Fig. 2From: Statistical evaluation of global geomagnetic field models over Southern Africa during 2015RMS differences between D, H, Z and F geomagnetic field components and IGRF-12, CHAOS-6, POMME-10 global field models over Southern Africa regarding main field (a) and secular variation (b). Results for the regional field model for Southern Africa, SAREG, are also shown for comparative purposes. Both the main field declination D and the horizontal component H were scaled up by a factor of 2 in order to match the scale of the bar chart, while the secular variation for D was scaled by 4Back to article page