Affichage des archives de mardi, 28 novembre 2017
Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC
Publié: 2017 Nov 28 1230 UTC
Prévisions SIDC
Éruptions solaires
Quiet conditions (<50% probability of C-class flares)
Géomagnétisme
Active conditions expected (A>=20 or K=4)
Moniteur de Flux de Proton
Quiet
| Flux de 10 cm | Ap | |
|---|---|---|
| 28 Nov 2017 | 074 | 009 |
| 29 Nov 2017 | 073 | 013 |
| 30 Nov 2017 | 073 | 005 |
Bulletin
Solar activity was at very low levels. NOAA 2689 is the only visible sunspot group and is gradually decaying. The prominent 40 degrees long filament in the SW quadrant was quiet. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.
Quiet flaring conditions are expected, with a slight chance on an isolated C-class flare.
Earth was under the influence of the wind stream from the extensions of the negative polar coronal hole (CH). Solar wind speed peaked near 490 km/s around 14UT and again around 01UT (DSCOVR), ending the period with values around 440 km/s (ACE). Bz was mostly positive, except for a period from 23UT till 01UT with sustained negative values around -8 nT. The interplanetary magnetic field was mostly directed towards the Sun.
The geomagnetic field was quiet throughout the period, except for the 00-03UT interval when Kp was at active levels. Quiet to unsettled conditions are expected as Earth remains under the influence from the weak CH wind stream. A glancing blow from the 25 November CME late on 28 or on 29 November may add to the geomagnetic unrest and result in unsettled to active conditions.
Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 015, sur la base de 19 stations.Indices solaires pour 27 Nov 2017
| Nombre de Wolf, observé par Catania | 015 |
| Flux solaire à 10 cm | 074 |
| AK Chambon La Forêt | 013 |
| AK Wingst | 006 |
| Ap estimé | 004 |
| Nombre international de taches solaires estimé | 017 - Basé sur 13 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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