摘要
Based on the retrospective study of seismic data before the Taikang ML5.0 earthquake, occureed on Oct. 24, 2010 in Henan Province, this paper believed that there existed abnormal phenomena before the earthquake, including the enhancement of moderate earthquakes in the area, weak seismic band, seismic quiescence, high frequency abnormality of earthquake window after Huoshan earthquake etc. It accumulates material for monitoring and prediction of the moderate earthquake in this region.