Viewing archive of Sunday, 31 December 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Dec 31 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
31 Dec 2017	070	010
01 Jan 2018	069	010
02 Jan 2018	068	007

Bulletin

Solar activity was low, no C-class flares in past 24 h. The situation is not expected to change, as there are no active regions on disk.

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

Solar wind speed is at 360 km/s with interplanetary magnetic field magnitude of 5 nT. Geomagnetic conditions have been quiet. There is a small positive coronal hole located at 30 degrees northern latitude which may affect the Earth within 24h (although its associated solar wind stream may pass north of the Earth), active conditions can be expected then (with isolated minor storm periods possible).

Today's estimated international sunspot number (ISN): 007, based on 12 stations.

Solar indices for 30 Dec 2017

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	008
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	000 - Based on 13 stations

Noticeable events summary

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

All times in UTC

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