Affichage des archives de samedi, 16 mai 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 May 16 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
16 May 2015	132	007
17 May 2015	127	016
18 May 2015	122	021

Bulletin

NOAA 2339 and 2342 produced a C2 class flare each. No other flaring events were observed. A large filament in the northeast quadrant erupted shortly before midnight. No obvious x-ray signature was associated with this event. No earth-directed coronal mass ejections (CMEs) have been observed.

Further C-class flaring is expected, with a slight chance on an M-class flare.

Solar wind speed declined further from 530 km/s to its current value of about 430 km/s. Bz varied between -4 and +2 nT. Quiet to unsettled geomagnetic conditions were observed. A recurrent positive polarity coronal hole (CH) has completed its central meridian transit.

The arrival of the 13 May CME and the high speed stream from the aforementioned CH are expected for late 17 or 18 May. This may result in active conditions, with a minor storming episode not excluded. Until then, quiet to unsettled geomagnetic conditions are expected.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 069, sur la base de 07 stations.

Indices solaires pour 15 May 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	137
AK Chambon La Forêt	011
AK Wingst	008
Ap estimé	009
Nombre international de taches solaires estimé	089 - 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

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