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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2021 Jan 19 1234 UTC

SIDC Forecast

Valid from 1230 UTC, 19 Jan 2021 until 21 Jan 2021
Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

10cm fluxAp
19 Jan 2021074009
20 Jan 2021075009
21 Jan 2021074008

Bulletin

Solar flaring activity remains low, with only isolated B-class flares reported. All the flaring activity originates from the NOAA AR 2797, the only numbered sunspot group presently observed on the visible side of the solar disc. We expect a low level of flaring activity to persist in the coming hours with occasional B-class flares. The isolated C-class flares are possible, but not very probable. During last 24 hours no Earth directed CMEs were observed in coronagraph data, and proton flux levels remained at background values.

The solar wind speed is presently around 320 km/s and it is slowly increasing. This increase might be due to the possible arrival of solar wind associated with the low latitude extension of the southern polar coronal hole. The interplanetary magnetic field magnitude is about 5 nT. The geomagnetic conditions are presently quiet and we expect quiet to unsettled geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 017, based on 09 stations.

Solar indices for 18 Jan 2021

Wolf number Catania///
10cm solar flux075
AK Chambon La Forêt009
AK Wingst///
Estimated Ap004
Estimated international sunspot number012 - Based on 20 stations

Noticeable events summary

DayBeginMaxFineLocStrengthOP10cmCatania/NOAARadio burst types
Nessuna

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

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Notizie sul meteo spaziale

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Ultimo brillamento M2025/04/01M2.5
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