Viewing archive of Tuesday, 23 January 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jan 23 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
23 Jan 2018	070	005
24 Jan 2018	069	004
25 Jan 2018	069	003

Bulletin

Solar activity was at very low levels. Spotless region NOAA 2696 was quiet. No earth-directed 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.

Earth is under the weakening influence of the wind stream from the trans- equatorial extension of the negative southern polar coronal hole (CH). Solar wind speed gradually decreased from an initial range between 520-550 km/s to a current range between 470-500 km/s (DSCOVR). Bz varied between -4 and +4 nT. The interplanetary magnetic field was mostly directed towards the Sun.

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

Today's estimated international sunspot number (ISN): 000, based on 14 stations.

Solar indices for 22 Jan 2018

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	021
AK Wingst	013
Estimated Ap	014
Estimated international sunspot number	000 - Based on 22 stations

Noticeable events summary

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

All times in UTC

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