Hemispheric sunspot numbers 1874–2020

Summary

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Authors: Astrid M. Veronig, Shantanu Jain, Tatiana Podladchikova, Werner Pötzi, Frederic Clette

Journal title: Astronomy & Astrophysics

Journal publisher: EDP Sciences

Published year: 2021

DOI identifier: 10.1051/0004-6361/202141195

ISSN: 0004-6361