Earth's Magnetic Weak Spot Expands: ESA's Swarm Satellites Reveal Rapid Growth of the South Atlantic Anomaly Scientists Uncover Widening Weak Zone in Earth's Magnetic Field Using 11 years of magnetic filed data from the European Space Agency's Swarm satellites, scientists have found that the South Atlantic Anomaly — a weak spot in Earth's magnetic field — has grown by nearly half the size of continental Europe since 2014. Earth's magnetic field is essential for sustaining life, shielding the planet from harmful cosmic rays and solar particles. Generated by a vast ocean of molten iron swirling about 3,000 kilometers below the surface, this dynamic force behaves like a colossal dynamo, producing electrical currents that create and continuously alter our magnetic field — though the true mechanisms are far more intricate. Swarm, an Earth Explorer mission under ESA's Earth Observation FutureEO programme, consists of three identical satellites designed to measure ...
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