Affichage des archives de jeudi, 31 janvier 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Jan 31 1242 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
31 Jan 2019	074	017
01 Feb 2019	072	025
02 Feb 2019	070	011

Bulletin

No C-class flares in the past 24 hours, NOAA AR 2733 rotated over the west limb. There are no active regions visible. Eight B-class flares were observed (still from NOAA AR 2733), the strongest one was a B9.7 flare peaking at 17:05 UT on 30 January. Low solar activity is expected.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 350 km/s with interplanetary magnetic fields of 14 nT. Geomagnetic conditions have been quiet. Solar wind density, speed, temperature and magnetic field have been increasing since last night, together with a sector boundary crossing (from positive to negative magnetic field polarity), marking the arrival of the fast solar wind associated with a negative polarity equatorial coronal hole. Disturbed geomagnetic conditions (most likely up to K=5) are expected for the next 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 16 stations.

Indices solaires pour 30 Jan 2019

Nombre de Wolf, observé par Catania	012
Flux solaire à 10 cm	074
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	000 - 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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