张家口地区地震活动与地质构造关系

依据张家口地区1996年1月1日至2015年12月31日发生的1 748个地震的震中分布,结合该区地震地质、构造等研究成果,通过对该区历史上破坏性地震和大量中小地震的时空分布特征进行分析,发现地震多集中在几组活动断层交汇区及活动断层两端、拐点、分支、分叉部位和断陷盆地边界(沉降幅度差较大地区)部位,可能是因为这些部位是应力易集中地区。该结论可为张家口地区地震预报提供初步背景参考。

The relationship between seismic activity and geological structure in Zhangjiakou area

According to the Zhangjiakou area 1 748 earthquakes epicenter distribution from January 1, 1996 to December 31, 2015, combined with the existing seismic geological structure of the area, research results, through the analysis of the spatial and temporal distribution characteristics of the history of the devastating earthquake and a large number of small and medium earthquake, earthquake found more concentrated in several groups of active fault zone and active fault intersection ends, inflection point. Branch, the branch part and faulted basin boundary (settlement difference area) site, probably because the site stress area. This conclusion provides a preliminary background reference for earthquake prediction in Zhangjiakou area.