Affichage des archives de mercredi, 16 septembre 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Sep 16 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
16 Sep 2015	106	012
17 Sep 2015	108	015
18 Sep 2015	108	026

Bulletin

NOAA 2415, currently the most complex sunspot region on the solar disk, produced the strongest flare of the period (C3.0 flare peaking at 02:24UT). The other 4 regions were mostly quiet, with NOAA 2414 producing a single C1 flare. No earth-directed coronal mass ejections have been observed.

More C-class flares are expected, with a small chance on an M-class flare from NOAA 2415.

Solar wind speed gradually declined from values near 520 km/s to its current 470 km/s. Bz oscillated between -6 and +6 nT, with the interplanetary magnetic field pointing away from the Sun. Quiet to unsettled conditions were observed, with a single active episode at Dourbes (15:00UT). The trailing transequatorial extension of a wide northern coronal hole is transiting the central meridian.

Quiet to unsettled geomagnetic conditions are expected, with a chance on an active episode. Minor geomagnetic storming is expected on 18 and 19 September.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 083, sur la base de 08 stations.

Indices solaires pour 15 Sep 2015

Nombre de Wolf, observé par Catania	073
Flux solaire à 10 cm	101
AK Chambon La Forêt	///
AK Wingst	018
Ap estimé	024
Nombre international de taches solaires estimé	066 - Basé sur 23 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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