Affichage des archives de mercredi, 25 octobre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Oct 25 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
25 Oct 2017	079	041
26 Oct 2017	079	040
27 Oct 2017	079	021

Bulletin

Quiet solar conditions were reported with the X-ray flux touching only marginally into the B level. Both active regions on disk are relatively simple (Mag.Type: Alpha) and quiet. The X-ray flux is expected to remain below C level. Proton flux levels were at background values and are expected to remain so. No Earth directed CME's were recorded in coronagraph data.

Solar wind speed increased further as expected under the influence of the coronal hole high speed stream. Speeds increased to values between 600-650kms after 20UT and remained at those values since. Total magnetic field was mostly in the 7-11nT range but presently steady at around 5.5 nT. Bz was variable but saw some periods of negative values down to -9nT. The phi angle was predominantly in the positive sector. Total magnetic field is expected to remain around nominal values while solar wind speed is expected to remain elevated over the next 24-48 hours. Geomagnetic conditions reached some periods of minor geomagnetic storming (Both NOAA Kp and local K Dourbes 5 for the 15-18UT period, while only NOAA Kp reaching 5 in the 6-9UT period). As solar wind speed remains elevated further minor geomagnetic storming episodes should be anticipated.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 023, sur la base de 16 stations.

Indices solaires pour 24 Oct 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	078
AK Chambon La Forêt	044
AK Wingst	028
Ap estimé	026
Nombre international de taches solaires estimé	024 - Basé sur 15 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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