Physics of Earth and Planetary Interiors
Core field changes from eleven years of Swarm satellite observations
Swarm reveals growing weak spot in Earth’s magnetic field
Written by Copernical Team Monday, 13 October 2025 08:50-
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Using 11 years of magnetic field measurements from the European Space Agency’s Swarm satellite constellation, scientists have discovered that the weak region in Earth’s magnetic field over the South Atlantic – known as the South Atlantic Anomaly – has expanded by an area nearly half the size of continental Europe since 2014.