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介绍了陕西省前兆台网记录到的几例特殊的无震异常．分析了这些异常产生的原因．认为１９８６ 年和１９９６ 年渭南双王井水位的２ 次无震异常与渭河的洪峰有关；１９７７ 年韩城地震台地倾斜特大异常可能与黄河水位变化有关；１９８３ 年安康地震台地倾斜特大异常与该地区特大洪水有关；１９９６ 年和１９９８ 年三原井水位的２ 次特大异常可能与附近的冯村水库蓄水有关
A few special cases of earthquake-free anomaly recorded by precursor network in Shaanxi Province are introduced. Analyze the causes of these anomalies. It is concluded that the two anomalies of the Shuangwang Weijing water level in 1986 and 1996 are related to the flood peak of the Weihe River. The large anomaly of tilt of the Hancheng seismic station in 1977 may be related to the water level change of the Yellow River. In 1983, 2 major abnormalities in the water level of Sanyuan well in 1996 and 1998 may be related to the storage of Fengcun reservoir in the vicinity