Affichage des archives de mercredi, 25 janvier 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jan 25 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
25 Jan 2017	084	005
26 Jan 2017	083	005
27 Jan 2017	082	031

Bulletin

Solar activity was very low. NOAA 2629, a new sunspot region near the east limb, developed quickly into a mature group and produced a series of B-class flares. The strongest event was a B5 flare peaking at 17:55UT. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Mostly quiet flaring conditions are expected, with a chance on a C-class event in particular from NOAA 2629.

Solar wind speed varied between 310 and 350 km/s (ACE). Bz intensified somewhat and was fluctuating between -6 nT and +6 nT. The interplanetary magnetic field was mostly directed away from the Sun. A small positive equatorial coronal hole (CH) transited the central meridian.

The geomagnetic field was at quiet to unsettled levels and is expected to remain so. The CH's particle stream is expected to arrive at Earth around 27 January and may result in active to minor storming episodes.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 046, sur la base de 05 stations.

Indices solaires pour 24 Jan 2017

Nombre de Wolf, observé par Catania	053
Flux solaire à 10 cm	082
AK Chambon La Forêt	008
AK Wingst	003
Ap estimé	002
Nombre international de taches solaires estimé	043 - Basé sur 14 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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