Affichage des archives de jeudi, 16 août 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Aug 16 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
16 Aug 2018	069	013
17 Aug 2018	069	012
18 Aug 2018	069	007

Bulletin

The solar activity has been quiet over the past 24 hours. The sunspot group (NOAA 2718) remained stable and no significant flare has been recorded. Quiet flaring conditions are expected for the next 24-hour period.

No Earth directed Coronal Mass Ejection has been observed. The solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

Over the past 24 hours, the solar wind measurements continued to be enhanced with the solar wind associated to the Coronal Hole (which has crossed the central meridian on August 11). The wind speed increased from 450 km/s to about 500 km/s; The interplanetary magnetic field strength fluctuated between 3 and 13 nT; The Southward magnetic component fluctuated between -8 and 10 nT. The enhanced solar wind conditions are expected to persist for the next 24 hours and start to decline on August 18.

Due to the enhanced solar wind conditions, the geomagnetic conditions was unsettled to active (K-Dourbes and Kp were ranging between 2 and 4). Unsettled conditions is expected until while the Earth remains under the influence of the solar wind associated to the coronal hole. Active conditions are likely especially if the southward magnetic component remains negative for longue periods.

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

Indices solaires pour 15 Aug 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	069
AK Chambon La Forêt	030
AK Wingst	020
Ap estimé	020
Nombre international de taches solaires estimé	013 - Basé sur 19 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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