Monthly Ri Report

:Issued: 2023 Dec 01 09:47 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
November 2023 : 105.4 (one hundred and five point four)

Maximum : 181 on 23 // Minimum : 25 on 17

Provisional daily International Sunspot Numbers for November 2023 : 

      1..115    6.. 77   11.. 79   16.. 30   21..152   26..165
      2..120    7.. 77   12.. 81   17.. 25   22..155   27..154
      3..122    8..112   13.. 72   18.. 31   23..181   28..148
      4.. 91    9.. 98   14.. 57   19.. 67   24..162   29..158
      5.. 91   10.. 91   15.. 34   20.. 95   25..174   30..148

64 cooperating stations on December 1, 10 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for May 2023 : 123.9 (+-5%)

            SM    CM                 SM    CM                 SM    CM     

2023 Jun   126   124     2023 Dec   152   121     2024 Jun   166   125
     Jul   127   123     2024 Jan   157   122          Jul   163   129
     Aug   132   122          Feb   162   122          Aug   161   131
     Sep   136   122          Mar   165   122          Sep   158   133
     Oct   140   122          Apr   167   121          Oct   155   133
     Nov   146   121          May   167   122          Nov   152   133

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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