Affichage des archives de jeudi, 26 mars 2026

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 Mar 26 1259 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
26 Mar 2026	142	010
27 Mar 2026	145	005
28 Mar 2026	150	010

Régions solaires actives et éruptions solaires

Solar flaring activity was moderate over the past 24 hours, as an M3.9 (SIDC flare 7259) was detected on 26 Mar at 06:23 UTC. It was produced by SIDC Sunspot Group (SG) 832 (NOAA Active Region [AR] 4403) despite having a Alpha magnetic configuration. The same SG also produced three C-class flares at the second half of 25 Mar. SIDC SG 834 is another region of interest as it also produced three C-class flares, although most of it is behind the East limb. Its brightest flare was SIDC flare 7267, a C5 emitted on 26 Mar at 08:47 UTC. It is most likely a much brighter flare, but obscured by the solar limb. Further isolated M-class flares are likely in the next 24 hours, either from SIDC SG 832 or 834.

Éjection de masse coronale

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours.

Vent solaire

The Solar Wind (SW) conditions returned to a slow SW regime, as the effects of the High Speed Stream diminished during the last 24 hours. The SW speed decreased from 600 to 400 km/s, the interplanetary magnetic field (B) ranged between 3 and 8 nT, and its North-South component (Bz) varied from -5 nT to 7 nT. A glancing blow from SIDC CME 642 (launched on 22 Mar 23:54 UTC) has a chance of arrival in the next 24 hours, but is expected to have a minor effect.

Géomagnétisme

The geomagnetic conditions were globally (NOAA Kp) and locally (K BEL) quiet to unsettled during the past 24 hours. They are expected to remain at quiet to unsettled level during the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux, as measured by the GOES-19 satellite, was at background levels over the past 24 hours and is likely to remain so in the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

During the past 24 hours, the greater than 2 MeV electron flux as measured by GOES 19 was above the 1000 pfu alert threshold and ranged between 1000 and 10000 pfu. A small drop is expected in the next 24 hours, however it is likely that the electron flux will remain above the alert threshold level. The electron fluence decreased fro high to moderate levels on 25 Mar at 19:35 UTC. It is likely to remain at moderate levels in the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 113, sur la base de 16 stations.

Indices solaires pour 25 Mar 2026

Nombre de Wolf, observé par Catania	123
Flux solaire à 10 cm	140
AK Chambon La Forêt	020
AK Wingst	013
Ap estimé	015
Nombre international de taches solaires estimé	113 - 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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