Affichage des archives de mardi, 4 septembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Sep 04 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
04 Sep 2018	068	005
05 Sep 2018	068	005
06 Sep 2018	068	012

Bulletin

Solar activity was at very low levels. No earth-directed coronal mass ejections (CMEs) were observed in the available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. A small negative polarity coronal hole is transiting the Central Meridian.

Solar activity is expected to remain at very low levels.

Around 22:45UT on 3 September, solar wind speed started a gradual increase from about 330 km/s to its current values around 400 km/s (DSCOVR). Bz varied between -7 and +5 nT, with a negative 1-hour stretch near -6 nT centered on 04:10UT. The direction of the interplanetary magnetic field was variable, being in a mostly positive sector (away from the Sun) after 05UT.

Quiet to unsettled geomagnetic conditions were observed and are expected to continue. On 6 and 7 September, active conditions are possible with the arrival of the co-rotating interaction region (CIR) and wind stream from the negative polarity CH.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 17 stations.

Indices solaires pour 03 Sep 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	068
AK Chambon La Forêt	010
AK Wingst	006
Ap estimé	004
Nombre international de taches solaires estimé	000 - Basé sur 31 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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