A study of the magnetic record from the 11th through 14th centuries CE in an iron smelting site in Cambodia finds a sharp directional change of the Earth's magnetic field between 1200 and 1300 CE and a dip in magnetic field intensity between 1100 and 1300 CE; the results suggest the possible existence of a magnetic phenomenon called flux expulsion at low latitudes, which may explain geomagnetic anomalies near the equator and could be one of the trigger mechanisms of geomagnetic reversal.
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Article #20-22490:
"Archaeomagnetic results from Cambodia in Southeast Asia: Evidence for possible low-latitude flux expulsion," by Shuhui Cai et al.
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