geomagnetic reversal; reversal of Earth's magnetic field
Scientific term for the phenomenon where the Earth's magnetic north and south poles swap positions.
Geomagnetic reversals are thought to occur once every few hundred thousand years.
Records of geomagnetic reversals are preserved in rocks on the ocean floor.
Compound of 地磁気 (geomagnetism) and 逆転 (reversal, inversion).