Affichage des archives de dimanche, 22 juillet 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Jul 22 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
22 Jul 2018	069	007
23 Jul 2018	069	007
24 Jul 2018	068	017

Bulletin

Solar activity remains to be low despite the appearance of the new active region NOAA AR 2716, which emerged during last 24 hours and is presently situated close to the center of the solar disc. We expect such a low flaring activity (without C-class flares), to persist 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 presently amounts about 500 km/s. The maximum solar wind speed (about 580 km/s), during last 24 hours was reached at about 16:00 UT on July 21. The interplanetary magnetic filed magnitude is presently about 4 nT. The fast solar wind, associated with extended equatorial coronal hole which reached central meridian in the early morning of July 21, is expected at the Earth in the mid of the day on July 24. The arrival of the fast flow might induce active geomagnetic conditions late on July 24. The geomagnetic conditions are presently quiet to unsettled 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 21 stations.

Indices solaires pour 21 Jul 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	016
AK Wingst	014
Ap estimé	015
Nombre international de taches solaires estimé	000 - Basé sur 17 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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