Affichage des archives de lundi, 11 mars 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Mar 11 1250 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 2019	071	007
12 Mar 2019	071	035
13 Mar 2019	071	013

Bulletin

The only region on disk: Catania group 9 (NOAA region 2734) was quiet and seems to be in decay. Overall probability for flaring at C level remains low.

No new CME's have been detected in coronagraph data.

The Solar proton flux levels were at background values and expected to remain so.

An equatorial negative polarity coronal hole has passed the central meridian overnight, with it's fast speed stream expected to become geo- effective from midnight March 13/14.

Solar wind conditions mainly continued to be in decay with solar wind speed decreasing from around 400 km/s to currently around 350 km/s. Total magnetic field was at a nominal 5-6nT with a varying Bz. The phi angle was in the negative sector until around 15:40UT when it switched into the positive sector. Solar wind conditions are expected to become enhanced with the arrival of the March 8 CME by noon tomorrow March 12. Given the slow speed of the CME, it's effects on the solar wind conditions may well remain limited though.

Geomagnetic conditions were quiet (both NOAA Kp and local K Dourbes 0-2) but may become enhanced with the expected CME arrival. Active conditions must thus be anticipated with a possibility of minor geomagnetic storms occurring.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 21 stations.

Indices solaires pour 10 Mar 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	004
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	011 - Basé sur 22 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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