Affichage des archives de mardi, 19 janvier 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Jan 19 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
19 Jan 2016	100	012
20 Jan 2016	099	006
21 Jan 2016	098	014

Bulletin

Solar flaring activity remained below C-class level. The currently visible sunspot groups are small and inactive. No earth-directed coronal mass ejections (CME) were observed.

Mostly quiet flaring conditions are expected, with only a small chance on an isolated C-class flare. A shock was observed in the solar wind speed on 18 January at 20:55UT with an abrupt increase from just below 300 km/s to 370 km/s, likely marking the arrival at Earth of the faint 14/15 January CME. Since then, solar wind speed has been mostly varying between 350 and 400 km/s. Bz oscillated between -11 and +13 nT as observed by ACE. Some more pronounced negative episodes, with values up to -10 nT, were recorded during the 21-03UT and 06-07UT intervals and again around 09:00UT. Active geomagnetic conditions were recorded during the 00-03UT interval, the remainder of the period was quiet to unsettled. A southern polar coronal hole (CH) extension at -25 to -30 degrees latitude is transiting the Central Meridian (CM).

Quiet to unsettled geomagnetic conditions are expected, with an active episode possible from the waning effects of the passing CME on 19 January and from the CH high speed stream on 20-21 January.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 067, sur la base de 14 stations.

Indices solaires pour 18 Jan 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	100
AK Chambon La Forêt	///
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	048 - Basé sur 21 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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