Affichage des archives de lundi, 23 septembre 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Sep 23 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
23 Sep 2019	068	014
24 Sep 2019	067	021
25 Sep 2019	067	013

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, HAO- kCOR ground-based coronagraph observations (around 18:00 UT on 22-Sep-2019) combined with 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 been slowly decreasing from around 350 to 300 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 5 nT. The Bz component has been largely positive, fluctuating between -2 and 5 nT. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours.

Solar wind conditions are expected to increase at the end of the day, and then become enhanced over the following 24 hours due to a high speed stream (HSS) from a recurrent equatorial coronal hole. The solar wind speed is anticipated to reach speeds exceeding 500 km/s.

Geomagnetic conditions are expected to become unsettled around the end of 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 19 stations.

Indices solaires pour 22 Sep 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	005
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	000 - Basé sur 22 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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