Affichage des archives de jeudi, 21 mars 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Mar 21 1232 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
21 Mar 2024	181	007
22 Mar 2024	178	003
23 Mar 2024	175	003

Régions solaires actives et éruptions solaires

During the last 24 hours the solar flaring activity was moderate with an M1 flare produced by NOAA Active Region (AR) 3615 (magnetic configuration Beta-Gamma-Delta, Catania sunspot group 22) yesterday 22:55 UTC. The same AR produced all the C-class flaring of the last 24 hours and it has now started to decay. Isolated M-class flaring activity is possible in the next 24 hours, mostly from NOAA AR 3615.

Éjection de masse coronale

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours. A partial halo CME launched yesterday at 17:36 UTC can been seen in LASCO-C2/SOHO images. It is estimated to be a back-sided event and hence not geo-effective.

Trous coronaux

A southern, negative polarity Coronal Hole (CH) is currently crossing the solar central meridian. A High Speed Stream (HSS) associated with this CH is expected to affect the Earth's environment on Mar 24.

Vent solaire

During the past 24 hours the Solar Wind (SW) conditions were affected by the expected arrival of a Coronal Mass Ejection (CME) today at 01:50 UTC. The SW speed increased from 300 to 400 km/s as a result of the arrival, while the total interplanetary magnetic field (Bt) raised from 1 to 15 nT. The North-South magnetic component (Bz) ranged between -11 and 8 nT, while the interplanetary magnetic field phi angle changed from being directed towards the Sun to be directed away from the Sun. The effects of the CME are expected to wane in the next 24 hours and the conditions to return to a slow SW regime.

Géomagnétisme

During the last 24 hours, geomagnetic conditions were globally and locally quiet to unsettled (NOAA Kp 0+ to 3+ and K BEL 1 to 3) as a result of the arrival of a Coronal Mass Ejection (CME) today 01:50 UTC. In the next 24 hours they are expected to drop to quiet levels.

Niveaux de flux de protons

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is likely 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 the GOES-16 satellite, was at nominal levels during the last 24 hours and is expected to remain below this threshold during the next 24 hours. The 24h electron fluence was at very low levels during the past 24 hours and is expected to remain at these levels for the following 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 174, sur la base de 08 stations.

Indices solaires pour 20 Mar 2024

Nombre de Wolf, observé par Catania	147
Flux solaire à 10 cm	176
AK Chambon La Forêt	013
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	126 - Basé sur 20 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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