Affichage des archives de vendredi, 30 janvier 2026

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 Jan 30 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
30 Jan 2026	127	008
31 Jan 2026	125	007
01 Feb 2026	123	004

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. A total of 12 numbered sunspot groups were identified on the visible solar disk over the past 24 hours. All regions are relatively small and remain magnetically simple (classified as magnetic type alpha or beta). The strongest flaring activity was a C1.7 flare (SIDC Flare 6760) with peak time 08:63 UTC on Jan 30, produced by SIDC Sunspot Group 781 (NOAA Active Region 4363) near the east limb. The solar flaring activity is expected to be low over the next 24 hours with very likely C-class flares and small chances for M-class flaring.

Éjection de masse coronale

No Earth-directed coronal mass ejections (CMEs) have been identified in the available coronagraph imagery over the past 24 hours.

Vent solaire

Over the past 24 hours the solar wind parameters (as measured by ACE at L1) were under a waning influence of a high speed stream related to the negative polarity coronal hole (SIDC Coronal Hole 147). The solar wind speed was gradually decreasing with values varying in the range of 517 km/s to 781 km/s. The magnitude of the interplanetary magnetic field (B) has decreased reaching a maximum value of 6.2 nT with a minimum north-south (Bz) component of - 5.7 nT. The B field phi angle remained predominantly in the negative sector (directed towards the Sun) reflecting the polarity of the geo-effective SIDC Coronal Hole 147. The solar wind parameters are expected to follow a gradual trend towards nominal slow solar wind conditions over the next 24 hours and register nominal values thereafter.

Géomagnétisme

The geomagnetic conditions over the past 24 hours have been quiet to active. Predominantly quiet to unsettled geomagnetic conditions are expected for the next 24 hours with chances for isolated active periods under the waning influence of a high speed stream. Mostly quiet conditions are expected thereafter.

Niveaux de flux de protons

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and it is expected to remain so over the next days.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux as measured by GOES 18 and GOES 19 was exceeding the 1000 pfu threshold over the past 24 hours. The greater than 2 MeV electron flux is expected to remain above the 1000 pfu threshold for prolonged periods of time over the next 24 hours. The 24-hour electron fluence was at moderate levels and is expected to increase towards the border of moderate to high levels over the next 24 hours. The 24-hour electron fluence is expected to remain at or above moderate levels over the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 091, sur la base de 10 stations.

Indices solaires pour 29 Jan 2026

Nombre de Wolf, observé par Catania	163
Flux solaire à 10 cm	129
AK Chambon La Forêt	030
AK Wingst	031
Ap estimé	028
Nombre international de taches solaires estimé	104 - Basé sur 12 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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