Affichage des archives de samedi, 12 juillet 2025

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2025 Jul 12 1231 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
12 Jul 2025	139	010
13 Jul 2025	142	014
14 Jul 2025	146	016

Régions solaires actives et éruptions solaires

Solar flaring activity was moderate over the past 24 hours, with 2 M-class flare identified. The largest flare was a M2.37 flare peaking on July 12 at 08:30 UTC, which was produced by SIDC Sunspot Group 553 (NOAA Active Region 4140). A total of 6 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Group 522 (NOAA Active Region 4136) is the largest region on disk and has a Beta-Gamma-Delta magnetic configuration SIDC. Sunspot Group 553 (NOAA Active Region 4140) has rotated 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 C-class flares expected and M-class flares likely.

Éjection de masse coronale

No Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images.

Trous coronaux

Returning SIDC Coronal Hole 104 (low to mid latitude coronal hole with a positive polarity) started to cross the central meridian on July 08 and is continuing to cross the central meridian.

Vent solaire

Over the past 24 hours the solar wind conditions at Earth were disturbed, due to a high-speed stream (HSS), associated with SIDC Coronal Hole 104. The solar wind speed ranged from 420 km/s to 518 km/s. The total interplanetary magnetic field ranged from 8 nT to 14 nT, with the Bz component reaching a minimum of -9 nT. The phi-angle was mainly in the positive sector (directed away from the Sun), with periods in the negative sector. The solar wind conditions are expected to remain disturbed in the next 24, due to the influence of the HSS.

Géomagnétisme

The geomagnetic conditions over the past 24 hours reached active conditions globally and locally (Kp 4 & K BEL 4). Active conditions are expected for the next 24 hours.

Niveaux de flux de protons

Over the past 24 hours, the greater than 10 MeV GOES proton flux was at background levels and 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 the GOES-18 and GOES-19 satellites, were below the 1000 pfu threshold in the last 24 hours. During the next 24 hours, there’s a chance that the electron flux exceeds the 1000 pfu threshold due to the influence of the HSS. The 24-hour electron fluence was at started the period at moderate levels and decreased to nominal levels. The electron fluence is expected to return to nominal over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 116, sur la base de 17 stations.

Indices solaires pour 11 Jul 2025

Nombre de Wolf, observé par Catania	075
Flux solaire à 10 cm	132
AK Chambon La Forêt	025
AK Wingst	018
Ap estimé	019
Nombre international de taches solaires estimé	096 - 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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