Affichage des archives de jeudi, 23 juillet 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Jul 23 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
23 Jul 2020	070	011
24 Jul 2020	071	010
25 Jul 2020	071	011

Bulletin

Solar flaring activity was at very low levels. No significant flares have been recorded. AR12767 (Hsx/alpha, S22E58) is crossing the solar disk. Solar activity is expected to remain at low levels.

No Earth directed Coronal Mass Ejections (CMEs) were observed in the available coronagraphic imagery.

The greater than 10 MeV proton flux was at background levels the past 24 hours. It is expected to remain so in the next 24 hours. The greater than 2 MeV electron flux was at background to moderate levels over the past 24 hours and is expected to remain so for the next 24 hours. The solar wind speed near Earth varied between 280 and 320km/s (DSCOVR). The polarity of the Interplanetary Magnetic Field (IMF) was predominantly oriented away the Sun (phi angle in the positive sector) with a variation to the negative sector on July 23rd 4-11UT. Bz fluctuated between -4 and +3 nT. The magnitude of the magnetic field varied between 2 and 6 nT. A southern negative Coronal Hole (CH) is crossing central meridian. For the next 24 hours the solar wind speed is expected to gradually enhance, as a possible response to the high speed stream from the CH that crossed central meridian on July 19th.

The geomagnetic conditions were quiet to unsettled. The values registered for the past 24 hours were 1-3 for K Dourbes and NOAA Kp=1. Quiet to unsettled, with a chance of an isolated active period (K Dourbes = 4), geomagnetic conditions are expected for the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 010, sur la base de 25 stations.

Indices solaires pour 22 Jul 2020

Nombre de Wolf, observé par Catania	011
Flux solaire à 10 cm	070
AK Chambon La Forêt	006
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	010 - Basé sur 36 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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