Affichage des archives de vendredi, 26 mai 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 May 26 1313 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 May 2017	076	001
27 May 2017	077	007
28 May 2017	078	008

Bulletin

Over the past 24 hours solar activity has been low. Four B-class flares have been recorded produced by the decaying NOAA Active Region (AR) 2660 and by the developing Active Region NOAA 2659 (McIntosh Class: Dsi, Mag. Type: Beta). One returning NOAA AR is expected to appear at the east solar limb in the next 24 hours. No earth-directed coronal mass ejections (CME) have been observed. The greater than 2 MeV electron flux measured by GOES reached high levels. Solar protons have remained at background levels. Solar activity is expected to remain low over the next 24 hours with a high chance of B-class flares and some probability of C-class flares.

The variations of the solar wind parameters were weak. Solar wind speed decreased from 370 km/s till 320 km/s during the last 24 hours. The magnitude of the Interplanetary Magnetic Field (Bt) remained below 5 nT. The Bz component fluctuated between between -3 and +3 nT. Geomagnetic conditions have been very quiet in the past 24 hours (K Dourbes between 0 and 2; NOAA Kp between 1 and 2). Geomagnetic activity is expected to continue at low levels today (26-May-2016). Active to minor geomagnetic storm conditions (Kp NOAA between 3 and 4) are possible from tomorrow 27-May-2017 due to the possible arrival of the 23-May-2017 CME.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 026, sur la base de 28 stations.

Indices solaires pour 25 May 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	076
AK Chambon La Forêt	008
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	030 - Basé sur 27 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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