Viewing archive of Thursday, 28 December 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Dec 28 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
28 Dec 2017	072	007
29 Dec 2017	070	007
30 Dec 2017	068	007

Bulletin

Solar activity was low, no C-class flares in past 24 h. The situation is not expected to change in the coming hours. There is only one region visible on disk (Catania group 67, NOAA active region 2692) that went from beta (yesterday) to alpha (today) magnetic field configuration.

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

Solar wind speed is at 430 km/s with interplanetary magnetic field magnitude of 3 nT. Geomagnetic conditions have been quiet and are not expected to change in the next 48 h.

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 27 Dec 2017

Wolf number Catania	014
10cm solar flux	071
AK Chambon La Forêt	012
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	013 - Based on 17 stations

Noticeable events summary

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

All times in UTC

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