华北地区震群活动的阶段性特征

摘要

In this paper, we studied the earthquake swarms from 1970 up to now in theNorth China region. It is shown that the migration and the stage-by-stage activity of earth-quake swarms are obvious before Tangshan earthquake. The characteristics are preliminarilyanalyzed by using the theory of three-dimensional rheological inclusion earthquake generatingmodel. Predicted test of Zhangbei earthquake show that the migration and earthquake swarmsshould be applied to the medium-tem prediction of strong earthquakes.%通过对华北地区1970年以来震群活动的分析表明，唐山地震前的震群活动显示出一定的迁移性和阶段性。应用流变介质包体孕震模型的理论进行了初步力学分析。张北地震的预测检验表明，震群活动的迁移性与阶段性对强震的中期预测具有一定指导意义。