Affichage des archives de vendredi, 22 février 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Feb 22 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
22 Feb 2019	070	005
23 Feb 2019	070	006
24 Feb 2019	070	003

Bulletin

Solar activity was at very low levels. The dynamic filament, now located near N15W20, has grown to a length of about 20 degrees. No earth- directed coronal mass ejections (CMEs) have been observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values. A negative polarity equatorial coronal hole has started its transit of the central meridian.

Solar activity is expected to remain at very low levels.

The earth environment remained under the influence of the wind stream from the positive polarity coronal hole (CH). Solar wind speed was fairly steady, varying mostly between 440 and 470 km/s with a 1-hour high near 500 km/s shortly after midnight (DSCOVR). Bz oscillated between -5 and +6 nT. The interplanetary magnetic field was directed away from the Sun (positive sector) until 06UT, moving into a negative sector afterwards. Geomagnetic activity was at quiet to unsettled levels.

Mostly quiet to unsettled geomagnetic conditions are expected, with a waning chance on an isolated active episode.

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

Indices solaires pour 21 Feb 2019

Nombre de Wolf, observé par Catania	013
Flux solaire à 10 cm	071
AK Chambon La Forêt	020
AK Wingst	013
Ap estimé	013
Nombre international de taches solaires estimé	000 - Basé sur 21 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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