从大震前中小地震活动的增强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 进行交汇预测未来中强地震 ,应用于华南地区的震例一般预测半径范围为 2° ,并总结了综合异常的中短期特征。 Starting from the phenomenon of the enhancement of the small and medium-sized seismic activity before the earthquake and the phenomenon that the large earthquakes often occur in the periphery of the abnormal area, this paper proposes that the spatial concentration C, the earthquake risk D and the earthquake intensity factor Mf For the prediction of the future moderate-strong earthquakes, the prediction radius of the earthquake cases applied to South China region is 2 °, and the mid-short term characteristics of the comprehensive anomaly are summarized.