SIDC Weekly Bulletin

:Issued: 2010 Feb 09 0959 UTC
:Product: documentation at http://www.sidc.be/products/bul
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# SIDC Weekly bulletin on Solar and Geomagnetic activity             #
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WEEK 475 from 2010 Feb 01  

SOLAR ACTIVITY
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Solar activity was very quiet until Feb. 5th when a new active
region appeared at about N25E35. It was labeled AR 1045 the next
day by NOAA. It produced 3 M-class flares between Feb. 6th and Feb. 7th,
the biggest one peaking at M6.4 on Feb. 7th, 02:34 UT. It was linked to a
halo CME observed by the LASCO coronagraphs. 

GEOMAGNETIC ACTIVITY
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Geomagnetic activity was rather weak during the whole week. There was a brief
period of unsettled conditions (k=4), observed at Dourbes observatory,
on Feb. 2nd, due to the crossing of a fast solar wind stream by the Earth.
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DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2010 Feb 01   029    010   75   012   A3.1   0   0
2010 Feb 02   015    008   75   013   A3.4   0   0
2010 Feb 03   015    009   74   010   A3.2   0   0
2010 Feb 04   011    007   74   003   A2.3   0   0
2010 Feb 05   ///    007   78   003   A2.8   0   0
2010 Feb 06   033    023   88   007   B1.1   2   0
2010 Feb 07   ///    024   90   005   B2.2   1   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)
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NOTICEABLE EVENTS
DAY BEGIN MAX  END  LOC    XRAY OP TENCM TYPE                       Cat NOAA NOTE 
06  1847  1859 1909 N21E17 M2.9 SN       III/1                      40  1045 
06  2131  2137 2142 N21E17 M1.3          III/1                      40  1045 
07  0220  0234 0239 N21E10 M6.4 1N 170   III/2                      40  1045 

 
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