Affichage des archives de jeudi, 21 novembre 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Nov 21 1222 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
21 Nov 2013	140	001
22 Nov 2013	138	001
23 Nov 2013	138	001

Bulletin

NOAA AR 1893 produced a M1.2 flare on November 21, peaking at 1111 UT. Very few information is currently available on this event, but it seems that, besides a weak type III burst no other radio emission is associated with it. Coronagraphic observations are not yet available, but SDO data hint at a CME signature. Owing to the position of AR 1893 on the west limb, a CME, if confirmed, would very likely not be geoeffective. We foresee mostly eruptive conditions for the next 48 hours, with C class flares possible from NOAA ARs 1893, 1897 and 1899. A small sunspot group emerged north of AR 1899, but it is too soon to evaluate its flaring capacity for the forecast period. An extra isolated M flare is not completely excluded from NOAA AR 1893 before it rotates behind the west limb. We expect quiet geomagnetic conditions for the next 48 hours. All CMEs observed in the past 24 hours appear to be non geoeffective, including a partial halo CME, observed by LASCO on Nov. 21 at 0125 UT (backside event).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 051, sur la base de 08 stations.

Indices solaires pour 20 Nov 2013

Nombre de Wolf, observé par Catania	074
Flux solaire à 10 cm	///
AK Chambon La Forêt	005
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	056 - Basé sur 21 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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