岐阜県大多和で観測された直流電車のレール漏れ電流による地電位差変化の研究 Study on geoelectric potential caused by rail leak current observed at Ohtawa, Gifu, Japan

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Observations of geoelectric potential have been conducted since 1997 at Ohtawa (Kamioka town, Gifu prefecture) for the purpose of testing VAN method (short-term earthquake prediction), as a collaborative research of Toyama University and RIKEN-IFREQ. The data from Ohtawa station are obtained in excellent condition for geoelectric potential study because of small artificial electric noises. A relatively strong change of geoelectric potential is observed. This is clearly correlated with the timetable of Tateyama railway. That is, the geoelectric potential change is caused by the leakage current from DC train of Tateyama railway. The current travels through more than 16km distance. The geoelectric potential changes caused by the leak current of Tateyama railway may be useful to study a electrical resistivity of the soil and it’s time variation around the area. A time variation of largest amplitude of the rail leak current has been analyzed since April 1998, to obtain the variation of apparent resistivity. So far, there has not been sensible correlation for apparent resistivity variation and an inert seismic activity. In contrast, it is remarkable that the resistance changes gently in a cycle of one year. The gentle variation of resistivity is thought to be caused by annual or seasonal phenomenon. The leakage of the current from DC train is a powerful tool to monitor temporal variation of resistivity structure around the area.

収録刊行物

  • 電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society

    電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society 122(5), 446-453, 2002-05-01

    一般社団法人 電気学会

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各種コード

  • NII論文ID(NAID)
    10008218335
  • NII書誌ID(NCID)
    AN10136312
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03854205
  • NDL 記事登録ID
    6152573
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-793
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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