Affichage des archives de mardi, 6 août 2019

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2019 Aug 06 1231 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
06 Aug 2019	067	014
07 Aug 2019	067	016
08 Aug 2019	067	005

Bulletin

Solar activity was at very low levels. The small sunspot region which appeared yesterday (5 August) had decayed by midnight leaving the Sun spotless again. No earth-directed coronal mass ejections (CME) were observed. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

The earth environment remained under the influence of the high-speed stream (HSS) of the positive polarity coronal hole. Solar wind speed further increased and varied mostly between 690 and 760 km/s from 20UT till 06UT (ACE). By the end of the period, values had decreased somewhat to near 640 km/s. Bz oscillations became less pronounced, from initial values between -8 and +8 nT to between -4 and + 4 nT after 20UT. The interplanetary magnetic field (phi angle) was mostly directed away from the Sun.

Geomagnetic conditions ranged from quiet to minor storming. Quiet to active geomagnetic conditions are expected, with a small chance on an isolated minor storming period.

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

Indices solaires pour 05 Aug 2019

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	045
AK Wingst	035
Ap estimé	037
Nombre international de taches solaires estimé	013 - Basé sur 22 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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