Solar indices (sunspot drawing)

1973 - 1893 - no sunspot drawings for this period

Relative sunspot number:

r = 10g + f 

g – is the number of sunspot groups
f – is the number of individual spots

Butterfly diagram
(1944 - 2025)

1973 - 1893 - no sunspot drawings for this period

N-S asymmetry
(1943 - 2025)

Relative sunspot number for North (red) and South (blue) hemisphere

CV - index
(1994 - 2025)

Transformation of McIntosh classification to
numbers (1-60) according to the probability
of flares (www.cv-helios.net/zmci_tab.html)

R_B - index
(1954 - 1972)