Seismic reflection survey on the computers using seismic interferometry

• Project/Area Number: 26287109
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: FUJIE Gou 国立研究開発法人海洋研究開発機構, 地震津波海域観測研究開発センター, 主任技術研究員 (50371729)
• Co-Investigator(Kenkyū-buntansha): 仲西 理子 国立研究開発法人海洋研究開発機構, 地震津波海域観測研究開発センター, 技術研究員 (30371727) ; 佐藤 壮 国立研究開発法人海洋研究開発機構, 地震津波海域観測研究開発センター, 特任技術研究員 (10373458)
• Project Period (FY): 2014-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000); Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 南海トラフ / 地震波干渉法 / 海底地震計 / 地震探査 / 地下構造 / 屈折法データ / 反射法 / 波形インバージョン / 地球・惑星内部構造 / 地震 / 海洋探査

Outline of Final Research Achievements

We applied seismic interferometry to the OBS-airgun seismic survey data to synthesize seismic reflection data acquired at sea surface. We applied seismic migration techniques to the synthesized data and succeeded in imaging sedimentary structure along the survey line. Then, we reanalyzed the OBS-airgun data by referring to the sedimentary structure imaged by the seismic interferometry and updated the subducting plate interface model in the Nankai subduction zone. Moreover, we applied pre-stack depth migration to the synthesized seismic reflection data by using a seismic velocity model derived from the full-waveform inversion of the same OBS-airgun data. The result indicated that the combination of the seismic interferometry and full-waveform inversion is a powerful tool to determine the detailed seismic structure by the OBS-airgun data.

Academic Significance and Societal Importance of the Research Achievements

南海トラフ域など沈み込み地震発生帯の深部を正しくイメージングするには、浅部堆積層の実態把握が不可欠である。一般に、浅部イメージングには反射法地震探査が効果的であるが、船舶輻輳や漁業との競合のため沿岸域などでは長いケーブルの曳航が必要な反射法地震探査は実施できず、結果として、深部イメージングの不確定性が大きくなるという問題があった。本研究では、沿岸域などでも比較的容易に実施できる屈折法探査データから反射法データを合成し堆積層の実態把握ができることを示した。本アプローチにより、南海トラフ域に限らず地震発生帯の深部構造の正確な実態把握が進められると期待される。

Research Products

• [Int'l Joint Research] University Grenoble alpes(フランス)
• [Int'l Joint Research] IG PAS(ポーランド)
• [Int'l Joint Research] Universiy Grenoble Alpes(フランス)
• [Int'l Joint Research] Inst. of Geophys., Polish Aca. of Sci.(ポーランド)
• [Journal Article] Feasibility study on the waveform analysis to the conventional wide-angle marine seismic survey data (2019)
  • Author(s): Fujie Gou、Nakanishi Ayako、Sato Takeshi、Kodaira Shuichi、Miura Seiichi
  • Journal Title: Proceedings of the 13th SEGJ International Symposium Volume: 1 Pages: 588-588
  • DOI: 10.1190/segj2018-018.1
  • Peer Reviewed
• [Journal Article] Three-dimensional plate geometry and P-wave velocity models of the subduction zone in SW Japan: Implications for seismogenesis (2018)
  • Author(s): Ayako Nakanishi, Narumi Takahashi, Yojiro Yamamoto, Tsutomu Takahashi, Seckin Ozgur Citak, Takeshi Nakamura, Koichiro Obana, Shuichi Kodaira and Yoshiyuki Kaneda
  • Journal Title: Geological Society of America Special Paper Volume: 534 (印刷中) Pages: 1-18
  • DOI: 10.1130/2018.2534(04)
  • ISBN: 9780813725345, 9780813795348
  • Peer Reviewed
• [Journal Article] Interferometric OBS imaging for wide-angle seismic data, (2017)
  • Author(s): K. Shiraishi, G. Fujie, T. Sato, S. Abe, E. Asakawa, S. Kodaira,
  • Journal Title: Geophysics Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Near-field observations of an offshore Mw 6.0 earthquake from an integrated seafloor and subseafloor monitoring network at the Nankai Trough, southwest Japan (2016)
  • Author(s): L. M. Wallace, E. Araki, D. Saffer, X. Wang, A. Roesner, A. Kopf, A. Nakanishi, W. Power, R. Kobayashi, C. Kinoshita, S. Toczko, T. Kimura, Y. Machida, and S. Carr
  • Journal Title: J. Geophys. Res. Solid Earth Volume: 121 Issue: 11 Pages: 8338-8351
  • DOI: 10.1002/2016jb013417
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Detailed crustal imaging in the Nankai Trough subduction zone using OBS-airgun data (2018)
  • Author(s): Gou Fujie, Takeshi Sato, Kazuya Shiraishi, Ayako Nakanishi, Shuichi Kodaira, Seiichi Miura, Andrzej Gorszczyk, Eiichi Asakawa, Takao Nibe, Romain Brossier
  • Organizer: SEISMIX2018
  • Int'l Joint Research
• [Presentation] Feasibility study on the waveform analysis to the conventional wide-angle marine seismic survey data (2018)
  • Author(s): Gou Fujie, Ayako Nakanishi, Takeshi Sato, Shuichi Kodaira, Seiichi Miura
  • Organizer: The 13th SEGJ International Symposium
  • Int'l Joint Research
• [Presentation] Feasibility of the waveform analysis to the existing conventional wide-angle seismic survey data - Ocean Bottom Seismometer (OBS) and controlled-source seismic surveys in the Nankai subduction zone - (2017)
  • Author(s): Fujie, G., A. Nakanishi, T. Sato, S. Kodaira
  • Organizer: IAG-IASPEI 2017
  • Int'l Joint Research
• [Presentation] Waveform inversion to image laterally inhomogeneous crustal structure - comparison among waveform inversion, traveltime inversion, and seismic migration (2017)
  • Author(s): T. Sato, G. Fujie, K. Shiraishi, S. Kodaira, S. Miura, E. Asakawa, T. Nibe, N. Yui, S. Abe, R. Brossier, J. Virieux
  • Organizer: IAG-IASPEI 2017
  • Int'l Joint Research
• [Presentation] Variation in the nature of incoming oceanic plate along Japan Trench (2017)
  • Author(s): Fujie, G., K. Obana, Y. Kaiho, T. Yamada, S. Kodaira, T. Isse, S. Miura
  • Organizer: AGU fall meeting 2017
  • Int'l Joint Research
• [Presentation] Heterogeneous Structure in the incoming Philippine Sea plate along the southwestern Nankai Trough (2016)
  • Author(s): Ayako NAKANISHI , Yojiro YAMAMOTO, Mikiya YAMASHITA, Gou FUJIE , Seiichi MIURA, Shuichi KODAIRA, Yoshiyuki KANEDA
  • Organizer: 2016 American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, CA, USA
  • Year and Date: 2016-12-14
  • Int'l Joint Research
• [Presentation] 四国沖フィリピン海プレートの構造不均質 (2016)
  • Author(s): 仲西理子・山下幹也・山本揚二朗・藤江剛・三浦誠一・小平秀一 (JAMSTEC)・金田義行(香川大)
  • Organizer: 日本地震学会 2016年度秋季大会
  • Place of Presentation: 名古屋国際会議場、愛知県名古屋市
  • Year and Date: 2016-10-05
• [Presentation] Structural variation of the incoming Philippine Sea plate along the Nankai Trough off Shikoku (2016)
  • Author(s): Ayako NAKANISHI, Yojiro YAMAMOTO, Mikiya YAMASHITA, Gou FUJIE , Seiichi MIURA ,Shuichi KODAIRA, Yoshiyuki KANEDA
  • Organizer: Japan Geoscience Union Meeting 2016
  • Place of Presentation: 幕張メッセ、千葉県千葉市
  • Year and Date: 2016-05-23
  • Int'l Joint Research
• [Presentation] Interferometric imaging of crustal structure from wide-angle multicomponent OBS data (2015)
  • Author(s): Kazuya Shiraishi, Gou Fujie, Takeshi Sato, Susumu Abe, Eiichi Asakawa, Shuichi Kodaira
  • Organizer: 2015 AGU Fall Meeting
  • Place of Presentation: Moscone Center、米国・サンフランシスコ
  • Year and Date: 2015-12-14
  • Int'l Joint Research
• [Presentation] 沈み込む前の四国沖フィリピン海プレートの構造不均質 (2015)
  • Author(s): Ayako Nakanishi
  • Organizer: 平成27年度 地震研究所共同利用研究集会「海溝の海側で生じる過程を探る:沈み込み帯へのインプット」
  • Place of Presentation: 東京大学・地震研究所、東京都文京区
  • Year and Date: 2015-11-11
• [Presentation] Three-dimensional plate geometry and velocity model for the Nankai Trough subduction seismogenic zone based on structural studies (2015)
  • Author(s): Ayako NAKANISHI, Narumi TAKAHASHI, Yojiro YAMAMOTO, Tsutomu TAKAHASHI , Seckin Ozgur CITAK, Takeshi NAKAMURA , Koichiro OBANA, Shuichi KODAIRA, Yoshiyuki KANEDA
  • Organizer: 12 th Annual Meeting Asia Oceania Geosciences Society
  • Place of Presentation: Suntec Singapore Convention & Exhibition Centre、シンガポール
  • Year and Date: 2015-08-07
  • Int'l Joint Research
• [Presentation] Heterogeneous Structure in the incoming Philippine Sea plate along the Nankai Trough (2015)
  • Author(s): Ayako NAKANISHI, Yojiro YAMAMOTO , Mikiya YAMASHITA , Hikaru IWAMRU , Gou FUJIE , Seiichi MIURA ,Shuichi KODAIRA , Yoshiyuki KANEDA
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ、千葉県千葉市
  • Year and Date: 2015-05-24
• [Presentation] Structural variation in the incoming Philippine Sea plate along the Nankai Trough (2014)
  • Author(s): Ayako NAKANISHI, Yojiro YAMAMOTO, Mikiya YAMASHITA, Hikaru IWAMRU, Gou FUJIE, Shuichi KODAIRA, Yoshiyuki KANEDA,
  • Organizer: 2014 AGU Fall Meeting
  • Place of Presentation: Moscone Center (米国・サンフランシスコ)
  • Year and Date: 2014-12-19
• [Presentation] 四国沖から紀伊水道沖におけるフィリピン海プレートの構造 (2014)
  • Author(s): 仲西理子・山本揚二朗・山下幹也・井和丸光・藤江剛・小平秀一・金田義行
  • Organizer: 日本地震学会2014年度秋季大会
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2014-11-26
• [Presentation] 構造研究に基づく南海トラフ地震発生帯の3次元速度構造モデル (2014)
  • Author(s): Ayako NAKANISHI, Narumi TAKAHASHI, Yojiro YAMAMOTO, Tsutomu TAKAHASHI, Koichiro OBANA, Shuichi KODAIRA, Yoshiyuki KANEDA
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
  • Year and Date: 2014-04-29