Affichage des archives de mercredi, 4 novembre 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Nov 04 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
04 Nov 2020	084	007
05 Nov 2020	084	010
06 Nov 2020	084	017

Bulletin

The solar activity was mostly quiet over the past 24 hours. Tow regions are visible in the solar disc seen from Earth (NOAA-AR 2780, and NOAA-AR 2781). NOAA-AR 2780 has decayed, while the second region (NOAA-AR 278) has produced few C1.1-class flare. The solar activity is expected to remain mostly at low levels with a probability of small C-class flare.

No Earth directed Coronal Mass Ejections (CMEs) were observed in the available coronagraphic imagery in the last 24 hours. The all quiet alert has, however, been switched off, as the recent emerge region shows some activity that may include in the future Earth-directed coronal mass ejections.

The greater than 10 MeV proton flux was at background levels over the past 24 hours. It is expected to stay at background levels for the next 24 hours. The greater than 2 MeV electrons flux was below the 10^3 pfu threshold over the past 24 hours. It is expected to remain at low for the next 24 hours as the solar wind parameters are close to nominal levels and then may slightly increase to moderate levels slightly above 10^3 pfu threshold.

The Earth is currently under the influence of the slow solar wind streams. The solar wind parameters (DSCOVR) showed nominal values with the solar wind speed was below 400 km/s, the total interplanetary magnetic field below 5 nT, and the Bz magnetic field components fluctuating between -3.3 nT and 3 nT. The solar wind parameters may slightly be enhanced later on November 5 due to the influence of the solar wind coming from the south coronal hole that extends up to -30 degree latitude.

Geomagnetic conditions were quiet. Quiet conditions are expected for the next day, then unsettled conditions are expected with the arrival of the enhanced solar wind conditions later on November 5.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 020, sur la base de 19 stations.

Indices solaires pour 03 Nov 2020

Nombre de Wolf, observé par Catania	018
Flux solaire à 10 cm	083
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	014 - Basé sur 21 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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