Affichage des archives de mercredi, 7 août 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Aug 07 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
07 Aug 2019	068	009
08 Aug 2019	067	005
09 Aug 2019	067	004

Bulletin

Solar activity was at very low levels. Small sunspot region NOAA 2747 developed during the period (N06E10; McIntosh class: Axx; MtWilson class: Alpha), but had almost decayed by noon on 7 August. No earth- directed coronal mass ejections (CME) were observed. The greater than 10 MeV proton flux was at nominal values. An irregular shaped negative polarity coronal hole is transiting the central meridian.

Solar activity is expected to remain at very low levels.

The earth environment remained under the influence of the high-speed stream (HSS) of the positive polarity coronal hole. Solar wind speed declined from values near 650 km/s to about 500 km/s by the end of the period (ACE). Bz varied between -4 and + 3 nT. The interplanetary magnetic field (phi angle) was mostly directed away from the Sun (positive sector).

Geomagnetic activity was at quiet to unsettled levels, and is expected to continue under the waning influence of the HSS.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 011, sur la base de 14 stations.

Indices solaires pour 06 Aug 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	018
AK Wingst	013
Ap estimé	012
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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