Affichage des archives de vendredi, 21 juin 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Jun 21 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
21 Jun 2024	204	013
22 Jun 2024	204	021
23 Jun 2024	204	013

Régions solaires actives et éruptions solaires

Solar flaring activity over the last 24 hours has been at moderate levels, with multiple C-class and M-class flares. The largest flare was a M5.8 flare peaking at 23:13 UTC originated from NOAA active region 3719. There are currently six sunspot groups on the disc with NOAA active region 3719 producing the two M-class flares. 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 north coronal hole with negative polarity, which has crossed the central meridian on June 18 is on geoeffective location, now in the west side of the sun.

Vent solaire

Solar wind conditions have returned to slow wind regime in the last 24 hours. The solar wind speed decreased from around 501 km/s to 388 km/s. The interplanetary magnetic field remained below 6 nT and the Bz component varied between -3 nT and 5 nT. The solar wind conditions are expected to remain in a slow solar wind regime. Then the high-speed stream from the large north midlatitude north coronal hole with negative polarity is expected to reach Earth in the next period.

Géomagnétisme

Geomagnetic conditions were quiet (NOAA Kp 0-2, K BEL 1-2). Later, active conditions to minor storm may be observed later in the next period, in response of the high-speed stream from the large north midlatitude north coronal hole.

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 : 148, sur la base de 12 stations.

Indices solaires pour 20 Jun 2024

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	203
AK Chambon La Forêt	013
AK Wingst	009
Ap estimé	007
Nombre international de taches solaires estimé	163 - 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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