Affichage des archives de dimanche, 16 avril 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Apr 16 1237 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
16 Apr 2017	073	010
17 Apr 2017	072	015
18 Apr 2017	071	007

Bulletin

Solar activity was at very low levels. No flares were observed during the reporting period. No Earth-directed CMEs were observed in available coronagraph imagery. Integral proton flux for protons with energies above 10 MeV remained at background level. Solar activity is expected to grow till B-class flaring level today (April 16) and till C-class flaring level from tomorrow (April 17) due to anticipated return of previously active regions to the visible solar disk.

Solar wind speed decreased from about 350 km/s to values around 315 km/s (05UT, 16 April), but then increased again till 350 km/s. The total interplanetary magnetic field (IMF) strength, as recorded by the DSCOVR satellite, was around 5 nT. Bz fluctuated between -4.5 and +4 nT. Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 1 and 2) were registered in the past 24 hours. Solar wind speed is expected to grow further today due to the arrival of high speed stream from the positive polarity coronal hole. In response geomagnetic conditions are likely to experience mostly quiet to unsettled conditions from late today (16 April) and tomorrow (17 April). Isolated episodes of active geomagnetic conditions are also possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 21 stations.

Indices solaires pour 15 Apr 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	073
AK Chambon La Forêt	008
AK Wingst	010
Ap estimé	008
Nombre international de taches solaires estimé	000 - Basé sur 20 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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