Viewing archive of Tuesday, 27 December 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Dec 27 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
27 Dec 2016	074	014
28 Dec 2016	074	010
29 Dec 2016	074	007

Bulletin

No C flares were observed in the past 24 hours. There is a chance for C flares in the next 24 hours, especially from new beta region NOAA AR 2621. Solar wind speed is still under the influence of a positive coronal hole high speed stream, and decreased from about 660 to 560 km/s in the past 24 hours as measured by DSCOVR. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 2 and 6 nT. A gradual decrease in solar wind speed is expected over the next days as the influence of the high speed stream wanes. Quiet to active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2 and 4) were registered in the past 24 hours. Quiet to unsettled levels (K Dourbes < 4) are expected on December 27, 28 and 29, with a slight chance for active intervals (K Dourbes = 4) on December 27 and 28.

Today's estimated international sunspot number (ISN): 023, based on 22 stations.

Solar indices for 26 Dec 2016

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	031
AK Wingst	026
Estimated Ap	023
Estimated international sunspot number	000 - Based on 29 stations

Noticeable events summary

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

All times in UTC

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