Prohlížíte si archiv úterý 28. listopadu 2017

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2017 Nov 28 1230 UTC

SIDC Předpověď

Sluneční erupce

Quiet conditions (<50% probability of C-class flares)

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sluneční protony

Quiet

	10cm tok	Ap
28 Nov 2017	074	009
29 Nov 2017	073	013
30 Nov 2017	073	005

Bulletin

Solar activity was at very low levels. NOAA 2689 is the only visible sunspot group and is gradually decaying. The prominent 40 degrees long filament in the SW quadrant was quiet. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Quiet flaring conditions are expected, with a slight chance on an isolated C-class flare.

Earth was under the influence of the wind stream from the extensions of the negative polar coronal hole (CH). Solar wind speed peaked near 490 km/s around 14UT and again around 01UT (DSCOVR), ending the period with values around 440 km/s (ACE). Bz was mostly positive, except for a period from 23UT till 01UT with sustained negative values around -8 nT. The interplanetary magnetic field was mostly directed towards the Sun.

The geomagnetic field was quiet throughout the period, except for the 00-03UT interval when Kp was at active levels. Quiet to unsettled conditions are expected as Earth remains under the influence from the weak CH wind stream. A glancing blow from the 25 November CME late on 28 or on 29 November may add to the geomagnetic unrest and result in unsettled to active conditions.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 015, na základě 19 stanic.

Solární indexy za 27 Nov 2017

Wolfovo číslo Catania	015
10cm sluneční tok	074
AK Chambon La Forêt	013
AK Wingst	006
Odhadovaný Ap	004
Odhadovaný mezinárodní počet slunečních skvrn	017 - Na základě 13 stanic

Souhrn významných událostí

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