The azimuthal elastic anisotropy of the upper mantle of the Voronezh uplift is estimated from the data of three three-component broadband stations of the Voronezh seismic network: “Storozhevoe” (VSR), “Novokhopersk” (VRH), and “Galichia Gora” (LPSR) from SKS/SKKS splitting. Two parameters were calculated—the time shift between two quasi-shear waves (δt), which are formed when a shear wave (for example, SKS) passes through an anisotropic medium, and the azimuth of the axis of maximum speed α (axis of symmetry), along which a “fast” quasi-shear wave propagates. According to the data from different station, the anisotropic parameters are α = 40°, δt = 0.6 s (VSR); α = 40°, δt = 0.1 s (VRH); α = 40°, δt = 0.4 s (LPSR). Taking into account the relatively close location of the stations, all the data were summed up to yield α = 40°, δt = 0.4 s. As all obtained results are similar to each other and coincide with the direction of movement of the Eurasian plate, it is concluded that the anisotropy of the upper mantle in the region is relatively weak, has a northeast azimuth, and is caused by modern tectonic processes.

中文翻译：

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沃罗涅日隆起中部下地幔上地幔方位角弹性各向异性

沃罗涅日隆起上地幔的方位弹性各向异性是根据沃罗涅日地震台网“Storozhevoe”(VSR)、“Novokhopersk”(VRH)和“Galichia Gora”三个三分量宽带台站的数据估算的( LPSR) 来自 SKS/SKKS 分裂。计算了两个参数——当剪切波（例如，SKS）通过各向异性介质时形成的两个准剪切波（δt）之间的时移，以及最大速度轴 α（轴的轴）的方位角。对称性），“快速”准剪切波沿其传播。根据不同台站的数据，各向异性参数为α=40°，δt=0.6 s（VSR）；α = 40°，δt = 0.1 s (VRH)；α = 40°，δt = 0.4 s (LPSR)。考虑到台站位置相对较近，所有数据相加得到α=40°，δt=0.4 s。