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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 Mar 06 1231 UTC

Prévisions SIDC

Éruptions solaires

M-class flares expected (probability >=50%)

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
06 Mar 2026	148	010
07 Mar 2026	150	025
08 Mar 2026	152	021

Régions solaires actives et éruptions solaires

Solar flaring activity during the last 24 hours has been low, with few C-class flares. The strongest flare was a C1.9 flare (SIDC Flare 7136), peaking at 22:42 UTC on March 05, associated with SIDC Sunspot Group 804 (NOAA Active Region 4381, magnetic type beta). There are currently five numbered active regions on the solar disk. The most complex one is SIDC Sunspot Group 801 (NOAA Active Region 4378, magnetic type beta-delta). The solar flaring activity is expected to be low to moderate over the next 24 hours, with C-class flares very likely and M-class flares probable.

Éjection de masse coronale

A Coronal Mass Ejection (SIDC CME 635) was observed in LASCO/C2 coronagraph imagery, lifting off from the west limb around 19:30 UTC on March 05. It is likely associated with a prominence eruption over the west limb and it is not expected to impact Earth. SIDC CME 636 was observed in LASCO/C2 and STEREO-A coronagraph imagery, lifting off from the southeast limb around 04:15 UTC on March 06. It is likely associated with a filament eruption in the southeast quadrant, near Sunspot Group 811 (NOAA Active Region 4385), observed in SUVI 304 data starting from 02:50 UTC. It is not expected to impact Earth. No other Earth-directed CMEs were observed in the available coronagraph imagery during the last 24 hours.

Trous coronaux

The northern, mid-latitude, negative polarity coronal hole (returning SIDC Coronal Hole 142) has been crossing the central meridian since March 05.

Vent solaire

Over the last 24 hours, the solar wind parameters (ACE and DSCOVR) reflected slow solar wind conditions. The solar wind speed remained below 390 km/s, reaching a minimum of 340 km/s. The interplanetary magnetic field was mostly around 5 nT. The Bz component varied between -3 nT and 5 nT. The interplanetary magnetic field angle phi was initially mostly in the positive sector, flipping to negative at 09:00 UTC on March 06. Enhanced solar wind conditions are expected over the next 24 hours, due to the probable arrival of a high-speed stream from the equatorial, negative polarity coronal hole (SIDC Coronal Hole 149).

Géomagnétisme

Geomagnetic conditions globally reached unsettled levels (NOAA Kp 3- ) between 03:00 UTC and 06:00 UTC on March 06. Geomagnetic conditions locally were at quiet levels (K Bel 1 to 2) during the last 24 hours. Active to minor storm conditions (NOAA Kp 4 to 5) are expected over the next 24 hours, due to the likely arrival of a high-speed stream from the equatorial, negative polarity coronal hole (SIDC Coronal Hole 149).

Niveaux de flux de protons

The greater than 10 MeV proton flux was below the 10 pfu threshold during the last 24 hours. It is expected to remain below the threshold level over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux measured by GOES 18 and GOES 19 was below the 1000 pfu threshold during the last 24 hours and it is expected to remain so over the next 24 hours. The 24-hour electron fluence was at normal levels and it is expected remain so over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 084, sur la base de 15 stations.

Indices solaires pour 05 Mar 2026

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	146
AK Chambon La Forêt	007
AK Wingst	003
Ap estimé	003
Nombre international de taches solaires estimé	091 - Basé sur 30 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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