Fig. 2.
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Overview of atlas activity. Each disc on the top row represents the most active, with the highest spot number, day used for said atlas. The bottom row is the same except that it shows the lowest activity level for any given atlas. Data from the Solar Dynamics Observatory Atmospheric Imaging Assembly (SDO/AIA, Lemen et al. 2012) 1700 Å filter. Left: HARPS-N quiet Sun atlas, Reiners IAG flux atlas, PEPSI 2018 atlas, and Molaro LFC atlas. We note that the LFC atlas only has one data point, thus, it shows the same data twice.
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