Geoelectric study using the leak current from railroad as a signal - Application to Ohtawa station, Gifu Prefecture, Japan
Geoelectric study using the leak current from railroad as a signal - Application to Ohtawa station, Gifu Prefecture, Japan
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DOI：
10.2183/pjab.78.179
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发表时间：
2002-09-01
影响因子：
3.1
通讯作者：
Sakai, H
中科院分区：
文献类型：
--
作者：
Tanbo, T;Nagao, T;Sakai, H
自1997年以来，在大泽站（岐阜县神冈镇）进行了地电位差观测。由于人工电噪声小，数据质量一般都很好。然而，地电势却呈现出尖尖状的强烈变化。这些变化的发生与立山铁路直流驱动列车时刻表有明显的相关性，其中距大泽站最近的距离约为16 kin。利用这些地电势变化来研究地面局部电阻率及其时间变化。我们的分析表明视电阻率有季节变化。虽然仍不确定，但也有迹象表明，地电势变化的标准差可能与当地的地震活动有关。
Observation of geoelectric potential difference has been conducted since 1997 at Ohtawa station (Kamioka Town, Gifu Prefecture). The data quality is generally excellent because of small artificial electric noises. However, spiky strong changes of geoelectric potential are observed. Occurrences of these changes are clearly correlated with the DC driven train schedules of Tateyama Railway, of which closest distance from Ohtawa station is about 16 kin. These geoelectric potential changes were used to study the local electrical resistivity of the ground and it's time variation. Our analysis has shown a seasonal variation of apparent resistivity. Although still uncertain, there is also an indication that the standard deviation of the geoelectrical potential changes may be related to the local seismic activity.