地幔波（mantle wave）是一种波及地幔深部的长周期面波。
我们利用这些高精度的走时数据研究了地幔体波的走时残差的范围及地幔非均匀性的强度。
These mantle body wave data are used to investigate the range of variations in the travel time residuals which indicate the degree of mantle heterogeneity.
本文是研究利用天然地震PS转换波及PPP等二次波到时资料反演地壳上地幔速度结构的尝试。
An inversion of velocity structure of crust and upper mantle by using converted PS wave and multiwave PPP etc, is reported in this paper.
这类PS转换波与初至P波之间的到时差，可用来测定地壳和上地幔构造。
The difference of arrival times between such PS and pp waves can be used to determine the structures in the earth's crust and upper mantle.
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