Viewing archive of Sunday, 28 January 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jan 28 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
28 Jan 2018	069	005
29 Jan 2018	069	011
30 Jan 2018	068	008

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 declined from about 450 km/s to values just above 350 km/s. Bz varied between -4 and +3 nT (DSCOVR). The interplanetary magnetic field (IMF) was mostly directed towards the Sun, with some brief positive (away) periods.

The geomagnetic field was at quiet levels. Quiet to unsettled geomagnetic conditions are expected, with an active episode possible from the moderate speed wind streams associated with the CHs observed earlier this week.

Today's estimated international sunspot number (ISN): 000, based on 11 stations.

Solar indices for 27 Jan 2018

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	008
AK Wingst	008
Estimated Ap	006
Estimated international sunspot number	000 - Based on 15 stations

Noticeable events summary

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

All times in UTC

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