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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Apr 06 1231 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
06 Apr 2024	121	007
07 Apr 2024	121	007
08 Apr 2024	121	007

Régions solaires actives et éruptions solaires

The solar flaring activity was low over the past 24 hours. The large flare was a C2.0 observed from the active region NOAA 3630. Few sunspots groups are visible on the disc. However they remain quiet. The solar flaring activity is expected to be at low levels over the next 24 hours, with possible C-class flares.

Éjection de masse coronale

No Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery.

Trous coronaux

A small negative polarity equatorial coronal hole has crossed the central meridian on April 05.

Vent solaire

The solar wind conditions undergo mild influence of the high- speed stream from the negative polarity equatorial coronal hole (that crossed the central meridian on April 01). The interplanetary magnetic field phi is in the negative sector (directed towards the Sun). The solar wind speed ranging between 400 km/s and 500 km/s. The total interplanetary magnetic field reached values around 9.5 nT and the Bz component reached values up to -7.6 nT. The high-speed stream associated to the small negative polarity equatorial coronal hole may contribute to the solar wind enhancement in the next day. The solar wind conditions are expected to remain slightly enhanced on April 06 and April 07.

Géomagnétisme

Geomagnetic conditions were unsettled (NOAA Kp 2-3 and Local K Bel 1-2) in response of the high-speed stream from the negative polarity equatorial coronal hole (that crossed the central meridian on April 01). Geomagnetic conditions are expected to be at unsettled conditions on April 06 and 07.

Niveaux de flux de protons

Over the past 24 hours, the greater than 10 MeV GOES proton flux was below the 10 pfu threshold and is expected to remain below this threshold for the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux remained below the 1000 pfu threshold as measured by GOES 16. It is expected to remain below this threshold over the next days. The 24-hour electron fluence was at nominal levels. The electron fluence is expected to be at nominal levels over the next day.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 081, sur la base de 14 stations.

Indices solaires pour 05 Apr 2024

Nombre de Wolf, observé par Catania	108
Flux solaire à 10 cm	121
AK Chambon La Forêt	019
AK Wingst	011
Ap estimé	011
Nombre international de taches solaires estimé	080 - Basé sur 22 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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