Fig. 8From: On the modelling of M2 tidal magnetic signatures: effects of physical approximations and numerical resolutionEffect of physical approximations on the geomagnetic power spectra. Geomagnetic power spectra calculated at the Earth surface by the 2-D approaches elmgFD and x3dg, and the respective effects of galvanically decoupled and insulated mantle. The lateral resolution was kept at \(j_{\mathrm{max}}=480\) and \(0.25^{\circ }\times 0.25^{\circ }\), respectivelyBack to article page