Affichage des archives de mardi, 23 juillet 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Jul 23 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
23 Jul 2019	068	007
24 Jul 2019	068	008
25 Jul 2019	068	008

Bulletin

The solar activity has been quiet over the past 24 hours. The small bipolar sunspot on the solar disc (NOAA Active region 2745, Catania sunspot group 21) has decayed and disappeared. The sun is currently spotless and the X-ray flux remained below B-level. Solar activity is expected to remain at low levels for the next 24 hours.

No Earth directed coronal mass ejections (CME) were observed over the last 24 hours in the available coronagraph imagery. The greater than 10 MeV proton flux remained at background levels over the past 24 hours and is expected to remain at low levels.

The solar wind speed was stable with values around 400 km/s (ACE). The total interplanetary magnetic field remained below 7 nT , the Bz component varied between -4 nT and +5 nT. The solar wind parameters might show some small enhancement for the coming days due to the possible effect of the South pole coronal hole wind streams.

Quiet to unsettle geomagnetic conditions were observed with the Kp index (NOAA) ranging between 1-2 and the local K index (Dourbes) ranging between 1-3 over the past 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 22 stations.

Indices solaires pour 22 Jul 2019

Nombre de Wolf, observé par Catania	014
Flux solaire à 10 cm	067
AK Chambon La Forêt	016
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	013 - Basé sur 25 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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