Effect of Noise from DC-Driven Trains to Geoelectrical Potential Difference and its Reduction in Hakuba Area, Japan
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- Ishikawa Hisashi
- Graduate School of Science and Technology, Chiba University
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- Hattori Katsumi
- Department of Earth Sciences, Faculty of Science, Chiba University
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- Takahashi Ichiro
- Graduate School of Science and Technology, Chiba University
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- Noda Yoichi
- Earthquake Prediction Research Center, Tokai University
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- Nagao Toshiyasu
- Earthquake Prediction Research Center, Tokai University
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- Isezaki Nobuhiro
- Department of Earth Sciences, Faculty of Science, Chiba University
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Abstract
The variations of geoelectrical potential differences in Hakuba area, Nagano Prefecture, Japan have been investigated. The noises originated from the DC-driven trains were found to contaminate the natural geoelectrical potential data. The most intense influence of trains occurred when the train was running nearby measuring dipoles. The gradient of the potential was deflected towards the railways and/or the position of the train, exhibiting a certain correlation between the power supply data at substation and the geoelectrical potential data at measuring sites. Extracting the high correlation part (r > 0.7), “idealized” train noise can be computed by the least square method. The reduction of train noise by more than 60 % was achieved by subtracting the idealized noise from observed data.
Journal
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- IEEJ Transactions on Fundamentals and Materials
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IEEJ Transactions on Fundamentals and Materials 127 (1), 41-47, 2007
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390001204593693696
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- NII Article ID
- 10018456909
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- NII Book ID
- AN10136312
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- ISSN
- 13475533
- 03854205
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- NDL BIB ID
- 8624056
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed