Affichage des archives de lundi, 29 octobre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Oct 29 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
29 Oct 2018	068	003
30 Oct 2018	068	010
31 Oct 2018	068	006

Bulletin

Solar activity was at very low levels. The Sun was spotless. A narrow coronal mass ejection (CME) was observed in STEREO-A/COR2 coronagraphic imagery starting at 05UT on 29 October. Standing-by further imagery to determine its potential geo-effectiveness. A small negative polarity coronal hole (CH) has transited the Central Meridian, substantially decreasing in size over the last 24 hours. Both the CME and the change in CH size may be related to some mild magnetic reconnection in the southern hemisphere (central portion) late on 28 October.

Solar activity is expected to remain at very low levels.

Solar wind speed varied between 300 and 340 km/s (DSCOVR). Bz varied mostly between -2 and +4 nT. Around 08UT, the direction of the interplanetary magnetic field turned from mostly away to towards the Sun. Quiet geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected to continue until the arrival of the wind stream associated with the small equatorial CH on 30 or 31 October. This may result in unsettled geomagnetic conditions, with an isolated active episode possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 10 stations.

Indices solaires pour 28 Oct 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	003
AK Wingst	003
Ap estimé	002
Nombre international de taches solaires estimé	000 - 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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