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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2020 Dec 18 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
18 Dec 2020	082	002
19 Dec 2020	082	003
20 Dec 2020	082	003

Bulletin

The Sun has not produced any B flare or higher in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at only 5%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron fluence was at nominal levels during the past 24 hours, and is expected to remain so in the next 24 hours.

Solar wind speed near Earth as registered by DSCOVR varied between about 265 and 300 km/s in the past 24 hours. The orientation of the Interplanetary Magnetic Field (IMF) was predominantly positive (away from the Sun) and its magnitude varied between about 1 and 8 nT. Bz was never below -5 nT. Nominal solar wind conditions are expected in the next days.

Quiet geomagnetic conditions (K Dourbes between 0 and 1; NOAA Kp between 0 and 1) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on December 18, 19 and 20.

Today's estimated international sunspot number (ISN): 004, based on 12 stations.

Solar indices for 17 Dec 2020

Wolf number Catania	012
10cm solar flux	082
AK Chambon La Forêt	003
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	011 - Based on 19 stations

Noticeable events summary

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

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