Affichage des archives de samedi, 2 décembre 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Dec 02 1231 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
02 Dec 2023	173	015
03 Dec 2023	168	021
04 Dec 2023	163	011

Régions solaires actives et éruptions solaires

Solar flaring activity was moderate during the past 24 hours with an M1 flare from NOAA Active Region (AR) 3500 (magnetic configuration Beta-Gamma, Catania group 65) detected yesterday at 21:20 UTC. Most of the frequent C-class flaring activity was emitted from NOAA AR 3500 and NOAA AR 3492 (magnetic type Beta, Catania group 58). C-class flaring activity is highly expected in the next 24 hours. Isolated M-class flares are possible and there is a small chance of an X-class flare.

Éjection de masse coronale

A partial halo Coronal Mass Ejection (CME) can be seen in LASCO-C2/SOHO images starting from yesterday 22:12 UTC. It is likely to be geo-effective and arrive at the first half of 5 Dec. A partial halo CME that can also been seen in LASCO-C2/SOHO images as lunched yesterday 03:12 UTC is associated with a flare on the west solar limb and is not expected to be geo-effective.

Vent solaire

The Solar Wind (SW) conditions are in the process of returning to a typical slow SW regime. The SW speed gradually dropped from 540 km/s to 450 km/s during the last 24 hours. The total interplanetary magnetic field (Bt) dropped from 27 nT during the height of the disturbance to 5 nT. The North-South magnetic component (Bz) varied between -19 and 27 nT during the Coronal Mass Ejection (CME) arrival, but it has lately stabilised to around 5 nT. The interplanetary magnetic field phi angle was predominantly directed towards the Sun during the past 24 hours. The SW conditions are expected to be affected by another CME arrival in the next 24 hours.

Géomagnétisme

Geomagnetic conditions dropped from moderate storm conditions (NOAA Kp and K BEL 6) yesterday at 12:00-15:00 UTC to quiet conditions (NOAA Kp 2, K BEL 1) today at 09:00-12:00 UTC. They are expected to increase again to active or minor storm conditions in the next 24 hours as a result of the expected arrival of another Coronal Mass Ejection (CME).

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 below the 1000 pfu alert threshold during the last 24 hours and is expected to to remain below this threshold during the next 24 hours. The 24h electron fluence was at 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 : 111, sur la base de 07 stations.

Indices solaires pour 01 Dec 2023

Nombre de Wolf, observé par Catania	156
Flux solaire à 10 cm	162
AK Chambon La Forêt	062
AK Wingst	034
Ap estimé	042
Nombre international de taches solaires estimé	133 - Basé sur 06 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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