Negative effects of the magnetic poles reversal ??

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Michael Issigonis

The possibility that solar wind can reach the Earth's surface during the reversal period might be lethal to life.

Daniel Pastor-Galán

Major risks (for example, extinction of fauna and flora) are negligible. The Earth magnetic field has flipped constantly with high rates in some cases and there is not a single correlation with large extinctions. However, a reversal now can cause major problems in our satellite network.