Affichage des archives de mardi, 16 avril 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Apr 16 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
16 Apr 2019	075	007
17 Apr 2019	074	006
18 Apr 2019	074	005

Bulletin

Solar activity was at very low levels. NOAA 2738 produced a B3 flare peaking at 19:31UT. No earth-directed coronal mass ejections were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values. A weak extension from the positive polarity northern polar coronal hole (CH) is transiting the central meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed continued its gradual increase from its initial 340 km/s to reach 400 km/s by the end of the period. Bz varied between -6 and 6 nT, with a negative stretch from 15 till 20UT. The interplanetary magnetic field was mostly directed towards the Sun (negative sector). Quiet to unsettled geomagnetic conditions were observed.

Quiet to unsettled geomagnetic conditions are expected to continue.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 23 stations.

Indices solaires pour 15 Apr 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	075
AK Chambon La Forêt	014
AK Wingst	///
Ap estimé	009
Nombre international de taches solaires estimé	013 - Basé sur 33 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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