:Issued: 2010 Apr 21 1611 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity #
#--------------------------------------------------------------------#
WEEK 485 from 2010 Apr 12
SOLAR ACTIVITY
--------------
Solar activity was low during the whole week with no significant flares. The main point to notice is a CME which occurred on April 13. It was linked to a rather spectacular polar crown filament eruption observed by a ground based Halpha coronagraph and different EUV space born telescopes. The CME was partially halo as seen from Earth but in the end, it did not trigger any geomagnetic disturbances.
GEOMAGNETIC ACTIVITY
--------------------
Geomagnetic activity was moderate during the week, with a brief period of major storm conditions observed at planetary (Kp=6) and local (K=7 at Dourbes) levels on April 12. The cause of this was the halo CME of April 8, whose associated interplanetary shock reached the ACE spacecraft on April 11.
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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2010 Apr 12 /// 008 75 019 A2.3 0 0
2010 Apr 13 011 007 75 003 A2.0 0 0
2010 Apr 14 011 000 75 012 A1.9 0 0
2010 Apr 15 000 000 75 009 A2.0 0 0
2010 Apr 16 000 000 75 003 A1.9 0 0
2010 Apr 17 /// 000 74 005 A3.4 0 0
2010 Apr 18 /// 000 75 004 A3.7 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
#--------------------------------------------------------------------#
# 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 485 from 2010 Apr 12
SOLAR ACTIVITY
--------------
Solar activity was low during the whole week with no significant flares. The main point to notice is a CME which occurred on April 13. It was linked to a rather spectacular polar crown filament eruption observed by a ground based Halpha coronagraph and different EUV space born telescopes. The CME was partially halo as seen from Earth but in the end, it did not trigger any geomagnetic disturbances.
GEOMAGNETIC ACTIVITY
--------------------
Geomagnetic activity was moderate during the week, with a brief period of major storm conditions observed at planetary (Kp=6) and local (K=7 at Dourbes) levels on April 12. The cause of this was the halo CME of April 8, whose associated interplanetary shock reached the ACE spacecraft on April 11.
---------------------------------------------------------------------------
DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2010 Apr 12 /// 008 75 019 A2.3 0 0
2010 Apr 13 011 007 75 003 A2.0 0 0
2010 Apr 14 011 000 75 012 A1.9 0 0
2010 Apr 15 000 000 75 009 A2.0 0 0
2010 Apr 16 000 000 75 003 A1.9 0 0
2010 Apr 17 /// 000 74 005 A3.4 0 0
2010 Apr 18 /// 000 75 004 A3.7 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)
---------------------------------------------------------------------------
NOTICEABLE EVENTS
DAY BEGIN MAX END LOC XRAY OP TENCM TYPE Cat NOAA NOTE
#--------------------------------------------------------------------#
# 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 #
#--------------------------------------------------------------------#
