Affichage des archives de samedi, 23 avril 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Apr 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 Apr 2016	077	007
24 Apr 2016	079	007
25 Apr 2016	081	007

Bulletin

Quiet solar weather conditions were observed without any significant flaring activity. The X-ray flux remained below the C level. Catania sunspot group 59 (NOAA active region 2532) dissolved while Catania group 60 (NOAA active region 2533) remained a simple unipolar spot. Quiet conditions are expected over the next days with a very low probability for C flares. No Earth directed CME's have been observed.

The rise in the total interplanetary magnetic field strength that was observed at the end of the previous reporting period persisted and was accompanied by an increase of also the solar wind speed just after the start of the reporting period, thus marking the expected arrival of the influence of the high speed stream from the transequatorial coronal hole. The solar wind speed reached a maximum of just over 600 km/s after 19:00UT. The total magnetic field reached a maximum of around 14 nT early in the period. The Bz component was mostly positive but reached some strongly negative values of around -12 nT also early in the period. The magnetic field phi angle indicated a positive sector. Solar wind conditions have meanwhile decayed to nominal with speed around 420 km/s and magnetic field around 5nT. Solar wind conditions or expected to continue to be at nominal levels.

Geomagnetic conditions were quiet to active with only unsettled conditions locally (local K Dourbes 1-3) and a single active period at planetary level (NOAA Kp reached 4 for the 21-24UT interval). Quiet geomagnetic conditions are expected over the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 014, sur la base de 15 stations.

Indices solaires pour 22 Apr 2016

Nombre de Wolf, observé par Catania	024
Flux solaire à 10 cm	077
AK Chambon La Forêt	019
AK Wingst	020
Ap estimé	018
Nombre international de taches solaires estimé	018 - Basé sur 29 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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