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Swarm reveals growing weakspot in Earth's magnetic field - Science Tech Updates

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. Earth’s magnetic field is vital to life […] The post Swarm reveals growing weakspot in Earth’s magnetic field appeared first o…
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The South Atlantic Anomaly (SAA) — a weakened region of Earth's magnetic field — continues to grow, revealing the complex and dynamic behavior of the planet's interior geophysics.

The South Atlantic Anomaly has been steadily expanding and weakening since 2014 • The magnetic field over Canada is weakening, while it is significantly strengthening over Siberia • The changes threaten satellites in orbit and modern navigation systems

At the level of the South Atlantic, the Earth's magnetic field is a bit special. Lower than elsewhere on the planet, its condition has deteriorated for at least ten years, reveal new satellite observations.

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Futura broke the news in on Tuesday, October 14, 2025.
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