Affichage des archives de dimanche, 11 mars 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Mar 11 1234 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
11 Mar 2018	068	029
12 Mar 2018	068	011
13 Mar 2018	068	007

Bulletin

Solar X ray flux remained below B level and with no spotted regions on the visible disk chances for any flare occurrences remain very low.

No new Earth directed CMEs have been observed in coronagraph data.

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

Solar wind showed until around midnight the continued passage of the magnetic cloud leaving the Sun on March 6. While Bz became positive and the magnetic field phi angle showed a further gentle rotation of the magnetic field, Solar wind speed declined to a minimum of 370 km/s by midnight. After midnight, Solar wind increased again to 450 km/s presently, while total magnetic field steadily recovered to a nominal 3nT with Bz variable and the magnetic field phi angle again stable in the positive sector. Further Solar wind perturbations may be encountered in the next 24 hours, with also possibly the arrival of the ejecta of March 7. Afterwards, Solar wind conditions should slowly return to nominal with later the influence of the high speed stream of the elongated coronal hole expected from March 14 onwards.

Geomagnetic conditions were quiet to unsettled (NOAA Kp 1-3). Geomagnetic conditions could still see active periods associated to a possible weak CME arrival, but should mainly be quiet to unsettled from March 12 onwards.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 18 stations.

Indices solaires pour 10 Mar 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	012
AK Wingst	012
Ap estimé	013
Nombre international de taches solaires estimé	000 - Basé sur 19 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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