Abstract: On the base of data collection and on-the-spot investigation,this paper studies some characteristics of the Hujiaping M_S4.1 earthquake on 22 November, 2008 in Guizhou township, Zigui county, Hubei province, and the geology-hydrogeology condition and earthquake active background in the area. The earthquake disaster are investigated and analysed. Some scientific problems on earthquake precursors and causes of the earthquake are discussed. In our opinion, the Hujiaping M_S4.1 earthquake is a reservoir-induced earthquake belonging to tectonic type,induced by reservoir water-loading and water infiltration along the Xiannvshan fault,and there are some indications that the cause of earthquake possibly relates to the 2008 Wenchuan earthquake influence on the stress field of this region.

Key words: The Three Gorges Dam, Xiannvshan fault, Reservoir-induced earthquake, Hujiaping M_S4.1 earthquake