Affichage des archives de mardi, 28 novembre 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Nov 28 1230 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
28 Nov 2023	177	006
29 Nov 2023	173	005
30 Nov 2023	165	004

Régions solaires actives et éruptions solaires

Solar flaring activity was low during the past 24 hours. The brightest flare was a C6 from NOAA Active Region (AR) 3500 (magnetic configuration Beta-Gamma, Catania group 65) that peaked yesterday, 18:53 UTC. More C-class flaring activity is expected with a small chance of an isolated M-class flare in the next 24 hours.

Éjection de masse coronale

A partial halo Corona Mass Ejection (CME) can be seen in LASCO-C2/SOHO images starting from yesterday 18:48 UTC. It is expected to be geo-effective and arrive on 1 Dec. Another CME associated with a filament eruption can be seen in LASCO-C2/SOHO images starting from 23:48 UTC, yesterday. Based on the location and extent of the filament, it is expected to arrive at Earth's environment early on Dec 1. These two events, together with the possible arrival of a CME reported yesterday, are likely to merge together and cause a strong single effect in the first half of 1 Dec.

Vent solaire

The Solar Wind (SW) conditions remained stable during the last 24 hours. The SW speed varied from 420 to 510 km/s, while the total interplanetary magnetic field (Bt) was between 3 and 6 nT. The North-South magnetic component (Bz) ranged between -5 and 4 nT, while the interplanetary magnetic field phi angle was mostly directed away from the Sun in the past 24 hours. The SW conditions are expected to remain in the slow SW regime for the next 24 hours.

Géomagnétisme

Geomagnetic conditions were quiet globally (NOAA Kp 1+ to 2+) and quiet to unsettled locally (K BEL 1-3) during the last 24 hours. They are expected to be at quiet levels both globally and locally in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux was at nominal levels 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 the GOES-16 satellite, was at nominal levels during the last 24 hours and is expected to remain below the 1000 pfu 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 : 148, sur la base de 21 stations.

Indices solaires pour 27 Nov 2023

Nombre de Wolf, observé par Catania	215
Flux solaire à 10 cm	187
AK Chambon La Forêt	016
AK Wingst	008
Ap estimé	008
Nombre international de taches solaires estimé	166 - Basé sur 11 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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