Affichage des archives de jeudi, 13 juillet 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jul 13 1230 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
13 Jul 2017	089	003
14 Jul 2017	088	013
15 Jul 2017	087	008

Bulletin

Solar activity was at very low levels, no flares, no Coronal Mass Ejections (CMEs) were observed during the past 24 hours. NOAA 2665 decayed further and was quiet. New NOAA AR 2666 was numbered today but remained inactive. Solar protons have remained at background levels over the past 24 hours. One negative polarity southern coronal hole (small in size) will move into the geoeffective position from tomorrow (14-July-2017). Flaring activity is expected to be on B-level, C flares are also not excluded. Solar wind speed gradually declined from 515 km/s till 395 km/s. Bz was relatively stable between -3 and +3 nT. The interplanetary magnetic field was below 4 nT. The geomagnetic field was at quiet levels (planetary index KP NOAA from 0 to 1; local index K Dourbes from 1 to 3). Geomagnetic conditions are expected to remain quiet at least till midnight today (13-July-2017). From tomorrow active geomagnetic conditions are possible due to the mentioned above negative coronal hole possible geoeffectivness.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 062, sur la base de 24 stations.

Indices solaires pour 12 Jul 2017

Nombre de Wolf, observé par Catania	072
Flux solaire à 10 cm	090
AK Chambon La Forêt	007
AK Wingst	004
Ap estimé	003
Nombre international de taches solaires estimé	063 - Basé sur 31 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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