Affichage des archives de vendredi, 5 janvier 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Jan 05 1342 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
05 Jan 2018	070	003
06 Jan 2018	071	004
07 Jan 2018	070	004

Bulletin

The solar activity was quiet over the past 24 hours and no flare has been recorded. A small sunspot has recently emerged (NOAA active region 2693) on the north-west quadrant of the visible disc. Quiet flaring conditions are expected for the next 24-hour period with possible but not very likely C-class flares from the newly emerged sunspot.

No Earth directed Coronal Mass Ejection has been observed. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

The Earth was within the slow solar wind speed regime over the past 24 hours. The solar wind speed was ranging between 350 and 400 km/s. The interplanetary magnetic field magnitude was below 5 nT, and the Bz component was ranging from -4 to 4 nT. A northern polar coronal hole extending down to latitude 20 degrees is currently facing Earth. Solar wind enhancements and high speed streams associated with the coronal hole are not expected to arrive before Jan 08.

The geomagnetic conditions were quiet and it is expected to remain quiet as the Earth is within the slow solar wind speed stream. Disturbance of the geomagnetic conditions are anticipated on Jan 08 due to the arrival of the high speed streams associated with the coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 011, sur la base de 09 stations.

Indices solaires pour 04 Jan 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	007
AK Wingst	003
Ap estimé	003
Nombre international de taches solaires estimé	013 - Basé sur 15 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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