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2010 Fiscal Year Self-evaluation Report

Analysis of the short-period wave propagation in the ionosphere associated with earthquakes using 4D GPS tomography

Research Project

  • PDF
Project/Area Number 20340123
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Solid earth and planetary physics
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

OBAYASHI Masayuki  Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, 主任研究員 (30359179)

Project Period (FY) 2008 – 2011
Keywordsトモグラフィー / 電離層擾乱 / 地震が発生する大気波動 / GPS-TEC擾乱 / GEONET / 大気重力波 / 長周期音波 / 大気境界波
Research Abstract

地震発生直後に電離層内部を伝わる波動現象がGPS全電子数変化の連続観測により捉えられた。この現象は大気中を地震波のように音波などが伝播していると考えられている。GPS全電子数観測データを対象とする時間を含む4Dトモグラフィー法の開発し、実データに適応して波動現象時空間発展の記載を可能にすることが第一の目標である。さらに、地震により励起された大気中を伝播する全電子数変化現象の数値モデリング手法の開発し、観測された伝播現象と比較することで、GPS全電子数変化から地震震源の定量化を行うことが第二の目標である。

  • Research Products

    (10 results)

All 2010 2009 2008

All Journal Article (5 results) (of which Peer Reviewed: 4 results) Presentation (5 results)

  • [Journal Article] Acoustic Resonant Oscillations Between the Atmosphere and the Solid Earth During the 1991 Mt.2010

    • Author(s)
      Watada, S, H.Kanamori
    • Journal Title

      Pinatubo Eruption, J.Geophys.Res. 115

      Pages: B12319(doi:10.1029/2010JB007747)

    • Peer Reviewed
  • [Journal Article] Acoustic Gravity Waves from Earthquakes2010

    • Author(s)
      T.Mikumo, S. Watada
    • Journal Title

      in Infrasound Monitoring for Atmospheric Studies(eds A.Le Pichon, E.Blanc, A.Hauchecorne, Springer)

      Pages: 259-275

    • Peer Reviewed
  • [Journal Article] Radiation of acoustic and gravity waves and propagation of boundary waves in the stratified fluid from a time-varying bottom boundary2009

    • Author(s)
      Watada, S
    • Journal Title

      J.Fluid Mech. 627

      Pages: 361-377

    • Peer Reviewed
  • [Journal Article] 大地震に伴う気圧変動2009

    • Author(s)
      綿田辰吾
    • Journal Title

      地震ジャーナル 47

      Pages: 25-26

  • [Journal Article] Low-frequency acoustic-gravity waves from tectonic deformation associated with the 2004 Sumatra-Andaman earthquake (Mw=9.2)2008

    • Author(s)
      Mikumo, T.T.Shibutani, A.L.Pichon, M.Garces, D.Fee, T.Tsuyuki, S.Watada, W.Morii
    • Journal Title

      J.Geophys.Res. 113

      Pages: B12402(doi:10.1029/2008JB005710)

    • Peer Reviewed
  • [Presentation] Azimuthal Traveltime and Amplitude Anomalies of Tropospheric and Thermospheric Acoustic Waves From the Explosive Eruption of the Sakurajima Volcano in Japan2010

    • Author(s)
      Watada. S., N. Arai, T. Murayama, M. Iwakuni, M. Nogami, Y. Imanishi, T. Oi, Y. Kitagawa
    • Organizer
      Americal Geophysical Union fall meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      2010-12-13
  • [Presentation] ハスケル行列法による大気・固体地球結合系のモード計算2010

    • Author(s)
      綿田辰吾
    • Organizer
      日本地震学会秋期大会
    • Place of Presentation
      広島国際会議場(広島市)
    • Year and Date
      2010-10-29
  • [Presentation] Radiation of Atmospheric waves from the ground motion: Observation and Theory From an Array of Co-located Microbarometers and Broadband Seismometers in Japan2009

    • Author(s)
      綿田辰吾, S.Sekiguchi, K.Nishida, 大林政行
    • Organizer
      Americal Geophysical Union fall meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      2009-12-14
  • [Presentation] Wave Propagation in the Ionosphere Associated With Earthquakes Revealed by GPS-TEC 4D Tomography2008

    • Author(s)
      Watada, S., M. Obayashi, S. Ozawa
    • Organizer
      Americal Geophysical Union fall meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      2008-12-17
  • [Presentation] GPS4次元トモグラフィーによる地震発生に伴う電離層内波動現象の解明2008

    • Author(s)
      綿田辰吾, 大林政行, 小沢慎三郎
    • Organizer
      地球電磁気・地球惑星圏学会
    • Place of Presentation
      仙台
    • Year and Date
      2008-10-11

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Published: 2012-02-13   Modified: 2016-04-21  

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