Abstract: The Wuxijiang reservoir area has been considered to be geologically and seismologi-tally stable,but frequent microearthquakes were observed in the middle part of the reservoir area after impounding.On the basis of geologic field-work and seismic data,we have described and analysed the seismogeological background of this area,the geological environment of the reservoir,the geological conditions of the epicentral area and the features of the reservoir-induced seismicity.The conditions which induced earthquakes during impounding of the reservoir were compared with those in the Xinfengjiang reservoir.And the trending reservoir-induced seismicity was appraised by using seismogeological anlogic method.During the flood season in 1983,the water level of the reservoir was first over the normal one and the seimicity did not exceed our appraisals.

摘要： 乌溪江水库区原被认为是一稳定地区,但蓄水后库区中段发生了频繁的小震。本文根据现场地质调查和测震资料,对区域地震地质背景,库区地质环境、震中区地质条件和水库地震特征等,进行了分析论证,并与新丰江水库的诱震条件作了对比,运用地震地质类比法,对水库诱发地震的发展趋势作出了评价。1983年汛期该库首次蓄至正常高水位,地震的发展没有超出本文的估计。