Affichage des archives de samedi, 17 mars 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Mar 17 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
17 Mar 2018	068	024
18 Mar 2018	068	029
19 Mar 2018	068	012

Bulletin

Solar X ray flux remained below B level. NOAA active region 2701 decayed shortly after emerging but meanwhile a new, yet unnumbered, bipolar region is forming around N20W33. Solar X-ray flux is still expected to remain below C level.

No Earth directed CMEs have been observed in coronagraph data.

Proton flux levels were at background values and are expected to remain so.

Solar wind remained enhanced with solar wind speed first declining to around 420km/s before increasing again to around 500 km/s currently. Total magnetic field reached a maximum of 13nT in the afternoon of March 16 but meanwhile declined to nominal values of around 5nT. The magnetic field phi angle was steady in the negative sector. Enhanced solar wind conditions are expected to continue at least today and into tomorrow under the influence of the negative polarity coronal hole in the northern hemisphere.

Geomagnetic conditions were quiet to active (local K Dourbes 1-4, NOAA Kp 3-4). Active geomagnetic conditions are still to be expected today and tomorrow.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 04 stations.

Indices solaires pour 16 Mar 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	069
AK Chambon La Forêt	037
AK Wingst	022
Ap estimé	024
Nombre international de taches solaires estimé	000 - 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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