Abstract: The amplitude and peak period of earthquake wave spectrum increase with elevation rising on both sides of valley in the Wujiangdu reservoir Jiaojiaping earthquake area. Elevation rises a hundred meters, the amplitude increases about one times. Peak period of spectrum increases 0.1-0.3 second. The amplitude is related with earthquake incident direction. The amplitude on the sides nearer to epicenters is much larger than opposite one. According to relation between intensity and displacement amplitude of earthquake, it is suggested that if build a hundred meter dam, the intensity at the top would be 0.5-1.0 degree higher than in the bottom.

Key words: Wujiang Gorge, Amplitude, Spectrum, Intensity

摘要： 根据焦家坪地震区深峡谷两侧的密集台网观测结果,分析了峡谷两侧的振动特征。对修建在复杂地形条件下的大型水电工程场址地震微小区划问题进行了初步研究。并对断层带上的振幅异常作了分析。

关键词: 乌江峡谷, 地震振幅, 频谱, 烈度