Affichage des archives de lundi, 10 avril 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Apr 10 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
10 Apr 2017	073	006
11 Apr 2017	072	011
12 Apr 2017	071	007

Bulletin

Solar activity was at very low levels during the period. Low-level B-class flaring was observed from NOAA 2648 (B1.8) and from a new active region at the east limb NOAA 2650 (B2.7, B1.1, B1.3). 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 chance on an isolated C-class flare.

Solar wind speed declined from about 470 km/s to values around 420 km/s. Bz fluctuated between -3.5 and +7 nT, being positive after 16UT. The interplanetary magnetic field was initially directed away from the Sun, but changed to a mostly toward the Sun direction after 02UT.

Solar wind parameters are expected to decline further today. A weak connection to an isolated, positive polarity coronal hole is expected to enhance the solar wind environment from tomorrow.

The geomagnetic field was at active to quiet levels (Kp NOAA index: 3-1). Local geomagnetic data were missing for the period. Geomagnetic conditions are expected to be quiet to unsettled.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 014, sur la base de 21 stations.

Indices solaires pour 09 Apr 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	074
AK Chambon La Forêt	015
AK Wingst	014
Ap estimé	015
Nombre international de taches solaires estimé	000 - 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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