:Issued: 2010 Nov 02 1418 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 513 from 2010 Oct 25 SOLAR ACTIVITY -------------- Solar activity was low during the whole week. NOAA AR 1117 was the most active, producing several C-class flares during the week, a C5.7 on Oct 31 was the strongest one. NOAA AR 1119 produced only a C 1.0 flare on Oct 26. CMEs erupted from the Sun every day of the week, but only one was Earth directed, occurring on Oct 26. GEOMAGNETIC ACTIVITY -------------------- Geomagnetic activity was at quiet to unsettled levels the full week. The CME of Oct 26 arrived on Oct 30 but did not produce any geomagnetic disturbance. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2010 Oct 25 079 042 86 010 A9.6 0 0 2010 Oct 26 092 043 86 012 B1.1 0 0 2010 Oct 27 057 027 88 007 B1.0 0 0 2010 Oct 28 038 018 86 004 A9.4 0 0 2010 Oct 29 061 023 86 004 A8.1 0 0 2010 Oct 30 048 020 85 002 B1.1 0 0 2010 Oct 31 /// 020 81 006 A9.4 0 0 # RC : Sunspot index (Wolf Number) from Catania Observatory (Italy) # EISN : Estimated International Sunspot Number # 10cm : 10.7 cm radioflux (DRAO, Canada) # Ak : Ak Index Wingst (Germany) # BKG : Background GOES X-ray level (NOAA, USA) # M,X : Number of X-ray flares in M and X class, see below (NOAA, USA) --------------------------------------------------------------------------- NOTICEABLE EVENTS DAY BEGIN MAX END LOC XRAY OP TENCM TYPE Cat NOAA NOTE #--------------------------------------------------------------------# # Solar Influences Data analysis Center - RWC Belgium # # Royal Observatory of Belgium # # Fax : 32 (0) 2 373 0 224 # # Tel.: 32 (0) 2 373 0 491 # # # # For more information, see http://www.sidc.be. Please do not reply # # directly to this message, but send comments and suggestions to # # 'sidctech@oma.be'. If you are unable to use that address, use # # 'rvdlinden@spd.aas.org' instead. # # To unsubscribe, visit http://sidc.be/registration/unsub.php # #--------------------------------------------------------------------#