Fig. 3From: Statistical evaluation of global geomagnetic field models over Southern Africa during 2015Contour plot of the misfit of IGRF-12 to Southern African declination (D) observations after subtracting crustal anomalies (MF7) and external field variations as determined by the CM4 model. The positions of the observation locations are indicated by dots, while the zero contour line is indicated in white Back to article page