Affichage des archives de mardi, 21 mai 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 May 21 1230 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
21 May 2019	069	007
22 May 2019	068	007
23 May 2019	068	004

Bulletin

Over the past 24 hours solar activity has been low. The visible solar disc was spotless and the X-ray flux remained below B-class level. 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. Solar activity is expected to remain low over the next 24 hours.

The solar wind speed has fluctuated between 355 and 450 km/s over the past 24 hours. The total magnetic field strength fluctuated around 5 nT for much of the period, with a minimum of 0.6 nT and a maximum of 7.1 nT recorded. The Bz component was predominantly positive and ranged between -4.8 and +7.1 nT.

Geomagnetic conditions have been quiet to unsettled over the past 24 hours, with Kp index (NOAA) and local K index (Dourbes) ranging between 1-2 and 1-3, respectively. Quiet to unsettled geomagnetic conditions are expected to continue over the next 24 hours, due to the weak solar wind stream associated with the patchy negative polarity equatorial coronal hole which began to traverse the central meridian on 18 May.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 21 stations.

Indices solaires pour 20 May 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	069
AK Chambon La Forêt	008
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 20 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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