Affichage des archives de dimanche, 24 décembre 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Dec 24 1258 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
24 Dec 2023	173	013
25 Dec 2023	172	016
26 Dec 2023	172	007

Régions solaires actives et éruptions solaires

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 M2.9 flare from NOAA AR 3529 which peaked at 11:18 UTC on Dec 24. During the flare, the source region (AR 3529) 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.

Éjection de masse coronale

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

Vent solaire

Over the past 24 hours, the solar wind parameters were slightly disturbed with a strong fluctuations of North-South component (Bz). Bz component ranged between -7 and 7 nT. The interplanetary magnetic field ranged from from 1 nT to 9 nT. The solar wind speed increased from 330 km/s to 440 km/s. The fast solar wind originating from the negative polarity coronal hole (CH), possibly connected to the southern polar CH spanning from 30 - 55 S, which reached the central meridian in the morning of Dec 18 may impact the Earth in the coming hours.

Géomagnétisme

Geomagnetic conditions were globally and locally at quiet to unsettled conditions (NOAA Kp 1 to 3) due to the slight disturbances in the solar wind conditions. Unsettled to active geomagnetic conditions are possible in the coming hours due to the expected arrival of the fast solar wind originating from the negative polarity coronal hole (CH) which crossed the central meridian on Dec 20.

Niveaux de flux de protons

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.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was below the threshold level over the past 24 hours and is expected to remain so in the coming 24 hours. The 24h electron fluence is presently at normal level and is expected to remain so for the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 116, sur la base de 06 stations.

Indices solaires pour 23 Dec 2023

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	174
AK Chambon La Forêt	012
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	146 - Basé sur 11 stations

Résumé des événements marquants

Données fournies par le Solar Influences Data analysis Center© - SIDC - Traité par SpaceWeatherLive

Toutes les heures sont indiquées en UTC

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