:Issued: 2011 Feb 14 1945 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity #
#--------------------------------------------------------------------#
WEEK 528 from 2011 Feb 07
SOLAR CONDITIONS
---------------
Solar activity was dominated in the beginning of the period by NOAA AR 11153 which strengthened into
a beta-gamma group while rotating out of field over the solar west limb. The region triggered a handful
of C-flares, and on Feb 12 an M1.9 flare.
More firework originated in NOAA AR 11159, from Feb 12 in the C-class and on Feb 13, 17:38 a M6.6
flare.
GEOMAGNETIC CONDITIONS
----------------------
The period was characterized by a moderate solar wind speed between 350 km/s and 500 km/s.
Geomagnetic activity was therefore very low with Kp at most reach values Kp=3 in the beginning of the
period and at most Kp=2 after mid Feb 8.
---------------------------------------------------------------------------
DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2011 Feb 07 026 009 82 005 A5.6 0 0
2011 Feb 08 067 041 90 006 B1.0 0 0
2011 Feb 09 065 031 89 002 B1.4 1 0
2011 Feb 10 037 022 91 005 B2.3 0 0
2011 Feb 11 056 036 91 007 B1.6 0 0
2011 Feb 12 066 038 96 005 B1.2 0 0
2011 Feb 13 /// 050 107 002 B4.4 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
09 0123 0131 0135 N17W72 M1.9 SF 1153
13 1728 1738 1747 S20E04 M6.6 1N 210 II/1,IV/2 10 1158
#--------------------------------------------------------------------#
# 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 #
#--------------------------------------------------------------------#
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity #
#--------------------------------------------------------------------#
WEEK 528 from 2011 Feb 07
SOLAR CONDITIONS
---------------
Solar activity was dominated in the beginning of the period by NOAA AR 11153 which strengthened into
a beta-gamma group while rotating out of field over the solar west limb. The region triggered a handful
of C-flares, and on Feb 12 an M1.9 flare.
More firework originated in NOAA AR 11159, from Feb 12 in the C-class and on Feb 13, 17:38 a M6.6
flare.
GEOMAGNETIC CONDITIONS
----------------------
The period was characterized by a moderate solar wind speed between 350 km/s and 500 km/s.
Geomagnetic activity was therefore very low with Kp at most reach values Kp=3 in the beginning of the
period and at most Kp=2 after mid Feb 8.
---------------------------------------------------------------------------
DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2011 Feb 07 026 009 82 005 A5.6 0 0
2011 Feb 08 067 041 90 006 B1.0 0 0
2011 Feb 09 065 031 89 002 B1.4 1 0
2011 Feb 10 037 022 91 005 B2.3 0 0
2011 Feb 11 056 036 91 007 B1.6 0 0
2011 Feb 12 066 038 96 005 B1.2 0 0
2011 Feb 13 /// 050 107 002 B4.4 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)
---------------------------------------------------------------------------
NOTICEABLE EVENTS
DAY BEGIN MAX END LOC XRAY OP TENCM TYPE Cat NOAA NOTE
09 0123 0131 0135 N17W72 M1.9 SF 1153
13 1728 1738 1747 S20E04 M6.6 1N 210 II/1,IV/2 10 1158
#--------------------------------------------------------------------#
# 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 #
#--------------------------------------------------------------------#
