Affichage des archives de vendredi, 26 janvier 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Jan 26 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
26 Jan 2018	070	012
27 Jan 2018	069	015
28 Jan 2018	069	008

Bulletin

Solar activity was at very low levels. The Sun is spotless. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Solar wind became enhanced as the wind speed, initially steady at 420 km/s, started a gradual increase around 01UT to values near 500 km/s by the end of the period. Bz oscillated between -6 and +7 nT (DSCOVR). The interplanetary magnetic field (IMF) was mostly directed towards the Sun. A small negative equatorial coronal hole (CH) is transiting the central meridian.

The geomagnetic field was at quiet to unsettled levels and is expected to remain so during the next few days. An active episode is possible from the moderate speed wind streams associated with the observed CHs.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 09 stations.

Indices solaires pour 25 Jan 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	070
AK Chambon La Forêt	015
AK Wingst	010
Ap estimé	009
Nombre international de taches solaires estimé	000 - Basé sur 13 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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