The short-base levelling data at Zhangdaou is analysed by the moving AR spectrum analysis.
用滑动AR谱分析方法对唐山地震前后的张道口短水准资料进行了分析。
The total amplitude of anomaly is about 2mm (the base line of the short levelling is 26 meters).
总异常幅度约为2毫米左右（短水准基线为26米）。
The total amplitude of anomaly is about 2mm (the base line of the short levelling is 26 meters).
总异常幅度约为2毫米左右（短水准基线为26米）。
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