Affichage des archives de dimanche, 26 novembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Nov 26 1233 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
26 Nov 2017	075	006
27 Nov 2017	075	008
28 Nov 2017	075	016

Bulletin

Over the past 24 hours solar activity has been quiet. No significant flares have been recorded. All Active Regions (AR) have shown low levels of activity. A small filament eruption occurred near disk centre at around 04:00 UT on 2017-Nov-25, Coronagraph imagery suggests the bulk of the ejection headed to the East of the Sun-Earth line and only a glancing blow, if any, can be expected. If so, this is anticipated to arrive at Earth late on 2017-Nov-28. However, projection effects make it difficult to ascertain an accurate speed. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. The solar wind speed been been decreasing from 400 to 320 km/s over the past 24 hours. The total magnetic field strength has fluctuated between 0 and 5 nT, peaking around 00:00 UT this morning. The Bz component has fluctuated between positive and negative, between -4 and +5 nT. Geomagnetic conditions ranged between Kp index 0-2 (NOAA) and local K index 0-2 (Dourbes) over the past 24 hours. A small transient coronal hole has just passed the central meridian and may enhance solar wind speeds in a couple of days. Geomagnetic conditions are expected to be quiet.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 018, sur la base de 17 stations.

Indices solaires pour 25 Nov 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	074
AK Chambon La Forêt	005
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	016 - Basé sur 16 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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