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The difference between consecutive daily Sunspot Numbers was analysed. Itsdistribution was approximated on a large time scale with an exponential law. Inorder to verify this approximation a Maximum Entropy distribution was generatedby a modified version of the Simulated Annealing algorithm. The exponentialapproximation holds for the generated distribution too. The exponential law ischaracteristic for time scales covering whole cycles and it is mostly acharacteristic of the Sunspot Number fluctuations and not of its averagevariation.

Distribution of the daily Sunspot Number variation for the last 14 solar cycles