Affichage des archives de dimanche, 26 janvier 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Jan 26 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
26 Jan 2020	074	003
27 Jan 2020	074	003
28 Jan 2020	075	004

Bulletin

Solar activity was at very low levels. No significant flares have been recorded. NOAA Active Region 2757 (N03E09) showed some sunspot growth and continued flux emergence and produced A-flaring activity over the period (GOES-16). Another active region with possible spot development has also rotated over the eastern limb (S30E70). A very slow and narrow Coronal Mass Ejection (CME) that may be Earth directed was observed by STEREO-A at 17:54 Jan 25, possibly associated with an extended A-flare at 15:00 from AR2757. There are currently no LASCO observations for this time, however, due to the extremely slow speed it is not expected to have a significant geomagnetic impact. Further analysis will be carried out as the data becomes available. The greater than 10 MeV proton flux was at nominal values. Solar activity is expected to remain at very low levels.

The solar wind speed was at background levels, ranging between 260 and 350 km/s (ACE). The total magnetic field fluctuated between 0 and 7 nT. Bz. The interplanetary magnetic field (phi angle) was predominantly directed away from the Sun (positive sector).

Geomagnetic activity was quiet, with the Kp index (NOAA) and the local k index (Dourbes) recording values of between 0 and 2. Quiet conditions are expected on Jan 26-28.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 020, sur la base de 13 stations.

Indices solaires pour 25 Jan 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	073
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	011 - Basé sur 09 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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