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: 2024 Mar 01 09:59 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 February 2024 : 124.6 (one hundred and twenty-four point six) Maximum : 167 on 11 // Minimum : 51 on 21 Provisional daily International Sunspot Numbers for February 2024 : 1..118 6..157 11..167 16..145 21.. 51 26..137 2..123 7..150 12..157 17..120 22.. 58 27..120 3..127 8..165 13..138 18..102 23..106 28..131 4..137 9..129 14..143 19.. 73 24..111 29..128 5..157 10..150 15..147 20.. 54 25..115 62 cooperating stations on March 1, 10 UT Predictions of the monthly smoothed Sunspot Number using the last provisional value, calculated for August 2023 : 124.0 (+-5%) SM CM SM CM SM CM 2023 Sep 126 124 2024 Mar 129 123 2024 Sep 124 133 Oct 124 124 Apr 130 122 Oct 122 133 Nov 116 124 May 131 123 Nov 119 133 Dec 120 123 Jun 130 126 Dec 117 132 2024 Jan 123 124 Jul 128 129 2025 Jan 115 131 Feb 126 124 Aug 126 132 Feb 113 129 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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