Affichage des archives de lundi, 21 août 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Aug 21 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
21 Aug 2023	146	007
22 Aug 2023	148	007
23 Aug 2023	150	007

Régions solaires actives et éruptions solaires

There are seven active regions visible on the disk. They all have simple alpha or beta magnetic field configuration. Only C-class flares have occurred in the last 24 hours. The largest flare was a C4.4 flare peaking at 07:53 UTC, from a region rotating into view from the east limb. C-class flares are expected and M-class flares are possible (mostly from the new region), for the next 24 hours.

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 Earth is inside a fast solar wind stream, with speeds around 600 km/s and an interplanetary magnetic field around 5 nT. The interplanetary magnetic field orientation was predominantly in the negative sector (field directed towards the Sun). The solar wind is expected to gradually decrease its speed in the coming days.

Géomagnétisme

During the last 24 hours the geomagnetic conditions were at quiet to unsettled levels (NOAA KP 1-3, K Bel 1-3). Geomagnetic conditions are expected to be at unsettled levels, with isolated active periods possible due to the ongoing high speed stream influence.

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 days.

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 may increase above this threshold 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 : 111, sur la base de 20 stations.

Indices solaires pour 20 Aug 2023

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	146
AK Chambon La Forêt	013
AK Wingst	012
Ap estimé	012
Nombre international de taches solaires estimé	106 - Basé sur 29 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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