“平面图形演化方法”是利用无量刚的异常信息量来反映震前异常空间分布及其随时间的演化，从而预报发震时间和地点的一种方法。这种方法由μ值等值线图法、μ值异常平面图法组成。它是通过绘制不同时间的上述二种平面图，通过分析水位、水化异常于震前在时间上、空间上的演化规律，寻找μ值异常集中区或高值区、异常丛集图像分布区、条带图像分布带及条带交叉图像地区，并考虑异常分布图像与活动构造带和地震带的关系，从而对强震发生的时间与地点进行预测 “Plane graphical evolutionary method” is a method to predict the occurrence time and location by using the infinitesimal quantity of abnormal information to reflect the anomalous spatial distribution before the earthquake and its evolution with time. This method consists of μ-value contour plot method and μ-value anomaly plot method. It is through the mapping of the above two kinds of plans at different times, by analyzing the water level, hydration anomalies before the earthquake in time and space evolution, to find the μ value of abnormal concentration or high value area, abnormal cluster image distribution area, With the image distribution zone and the cross-image area of ​​the belt, and the relationship between the anomalous distribution image and the active tectonic zone and the seismic zone is taken into account to predict the time and location of the strong earthquake