Affichage des archives de jeudi, 27 février 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Feb 27 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
27 Feb 2020	071	010
28 Feb 2020	071	006
29 Feb 2020	071	004

Bulletin

Solar activity was at very low levels. The Sun is still spotless, but this may change as two small active regions at resp. latitudes S10 and N25 are about to rotate over the east limb as seen in SDO/AIA and STEREO-A/EUVI imagery. No earth-directed coronal mass ejections (CMEs) have been observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values. Some small and patchy equatorial coronal holes (CHs) are present on the solar disk.

Solar activity is expected to remain at very low levels.

Solar wind conditions were at background levels. Solar wind speed varied steadily between 330 and 370 km/s (ACE). Bz undulated between -5 and +5 nT. The direction of the interplanetary magnetic field (phi angle) was variable. Geomagnetic conditions were at quiet levels, with an unsettled episode (09-12UT) recorded at Dourbes.

Geomagnetic activity is expected to remain mostly at quiet levels, with an isolated unsettled interval remaining possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 13 stations.

Indices solaires pour 26 Feb 2020

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	070
AK Chambon La Forêt	009
AK Wingst	005
Ap estimé	003
Nombre international de taches solaires estimé	000 - Basé sur 24 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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