Affichage des archives de jeudi, 20 juin 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Jun 20 1248 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
20 Jun 2024	197	012
21 Jun 2024	197	017
22 Jun 2024	197	017

Régions solaires actives et éruptions solaires

Solar flaring activity over the last 24 hours has been at low levels besides the number of complex sunspot groups currently visible of the disc, with only multiple C-class flares. The larger flare was a C7.2 flare peaking at 09:39 UTC from the originated from NOAA active region 3719. The solar flaring activity is expected to be at low to moderate levels over the next 24 hours, with C-class flares expected, M-class flares possible and a small chance of X-class flares.

Éjection de masse coronale

No Earth-directed coronal mass ejection (CME) was observed in SOHO/LASCO-C2 coronographe images over the last 24 hours.

Trous coronaux

A large north midlatitude coronal hole with negative polarity, which has crossed the central meridian on June 18 is still facing Earth.

Vent solaire

Solar wind conditions were enhanced in the last 24 hours due to the high-speed stream from the equatorial and positive polarity coronal hole. The solar wind speed decreased from around 575 km/s to 463 km/s. The interplanetary magnetic field remained below 6 nT and the Bz component varied between -5 nT and 5 nT. The solar wind conditions are expected returned to a slow solar wind speed today, then the high-speed stream from the large midlatitude north coronal hole with negative polarity is expected to reach Earth in the next 24-36 hours.

Géomagnétisme

Geomagnetic conditions were quiet to unsettle with short a period of active conditions observed by the local stations in Belgium (NOAA Kp 0-2, K BEL 1-4) in response to the high-speed stream from the equatorial, positive polarity coronal hole and the Bz component being negative for a longer period. Mostly quiet conditions are expected over the next 24 hours. Then active conditions to minor storm may be observed in response of the high-speed stream from the large north midlatitude north coronal hole in about 24-36 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux was below the threshold level over the past 24 hours. It is expected to remain below the threshold level and decrease over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux was below the threshold level in the last 24 hours and is expected to remain so over the next 24 hours. The 24h electron fluence is presently at normal levels and is expected to remain so over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 167, sur la base de 13 stations.

Indices solaires pour 19 Jun 2024

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	196
AK Chambon La Forêt	014
AK Wingst	014
Ap estimé	013
Nombre international de taches solaires estimé	154 - Basé sur 24 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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