Affichage des archives de mardi, 15 septembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Sep 15 1230 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
15 Sep 2015	101	016
16 Sep 2015	104	020
17 Sep 2015	106	018

Bulletin

On 14 September around 17:00UT, a small bipolar region gradually emerged near and in front of NOAA 2415's leading portion. The magnetic interaction resulted in a series of low-level C-class flares, the strongest being a C1.3 flare peaking at 05:19UT. The other 3 sunspot regions were quiet. No earth-directed coronal mass ejections were observed.

More, mostly low-level, C-class flaring is expected, with a small chance on an M-class flare from NOAA 2415.

Solar wind speed varied between 450 and 550 km/s during the period. Bz undulated between -8 and +6 nT, with the interplanetary magnetic field pointing away from the Sun. Quiet to active conditions were observed, with a single minor storming episode during the afternoon of 14 September. The trailing transequatorial extension of a wide northern coronal hole is about to start its transit over the central meridian.

Mostly active geomagnetic conditions are expected over the next few days, with another episode of minor storming not excluded. Minor to moderate geomagnetic storming is expected on 18 and 19 September.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 063, sur la base de 15 stations.

Indices solaires pour 14 Sep 2015

Nombre de Wolf, observé par Catania	068
Flux solaire à 10 cm	097
AK Chambon La Forêt	039
AK Wingst	020
Ap estimé	021
Nombre international de taches solaires estimé	052 - Basé sur 26 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

<< Aller à l'aperçu quotidien