中文摘要：

我们的研究表明,大多数地震区每轮孕育周期标志性地震事件前,会发生显著前震.本文基于孕震断层多锁固段脆性破裂理论以及震例分析,提出了前震事件判识方法.研究表明,前震事件的判识只与距CBS临界值的距离有关,而与距标志性地震事件发生的时间和空间距离无关;前震事件并非前人所述的小地震序列,而是较大地震.

英文摘要：

It is found from our studies that the significant foreshock events may occur prior to the characteristic earthquakes of each seismogenic period for most of the seismic zones. The identification method of foreshock events is presented in this paper,based on the brittle failure theory of multiple locked patches in a seismogenic fault system and earthquake case analysis. It is shown here that the recognition of foreshocks,which are not small earthquakes suggested by previous studies but are relatively large ones,is only associated with the distance from the critical value of CBS but is irrelevant to the spatial distance and occurrence time of the characteristic earthquakes.