Affichage des archives de mercredi, 17 juin 2026

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 Jun 17 1231 UTC

Prévisions SIDC

Éruptions solaires

C-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
17 Jun 2026	113	014
18 Jun 2026	113	007
19 Jun 2026	113	013

Régions solaires actives et éruptions solaires

A total of 5 numbered sunspot groups were identified on the disk over the past 24 hours. They all have simple alpha or beta magnetic field configuration, and have only produced minor C-class flaring in the past 24 hours. The largest flare was a C1.2 flare peaking on June 17 at 05:20 UTC, which was produced by SIDC Sunspot Group 870 (NOAA Active Region 4465).

Éjection de masse coronale

No Earth-directed CMEs were observed in the last 24 hours.

Trous coronaux

SIDC Coronal Hole 168 (equatorial coronal hole with a positive polarity) crossed the central meridian on June 13 and is now positioned on the western side of the Sun. SIDC Coronal Hole 169 (equatorial coronal hole with a positive polarity) is currently crossing the central meridian.

Vent solaire

The ICME corresponding to the 12 June CME arrived to the Earth early on 17 June. As expected, the effect of the ICME was weak with a magnetic field reaching 12 nT (with Bz mostly positive) and a speed around 415 km/s. The arrival of a fast solar wind stream, from SIDC Coronal Hole 168 could be expected in the next 24 hours; however, due to the coronal hole's limited size, any impact is expected to be mild.

Géomagnétisme

Geomagnetic conditions were quiet at planetary levels (Kp up to 2.33) and reached unsettled conditions at local levels (K_Bel up to 3). The possible arrival of a mild high speed stream may increase geomagnetic conditions.

Niveaux de flux de protons

The greater than 10 MeV proton flux, as measured by GOES-18, was below the 10 pfu threshold level over the past 24 hours and is expected to remain so for the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux, as measured by GOES-18 and GOES-19 was slightly above the 1000 pfu alert threshold in the past 24 hours. The flux is expected to fluctuate around the alert threshold over the next 24 hours. The 24-hour electron fluence was at normal levels over the past 24 hours and is expected to remain at these levels over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 059, sur la base de 17 stations.

Indices solaires pour 16 Jun 2026

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	113
AK Chambon La Forêt	012
AK Wingst	010
Ap estimé	009
Nombre international de taches solaires estimé	079 - Basé sur 21 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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