青藏块体及其周边地震活动的迁移

THE MIGRATION OF EARTHQUAKE ACTIVITY IN QINGHAI-TIBET PLATE AND IT'S PERIPHERY

摘要:

地震活动迁移是地震群体活动的一个特征。它可以反映地震构造带活动特点及其地震动力作用概况。本文研究了青藏块体及其周边地区强震空间分布随时间变化的规律,发现自1897年以来地震活动有自南而北,再由北向南的往返迁移规律,而且这种迁移与地震活跃期有明显的对应关系。在此基础上,讨论了本区地震动力作用的演变及发展,进而对本区第V地震活跃期今后几年地震活动发展的趋势进行了判断。

Abstract:

The migration of earthquake activity is a feature of earthquake activity,and it outlines both activity of seismotectonic zone and earthquake mechanics,In this paper,by studying the change regularity of spatial distribution of strong earthquake with time in Qinghai-Tibet plate and its periphery,it was found that earthquake activities had migrated from south to north then from north to south since 1978,and the migration had abvious relation with earthquake activity period.In view of the regularity,the evolution and development of the earthquake dynamics are discussed,thus the tendency of earthquake activities in the future few years is judged.