Affichage des archives de mercredi, 12 mars 2025
Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC
Publié: 2025 Mar 12 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 | |
|---|---|---|
| 12 Mar 2025 | 165 | 013 |
| 13 Mar 2025 | 170 | 014 |
| 14 Mar 2025 | 180 | 007 |
Régions solaires actives et éruptions solaires
Solar flaring activity was moderate over the past 24 hours, with 1 M-class flare identified. The largest flare was a M1.1 flare (SIDC Flare 3800) peaking on March 11 at 13:04 UTC, which was produced by SIDC Sunspot Group 431 (NOAA Active Region 4024). A total of 11 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Group 428 (NOAA Active Region 4019) is the most complex active region ( Beta-Delta).
Éjection de masse coronale
No new Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images.
Vent solaire
The solar wind at the Earth is slow, with speeds around 460 km/s and interplanetary magnetic field slightly increased from 6 to 12 nT with the Bz reaching a minimum value of -10 nT. In the next 24h, the solar wind speed may increase due to the influence of the high-speed streams associated with the coronal holes (which reached the central meridian in March 10).
Géomagnétisme
Geomagnetic conditions reached active levels (Kp 4- and K Bel 4) early on March 12. Geomagnetic conditions may reach again active levels late on March 12, due to a high-speed stream arrival.
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 on March 11 and is expected to remain so in the upcoming days. The 24h electron fluence was at nominal level and is expected to remain so in the next days.
Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 156, sur la base de 11 stations.
Indices solaires pour 11 Mar 2025
| Nombre de Wolf, observé par Catania | /// |
| Flux solaire à 10 cm | 161 |
| AK Chambon La Forêt | 022 |
| AK Wingst | 009 |
| Ap estimé | 011 |
| Nombre international de taches solaires estimé | 141 - Basé sur 14 stations |
Résumé des événements marquants
| Jour | Commencer | Max | Fin | Loc | Force | OP | 10cm | Catania/NOAA | Types de sursaut radio |
|---|---|---|---|---|---|---|---|---|---|
| 11 | 1303 | 1304 | 1306 | ---- | M1.1 | --/4024 | III/2 | ||
| 11 | 1820 | 1830 | 1835 | ---- | SF | --/4024 |
Données fournies par le Solar Influences Data analysis Center© - SIDC - Traité par SpaceWeatherLive
Toutes les heures sont indiquées en UTC
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La Météo Spatiale en faits
| Dernière classe X | 08/12/2025 | X1.1 |
| Dernière classe M | 31/12/2025 | M7.11 |
| Dernier orage géomagnétique | 02/01/2026 | Kp5 (G1) |
| Jours sans taches solaires | |
|---|---|
| Dernier jour sans taches solaires | 08/06/2022 |
| Nombre mensuel moyen de taches solaires | |
|---|---|
| décembre 2025 | 124 +32.2 |
| janvier 2026 | 119.3 -4.8 |
| 30 derniers jours | 108.9 +1.7 |