Affichage des archives de mardi, 24 septembre 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Sep 24 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
24 Sep 2019	066	016
25 Sep 2019	066	011
26 Sep 2019	066	016

Bulletin

Solar X-ray flux remained below B class levels throughout the period. The Solar disk is spotless and X-ray flux is expected to remain at or below background levels.

There are currently no SoHO-LASCO coronagraph observations available, STEREO-A COR coronagraph and SDO-AIA EUV observations indicate no Earth- directed CMEs (Coronal Mass Ejection) were produced. Without LASCO data to corroborate the absence of a CME, these observations should be treated with caution, with the small possibility of an unobserved Earth directed CME having been produced.

Proton levels were at background values and are expected to remain so. The solar wind speed has fluctuated between 300 and 350 km/s over the past 24 hours. The total magnetic field strength has fluctuated between 3 and 7 nT. The Bz between -6 and 5 nT. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 0-2 (Dourbes).

Solar wind conditions are expected to be enhanced over the next 24 hours due to a high speed stream (HSS) from a recurrent equatorial coronal hole. The solar wind speed may reach speeds exceeding 500 km/s.

Geomagnetic conditions are expected to become unsettled throughout the day, with some active periods due to HSS solar wind enhancements.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 14 stations.

Indices solaires pour 23 Sep 2019

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	066
AK Chambon La Forêt	010
AK Wingst	004
Ap estimé	002
Nombre international de taches solaires estimé	000 - Basé sur 23 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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