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NASA geophysicists explain that the anomaly is also tied to a local reversal of magnetic polarity in the region, which further weakens the overall dipole field. According to Weijia Kuang of NASA ...
"The observed SAA can be also interpreted as a consequence of weakening dominance of the dipole field in the region," said NASA Goddard geophysicist and mathematician Weijia Kuang in 2020.