Evidence of the coupling of a fast magnetospheric cavity mode to field line resonances

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We present an evidence of the coupling of a fast magnetospheric cavity mode to field line resonances. The power of filtered <I>H</I> and <I>D</I> components of Pi 2 pulsations during March-April in 1978 and 1979 from IGS chain in the United Kingdom (UK) shows that there are two enhancements located near <I>L</I> = 3.5 and 5.5 in the distribution profile. The irreversible hydromagnetic wave coupling is studied by using a box model for the magnetosphere. The cold linearized MHD equations is examined with realistic Alfven speed profile for the uniform and nonuniform ambient magnetic fields, respectively. With appropriate parameters to depict the magnetospheric environments during the aforementioned period, numerical results are acquired with the fourth order Runge-Kutta method and quite consistent with data analysis. We suggest that the coupling of a fast magnetospheric cavity mode driven by fast compressional waves owing to the impulsive source at the magnetotail to resonant field lines at low latitudes is a possible scenario of the propagation mechanism for low latitude Pi 2 pulsations.

収録刊行物

  • Earth, planets and space

    Earth, planets and space 50(8), 683-697, 1998-08

    The Seismological Society of Japan, Society of Geomagnetism and Earth, Planetary and Space Sciences, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences

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被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10003735806
  • NII書誌ID(NCID)
    AA11211921
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13438832
  • NDL 記事登録ID
    4573120
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z54-J298
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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