Affichage des archives de vendredi, 13 avril 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Apr 13 1230 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
13 Apr 2018	069	011
14 Apr 2018	070	004
15 Apr 2018	071	004

Bulletin

The solar activity has been quiet over the past 24 hours. An active region has recently emerged on the North-East quadrant (NOAA 2704, Mcintosh class: Bxo, Mag. type: Beta), but no significant flare has been recorded. The flaring conditions are expected to remain mostly quiet for the next 24-hour period with a small chance of C-class flare.

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 remains affected by the solar wind connected to the equatorial coronal hole (which has crossed the central meridian on April 05). The solar wind speed has continuously decreased from around 520 to 450 km/s over the past 24 hours. The total magnetic field strength remained below 5 nT, and the Bz component was fluctuating between -4.5 and +4.6 nT being mainly negative. The influence of the solar wind associated with the coronal hole is expected to decay, and the solar wind conditions are expected to return slowly towards an ambient-background within the 24-48 hours

Geomagnetic conditions have been unsettled to active over the past 24 hours: Kp index (NOAA) and local K (Dourbs) were observed 4 on April 14 around 01:00-03:00 UT. Due to the slow decay of the solar wind speed, quiet to unsettled geomagnetic conditions are expected.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 015, sur la base de 11 stations.

Indices solaires pour 12 Apr 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	///
AK Chambon La Forêt	020
AK Wingst	012
Ap estimé	011
Nombre international de taches solaires estimé	007 - Basé sur 18 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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