Affichage des archives de samedi, 9 novembre 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Nov 09 1411 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Warning condition (activity levels expected to increase, but no numeric forecast given)

	Flux de 10 cm	Ap
09 Nov 2013	144	022
10 Nov 2013	144	005
11 Nov 2013	146	004

Bulletin

Only three weak C-class flares were reported since the previous bulletin. However, Catania sunspot group 35 (NOAA AR 1890) keeps the beta-gamma-delta configuration of its photospheric magnetic field. We therefore expect the flaring activity to continue on the M-level, with an X-class flare being possible but unlikely. Due to the position of the Catania sunspot group 35 (NOAA AR 1890) right to the west of the solar central meridian, a warning condition for a proton event is maintained. Currently the proton flux at energies above 10 MeV is slowly growing, but this growth is most probably due to earlier eastern hemisphere events and is not expected to lead to a proton event. Since late November 8, the Earth is inside a region of elevated interplanetary magnetic field (IMF) magnitude (up to 17 nT), probably representing an ICME. The corresponding solar CME is not clear at the moment. The solar wind speed remained low (around 400-450 km/s), so only active (K = 4, Dourbes, IZMIRAN, NOAA) to minor storm (K = 5, IZMIRAN) geomagnetic conditions were reported. Currently the solar wind speed reaches 530 km/s, and the IMF magnitude is still increased (around 10 nT), so active geomagnetic conditions are still possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 077, sur la base de 15 stations.

Indices solaires pour 08 Nov 2013

Nombre de Wolf, observé par Catania	172
Flux solaire à 10 cm	146
AK Chambon La Forêt	015
AK Wingst	005
Ap estimé	005
Nombre international de taches solaires estimé	100 - 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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