Abstract —Two methods for estimating station anomalies in teleseismic P - and S -wave traveltimes are considered. Both methods employ traveltimes of the conversions from the upper boundary of the mantle transition zone. The first method directly uses traveltimes of the converted waves; in the second method, the sought parameters are estimated based on a simple two-layer model. The both approaches yield commensurate values ​​for the coefficient of correlation between station anomalies of P - and S -waves. The use of the model complicates the calculations but makes it possible to directly obtain the estimates of the average values ​​of the seismic parameters of the mantle. The observation data for northern Finland are used to illustrate the discussed subject.

中文翻译：

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转换波远震走时的台站异常

摘要 — 考虑了两种估算远震 P 波和 S 波走时中台站异常的方法。两种方法都使用地幔过渡带上边界转换的旅行时。第一种方法直接使用转换波的走时；在第二种方法中，所寻求的参数是基于一个简单的双层模型来估计的。这两种方法对 P 波和 S 波台站异常之间的相关系数产生相称的值。该模型的使用使计算复杂化，但可以直接获得地幔地震参数平均值的估计值。芬兰北部的观测数据用于说明所讨论的主题。