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Both the current and the potential electrodes have been installed in an observation bore hole drilled very close to the Yamasaki fault in Hyogo prefecture. Electric currents of a rectangular wave form of an amplitude of 10 mA with a period of 10 second are being applied between the current electrodes and the apparent resistivity is computed from the potential difference measured between the adjacent potential electrodes. It was found that the apparent resistivity had increased about 10% between March and September, 1980. After that it gradually decreased. Superposed on this gradual change are small fluctuations closely related to changes in the water level in the bore hore. An examination of these short period fluctuations indicates that the apparent resistivity increases about 0.7 % for a one meter rise in water level with a time lag of 8 hours. 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観測井を利用した山崎断層の比抵抗連続観測
https://doi.org/10.15083/0000033024
https://doi.org/10.15083/0000033024839a676f-834c-402a-aa94-f85b74fb97a7
名前 / ファイル | ライセンス | アクション |
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ji0563010.pdf (1.2 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-05-30 | |||||
タイトル | ||||||
タイトル | 観測井を利用した山崎断層の比抵抗連続観測 | |||||
言語 | ja | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15083/0000033024 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | Continuous Observation of Earth Resistivity by Means of the Electrical Well Logging Method in a Bore Hole near the Yamasaki Fault | |||||
著者 |
吉野, 登志男
× 吉野, 登志男× 行武, 毅 |
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著者別名 | ||||||
識別子 | 128757 | |||||
識別子Scheme | WEKO | |||||
姓名 | Yoshino, Toshio | |||||
著者別名 | ||||||
識別子 | 128758 | |||||
識別子Scheme | WEKO | |||||
姓名 | Yukitake, Takesi | |||||
著者所属 | ||||||
著者所属 | 東京大学地震研究所 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The electrical well logging method has been applied for continuously measuring the earth resistivity. Both the current and the potential electrodes have been installed in an observation bore hole drilled very close to the Yamasaki fault in Hyogo prefecture. Electric currents of a rectangular wave form of an amplitude of 10 mA with a period of 10 second are being applied between the current electrodes and the apparent resistivity is computed from the potential difference measured between the adjacent potential electrodes. It was found that the apparent resistivity had increased about 10% between March and September, 1980. After that it gradually decreased. Superposed on this gradual change are small fluctuations closely related to changes in the water level in the bore hore. An examination of these short period fluctuations indicates that the apparent resistivity increases about 0.7 % for a one meter rise in water level with a time lag of 8 hours. On the other hand, the gradual increase of 10% in the resistivity observed between March and September is supposed to be a part of the seasonal variations. It was found that this change could be well correlated to the seasonal change in strain observed by an extensometer installed in the direction of N56°E in a tunnel across the Yamasaki fault about 10 m from the bore hole. Although the bore hole used for this experiment is only 20 m deep, the present technique will be applicable in deeper wells to measure the resistivity of the deeper crust. | |||||
書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 56, 号 3, p. 603-621, 発行日 1982-01-08 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00408972 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162258 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
日本十進分類法 | ||||||
主題 | 453 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | 東京大学地震研究所 | |||||
出版者別名 | ||||||
Earthquake Research Institute, University of Tokyo |