Affichage des archives de dimanche, 27 janvier 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Jan 27 1335 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
27 Jan 2019	076	007
28 Jan 2019	077	006
29 Jan 2019	076	007

Bulletin

During last 24 hours NOAA AR 2733 was source of B-class flares, and an isolated GOES C5.0 flare (peaked at 13:22 UT on January 26). The NOAA AR 2733 is approaching the West solar limb, but it still has beta configuration of its photospheric magnetic field and is expected to be the source of B-class and possibly also isolated C-class flares in the coming hours. There were no wide Earth directed CMEs reported during last 24 hours. The solar protons remained at the background level.

The solar wind speed continues to decrease and it presently amounts about 430 km/s. The interplanetary magnetic field magnitude is 4 nT. Equatorial coronal hole of negative polarity reached central meridian this morning. Coronal hole is very patchy, but rather large and possibly connected with the southern polar coronal hole. The associated fast solar wind might be expected at the Earth on January 30. The geomagnetic conditions are presently quiet to unsettled and we expect quiet geomagnetic conditions in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 022, sur la base de 05 stations.

Indices solaires pour 26 Jan 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	077
AK Chambon La Forêt	012
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	028 - Basé sur 11 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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