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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2017 Jun 01 1232 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
01 Jun 2017	074	019
02 Jun 2017	075	026
03 Jun 2017	077	017

Bulletin

Solar activity has increased with the rotation of a new active region (Catania group 29, NOAA Active Region 2661) over the East limb which has produced several C flares over past 24 hours. The strongest was a C6.6. flare peaking at 1:43UT. Analysis of the complexity of this region will improve as it rotates further into view but meanwhile further flaring at C level should be anticipated from this region, with a small chance for M flares. The C6.6. flare was associated with an Eastbound CME visible in SoHO/LASCO C2 coronagraph images from 2:12UT onwards. It is narrow and directed well off the sun-Earth line so that it will not have any consequences on Earth. No other Earth directed CMEs have been observed in coronagraph data. The proton flux levels were at background values, and are expected to remain so.

Solar wind dropped to nominal values of 380 km/s at the start of the period and has been decreasing to 320 km/s currently. Total magnetic field remained in the 6-8nT range throughout most of the period, with a decrease to around the 3nT level after 9:00UT. Bz was variable and the phi angle was steadily in the positive sector until the drop of the total magnetic field. Solar wind may see a renewed enhancement associated to the high speed stream from the equatorial coronal hole later today or tomorrow. Geomagnetic conditions were mainly quiet (local K Dourbes and NOAA Kp 0-2) with only two isolated periods of K=3 at Dourbes. Geomagnetic conditions could increase over the next 24-48 hours to active levels with the anticipated enhancements due to the high speed stream.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 014, na základě 26 stanic.

Solární indexy za 31 May 2017

Wolfovo číslo Catania	000
10cm sluneční tok	074
AK Chambon La Forêt	009
AK Wingst	005
Odhadovaný Ap	004
Odhadovaný mezinárodní počet slunečních skvrn	/// - Na základě /// stanic

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