Evolved Solar Flux
The 30-days SF SSN plot shows us, more than ever, changes occurring on the Sun: From Feb 7, SF and SSN plots started to show different behaviour. Solar Flux 10.7 solar flux monitoring line. a) Kitt Peak Solar Flux Red data points represent sporadic observations since 1610. Activity cycles 21, 22 and 23 seen in sunspot number index, TSI, 10.7cm radio flux, Solar Flux - .