Daily International Sunspot Number:
last 13 years and 12-month ahead predictions

The daily (yellow), monthly (blue) and 13-month smoothed (red) sunspot numbers over the 13 past years, with predictions for the next 12 months by two methods:

SC (red dash-dotted) : classical Standard-Curves prediction method, based on a least-square interpolation of Waldmeier's set of standard solar cycle profiles;

CM (red dashes) : Combined Method (K.Denkmayr and P. Cugnon), based on a regression technique combining a geomagnetic precursor (aa index) with a least-square fit to the actual profiles of the past 24 solar cycles.