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利用经验类比的方法，对1999年11月29日岫岩偏岭5．6级地震前震群序列及以往在辽宁地区发生的典型具有预报意义的1988年2月25日彰武4．8级地震前岫岩偏岭前兆震群和1975年2月4日海城7.3级地震前震序列进行了详细研究．结果显示，1999年11月29日岫岩偏岭5．6级地震前震群序列与1975年2月4日海城7．3级地震前震序列的统计特征及性质相同，因此，认为该序列属于前震序列．同时，还提出了将序列的表象特征与其参数特征相结合的识别序列性质的方法．
Based on the empirical analogy method, the series of earthquake swarm before the Xiuyan P5.5 earthquake on November 29, 1999 and the typical forecasting significance occurred in Liaoning Province on February 29, Former Xiuyan Pianling precursor earthquake swarm and Feb. 4, 1975 Haicheng MS 7.3 earthquake sequence was studied in detail. The results show that the sequence of earthquake swarm before the Xiuyan P5.5 earthquake on November 29, 1999 is the same as that of the pre-Haitian MS7.0 earthquake on February 4, 1975. Therefore, it is considered that the sequence belongs to Foreshock sequence. At the same time, a method of recognizing the nature of the sequence by combining the appearance features of the sequences with their parametric features has also been proposed.