临汾地震台大地电场远震前异常特征分析

利用多极距噪音排除等方法,对临汾地震台记录到的几次典型的远震信号进行分析研究。主要结论如下:①地电场远震变化的主要特征为在震前数小时至2天出现比较明显的扰动变化,该变化在长短极距上记录结果的一致性较好,即变化形态和变化幅度基本相当,且变化具有比较强的指向性特征;②该远震变化出现时间似乎与震中距有一定的关系,与震级关系不很明显;③该远震变化的产生可能与临汾地震台所处地质构造背景及地下介质特性关系密切,其关联性尚需分析研究。

Analysis on anomaly characteristics of geoelectric field of Linfen Seismic Station before teleseismic events

In this paper, using multi-dipole eliminating noise method, several typical teleseismic signals recorded by Linfen Seismic Station are analyzed. The main conclusions are as follows. First, the main variation characteristics of the geoelectric field preceding teleseismic are the obvious changes in disturbance of the earthquake occurred a few hours to 2 days. The changes recorded in the long and short polar distance are in good agreement- morphology of changes is roughly equal to the magnitude, and the changes have stronger directional characteris- tics. Second, the time of variation occurred teleseism seems to have a certain relationship with epicenter distance, not the magnitude. And the third, the produce of variation occurred teleseism seems to have a consanguineous characteristics of material of Linfen station, relationship with the geological background and their relationship needs further analysis.