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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2017 Aug 21 1230 UTC

SIDC Předpověď

Sluneční erupce

M-class flares expected (probability >=50%)

Geomagnetismus

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

Sluneční protony

Quiet

	10cm tok	Ap
21 Aug 2017	086	015
22 Aug 2017	087	008
23 Aug 2017	088	007

Bulletin

Active Region (AR) 2671 (McIntosh class: Fkc; Mag.type: Beta- Gamma) has shown some evidence of flux emergence in HMI magnetogram observations; however it produced only B-class flares over the past 24 hours. The largest flare among them was a B9.3 flare peaking at 07:40UT today. New active region 2672 (McIntosh class: Dao; Mag.type: Beta) has rotated into view from the eastern limb today and already produced three C-class flares. The largest flare was C5.9 flare peaking at 03:16 UT. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10MeV proton flux remained at background levels over the past 24 hours. There are no potentially geoeffective coronal holes on the Sun. More C-class flares are expected over the next 24 hours with some probability of M-class flares. The solar wind speed has decreased from around 730 to 570 km/s over the past 24 hours. The total magnetic field strength has remained below 5 nT. The Bz component fluctuated between -4 and +4.5 nT. The geomagnetic field was at active to unsettled levels; Kp NOAA index ranged between 2-3 and local K index (Dourbes) between 1 and 4. Mostly quiet to unsettled geomagnetic conditions are expected for the next few days.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 061, na základě 19 stanic.

Solární indexy za 20 Aug 2017

Wolfovo číslo Catania	///
10cm sluneční tok	086
AK Chambon La Forêt	020
AK Wingst	023
Odhadovaný Ap	027
Odhadovaný mezinárodní počet slunečních skvrn	059 - Na základě 26 stanic

Souhrn významných událostí

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

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