Hang on to yer hats gang..
NASA Is Tracking a Huge, Growing Anomaly in Earth's Magnetic Field
A study published in July 2020 suggested the phenomenon is not a freak event of recent times, but a recurrent magnetic event that may have affected Earth since as far back as 11 million years ago.
If so, that could signal that the South Atlantic Anomaly is not a trigger or precursor to the entire planet's magnetic field flipping, which is something that actually happens, if not for hundreds of thousands of years at a time.