Linked from
The 22 pages that link to Solar cycle, each with the reason it gives.
Coronal mass ejectionRelated: Ejection rates and source regions vary with the Sun’s activity cycle.
Solar magnetic fieldRelated: The magnetic cycle drives the rise and fall of sunspot activity.
SunspotRelated: Sunspot abundance rises and falls as part of this recurring activity cycle.
Solar prominenceRelated: Prominence activity changes with the Sun’s evolving magnetic cycle.
Carrington EventRelated: The 1859 storm occurred during a period of substantial solar activity.
Solar physicsRelated: Its recurring pattern is a central test of theories of the solar dynamo.
Solar stormRelated: Storm likelihood generally rises and falls with the Sun's activity cycle.
Hale's lawRelated: Hale’s polarity orientations switch between successive cycles.
Solar phenomenaRelated: Activity levels rise and fall over the cycle, shaping event frequency.