新疆及边邻地区7级以上地震前后北天山地下流体动态的异常变化

重点分析了新疆及边邻地区1980年以来6次7级以上地震前后北天山地下流体动态异常资料，其中3次地震前地下水有短期前兆异常变化，震时同震地震波效应普遍存在，震后异常十分突出且幅度大；以水位为主的水动力学效应反映了大区域应力调整过程具有不可逆特征。水文地球化学参数的变化不敏感。讨论了地下水远程效应与井震距离的关系以及阶跃异常的幅度等问题。

THE DYNAMIC ABNORMAL VARIATION OF UNDERGROUND FLUID IN THE NORTH TIANSHAN MOUNTAIN BEFORE AND AFTER EARTHQUAKES WITH MORE THAN MS7 IN XINJIANG AND ITS ADJACENT AREAS

We analyzed chiefly the dynamic abnormal data of underground fluid in the North Tianshan Mountain before and after 6 earthquakes with more than M_S7 since 1980 in Xinjiang and its adjacent areas. Before 3 earthquakes of them, the underground water appeared prognostic abnormal variation in short-term. When earthquakes occurred, the effect of coseismal wave existed universal. After earthquakes occurred, the anomaly was very evident and its amplitude was big. The effect of dynamics which mainly is the water level reflected the consolidation process of the big region stress. And it has an irreversible characteristic. The variation of the hydrogeochemistry parameter is insensitive. We discussed the relation between the remote effect of underwater and the well shock distance, the amplitude of step anomalies and so on.