Просмотр архива за суббота, 29 ноября 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2014 Nov 29 1223 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Quiet (A<20 and K<4)

Солнечные протоны

Quiet

	10cm flux	Ap
29 Nov 2014	184	006
30 Nov 2014	186	007
01 Dec 2014	188	007

Bulletin

NOAA 2222 continues its steady growth, with some magnetic polarity mixing in the middle portion and just behind the main leading spot. It produced 3 C-class flares, including the strongest event of the last 24 hours (an impulsive C6.7 peaking at 08:21UT). Nearly spotless NOAA 2224 (Catania 22) and NOAA 2219 produced resp. 1 and 4 C-class flares. The other sunspot regions were quiet, with an active region rounding the southeast limb. A large filament on the northern hemisphere just west of the central meridian erupted on 28 November between 14:30 and 17:00UT. The eruption may have been triggered by some activity in reversed polarity region NOAA 2223, at the south end of the filament. There does not seem to be an obvious CME associated to this event. None of the observed CMEs is Earth directed. C-class flaring is expected, with a small chance on low- level M-class flares. Solar wind speed varied between 350 and 410 km/s. The IMF is directed towards the Sun, with Bz mostly positive varying between 0 and +12 nT. Brief negative excursions to -12 nT were observed near 12:00UT (28 November) and between 03:00-04:00UT (29 November). The geomagnetic field was quiet to unsettled (K<4) and is expected to remain so.

Today's estimated international sunspot number (ISN): 118, based on 13 stations.

Solar indices for 28 Nov 2014

Wolf number Catania	///
10cm solar flux	181
AK Chambon La Forêt	008
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	103 - Based on 16 stations

Noticeable events summary

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

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