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本研究旨在解决地震序列中强余震持续时间的早期估计问题。文中首先给出了强余震的震级定义，指出：主震型与强震群型序列的强余震持续时间存在差异。使用模式识别方法对主震型序列中强余震持续时间大于１天、小于１天及无强余震等３种情况进行划分之后，给出了两类序列的强余震持续时间与序列第一大震震级的粗略相关关系。最后，给出了对于不同序列类型进行强余震持续时间估计的判断依据。
This study aims to solve the early estimation of the duration of strong aftershocks in seismic sequences. The paper first gives the magnitude definition of strong aftershocks, and points out that the durations of strong aftershocks of the main shock and strong swarm are different. Using the pattern recognition method to classify the strong shocks lasting more than 1 day, less than 1 day and no strong aftershocks in the main shock sequence, the durations of the strong aftershocks of the two types of sequences are compared with those of the first large earthquake Rough correlation between magnitude. Finally, the judgment basis for estimating the duration of strong aftershocks for different sequence types is given.