:Issued: 2010 May 18 1227 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 489 from 2010 May 10 SOLAR ACTIVITY ------------ Solar activity was very low during the week, with no significant flaring activity. The 10.7 cm flux decreased to the low 70s by the middle of the week. GEOMAGNETIC ACTIVITY ------------------- Geomagnetic activity was very low during the whole week. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2010 May 10 000 000 74 005 A2.8 0 0 2010 May 11 000 000 74 009 A2.1 0 0 2010 May 12 000 000 71 008 A1.9 0 0 2010 May 13 000 000 69 004 A1.6 0 0 2010 May 14 000 000 70 005 A1.7 0 0 2010 May 15 000 000 70 003 A1.6 0 0 2010 May 16 /// 000 69 004 A1.5 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 # #--------------------------------------------------------------------#