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: 2019 Sep 01 08:35 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
August 2019 : 0.7 (zero point seven)

Maximum : 12 on 5 // Minimum : 0 on 1, 2, 3, 4, 6, 8, 9, 10, 11, 12, 13,
14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31

Provisional daily International Sunspot Numbers for August 2019 : 

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

68 cooperating stations on September 1, 09 UT

Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for February 2019 :   5.0 (+-5%)

            SM    CM                 SM    CM                 SM    CM     

2019 Mar     5     5     2019 Sep     3    12     2020 Mar     3    31
     Apr     5     3          Oct     3    15          Apr     3    36
     May     5     5          Nov     3    17          May     4    40
     Jun     5     7          Dec     3    20          Jun     4    44
     Jul     4     9     2020 Jan     3    24          Jul     4    49
     Aug     4    11          Feb     3    27          Aug     5    54

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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