【摘要】 利用地下水进行地震预报和研究有比较明确的物理基础。长期的地下水观测记录了大量的震例[1~4]。天津地下水观测网含盖了不同的含水层,其中咸水层占有一定的比例。本文以宁河潘庄咸水井为例,对其出现的异常资料进行了系统分析,统计了异常与地震的对应关系,总结了该井水位的映震特征。结果表明,异常形态均属于突升—缓降的阶变型异常,具体表现出两种映震类型:①水位突升—水位转折下降—发震;②水位突升—水位转折下降—恢复到原水平—发震。上升幅度在几米以上,震后逐渐恢复;异常时间分布散,但异常超前时间仍以半年居多;异常幅度有随震级增高而增大、随震中距增大而减小的趋势等特点。更多还原

【Abstract】 The groundwater observation net in Tianjin covers different aquifer,and salty layers account for a certain proportion.Taking Ninghe Panzhuang salty water well as an example we analyzed the relation of water level anomalies with earthquakes,and summarized the characteristics of the anomalies.The results show that all the anomalies showed a jump-slow drop shape,and can be divided into two types:(1) jump-turning-drop-earthquake;(2)jump-turning-recover-earthquake.The magnitude of jump is usually at about several meters,and it recovers after earthquake.The time of anomaly is not concentrating,but mostly over half year.The magnitude of anomaly increases with the magnitude of earthquake,decreases with the epicentral distance.更多还原