Affichage des archives de vendredi, 7 novembre 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Nov 07 1243 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Moderate (ISES: Major) magstorm expected (A>=50 or K=6)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
07 Nov 2025	172	027
08 Nov 2025	178	026
09 Nov 2025	182	010

Régions solaires actives et éruptions solaires

Solar flaring activity was moderate over the past 24 hours, with 1 M-class flare identified. The largest flare was an M1.7 flare (SIDC Flare 5971) peaking on November 07 at 07:16 UTC, which was produced by SIDC Sunspot Group 687 (NOAA Active Region 4274). A total of 7 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Group 687 (NOAA Active Region 4274) is the largest region on disk. Both SIDC Sunspot Group 687 (NOAA Active Region 4274) and SIDC Sunspot Group 689 (NOAA Active Region 4276) are the most magnetically complex (Beta-Gamma-Delta) regions on disk and produced most of the flaring activity in the last 24 hours. Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares very likely and a small chance for X-class flares.

Éjection de masse coronale

A halo Coronal Mass Ejection (CME) (SIDC CME 596) was detected in SOHO/LASCO-C2 data around 07:36 UTC on November 07. This CME is associated with a M1.76 flare (SIDC flare 5971) peaking on November 07 at 14:00 UTC, which was produced by SIDC Sunspot Group 687 (NOAA Active Region 4274) and a type IV radio burst. Analysis of this CME is ongoing.

Vent solaire

Over the past 24 hours, the Earth was under the waning influence of an ICME and came under the influence of a second ICME associated with a CME (SIDC CME 593) that left the Sun on November 04. The solar wind speed started the reporting period around 530 km/s, gradually increased and then jumped from 665 km/s to 811 km/s at 04:50 UT on November 07. The total interplanetary magnetic started the reporting period around 6 nT, gradually increased and then jumped from 8 to 17 nT at the same time. The Bz component reaching a minimum of -16 nT in the last 24 hours. The phi-angle was mainly in the negative sector (directed towards the Sun), with periods in the positive sector. In the next 24 hours, the solar wind conditions are expected to remain disturbed due to the possible arrival of a CME (SIDC CME 594) that left the Sun on November 05.

Géomagnétisme

The geomagnetic conditions reached minor storm conditions (Kp 5) globally and active condtions (K BEL 4) locally. Moderate to major storm conditions are expected in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV GOES proton flux was at background levels and is expected to remain at background levels over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

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

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 130, sur la base de 14 stations.

Indices solaires pour 06 Nov 2025

Nombre de Wolf, observé par Catania	122
Flux solaire à 10 cm	163
AK Chambon La Forêt	044
AK Wingst	038
Ap estimé	046
Nombre international de taches solaires estimé	112 - 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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