Earth’s magnetic field is not the steadfast guardian that most of us imagine it to be. About 41,000 years ago the field unraveled, then flipped, during the Laschamp event, a geomagnetic reversal that briefly cut its strength to roughly…
Earth’s magnetic field is not the steadfast guardian that most of us imagine it to be. About 41,000 years ago the field unraveled, then flipped, during the Laschamp event, a geomagnetic reversal that briefly cut its strength to roughly…