lunedì 24 Gennaio 2022
Home > Propagazione > SIDC Weekly Bulletin

SIDC Weekly Bulletin

:Issued: 2010 Mar 04 1356 UTC
:Product: documentation at http://www.sidc.be/products/bul
#——————————————————————–#
# SIDC Weekly bulletin on Solar and Geomagnetic activity             #
#——————————————————————–#
WEEK 478 from 2010 Feb 22 

SOLAR ACTIVITY
————-

No significant flares occurred during the period, GOES X-ray levels reached only barely  B2 levels on Feb 23 and Feb 24. A number of active regions where present on this disc: AR1051 in the Northern hemisphere and AR1049 and AR1050  in the Southern hemisphere.

A group of (partial) halo CMEs erupted over the solar North pole on February 28 with a projected speed of about 300km/s.

GEOMAGNETIC ACTIVITY
——————-

No significant geomagnetic activity was observerd during the period. A weak shock arrived in the solar wind on Feb 25 around 15h00. Given the Southward Bz component of the magnetic field and low speeds (~380km/s), the geomagnetic reaction was limited to a Kp=2 episode.
—————————————————————————
DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2010 Feb 22   016    010   84   005   A5.9   0   0
2010 Feb 23   017    009   84   003   A7.6   0   0
2010 Feb 24   041    021   83   004   A6.8   0   0
2010 Feb 25   028    019   83   005   A5.9   0   0
2010 Feb 26   030    017   81   003   A3.8   0   0
2010 Feb 27   023    011   79   001   A3.2   0   0
2010 Feb 28   ///    008   78   003   A2.3   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.                                   #
# To unsubscribe, visit http://sidc.be/registration/unsub.php        #
#——————————————————————–#