:Issued: 2011 Nov 08 1350 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity #
#--------------------------------------------------------------------#
WEEK 566 from 2011 Oct 31
SOLAR ACTIVITY
--------------
Several active regions were present on the solar disk during this week. With the appearance on the eastern limb of NOAA AR 11339, solar flaring activity increased from active to eruptive late on November 2. Several M-flares and one X1.9 flare were produced by this beta-gamma-delta region during the following days.
The M-flare late on Nov 2 was associated with an eastward CME. On Nov 3 a fast halo CME was observed in LASCO. STEREO data show that it was a predominantly backsided event, although the shock surrounding the CME makes it to appear as halo in all the available coronagraphs. A third CME came right after the halo CME, on Nov 4, first visible in LASCO at around 01h25 UT and was again directed eastward.
At the time of writing this bulletin AR NOAA 11339 has become quieter, but it has still beta-gamma-delta configuration and is thus capable of producing strong activity. Due to its position close to the central meridian, any CME originating in this AR may produce strong geomagnetic consequences as well as SEP fluxes.
GEOMAGNETIC CONDITIONS
------------------------
Geomagnetic conditions were predominantly quiet during this week. A weak shock was recorded in the solar wind by ACE on Nov.1 at 7:30UT. Although the Bz component jumped to -15nT, the solar wind speed rose only to 420km/s. This slight disturbance thus only produced temporary unsettled to active geomagnetic conditions. The remainder of the week was geomagnetically quiet.
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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2011 Oct 31 /// 062 138 016 B8.8 2 0
2011 Nov 01 /// 079 139 018 B9.2 0 0
2011 Nov 02 /// 086 154 009 C1.0 1 0
2011 Nov 03 /// 095 160 004 B8.9 2 1
2011 Nov 04 129 066 164 004 B8.8 1 0
2011 Nov 05 /// 076 172 003 B8.1 3 0
2011 Nov 06 /// 102 177 002 B8.4 2 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
31 1455 1508 1527 N20E88 M1.1
31 1721 1808 1850 N20E88 M1.4
02 2152 2201 2219 N20E73 M4.3 SN 1339
03 1058 1111 1120 N22E69 M2.5 SF 54 1339
03 2016 2027 2032 N22E63 X1.9 2B 620 III/1 1339
03 2328 2336 2344 E90N25 M2.1 1N 1339 backsided, east limb, post-eruptive loops visible
04 2031 2040 2046 N18E46 M1.0 SF 1339
05 0308 0335 0358 N20E45 M3.7 1F III/1 1339
05 1110 1121 1142 N21E42 M1.1 SN III/2 1339
05 2031 2038 2054 N21E34 M1.8 1N 1339
06 0046 0103 0124 N21E35 M1.2 SF 1339
06 0614 0635 0641 N21E31 M1.4 SN III/2,II/1 1339
#--------------------------------------------------------------------#
# 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 566 from 2011 Oct 31
SOLAR ACTIVITY
--------------
Several active regions were present on the solar disk during this week. With the appearance on the eastern limb of NOAA AR 11339, solar flaring activity increased from active to eruptive late on November 2. Several M-flares and one X1.9 flare were produced by this beta-gamma-delta region during the following days.
The M-flare late on Nov 2 was associated with an eastward CME. On Nov 3 a fast halo CME was observed in LASCO. STEREO data show that it was a predominantly backsided event, although the shock surrounding the CME makes it to appear as halo in all the available coronagraphs. A third CME came right after the halo CME, on Nov 4, first visible in LASCO at around 01h25 UT and was again directed eastward.
At the time of writing this bulletin AR NOAA 11339 has become quieter, but it has still beta-gamma-delta configuration and is thus capable of producing strong activity. Due to its position close to the central meridian, any CME originating in this AR may produce strong geomagnetic consequences as well as SEP fluxes.
GEOMAGNETIC CONDITIONS
------------------------
Geomagnetic conditions were predominantly quiet during this week. A weak shock was recorded in the solar wind by ACE on Nov.1 at 7:30UT. Although the Bz component jumped to -15nT, the solar wind speed rose only to 420km/s. This slight disturbance thus only produced temporary unsettled to active geomagnetic conditions. The remainder of the week was geomagnetically quiet.
---------------------------------------------------------------------------
DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2011 Oct 31 /// 062 138 016 B8.8 2 0
2011 Nov 01 /// 079 139 018 B9.2 0 0
2011 Nov 02 /// 086 154 009 C1.0 1 0
2011 Nov 03 /// 095 160 004 B8.9 2 1
2011 Nov 04 129 066 164 004 B8.8 1 0
2011 Nov 05 /// 076 172 003 B8.1 3 0
2011 Nov 06 /// 102 177 002 B8.4 2 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
31 1455 1508 1527 N20E88 M1.1
31 1721 1808 1850 N20E88 M1.4
02 2152 2201 2219 N20E73 M4.3 SN 1339
03 1058 1111 1120 N22E69 M2.5 SF 54 1339
03 2016 2027 2032 N22E63 X1.9 2B 620 III/1 1339
03 2328 2336 2344 E90N25 M2.1 1N 1339 backsided, east limb, post-eruptive loops visible
04 2031 2040 2046 N18E46 M1.0 SF 1339
05 0308 0335 0358 N20E45 M3.7 1F III/1 1339
05 1110 1121 1142 N21E42 M1.1 SN III/2 1339
05 2031 2038 2054 N21E34 M1.8 1N 1339
06 0046 0103 0124 N21E35 M1.2 SF 1339
06 0614 0635 0641 N21E31 M1.4 SN III/2,II/1 1339
#--------------------------------------------------------------------#
# 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 #
#--------------------------------------------------------------------#
