Affichage des archives de lundi, 6 mai 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 May 06 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
06 May 2019	075	006
07 May 2019	075	015
08 May 2019	075	016

Bulletin

Solar activity was dominated by NOAA region 2740 which produced several C flares including an impulsive C9.9 flare peaking at 5:10UT. Continued flux emergence is observed in the region with mixed polarity fields making continued C flaring likely.

The C9.9 flare was associated with radio bursts and an EUV dimming signs of a CME initiation. Incomplete coronagraph data from both STEREO-A COR2 as well as SoHO LASCO C2 and C3 seem to indicate that the CME was not particularly wide and hence it is currently assumed that it is not Earth directed. This remains to be confirmed though by more complete coronagraph imagery.

Solar proton flux levels were at background values and are expected to remain so.

Solar wind speed decreased to under 400 km/s and total magnetic field remained at nominal values under 5 nT, with a variable Bz component. The phi angle was in the negative sector. Solar wind conditions are first expected to remain nominal with later towards May 8 the possible influence of an equatorial coronal hole setting in.

Geomagnetic conditions were quiet (both local K Dourbes and NOAA Kp 0-2). Geomagnetic conditions are expected to remain quiet, later increasing to unsettled conditions with a slight chance for an isolated active period due to high speed stream effect.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 014, sur la base de 19 stations.

Indices solaires pour 05 May 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	074
AK Chambon La Forêt	008
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	013 - Basé sur 22 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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