Affichage des archives de dimanche, 11 avril 2021

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2021 Apr 11 1231 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
11 Apr 2021	070	006
12 Apr 2021	072	004
13 Apr 2021	070	009

Bulletin

The solar activity has been very low over the past 24 hours. The region in the SE quadrant has developed a sunspot and has had low activity. The solar activity is expected to remain at low levels over the next 24 hours.

No Earth-directed coronal mass ejections were observed in the available coronagraphic imagery.

The greater than 10 MeV proton flux was at background 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 remained below the 1000 pfu alert threshold, were it is expected to remain during the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain at those levels over the next 24 hours.

The solar wind speed slightly increased from 320 to 380 km/s over the past 24 hours. The total magnetic field strength fluctuated between 2 and 7 nT. The values of the Bz component varied between -6 and +4 nT. The interplanetary magnetic field phi angle switched from the positive sector (directed away from the Sun) to the negative sector around April 10 02:20UT. Any effects from the high speed stream from the small, negative polarity coronal hole at central meridian April 8 have been minor. Over the next 24 hours, we can expect the last of its effects and return of solar wind parameters to background levels.

Geomagnetic conditions were at quiet levels (NOAA Kp and local K Dourbes 0-2) over the past 24 hours. Quiet to unsettled conditions are expected over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 013, sur la base de 13 stations.

Indices solaires pour 10 Apr 2021

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	012
AK Wingst	006
Ap estimé	004
Nombre international de taches solaires estimé	000 - Basé sur 17 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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