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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2020 Jan 22 1231 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
22 Jan 2020	071	005
23 Jan 2020	071	004
24 Jan 2020	072	004

Bulletin

Solar activity was at very low levels. No significant flares have been recorded. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10 MeV proton flux was at nominal values. Solar activity is expected to remain at very low levels.

The increase in the total magnetic field observed from 9 UT Jan 21, as reported in the previous bulletin, continued to develop into an extended feature with a maximum of near 10 nT recorded. The solar wind speed gradually increased from 300 to 400 km/s (ACE). This may signify the arrival of the solar wind associated with the weak negative coronal hole, which passed the central meridian on Jan 16. For the majority of the period the magnetic field oscillated around 7 nT, while Bz varied between -9 and +7 nT. The interplanetary magnetic field (phi angle) was predominantly directed towards the Sun (negative sector).

Geomagnetic activity was quiet to unsettled, with the Kp index (NOAA) and the local k index (Dourbes) recording values of between 1 and 3. Mostly quiet conditions are expected on Jan 22-24, with possible continued unsettled periods on Jan 22 in response to any extended periods of strong negative Bz.

Today's estimated international sunspot number (ISN): 000, based on 12 stations.

Solar indices for 21 Jan 2020

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	014
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	000 - Based on 24 stations

Noticeable events summary

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

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