mercoledì 15 febbraio 2012

SIDC Weekly Bulletin

: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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