Affichage des archives de mercredi, 13 mai 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 May 13 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Major magstorm expected (A>=50 or K>=6)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
13 May 2015	160	038
14 May 2015	158	038
15 May 2015	156	018

Bulletin

NOAA 2339 is decaying and produced only low-level C-class flares. NOAA 2342 produced the strongest flare of the period, a C3.5 flare peaking at 05:59UT and located in its trailing portion. The flare was associated with a series Type III radio-burst, and a surge was observed in H-alpha. The greater than 10 MeV proton flux is nearly back at nominal levels. No earth-directed coronal mass ejections (CME) were observed over the period.

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

Moderate geomagnetic storming has been observed as the Earth is under the influence of the high speed stream (HSS) of a recurrent coronal hole. Kp reached 6 between 03:00 and 09:00UT, while Dourbes reported a maximum K of 4. Solar wind speed is currently at about 700 km/s, while Bz-values were at -14 nT between 04:00 and 04:30UT.

Further episodes of minor to moderate geomagnetic storming are expected.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 121, sur la base de 20 stations.

Indices solaires pour 12 May 2015

Nombre de Wolf, observé par Catania	216
Flux solaire à 10 cm	163
AK Chambon La Forêt	031
AK Wingst	016
Ap estimé	019
Nombre international de taches solaires estimé	115 - Basé sur 28 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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