Abstract: In this paper, the enhancement of activity of moderate earthquakes before the M≥5 earthquakes in Henan province and its neighboring areas since 1970 has been studied. The study results show that: after anomaly for 2 years the probabili ty of earthquake occurrence is 0.75. The distance betw een the earthquake location and the first or last epicenter of the enhancement of activi ty of moderate earthquakes is less than or equal to 50km, and its probabili ty is 0.75. The error of prediction mag ni tude is from - 0.5 to 0.5. TheR-value is 0.68. The method show sbet ter result of prediction.

Key words: Earthquake prediction, Seismicity enhancement, Moderate earthquake, Henan