Affichage des archives de vendredi, 25 février 2022

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2022 Feb 25 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
25 Feb 2022	093	009
26 Feb 2022	095	015
27 Feb 2022	097	015

Bulletin

The Sun produced no C flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at 40%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron flux exceeded the 1000 pfu threshold in the past 24 hours, and may exceed that threshold again in the next 24 hours. The greater than 2 MeV electron fluence was at nominal levels in the past 24 hours, and may reach moderate levels in the next 24 hours.

The solar wind speed as registered by DSCOVR varied between about 380 and 490 km/s in the past 24 hours, with current values near 445 km/s. The magnitude of the Interplanetary Magnetic Field near Earth (IMF) varied between about 0 and 8 nT, and its orientation was predominantly away from the Sun. There were no extended time intervals with Bz below -5 nT. A further decrease of solar wind conditions is expected on February 25. On February 26 and 27, enhanced solar wind levels are possible due to the expected arrival of a high speed stream from a positive polarity equatorial coronal hole.

Quiet geomagnetic conditions (K-BEL between 1 and 2; NOAA Kp between 0 and 3) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K-BEL < 4) are expected on February 25, with a chance for active intervals (K-BEL = 4). Active intervals are possible on February 26 and 27, with a slight chance for minor storm intervals (K-BEL = 5), due to the expected arrival of a high speed stream from a positive polarity equatorial coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 022, sur la base de 17 stations.

Indices solaires pour 24 Feb 2022

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	092
AK Chambon La Forêt	009
AK Wingst	007
Ap estimé	007
Nombre international de taches solaires estimé	036 - Basé sur 18 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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