Affichage des archives de dimanche, 3 avril 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Apr 03 1230 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
03 Apr 2016	080	014
04 Apr 2016	081	018
05 Apr 2016	082	018

Bulletin

Solar flaring activity was restricted to a single B2 event at the start of the period. NOAA 2526 remained quiet. No earth-directed coronal mass ejections (CMEs) were observed. The x-ray background flux was steady at the A7 level.

Quiet conditions are expected to continue.

The Kp index reached minor storming levels on 2 April during the 15-18UT interval, and moderate geomagnetic storming during the 21-24UT interval. K Dourbes was resp. at minor storming and active conditions. This geomagnetic activity was the result of the arrival of a co-rotating interaction region and associated wind stream from a negative coronal hole.

Solar wind speeds continued to gradually increase from about 330 km/s at 08:00UT to about 530 km/s around 21:30UT. A sharp drop in wind density from 40 to 7 particles per cm3 occurred at 14:05UT, coinciding with a final shift in the direction of the interplanetary magnetic field from away to towards the Sun. It was followed about an hour later by a strong dive of Bz towards negative values around -14 nT, with sustained but gradually weakening negative values over the subsequent 7 hours.

Currently, wind speed is declining with values near 400 km/s, and Bz varying between -5 and +5 nT. Mostly unsettled to active geomagnetic conditions are expected for the rest of the day (3 April), a minor storming episode not excluded. The wind stream from an elongated negative coronal hole between latitudes +10 and +30 degrees is still expected to influence the earth environment starting from 4 April onwards.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 013, sur la base de 18 stations.

Indices solaires pour 02 Apr 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	082
AK Chambon La Forêt	041
AK Wingst	023
Ap estimé	019
Nombre international de taches solaires estimé	012 - 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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