通过对昆明地震台水管倾斜仪多起前兆异常变化进行观测环境和观测系统现场调查核实,结合异常变化特征,分析其可能的干扰因素,发现引起此次异常变化的是环境干扰和仪器本体,排除地震前兆异常的可能。
By verifying the abnormality of the water-tube instrument and observing envi-ronment,we found out the reasons of these abnormalities are because of environment and in-strument rather than the earthquake.