Fig. 18From: The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic AnomalyChange in secular acceleration per year, averaged over two consecutive 3 year time windows during the Swarm era, from 2014 to 2017 and 2017 to 2020. At the Earth’s surface (top) and at the CMB (bottom) after truncation at degree \(N=15\). Results shown here are taken from the updated CHAOS-7.2 modelBack to article page