Technology

NASA researchers track slowly splitting 'dent' in Earth's magnetic field

NASA researchers track slowly splitting 'dent' in Earth's magnetic field

A small but evolving dent in Earth's magnetic field can cause big headaches for satellites. Earth's acts like a protective shield around the planet, repelling and trapping charged particles from the Sun. But over South America and the southern Atlantic Ocean, an unusually weak spot in the field—called the South Atlantic Anomaly, or SAA—allows these particles to dip closer to the surface than normal.

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