mercoledì 11 gennaio 2012

SIDC Weekly Bulletin

:Issued: 2012 Jan 09 2204 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity            #
#--------------------------------------------------------------------#
WEEK 575 from 2012 Jan 02 

SOLAR ACTIVITY
--------------

Solar activity has been at eruptive levels throughout the whole week, with one or more C flares every day. All of the following NOAA AR have produced one or more C flares: 11388, 11389, 11390, 11392 and 11393.


GEOMAGNETIC ACTIVITY
--------------------

Solar wind speeds measured by ACE have ranged from about 350 to about 450 km/s, whereas the IMF has varied between about 4 and 12 nT. A predicted Coronal Hole high speed stream arrived on January 6, with moderate associated solar wind speeds of about 450 km/s until January 8 inclusive. Though active intervals were predicted for the arrival of the high speed stream, geomagnetic conditions have been quiet throughout the week.


---------------------------------------------------------------------------
DAILY INDICES
DATE          RC  EISN  10CM  Ak  BKG    M  X
2012 Jan 02  111    063  135  004  B4.1  0  0
2012 Jan 03  158    076  135  008  B4.1  0  0
2012 Jan 04  181    080  136  003  B3.9  0  0
2012 Jan 05  141    070  141  005  B4.3  0  0
2012 Jan 06  ///    076  136  009  B4.8  0  0
2012 Jan 07  ///    078  141  008  B6.1  0  0
2012 Jan 08  ///    067  136  006  B6.1  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                                          #
#--------------------------------------------------------------------#