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从大震前中小地震活动有个增强的过程和大地震常常发生在异常区外围的现象出发，提出用描述地震分布时、空、强基本特点的空间集中度Ｃ、地震危险度Ｄ和地震强度因子Ｍｆ进行交汇预测未来震中位置。应用在华东地区的震例一般预测位置可达１°～１．５°半径，并能较好地避免单值预报的虚报、漏报。
Starting from the phenomenon of an enhanced process of the middle and small earthquakes before the earthquake and the frequent occurrence of large earthquakes in the periphery of the anomalous region, this paper proposes that the spatial concentration C, the earthquake risk D and the seismic intensity The intersection of factor Mf predicts the position of future epicenter. The earthquakes applied in East China are usually predicted to have a radius of 1 ° -1.5 ° and can avoid the false and omission of single-valued forecast.