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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2018 Dec 24 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
24 Dec 2018	070	003
25 Dec 2018	070	003
26 Dec 2018	070	003

Bulletin

Solar activity was at very low levels. The Sun was spotless. A small eruption with coronal dimming was observed on 24 December around 06:25UT in a region about 30 degrees beyond the east limb (Farside; STEREO-A/EUVI). The associated coronal mass ejection (CME) was not directed to Earth. No other coronal mass ejections were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values. A narrow extension of the positive polarity northern polar coronal hole (CH) has started its transit of the central meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed varied mostly between 300 and 350 km/s (DSCOVR). Bz ranged from -3 to +3 nT, ending the period at +5 nT. The interplanetary magnetic field was predominately directed towards the Sun (negative sector). Quiet geomagnetic conditions were observed.

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

Today's estimated international sunspot number (ISN): 000, based on 13 stations.

Solar indices for 23 Dec 2018

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	000 - Based on 11 stations

Noticeable events summary

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

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