Affichage des archives de dimanche, 11 août 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Aug 11 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
11 Aug 2019	067	009
12 Aug 2019	067	010
13 Aug 2019	067	006

Bulletin

Solar activity was at very low levels. The Sun was spotless. No earth-directed coronal mass ejections (CME) were observed during the period. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Solar wind speed decreased from values near 500 km/s to around 430 km/s (ACE) by 07UT. Bz varied between -4 and +3 nT. The interplanetary magnetic field (phi angle) was predominately oriented away from the Sun (positive sector). From 09:03UT until about 11:30UT, the phi angle was directed towards the Sun. This period was associated with slightly increased wind speeds between 450 and 480 km/s, and Bz values nearly continuously near -4nT.

Quiet to unsettled geomagnetic conditions were observed. The wind stream from an irregular shaped negative polarity coronal hole is expected to arrive on 11 August, which may result in mostly unsettled geomagnetic conditions continuing into 12 August, with an isolated active episode not excluded.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 17 stations.

Indices solaires pour 10 Aug 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	067
AK Chambon La Forêt	013
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	000 - Basé sur 26 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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