Affichage des archives de mercredi, 5 septembre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Sep 05 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
05 Sep 2018	067	013
06 Sep 2018	068	015
07 Sep 2018	068	015

Bulletin

Solar activity was at very low levels. No earth-directed coronal mass ejections (CMEs) were observed in the available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. A small negative polarity coronal hole has transited the Central Meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed continued its gradual increase from an initial 400 km/s to values around 500 km/s by the end of the period (DSCOVR). Bz varied mostly between -6 and +5 nT, with a negative stretch from 21UT till 01UT. The direction of the interplanetary magnetic field was mostly in a positive sector (away from the Sun) until about 09UT, after which it was directed more towards the Sun.

Quiet to unsettled geomagnetic conditions were observed, with Kp recording an isolated active episode during the 00-03UT interval. Quiet to unsettled geomagnetic conditions are expected. Chances on active episodes are likely to increase on 6 and 7 September in response to the expected arrival of the co-rotating interaction region (CIR) and wind stream from the negative polarity CH. A minor storming episode is not excluded.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 21 stations.

Indices solaires pour 04 Sep 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	068
AK Chambon La Forêt	020
AK Wingst	013
Ap estimé	012
Nombre international de taches solaires estimé	000 - Basé sur 28 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