Affichage des archives de jeudi, 21 février 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Feb 21 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
21 Feb 2019	071	014
22 Feb 2019	070	012
23 Feb 2019	070	006

Bulletin

Solar activity was at very low levels. The LASCO/C2 coronagraphic images now clearly indicate that the coronal mass ejection (CME) associated with yesterday's (20 February) filament eruption had no earth-directed component. A new eruption/restructuring of the filament, located near N10W12, started around 08:00 UT and was still in progress. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Around 14UT, the solar wind speed started a gradual increase from 300 km/s to its current values near 450 km/s (DSCOVR) in response to the arrival of the co-rotating interaction region (CIR) and wind stream associated with the positive polarity coronal hole (CH). Bz oscillated between -8 and +10 nT. The interplanetary magnetic field was directed away from the Sun (positive sector) for the second half of the period. Geomagnetic activity was at quiet to unsettled levels, with Kp recording an isolated active period during the 06-09UT interval.

Mostly quiet to unsettled geomagnetic conditions are expected in response to the wind stream from the positive polarity CH, with an isolated active episode remaining possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 14 stations.

Indices solaires pour 20 Feb 2019

Nombre de Wolf, observé par Catania	015
Flux solaire à 10 cm	071
AK Chambon La Forêt	008
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	000 - Basé sur 25 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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