Affichage des archives de mardi, 13 janvier 2026

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 Jan 13 1231 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
13 Jan 2026	113	023
14 Jan 2026	114	012
15 Jan 2026	114	007

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours. The largest flare was a C1.9 flare peaking on January 13 at 10:18 UTC, originated from a region from behind the east limb. A total of 3 numbered sunspot groups are currently on the disk, all having alpha or beta magnetic configuration. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

Éjection de masse coronale

No new Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images. The CME detected in LASCO C2 data on JAN 12 2026 05:48 UTC, directed to the north east, is back sided and is not expected to impact Earth.

Vent solaire

Fast solar wind conditions were recorded over the past 24 hours. The solar wind velocity varied between 520 to 590 km/s. The interplanetary magnetic field was around 8nT, with the Bz reaching a minimum value of -6 nT. Solar wind conditions are expected to remain elevated due to the continuation of the high-speed streams from negative polarity coronal holes (SIDC Coronal Hole 137 and SIDC Coronal Hole 142).

Géomagnétisme

Geomagnetic conditions reached active levels globally and locally (Kp 4, K bel 4) between Jan 12 21:00 UTC and Jan 13 03:00 UTC. Mostly unsettled to active geomagnetic conditions are expected over the next day due to the ongoing high speed stream.

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 was above the 1000 pfu threshold for the past 24 hours and is expected to remain so in the upcoming days. The 24h electron fluence was at moderate level and is expected to remain so in the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 048, sur la base de 06 stations.

Indices solaires pour 12 Jan 2026

Nombre de Wolf, observé par Catania	044
Flux solaire à 10 cm	113
AK Chambon La Forêt	032
AK Wingst	021
Ap estimé	023
Nombre international de taches solaires estimé	056 - Basé sur 12 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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