Affichage des archives de dimanche, 1 janvier 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Jan 01 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
01 Jan 2023	165	011
02 Jan 2023	165	007
03 Jan 2023	165	007

Bulletin

Solar flaring activity was low. The largest flare was a C9 flare from NOAA active region 3180, peaking at 21:48UTC. Further C flares originated from NOAA active regions 3176, 3177 and 3179. NOAA active regions 3176 and 3180 remain the most complex regions on disc with a chance for producing M class flaring. Footpoint separation and consolidation was observed in NOAA active region 3179. Flaring at C level is likely with a significant chance for further M class flares.

No new Earth directed CMEs have been observed in coronagraph data.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours and is expected to remain so in the next 24 hours. The greater than 2 MeV electron flux briefly reached over the 1000 pfu threshold and is expected do so again today. The electron fluence was at moderate levels and is expected to be at moderate levels over the next days.

A further enhancement of the high speed solar wind conditions was observed. Solar wind increased to over 600km/s during the first part of the period before starting a slow decline to currently around 530 km/s. The magnitude of the interplanetary magnetic field was around 5nT. The orientation of the magnetic field indicated connection to a positive sector (field away from the Sun) with a variable north-south component (Bz ranging between -6nT to 6nT). Solar wind speed is expected to continue a slow gradual decrease over the next days.

Geomagnetic conditions reached active levels (both NOAA Kp and local K Dourbes 4) before and around midnight, but were otherwise quiet to unsettled. Quiet to unsettled conditions are expected over the next days with periods of active conditions still possible initially.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 109, sur la base de 09 stations.

Indices solaires pour 31 Dec 2022

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	165
AK Chambon La Forêt	023
AK Wingst	018
Ap estimé	018
Nombre international de taches solaires estimé	091 - Basé sur 14 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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