Affichage des archives de jeudi, 25 mai 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 May 25 1341 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
25 May 2017	074	001
26 May 2017	073	008
27 May 2017	074	016

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. NOAA Active Region (AR) 2660 has been most active, producing two B-class flares. No Earth directed Coronal Mass Ejections (CMEs) have been detected in coronagraph observations. 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 small chance for C-class flares. Solar wind speed decreased from about 475 km/s to values around 370 km/s. The total interplanetary magnetic field (IMF) strength, as recorded by the DSCOVR satellite, was around 3.5 nT. Bz fluctuated between -2 and +3 nT. Geomagnetic conditions (K Dourbes between 0 and 3; NOAA Kp between 0 and 1) were ranged from quiet to unsettled level in the past 24 hours. Solar wind speed is expected to decrease even more today. In response geomagnetic conditions are likely to experience mostly quiet to unsettled conditions today (25-May-2017 April) and tomorrow (26-May-2017). Active conditions with a small chance for minor geomagnetic storm are possible on the day three (27-May-2017) due to possible arrival of 23-May 2017 coronal mass ejection.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 027, sur la base de 24 stations.

Indices solaires pour 24 May 2017

Nombre de Wolf, observé par Catania	035
Flux solaire à 10 cm	078
AK Chambon La Forêt	008
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	024 - Basé sur 31 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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