Affichage des archives de dimanche, 24 janvier 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Jan 24 1230 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Active conditions expected (A>=20 or K=4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
24 Jan 2016	100	008
25 Jan 2016	104	006
26 Jan 2016	108	022

Bulletin

A single C-class flare was observed during the period. This long duration C1 flare was produced by NOAA 2488 and peaked at 04:55UT. The faculae field preceding old active region NOAA 2481 has started to round the southeast limb. This region was the source of some flaring activity and coronal mass ejections (CMEs) during its transit over the Sun's backside. The filament near NOAA 2487 has stretched to about 40 degrees in length and is transiting the central meridian. No earth-directed CMEs were observed.

There remains a good chance on a C-class flare.

Earth exited the high speed stream of the southern polar coronal hole (CH) late on 23 January. Solar wind speed declined from initial values between 550-600 km/s to values between 410-470 km/s by the end of the period. Bz varied between -5 nT and +5 nT, while the interplanetary magnetic field was mostly directed towards the Sun. Quiet to unsettled geomagnetic conditions were observed.

Mostly quiet to unsettled geomagnetic conditions are expected. Starting late on 25 or on 26 January, chances on an active episode may increase following the expected arrival of the high speed stream from the (positive) northern polar CH extension.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 044, sur la base de 07 stations.

Indices solaires pour 23 Jan 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	099
AK Chambon La Forêt	020
AK Wingst	011
Ap estimé	011
Nombre international de taches solaires estimé	057 - Basé sur 20 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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