Affichage des archives de vendredi, 30 juin 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jun 30 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
30 Jun 2017	072	003
01 Jul 2017	071	005
02 Jul 2017	071	008

Bulletin

Solar activity was at very low levels during the period. NOAA 2664 decayed further and was quiet. No earth-directed CMEs were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Quiet flaring conditions are expected.

Solar wind speed gradually declined from 430 km/s to 340 km/s. Bz was relatively stable between -2 and +2 nT. The interplanetary magnetic field was mostly directed away from the Sun. The first of two small negative equatorial coronal holes (CH) is about to start transiting the central meridian.

The geomagnetic field was at quiet to unsettled levels, and is expected to remain so. A glancing blow from the 28 June CME is possible late on 2 or on 3 July, likely followed by the particle stream from the small negative CH. This may result in active geomagnetic conditions, with a chance on a minor storming episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 011, sur la base de 23 stations.

Indices solaires pour 29 Jun 2017

Nombre de Wolf, observé par Catania	014
Flux solaire à 10 cm	072
AK Chambon La Forêt	009
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	013 - Basé sur 21 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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