Affichage des archives de mercredi, 6 décembre 2017
Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC
Publié: 2017 Dec 06 1231 UTC
Prévisions SIDC
Éruptions solaires
Quiet conditions (<50% probability of C-class flares)
Géomagnétisme
Minor storm expected (A>=30 or K=5)
Moniteur de Flux de Proton
Quiet
| Flux de 10 cm | Ap | |
|---|---|---|
| 06 Dec 2017 | 070 | 018 |
| 07 Dec 2017 | 072 | 024 |
| 08 Dec 2017 | 073 | 014 |
Bulletin
The solar activity remained very quiet. No flare has been recorded in the past 24-hour. One bipolar sunspot (Catania sunspot group 65) has just emerged. Quiet flaring conditions are expected.
No Earth directed Coronal Mass Ejection has been observed. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.
The Earth remained under the high speed solar wind stream (HSS) associated with the Coronal Hole (which has crossed the central meridian on Dec 01). The wind speed has continued to gradually increase from 550 to 630 km/s, and is currently showing a slight declining to 540 km/s. The interplanetary magnetic field magnitude showed a slow decline from 11 nT to the current value of 4 nT, and the Bz component fluctuated between -8 and 6 nT to return to its nominal values between -4 and 4 nT.
Disturbed geomagnetic conditions were observed due to the fast solar wind and the Bz component of the interplanetary magnetic field reaching -8 nT. A minor storm was observed by the local stations at Dourbes (K=5 from 15:00 to 17:00 UT on Dec 05), while NOAA reported Kp between 3 and 4. The high speed stream is expected to persist and new minor geomagnetic storms cannot be excluded, especially if Bz component remains negative for longer periods of time.
Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 08 stations.Indices solaires pour 05 Dec 2017
| Nombre de Wolf, observé par Catania | 000 |
| Flux solaire à 10 cm | 068 |
| AK Chambon La Forêt | 047 |
| AK Wingst | 034 |
| Ap estimé | 034 |
| Nombre international de taches solaires estimé | 000 - 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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