Affichage des archives de lundi, 25 novembre 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Nov 25 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
25 Nov 2019	070	006
26 Nov 2019	070	008
27 Nov 2019	070	015

Bulletin

Solar activity was at very low levels. The Sun was spotless again. No earth-directed coronal mass ejections (CMEs) have been observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values. A negative polarity coronal hole (CH) in the southern hemisphere has finished its transit of the central meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed declined from initial values around 480 km/s to 410 km/s at the end of the period (ACE), reflecting the weakening wind stream from a positive polarity coronal hole. Bz varied between -4 and + 3 nT. The interplanetary magnetic field (phi angle) was mostly directed away from the Sun (positive sector). Kp and K Dourbes recorded quiet to unsettled geomagnetic conditions.

Geomagnetic activity is expected to remain mostly at quiet to unsettled levels. As the earth environment is expected to become affected by the wind streams from patchy, negative polarity coronal holes during the next few days (26-27 November), an active episode is not excluded.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 20 stations.

Indices solaires pour 24 Nov 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	///
AK Wingst	014
Ap estimé	011
Nombre international de taches solaires estimé	000 - Basé sur 15 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

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