Viewing archive of Saturday, 30 December 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Dec 30 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
30 Dec 2017	072	007
31 Dec 2017	073	011
01 Jan 2018	074	010

Bulletin

Solar activity was low, no C-class flares in past 24 h. The new compact region that appeared on the northeast limb has not been active. C-class flares are possible but unlikely.

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

Solar wind speed is at 390 km/s with interplanetary magnetic field magnitude of 4 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 48h, active conditions can be expected then (with isolated minor storm periods possible).

Today's estimated international sunspot number (ISN): 000, based on 06 stations.

Solar indices for 29 Dec 2017

Wolf number Catania	///
10cm solar flux	072
AK Chambon La Forêt	010
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	000 - Based on 18 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page