根据大同遥测地震台网记录到的小震群资料，用组合模式理论［１］对本区的小震群时空演化规律进行了分析研究。结果表明，对于１９８９年１０月１８日在本区发生的大同—阳高５．８级地震，利用震前小震群资料得出的预报震中与实际震中有较好的一致性。另外，通过震群与外因相关性的分析，对发震时间的预报也取得了较好的效果 According to the data of small swarms recorded by Datong Telemetered Seismograph Network, the temporal and spatial evolution of small swarms in this area was analyzed with the combinatorial model theory [1]. The results show that for the Datong-Yanggao 5.8 earthquake that occurred in this area on October 18, 1989, the predicted epicenter obtained from the data of small earthquakes before the earthquake has good consistency with the actual epicenter. In addition, through the analysis of the correlation between the swarm and the external cause, the forecast of the occurrence time of the earthquake also achieved good results