Affichage des archives de mercredi, 22 janvier 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Jan 22 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
22 Jan 2020	071	005
23 Jan 2020	071	004
24 Jan 2020	072	004

Bulletin

Solar activity was at very low levels. No significant flares have been recorded. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10 MeV proton flux was at nominal values. Solar activity is expected to remain at very low levels.

The increase in the total magnetic field observed from 9 UT Jan 21, as reported in the previous bulletin, continued to develop into an extended feature with a maximum of near 10 nT recorded. The solar wind speed gradually increased from 300 to 400 km/s (ACE). This may signify the arrival of the solar wind associated with the weak negative coronal hole, which passed the central meridian on Jan 16. For the majority of the period the magnetic field oscillated around 7 nT, while Bz varied between -9 and +7 nT. The interplanetary magnetic field (phi angle) was predominantly directed towards the Sun (negative sector).

Geomagnetic activity was quiet to unsettled, with the Kp index (NOAA) and the local k index (Dourbes) recording values of between 1 and 3. Mostly quiet conditions are expected on Jan 22-24, with possible continued unsettled periods on Jan 22 in response to any extended periods of strong negative Bz.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 12 stations.

Indices solaires pour 21 Jan 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	071
AK Chambon La Forêt	014
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	000 - Basé sur 24 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

<< Aller à l'aperçu quotidien