Viewing archive of Wednesday, 17 November 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2021 Nov 17 1231 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
17 Nov 2021	080	018
18 Nov 2021	080	012
19 Nov 2021	080	007

Bulletin

The Sun produced no C flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at 25%.

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 may rise to moderate levels in the next 24 hours. The greater than 2 MeV electron fluence was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

The solar wind speed as registered by DSCOVR varied between about 550 and 660 km/s in the past 24 hours. The Interplanetary Magnetic Field near Earth (IMF) was oriented towards the Sun and its magnitude varied between about 1 and 8 nT. There were no extended intervals with Bz below -5 nT. Enhanced solar wind conditions are expected in the next 24 hours, followed by a gradual return towards nominal levels.

Quiet to unsettled geomagnetic conditions (K-BEL between 2 and 3; NOAA Kp between 2 and 4) were registered in the past 24 hours. Active intervals (K-BEL = 4) are possible on November 17 and 18, with a chance for minor storm intervals (K-BEL = 5). Quiet to unsettled geomagnetic levels are expected on November 19, with a chance for active intervals.

Today's estimated international sunspot number (ISN): 031, based on 08 stations.

Solar indices for 16 Nov 2021

Wolf number Catania	045
10cm solar flux	080
AK Chambon La Forêt	018
AK Wingst	014
Estimated Ap	014
Estimated international sunspot number	032 - Based on 17 stations

Noticeable events summary

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

All times in UTC

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