai Trough megathrust2022

    • Author(s)
      Eiichiro Araki, Takashi Yokobiki, Hiroyuki Matsumoto, Satoru Baba, Shuhei Tsuji, Shuhei Nishida, Yuya Machida and Yoshiyuki Tanaka
    • Organizer
      AGU 2022 Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Technological overview of GNSS-A analysis software GARPOS and GNSS-A Seafloor Geodetic Observation Array (SGO-A) around Japan, operated by the Japan Coast Guard2022

    • Author(s)
      Yokota Y, Ishikawa T, Watanabe S, Nakamura Y
    • Organizer
      OCEAN SCIENCE MEETING 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gravity data analysis to extract temporal gravity anomalies during the slow slip events in the Ryukyu Trench2021

    • Author(s)
      Y. Hiramatsu., Y. Tanaka., and A. Kobayashi
    • Organizer
      International Joint Workshop on Slow Earthquakes 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スロースリップ信号の検出に向けた石垣島気象台における重力解析 (第一報)2021

    • Author(s)
      平松祐一, 田中愛幸, 小林昭夫
    • Organizer
      日本測地学会第136回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Gravity data analysis to extract temporal gravity anomalies associated with slow slip events in the Ryukyu Trench2021

    • Author(s)
      Y. Hiramatsu., Y. Tanaka., and A. Kobayashi
    • Organizer
      AGU Fall Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Detection of shallow SSE off the Kii Peninsula by onshore borehole strainmeter2021

    • Author(s)
      Satoshi Itaba, Kazuaki Ohta, Hiroshi Hasegawa
    • Organizer
      International Joint Workshop on Slow Earthquakes 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 陸上ボアホール歪観測による紀伊半島沖浅部SSEの検出2021

    • Author(s)
      板場智史、太田和晃、長谷川浩
    • Organizer
      日本地震学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 陸上ボアホール歪観測による紀伊半島沖浅部SSEの検出2021

    • Author(s)
      板場智史、太田和晃、長谷川浩
    • Organizer
      日本測地学会第136回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 地震時変形に対する曲率や弾性定数の水平不均質の影響2021

    • Author(s)
      田中 愛幸
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Estimating the Effects of Laterally Heterogeneous Density Structures on Coseismic Deformation -a Rotationally Symmetric Case-2021

    • Author(s)
      Yoshiyuki Tanaka, Volker Klemann, Zdenec Martinec
    • Organizer
      AGU Fall Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gravity observations in the long-term slow slip areas2021

    • Author(s)
      Yoshiyuki Tanaka, Hiromu Sakaue, Yuichi Hiramatsu
    • Organizer
      International Joint Workshop on Slow Earthquakes 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 光格子時計の利用により期待される地殻変動監視の高度化2021

    • Author(s)
      田中 愛幸、香取 秀俊
    • Organizer
      日本測地学会第136回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] GNSS-A observation along the Nankai Trough by Japan Coast Guard’s Seafloor Geodetic Observation Array (SGO-A)2021

    • Author(s)
      Nakamura Y, Ishikawa T, Watanabe S, Yokota Y
    • Organizer
      AGU Fall Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Co- and postseismic slip behaviors of the 2011 Tohoku-oki earthquake extracted from decadal seafloor geodesy with the GNSS-A Seafloor Geodetic Observation Array (SGO-A) operated by the Japan Coast Guard2021

    • Author(s)
      Watanabe S, Ishikawa T, Nakamura Y, Yokota Y
    • Organizer
      AGU Fall Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 数値シミュレーションを用いたGNSS-A海底地殻変動観測における単層の海中音速水平傾斜場による影響の検証2021

    • Author(s)
      中村優斗, 横田裕輔, 石川直史, 渡邉俊一
    • Organizer
      日本測地学会第136回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] GNSS-A海底地殻変動の地殻変動現象の検出能力2021

    • Author(s)
      石川直史, 横田裕輔, 渡邉俊一, 中村優斗
    • Organizer
      日本測地学会第136回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] GNSS-A海底地殻変動観測に影響を与える傾斜場の時間安定性と観測精度2021

    • Author(s)
      横田裕輔, 渡邉俊一, 石川直史, 中村優斗
    • Organizer
      日本地震学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] GNSS-A海底地殻変動アレイ「SGO-A」で捉えた東北地方太平洋沖地震後10年間の地震後海底地殻変動2021

    • Author(s)
      渡邉俊一, 石川直史, 中村優斗, 横田裕輔
    • Organizer
      日本地震学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] GNSS-A海底地殻変動観測アレイSGO-Aによる南海トラフプレート境界のすべり欠損レートの変動モニタリング2021

    • Author(s)
      石川直史, 渡邉俊一, 中村優斗, 横田裕輔
    • Organizer
      日本地震学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 数値シミュレーションを用いたGNSS-A海底地殻変動観測における海中音速場の影響評価2021

    • Author(s)
      中村優斗, 横田裕輔, 石川直史, 渡邉俊一
    • Organizer
      日本地震学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Possible relationship between tides and decadal changes of seismicity in Japan2021

    • Author(s)
      Yoshiyuki Tanaka
    • Organizer
      19th International Symposium on Geodynamics and Earth Tides
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 日本測地学会賞瀬戸賞

    • URL

      https://geod.jpn.org/seto/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 南海トラフ地震予測に向けた研究の現状と予測可能性

    • URL

      https://ds0n.cc.yamaguchi-u.ac.jp/~cldpm/eventreport.html

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2021-10-22   Modified: 2025-12-26  

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