初步建立了一种能反映地震前兆时空演化全貌的无量纲、归一化可迭加的信息场———综合前兆场．通过对研究区（东经１１３°～１２５°，北纬３２°～４４°）前兆场时空演化过程的分析发现，地震前前兆场由正常的低值离散逐渐发展为围绕震中呈高值封闭状态，震后恢复正常．该方法的独特之处在于，避开了某些单项异常对应某具体源的分析，而是只考虑异常．根据前兆场的变化可以确定震源的大致位置 A dimensionless, normalized and superimposable information field that can reflect the whole picture of the temporal and spatial evolution of the earthquake precursors has been preliminarily established --- the integrated precursor field. By analyzing the temporal and spatial evolution of precursor fields in the study area (113 ° -125 ° East longitude and 32 ° -44 ° North latitude), it is found that the pre-earthquake precursor field gradually developed from the normal low value dispersion to the high value enclosed state around the epicenter, After returning to normal. The uniqueness of this method is that it avoids the analysis of some single anomalies corresponding to a specific source, but only considers the anomalies. The approximate location of the source can be determined based on changes in precursor fields