Search Results 1-4 of 4

  • Application of statistical models to geoelectric variations with a long electrode span to detect anomalous changes

    Takayama Hiromi

    地電位の異常変化の迅速な検出を目指して、地磁気変化による誘導成分を除去する2つの方法を試した。1つは多次元回帰モデルを用いる方法で、もう1つはBAYTAP-Gを用いる方法である。前者は地電位変化を過去、現在、未来の地磁気変化の線形結合として表し、誘導電位変化は地磁気変化とモデルパラメータのコンボリューションとして推定される。後者は地電位観測値を潮汐、電磁誘導、トレンド、不規則の4成分に分離する。こ …

    Papers in Meteorology and Geophysics 54(1), 1-45, 2003

    J-STAGE 

  • A Study of Earthquake Prediction Method by Electric Self-potential Measurements  [in Japanese]

    Nagao Toshiyasu , Kono Yoshitery , Asai Yoshiya , Tanabe Yuji

    … Whether or not the geoelectric potential field exhibits anomalous changes before earthquakes that can be used for prediction is a matter of long-standing debate. … In Ishikawa Prefecture, central Japan facing the Japan Sea, two long span geoelectric potential monitoring systems have been in operation since March, 1991. … Anomalous geoelectric potential changes were recorded before each of these events. …

    Technical note of the National Research Institute for Earth Science and Disaster Prevention 166, 131-148, 1995-03-31

  • SELF-POTENTIAL OBSERVATIONS AT ACTIVE FAULTS (1)-OBSERVATIONS IN THE HOKURIKU OBSERVATION VAULT AND ON THE USHIKUBI FAULT-  [in Japanese]

    渡辺 邦彦 [他] , 小泉 誠 , 和田 安男 , 松尾 成光 , 平野 憲雄 , 住友 則彦

    Geoelectric phenomena seem to be sensitive to geophysical activities. … Therefore, experimental observations of self-potential variations have been carried out on the fault zones.A small-size fault runs throughout the observation vault of the Hokuriku observatory, Disas. …

    京都大学防災研究所年報 (35B-1), p313-322, 1992-04

    IR 

  • Self-potential anomalies associated with an active fault.

    MURAKAMI Hideki , MIZUTANI Hitoshi , NABETANI Sachio

    … In order to investigate fault activity, a self-potential survey was made near the surface faults of the 1896 Rikuu earthquake (<i>M</i>=7.2) in the Tohoku district of Japan. … The following characteristic changes of the self-potential were observed; …

    Journal of geomagnetism and geoelectricity 36(9), 351-376, 1984

    J-STAGE 

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