NASA is closely monitoring the South Atlantic Anomaly (SAA), a vast region between South America and southwest Africa where Earth's magnetic field is unusually weak. Described as a "dent" or "pothole" in the magnetic field, the SAA has baffled scientists for years. While it doesn't affect life on Earth, the anomaly poses a significant risk to spacecraft, particularly those in low-Earth orbit, as they pass through the weakened magnetic zone. NASA Confirms Parker Solar Probe Spacecraft Is ‘Safe’ After Becoming 1st ‘Human-Made Object’ To Fly Close to Sun.

NASA Keeping Eye on Mysterious Weakening in Earth’s Magnetic Field

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