Viewing archive of Wednesday, 28 December 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 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 2016	074	006
29 Dec 2016	074	007
30 Dec 2016	073	007

Bulletin

No C flares were observed in the past 24 hours. No C flares are expected in the next 24 hours. Solar wind speed decreased from about 580 to 450 km/s in the past 24 hours as measured by DSCOVR. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 1 and 5 nT. A further decrease in solar wind speed is expected over the next days. Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 1 and 3) were registered in the past 24 hours. Quiet to unsettled levels (K Dourbes < 4) are expected on December 28, 29 and 30.

Today's estimated international sunspot number (ISN): 011, based on 09 stations.

Solar indices for 27 Dec 2016

Wolf number Catania	026
10cm solar flux	074
AK Chambon La Forêt	015
AK Wingst	013
Estimated Ap	015
Estimated international sunspot number	021 - Based on 31 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