Viewing archive of Friday, 28 November 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Nov 28 1227 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
28 Nov 2014	182	007
29 Nov 2014	184	006
30 Nov 2014	186	007

Bulletin

NOAA 2222 has increased its sunspot area, but somewhat simplified its magnetic configuration, resulting in only 3 low-level C-class flares. To the southwest of this region, Catania 22 produced the strongest flare of the last 24 hours (C7.5 peaking at 00:40UT). The other sunspot regions were quiet, with NOAA 2219 still having some mixed polarities. The x-ray background flux has decreased to the C1 level. A filament eruption occurred between 04:45 and 05:45UT near and to the NW of NOAA 2222. The associated CME became first visible in LASCO/C2 at 05:48UT. It is not Earth-directed, like the other CMEs observed over the last 24 hours. C-class flaring is expected, with a chance on a low-level M-class flare. Solar wind speed gradually declined and varied between 400 and 350 km/s. The IMF is directed towards the Sun, with Bz mostly positive and varying between -10 and +10 nT. The geomagnetic field was quiet to unsettled (K<4) and is expected to remain so.

Today's estimated international sunspot number (ISN): 104, based on 10 stations.

Solar indices for 27 Nov 2014

Wolf number Catania	215
10cm solar flux	179
AK Chambon La Forêt	011
AK Wingst	009
Estimated Ap	008
Estimated international sunspot number	106 - Based on 15 stations

Noticeable events summary

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

All times in UTC

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