Prohlížíte si archiv pátek 16. října 2015

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2015 Oct 16 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
16 Oct 2015	112	017
17 Oct 2015	116	026
18 Oct 2015	120	012

Bulletin

NOAA 2434 increased its sunspot area and developed a delta structure in its leading portion. Its flaring frequency and intensity increased with a total of 11 C-class flares and 2 impulsive M1.1 flares, peaking resp. at 23:31UT and 06:16UT. Old active region NOAA 2420, currently still behind the northeast limb, announced its return by producing a C4.9 flare at 23:05UT. The leading portion of old active region 2422 has started to round the southeast limb. The other sunspot regions have been quiet. Based on currently available coronagraphic imagery, no earth-directed coronal mass ejections (CMEs) have been observed.

There's a good chance on more M-class flares, from NOAA 2434 as well as from the returning regions NOAA 2420 and NOAA 2422.

Solar wind speed showed a declining trend and ranged between 450 km/s and 360 km/s. Bz was mostly negative with values near -7 nT until about 08:00UT, when it gradually turned positive with values up to +3 nT. This coincided with a change in the direction of the interplanetary magnetic field (IMF) from mostly negative (towards the Sun) to positive (away from the Sun). Quiet to unsettled geomagnetic conditions were observed.

Mostly quiet to active geomagnetic conditions are expected. A minor geomagnetic storming episode on 16-17 October remains possible as Earth is still expected to pass through the high speed stream from the eastmost trans-equatorial extension of the northern coronal hole.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 049, na základě 09 stanic.

Solární indexy za 15 Oct 2015

Wolfovo číslo Catania	///
10cm sluneční tok	107
AK Chambon La Forêt	017
AK Wingst	012
Odhadovaný Ap	010
Odhadovaný mezinárodní počet slunečních skvrn	050 - Na základě 16 stanic

Souhrn významných událostí

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

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