【摘要】 通过对北部湾６．１、６．２级地震的时空分布及地震类型的分析，认为北部湾地震属双主震型序列。６．１级地震的余震序列表现出鲜明的主余震型序列特征，而６．２级地震的余震序列震群型特征较为突出。６．２级地震前，地震序列活动显示出应变释放加速、低ｂ值、加卸载响应比跃升等异常现象。更多还原

【Abstract】 By analyzing the temporal and spacial distribution and seismic type of the Ms6.1 and Ms6.2 earthquakes occurred in Beibuwan,we think that the type of Beibuwan earthquake is belong to twomainshocks type.The aftershocks of the Ms6.1 earthquake presented sharp feature of mainshockaftershock sequence;and that of the Ms6.2 earthquake mainly a cluster type sequence.Before the Ms6.2 earthquake,the activity of the seismic sequence showed some anomalies,such as strain release accelerating,low b-value and load-unload response ratio rising fast et al.更多还原