Fig. 2From: Semi-analytical solutions of seismo-electromagnetic signals arising from the motional induction in 3-D multi-layered media: part I—theoretical formulationsSchematic diagram of the LAC GRT coefficients defined for different interfaces. a–c Coefficients defined for the real interfaces \(z = z^{(1)} ,z^{(2)} , \cdot \cdot \cdot ,z^{(N)}\), while (d) accounts for those defined for the two artificial interfaces \(z = z^{(s - )}\) and \(z = z^{(s + )}\)Back to article page