| 与气压有关的地电场特征及机理研究 |
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| 引用本文： | 李学波,卫定军,李学涛,罗龙.与气压有关的地电场特征及机理研究[J].地震学报,2023,45(1):62-75. |
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| 作者姓名： | 李学波 卫定军 李学涛 罗龙 |
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| 作者单位： | 1.中国银川 750001 宁夏回族自治区地震局 |
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| 基金项目： | 宁夏自然科学基金（2021AAC03484）和地震科技星火计划（XH20065Y，XH20064）共同资助 |
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| 摘 要： | 使用宁夏四个地电台站记录的地电场数据，研究其变化特征、频谱特征、与区域气压变化的关系及测量方向与附近断裂走向的关系。研究结果显示：部分地电场具有日变化特征，同时也具有气压非周期性变化特征，这种特征与气压变化呈负相关，当场地裂隙优势方位与附近断裂带方位呈近似垂直或较大夹角时，测向与附近断裂走向近垂直的地电场与气压相关性较高。分析认为地电场具有气压非周期变化特征是因为测量位置基岩孔隙的渗透率与附近断裂裂缝的渗透率不同，流体渗流过程中气压系统变化引起的流体“窜流”所致。
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| 关 键 词： | 地电场 气压 非周期 变化特征 |
| 收稿时间： | 2021-07-25 |
Feature and mechanism of geoelectric field related to atmospheric pressure |
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| Affiliation: | 1.Earthquake Agency of Ningxia Hui Autonomous Region，Yinchuan 750001，China2.Ningxia Natural Resources Assets Statistical Accounting Center，Yinchuan 75002，China |
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| Abstract: | Using the geoelectric field data recorded by four geoelectric stations in Ningxia, the variation characteristics, spectral characteristics, the relationship with regional pressure variation, and the relationship between the measuring direction and the strike of nearby faults are studied. The research results show that part of the geoelectric field has diurnal variation characteristics, and also has the characteristics of non-periodic variation of atmospheric pressure, which is negatively correlated with the variation of atmospheric pressure, and the correlation is related to the angle between the measuring direction and the strike of nearby faults. It is considered that the geoelectric field has the characteristics of non-periodic change of atmospheric pressure is caused by the fluid “channeling” resulting from the change of air pressure system in the seepage process, which is due to the permeability difference between the bedrock pores and the nearby fault fractures. |
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