Affichage des archives de lundi, 14 septembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Sep 14 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
14 Sep 2015	099	013
15 Sep 2015	101	029
16 Sep 2015	102	018

Bulletin

The three currently visible sunspot groups have been quiet during the last 24 hours. Only NOAA 2415 is showing some magnetic mixing in its leading portion. No significant flaring has been observed since late on 11 September. No earth-directed coronal mass ejections have been observed.

Mostly quiet flaring conditions are expected, with a small chance on a C-class flare.

Solar wind speed declined from its initial 480 km/s to about 400 km/s around 07:00UT this morning, then rising to its current 500 km/s probably in response to the arrival of the high speed stream (HSS) of the northern coronal hole's extension. Since about 18:00UT, Bz has been oscillating between mostly -9 and +7 nT, with the interplanetary magnetic field pointing away from the Sun. Quiet to active geomagnetic conditions were observed. A wide coronal hole (CH) is transiting the central meridian (CM). Its trailing transequatorial extension is expected to start its CM transit on 15 September.

Mostly active geomagnetic conditions are expected over the next few days, with possible episodes of minor storming on 14 and 15 September, and minor to moderate storming on 18 and 19 September.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 052, sur la base de 14 stations.

Indices solaires pour 13 Sep 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	///
AK Chambon La Forêt	020
AK Wingst	014
Ap estimé	013
Nombre international de taches solaires estimé	078 - 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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