@marksb
The Sun's magnetic field reverses polarity every 11 years, typically around the maximum phase of each solar cycle. This process is known as polar field reversal. The reversal is characterized by a change in the polarity of the solar polar fields in both hemispheres, which can be identified by a clear change in the sign of the polar fields or a zero crossing of the polar fields[1][2][3].
Sources
https://www.aanda.org/articles/aa/full_html/2018/10/aa32981-18/aa32981-18.html
https://www.nasa.gov/science-research/heliophysics/the-suns-magnetic-field-is-about-to-flip/
https://timesofindia.indiatimes.com/home/science/the-suns-magnetic-field-flip-what-to-expect-and-when-earth-aurora-weather-change/articleshow/111016488.cms
https://nso.edu/blog/polar-magnetic-field-reversal/
https://www.scientificamerican.com/article/the-suns-magnetic-poles-are-vanishing/
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