Monthly Ri Report

Provisional daily, monthly and monthly smoothed sunspot numbers.
Source SIDC (RWC-Belgium)
Frequency Monthly
Format Plain text
Mail header Monthly Ri Report
SIDC code ri

Latest issue

:Issued: 2018 Nov 01 10:05 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
October 2018 : 4.9 (four point nine)

Maximum : 26 on 13 // Minimum : 0 on 5, 6, 7, 8, 9, 10, 16, 18, 19, 20, 22,
23, 24, 25, 26, 27, 28, 29, 30, 31

Provisional daily International Sunspot Numbers for October 2018 : 

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

74 cooperating stations on November 1, 10 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for April 2018 :   7.9 (+-5%)

            SM    CM                 SM    CM                 SM    CM     

2018 May     8     4     2018 Nov     3     1     2019 May     1     9
     Jun     8     1          Dec     3     2          Jun     0    11
     Jul     8     1     2019 Jan     2     3          Jul     0    13
     Aug     7     0          Feb     2     4          Aug     0    15
     Sep     5     1          Mar     2     5          Sep     0    18
     Oct     4     1          Apr     1     7          Oct     0    21

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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