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: 2022 May 01 08:16 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 April 2022 : 84.0 (eighty-four point zero) Maximum : 135 on 28 // Minimum : 11 on 11 Provisional daily International Sunspot Numbers for April 2022 : 1..128 6.. 74 11.. 11 16.. 64 21..114 26..132 2..121 7.. 58 12.. 14 17.. 85 22..110 27..132 3..118 8.. 52 13.. 33 18..101 23..128 28..135 4.. 81 9.. 38 14.. 41 19.. 96 24..127 29..107 5.. 86 10.. 21 15.. 47 20.. 99 25..118 30.. 51 73 cooperating stations on May 1, 08 UT Predictions of the monthly smoothed Sunspot Number using the last provisional value, calculated for October 2021 : 45.0 (+-5%) SM CM SM CM SM CM 2021 Nov 49 50 2022 May 95 84 2022 Nov 154 111 Dec 55 57 Jun 104 89 Dec 168 113 2022 Jan 59 63 Jul 113 95 2023 Jan 184 115 Feb 67 69 Aug 122 100 Feb 202 117 Mar 76 73 Sep 132 103 Mar 219 119 Apr 85 79 Oct 143 107 Apr 235 120 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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