Affichage des archives de samedi, 22 août 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Aug 22 1256 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
22 Aug 2020	071	007
23 Aug 2020	071	008
24 Aug 2020	072	003

Bulletin

Solar flaring activity was at very low levels. No significant flares have been recorded. A B1.6 flare recorded at Aug 21 (01:58UT, S31E52) was followed by a coronal dimming, visible in SDO/AIA data. 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 over the past 24 hours. It is expected to stay at background levels for the next 24 hours. The greater than 2 MeV electron flux was at nominal levels over the past 24 hours and is expected to remain so over the next 24 hours.

The speed of the solar wind varied between 310 and 365 km/s (DSCOVR). The polarity of the Interplanetary Magnetic Field (IMF) was predominatly towards the Sun (phi angle in the negative sector) until Aug 21 22:00UT, while varying since then. Bz fluctuated between -6 and +7 nT. The magnitude of the magnetic field varied between 1 and 8 nT. The extension of the Northern coronal hole is crossing central meridian. Over the next 24 hours, the solar wind parameters are expected to be slightly influenced from the remaining HSS of the coronal hole crossing central meridian Aug 19.

The geomagnetic conditions were quiet to unsettled. The values registered for the past 24 hours were 0-3 for K Dourbes and 1-2 for NOAA Kp. Quiet to unsettled conditions are expected for 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 21 Aug 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	009
AK Wingst	006
Ap estimé	004
Nombre international de taches solaires estimé	004 - Basé sur 28 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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