Affichage des archives de samedi, 3 juin 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jun 03 1230 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
03 Jun 2017	079	017
04 Jun 2017	080	012
05 Jun 2017	080	007

Bulletin

Catania group 29 (NOAA 2661) produced a C8 flare peaking at 17:57UT and several other smaller flares. The region seems to consolidate towards a bipolar structure and further flaring at C level is expected with also a slight change for an M flare. No Earth direct CMEs have been observed in coronagraph data. Proton flux levels are at background values and expected to remain so.

Nominal Solar wind conditions were reported with Solar wind speed 350-370 km/s and total magnetic field under 3nT up till around 7:30UT when total magnetic field became enhanced to over 10nT with also a slight increase in solar wind speed to around 400 km/s. The perturbation also appears associated with a shift of the magnetic field phi angle into the outward magnetic field sector. Currently strong southward Bz with values of -13nT is being recorded. The perturbations could possibly be associated to another small and not very well defined isolated equatorial coronal hole. Perturbed Solar wind conditions could persist associated to the observed Solar wind transient but in general a return to nominal Solar wind conditions is expected over the next days. Geomagnetic conditions were quiet (local K Dourbes 0-2, NOAA Kp 0-2) and are expected to remain so over the next days, with initially some unsettled or active periods possible associated with the recorded Solar wind transient.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 026, sur la base de 15 stations.

Indices solaires pour 02 Jun 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	078
AK Chambon La Forêt	008
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	026 - Basé sur 30 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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