Affichage des archives de dimanche, 30 septembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Sep 30 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
30 Sep 2018	069	007
01 Oct 2018	069	010
02 Oct 2018	069	007

Bulletin

Solar activity was very low with X-ray flux remaining below B level. A new bipolar active region (NOAA 2723) emerged but is inactive. Chances for X-ray flaring are thus increasing but X-ray flux is still expected to be below C level.

No Earth directed CMEs have been recorded in coronagraph images.

Proton flux levels were at background values and are expected to remain so.

A negative polarity equatorial coronal hole is currently transiting the central meridian and is expected to become geoeffective by late October 3.

Solar wind saw some transient perturbations with solar wind speed reaching 500 km/s and total magnetic field reaching 8nT. Bz was mostly positive. Currently, Solar wind speed is back at near 430 km/s and total magnetic field at a nominal 2-4nT. Near nominal solar wind conditions are expected over the next days.

Geomagnetic conditions were quiet to unsettled (both NOAA Kp and local K Dourbes 0-3). Geomagnetic conditions are expected to be quiet to unsettled over the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 016, sur la base de 22 stations.

Indices solaires pour 29 Sep 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	069
AK Chambon La Forêt	016
AK Wingst	012
Ap estimé	012
Nombre international de taches solaires estimé	000 - Basé sur 29 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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