Affichage des archives de mercredi, 26 août 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Aug 26 1231 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
26 Aug 2020	071	013
27 Aug 2020	071	012
28 Aug 2020	071	013

Bulletin

Solar X-ray flux has been below background (B) level throughout the period. There are no spotted regions on disc and X-ray flux is expected to remain at or below background (B) values.

There were no Earth directed coronal mass ejections observed in coronagraph data.

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.

Another coronal hole of positive polarity seems to be forming around disc centre and adds to the likelihood of Solar wind perturbations later in the week.

Solar wind conditions showed the expected enhancements. Solar wind speed rose from under 350 km/s to currently just under 450 km/s. The magnetic field phi angle switched into the away sector early in the period. The total magnetic field reached a peak of 8.5 nT this morning and remains at levels around 6nT, while Bz was overall variable. As other coronal holes are lining up, these moderate Solar wind enhancements are expected to last on and off over the next days.

Quiet to unsettled geomagnetic conditions have been recorded (NOAA Kp 1-2 while local K Dourbes reaching 3 just recently). Geomagnetic conditions are expected to be mostly quiet to unsettled, with some isolated active periods not excluded depending on the evolution of the Solar wind enhancements.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 14 stations.

Indices solaires pour 25 Aug 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	009
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	000 - Basé sur 23 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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