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震群是地震活动的一种形式.但对震群目前尚无统一定义,只是在构造地震中,根据最大地震能量占整个序列总能量的百分比将震群列为一种类型.岩石破裂试验表明,震群活动和高余震活动反映岩石整体性较差.实际观测表明,震群的孕育、发生和发展,不但与地质构造、介质特性有关,而且受大范围的区域应力场、一定范围的局部应力场控制.多年来国内外均对震群进行研究,为了区分震群与一般弱震、大震前的震群与一般震群,提出了前兆震群的概念,试图用震群预报未来的强震.朱传镇等在研究华北地区的震群
The swarm is a form of seismic activity, but there is no unified definition for the swarm, except that in the tectonic earthquake, the swarm is classified as a type according to the percentage of the maximum seismic energy to the total energy of the whole sequence. , The activity of the earthquake swarm and the activities of high aftershocks reflect the poor integrity of the rock.The actual observations show that the breeding, occurrence and development of the swarm are not only related to the geological structure and media characteristics but also affected by a wide range of regional stress fields, a certain range of local Stress field control.For many years, the earthquake swarm has been studied both at home and abroad. In order to distinguish the swarm and general weak earthquakes, large earthquakes and general swarms before earthquake, we put forward the concept of precursor swarm, Zhu Chuanzhen is studying earthquake swarms in North China