Affichage des archives de vendredi, 25 septembre 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Sep 25 1231 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
25 Sep 2020	074	011
26 Sep 2020	074	017
27 Sep 2020	074	024

Bulletin

The x-ray flux has remained at the A level in the past 24 hours, no flares observed, the situation is not expected to change for the next 24 hours.

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 at nominal levels in the next 24 hours. The greater than 2 MeV electron flux passed slightly the 10^3 pfu threshold at 15:30 UT on 24 September, at 21:35 UT it came back to nominal levels but stayed very close to the limit. At 10:30 UT today it went above the threshold again, these flux enhancements are expected to remain present for the next 48 hours.

Solar wind speed near Earth as registered by DSCOVR ranged between 450 and 530 km/s in the past 24 hours. The Interplanetary Magnetic Field is directed away from the Sun (positive). It had a magnitude between 3 and 6 nT. Bz reached -6 nT.

Geomagnetic conditions have ranged from 0 to 4 both locally and at planetary levels. The Earth is still inside the relatively fast solar wind from a coronal hole. The solar wind speed may still go up in the next 48 hours, since the shape of the coronal hole is irregular. Mostly unsettled to active conditions expected (with possible isolated minor storm periods).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 005, sur la base de 17 stations.

Indices solaires pour 24 Sep 2020

Nombre de Wolf, observé par Catania	022
Flux solaire à 10 cm	074
AK Chambon La Forêt	023
AK Wingst	016
Ap estimé	017
Nombre international de taches solaires estimé	004 - Basé sur 24 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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