Provisional International monthly mean Sunspot Number for
January 2010 : 13.1 (thirteen point one)


Maximum : 26 on 23, 24 // Minimum : 0 on 6, 7, 19

Provisional daily International Sunspot Numbers for January 2010 : 

      1.. 12    6..  0   11.. 23   16.. 16   21.. 12   26.. 17   31.. 11
      2.. 14    7..  0   12.. 22   17.. 12   22.. 21   27..  9
      3.. 11    8.. 10   13.. 21   18..  9   23.. 26   28..  8
      4.. 10    9.. 10   14.. 18   19..  0   24.. 26   29..  8
      5..  7   10.. 15   15.. 18   20..  9   25.. 23   30..  8

61 cooperating stations on February 1, 15 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for July 2009 :   3.6 (+-5%)

            SM    CM                 SM    CM                 SM    CM     

2009 Aug     4     5     2010 Feb     4    20     2010 Aug     4    43
     Sep     5     6          Mar     4    23          Sep     5    47
     Oct     5     9          Apr     4    27          Oct     5    51
     Nov     5    11          May     4    30          Nov     6    55
     Dec     4    14          Jun     4    34          Dec     6    58
2010 Jan     4    17          Jul     4    39     2011 Jan     7    62

SM : SIDC classical method : based on an interpolation of Waldmeier's
standard curves; the estimated error ranges from 7% (first month) to
35% (last month)
CM : Combined method : the combined method is a regression technique
coupling a dynamo-based estimator with Waldmeier's idea of standard
curves, due to K. Denkmayr.
ref. : K. Denkmayr, P. Cugnon, 1997 : "About Sunspot Number Medium-Term
Predictions", in "Solar-Terrestrial Prediction Workshop V", eds.
G. Heckman et al., Hiraiso Solar Terrestrial Research Center, Japan, 103