Affichage des archives de dimanche, 29 septembre 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Sep 29 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
29 Sep 2019	068	018
30 Sep 2019	068	010
01 Oct 2019	068	005

Bulletin

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

There were no Earth-directed Coronal Mass Ejections (CME) observed in coronagraph data.

Proton levels were at background values and are expected to remain so.

The solar wind speed has decreased from 650 and 540 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 5 nT. The Bz ranged between -4 and 4 nT. Geomagnetic conditions ranged between Kp index 2-5 (NOAA) and local K index 1-4 (Dourbes).

The enhanced solar wind conditions experienced are from a high speed stream (HSS) from a recurrent positive polarity coronal hole. The solar wind speeds are now starting to abate and should return to nominal levels in a couple of days.

Geomagnetic conditions are expected to be unsettled, 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 11 stations.

Indices solaires pour 28 Sep 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	067
AK Chambon La Forêt	029
AK Wingst	027
Ap estimé	030
Nombre international de taches solaires estimé	000 - Basé sur 26 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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