:Issued: 2010 Jul 21 1038 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity #
#--------------------------------------------------------------------#
WEEK 498 from 2010 Jul 12
SOLAR ACTIVITY
-------------
Two active regions were present during the period: NOAA AR 11086 in the Southern hemisphere
and NOAA AR 11087 in the Northern hemisphere. The latter was the biggest of the two, it
developed a beta-gamma magnetic configuration on July 13, and produced C-class flares on
various days during the period.
GEOMAGNETIC ACTIVITY
-------------------
The solar wind speed, as measured by the ACE spacecraft at L1, was at <350 km/s levels, except
for an episode on July 15 and 16 with a wind speed going up to 450 km/s. This disturbance was a
a consequence of a coronal hole on the solar disk and was preceded with a shock in the solar wind
on late July 14 with the Bz component of the interplanetary magnetic field turning southward. As a
consequence NOAA's estimated planetary Kp index peaked briefly to Kp=5 late July 14. The Kp index
was at quiet levels (Kp < 3) otherwise during the period.
---------------------------------------------------------------------------
DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2010 Jul 12 040 024 80 006 B1.0 0 0
2010 Jul 13 044 017 79 003 A9.8 0 0
2010 Jul 14 018 010 78 013 A9.5 0 0
2010 Jul 15 027 011 76 011 A7.6 0 0
2010 Jul 16 015 009 77 005 A8.0 0 0
2010 Jul 17 /// 008 79 002 A9.4 0 0
2010 Jul 18 /// 008 77 002 A9.6 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 #
# #
# For more information, see http://www.sidc.be. Please do not reply #
# directly to this message, but send comments and suggestions to #
# 'sidctech@oma.be'. If you are unable to use that address, use #
# 'rvdlinden@spd.aas.org' instead. #
#--------------------------------------------------------------------#
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity #
#--------------------------------------------------------------------#
WEEK 498 from 2010 Jul 12
SOLAR ACTIVITY
-------------
Two active regions were present during the period: NOAA AR 11086 in the Southern hemisphere
and NOAA AR 11087 in the Northern hemisphere. The latter was the biggest of the two, it
developed a beta-gamma magnetic configuration on July 13, and produced C-class flares on
various days during the period.
GEOMAGNETIC ACTIVITY
-------------------
The solar wind speed, as measured by the ACE spacecraft at L1, was at <350 km/s levels, except
for an episode on July 15 and 16 with a wind speed going up to 450 km/s. This disturbance was a
a consequence of a coronal hole on the solar disk and was preceded with a shock in the solar wind
on late July 14 with the Bz component of the interplanetary magnetic field turning southward. As a
consequence NOAA's estimated planetary Kp index peaked briefly to Kp=5 late July 14. The Kp index
was at quiet levels (Kp < 3) otherwise during the period.
---------------------------------------------------------------------------
DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2010 Jul 12 040 024 80 006 B1.0 0 0
2010 Jul 13 044 017 79 003 A9.8 0 0
2010 Jul 14 018 010 78 013 A9.5 0 0
2010 Jul 15 027 011 76 011 A7.6 0 0
2010 Jul 16 015 009 77 005 A8.0 0 0
2010 Jul 17 /// 008 79 002 A9.4 0 0
2010 Jul 18 /// 008 77 002 A9.6 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 #
# #
# For more information, see http://www.sidc.be. Please do not reply #
# directly to this message, but send comments and suggestions to #
# 'sidctech@oma.be'. If you are unable to use that address, use #
# 'rvdlinden@spd.aas.org' instead. #
#--------------------------------------------------------------------#
