SIDC Weekly Bulletin

:Issued: 2020 Sep 21 1251 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 1029 from 2020 Sep 14
SOLAR ACTIVITY
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The Sun was spotless throughout the week and there were no flares. The GOES
X-ray flux background was around A0.5-A1 level. There were no
Earth-directed CMEs and the greater than 10 MeV proton flux and the greater
than 2 MeV electron flux were at nominal levels throughout the week.
GEOMAGNETIC ACTIVITY
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TThe solar wind as registered by DSCOVR was at nominal levels throughout
the week. Solar wind speeds varied between about 270 and 435 km/s. The
Interplanetary Magnetic Field had alternating orientation between away from
the Sun and towards the Sun and magnitude between about 0 and 10 nT. Bz was
below -5 nT for several intervals on September 14, with a lowest value
slightly below -8 nT, but both K Dourbes and NOAA Kp levels did not exceed
3.
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DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2020 Sep 14   ///    003   069   013   ////   0   0   
2020 Sep 15   000    000   069   006   ////   0   0   
2020 Sep 16   ///    000   070   004   ////   0   0   
2020 Sep 17   ///    000   070   002   ////   0   0   
2020 Sep 18   ///    000   070   004   ////   0   0   
2020 Sep 19   ///    000   071   003   A1.6   0   0   
2020 Sep 20   ///    000   070   004   A1.6   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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