Affichage des archives de vendredi, 30 octobre 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Oct 30 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
30 Oct 2020	085	007
31 Oct 2020	083	007
01 Nov 2020	081	007

Bulletin

The two active regions (ARs) visible on the disk NOAA AR 2778 and 2779 have decayed in complexity and size. Four C-class flares were observed from AR 2779, the largest was a C4.3 peaking at 11:50 UT on 29 October (partially reported yesterday). More C-class flares can be expected, and M-class flares remain possible but less likely.

No Earth directed CME was observed in the past 24 hours.

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 are above the 10^3 pfu threshold. The electrons are expected to descend below the threshold in the next 24 hours.

The speed of the solar wind decreased from 465 to 435 km/s in the past 24 hours. Bz was never below -5 nT and B reached 6 nT. The solar wind speed is expected to remain at low speeds over the next 24 hours.

The geomagnetic conditions reached active levels both locally and globally (KDourbes = 4, Kp = 4). Mostly quiet to unsettled conditions can be expected in the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 031, sur la base de 10 stations.

Indices solaires pour 29 Oct 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	085
AK Chambon La Forêt	021
AK Wingst	014
Ap estimé	014
Nombre international de taches solaires estimé	037 - Basé sur 16 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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