Affichage des archives de mardi, 28 janvier 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Jan 28 1246 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
28 Jan 2020	073	001
29 Jan 2020	073	003
30 Jan 2020	073	003

Bulletin

The solar activity has been very low over the past 24 hours with no significant flares recorded. Catania sunspot group number 28 (NOAA Active Region 2757) currently visible on disc in the north-west hemisphere has slightly decayed over the past 24 hours. Quiet flaring conditions are expected for the next 24-hour period. No Earth-directed CMEs were observed in the available coronagraphic imagery over the past 24 hours. The greater than 10 MeV solar proton flux was at nominal levels and is expected to remain so.

The solar wind speed was at background level with nominal values, ranging from 300 to 350 km/s (ACE). The total interplanetary magnetic field and the fluctuating Bz component remained below 5 nT with predominantly positive Bz.

The geomagnetic activity has been quiet over the past 24 hours with both local K (Dourbes) and NOAA Kp index ranging between 0 to 2. The geomagnetic conditions are expected to remain predominantly quiet.

The CME observed in STEREO-A on Jan 25 may have a possible Earth directed component. If it were to arrive at Earth unsettled conditions would be expected on Jan 30-31.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 013, sur la base de 14 stations.

Indices solaires pour 27 Jan 2020

Nombre de Wolf, observé par Catania	015
Flux solaire à 10 cm	073
AK Chambon La Forêt	006
AK Wingst	002
Ap estimé	001
Nombre international de taches solaires estimé	014 - Basé sur 19 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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