本文总结了我国大震前地下水异常的共同特征,表明异常的分布区域呈椭圆状和四象限,其长轴与发震构造和等震线相一致;在极震区及其两端,异常变化幅度最大,出现时间较晚。异常呈间歇性出现,形成多次高潮。根据上述特征,本文探讨了判断未来地震的震中、震级、发震时间与震源深度的经验性规律。作者认为,震前的预位移和层间解缚是造成地下水异常的主要原因。 This paper summarizes the common features of groundwater anomalies before the great earthquakes in China, indicating that the distribution of anomalies is elliptical and four-quadrant, and its long axis is consistent with the seismogenic structure and isoseismic line. In the extreme earthquake zone and its two ends, the anomalous changes Largest, appeared late. Abnormal was intermittent, forming a number of orgasm. According to the above characteristics, this paper explores the empirical law of determining epicenter, magnitude, onset time and focal depth of future earthquakes. The author believes that pre-earthquake pre-displacement and stratification is the main reason causing groundwater anomalies.