The Sunspot Cycle (1850-1975)


The Sun's magnetism features an irregular cycle of about 11 years (or 22 years). Every cycle..


--The number of sunspots (intensely magnetic) rises and falls.

--The likelihood of solar outbursts, some of which cause large magnetic storms at Earth, rises and falls

--The Sun's global magnetic field reverses in each cycle.

--Many other solar phenomena also follow this cycle.