Electromagnetic response of the mantle to long-period geomagnetic variations over the globe

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Long-period electromagnetic response must be estimated to derive information on the electrical conductivity distribution within the deep mantle of the Earth. For this, we estimated the electromagnetic response function for long-period geomagnetic variations, on the basis of the <I>P</I><SUB>1</SUB> approximation. The data used for analyses are geomagnetic daily mean values for 10 years (1965-1974) from 59 stations distributed over the globe and for about 20 years (1960-1980) from 9 stations. It turned out that the <I>P</I><SUB>1</SUB> approximation generally holds except for the periods corresponding to annual and semi-annual variations. We also found that accurate estimation is difficult for periods longer than a few years, probably because of contamination due to secular variations of core origin.

収録刊行物

  • Earth, planets and space

    Earth, planets and space 50(8), 651-662, 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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各種コード

  • NII論文ID(NAID)
    10003735744
  • 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
    4573118
  • 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  NDL  J-STAGE 
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