Vaata kolmapäev, 23 aprill 2025 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2025 Apr 23 1231 UTC

SIDC ennustus

Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

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

Päikese aktiivsed piirkonnad ja pursked

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.

Krooniaine massiline väljavool

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

Krooniauk

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

Päikesetuul

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.

Geomagnetism

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.

Prootoni voo tasemed

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.

Elektronivoog geostatsionaarsel orbiidil

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.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 152, põhineb 12 jaamadel.

Päikese indeksid 22 Apr 2025

Catania Wolfi number	///
10cm päikesevoog	163
AK Chambon La Forêt	016
AK Wingst	015
Hinnanguline Ap	015
Hinnanguline rahvusvaheline päikeselaikude arv	174 - Põhineb 32 jaamal

Märkimisväärsete sündmuste kokkuvõte

Andmed on esitanud Päikeseinfektide Andmeanalüüsi Keskus (Solar Influences Data Analysis Center)© - SIDC - Töötleb SpaceWeatherLive

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