Vaata neljapäev, 21 detsember 2023 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2023 Dec 21 1256 UTC

SIDC ennustus

Päikesepursked ehk loited

M-class flares expected (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

	10 cm vool	Ap
21 Dec 2023	205	006
22 Dec 2023	205	018
23 Dec 2023	204	022

Päikese aktiivsed piirkonnad ja pursked

The solar flaring activity was at moderate level during the last 24 hours, with several C-class flares and a M-class flare. The strongest flare was GOES M4.2 flare from NOAA AR 3519 which peaked at 05:38 UTC on Dec 21. During the flare, the source region (AR 3519) of the flare had beta configuration of its photospheric magnetic field. The solar flaring activity is expected to be at low to moderate levels over the next 24 hours with few C-class flares, possibly M-class flares and a low chance for isolated X-class flares.

Krooniaine massiline väljavool

No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph observations during last 24 hour.

Krooniauk

A negative polarity coronal hole crossed the central meridian on Dec 20 and a high-speed stream from this coronal hole may arrive to Earth from December 22.

Päikesetuul

Solar wind conditions have transitioned from fast to slow solar wind. The solar wind speed ranged between 350 km/s and 490 km/s. The North- South component (Bz) ranged between -4 and 3 nT. The interplanetary magnetic field ranged from 1 nT to 5 nT. Slow solar wind conditions are expected to continue over the next 24 hours unless the high speed streams from the negative polarity coronal hole, which started to cross the central meridian on Dec 18, impact the Earth.

Geomagnetism

Geomagnetic conditions were globally and locally at quiet to unsettled conditions (NOAA Kp and K BEL 1 to 3) over the past 24 hours. It is expected to remain so unless the high speed streams from the negative polarity coronal hole, which started to cross the central meridian on Dec 18, impact the Earth.

Prootoni voo tasemed

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

Elektronivoog geostatsionaarsel orbiidil

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was just below the threshold level in the last 24 hours. It increased probably due to enhanced solar wind conditions but remained just below the 1000 pfu alert threshold level. It may increase even further and cross the threshold during the next 24 hours. The 24h electron fluence was at normal level and is expected to remain so.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 147, põhineb 03 jaamadel.

Päikese indeksid 20 Dec 2023

Catania Wolfi number	231
10cm päikesevoog	195
AK Chambon La Forêt	014
AK Wingst	011
Hinnanguline Ap	012
Hinnanguline rahvusvaheline päikeselaikude arv	160 - Põhineb 14 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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