Daily total sunspot number since 1818 (taches solaires) - SILSO data, Royal Observatory of Belgium, Brussels
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Daily total sunspot number since 1818 (taches solaires) - SILSO data, Royal Observatory of Belgium, Brussels
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See also the monthly sunspot number analyze /
Voir aussi la courbe du décompte mensuel :
Monthly total sunspot number
- SILSO data, Royal Observatory of Belgium, Brussels