Affichage des archives de dimanche, 4 juin 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jun 04 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
04 Jun 2017	079	006
05 Jun 2017	080	007
06 Jun 2017	080	007

Bulletin

Catania group 29 (NOAA active region 2661) produced some further C flaring: two C2.5 magnitude flares peaking at 14:56UT and 19:34UT. Dispersion of the magnetic field is observed in the leading part of the region, but there remains mixed polarity field in the middle and trailing portions of the region. Further C flaring should be anticipated with also a slight chance for an isolated M flare. No Earth directed CMEs have been observed in available coronagraph images. Proton flux levels are at background values and are expected to remain so.

Solar wind was subject to further enhancement due to coronal hole influence with Solar wind speed reaching a maximum of close to 500 km/s, meanwhile recovering to around 430 km/s. After an initial sustained period of strongly negative Bz (-13nT) the magnetic field magnitude recovered to nominal values of around 5nT, with a variabale Bz component. A further recovery towards nominal Solar wind conditions is expected over the next days. Geomagnetic conditions have been active (both NOAA Kp and local K Dourbes 4) on June 3 afternoon associated to the sustained negative values of Bz, but remained quiet afterwards. Quiet to unsettled geomagnetic conditions are expected over the next days.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 027, sur la base de 22 stations.

Indices solaires pour 03 Jun 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	078
AK Chambon La Forêt	017
AK Wingst	011
Ap estimé	012
Nombre international de taches solaires estimé	026 - Basé sur 25 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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