Devi, Pooja; Singh, J; Chandra, Ramesh; Priyal, Muthu; Joshi, Reetika
(Springer, 2021-03)
We have analyzed the Ca-K images obtained at Kodaikanal Observatory as a function of latitude and time for the period of 1913 - 2004 covering Solar Cycles 15 to 23. We have classified the chromospheric activity into plage, ...