赤城台水位异常与地震关系的研究

The relation between the water level of Chicheng station and earthquake

利用原始曲线法、差分分析法、水位变差分析法对赤城台1991～2002年的水位观测资料进行异常识别,得出该台水位异常与地震存在以下关系①赤城台水位出现阶变异常或脉冲异常时多为临震异常,异常开始3～20天左右发震;②出现破年变异常时多为中短期异常;③赤城台水位对于东偏南、西偏北方向的地震异常反应明显,南北方向的则不十分明显。利用单台综合信息函数判定,对于赤城台水位观测井周围350km范围内ML≥5.0的地震映震率达67%,说明赤城台水位具有较高的映震能力。

By use of primitive curve method,difference method,water level difference analytic method,the observed data of Chicheng water level for one year had been performed abnormal identification.The following relation exists between earthquake and water level:① Chicheng station water level appeared steps or pulse before about 3 to 20 days earthquake occurred.② A middle or short term anomaly was broken year;③ The response of water level is obvious to the earthquake of the direction of east south and west north,but north and south direction is not obvious.Using single platform integrated information function judge,Chicheng station water level well can reflect earthquakes with M L≥5.0 around 350 km range up to 67%.It indicates that Chicheng station water level has higher reflecting ability.