Affichage des archives de samedi, 16 août 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Aug 16 1320 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
16 Aug 2014	116	006
17 Aug 2014	119	007
18 Aug 2014	119	007

Bulletin

Four C flares were registered during the past 24 hours. The brightest one was a C1.5 flare released by NOAA AR 2139 with peak time 21:54 UT on August 15. In the next 48 hours, eruptive conditions (C flaring) are expected, with a slight chance for M flares (30%), especially from beta-gamma regions NOAA AR 2144 and 2139. A large filament eruption took place near the central meridian around 16:54 UT on August 15, and an associated partial halo CME was observed in LASCO C2 starting around 18:00 UT. Preliminary analysis suggests an arrival time at Earth in the second half of August 19. Over the past 24 hours, solar wind speed as observed by ACE decreased from about 360 to 280 km/s, while the magnitude of the Interplanetary Magnetic Field (IMF) varied between 2 and 4 nT. Over the past 24 hours, geomagnetic conditions were quiet (K Dourbes between 0 and 3; NOAA Kp between 0 and 2). Quiet geomagnetic levels (K Dourbes < 4) are expected on August 16, 17 and 178.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 076, sur la base de 18 stations.

Indices solaires pour 15 Aug 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	113
AK Chambon La Forêt	007
AK Wingst	006
Ap estimé	004
Nombre international de taches solaires estimé	074 - Basé sur 27 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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