Affichage des archives de samedi, 18 novembre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Nov 18 1230 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
18 Nov 2017	076	009
19 Nov 2017	077	014
20 Nov 2017	076	013

Bulletin

There are presently 2 numbered sunspot groups on the visible side of the solar disc, Catania sunspot group 63 (NOAA AR 2687) and group 64 (NOAA AR 2688). Solar flaring activity remains to be low without C-class flares reported. We expect such a low flaring activity to persist, isolated low C-class flares are possible but not very probable (probability of only about 10%). There were no Earth directed CMEs reported, and the solar protons remained at background level. The solar wind speed is presently about 410 km/s and the interplanetary magnetic field magnitude is about 4 nT. The fast solar wind associated with the large equatorial coronal hole (reached central meridian in the early morning of November 16) is expected to arrive at the Earth in the afternoon of November 19. The arrival of this fast flow might be preceded with the solar wind speed increase expected to start later today (associated with the low latitude extension of the southern polar coronal hole which reached central meridian in the late evening of November 13). The geomagnetic conditions are presently quiet, we expect unsettled to active geomagnetic conditions tomorrow due to the arrival of the fast solar wind.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 015, sur la base de 12 stations.

Indices solaires pour 17 Nov 2017

Nombre de Wolf, observé par Catania	031
Flux solaire à 10 cm	076
AK Chambon La Forêt	008
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	023 - Basé sur 32 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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