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OK0NAG > SOLAR    01.07.12 13:10l 106 Lines 4094 Bytes #999 (0) @ EU
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:Issued: 2012 Jul 01 1103 UTC
:Product: documentation at http://www.sidc.be/products/ri
#--------------------------------------------------------------------#

# MONTHLY REPORT ON THE INTERNATIONAL SUNSPOT NUMBER                 #

# from the SIDC (RWC-Belgium)                                        #

#--------------------------------------------------------------------#


Provisional International monthly mean Sunspot Number for
June 2012 : 64.5 (sixty-four point five)

Maximum : 116 on 3 // Minimum : 11 on 21, 23

Provisional daily International Sunspot Numbers for June 2012 : 

      1.. 85    6..107   11.. 90   16.. 74   21.. 11   26.. 25
      2..106    7.. 89   12.. 78   17.. 62   22.. 13   27.. 49
      3..116    8.. 75   13.. 79   18.. 40   23.. 11   28.. 61
      4..104    9.. 74   14.. 86   19.. 36   24.. 14   29.. 72
      5..106   10.. 85   15.. 82   20.. 21   25.. 12   30.. 73

70 cooperating stations on July 1, 09 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for December 2011 :  63.4 (+-5%)

            SM    CM                 SM    CM                 SM    CM 
    

2012 Jan    67    65     2012 Jul    62    82     2013 Jan    72    93

     Feb    65    69          Aug    64    84          Feb    74    94

     Mar    58    71          Sep    65    86          Mar    74    93

     Apr    59    74          Oct    67    87          Apr    75    92

     May    60    77          Nov    69    89          May    74    91

     Jun    61    80          Dec    71    92          Jun    73    91


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


 
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# Royal Observatory of Belgium                                       #

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