Affichage des archives de jeudi, 20 février 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Feb 20 1231 UTC

Prévisions SIDC

Éruptions solaires

M-class flares expected (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
20 Feb 2025	178	010
21 Feb 2025	176	007
22 Feb 2025	174	007

Régions solaires actives et éruptions solaires

A total of 8 numbered sunspot groups were identified on the disk over the past 24 hours. Solar activity has been low. The largest flare was a C8.1 flare (SIDC Flare 3659) peaking on February 19 at 23:45 UTC, which was produced by SIDC Sunspot Group 346 (NOAA Active Regions 3933, 3961, 3990). This sunspot group, together with SIDC Sunspot Group 405 (NOAA Active Region 3996, Beta-Gamma magnetic configuration) and SIDC Sunspot Group 408 (NOAA Active Region 3998, Beta-Delta magnetic configuration) have potential for creating larger flares. Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares likely and a small chance for X-class flares.

Éjection de masse coronale

No Earth directed CMEs were observed in the last 24 hours.

Vent solaire

The solar wind speed at Earth has been steady at around 480 km/s in the last 24 hours, with an interplanetary magnetic field currently around 5 nT. Similar conditions, with probably lower solar wind speeds, can be expected in the next 24 hours.

Géomagnétisme

Geomagnetic conditions reached active levels globally and locally (Kp and K_Bel up to 4). Mostly quiet to unsettled conditions can be expected for the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux was below the threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 10 MeV GOES 16 and 18 electron flux has been below the threshold in the last 24 hours It is expected to remain below the threshold in the next 24 hours. The 24-hour electron fluence is currently at normal levels and is expected to remain so in the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 134, sur la base de 08 stations.

Indices solaires pour 19 Feb 2025

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	178
AK Chambon La Forêt	026
AK Wingst	025
Ap estimé	024
Nombre international de taches solaires estimé	117 - Basé sur 13 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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