Affichage des archives de mercredi, 13 février 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Feb 13 1230 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
13 Feb 2019	071	015
14 Feb 2019	072	013
15 Feb 2019	072	004

Bulletin

The solar activity has been quiet over the past 24 hours, with the X-ray flux remaining below B-class level. A new small bipolar sunspot group began emerging around midnight in the south-west quadrant of the solar disk. Quiet conditions are expected to continue over the next 24 hours, with a small chance of isolated C-class flares. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10MeV proton flux remained at background levels over the past 24 hours and is expected to remain so.

Over the last 24 hours the solar wind initially fluctuated around 400 km/s before steadily increasing over the past 6 hours to a maximum of 480 km/s. During this increase in solar wind the total magnetic field strength increased to 9.5 nT and the Bz component reached a minimum value -8 nT. Enhanced solar wind conditions are expected to continue over the next 24 hours due to the expected arrival of the high speed stream associated with the extended southern polar coronal hole, which crossed the central meridian on the 10th February.

The geomagnetic conditions were quiet to unsettled for the majority of the 24 hour period, rising to active conditions over the last 3 hours (Kp NOAA reaching 4). The geomagnetic conditions are expected to continue to be unsettled with the possibility for isolated active periods, as the influence solar wind associated with the extended southern polar coronal hole is expected to continue to influence the Earth over the next few days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 12 stations.

Indices solaires pour 12 Feb 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	008
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	000 - Basé sur 25 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

<< Aller à l'aperçu quotidien