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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Nov 01 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
01 Nov 2017	075	014
02 Nov 2017	074	016
03 Nov 2017	072	007

Bulletin

No C-class flares in past 24 h. Only one active region remains visible (NOAA AR 2686, Catania 61) with alpha magnetic field configuration. 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 very low, now at 285 km/s with interplanetary magnetic fields of 3 nT. A sector boundary crossing (going from positive to negative polarity) was observed yesterday around 20:00 UT. Therefore, the high speed solar wind stream from a negative polarity low latitude coronal hole (southern hemisphere) can be expected later today. Active to minor storm geomagnetic conditions foreseen.

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 31 Oct 2017

Wolf number Catania	///
10cm solar flux	075
AK Chambon La Forêt	///
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	/// - Based on /// stations

Noticeable events summary

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

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