313 citations · 746 across the 13 of their papers we have counts for
3 papers · 1 filter
The new Sunspot Number: assembling all corrections
Frédéric, Clette, Laure Lefèvre
The Sunspot Number, created by R.Wolf in 1849, provides a direct long-term record of solar activity from 1700 to the present. In spite of its central role in multiple studies of th…
The revised Brussels-Locarno Sunspot Number (1981-2015)
Frédéric Clette, Laure Lefèvre, Marco Cagnotti +2
In 1981, the production of the international Sunspot Number moved from the Zürich Observatory to the Royal Observatory of Belgium, marking a very important transition in the histor…
Equivalence relations between the Cortie and Zurich sunspot group morphological classifications
V. M. S. Carrasco, L. Lefevre, J. M. Vaquero +1
Catalogues of sunspots have been available with useful information about sunspots or sunspot groups for approximately the last 150 years. However, the task of merging these catalog…