Affichage des archives de samedi, 26 septembre 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Sep 26 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
26 Sep 2020	073	040
27 Sep 2020	074	017
28 Sep 2020	075	028

Bulletin

NOAA AR 2773 has one sunspot and simple alpha magnetic field configuration. This was enough to produce a C1.0 flare, peaking at 00:38 UT. Mostly B-class flares can be expected for the next 24 hours, with C-class flares remaining possible.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay so in the next 24 hours. The greater than 2 MeV electron flux was above the threshold until 21:50 UT on 25 September, when it came back to nominal levels. More enhancements can be expected in the next 48 hours.

Solar wind speed near Earth as registered by DSCOVR ranged between 450 and 560 km/s in the past 24 hours. The Interplanetary Magnetic Field is directed away from the Sun (positive), but it was mostly toward the Sun (negative) during 25 September. It had a magnitude between 3 and 8 nT. Bz reached -5 nT.

Geomagnetic conditions have reached minor storm conditions both locally and at planetary levels (KDourbes = 5 and Kp = 5). The Earth is still inside the fast solar wind from the low latitudinal extension of the northern polar coronal hole. The solar wind speed may still go up in the next 48 hours, causing more storm periods.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 16 stations.

Indices solaires pour 25 Sep 2020

Nombre de Wolf, observé par Catania	011
Flux solaire à 10 cm	073
AK Chambon La Forêt	038
AK Wingst	///
Ap estimé	024
Nombre international de taches solaires estimé	005 - Basé sur 23 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

<< Aller à l'aperçu quotidien