Earth’s Magnetic Fields

[axj]

The 41,000 year Laschamp marker also corresponds with data in Cycles of Cosmic Catastrophes indicating that the Earth was blasted by a distant supernova at that time period. This is is what's missing from the above article. It stands to reason that the nova caused the Laschamp excursion.

Good point and quite logical that a supernova is the most likely cause of the temporary pole flip within just a few hundred years.

I found this article about the research into the supernova 41,000 years ago:

Research News: Supernova Explosion May Have Caused Mammoth Extinction

www2.lbl.gov

Though it seems to contain massive inconsistencies. If a supernova 250 ly away exploded 41,000 years ago, then its debris would take 7 million years to get here, not 7000 years as the researchers claim:

Firestone adds that it would take 7,000 years for the supernova’s iron-rich grains to travel 250 light years to the Earth.

X-ray analysis determined that the impact depths are consistent with grains traveling at speeds approaching 10,000 kilometers per second.

Grok calculation that it is actually 7 million years at that speed:

To calculate the time it takes to travel 250 light-years at a speed of 10,000 km/s, we need to determine the distance in kilometers and divide it by the speed. [...]

Final Answer: It would take approximately 7,492,716 years to travel 250 light-years at 10,000 km/s, assuming constant speed and no relativistic effects.

Light and some types of radiation traveling at the speed of light would take only 250 years to get here from 250 ly away, but not the much slower particles they are talking about.

It could have been a shock wave of particles from a supernova millions of years ago, though the supernova itself would have been visible only millions of years ago too.

Or maybe the light and radiation traveling at the speed of light could have caused the magnetic pole flip. But their research finds an increase of much slower particles at that time.