Affichage des archives de mardi, 13 décembre 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Dec 13 1234 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
13 Dec 2016	071	006
14 Dec 2016	070	008
15 Dec 2016	069	015

Bulletin

Solar activity continues to be low without C-class flares reported since December 10. The only active region presently observed on the visible side of the solar disc, NOAA 2617, has approached to the west solar limb. We expect solar activity to stay at the same low level, and although the isolated C-class flares are possible they are not very probable. Newly available observations confirm that the CME, first seen in the SOHO LASCO C2 field of view at 06:48 UT on December 11, was a back side event and will therefore not arrive at the Earth. No Earth directed CMEs were observed in the last 24 hours.

The solar wind speed remains to be about 530 km/s, and the interplanetary magnetic field magnitude is presently about 4 nT. The fast solar wind associated with the small equatorial coronal hole which reached the central meridian yesterday morning is expected to arrive at the Earth in the midday of December 15. It might be closely followed in arrival time by the fast flow from the small coronal hole (between S08 and S12) which reached the central meridian early this morning. The geomagnetic conditions are presently quiet and we expect them to stay so in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 014, sur la base de 08 stations.

Indices solaires pour 12 Dec 2016

Nombre de Wolf, observé par Catania	013
Flux solaire à 10 cm	071
AK Chambon La Forêt	008
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	013 - Basé sur 16 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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