Fastest magnetic-field weakening occurs away from South Atlantic Anomaly’s second minimum, Swarm study finds
Researchers using Swarm satellite and ground-based magnetic measurements found that the fastest decline in total magnetic-field intensity near the South Atlantic Anomaly’s second minimum occurs at 4.55°E, 32.61°S, separate from the minimum at 0.55°W, 40.60°S. Their regional model tracked the minimum from 2014.5 to 2024.5 and recorded non-uniform motion after 2021.0.


