Affichage des archives de dimanche, 13 mai 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 May 13 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
13 May 2018	070	004
14 May 2018	069	005
15 May 2018	069	003

Bulletin

Solar activity was at very low levels. Sunspot region NOAA 2709 (Catania 81) is slowly decaying and barely visible. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Earth was under the waning influence of the wind stream from an elongated negative polarity equatorial coronal hole (CH). Solar wind speed first declined from 520 km/s to 440 km/s by 23UT, before enhancing again to 500 km/s (DSCOVR). By the end of the period, wind speed values were near 430 km/s. Bz was first steady with values near 0 nT until midnight, when it started varying between -6 and +4 nT. The interplanetary magnetic field was mainly directed towards the Sun. Geomagnetic activity was mostly quiet, with an unsettled episode recorded by Dourbes during the 21-24UT interval.

Mostly quiet geomagnetic conditions are expected, with a chance on an unsettled interval.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 011, sur la base de 10 stations.

Indices solaires pour 12 May 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	011
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	013 - Basé sur 24 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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