Affichage des archives de mardi, 18 août 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Aug 18 1237 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 Aug 2020	071	003
19 Aug 2020	071	008
20 Aug 2020	071	014

Bulletin

The solar activity was low over the past 24 hours. The N0AA-AR 2771 is still on the disk. The X-ray flux was at A-class level and the solar activity is expected to remain low.

The Coronal Mass Ejection (CME) that took place on Aug 16th 18:00UT has a small chance of a glancing blow from late Aug 19th.

The greater than 10 MeV proton flux was at background levels over the past 24 hours. It is expected to stay at background levels for the next 24 hours. The greater than 2 MeV electron flux fluctuated between nominal and moderate levels over the past 24 hours. It is expected to remain nominal to moderate levels over the next 24 hours.

The solar wind speed near Earth varied between 280 and 340km/s (DSCOVR). The polarity of the Interplanetary Magnetic Field (IMF) was predominantly oriented away the Sun (phi angle in the positive sector). Bz fluctuated between -6 and +5 nT. The magnitude of the magnetic field varied between 1 and 7 nT. A negative coronal hole crossed the central meridian on August 17th. An enhancement could be expected on Aug 20th, possibly combined with any effects from the CME. For the first part of the next 24 hours, the solar wind speed is expected to remain low, while by the end of Aug 19th to be enhanced as a response to the influence of the CME.

The geomagnetic conditions were quiet. The values registered for the past 24 hours were 0-2 for K Dourbes and NOAA Kp. Quiet geomagnetic conditions are expected for the next 24 hours. The solar wind speed near Earth varied between 280 and 340km/s (DSCOVR). The polarity of the Interplanetary Magnetic Field (IMF) was predominantly oriented away the Sun (phi angle in the positive sector). Bz fluctuated between -6 and +5 nT. The magnitude of the magnetic field varied between 1 and 7 nT. A negative Coronal hole crossed the central meridian on August 17th. An enhancement could be expected on Aug 20th, possibly combined with any effects from the CME. For the next 24 hours the solar wind speed is expected to remain low for the beginnig of that time period, while by the end of Aug 19th to be enhanced as a response to the influence of the CME.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 012, sur la base de 21 stations.

Indices solaires pour 17 Aug 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	008
AK Wingst	004
Ap estimé	003
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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