Prohlížíte si archiv pondělí 12. února 2018

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2018 Feb 12 1304 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

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

Sluneční protony

Quiet

	10cm tok	Ap
12 Feb 2018	077	012
13 Feb 2018	078	012
14 Feb 2018	077	005

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a C1.5 class flare. Active Region (AR) 2699 (Mcintosh class:Dai; Mag. type:Beta) has been most active, showing considerable flux emergence and cancellation, producing the C1.5-class flare, which peaked at 01:35 UT this morning (12-feb-2018). The greater than 10MeV proton flux remained at background levels over the past 24 hours. Observations of coronal dimmings and EUV waves from EUV imagery yesterday at 20:40 UT (11-Feb-2018) and today at 01:41 UT suggests AR 2699 produced a couple of eruptions. Coronagraph imagery is currently unavailable to estimate the extent of any associated CMEs, and estimate a possible arrival time, but the source region is located near disk centre and any associated eruption may interact with the Earth. AR 2699 is expected to produce further flares and eruptions. The solar wind speed has increased from around 300 to 325 km/s over the past 24 hours. The total magnetic field strength has remained around 5 nT. The Bz component was largely positive, fluctuating between -5 and +5 nT. Geomagnetic conditions ranged between Kp index 0-2 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours. A small positive polarity coronal hole passed the central meridian a couple of days ago and may enhance solar wind speeds over the coming days. Evidence of a small eruption that occurred near disk centre this morning may indicate an eruption will enhance geomagnetic conditions in a few days. Geomagnetic conditions are expected to be quiet to unsettled.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 027, na základě 19 stanic.

Solární indexy za 11 Feb 2018

Wolfovo číslo Catania	///
10cm sluneční tok	078
AK Chambon La Forêt	005
AK Wingst	002
Odhadovaný Ap	001
Odhadovaný mezinárodní počet slunečních skvrn	030 - Na základě 18 stanic

Souhrn významných událostí

Poskytuje Centrum pro analýzu dat o solárních vlivech© - SIDC - Zpracováno SpaceWeatherLive

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