GRiD W-phase MT: Realtime Earthquake Analysis System for Large Earthquake and Tsunami Earthquake

• Project/Area Number: 21310114
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Natural disaster science
• Research Institution: The University of Tokyo
• Principal Investigator: TSURUOKA Hiroshi 東京大学, 地震研究所, 准教授 (10280562)
• Co-Investigator(Kenkyū-buntansha): KAWAKATU Hitoshi 東京大学, 地震研究所, 教授 (60242153)
• Co-Investigator(Renkei-kenkyūsha): LUIS Rivera ストラスブール大学(フランス), 教授
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000); Fiscal Year 2011: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000); Fiscal Year 2010: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000); Fiscal Year 2009: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
• Keywords: リアルタイム / GRiD MT / W-phase / 巨大地震 / 災害軽減

Research Abstract

We have developed and implemented a new grid-based earthquake analysis system that continuously monitors long-period seismic wave filed (W-phase) recorded by regional and global broadband seismometers. This new analysis system automatically and simultaneously determines the origin time, location and moment tensor of large seismic events and tsunami earthquakes within 6 min for regional events and 15 min for global ones.

Research Products

• [Journal Article] Moment tensors for rapid characterization of megathrust earthquakes: the example of the 2011 M9 Tohoku-oki, Japan earthquake (2012)
  • Author(s): Guilhem, A., D. Dreger, Tsuruoka, H., and Kawakatsum H.
  • Journal Title: Geophys. J. Int. Volume: (in press)
• [Journal Article] GRiD MT (Grid-based Realtime Determination of Moment Tensors) monitoring the long-period seismic wavefield (2009)
  • Author(s): Tsuruoka, H., Kawakatsu, H., and T. Urabe
  • Journal Title: Phys. Earth Planet. Inter Volume: 175 Pages: 8-16
• [Journal Article] GRiD MT(Grid-based Realtime Determination of Moment Tensors)monitoring the long-period seismic wavefield (2009)
  • Author(s): Tsuruoka, H., Kawakatsu, H., T.Urabe
  • Journal Title: Phys.Earth Planet. Inter 175 Pages: 8-16
  • Peer Reviewed
• [Presentation] Time reversal source imaging and GRiD MT monitoring with W-phase (2010)
  • Author(s): Hiroshi Tsuruoka, L.Rivera, H.Kawakatsu
  • Organizer: 2010 SSA Annual Meeting
  • Place of Presentation: Portland, U.S.A
  • Year and Date: 2010-04-23
• [Presentation] Time reversal source imaging and GRiD MT monitoring with W-phase (2010)
  • Author(s): Hiroshi Tsuruoka, L. Rivera, H. Kawakatsu
  • Organizer: 2010 SSA Annual Meeting
  • Place of Presentation: Portland, USA
• [Presentation] GRiD MT and recent updates (2010)
  • Author(s): Hiroshi Tsuruoka, L. Rivera, H. Kawakatsu, H. Kanamori
  • Organizer: WPGM 2010
  • Place of Presentation: Taipei, Taiwan
• [Presentation] Feasibility test of GRiD MT with W-phase monitoring in Japan (2010)
  • Author(s): Hiroshi Tsuruoka, L. Rivera, H. Kawaka tsu
  • Organizer: 日本地震学会2010年度秋季大会
  • Place of Presentation: 広島国際会議場(広島)
• [Presentation] Realtime source inversion using W-phase and GRiD MT for regional tsunami early warning (2009)
  • Author(s): 鶴岡弘
  • Organizer: AGU 2009
  • Place of Presentation: サンフランシスコ
  • Year and Date: 2009-12-14
• [Presentation] Realtime source inversion using W-phase and GRiD MT for regional tsunami early warning (2009)
  • Author(s): Tsuruoka, H. et al.
  • Place of Presentation: San-francisco, USA.
• [Remarks]
  • URL: http://wwweic.eri.u-tokyo.ac.jp/GRiD_MT/
• [Remarks]
  • URL: http://wwweic.eri.u-tokyo.ac.jp/WPHASE/
• [Remarks] WPHASE SOLUTION in GLOBAL
  • URL: http://wwweic.eri.u-tokyo.ac.jp/WPHASE/global/
• [Remarks] WPHASE SOLUTION in JAPAN
  • URL: http://wwweic.eri.u-tokyo.ac.jp/WPHASE/japan/
• [Remarks] GRiD MT
  • URL: http://wwweic.eri.u-tokyo.ac.jp/GRiD_MT/