Affichage des archives de samedi, 2 octobre 2021

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2021 Oct 02 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
02 Oct 2021	091	007
03 Oct 2021	091	007
04 Oct 2021	091	007

Bulletin

Two active regions (ARs) present on the visible solar disk. NOAA AR 2877 (beta-gamma magnetic field configuration) and 2880 (beta). No C-class flares were observed in the last 24 hours, although they remain possible.

No Earth directed CMEs have been observed in the last 24 hours.

The greater than 10 MeV proton flux was at background levels in the past 24 hours, and is expected to stay there in the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold, it may increase over the next 24 hours. The electron fluence was at normal levels over the past 24 hours, it may increase over the next 24 hours.

The solar wind data at L1 shows the passage of a magnetic cloud starting at 12:30 UT on 1 October, most likely still related to the CME from 28 September. The orientation of the cloud axis is WNE, meaning positive helicity, right handed chirality, with a source location statistically corresponding to the southern hemisphere (as observed). Magnetic field intensity increased to 13 nt (with positive Bz) and solar wind speed decreased from 520 to 440 km/s. Slow solar wind conditions can be expected for the next 24 hours.

Geomagnetic conditions reached active levels (NOAA Kp and K Dourbes 1-4) over the past 24 hours. Quiet to unsettled conditions are expected for the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 029, sur la base de 08 stations.

Indices solaires pour 01 Oct 2021

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	091
AK Chambon La Forêt	015
AK Wingst	013
Ap estimé	014
Nombre international de taches solaires estimé	034 - 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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