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SIDC Weekly Bulletin

:Issued: 2010 Mar 16 1315 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 480 from 2010 Mar 08 

SOLAR ACTIVITY
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Solar activity was low during the full week. The visible disc was spotless on March 9 and 10, on March 11 two active regions became visible (NOAA AR 11054 and 11055, Catania 52 and 51 respectively). AR 11055 did not produced any activity, AR 11054 produced a C2.3 flare on March 12 and a C1.3 on March 14. An Earth directed CME erupted from this AR on March 14, it should arrive to the Earth around March 17. Three more limb CMEs were seen between March 11 and 13 but did not arrive to the Earth.

GEOMAGNETIC ACTIVITY
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Geomagnetic conditions were quiet to unsettled the whole week with only one active period (kp=4) on March 10, due to a fast wind stream.

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DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2010 Mar 08   ///    007   76   003   A1.6   0   0
2010 Mar 09   ///    000   78   004   A1.7   0   0
2010 Mar 10   000    000   80   014   A3.2   0   0
2010 Mar 11   032    021   84   012   A4.2   0   0
2010 Mar 12   ///    024   90   011   A6.7   0   0
2010 Mar 13   ///    019   92   005   A6.5   0   0
2010 Mar 14   ///    022   89   007   A6.0   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)
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NOTICEABLE EVENTS
DAY BEGIN MAX  END  LOC    XRAY OP TENCM TYPE                       Cat NOAA NOTE

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# 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                                           #
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