Affichage des archives de samedi, 12 mai 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 May 12 1230 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
12 May 2018	070	011
13 May 2018	070	006
14 May 2018	070	005

Bulletin

Solar activity was at very low levels. Small and inactive region NOAA 2709 (Catania 81) doubled its number of sunspots to 2. 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 remained under the influence of the wind stream from an elongated negative polarity equatorial coronal hole (CH). Solar wind speed first decreased from about 480 km/s to 420 km/s by 23UT, then started a gradual increase to values near 520 km/s by the end of the period (DSCOVR). Bz varied between -6 and +4 nT, and was predominately negative until about 04UT. The interplanetary magnetic field was mainly directed towards the Sun. Geomagnetic activity ranged from quiet to mostly unsettled levels in Dourbes, with Kp recording 3 active intervals.

Quiet to unsettled geomagnetic conditions are expected, with a chance on an isolated active interval.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 013, sur la base de 18 stations.

Indices solaires pour 11 May 2018

Nombre de Wolf, observé par Catania	011
Flux solaire à 10 cm	070
AK Chambon La Forêt	026
AK Wingst	016
Ap estimé	017
Nombre international de taches solaires estimé	011 - Basé sur 28 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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