Prohlížíte si archiv čtvrtek 28. září 2017

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2017 Sep 28 1230 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

Major (ISES: Severe) magstorm expected (A>=100 or K>=7)

Sluneční protony

Quiet

	10cm tok	Ap
28 Sep 2017	092	071
29 Sep 2017	090	017
30 Sep 2017	089	006

Bulletin

Over the past 24 hours solar activity has been very low. Three numbered active regions on the visible side of solar disk reduced their magnetic complexity (from Beta to Alpha class) and have not shown any flaring activity. 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. Solar activity is expected to remain low over the next 24 hours with a small chance of C-class flares. The Earth is presently inside the fast solar wind stream with the speed of about 710 km/s. The interplanetary magnetic field magnitude decreased from 14 nT till about 4 nT over the past 24 hours. Arrival of the interaction region between the slow and the fast solar wind from a low-latitude extension of the northern polar coronal hole induced yesterday at 18UT moderate geomagnetic storm conditions: NOAA Kp = 6 (with local K = 4 at Dourbes). The interaction region was followed by the fast stream, with the solar wind speed reaching 690 km/s which induced strong geomagnetic storm at 03UT today: NOAA Kp = 7 (with local K = 5 at Dourbes). The solar wind speed is still rather high, however interplanetary magnetic field variations slightly decreased few hours ago. Geomagnetic conditions are presently at minor storm level (Kp = 5 from 12 UT today), and we expect active to minor storm level (Kp up to 5) conditions in the coming hours.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 048, na základě 19 stanic.

Solární indexy za 27 Sep 2017

Wolfovo číslo Catania	///
10cm sluneční tok	091
AK Chambon La Forêt	064
AK Wingst	034
Odhadovaný Ap	035
Odhadovaný mezinárodní počet slunečních skvrn	042 - Na základě 26 stanic

Souhrn významných událostí

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

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