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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Oct 19 1230 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
19 Oct 2017	073	008
20 Oct 2017	074	007
21 Oct 2017	075	007

Bulletin

The Sun produced no flares in the past 24 hours. The probability for a C flare in the next 24 hours is estimated at 25%, mostly from returning NOAA region 2682 which is approaching the East limb. No Earth- directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. Solar wind speed measured by DSCOVR varied between about 340 and 400 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was predominantlty directed away from the Sun and its magnitude ranged between about 2 and 10 nT. Bz was predominantly negative, but there were no extended intervals with Bz below -5 nT. Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 0 and 3) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels are expected on October 19, 20 and 21.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 18 Oct 2017

Wolf number Catania	000
10cm solar flux	073
AK Chambon La Forêt	014
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	000 - Based on 29 stations

Noticeable events summary

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

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