Affichage des archives de samedi, 18 janvier 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Jan 18 1231 UTC

Prévisions SIDC

Éruptions solaires

M-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
18 Jan 2025	220	019
19 Jan 2025	240	007
20 Jan 2025	250	007

Régions solaires actives et éruptions solaires

Solar flaring activity was high over the past 24 hours, with 7 M-class flares identified. The largest flare was a M7.4 flare (SIDC Flare 3308) peaking on January 17 at 13:35 UTC, which was produced by SIDC Sunspot Group 378 (NOAA Active Region 3964). A total of 8 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Group 378 (NOAA Active Region 3964) (Beta-Gamma) was responsible for the majority of the flaring activity over the past 24 hours.

Éjection de masse coronale

No new Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images.

Vent solaire

Slightly enhanced solar wind conditions are recorded over the past 24 hours, with solar wind speed from 530 to around 610 km/s. The interplanetary magnetic field was initially 10nT and gradually decreased to 4 nT in the last 24 hours and the Bz reached a minimum value of -4 nT. Further enhancements of the solar wind speed are possible in the next 24h, due to the influence of the high-speed stream (HSS) of the coronal hole.

Géomagnétisme

Geomagnetic conditions were globally and locally quiet to active (Kp 4 and K Bel 4). Active conditions are expected in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux remained below the 10 pfu threshold and is expected to remain so over the next days.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux measured by GOES 16 remained below the 1000 pfu alert threshold, and it is expected to remain below the threshold during the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 154, sur la base de 03 stations.

Indices solaires pour 17 Jan 2025

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	227
AK Chambon La Forêt	///
AK Wingst	024
Ap estimé	021
Nombre international de taches solaires estimé	146 - Basé sur 06 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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