Affichage des archives de vendredi, 30 novembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Nov 30 1245 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
30 Nov 2018	068	005
01 Dec 2018	067	017
02 Dec 2018	066	012

Bulletin

There were no B-class or C-class flares reported since November 27 when a low B-class flare was observed. There are presently no active regions observed on the visible side of the solar disc, and therefore we do not expect any flaring activity in the coming days. Rather large prominence, situated at the southern solar hemisphere, erupted this morning at about 03:30 UT. As only two coronagraph images are presently available it is not yet possible to accurately estimate the speed of the associated CME. The prominence was situated rather close to the southern coronal hole and the associated CME is probably directed southward from the Sun-Earth line, and it is therefore not expected to arrive to the Earth. More will be reported when coronagraph data become available. During the last 24 hours the solar protons remained at the background level.

The Earth is still inside the slow solar wind with the speed of about 340 km/s and the interplanetary magnetic field magnitude is about 2 nT. The geomagnetic conditions are presently quiet. We might expect unsettled to active geomagnetic conditions later today and tomorrow due to expected arrival of the fast solar wind associate with the extended coronal hole which reached central meridian on November 27.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 18 stations.

Indices solaires pour 29 Nov 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	068
AK Chambon La Forêt	004
AK Wingst	///
Ap estimé	003
Nombre international de taches solaires estimé	000 - 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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