It is essential to evaluate global tomography models, which provide important information for understanding Earth's structure and dynamics. Long‐period surface waves propagating between antipodal stations are good candidates for this purpose since they depend on global‐scale velocity variations in the upper mantle. In this study, we extract minor‐arc and major‐arc Rayleigh waves from ambient noise cross correlations between GEOSCOPE station AIS and ∼1,800 USArray stations near the antipode of AIS. We identify two Rayleigh‐wave‐focusing regions and simulate the observed maximum amplitude pattern at the antipodal region using synthetic surface waves based on three global tomography models. Our simulations suggest that seismic heterogeneity of the tomography models need to be inflated by a factor of 2–3 in oceanic regions to explain the observed focusing pattern of surface waves near the antipodal region.

中文翻译：

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使用对立环境噪声互相关函数评估全局层析成像模型

评估全球层析成像模型至关重要，该模型可为了解地球的结构和动力学提供重要信息。为此，在对映台之间传播的长周期表面波是一个很好的选择，因为它们取决于上地幔的整体尺度速度变化。在这项研究中，我们从GEOSCOPE台站AIS与AIS对映点附近的约1,800个USArray台站之间的环境噪声互相关中提取了小弧和主弧瑞利波。我们确定了两个瑞利波聚焦区域，并使用基于三个全局层析成像模型的合成表面波模拟了在对映区域观察到的最大振幅模式。