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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2017 Dec 26 1230 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
26 Dec 2017	075	007
27 Dec 2017	074	007
28 Dec 2017	072	007

Bulletin

Solar activity was low, no C-class flares in past 24 h. There is only one region visible on disk (Catania group 67, NOAA active region 2692) with beta magnetic field configuration. C-class flaring is possible, although not very likely.

Proton flux levels are at background values and are expected to remain so. No Earth-directed seems were observed.

Solar wind speed is at 470 km/s with interplanetary magnetic field magnitude of 6 nT. Geomagnetic conditions ranged from quiet to unsettled in past 24 h. The low latitude extension of the southern polar coronal hole (negative polarity) may still influence the Earth in the next 24 h, active conditions can be expected then, otherwise mostly quiet conditions will prevail.

Today's estimated international sunspot number (ISN): 015, based on 13 stations.

Solar indices for 25 Dec 2017

Wolf number Catania	///
10cm solar flux	076
AK Chambon La Forêt	021
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	022 - Based on 11 stations

Noticeable events summary

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

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