Fig. 6From: A regional geomagnetic field model over Southern Africa derived with harmonic splines from Swarm satellite and ground-based data recorded between 2014 and 2019The SACFM-3 maps showing the change of the field between 2014.5 and 2019.5. The plots of X, Y, Z, F and D are shown from top to bottom. The X, Y, Z and F field elements are in nanotesla and D in degrees. The first column shows the 2014.5 maps, and the second column 2019.5 maps. The differences are shown in the third columnBack to article page