Criteria for determining the start of a new cycle

American Association of Variable Star Observers (AAVSO)
Thu, 12/17/2020 - 04:05


I have been observing the sun for several years now.

I have just completed a training course on the classification of variable stars and light curves in French at AAVSO.

I am asking myself a very simple question without a precise answer, here it is:

  • Regarding solar cycles, is there a convention established by the scientific community to determine the start of a new cycle? If yes, what are the criteria used?

Thank you in advance and have a good day,

Max Surlaroute