:Issued: 2010 Jan 12 1313 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 471 from 2010 Jan 04 SOLAR ACTIVITY ------------- The beginning of the week was dominated by NOAA active region 11039, producing weak C-class flares. It disappeared behind the western limb on January 6 leaving the visible solar disk spotless, until January 8 when NOAA AR 11040 developed new sunspots. This AR is still growing in size but has produced so far only weak C-class flares. GEOMAGNETIC ACTIVITY ------------------- There were no disturbances that affected the Earth, conditions were quiet for the full week. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2010 Jan 04 016 009 73 002 A3.0 0 0 2010 Jan 05 013 007 77 001 A3.4 0 0 2010 Jan 06 /// 000 77 002 A3.3 0 0 2010 Jan 07 012 000 78 000 A4.1 0 0 2010 Jan 08 024 009 77 001 A3.1 0 0 2010 Jan 09 /// 011 82 000 A6.3 0 0 2010 Jan 10 /// 013 84 003 A7.5 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 # #--------------------------------------------------------------------#