Affichage des archives de lundi, 12 août 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Aug 12 1233 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
12 Aug 2019	068	006
13 Aug 2019	067	006
14 Aug 2019	067	004

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.

The solar wind speed decreased from values near 475 km/s to a minimum of 360 km/s around 4 UT (ACE) before gradually increasing again, due to the solar wind stream from the fragmented negative polarity coronal hole which began to traverse the central meridian on 7 August. Bz varied between -4 and +6 nT. The interplanetary magnetic field (phi angle) was predominately oriented away from the Sun (positive sector) until 3 UT when it switched to the negative sector.

Quiet to unsettled geomagnetic conditions were observed. Quiet to unsettled geomagnetic conditions are expected over the next 24 hours due to the ongoing influence of the wind stream associated with the negative polarity coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 22 stations.

Indices solaires pour 11 Aug 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	012
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 27 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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