Affichage des archives de vendredi, 20 décembre 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Dec 20 1225 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
20 Dec 2013	155	008
21 Dec 2013	155	007
22 Dec 2013	160	007

Bulletin

Six C-flares and two M-flares were observed during the past 24 hours. The strongest flare was a M3.5 event taking place at the east limb, from a region that currently is rotating to the front side of the solar disk. There were no Earth-directed CME observed. The probability for C-flares remains high, around 80%, from NOAA ARs 1917, 1920, 1928, 1930 and a new region at about 40 degrees west of the central meridian. There is a substantial chance (around 60%) for more M-flares, especially from the unnumbered region currently at the east limb. An X-flare is possible but unlikely. The proton flux for >10MeV protons, measured by GOES, currently remains well below threshold levels. We are currently in a slow solar wind stream with a solar wind speed of 350 km/s and a magnitude of the interplanetary magnetic field of 5 nT (observed by ACE). Current geomagnetic conditions are quiet to unsettled (Kp<4) and are expected to remain so during the next 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 097, sur la base de 15 stations.

Indices solaires pour 19 Dec 2013

Nombre de Wolf, observé par Catania	154
Flux solaire à 10 cm	153
AK Chambon La Forêt	013
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	096 - Basé sur 15 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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