Across four solar cycles, polar field reversals finished in the north first, 0.6 to 1.1 years before the south, and the polar field precursor suggests cycle 25 will peak near 116 in smoothed sunspot numbers.
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On Polar Magnetic Field Reversal in Solar Cycles 21, 22, 23, and 24
Across four solar cycles, polar field reversals finished in the north first, 0.6 to 1.1 years before the south, and the polar field precursor suggests cycle 25 will peak near 116 in smoothed sunspot numbers.