Affichage des archives de lundi, 6 avril 2026

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 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 2026	119	007
07 Apr 2026	116	007
08 Apr 2026	114	007

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours, with several C-class flares recorded. The largest flare was a C2.8 flare (SIDC Flare 7371), peaking at 23:47 UTC on April 05, associated with SIDC Sunspot Group 838 (NOAA Active Region 4409; magnetic type beta-gamma). There are currently seven numbered active regions on the visible solar disk. SIDC Sunspot Group 838 is the largest and most magnetically complex region on the disk and produced most of the flaring activity over the past 24 hours. SIDC Sunspot Group 835 (NOAA Active Region 4404; magnetic type beta) is approaching the west limb but remained quiet. The remaining active regions are relatively simple (magnetic type alpha or beta) and did not produce any significant flaring activity. Solar flaring activity is expected to remain low over the next 24 hours, with C-class flares very likely and a chance of M-class flares.

Éjection de masse coronale

No Earth-directed CMEs have been detected in the available coronagraph imagery over the past 24 hours.

Vent solaire

Over the past 24 hours, solar wind parameters (ACE and DSCOVR) reflected the waning influence of the high-speed stream from SIDC Coronal Hole 149 (negative polarity). The solar wind speed ranged between 500 km/s and 570 km/s. The interplanetary magnetic field remained weak, below 5 nT. A gradual transition to slow solar wind conditions is expected over the next days.

Géomagnétisme

Geomagnetic conditions were quiet to unsettled both globally and locally over Belgium (Kp 1 to 3 and K-Bel 1 to 3). Mostly quiet conditions are expected over the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux, as measured by GOES-18, was at near-background levels over the past 24 hours. The greater than 10 MeV GOES proton flux is expected to remain below the 10 pfu threshold over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux, as measured by GOES-19, exceeded the 1000 pfu alert threshold over the past 24 hours, with a peak value of 11760 pfu. It is expected to remain above the alert threshold over the next 24 hours. The 24-hour electron fluence was at moderate levels during the past 24 hours and is expected to remain at these levels over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 105, sur la base de 22 stations.

Indices solaires pour 05 Apr 2026

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	118
AK Chambon La Forêt	015
AK Wingst	014
Ap estimé	014
Nombre international de taches solaires estimé	101 - 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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