Affichage des archives de mardi, 31 juillet 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Jul 31 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
31 Jul 2018	068	005
01 Aug 2018	068	008
02 Aug 2018	068	006

Bulletin

Solar activity was at very low levels. A small filament located at N15E20 slowly erupted on 31 July between 04 and 07UT. No x-ray flaring or obvious coronal dimming was associated with the event. No coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Solar wind speed varied between 300 and 340 km/s (DSCOVR). Bz was mostly negative during the first half of the period, and positive during the second half, varying between -6 and +5 nT. The interplanetary magnetic field turned to a predominately away direction (positive sector) around 01UT. Mostly quiet geomagnetic conditions were observed, with some unsettled intervals recorded by Dourbes.

Mostly quiet to unsettled geomagnetic conditions are expected.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 20 stations.

Indices solaires pour 30 Jul 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	///
AK Wingst	007
Ap estimé	005
Nombre international de taches solaires estimé	000 - Basé sur 37 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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