Affichage des archives de mardi, 10 août 2021

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2021 Aug 10 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
10 Aug 2021	074	011
11 Aug 2021	074	005
12 Aug 2021	074	004

Bulletin

Solar flaring activity was at very low levels. No significant flares have been recorded. Solar activity is expected to remain at very low levels.

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

The greater than 10 MeV proton flux was at background 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 remained below the 1000 pfu alert threshold, while the 24h electron fluence was at nominal levels over the past 24 hours. Over the next 24 hours they may increase slightly.

The solar wind parameters indicate we are possibly under the influence of the anticipated high speed stream associated with the negative polarity coronal hole crossing central meridian Aug 5. Over the past 24 hours the solar wind speed increased up to 450 km/s. The total magnetic field strength had values between 1 and 9 nT, while its Bz component varied between -6 and 7 nT. The interplanetary magnetic field phi angle was predominantly on the negative sector (directed towards the Sun). Over the next 24 hours, solar wind conditions are expected to remain at about these levels.

Geomagnetic conditions were at quiet to unsettled levels (NOAA Kp 0-2 and K Dourbes 0-3) over the past 24 hours. Quiet to unsettled conditions are expected over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 24 stations.

Indices solaires pour 09 Aug 2021

Nombre de Wolf, observé par Catania	012
Flux solaire à 10 cm	073
AK Chambon La Forêt	008
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	007 - Basé sur 33 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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