Viewing archive of Tuesday, 31 October 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Oct 31 1230 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
31 Oct 2017	075	007
01 Nov 2017	075	014
02 Nov 2017	075	016

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 very low, now at 285 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 to the Earth in about 24 h. Active to minor storm conditions expected then.

Today's estimated international sunspot number (ISN): 011, based on 19 stations.

Solar indices for 30 Oct 2017

Wolf number Catania	034
10cm solar flux	///
AK Chambon La Forêt	005
AK Wingst	///
Estimated Ap	004
Estimated international sunspot number	023 - Based on 33 stations

Noticeable events summary

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

All times in UTC

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