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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2020 Jan 27 1241 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
27 Jan 2020	076	005
28 Jan 2020	076	006
29 Jan 2020	076	005

Bulletin

Solar activity was at low levels with no recorded B or higher class flares in the last 24 hours. Catania Sunspot group 28 (NOAA Active Region 2757) has further developed on the disc and has crossed the central meridian. Solar activity is expected to remain at low levels with a 15% probability for a C class flare.

No Earth-directed CMEs have been observed in the available coronagraph imagery the past 24hours.

The greater than 10 MeV proton flux was at nominal values and is expected to remain so.

The solar wind speed was at nominal levels, ranging from around 300 to 350 km/s (ACE). The total magnetic field remained below 5 nT with Bz fluctuating between -4 nT and 4 nT. The interplanetary magnetic field was predominantly directed towards the Sun (negative phi angle). Minor enhancements of the solar wind speed are expected over the next 48 hours due to the influence of the patchy negative coronal hole, which was facing Earth on January 25th.

The geomagnetic activity over the past 24h has been quiet (NOAA Kp index ranging between 1 to 2) with an isolated unsettled interval where K Dourbes index was equal to 3. Quiet conditions with isolated unsettled periods are expected to continue during Jan 27-29 due to the foreseen enhancements of the solar wind.

Today's estimated international sunspot number (ISN): 014, based on 14 stations.

Solar indices for 26 Jan 2020

Wolf number Catania	///
10cm solar flux	075
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	020 - Based on 22 stations

Noticeable events summary

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

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