SIDC Weekly Bulletin
Review of past solar and geomagnetic activity.| Source | SIDC (RWC-Belgium) |
| Frequency | Weekly |
| Format | Plain text |
| Mail header | SIDC Weekly Bulletin |
| SIDC code | bul |
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:Issued: 2012 May 21 1622 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 594 from 2012 May 14 SOLAR ACTIVITY -------------- One M-class flare was detected during the week, an M5.1 event on May 17 peaking at 01:47 UT from NOAA AR 1476. This flare was related to a proton event and a CME with an Earth directed component and type II and III radio bursts. The rest of the week presented low solar activity with minor C-class flares. A CME that erupted on May 18 from AR 1482 may arrive to the Earth on May 21-22 (estimated speed of 500 km/s). GEOMAGNETIC ACTIVITY --------------------- On May 15 an ICME arrived to the Earth, most probably coming from an eruption on May 12, but did not cause any geomagnetic consequences. On May 20 at 01:44 UT a shock coming from the CME on May 17 was detected at ACE, without geomagnetic consequences (it produced active conditions at planetary levels Kp=4, but only k=2 at Dourbes) --------------------------------------------------------------------------- --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2012 May 14 /// 080 130 004 B4.3 0 0 2012 May 15 /// 085 129 004 B4.9 0 0 2012 May 16 175 093 131 012 B4.5 0 0 2012 May 17 /// 077 136 005 B6.5 1 0 2012 May 18 093 075 132 011 B4.5 0 0 2012 May 19 140 074 131 006 B3.5 0 0 2012 May 20 /// 083 131 014 B3.4 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 17 0125 0147 0214 N11W76 M5.1 1F 540 II/3,IV/2,III/3 1476 #--------------------------------------------------------------------# # 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 # #--------------------------------------------------------------------#
Details
This report is sent once a week, typically on a monday.The weekly bulletin gives an overview of solar and geomagnetic activity of the past week and includes a noticeable solar events list.
Check the ISES code book for information on ISES codes.