Affichage des archives de vendredi, 23 février 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Feb 23 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
23 Feb 2018	068	021
24 Feb 2018	068	012
25 Feb 2018	068	012

Bulletin

There are no sunspot regions on the visible hemisphere of the Sun and flaring level is very low. The chance for a C flare in the next 24 hours is estimated at 5%.

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 solar wind speed (recorded by DSCOVR and ACE) gradually increased from about 405 to 550 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was directed mainly toward the Sun and its magnitude ranged between about 2 and 11 nT. Bz was variable and dived below -5 nT several times, with a minimum of about -8 nT. On February 23, 24 and 25 the solar wind is expected to be at nominal levels, possibly with occasional periods of enhanced solar wind as the Earth comes close to the high speed stream associated with the negative polarity south polar coronal hole.

Quiet to active geomagnetic conditions (K Dourbes between 1 and 4; NOAA Kp between 2 and 5) were registered in the past 24 hours. Quiet to active geomagnetic levels (K Dourbes < 5) are expected for February 23, 24 and 25, with a chance for minor storm intervals (K Dourbes = 5) when the Earth comes close to the high speed stream associated with the negative polarity south polar coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 16 stations.

Indices solaires pour 22 Feb 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	025
AK Wingst	016
Ap estimé	014
Nombre international de taches solaires estimé	000 - Basé sur 32 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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