本文根据二个阿留申群岛核爆炸事件在中国大陆地震台站的记录,运用广义射线方法,测定了其相应的t~*值,为了解中国大陆地壳与上地幔地震波衰减与介质特性提供一重要参数。并就t~*值在中国大陆区域的分布特征及其构造意义作了探讨。同时讨论了t~*值的测定在确定核爆炸当量上的应用。 Based on the records of the two Aleutian Islands nuclear explosions at the seismographic stations in mainland China, the corresponding t ~ * values ​​were determined by using the generalized ray method, which provided an important understanding of the seismic attenuation and dielectric properties of the crust and upper mantle in China parameter. The distribution characteristics of t ~ * value in the Chinese mainland and its tectonic significance are also discussed. At the same time, the application of determination of t ~ * value in determining nuclear explosion equivalent was discussed.