Affichage des archives de vendredi, 17 février 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Feb 17 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
17 Feb 2017	074	017
18 Feb 2017	074	021
19 Feb 2017	074	022

Bulletin

In the past 24 hours, no C flares were observed. Very low solar activity (no C flares) is expected in the next 24 hours. The solar wind near Earth is under the influence of a high speed stream by a positive coronal hole. In the past 24 hours, solar wind speed measured by DSCOVR rose from about 375 km/s to about 500 km/s, as the solar wind from the broader part of the coronal hole arrived at Earth. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 2 and 13 nT, with current values around 6 nT. There were a few short intervals with negative Bz, down to -9 nT. Quiet to active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2 and 4) were registered in the past 24 hours. Due to the influence of the high speed stream, quiet to active geomagnetic levels (K Dourbes < 5) are expected on February 17, 18 and 19, with possible minor storm episodes (K Dourbes = 5).

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 15 stations.

Indices solaires pour 16 Feb 2017

Nombre de Wolf, observé par Catania	025
Flux solaire à 10 cm	074
AK Chambon La Forêt	019
AK Wingst	008
Ap estimé	008
Nombre international de taches solaires estimé	012 - Basé sur 35 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

<< Aller à l'aperçu quotidien