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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 Nov 22 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
22 Nov 2017	074	012
23 Nov 2017	074	005
24 Nov 2017	074	004

Bulletin

Over the past 24 hours solar activity has been quiet. No significant flares have been recorded. All Active Regions (AR) have shown low levels of activity. No Earth directed Coronal Mass Ejections (CMEs) have been detected. A small back-sided CME was detected off of the West solar limb, but is not expected to reach the Earth. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. The solar wind speed been decreasing from 650 to 500 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 5 nT. The Bz component has fluctuated between positive and negative, between -5 and +5 nT. Geomagnetic conditions ranged between Kp index 2-5 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours. A positive polar coronal hole was positioned in the Western hemisphere of the Sun and produced a high- speed stream (HSS) that enhanced solar wind speeds and as a consequence increased geo-activity levels. Geomagnetic conditions are expected to return to quiet conditions throughout the day.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 21 Nov 2017

Wolf number Catania	///
10cm solar flux	073
AK Chambon La Forêt	035
AK Wingst	029
Estimated Ap	031
Estimated international sunspot number	000 - Based on 16 stations

Noticeable events summary

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

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