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OK0NAG > SOLAR 01.12.17 12:16l 110 Lines 4002 Bytes #999 (0) @ EU
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Subj: Monthly SILSO report: International Sunspot Number and forecasts
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Date: Fri, 1 Dec 2017 11:06:22 GMT
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Subject: Monthly SILSO report: International Sunspot Number and forecasts
:Issued: 2017 Dec 01 09:29 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 2017 : 5.7 (five point seven)
Maximum : 25 on 17 // Minimum : 0 on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 19, 20, 21, 22, 23, 24
Provisional daily International Sunspot Numbers for November 2017 :
1.. 0 6.. 0 11.. 0 16.. 16 21.. 0 26.. 17
2.. 0 7.. 0 12.. 0 17.. 25 22.. 0 27.. 16
3.. 0 8.. 0 13.. 0 18.. 15 23.. 0 28.. 15
4.. 0 9.. 0 14.. 13 19.. 0 24.. 0 29.. 13
5.. 0 10.. 0 15.. 15 20.. 0 25.. 15 30.. 11
74 cooperating stations on December 1, 09 UT
Predictions of the monthly smoothed Sunspot Number using the last
provisional value, calculated for May 2017 : 23.4 (+-5%)
SM CM SM CM SM CM
2017 Jun 24 22 2017 Dec 20 13 2018 Jun 11 7
Jul 24 21 2018 Jan 19 12 Jul 9 7
Aug 23 20 Feb 17 11 Aug 8 7
Sep 22 17 Mar 16 9 Sep 6 6
Oct 21 16 Apr 14 8 Oct 5 6
Nov 21 16 May 13 8 Nov 4 5
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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