Comparison between the solar magnetic APs. In the left panels, S_ph from VIRGO g+r is shown by the blue circles, while SA and F_10.7 are shown by the solid green and orange lines, respectively. The right-hand side shows how F_10.7, SA, and S_ph relate to each other: the blue circles correspond to solar cycles 23 and 24, the black dots correspond to the ∼​70 years of contemporaneous observations of SA and F_10.7. Each panel shows the corresponding SCC value, where “70yr” stands for 70 years of common SA and F_10.7 observations.