本文利用1987年8月在江西省寻乌发生的三次5.0级以上地震的记录资料,讨论了我国东南地区π_g波的传播特征。结果表明:π_g波的初至波速为6.00km/s,与Press的结果相近;π_g波有明显的频散特征,其卓越周期为0.6—0.8秒,较多表现为正常频散,同时也有少量表现为反常频散,由π_g波的波数及波峰的水平合成矢量得到的振幅辐射图象,基本上与弱非均匀介质辐射图象相近;π_g波各波数水平到时与垂直到时存在明显的到时差。 Based on the recorded data of three magnitude 5.0 earthquakes occurred in Xunwu, Jiangxi Province in August, 1987, this paper discusses the propagation characteristics of π_g wave in southeastern China. The results show that the first wave velocity of π_g wave is 6.00km / s, which is similar to that of Press. The π_g wave has obvious dispersion characteristics, and its excellent period is 0.6-0.8 second, which shows more normal dispersion and smaller amount The amplitude radiation image obtained from the wave number of π_g wave and the horizontal composite vector of the peak is basically similar to the radiation image of the weak inhomogeneous medium. There is obvious To the time difference.