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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2025 Feb 17 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
17 Feb 2025	185	007
18 Feb 2025	187	007
19 Feb 2025	189	007

Slunečně aktivní oblasti a vzplanutí

A total of 12 numbered sunspot groups were identified on the disk over the past 24 hours. Solar activity has been low int he last 24 hours, only C-class flaring was observed. The largest flare was a C6.1 flare (SIDC Flare 3629) peaking on February 16 at 18:38 UTC, which was produced by SIDC Sunspot Group 408 (NOAA Active Region 3998). Solar flaring activity is expected to be low over the next 24 hours, with C-class flares expected and a chance for M-class flares.

Vyhazování koronální hmoty

No Earth directed CMEs were observed in the last 24 hours.

Koronální díra

SIDC Coronal Hole 91 (high-latitude coronal hole with a positive polarity) first reached the central meridian on February 16 and is now positioned on the western side of the Sun. This CH is located at high northern latitudes, so its solar wind will probably not affect the Earth.

Solární bouře

The solar wind parameters at the Earth shows that the high speed stream is passing, and the solar wind is returning to slow solar wind conditions. Current solar wind speed is at 500 km/s with an interplanetary magnetic field around 5 nT. A gradual transition to slow solar wind conditions is expected for the next 24 hours.

Geomagnetismus

Geomagnetic conditions reached active levels with Kp up to 4 between 21:00 UTC on 16 February and 00:00 UTC the next day. Mostly quiet to unsettled conditions can be expected or 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-10 MeV GOES 16 and 18 proton flux has been above the threshold in the last 24 hours, but it is currently below it. It is expected to rise above the threshold in the next 24 hours. The 24-hour electron fluence is currently at normal levels and is expected to remain so in the next 24 hours.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 189, na základě 14 stanic.

Solární indexy za 16 Feb 2025

Wolfovo číslo Catania	///
10cm sluneční tok	185
AK Chambon La Forêt	029
AK Wingst	022
Odhadovaný Ap	022
Odhadovaný mezinárodní počet slunečních skvrn	185 - Na základě 16 stanic

Souhrn významných událostí

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

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