:Issued: 2012 Feb 14 1621 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 580 from 2012 Feb 06
SOLAR ACTIVITY
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Solar activity was moderate, NOAA AR 1410 produced an M1.0 flare at 20:00
UT on February 6. This AR, together with NOAA ARs 1415, 1416 and 1417 produced
several C-class flares throughout the week. There was a filament eruption on
the northern visible disk of the Sun at 20:00 UT on February 10, leading to a
halo CME that could arrive to the Earth 3 to 4 days later.
GEOMAGNETIC ACTIVITY
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Geomagnetic conditions were mostly quiet, with only one 3h active period on
February 7, due to a mild fast speed stream. No ICMEs arrived to the Earth.
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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2012 Feb 06 /// 028 112 010 B2.2 1 0
2012 Feb 07 /// 024 107 020 B2.5 0 0
2012 Feb 08 014 009 97 013 B3.1 0 0
2012 Feb 09 060 022 99 007 B2.7 0 0
2012 Feb 10 /// 034 111 006 B2.7 0 0
2012 Feb 11 /// 035 112 006 B3.0 0 0
2012 Feb 12 /// 032 110 005 B2.4 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)
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NOTICEABLE EVENTS
DAY BEGIN MAX END LOC XRAY OP TENCM TYPE Cat NOAA NOTE
06 1931 2000 2017 N19W60 M1.0 SF 0 1410
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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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