Viewing archive of Friday, 26 January 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jan 26 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
26 Jan 2018	070	012
27 Jan 2018	069	015
28 Jan 2018	069	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 became enhanced as the wind speed, initially steady at 420 km/s, started a gradual increase around 01UT to values near 500 km/s by the end of the period. Bz oscillated between -6 and +7 nT (DSCOVR). The interplanetary magnetic field (IMF) was mostly directed towards the Sun. A small negative equatorial coronal hole (CH) is transiting the central meridian.

The geomagnetic field was at quiet to unsettled levels and is expected to remain so during the next few days. An active episode is possible from the moderate speed wind streams associated with the observed CHs.

Today's estimated international sunspot number (ISN): 000, based on 09 stations.

Solar indices for 25 Jan 2018

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	015
AK Wingst	010
Estimated Ap	009
Estimated international sunspot number	000 - Based on 13 stations

Noticeable events summary

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

All times in UTC

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