Affichage des archives de jeudi, 18 juillet 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Jul 18 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
18 Jul 2019	068	005
19 Jul 2019	068	005
20 Jul 2019	067	005

Bulletin

Solar activity was at very low levels. The Sun remains spotless and no flares have been observed. No Earth directed coronal mass ejections (CME) were observed over the last 24 hours in the available coronagraph imagery. The greater than 10 MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain at very low levels.

The solar wind speed gradually decreased over the period from 460 to around 360 km/s (ACE). The Bz varied between -3 and +2 nT. During the first half of the period the interplanetary magnetic field was predominantly directed away from the Sun (positive sector) but switched to be mostly in the negative sector from 00:00 UT July 18 . Quiet to unsettled geomagnetic conditions were observed, with the Kp index (NOAA) ranging between 0-2 and the local K index (Dourbes) ranging between 0-3 over the past 24 hours.

Quiet geomagnetic conditions are expected with possible isolated unsettled intervals.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 21 stations.

Indices solaires pour 17 Jul 2019

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	068
AK Chambon La Forêt	009
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	000 - Basé sur 26 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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