Sunspot numbers obtained by different networks in 2013 ====================================================== 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 . . . . . . . . . . . . Feb . . . . . . . . . . . . Mar . . . . . . . . . . . . Apr . . . . . . . . . . . . May . . . . . . . . . . . . Jun . . . . . . . . . . . . Jul . . . . . . . . . . . . Aug . . . . . . . . . . . . Sep . . . . . . . . . . . . Oct . . . . . . . . . . . . Nov . . . . . . . . . . . . Dec . . . . . . . . . . . . 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