Research on Mount Wilson Magnetic Classification Based on Deep Learning

Figure 5

The total number for each type of sunspot groups in months from January 2011 to April 2020. The left dashed vertical line (November 2011) represents that the numbers of various types differ significantly, where the maximum difference is up to 139. The right dashed vertical line (February 2020) represents the numbers of various types that are very close, where the maximum difference is only 1.