Affichage des archives de samedi, 1 décembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Dec 01 1254 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
01 Dec 2018	068	011
02 Dec 2018	067	012
03 Dec 2018	067	006

Bulletin

Solar flaring activity remains low, without any C-class or larger flares reported during last 24 hours. Sun is still spotless and we therefore do not expect any flaring activity in the coming days. There were no Earth directed CMEs reported during last 24 hours and the solar protons remained at the background level.

At about 01:00 UT this morning the interplanetary magnetic field magnitude started to increase simultaneously with the density increase. At about 10:00 UT also solar wind speed started to increase concurrently with the increase of the temperature, decrease of the density and change of the phi angle. All this indicate the arrival of the expected fast solar wind associated with the positive polarity equatorial coronal hole which reached central meridian on November 27. Solar wind speed is presently about 360 km/s and the interplanetary magnetic field magnitude is about 8 nT. The prominence eruption reported yesterday was associated with a faint partial halo CME of about 130 degrees of angular width and projected line of the sight speed of about 200 km/s (reported by CACTUS software). Although not very probable, glancing blow from a CME-driven shock wave might arrive to the Earth late evening on December 06. The geomagnetic conditions are presently quiet. We expect unsettled to possibly active geomagnetic conditions in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 08 stations.

Indices solaires pour 30 Nov 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	068
AK Chambon La Forêt	005
AK Wingst	///
Ap estimé	003
Nombre international de taches solaires estimé	/// - Basé sur /// 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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