Fig. 3From: A review of the SCOSTEP’s 5-year scientific program VarSITI—Variability of the Sun and Its Terrestrial ImpactCumulative number N of active regions’ (sunspot groups’) areas A from 1874 to 2016. A is expressed in msh (millionths of solar hemisphere). The left-hand Y-axis gives the total number of active regions with area > A, and the right-hand Y-axis—the occurrence rate N per year (taken from Gopalswamy 2018)Back to article page