Affichage des archives de mercredi, 18 mai 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 May 18 1230 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
18 May 2016	104	013
19 May 2016	106	016
20 May 2016	105	014

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a B4.1 class flare, produced by Active Region (AR) 2544 (Macintosh class:Cao; Mag. type:Beta-gamma). All other ARs have been quiet. AR 2544 has exhibited significant flux emergence and cancellation in HMI observations, which may lead to further flares. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a medium probability of C-class flares and a low probability of M-class flares. The solar wind speed has remained around 550 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 6 nT. The Bz component fluctuated between -6 and +6 nT. Geomagnetic conditions ranged between Kp index 2-3 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. A large Northern positive polar coronal hole is currently positioned in the central longitudes of the Sun and will rotate into the Western hemisphere in the coming days, the resulting Co-rotating Interaction Region (CIR) and high-speed stream (HSS) may enhance geo- activity. The CME produced at 15:24 UT on 15-May-2016 has shown no influence on the Earth yet, but may in coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 030, sur la base de 18 stations.

Indices solaires pour 17 May 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	103
AK Chambon La Forêt	025
AK Wingst	016
Ap estimé	017
Nombre international de taches solaires estimé	037 - Basé sur 26 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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