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Daily bulletin on solar and geomagnetic activity from the SIDC

Datum verslag: 2019 Apr 03 1230 UTC

SIDC Forecast

Zonnevlammen

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Proton Flux monitor

Quiet

	10cm flux	Ap
03 Apr 2019	071	022
04 Apr 2019	071	021
05 Apr 2019	071	016

Bulletin

The Sun did not produce any flares in the past 24 hours. The chance for a C flare in the next 24 hours, especially from beta region NOAA AR 2737, is estimated at 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.

Solar wind speed near Earth as registered by DSCOVR varied between about 340 and 450 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was directed predominantly towards the Sun and its magnitude varied between about 1 and 8 nT. There were no long periods with Bz below -5 nT.

Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 1 and 4) were registered in the past 24 hours. Active to minor storm intervals (K Dourbes = 4-5) are possible on April 3 and 4, due to the expected arrival of the high speed stream associated with a negative polarity coronal hole. Active intervals (K Dourbes = 4) are possible on April 5.

Today's estimated international sunspot number (ISN): 019, based on 14 stations.

Solar indices for 02 Apr 2019

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	018
AK Wingst	009
Estimated Ap	008
Estimated international sunspot number	018 - Based on 23 stations

Noticeable events summary

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

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