嘉山地震台大地电场观测异常干扰研究
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摘要
地电场观测是地震电磁前兆观测方法之一,由于其观测物理量所受到的干扰因素较多,因此通过对嘉山地震台大地电场观测中常出现的地电阻率同场观测干扰、雷电干扰、降雨影响、电极极化、磁暴干扰等5种干扰和典型变化形态进行识别分析,可有效剔除干扰,从而为提取地震前兆信息,分析和运用地电场资料进行地震预报提供可靠依据,也为观测场地大致相同的其他台站提供参考。
Geoelectric field observation is one of the earthquake electromagnetic precursory observation methods.Due to the reasons for the observed variables,interference factors are more.In this paper,five kinds of interference and its typical changes,such as the interference encountered in the same field observation,lightning interference,rainfall,electrode polarization interference,storm disturbance are analyzed and recognized in Jiashan seismic geoelectric field observation.The interference are effectively eliminated so as to extract the information of earthquake precursors.The methods and analysis in this paper provide a reliable basis for the analysis and usage of the electric field data in the possible earthquake prediction,and also provides the reference for the stations with similar observation.
引文
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