Affichage des archives de mercredi, 28 juin 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jun 28 1230 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
28 Jun 2017	073	005
29 Jun 2017	072	008
30 Jun 2017	073	006

Bulletin

Solar activity was at very low levels during the period. NOAA 2664 is decaying and lost most sunspots of its northwestern portion. The region produced two low-level B-class flares. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Quiet flaring conditions are expected, with a tiny chance on an isolated C-class flare.

Solar wind speed declined slowly from about 470 to 450 km/s over the period. Bz fluctuated mostly between -2 and +3 nT. The interplanetary magnetic field was mostly directed away from the Sun.

The geomagnetic field was at quiet levels, and is expected to remain so. The particle stream from a small equatorial coronal hole may briefly enhance geomagnetic conditions on 29 or 30 June, with a small chance on an active episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 018, sur la base de 15 stations.

Indices solaires pour 27 Jun 2017

Nombre de Wolf, observé par Catania	020
Flux solaire à 10 cm	074
AK Chambon La Forêt	008
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	020 - 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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