Affichage des archives de vendredi, 9 août 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Aug 09 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
09 Aug 2019	068	004
10 Aug 2019	068	007
11 Aug 2019	067	009

Bulletin

Solar activity was at very low levels. The Sun was spotless. No obvious 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 intensified at the beginning of the period, with solar wind speeds up to around 570 km/s (ACE). Wind speed values continued to range between 500 and 550 km/s, gradually decreasing until about 07UT when they started varying between mostly 470 and 510 km/s. Bz varied between -6 and +5 nT. The interplanetary magnetic field (phi angle) was predominately directed away from the Sun (positive sector).

Quiet to unsettled geomagnetic conditions were observed. Mostly quiet conditions are expected. Late on 10 or on 11 August, solar wind stream effects from an irregular shaped negative polarity coronal hole may result in unsettled geomagnetic conditions, with a small chance on an active episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 20 stations.

Indices solaires pour 08 Aug 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	069
AK Chambon La Forêt	010
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 28 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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