Affichage des archives de samedi, 21 juillet 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Jul 21 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
21 Jul 2018	070	008
22 Jul 2018	070	005
23 Jul 2018	069	006

Bulletin

Solar activity is extremely low without any flaring activity reported during last 24 hours. We do not expect any change of the activity in the coming hours. Coronagraph images do not show signatures of the Earth directed CMEs, and the solar protons are at the background level.

Solar wind speed has increased and it presently amounts about 510 km/s. The maximum solar wind speed (about 550 km/s), during last 24 hours was reached at about 11:20 UT today. The interplanetary magnetic filed magnitude is presently about 8 nT. The patchy but rather extended equatorial coronal hole (possibly even connected with the southern polar coronal hole), has reached central meridian early this morning. The associated fast solar wind is expected at the Earth in the mid of the day on July 24. The geomagnetic conditions are presently unsettled to quiet and we expect such a geomagnetic conditions to persist in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 12 stations.

Indices solaires pour 20 Jul 2018

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	071
AK Chambon La Forêt	015
AK Wingst	009
Ap estimé	009
Nombre international de taches solaires estimé	000 - Basé sur 30 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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