Affichage des archives de samedi, 26 août 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Aug 26 1231 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
26 Aug 2023	139	008
27 Aug 2023	140	010
28 Aug 2023	141	007

Régions solaires actives et éruptions solaires

There are six active regions visible on the disk. NOAA AR 3415 has evolved into a beta-delta magnetic field configuration, it is capable of producing M-class flares. The rest of the active regions have simple alpha or beta magnetic field configuration. Only C-class flaring has been observed in the last 24 hours, with the strongest one being a C5.0 one, from AR 3405 peaking at 15:49 UTC. C-class flares are expected and M-class flares are possible.

Éjection de masse coronale

There were no Earth-directed Coronal Mass Ejections (CMEs) detected in the available coronagraph observations in the last 24 hours.

Vent solaire

The solar wind arriving to the Earth is slow, with speeds around 400 km/s and interplanetary magnetic field around 8 nt. The CME from 22 August may arrive to the Earth today (although it has low chances of doing so), otherwise, similar slow wind conditions can be expected in the next 24 hours.

Géomagnétisme

During the last 24 hours the geomagnetic conditions have been quiet (NOAA KP 1-2, K Bel 1-2). Mostly quiet to unsettled conditions can be expected for the next 24 hours, with possible active periods (in particular if the CME from 22 August arrives to the Earth, this has low chances of happening).

Niveaux de flux de protons

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux remained below the 1000 pfu threshold as measured by GOES 16. It is expected to remain so in the next 24 hours. The 24 hour electron fluence was at normal levels and is expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 087, sur la base de 17 stations.

Indices solaires pour 25 Aug 2023

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	139
AK Chambon La Forêt	008
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	089 - Basé sur 21 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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