Affichage des archives de mardi, 27 juin 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jun 27 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
27 Jun 2017	074	009
28 Jun 2017	075	006
29 Jun 2017	075	010

Bulletin

Solar activity was at very low levels during the period. NOAA 2664 gained some sunspot area in its northwestern portion, but remained quiet. An active region is rotating over the east limb, but is currently still spotless. 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 small chance on a C-class flare.

Earth is under the waning influence of a coronal hole wind stream. Solar wind speed peaked around 13:00UT with a brief spike of about 610 km/s (DSCOVR). The overall wind speed gradually declined from its initial 570 km/s to around 470 km/s at the end of the period. Bz fluctuated between -3 and +3 nT. The interplanetary magnetic field was mostly directed away from the Sun. A small positive equatorial coronal hole (CH) was at the central meridian on 25 June.

The geomagnetic field was at quiet to unsettled levels, and is expected to remain so. The particle stream from the small CH 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 : 019, sur la base de 16 stations.

Indices solaires pour 26 Jun 2017

Nombre de Wolf, observé par Catania	042
Flux solaire à 10 cm	074
AK Chambon La Forêt	013
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	024 - Basé sur 34 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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