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: 2021 Jan 01 09:32 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 December 2020 : 21.8 (twenty-one point eight) Maximum : 50 on 1 // Minimum : 0 on 19, 20 Provisional daily International Sunspot Numbers for December 2020 : 1.. 50 6.. 22 11.. 11 16.. 13 21.. 11 26.. 32 31.. 32 2.. 46 7.. 20 12.. 11 17.. 12 22.. 11 27.. 31 3.. 43 8.. 13 13.. 11 18.. 7 23.. 23 28.. 29 4.. 39 9.. 13 14.. 13 19.. 0 24.. 27 29.. 30 5.. 36 10.. 12 15.. 19 20.. 0 25.. 29 30.. 29 68 cooperating stations on January 1, 10 UT Predictions of the monthly smoothed Sunspot Number using the last provisional value, calculated for June 2020 : 7.8 (+-5%) SM CM SM CM SM CM 2020 Jul 9 10 2021 Jan 21 34 2021 Jul 34 72 Aug 10 13 Feb 23 39 Aug 36 78 Sep 13 17 Mar 26 45 Sep 39 85 Oct 15 21 Apr 27 50 Oct 41 92 Nov 17 25 May 30 56 Nov 44 98 Dec 19 30 Jun 32 64 Dec 46 105 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 #--------------------------------------------------------------------# # World Data Center SILSO # # Sunspot Index and Long-term Solar Observations # # Royal Observatory of Belgium # # Tel.: ../32/(0)2/373 02 33 Fax : ../32/(0)2/374 98 22 # # Please do not reply directly to this message # # For more information, contact: silso.info@oma.be # # or visit first our Web site at: http://www.sidc.be/silso # # To unsubscribe, visit http://sidc.be/registration/unsub.php # #--------------------------------------------------------------------# ---------------------------------------------------------------------- | Legal notices: | | - Intellectual Property Rights: | | http://www.astro.oma.be/common/internet/en/data-policy-en.pdf | | - Liability Disclaimer: | | http://www.astro.oma.be/common/internet/en/disclaimer-en.pdf | | - Use and processing of your personal information: | | http://www.astro.oma.be/common/internet/en/privacy-policy-en.pdf | ----------------------------------------------------------------------
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