Fig. 2From: Invariant TE and TM magnetotelluric impedances: application to the BC87 datasetPolar diagrams for: a the invariants \(\rho_{\text{s}} \;{\text{and}}\;\rho_{\text{p}}\); b the invariants \(\rho_{ + } \;{\text{and}}\;\rho_{ - }\); c the element ρxy for a strike of 0° and the invariants \(\rho_{ + } \;{\text{and}}\;\rho_{ - }\); d the element ρxy for a strike of 30° and the invariants \(\rho_{ + } \;{\text{and}}\;\rho_{ - }\)Back to article page