Viewing archive of Wednesday, 31 December 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Dec 31 1211 UTC

SIDC Forecast

Solar flares

Eruptive (C-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
31 Dec 2014	128	007
01 Jan 2015	126	007
02 Jan 2015	126	008

Bulletin

There are currently 6 sunspot regions visible on the solar disk. Six C1 flares were produced: 3 by NOAA 2253, 2 by NOAA 2250 and 1 by NOAA 2251. NOAA 2253 is currently the most complex sunspot region, showing some mixed polarities. No significant or earth-directed CMEs were detected. Further C-class flaring is likely, in particular from NOAA 2253. Solar wind speed continued its gradual decline from its initial value of about 670 km/s to its current 500 km/s. Bz varied between mostly -4 and +3 nT. The geomagnetic field was mostly unsettled during the first half of the period, then turned to quiet conditions. Quiet to unsettled conditions are expected, though an active episode cannot be excluded.

Today's estimated international sunspot number (ISN): 071, based on 16 stations.

Solar indices for 30 Dec 2014

Wolf number Catania	///
10cm solar flux	130
AK Chambon La Forêt	018
AK Wingst	014
Estimated Ap	016
Estimated international sunspot number	072 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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