SIDC Weekly Bulletin

:Issued: 2019 Oct 14 1512 UTC
:Product: documentation at http://www.sidc.be/products/bul
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# SIDC Weekly bulletin on Solar and Geomagnetic activity             #
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WEEK 980 from 2019 Oct 07
SOLAR ACTIVITY
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Solar activity was very low throughout the period. No earth-directed
coronal mass ejections (CMEs) have been observed in available coronagraphic
imagery. The greater than 10 MeV proton flux was at nominal values. A
patchy negative polarity coronal hole in the southern solar hemisphere
transited the central meridian on 10 October.
GEOMAGNETIC ACTIVITY
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The solar wind speed ranged between 320 and 520 km/s (ACE), with the
slightly elevated levels occurring on October 10-11. The interplanetary
magnetic field (phi angle) was directed mostly away from the Sun (positive
sector), except on October 9, when it switched to the negative sector for
approximately one day. Bz varied between -9 and +9 nT, with two periods of
strong negative Bz on October 9 and 10.

Geomagnetic activity ranged from quiet to active conditions, with the
active episodes occurring during the enhanced solar wind conditions on
October 9 and 10.
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DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2019 Oct 07   ///    000   068   010   A2.1   0   0   
2019 Oct 08   000    000   067   006   A2.1   0   0   
2019 Oct 09   000    000   068   008   A2.3   0   0   
2019 Oct 10   ///    000   068   014   A2.7   0   0   
2019 Oct 11   000    000   069   010   A2.7   0   0   
2019 Oct 12   ///    000   068   006   A3.0   0   0   
2019 Oct 13   ///    000   067   001   A3.4   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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