Affichage des archives de dimanche, 17 mai 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 May 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 May 2020	070	004
18 May 2020	070	007
19 May 2020	070	007

Bulletin

The Sun was spotless. Solar activity was at very low levels. Two small active regions have rotated over the east limb. Based on their latitudes (resp. at N32 and S23) and STEREO-A/EUVI imagery, these are not the return of former ARs NOAA 2762 and 2761 but genuinely new regions. However, they are currently spotless and were the sources of only some minor A-class flaring. Solar activity is expected to stay at very low levels, with a small chance on an isolated C-class flare.

The greater than 10 MeV proton flux and the greater than 2 MeV electron flux were at nominal levels during the last 24 hours and are expected to remain so.

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

Solar wind speed varied between 290 and 330 km/s, ending the period near 300 km/s. Bz oscillated between -3 and +4 nT (DSCOVR). The direction of the interplanetary magnetic field (phi angle) was in a predominately positive orientation (away from the Sun).

Geomagnetic activity was at quiet levels, with an unsettled interval recorded by Dourbes (14-17UT). Geomagnetic conditions are expected to be mostly quiet with an occasional unsettled episode possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 25 stations.

Indices solaires pour 16 May 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	069
AK Chambon La Forêt	///
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	000 - Basé sur 26 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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