Affichage des archives de dimanche, 17 février 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Feb 17 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
17 Feb 2019	071	002
18 Feb 2019	072	004
19 Feb 2019	072	009

Bulletin

The solar activity has been quiet over the past 24 hours, with the X-ray flux remaining below B-class level. The large plage region is still present in the north-east quadrant of the solar disk with a filament observed across it. Quiet conditions are expected to continue over the next 24 hours.

No Earth directed Coronal Mass Ejections (CMEs) have been detected in coronagraph images. 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 has continued to return to nominal values, decreasing from approximately 390 to 320 km/s. The total magnetic field strength fluctuated around 4 nT, while the Bz component fluctuated between -4 and 2.5 nT. The phi angle was negative at the start of the period but changed to become predominantly positive at 14:00 UT. The ambient background solar wind conditions are expected to continue over the next 24 hours.

The geomagnetic conditions were quiet to unsettled over the last 24 hours, with the Kp (NOAA) and the local K (Dourbes) indices ranging between 0-2 and 0-3, respectively. The geomagnetic conditions are expected to continue to be quiet over the next 24 hours, with the possibility for unsettled conditions from the 19th due to the influence of the positive polarity coronal hole, which passed the central meridian on the 16th of February.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 24 stations.

Indices solaires pour 16 Feb 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	006
AK Wingst	003
Ap estimé	003
Nombre international de taches solaires estimé	000 - 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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