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| 地表与井下地电阻率观测数据分析 | |
| 引用本文： | 刘君,杜学彬,陈军营,王建军,范莹莹.地表与井下地电阻率观测数据分析[J].地震,2015,35(1):112-122. |
| 作者姓名： | 刘君 杜学彬 陈军营 王建军 范莹莹 |
| 作者单位： | 1.中国地震局地震预测研究所兰州科技创新基地, 兰州 730000; 2.兰州地球物理国家野外科学观测研究站, 兰州 730000; 3.中国地震局兰州地震研究所, 甘肃 730000 |
| 基金项目： | 中国地震局预测研究所基本科研业务费专项，中国地震局专项 |
| 摘 要： | 本文介绍了目前中国运行时间超过2年以上的4个同场地地表和井下地电阻率观测台站的基本情况, 通过分析观测曲线动态变化、 观测精度以及映震能力, 得到以下初步结果: ① 井下地电阻率观测对风、 降雨以及杂散电流干扰的抑制能力要优于地表观测; ② 井下地电阻率观测年变化与地表有较大的差别, 且井下观测大大削弱了年变化幅度; ③ 井下垂直方向地电阻率观测数据相对水平方向来说阶跃及突跳较频繁; ④ 天水、 河源、 海安台井下观测对其附近地震有一定的映震能力。 |
| 关 键 词： | 井下观测 地表观测 地电阻率 |
| 收稿时间： | 2014-05-04 |
Assessment of Ground and Borehole Resistivity Data Observed from the Same Site |
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| LIU Jun,DU Xue-bin,CHEN Jun-ying,WANG Jian-yun,FAN Ying-ying.Assessment of Ground and Borehole Resistivity Data Observed from the Same Site[J].Earthquake,2015,35(1):112-122. | |
| Authors: | LIU Jun DU Xue-bin CHEN Jun-ying WANG Jian-yun FAN Ying-ying |
| Institution: | 1. Lanzhou Base of Insitiute of Earthquake Prediction, CEA, Gansu 730000, China; 2. Lanzhou National Observatory of Geophysics, Gansu 730000, China |
| Abstract: | This paper presents observational data of the 4 stations of surface and deepwell equipments which running time over 2 years at the same site and the same time period. By analyzing dynamic change of curves, observation accuracy and earthquake reflecting ability of the observed data, we concluded that ① Deep borehole resistivity observation better restrain interferences of winding, raining and stray currents ground observation; ② Annual variation amplitude of deepwell is different from surface resistivity observations and can greatly weaken the amplitude of annual variation; ③ Deepwell vertical observation data shows more frequently step offsets and sudden jumps relative to horizontal observation data; ④ Deepwell observation of Tianshui, Heyuan and Haian stations have good reflecting ability to earthquake nearby. |
| Keywords: | Deep-well resistivity observations Surface Resistivity observation Earth quake activity |
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