I find this quite interesting. Just chillin FAFO time, and boom. If you take the mercator map with magnetic declination and convert it to polar coordinates something familiar appears. Now why would polar projection match so closely to the magnet image in a ferrocell?
Now I ain't saying this is proof of anything other than looks similar, the questions is do we understand magnetism enough to understand why.

Additionally very peculiar how star trails also match up to a ferrocell image. The straight line in the middle is the path of Orion since the beginning of time, to the end of time. Quite interesting, no?

T.me/beyondorwell