Affichage des archives de vendredi, 13 mars 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Mar 13 1247 UTC

Prévisions SIDC

Éruptions solaires

Active (M-class flares expected, probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
13 Mar 2015	124	009
14 Mar 2015	122	010
15 Mar 2015	120	011

Bulletin

Over the past 24 hours there were several C-class flares and 4 M-class flares which were produced by NOAA AR (Active Region) 2297, which is currently located at S20, and is classified as a Beta-Gamma-Delta region under the Mount Wilson magnetic classification system. The largest flares recorded over the past 24 hours, all produced by AR 2297, were an M4.2 flare on 2015-Mar-12 peaking at 14:08UT, an M2.7 flare on 2015-Mar-12 peaking at 21:51UT, an M1.2 flare on 2015-Mar-13 peaking at 04:01UT and an M1.8 flare on 2015-Mar-13 peaking at 06:07UT. AR 2297 has shown little magnetic evolution with a small amount of flux emergence, which may lead to future eruptions. AR 2299 rotated into view and exhibits a small amount of activity. AR 2298 has shown little activity. There were no discernible Earth directed CMEs over the past 24 hours. There is a large filament located between S15W90 and S50E20, however this has remained, and appears, stable. The solar wind speed has remained roughly constant over the past 24 hours around 425 km/s. The total magnetic field has slightly increased from 5 nT to 7 nT, and the Bz component has remained mainly positive over the past 24 hours. The Bz has ranged between +6 and -9 nT. Geomagnetic conditions ranged between Kp index 0-3 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours. A transient coronal hole is currently located at S05W50, this may produce enhanced solar wind speeds. AR 2297 and AR 2299 produced several small CMEs over the past 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 058, sur la base de 19 stations.

Indices solaires pour 12 Mar 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	127
AK Chambon La Forêt	011
AK Wingst	007
Ap estimé	008
Nombre international de taches solaires estimé	048 - Basé sur 24 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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