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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Dec 24 1247 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
24 Dec 2016	073	012
25 Dec 2016	072	012
26 Dec 2016	071	011

Bulletin

Solar activity was very quiet in the past 24 hours. No flares, no coronal mass ejections were observed. There are no NOAA numbered active regions (ARs) observed on the visible side of the Sun. Two NOAA Halpha plages 2619 and 2620 are rotating across the west solar limb. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a small chance of B-class flares. The solar wind speed has slightly decreased from 720 km/s to 620 km/s over the past 24 hours. The total magnetic field strength has fluctuated between 6.5 nT and 3.5 nT. The Bz component has fluctuated between -4 nT and +4 nT. Geomagnetic conditions were ranged between Kp index 2-4 (NOAA) and local K index 1-5 (Dourbes) over the past 24 hours, with the singular enhance value from Dourbes K=5 (during 18-21 UT time slot yesterday, 23-12-2016). Enhanced solar wind variations are decreasing from this morning (00UT, 24-Dec-2016) and they are going to fade over the next couple of days. As a consequence geomagnetic conditions are expected to be active to unsettled to for the next couple of days (Kp index <= 4).

Today's estimated international sunspot number (ISN): 000, based on 11 stations.

Solar indices for 23 Dec 2016

Wolf number Catania	011
10cm solar flux	074
AK Chambon La Forêt	032
AK Wingst	021
Estimated Ap	024
Estimated international sunspot number	000 - Based on 21 stations

Noticeable events summary

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

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