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本文研究了1967年3月27日河间发生的6.3级地震序列活动特征,经分析认为,这次地震属主震余震型,整个地震序列时起时伏,具有密集、平静、发震特点;应变释放有阶段性,初期P值大,衰减快,b值低,空间分布集中。据此,我们认为河间地震不是孤立的,是华北地震活动期最近一幕强震整体活动中的组成部分,河间地震的发生与华北统一应力场有关。
This paper studies the sequence of the M 6.3 earthquake sequence occurring on March 27, 1967 in Hejian. Based on the analysis, it is believed that this earthquake belongs to the main shock aftershock pattern, and the whole seismic sequence fluctuates with time and has the features of dense, calm and seismogenic activity. Strain release stage, early P value, fast decay, b value is low, the spatial distribution of concentration. Accordingly, we believe that the Hejian earthquake is not isolated and is part of the overall earthquake activity in the recent earthquake in North China. The occurrence of the Hejian earthquake is related to the unified stress field in North China.