山西大同台短水准的异常识别

给出４点组斜率信息法的理论模型，分析了大同台短水准测量结果，证明几次中强地震前大同台短水准均有明显的中、短期异常；同时发现跨断层测站高差曲线能较好地反映震前短、临异常的变化。

Anomaly Recognition and Analysis for Short range Leveling at Datong Station

The paper gave the theoretical model of the 4 points group gradient information method,analyzed the results of the short range leveling at Datong station,proved that the obvious medium and short range anomalies occurred before the moderately strong earthquakes;and discovered that the difference of elevation of the cross fault observatories can show variation of short impending anomaly before eathquakes.