Affichage des archives de jeudi, 23 août 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Aug 23 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
23 Aug 2018	067	014
24 Aug 2018	067	038
25 Aug 2018	067	034

Bulletin

X ray flux remained below B level throughout the period and this expected to remain so as the visible side of the Sun turned spotless

West of the decayed NOAA AR 2719 an eruption occurred around noon August 22 as evidenced from EUV images with e.g. a dimming in SDO/AIA 193 at 12:30 UT. Currently available SoHO/LASCO C2 images do not show any obvious signs of a possibly associated Earth bound CME.

Proton flux levels are at background values and are expected to remain so.

Solar wind declined further with speed dropping to around 400 km/s and a nominal magnetic field of 2-5nT. The phi angle which was stable in the negative sector before the period but shifted suddenly into the positive sector at the start of the period. Solar wind conditions are expected to become enhanced from between noon August 24 and noon August 25 with the possible arrival of the August 20 CME. Effects in terms of solar wind speed should be small but the magnetic field may see significant effects of the slow passing cloud.

Geomagnetic conditions were quiet to unsettled (K Dourbes 1-3 and NOAA Kp 0-2) and are expected to remain so for at least the remainder of the day. Should the August 20 CME carry significant Southward magnetic field, minor geomagnetic storms are possible from noon August 24 onwards.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 016, sur la base de 22 stations.

Indices solaires pour 22 Aug 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	067
AK Chambon La Forêt	013
AK Wingst	007
Ap estimé	007
Nombre international de taches solaires estimé	000 - Basé sur 24 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

<< Aller à l'aperçu quotidien