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本文利用水平层状介质模型及其响应系数理论对四川郫县台1984年五种不等极距的实测资料进行了反演。结果表明:反演得到的各层等效电阻率曲线可以直观、清晰地反映地下介质内部发生的物理过程。由于反演后能把表层季节干扰的非震变化从实测曲线中“检测”出来,从而得到探测范围内深层的平稳过程,这样对于在蕴震时段识别可能的前兆提供了一个良好的背景。因此进行多极距观测和反演可能会把地电阻率法预报地震的探索工作推向深入。
In this paper, the horizontal stratified medium model and its response coefficient theory were used to invert the measured data of five kinds of unequal polar distances in 1984 in Qiong County, Sichuan Province. The results show that the equivalent resistivity curves obtained from the inversion can intuitively and clearly reflect the physical processes occurring inside the underground medium. Since the inversion can detect the non-seismic changes of surface seasonal disturbance from the measured curve, the deep smoothing process in the detection range can be obtained, which provides a good background for identifying possible precursors during the period of implication. Therefore, multipole observation and inversion may further explore the earth resistivity prediction earthquake.