Affichage des archives de vendredi, 23 décembre 2022

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2022 Dec 23 1259 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
23 Dec 2022	131	016
24 Dec 2022	131	015
25 Dec 2022	131	008

Bulletin

The solar flaring activity was at low levels with several small C-class flares. The flaring activity over the next 24 hours is expected to remain mostly at low levels, with C-class flares expected and a very small possibility for M-class flares.

Several coronal mass ejections and flows were observed in the currently available SOHO/LASCO coronagraph imagery and automatically detected by the Cactus tool over the past 24 hours. However, no clear Earth-directed coronal mass ejections were identified.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours and is expected to remain so in the next 24 hours. The greater than 2 MeV electron flux was below the 1000 pfu threshold over the past 24 hours and is expected to remain below the 1000 pfu threshold over the next 24 hours. The electron fluence was at normal to low levels and is expected to stay at normal levels over the next 24 hours.

The solar wind parameters are enhanced due to the arrival of the high-speed stream associated to the equatorial coronal holes (positive polarity) reaching to the central meridian of the Sun on December 20. The solar wind speed reached values of 545 km/s, the total interplanetary magnetic field remained slightly enhanced and reached values up to 10.0 nT with the southward interplanetary magnetic component, Bz, ranging between -9.7 nT and 8.8 nT.

During the last 24 hours, the geomagnetic conditions were active (NOAA- Kp=2-4, and K-BEL=1-4) in response to the enhanced solar wind condition. Geomagnetic conditions are expected to remain unsettled with periods of active conditions in the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 085, sur la base de 06 stations.

Indices solaires pour 22 Dec 2022

Nombre de Wolf, observé par Catania	130
Flux solaire à 10 cm	131
AK Chambon La Forêt	024
AK Wingst	015
Ap estimé	014
Nombre international de taches solaires estimé	102 - Basé sur 15 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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