Affichage des archives de samedi, 2 avril 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Apr 02 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
02 Apr 2016	081	015
03 Apr 2016	080	034
04 Apr 2016	080	021

Bulletin

No solar flares were observed over the last 24 hours. Two small sunspots developed during the period, but were gone by about 09UT. NOAA 2526 remained quiet. Filament eruptions were observed on 1 April between 12-14UT (southwest limb) and 16-17UT (south of NOAA 2526), but no earth- directed coronal mass ejections (CMEs) were observed. The x-ray background flux has been below the B1 level since noon of 30 March.

Quiet conditions are expected to continue.

Solar wind speed initially decreased further from about 400 km/s to values near 330 km/s. Around 08UT, a gradual increase set in to speeds near 360 km/s by the end of the period, coinciding with a gradual increase in wind density. Bz varied between -3 and +4 nT. The interplanetary magnetic field was mostly directed away from the Sun. Geomagnetic conditions were quiet. A somewhat elongated negative coronal hole between latitudes +10 and +30 degrees has transited the central meridian and may start influencing the earth environment from 4 April onwards.

Mostly quiet to unsettled geomagnetic conditions are expected until the arrival later today or tomorrow (3 April) of a sector boundary and the co- rotating interaction region ahead of the wind stream from the small negative equatorial coronal hole. This may result in minor geomagnetic storming on 2 and 3 April, with a small chance on moderate storming.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 13 stations.

Indices solaires pour 01 Apr 2016

Nombre de Wolf, observé par Catania	023
Flux solaire à 10 cm	082
AK Chambon La Forêt	///
AK Wingst	003
Ap estimé	003
Nombre international de taches solaires estimé	013 - Basé sur 25 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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