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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 Jan 24 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
24 Jan 2018	070	003
25 Jan 2018	069	003
26 Jan 2018	069	005

Bulletin

Solar activity was at very low levels. The Sun is spotless. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Solar wind speed decreased from an initial 470 km/s to current values near 350 km/s (DSCOVR). Bz varied between -3 and +3 nT. The interplanetary magnetic field was directed towards the Sun until about 02UT, after which is was mainly directed away from the Sun. A diffuse extension of the northern polar coronal hole (CH) is transiting the central meridian.

The geomagnetic field was mostly at quiet levels and is expected to remain so, with a chance on an unsettled episode.

Today's estimated international sunspot number (ISN): 000, based on 07 stations.

Solar indices for 23 Jan 2018

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	005
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	000 - Based on 22 stations

Noticeable events summary

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

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