Affichage des archives de mardi, 17 février 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Feb 17 1233 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
17 Feb 2015	120	011
18 Feb 2015	125	007
19 Feb 2015	130	007

Bulletin

The solar activity during the past 24 hours was very low with only limited flaring activity at the B-level from NOAA active region (AR) 2282. All regions (AR) NOAA 2282, 2284 and 2285 were relatively stable or showed slight decay. Within the next 48 hours flaring activity is expected to increase to the C-level, with a few returning regions as potential source regions, like the old NOAA region 2268. No Earth-directed CMEs were observed. The interplanetary magnetic field was variable with a magnitude between 10 and 16 nT and a varying Bz component between -12 and 11 nT. The phi angle mostly was negative through the period. The solar wind speed remained mostly at 350 km/s, with more variation from 4 UT on, reaching values up to 440 km/s. Geomagnetic conditions were quiet to unsettled, with a single time slot of active conditions at the local level (K=4, Dourbes). Geomagnetic conditions are expected to remain so, until the arrival of a high speed stream (HSS) from a negative northern coronal hole estimated from the end of 20th of February.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 025, sur la base de 08 stations.

Indices solaires pour 16 Feb 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	118
AK Chambon La Forêt	018
AK Wingst	009
Ap estimé	007
Nombre international de taches solaires estimé	031 - 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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