Determination of deep structure under Japan using waveform inversion and Spectral-Element Method

• Project/Area Number: 21340131
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: TSUBOI Seiji 独立行政法人海洋研究開発機構, 地球情報研究センター, 部長 (90183871)
• Co-Investigator(Renkei-kenkyūsha): OBAYASH Masayuk 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 主任研究員 (30359179) ; TONO Yoko 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 研究技術専任スタッフ (90359183)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000); Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2010: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000); Fiscal Year 2009: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
• Keywords: 地球 / 惑星内部構造 / 地球内部構造モデル / 数値地震波形計算 / スペクトル要素法 / 波形インバージョン / 理論地震波形計算 / 地球内部構造インバージョン / 地球内部3次元構造モデル

Research Abstract

We obtained seismic velocity structure model under the Japanese Island using waveform inversion technique up to depth 2000km and the precision of about 20 seconds. To calculate synthetic seismograms, we used Spectral-Element Method. The obtained model shows different spatial distribution for P-wave and S-wave structure respectively, which may imply that the velocity structure is derived from different origins.

Research Products

• [Journal Article] On the application of Mwp in the near field and the March 11, 2011 Tohoku Earthquake (2012)
  • Author(s): Barry Hirshorn
  • Journal Title: Pure and Applied. Geophysics. Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] Source process and broadband waveform modeling of 2011 Tohoku earthquake using the Earth Simulator (2012)
  • Author(s): Seiji Tsuboi
  • Journal Title: High Performance Computing on Vector Systems Volume: (印刷中)
• [Journal Article] Evidence of a thick localized ultra low velocity zone inside the Pacific slow region at the base of the mantle, Phys (2011)
  • Author(s): To A., Fukao Y., Tsuboi, S
  • Journal Title: Earth PlanetInter. Volume: 184 Pages: 119-133
  • URL: http://dx.doi.org/10.1016/j.pepi.2010.10.015
  • Peer Reviewed
• [Journal Article] Evidence of a thick localized ultra low velocity zone inside the Pacific slow region at the base of the mantle (2011)
  • Author(s): Akiko To
  • Journal Title: Phys.Earth Planet Int. Volume: 184 Pages: 119-133
  • Peer Reviewed
• [Journal Article] Evidence of a thick localized ultra low velocity zone inside the Pacific slow region at the base of the mantle (2011)
  • Author(s): Akiko To
  • Journal Title: Phys.Earth Planet.Inter. Volume: 184 Pages: 119-133
  • Peer Reviewed
• [Journal Article] Antipodal seismic observation of temporal and global variation at Earth's inner-outer core boundary, Geophy (2010)
  • Author(s): Butler, R., Tsuboi, S.
  • Journal Title: Res. Lett. Volume: 37 Issue: 11
  • DOI: 10.1029/2010gl042908
  • Peer Reviewed
• [Journal Article] Rupture process of the 2008 Wenchuan, China earthquake inferred from teleseismic waveform inversion and forward modeling of broadband seismic waves (2010)
  • Author(s): Nakamura, T., Tsuboi, S., Kaneda, Y., Yamanaka, Y.
  • Journal Title: Tectonophysic Volume: 491 Pages: 72-84
  • URL: http://dx.doi.org/10.1016/j.tecto.2009.09.020
  • Peer Reviewed
• [Journal Article] Rupture process of the 2008 Wenchuan, China earthquake inferred from teleseismic waveform inversion and forward modeling of broadband seismic waves (2010)
  • Author(s): Takeshi Nakamura
  • Journal Title: Tectonophjysics Volume: 491 Pages: 72-84
  • Peer Reviewed
• [Journal Article] Antipodal seismic observation of temporal and global variation at Earth's inner-outer core boundary (2010)
  • Author(s): Rhett Butler
  • Journal Title: Geophys.Res.Lett. Volume: 37
  • Peer Reviewed
• [Journal Article] Rupture process of the 2008 Wenchuan, China earthquake inferred from teleseismic waveform inversion and forward modeling of broadband seismic waves (2010)
  • Author(s): Takeshi Nakamura
  • Journal Title: Tectonophysics (印刷中)
  • Peer Reviewed
• [Journal Article] Visualization of geoscience data on Google Earth : development of a data converter system for seismic tomographic models (2010)
  • Author(s): Yasuko Yamagishi
  • Journal Title: Computers & Geosciences 36 Pages: 373-382
  • Peer Reviewed
• [Journal Article] Visualization of geoscience data on Google Earth : development of a data converter system for seismic tomographic models (2009)
  • Author(s): Y. Yamagishi, H. Yanaka, K. Suzuki, S. Tsuboi, T. Isse, M. Obayashi, H. Tamura, H. Nagao
  • Journal Title: Computers & Geosciences Volume: 36 Pages: 373-382
  • Peer Reviewed
• [Journal Article] Seismic anisotropy of the Pacific slab and mantle wedge beneath the Japanese islands (2009)
  • Author(s): Y. Tono, Y. Fukao, T. Kunugi, S. Tsubo
  • Journal Title: J. Geophys. Res Volume: 114
  • Peer Reviewed
• [Journal Article] Variationalprinciple for Rayleigh wave ellipticity (2009)
  • Author(s): T. Tanimoto, S. Tsuboi
  • Journal Title: Geophys. J. Int Volume: 179 Issue: 3 Pages: 1658-166
  • DOI: 10.1111/j.1365-246x.2009.04360.x
  • Peer Reviewed
• [Journal Article] Seismic anisotropy of the Pacific slab and mantle wedge beneath the Japanese islands (2009)
  • Author(s): Yoko Tono
  • Journal Title: Journal of Geophysical Research 114
  • Peer Reviewed
• [Presentation] Determination of Earth structure using waveform inversion and Spectral-Element Method for Eastern Asian region (2011)
  • Author(s): Seiji Tsuboi
  • Organizer: American Geophysical Union
  • Place of Presentation: アメリカ、サンフランシスコ市モスコーニ会議場
  • Year and Date: 2011-12-08
• [Presentation] Determination of Earthn Structure using waveform inversion and Spectral-Element Metho (2011)
  • Author(s): Sejii Tsuboi
  • Organizer: Asia Oceania Geosciences Societ
  • Place of Presentation: 中華民国、台北市国際会議場
  • Year and Date: 2011-08-12
• [Presentation] Source Process and Broadband Waveform Modeling of 2011 Tohoku earthquake using Spectral-Element Method (2011)
  • Author(s): Sejii Tsuboi
  • Organizer: Asia Oceania Geosciences Society
  • Place of Presentation: 中華民国、台北市国際会議場
  • Year and Date: 2011-08-11
• [Presentation] Adjoint Tomography of East Asia (2011)
  • Author(s): Masayuki Obayashi
  • Organizer: International Union of Geodesy and Geophysics
  • Place of Presentation: オーストラリア、メルボルン市メルボルン会議場
  • Year and Date: 2011-07-02
• [Presentation] Determination of Earth structure using waveform inversion and Spectral-Element Method (2010)
  • Author(s): Masayuki Obayashi
  • Organizer: American Geophysical Unio
  • Place of Presentation: アメリカ、サンフランシスコ市モスコーニ会議場
  • Year and Date: 2010-12-15
• [Presentation] Letermination of Earth structure using waveform inversion and Spectral-Element Method (2010)
  • Author(s): Masayuki Obayashi
  • Organizer: American Geophysical Union
  • Place of Presentation: 米国サンフランシスコ市モスコーニ会議場
  • Year and Date: 2010-12-15
• [Presentation] Antipodal observations of Earth's Core (2009)
  • Author(s): Rhett Butler
  • Organizer: American Geophysical Union
  • Place of Presentation: 米国サンフランシスコ市
  • Year and Date: 2009-12-18