Affichage des archives de samedi, 28 septembre 2024
Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC
Publié: 2024 Sep 28 1232 UTC
Prévisions SIDC
Éruptions solaires
M-class flares expected (probability >=50%)
Géomagnétisme
Quiet (A<20 and K<4)
Moniteur de Flux de Proton
Quiet
| Flux de 10 cm | Ap | |
|---|---|---|
| 28 Sep 2024 | 186 | 007 |
| 29 Sep 2024 | 188 | 016 |
| 30 Sep 2024 | 190 | 010 |
Régions solaires actives et éruptions solaires
Solar flaring activity was low over the past 24 hours. A total of 9 numbered sunspot groups were identified on the disk over the past 24 hours. The largest flare was a C6.3 from SIDC Sunspot Group 249 (NOAA AR 3839), peaking at 15:35 UTC on 27 September. This AR, currently located at S14E63, has a Beta magnetic configuration and was growing over the past 24 hours. Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares likely and a small chance for X-class flares.
Éjection de masse coronale
No Earth directed CMEs were observed in the past 24 hours.
Trous coronaux
SIDC Coronal Hole 65, a small negative polarity coronal hole, crossed central meridian on 26 September, a HSS may be expected at the Earth on 29 September.
Vent solaire
The Earth is inside a slow solar wind stream, with speeds around 320 km/s and an interplanetary magnetic field of about 8 nT. Similar conditions can be expected for the next 24 hours, a mild high speed solar wind stream can be expected after that.
Géomagnétisme
The geomagnetic conditions over the past 24 hours were quiet both locally and globally (K_Bel and Kp up to 2). Similar conditions can be expected for the next 24 hours.
Niveaux de flux de protons
Over the past 24 hours, the greater than 10 MeV GOES proton flux has been at nominal levels, and is expected to remain so over the next 24 hours.
Flux d'électrons sur l'orbite géostationnaire
The greater than 2 MeV electron flux as measured by GOES 16 and 18 was below the 1000 pfu threshold in the past 24 hours. Similar conditions can be expected for 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 : 158, sur la base de 12 stations.
Indices solaires pour 27 Sep 2024
| Nombre de Wolf, observé par Catania | 183 |
| Flux solaire à 10 cm | 186 |
| AK Chambon La Forêt | 008 |
| AK Wingst | 006 |
| Ap estimé | 006 |
| Nombre international de taches solaires estimé | 163 - Basé sur 17 stations |
Résumé des événements marquants
| Jour | Commencer | Max | Fin | Loc | Force | OP | 10cm | Catania/NOAA | Types de sursaut radio | |
|---|---|---|---|---|---|---|---|---|---|---|
| Aucun | ||||||||||
Données fournies par le Solar Influences Data analysis Center© - SIDC - Traité par SpaceWeatherLive
Toutes les heures sont indiquées en UTC
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| 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 |
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|---|---|
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