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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2025 Apr 23 1231 UTC

SIDC Předpověď

Sluneční erupce

C-class flares expected, (probability >=50%)

Geomagnetismus

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm tok	Ap
23 Apr 2025	163	007
24 Apr 2025	165	007
25 Apr 2025	167	016

Slunečně aktivní oblasti a vzplanutí

A total of 11 numbered sunspot groups were identified on the disk over the past 24 hours. Only C-class flaring was observed. The largest flare was a C2.6 flare (SIDC Flare 4183) peaking on April 22 at 18:57 UTC, which was produced by SIDC Sunspot Group 473 (NOAA Active Region 4062). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares expected and M-class flares possible.

Vyhazování koronální hmoty

No Earth-directed CMEs were observed in the available coronagraph imagery in the last 24 hours.

Koronální díra

There is a large positive polarity coronal hole (SIDC Coronal Hole 104) covering a large area of the southern hemisphere.

Solární bouře

The solar wind speed at the Earth is returning to low values with a vanishing influence of the high speed solar wind stream from the large positive polarity coronal hole in the southern hemisphere (SIDC Coronal Hole 104). The solar wind speed has decreased to 460 km/s, with an interplanetary magnetic field around 5 nT. We expect slow solar wind conditions for the next 24 hours. After that, we may see again an increase in solar wind speed, due to the irregular shape of the same coronal hole.

Geomagnetismus

Geomagnetic conditions have been quiet to unsettled both locally and at planetary levels (K_Bel and Kp up to 3). Similar conditions can be expected in the next 24 hours.

Úrovně protonového toku

The greater than 10 MeV proton flux was below the threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.

Elektronové toky na geostacionární oběžné dráze

The greater than 2 MeV electron flux measured by GOES 18 and 19 was below the threshold over the past 24 hours. The greater than 2 MeV electron flux is expected to increase over the next 24 hours, due to the influence of the high speed stream. The 24-hour electron fluence is presently at normal levels, it may increase over the next 24 hours.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 152, na základě 12 stanic.

Solární indexy za 22 Apr 2025

Wolfovo číslo Catania	///
10cm sluneční tok	163
AK Chambon La Forêt	016
AK Wingst	015
Odhadovaný Ap	015
Odhadovaný mezinárodní počet slunečních skvrn	174 - Na základě 32 stanic

Souhrn významných událostí

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

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