:Issued: 2011 Jun 14 1338 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity #
#--------------------------------------------------------------------#
WEEK 545 from 2011 Jun 06
SOLAR ACTIVITY
-------------
The week was dominated by the activity exerted by duo AR11226 and AR11227 in the southern hemisphere. On June 07, a prominence between the two active regions became unstable. It erupted in a spectacular way: plasma was ejected upwards and fountain wise part of it felt back in the solar corona initiating intensity waves. The plasma cloud was not directed towards Earth. At the same time an M2.5 flare occurred peaking at 06:30UT. The proton fluxes went up passing almost immediately the storm threshold. The proton event lasted until midday June 08.
GEOMAGNETIC ACTIVITY
-------------------
The geomagnetic disturbance on June 04-05 was possibly caused by the plasma eruptions on June 01 and 02. A shock in the solar wind passed at ACE around 10:00UT on June 07, 2011. The smooth rotation in the y-component of the magnetic field is possibly linked with an ICME. This magnetic structure is possibly linked with the plasma ejections in the morning of June 05. The estimated Kp index became 5 during the first 3 hours on June 08. >From the second part of June 09 until June 11, the overall magnetic field strength carried in the solar wind fluctuated between 5 and 10 nT. The solar wind travelled at that moment at a speed of 450-400 km/s. Unsettled to a few active periods were measured. It is not crystal clear that this is linked with the June 07 ejection.
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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2011 Jun 06 /// 046 100 007 B2.0 0 0
2011 Jun 07 059 039 96 011 B1.6 1 0
2011 Jun 08 074 032 90 014 B1.3 0 0
2011 Jun 09 057 028 88 011 B1.2 0 0
2011 Jun 10 048 022 87 012 B1.2 0 0
2011 Jun 11 /// 015 85 014 B1.2 0 0
2011 Jun 12 /// 011 85 009 B1.7 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
07 0616 0641 0659 S21W54 M2.5 2N 710 II/2,IV/2 98 1226 spectacular filament eruption
#--------------------------------------------------------------------#
# 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 545 from 2011 Jun 06
SOLAR ACTIVITY
-------------
The week was dominated by the activity exerted by duo AR11226 and AR11227 in the southern hemisphere. On June 07, a prominence between the two active regions became unstable. It erupted in a spectacular way: plasma was ejected upwards and fountain wise part of it felt back in the solar corona initiating intensity waves. The plasma cloud was not directed towards Earth. At the same time an M2.5 flare occurred peaking at 06:30UT. The proton fluxes went up passing almost immediately the storm threshold. The proton event lasted until midday June 08.
GEOMAGNETIC ACTIVITY
-------------------
The geomagnetic disturbance on June 04-05 was possibly caused by the plasma eruptions on June 01 and 02. A shock in the solar wind passed at ACE around 10:00UT on June 07, 2011. The smooth rotation in the y-component of the magnetic field is possibly linked with an ICME. This magnetic structure is possibly linked with the plasma ejections in the morning of June 05. The estimated Kp index became 5 during the first 3 hours on June 08. >From the second part of June 09 until June 11, the overall magnetic field strength carried in the solar wind fluctuated between 5 and 10 nT. The solar wind travelled at that moment at a speed of 450-400 km/s. Unsettled to a few active periods were measured. It is not crystal clear that this is linked with the June 07 ejection.
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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2011 Jun 06 /// 046 100 007 B2.0 0 0
2011 Jun 07 059 039 96 011 B1.6 1 0
2011 Jun 08 074 032 90 014 B1.3 0 0
2011 Jun 09 057 028 88 011 B1.2 0 0
2011 Jun 10 048 022 87 012 B1.2 0 0
2011 Jun 11 /// 015 85 014 B1.2 0 0
2011 Jun 12 /// 011 85 009 B1.7 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
07 0616 0641 0659 S21W54 M2.5 2N 710 II/2,IV/2 98 1226 spectacular filament eruption
#--------------------------------------------------------------------#
# 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 #
#--------------------------------------------------------------------#
