Affichage des archives de vendredi, 25 août 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Aug 25 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
25 Aug 2023	144	007
26 Aug 2023	144	007
27 Aug 2023	144	007

Régions solaires actives et éruptions solaires

There are six active regions visible on the disk. They all have simple alpha or beta magnetic field configuration. An M1.4 flare was observed, from NOAA AR 3415, peaking at 01:09 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

In the last 24 hours, the Earth was briefly inside a mild high speed stream from a small coronal hole, with speeds reaching 500 km/s and an interplanetary magnetic field up to 9 nT, and Bz down to -7 nT. Conditions have now returned to a slow solar wind regime, with speeds close to 400 km/s and interplanetary magnetic field around 5 nT. Similar conditions can be expected in the next 24 hours.

Géomagnétisme

During the last 24 hours the geomagnetic conditions reached active levels locally and unsettled levels globally (NOAA KP 1-3, K Bel 1-4). Mostly quiet to unsettled conditions can be expected for the next 24 hours.

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 : 090, sur la base de 10 stations.

Indices solaires pour 24 Aug 2023

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	144
AK Chambon La Forêt	016
AK Wingst	012
Ap estimé	011
Nombre international de taches solaires estimé	091 - Basé sur 22 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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