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分析了地磁垂直分量日变幅逐日比值的高值异常与其后地震的关系，发现它们之间有良好的对应，通过分析地磁垂直分量谐波幅度的逐日比，作者认为这种高值变化可能与其间地下介质电阻率下降有关，但也有可能是外场变化所致。
By analyzing the daily ratio of harmonic amplitude of geomagnetic vertical component, the author thinks that this high value change may be related to the post-earthquake high frequency anomaly of earthquakes and its subsequent earthquakes. In the meantime, it is related to the decrease of the resistivity of the underground medium, but it may also be caused by the change of the external field.