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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Oct 30 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
30 Oct 2017	075	007
31 Oct 2017	075	007
01 Nov 2017	075	013

Bulletin

No C-class flares in past 24 h. Both active regions on disk are relatively simple (Mag.Type: Alpha) and quiet. The X-ray flux is expected to remain below C level.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 h.

Geomagnetic conditions have been quiet (k = 1-2). Solar wind speed is now at 310 km/s with interplanetary magnetic fields of 3 nT. A high speed solar wind stream from a negative polarity low latitude coronal hole (southern hemisphere) is expected to arrive in about 48 h. Geomagnetic conditions are expected to be quiet until then, and reach active to minor storm levels after. There is a small and weak low latitude coronal hole north of the equator, its associated fast solar wind stream may arrive earlier, although this is not likely.

Today's estimated international sunspot number (ISN): 023, based on 22 stations.

Solar indices for 29 Oct 2017

Wolf number Catania	///
10cm solar flux	075
AK Chambon La Forêt	005
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	024 - Based on 23 stations

Noticeable events summary

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

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