Affichage des archives de vendredi, 15 mars 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Mar 15 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
15 Mar 2019	070	013
16 Mar 2019	070	021
17 Mar 2019	070	012

Bulletin

X-ray flux remained below B level. With a spotless disk, again X-ray flux is expected to remain below C level.

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

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

An equatorial coronal hole of positive polarity has crossed the central meridian overnight. It may influence the Solar wind from around late March 18.

Solar wind first saw a gradual slight increase of total magnetic field towards 8.5nT with a predominantly negative Bz component (peaking under -6nT) while other parameters remained stable with a Solar wind speed of 340 km/s. At 6:17UT a slow forward shock occurred, with speed jumping to around 400 km/s, while total magnetic field dipped down to around 4.5nT. Solar wind speed is now around 380 km/s. Solar wind conditions may further enhance later in the day under influence of the equatorial coronal hole that crossed central meridian late March 10. Towards March 17 there is a small possibility of some slow CME transients associated to the March 12 CME.

Geomagnetic conditions were quiet to unsettled (both NOAA Kp and local K Dourbes 1-3). Geomagnetic conditions are expected to become unsettled with a possibility for active periods under high speed stream influence.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 12 stations.

Indices solaires pour 14 Mar 2019

Nombre de Wolf, observé par Catania	014
Flux solaire à 10 cm	070
AK Chambon La Forêt	023
AK Wingst	011
Ap estimé	010
Nombre international de taches solaires estimé	007 - 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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