Affichage des archives de vendredi, 17 avril 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Apr 17 1231 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
17 Apr 2020	069	007
18 Apr 2020	068	009
19 Apr 2020	069	008

Bulletin

The Sun was spotless again. Solar activity was at very low levels and is expected to remain so.

The greater than 10 MeV proton flux and the greater than 2 MeV electron flux were at nominal values and are expected to remain so.

No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery.

Solar wind speed was on a mostly declining trend, varying between 370 and 300 km/s and ending the period with low values around 310 km/s (DSCOVR). Bz varied between -4 and +3 nT, being mostly negative since 06UT. The direction of the interplanetary magnetic field (phi angle) was in a predominantly sunward orientation (negative sector).

Geomagnetic activity was at quiet levels, with an isolated unsettled episode recorded by Dourbes during the 15-18UT interval. Geomagnetic conditions are expected to be quiet to unsettled during the next few days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 27 stations.

Indices solaires pour 16 Apr 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	069
AK Chambon La Forêt	007
AK Wingst	006
Ap estimé	004
Nombre international de taches solaires estimé	000 - Basé sur 34 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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