Affichage des archives de samedi, 26 février 2022

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2022 Feb 26 1232 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
26 Feb 2022	098	010
27 Feb 2022	100	015
28 Feb 2022	101	007

Bulletin

A region rotating into view from behind the southeast limb produced a C5.1 flare peaking at 21:40 UT on February 25. The chance for a C flare in the next 24 hours is estimated at 70%, mainly from this region, with a 20% chance for an M flare.

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 is expected to 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 is expected to stay at nominal levels in the next 24 hours.

The solar wind speed as registered by DSCOVR decreased from about 445 to 370 km/s in the past 24 hours. The magnitude of the Interplanetary Magnetic Field near Earth (IMF) varied between about 0 and 6 nT, and its orientation was predominantly away from the Sun. Bz was never below -5 nT. In the next days, enhanced solar wind levels are possible due to the expected arrival of a high speed stream from a positive polarity equatorial coronal hole.

Quiet to unsettled geomagnetic conditions (K-BEL between 0 and 3; NOAA Kp between 0 and 2) were registered in the past 24 hours. Active intervals are possible on February 26, 27 and 28, 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 : 025, sur la base de 25 stations.

Indices solaires pour 25 Feb 2022

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	096
AK Chambon La Forêt	010
AK Wingst	009
Ap estimé	009
Nombre international de taches solaires estimé	022 - Basé sur 23 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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