Fig. 5

The surface logarithmic plot of \({Z}_{xy}^{\mathrm{inf}}(s)\), \({Z}_{yx}^{\mathrm{inf}}(s)\), \({Z}_{xx}^{\mathrm{inf}}(s)\), and \({Z}_{yy}^{\mathrm{inf}}(s)\), and \({T}_{x}^{\mathrm{edge}}(s)\), and \({T}_{y}^{\mathrm{edge}}(s)\) at all 484 stations from top to bottom rows, respectively, obtained when the 3-D anisotropic body in Fig. 1 (shown as dashed line) is assigned with \({\mathbf{R}}_{x}^{T}(45^\circ ){\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}{\mathbf{R}}_{x}(45^\circ )\) and buried at a the surface (0 km), and b 5 km deep, given \({\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}=\left[\begin{array}{ccc}50 & 0& 0\\ 0& 500 & 0\\ 0& 0& 50\end{array}\right]\), and similarly with \({\mathbf{R}}_{x}^{T}(20^\circ ){\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}{\mathbf{R}}_{x}(20^\circ )\) for c and d, and with \({\mathbf{R}}_{x}^{T}(70^\circ ){\widehat{{\varvec{\rho}}}}_{{\varvec{y}}}{\mathbf{R}}_{x}(70^\circ )\) for e and f. In addition, when the 3-D anisotropic body is assigned with \({\mathbf{R}}_{x}^{T}(45^\circ ){\widehat{{\varvec{\rho}}}}_{{\varvec{z}}}{\mathbf{R}}_{x}(45^\circ )\), given \({\widehat{{\varvec{\rho}}}}_{{\varvec{z}}}=\left[\begin{array}{ccc}50 & 0& 0\\ 0& 50 & 0\\ 0& 0& 500\end{array}\right]\), the results are also shown in g and h