Fig. 16
From: The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly
Field intensity at Earth’s surface, highlighting the South Atlantic Anomaly. Top and middle rows show field intensity in nT in 2014 and 2020, based on the CHAOS-7 internal field up to degree 20. White contour lines are in steps of 500 nT from 22,500 to 27,000 nT. Bottom row shows the difference in intensity between 2020 and 2014 in nT, blue colours show a decrease in intensity, red colours an increase, contour lines here again show the field intensity in 2020 in steps of 500 nT from 22,500 to 27,000 nT as black contours