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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Dec 26 1256 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
26 Dec 2016	073	014
27 Dec 2016	073	010
28 Dec 2016	073	007

Bulletin

In the past 24 hours, there were no spotted regions on the Sun, and not a single flare was observed. Very low solar activity (no C flares) is expected in the next 24 hours. Solar wind speed measured by DSCOVR varied between about 610 and 740 km/s in the past 24 hours under the influence of a positive coronal hole high speed stream, while the magnitude of the Interplanetary Magnetic Field (IMF) varied between about 3 and 6 nT. The influence of the high speed stream is expected to continue in the next 24 hours. Quiet to active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2 and 5) were registered in the past 24 hours. Quiet to active levels (K Dourbes < 5) are expected on December 26 and 27, with a slight chance for minor storm episodes (K Dourbes = 5). Quiet to unsettled levels (K Dourbes < 4) are expected on December 28.

Today's estimated international sunspot number (ISN): 000, based on 25 stations.

Solar indices for 25 Dec 2016

Wolf number Catania	///
10cm solar flux	073
AK Chambon La Forêt	031
AK Wingst	023
Estimated Ap	022
Estimated international sunspot number	000 - Based on 18 stations

Noticeable events summary

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

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