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: 2017 Nov 01 09:48 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 2017 : 13.2 (thirteen point two)

Maximum : 36 on 1 // Minimum : 0 on 9, 10, 11, 12, 13, 15, 16, 17, 18, 19,
20

Provisional daily International Sunspot Numbers for October 2017 : 

      1.. 36    6.. 23   11..  0   16..  0   21.. 11   26.. 23   31.. 11
      2.. 24    7.. 11   12..  0   17..  0   22.. 11   27.. 23
      3.. 25    8.. 11   13..  0   18..  0   23.. 23   28.. 24
      4.. 27    9..  0   14.. 11   19..  0   24.. 23   29.. 23
      5.. 26   10..  0   15..  0   20..  0   25.. 23   30.. 21

81 cooperating stations on November 1, 10 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for April 2017 :  24.9 (+-5%)

            SM    CM                 SM    CM                 SM    CM     

2017 May    25    23     2017 Nov    22    24     2018 May    15    22
     Jun    25    23          Dec    21    24          Jun    13    21
     Jul    26    24     2018 Jan    20    24          Jul    11    20
     Aug    25    24          Feb    19    25          Aug     9    19
     Sep    24    24          Mar    18    25          Sep     8    18
     Oct    23    24          Apr    16    22          Oct     7    17

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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