Monthly Ri Report

:Issued: 2020 Jul 01 08:21 UTC
:Product: documentation at http://www.sidc.be/products/ri 
#-------------------------------------------------------------#
# MONTHLY TABLE OF THE INTERNATIONAL TOTAL SUNSPOT NUMBER     #
# AND 12-MONTH PREDICTIONS from the World Data Center SILSO   #
#-------------------------------------------------------------#

Provisional International monthly mean Sunspot Number for
June 2020 : 5.8 (five point eight)

Maximum : 17 on 8 // Minimum : 0 on 2, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 28, 29, 30

Provisional daily International Sunspot Numbers for June 2020 : 

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

70 cooperating stations on July 1, 08 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for December 2019 :   1.9 (+-5%)

            SM    CM                 SM    CM                 SM    CM     

2020 Jan     2     3     2020 Jul     5    14     2021 Jan    10    36
     Feb     2     5          Aug     5    17          Feb    11    39
     Mar     3     7          Sep     6    20          Mar    13    43
     Apr     3     8          Oct     7    23          Apr    14    48
     May     4    10          Nov     8    27          May    16    53
     Jun     4    12          Dec     9    31          Jun    19    59

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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