:Issued: 2010 Jun 22 1249 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 494 from 2010 Jun 14 SOLAR ACTIVITY ------------- The period started right after intensive flaring from NOAA AR1081 (see previous bulletin). However, on the first day of the period (Monday June 14), NOAA AR 1081 was already on the solar west limb and could only produce one more C1.5 flare, peaking at 00:51. This was right away also the biggest flare of the whole period. Towards the end of the period, NOAA AR 1082 increased in size and complexity, but only produced a B5-flare on Feb 17 (peaking at 10:33). GEOMAGNETIC ACTIVITY ------------------- Geomagnetic activity was characterized during the period by the influence of high speed solar wind stream first detected by the ACE spacecraft on June 15 around 05:00UT. The solar wind speed was at an elevated level of about 500-600 km/s from June 16 till June 19. Geomagnetic activity increased to Kp=3 levels on June 15 PM and Kp=4 levels on June 16. --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2010 Jun 14 /// 009 73 005 A7.7 0 0 2010 Jun 15 000 000 70 010 A5.4 0 0 2010 Jun 16 000 000 72 024 A4.5 0 0 2010 Jun 17 014 008 70 012 A4.2 0 0 2010 Jun 18 014 008 71 008 A4.1 0 0 2010 Jun 19 /// 018 69 004 A4.2 0 0 2010 Jun 20 /// 011 70 005 A4.4 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 # #--------------------------------------------------------------------#