Sunspot numbers obtained by different networks in 2000 ====================================================== SIDC SONNE SONNE AAVSO AKS BAA GFOES GSRSI OAA RWG TOS VVS prov. prov. def. prov. (D) (GB) (F) (I) (J) (CH) (PL) (B) Jan 90.2 90.7 88.2 111.3 92.8 97.4 107.7 117.6 106.3 100.0 99.5 113.2 Feb 112.3 112.9 111.1 133.2 124.0 121.0 120.7 147.3 135.7 125.4 126.9 141.5 Mar 138.2 150.9 148.1 176.7 148.9 161.8 158.3 206.8 169.6 171.5 166.0 179.8 Apr 125.3 134.1 131.8 159.8 135.5 149.6 142.2 166.5 153.9 147.2 151.8 159.6 May 120.8 118.5 114.1 140.4 116. 123.6 117.5 175.4 127.5 122.1 142.5 145.1 Jun 124.9 134.0 131.3 163.6 136.2 139.6 133.0 172.6 147.9 150.1 155.2 169.1 Jul 169.1 170.6 168.4 210.6 167.7 180.9 173.8 206.4 189.7 200.8 195.4 222.2 Aug 130.5 120.7 124.1 148.5 132. 129.0 135.8 165.7 146.0 147.2 138.0 150.7 Sep 109.9 109.6 109.2 140.3 111.6 114.4 109.6 139.6 126.9 128.6 126.2 138.2 Oct 100.1 92.7 96.2 123.8 100.2 105.7 103.7 134.5 117.0 113.2 116.8 117.0 Nov 106.5 106.8 107.7 138.1 111.2 122.4 114.8 134.8 126.0 121.2 133.0 132.5 Dec 104.5 97.4 98.5 131.5 95.9 108.5 107.8 122.7 122.4 114.9 124.9 121.5 SIDC: Solar Influences Data Analysis Center, Brussels (International sunspot numbers) SONNE prov.: SONNE network, provisional sunspot numbers SONNE def. : SONNE network, definitive sunspot numbers AAVSO: American Association of Variable Star Observers - Solar Division AKS: Arbeitskreis Sonne des Kulturbundes e.V., Germany BAA: The British Astronomical Association - Solar Section, UK GFOES: G.F.O.E.S. Commission "Nombre de Wolf", France GSRSI: GruppoSole Ricerce Solari Italia, Italy OAA: The Oriental Astronomical Association - Solar Division, Japan RWG: Rudolf Wolf Gesellschaft - Solar Obs. Group of Swiss Astron. Society TOS: Towarzystwo Obserwatorow Slonca - Solar Observers Society, Poland VVS: Vereniging voor Sterrenkunde, Werkgroep Zon, Belgium