Affichage des archives de mercredi, 15 janvier 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Jan 15 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
15 Jan 2025	165	012
16 Jan 2025	170	021
17 Jan 2025	175	022

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours with several C-class flares. The largest flare was a C6.3-flare, with peak time 08:56 UTC on Jan 15 2025, from SIDC Sunspot Group 346 NOAA AR 3961 (beta). There are currently 5 numbered active regions on the visible disk. SIDC Sunspot group 342 (NOAA AR 3959) is the most complex AR (beta-gamma). The solar flaring activity is expected to be at low levels over the coming day with C-class flares expected and M-class flares probable.

Éjection de masse coronale

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

Trous coronaux

The large east-west elongated negative polarity equatorial coronal hole (SIDC Coronal Hole 87) is still crossing the central meridian. A high-speed stream from this coronal hole may enhance the solar wind environment near Earth starting on Jan 16.

Vent solaire

Slow solar wind conditions were recorded over the past 24 hours. The solar wind has gradually increased speeds around 520 km/s and is currently again around 420 km/s. The interplanetary magnetic field is stable to 8 nT with the Bz reaching a minimum value of -7 nT. Enhancements of the solar wind speed are expected in the next 24h, due to the potential arrival of the high-speed stream (HSS) associated with the coronal hole, which started to cross the central meridian on 13 Jan 2025.

Géomagnétisme

Geomagnetic conditions were globally unsettled to active (Kp 4) and locally unsettled (K Bel 3). Quiet to active conditions with possible isolated minor geomagnetic storm levels are expected for 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 remained below the 1000 pfu alert threshold, and, even if a slight increase may be observed, 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 : 066, sur la base de 04 stations.

Indices solaires pour 14 Jan 2025

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	166
AK Chambon La Forêt	026
AK Wingst	012
Ap estimé	012
Nombre international de taches solaires estimé	078 - Basé sur 18 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

<< Aller à l'aperçu quotidien