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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 Sep 03 1230 UTC

SIDC Forecast

Brillamenti solari

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
03 Sep 2018	068	004
04 Sep 2018	068	005
05 Sep 2018	068	004

Bulletin

Solar activity was at very low levels. No earth-directed coronal mass ejections (CMEs) were observed. A weak CME visible between 18 and 24UT on 2 September (LASCO) proved to be directed away from Earth based on STEREO-A coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. A small negative polarity coronal hole is about to start its transit of the Central Meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed varied between 310 and 360 km/s, ending the period near 330 km/s (DSCOVR). Bz varied mostly between -5 and +4 nT. The interplanetary magnetic field was initially directed towards the Sun, but moved to a more variable mode late on 2 September. Quiet geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected to continue, with a chance on an isolated unsettled episode.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 02 Sep 2018

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	008
AK Wingst	008
Estimated Ap	005
Estimated international sunspot number	000 - Based on 31 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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