Monthly Ri Report

:Issued: 2024 Jul 01 09:23 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 2024 : 164.2 (one hundred and sixty-four point two)

Maximum : 218 on 29 // Minimum : 107 on 11

Provisional daily International Sunspot Numbers for June 2024 : 

      1..181    6..159   11..107   16..152   21..148   26..180
      2..207    7..163   12..124   17..141   22..160   27..174
      3..212    8..173   13..151   18..135   23..164   28..177
      4..211    9..153   14..158   19..150   24..153   29..218
      5..182   10..123   15..151   20..165   25..146   30..208

63 cooperating stations on July 1, 09 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for December 2023 : 129.4 (+-5%)

            SM    CM                 SM    CM                 SM    CM     

2024 Jan   126   130     2024 Jul   132   133     2025 Jan   118   131
     Feb   127   130          Aug   130   135          Feb   116   129
     Mar   133   128          Sep   128   136          Mar   114   130
     Apr   135   127          Oct   126   135          Apr   112   130
     May   135   128          Nov   123   134          May   110   128
     Jun   134   130          Dec   121   133          Jun   108   126

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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