Table 1 Impedance tensor characteristics in certain geological situations. In the 1-D case, the impedance of the diagonal elements is zero. In the 2-D case, when the observation axes coincide with the geoelectrical strike, the impedance is zero in the diagonal elements, and the off-diagonal elements are unequal. In the 3-D case, all Z values are nonzero
From: Influence of geomagnetic storms on the quality of magnetotelluric impedance
1-D structure | 2-D structure | 3-D structure |
|---|---|---|
\(\left(\begin{array}{cc}0& {Z}_{xy}\\ {Z}_{yx}& 0\end{array}\right)\) | \(\left(\begin{array}{cc}0& {Z}_{xy}\\ {Z}_{yx}& 0\end{array}\right)\) | \(\left(\begin{array}{cc}{Z}_{xx}& {Z}_{xy}\\ {Z}_{yx}& {Z}_{yy}\end{array}\right)\) |
\({Z}_{xy}=-{Z}_{yx}\) | \({Z}_{xy}\ne {Z}_{yx}\) | All Z values are nonzero |