Affichage des archives de dimanche, 19 juillet 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Jul 19 1231 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
19 Jul 2020	068	005
20 Jul 2020	068	007
21 Jul 2020	069	005

Bulletin

Solar activity was at very low levels and is expected to remain so.

No earth-directed coronal mass ejections (CMEs) were observed in the available coronagraphic imagery. A negative polarity equatorial coronal hole began to traverse the central meridian on 19 July.

The greater than 10 MeV proton flux was at nominal levels and the greater than 2 MeV electron flux was at nominal to moderate levels during the last 24 hours and are expected to remain so for the next 24 hours.

The solar wind speed ranged between 320 km/s to 370 km/s (DSCOVR). The total magnetic field remained below 6 nT. Bz ranged between -6 and +2 nT. The direction of the interplanetary magnetic field (phi angle) was mostly directed away from the Sun (positive sector). For the next 24 hours the solar wind speed is expected to remain at nominal levels. An extension to the southern polar coronal hole and a small patchy positive polarity equatorial coronal hole, which began to transit the central meridian on Jul 16, may cause a slight enhancement to the solar wind conditions from 20 July.

Geomagnetic activity was mostly quiet (local K Dourbes and NOAA Kp recorded values between 0-3 and 0-1, respectively). Geomagnetic conditions are expected to be mostly quiet on 19 - 21 July, with possible unsettled conditions from late on 20 July.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 25 stations.

Indices solaires pour 18 Jul 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	068
AK Chambon La Forêt	008
AK Wingst	006
Ap estimé	004
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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