Affichage des archives de samedi, 18 avril 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Apr 18 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
18 Apr 2015	152	010
19 Apr 2015	155	010
20 Apr 2015	156	006

Bulletin

Only few low C-class flares were reported in the past 24 hours, and the strongest one was C1.2 flare (peaked at 18:01 UT) on April 17. The flare originated from the Catania sunspot group 32 (NOAA AR 2324). We expect C-class flares and possibly, but not very probably an isolated M-class flare. No Earth directed CMEs were observed during last 24 hours. The Earth is still inside a fast solar wind, although the wind speed is continuously decreasing and it is at the moment 550 km/s. The interplanetary magnetic field magnitude is stable amounting about 5nT. The Bz component of the interplanetary magnetic field is fluctuating between 3 and -5nT. The fast flow from the small low latitude coronal hole at the southern solar hemisphere (between S10 and S30) which crossed central meridian on April 17 might possibly, although not very probable, arrive at the Earth on April 20. The geomagnetic conditions are presently quiet, and we expect quiet to unsettled geomagnetic conditions in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 121, sur la base de 13 stations.

Indices solaires pour 17 Apr 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	150
AK Chambon La Forêt	019
AK Wingst	021
Ap estimé	022
Nombre international de taches solaires estimé	090 - Basé sur 19 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