Robuta

https://www.sciencealert.com/earth-s-magnetic-poles-could-flip-more-frequently-than-we-previously-thought
Oct 3, 2019 - Half a billion years ago, when trilobites ruled and dry land was a barren wasteland, Earth was having a terrible time making a decision.
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https://www.scirp.org/reference/ReferencesPapers?ReferenceID=2310066
For Example Magnetic Reversal of the Poles of the Sun, NASA Report.
for examplemagnetic reversalthe polessun