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

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:Issued: 2018 Jun 19 0811 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity             #
#--------------------------------------------------------------------#
WEEK 911 from 2018 Jun 11
SOLAR ACTIVITY
---------------
Solar activity was very low throughout the week with only a couple of
isolated minor B flares from Catania group 86, (NOAA region 2713). That
region rotated on disk at the start of the period and was mostly stable and
later in decay.

No Earth directed CMEs were observed in coronagraph data throughout the
week.

Solar proton flux levels remained at background values.
GEOMAGNETIC ACTIVITY
---------------------
Solar wind conditions were nominal with solar wind speed around 300 km/s
and total magnetic field mostly between 2-6 nT, with a variable Bz
component of the magnetic field. The magnetic field phi angle indicated a
negative sector connection during most of the period.
Around noon June 17, a sector change to positive orientation was seen,
followed by an increase in magnetic field to 15nT and also solar wind speed
starting an increase to just over 400 km/s by midnight June 17-18.
This marked the first onset of the expected influence from the high speed
stream by the positive polarity coronal hole in the northern hemisphere
that had passed the central meridian June 14-15.

Geomagnetic conditions were quiet to unsettled (local K Dourbes 0-3 and
NOAA Kp 0-2).
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DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2018 Jun 11   000    000   070   ///   A2.3   0   0   
2018 Jun 12   013    012   070   ///   A2.6   0   0   
2018 Jun 13   ///    016   071   ///   A3.0   0   0   
2018 Jun 14   017    016   072   ///   A2.7   0   0   
2018 Jun 15   016    015   071   ///   A2.5   0   0   
2018 Jun 16   ///    015   071   ///   A2.1   0   0   
2018 Jun 17   ///    014   071   ///   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.