Affichage des archives de mardi, 26 février 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Feb 26 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
26 Feb 2019	070	004
27 Feb 2019	070	019
28 Feb 2019	070	021

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. No significant Active Regions (AR) or filament channels are present on the solar disk. The greater-than 10 MeV proton flux was at nominal values. A negative polarity equatorial coronal hole (CH) has reached W45S15.

Solar activity is expected to remain at low levels.

The solar wind speed has fluctuated between 320 and 340 km/s (DSCOVR) over the past 24 hours. The total magnetic field strength has fluctuated around 4 nT (DSCOVR). The Bz component fluctuated around 0 nT, ranging between -2 and +4 nT. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours. A negative polarity coronal hole is currently positioned near W45S15 in the Western hemisphere of the Sun and the associated co-rotating interaction region (CIR) and high-speed stream (HSS) may enhance solar wind speeds towards the end of the day and for the next few days, as a consequence geomagnetic activity is expected to reach to active conditions.

Geomagnetic conditions are expected to be unsettled and possibly active from later today / early tomorrow.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 24 stations.

Indices solaires pour 25 Feb 2019

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	070
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	001
Nombre international de taches solaires estimé	000 - 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

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