Affichage des archives de dimanche, 18 décembre 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Dec 18 1346 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 Dec 2016	072	018
19 Dec 2016	071	016
20 Dec 2016	070	006

Bulletin

Solar activity is extremely low, without C-class flares reported. The only sunspot group observed during last two day, on the visible side of the sun, NOAA AR 2618, is presently at the west solar limb. We expect solar activity to remain on the same low level. The partial halo CME first seen in the SOHO LASCO C2 field of view at 03:36 UT on December 17 was a back side event and will not arrive to the Earth. No Earth directed CMEs were observed in the last 24 hours.

The solar wind speed is presently about 440 km/s, and the interplanetary magnetic field is 4nT. Due to longer intervals of negative value of the Bz component of the interplanetary magnetic field (down to -8nT), active geomagnetic conditions were reported around midnight of December 17 and early morning today (local station at Dourbes reported K=4). The geomagnetic conditions are presently quiet to unsettled. We expect active conditions later today and tomorrow due to expected arrival of the fast solar wind associated with the low latitude extend of the northern polar coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 034, sur la base de 11 stations.

Indices solaires pour 17 Dec 2016

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	072
AK Chambon La Forêt	014
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	013 - Basé sur 11 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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