Fig. 14From: The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic AnomalyMaps of the radial magnetic field (MF, top row), its first time derivative (SV, middle row) and second time derivative (SA, bottom row) at the core–mantle boundary in 2019.0, Truncation degrees are 13, 17 and 15, respectively, for the MF, SV and SABack to article page