SIDC Weekly Bulletin

Review of past solar and geomagnetic activity.
Source SIDC (RWC-Belgium)
Frequency Weekly
Format Plain text
Mail header SIDC Weekly Bulletin
SIDC code bul

Archive

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:Issued: 2017 Oct 16 1214 UTC
:Product: documentation at http://www.sidc.be/products/bul
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# SIDC Weekly bulletin on Solar and Geomagnetic activity             #
#--------------------------------------------------------------------#
WEEK 876 from 2017 Oct 09
SOLAR ACTIVITY
---------------
Solar activity was very low. NOAA 2683 (Catania 57) had rotated over the
west limb early 8 October and the Sun remained spotless till almost the end
of the week. Only late on 15 October new small region 2684 was numbered by
NOAA. No earth-directed CMEs were observed throughout the week. Integral
proton flux for protons with energies above 10 MeV remained at background
level.
GEOMAGNETIC ACTIVITY
---------------------
From 11 October the earth environment was under the influence of a high
speed stream from a positive polarity coronal hole (CH). Solar wind speed
gradually increased starting on 11 October from about 350 km/s to peaks
near 710 km/s by noon on 14 October. Bz was oscillating between -9 and +9
nT (on 11 October) with slowly decreasing amplitude of oscillations till -5
and +5 nT (on 14 October).

Mostly active to minor storm geomagnetic conditions were observed
throughout the week, only on 14 October two episodes of moderate
geomagnetic storm were observed.
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DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2017 Oct 09   000    000   072   003   A7.7   0   0   
2017 Oct 10   000    000   071   003   A2.1   0   0   
2017 Oct 11   000    000   070   031   A1.1   0   0   
2017 Oct 12   000    000   070   030   A1.4   0   0   
2017 Oct 13   000    000   070   033   A1.8   0   0   
2017 Oct 14   ///    000   069   029   A1.8   0   0   
2017 Oct 15   ///    000   070   022   A2.5   0   0   
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# 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 SUMMARY
DAY BEGIN MAX  END  LOC    XRAY OP  10CM Catania/NOAA RADIO_BURST_TYPES 
NONE
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Details

This report is sent once a week, typically on a monday.
The weekly bulletin gives an overview of solar and geomagnetic activity of the past week and includes a noticeable solar events list.
Check the ISES code book for information on ISES codes.