Affichage des archives de mardi, 2 octobre 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Oct 02 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
02 Oct 2018	070	007
03 Oct 2018	069	010
04 Oct 2018	068	010

Bulletin

One active region visible on the solar disc, NOAA 2723 with beta magnetic field configuration. No C-class flares in past 24 h. Solar activity is expected to remain at low levels.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 480 km/s with interplanetary magnetic fields of 5 nT. Geomagnetic conditions reached active levels between 15:00 UT and 17:00 UT on October 1 at Dourbes (K=4), at planetary levels Kp reached 4 between 12:00 UT and 15:00 UT on October 1 and between 00:00 UT and 03:00 UT on October 2. This was due to solar wind of relatively high speed (reaching 530 km/s) with interplanetary magnetic fields up to 10 nT with oscillating periods including negative Bz. Quiet to unsettled conditions for the coming hours are foreseen. The fast solar wind associated with a small negative polarity equatorial coronal hole is expected to arrive on October 4 (or late on October 3), causing up to active geomagnetic conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 014, sur la base de 14 stations.

Indices solaires pour 01 Oct 2018

Nombre de Wolf, observé par Catania	017
Flux solaire à 10 cm	070
AK Chambon La Forêt	021
AK Wingst	012
Ap estimé	011
Nombre international de taches solaires estimé	017 - 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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