Prohlížíte si archiv pondělí 18. prosince 2017

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2017 Dec 18 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
18 Dec 2017	070	026
19 Dec 2017	070	022
20 Dec 2017	070	019

Bulletin

The Sun is spotless and no significant flaring activity was recorded. No flaring activity is expected over the next 24 hours. There were no CMEs observed in coronagraph data. The proton flux values are at background levels and are expected to remain so. An elongated negative polarity equatorial coronal hole started transiting the central meridian. It may influence solar wind from November 20 onwards.

Solar wind is under the expected influence of a positive polarity coronal hole high speed stream. Since just after the start of the reporting period solar wind speed has been between 575 and 650 km/s. Total magnetic field was between 5-10nT with negative peaks of Bz down to -7nT. Based on Stereo A Solar wind measurements, the influence of the high speed stream is expected to decay over the next 24 hours. On December 20 we may see some minor influence of the December 15 CME and later on a renewed increase in Solar wind conditions due to the negative polarity equatorial coronal hole currently transiting the central meridian.

Geomagnetic conditions have seen a minor storm period in the afternoon of December 17 with both NOAA Kp and local K Dourbes reaching K=5. Afterwards, quiet to active conditions were reported (NOAA Kp 3-4 and local K Dourbes 2-4). With Solar wind speed still high, periods of active geomagnetic conditions should be anticipated but should become less likely over the next 24-48 hours. Renewed increases of geomagnetic activity may follow starting December 20 caused by the possible December 15 CME influence and later increased Solar wind conditions due to the negative polarity equatorial coronal hole currently transiting the central meridian.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 000, na základě 14 stanic.

Solární indexy za 17 Dec 2017

Wolfovo číslo Catania	///
10cm sluneční tok	071
AK Chambon La Forêt	044
AK Wingst	026
Odhadovaný Ap	028
Odhadovaný mezinárodní počet slunečních skvrn	000 - Na základě 19 stanic

Souhrn významných událostí

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

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