Affichage des archives de jeudi, 5 octobre 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Oct 05 1242 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
05 Oct 2023	153	010
06 Oct 2023	153	012
07 Oct 2023	153	007

Régions solaires actives et éruptions solaires

Solar flaring activity over the past 24 hours was quiet with only one small C-class flare beside the number of complex regions on the solar disc visible from Earth. There are currently 8 numbered active regions with alpha or beta magnetic field configurations. The solar flaring activity is likely to be at quiet levels over the coming days with C-class flares expected, and a low chance for isolated M-class flares and X-class flaring.

Éjection de masse coronale

No Earth-directed Coronal Mass Ejections (CME) have been detected in the last 24 hours in the available SOHO/LASCO images.

Vent solaire

In the last 24 hours, the solar wind conditions near Earth were enhanced due to the arrival of solar wind streams associated to 2 small positive polarity coronal holes that crossed the central meridian on October 01 and 02. The total interplanetary magnetic field was ranging between 5.0 nT and 9.1 nT. The Bz-component of the interplanetary magnetic showed mainly negative values with a minimum value of -7.9 nT. The solar wind speed had values varying between 388 km/s and 478 km/s. The phi-angle was in the positive sector (directed away from the Sun). The solar wind is expected to remain slightly enhanced before returning to nominal conditions.

Géomagnétisme

The geomagnetic conditions over the past 24 hours were unsettled locally (K Bel 3) and active (Kp-NOAA 4) due to the enhanced solar wind conditions. Quiet to unsettled conditions are expected in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux was at background levels over the last 24 hours. It is expected to remain at background levels.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux measured by GOES-16 was below the 1000 pfu threshold. The greater than 2 MeV electron flux is expected remains below the threshold in the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain at normal levels in the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 170, sur la base de 14 stations.

Indices solaires pour 04 Oct 2023

Nombre de Wolf, observé par Catania	206
Flux solaire à 10 cm	155
AK Chambon La Forêt	032
AK Wingst	012
Ap estimé	012
Nombre international de taches solaires estimé	159 - Basé sur 24 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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