Laschamp event

The Laschamp event was a brief period around 41,000 years ago when Earth's magnetic field dramatically weakened and temporarily reversed its north-south orientation. This dip in magnetic strength lasted a few centuries before returning to normal. Such geomagnetic excursions can impact Earth's magnetic shield, which protects us from solar radiation. The event is studied through volcanic rocks and sediments that record the magnetic field’s behavior at that time. Understanding it helps scientists learn about the Earth's magnetic system, its variability, and potential effects on climate and technology during past and future magnetic reversals.