Maximal growth rate of the ascending phase of a sunspot cycle for predicting its amplitude Tatiana Podladchikova, Shantanu Jain, Astrid M. Veronig, Olga Sutyrina, Mateja Dumbović, Frédéric Clette and Werner Pötzi A&A, 663 (2022) A88 Published online: 20 July 2022 DOI: 10.1051/0004-6361/202243509