:Issued: 2012 Feb 07 0909 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 579 from 2012 Jan 30
SOLAR ACTIVITY
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Solar activity was very low, with the GOES X-ray background at low B level, and only two small C flares during the whole week. The descending part of the proton event linked to the X1.7 flare of January 27 was observed till January 31, when the greater than 10 MeV proton flux dived beneath the threshold level again.
GEOMAGNETIC ACTIVITY
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Geomagnetic activity has been quiet during the whole week.
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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2012 Jan 30 /// 041 114 010 B2.1 0 0
2012 Jan 31 /// 050 117 003 B2.5 0 0
2012 Feb 01 /// 062 118 005 B2.2 0 0
2012 Feb 02 /// 040 118 004 B2.6 0 0
2012 Feb 03 /// 025 111 006 B2.1 0 0
2012 Feb 04 /// 026 107 011 B1.8 0 0
2012 Feb 05 /// 021 103 011 B1.5 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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