Affichage des archives de mercredi, 26 février 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Feb 26 1319 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Proton event in progress (>10 MeV)

	Flux de 10 cm	Ap
26 Feb 2014	176	007
27 Feb 2014	178	028
28 Feb 2014	178	025

Bulletin

Solar activity has calmed down since the X-class firework of yesterday. Flaring activity in the past 24 hours has been at the C5 level in active regions NOAA1986-Cat48 and NOAA1989-Cat50. For the first region, the activity corresponds to a (recurrently) activating filament which we expect to erupt at some stage. Major (M or X class flaring) flaring potential remains in various active regions, in particular NOAA1982-46, NOAA1987-Cat54 and NOAA1990-Cat52. The CME associated with the X4.9 flare of Feb 25 00:49 expanded to a full halo CME. Propagation speeds above 1500 km/s were measured. Culgoora Observatory observed type II radio bursts with speeds of 2000 km/s and 700 km/s. As this CME was not completely Earth-directed, we expect that only a glancing blow of the shock will arrive at the Earth, early Feb 27. Soon thereafter (Feb 28 late onwards) we also expect the influence of the fast wind stream from a small coronal hole that crossed central meridian mid Feb 24. As a consequence, we expect episodes of active geomagnetic conditions from early Feb 27 onwards for about 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 141, sur la base de 09 stations.

Indices solaires pour 25 Feb 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	174
AK Chambon La Forêt	010
AK Wingst	003
Ap estimé	004
Nombre international de taches solaires estimé	125 - Basé sur 15 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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