Affichage des archives de mardi, 31 janvier 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jan 31 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
31 Jan 2017	077	021
01 Feb 2017	076	016
02 Feb 2017	077	015

Bulletin

Over the past 24 hours solar activity has been very low. No significant flares have been recorded. All Active Regions (ARs) have shown low levels of activity, however AR 2629 has shown some evidence of flux emergence and cancellation, which may increase flaring activity over the next couple of days. No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares and a very low probability of M-class flares. A large negative polarity trans-equatorial coronal hole extending from the Southern pole has moved into the Western hemisphere. The solar wind speed has increased from around 420 to 680 km/s over the past 24 hours, and jumped to around 650 km/s around 07:00 UT this morning. The total magnetic field strength has increased around 10 nT to 17 nT. The Bz component fluctuated between -10 and +10 nT. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours. The large negative polarity trans-equatorial coronal hole extending from the Southern pole is the likely cause of the increased solar wind speeds experienced at the Earth yesterday evening and this morning, as a consequence Geomagnetic conditions have increased, reaching K index (Dourbes) 4 this morning. Active geomagnetic conditions are expected to persist for the next couple of days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 034, sur la base de 10 stations.

Indices solaires pour 30 Jan 2017

Nombre de Wolf, observé par Catania	038
Flux solaire à 10 cm	077
AK Chambon La Forêt	015
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	033 - Basé sur 21 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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