Affichage des archives de vendredi, 16 mai 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 May 16 1310 UTC

Prévisions SIDC

Éruptions solaires

Eruptive (C-class flares expected, probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

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

	Flux de 10 cm	Ap
16 May 2014	152	007
17 May 2014	148	008
18 May 2014	146	008

Bulletin

The solar activity is very low. The strongest flare observed in last 24 hours was a C5.7 flare peaking at 07:04 UT this morning. The flare originated from the Catania sunspot group 43 (NOAA AR 2056) which still has beta-gamma configuration of its photospheric magnetic field. Currently available data show no clear signatures of CME possibly associated with this flare. The partial halo CME, first seen in the SOHO LASCO C2 field of view at 20:48 UT on May 15, had angular width of about 180 degrees and projected plane of the sky speed of about 600 km/s. The radio signature of the shock wave, i.e., type II radio burst was observed, associated with this CME. The radio bursts drift rate gives indication of the shock wave speed of about 900 km/s. From the currently available data it seems that the source region of this CME was just behind the east solar limb and the CME will therefore not arrive at the Earth. The Catania sunspot groups 43 and 47 (NOAA ARs 2056 and 2060, respectively) still have beta-gamma configuration of the photospheric magnetic field and they are situated in the western solar hemisphere. Therefore, we keep the warning conditions for a proton event. Earth is currently inside of a slow solar wind with a speed of about 350 km/s. The interplanetary magnetic field magnitude is at the moment 6 nT. The geomagnetic conditions are quiet and expected to remain so in the following hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 094, sur la base de 18 stations.

Indices solaires pour 15 May 2014

Nombre de Wolf, observé par Catania	167
Flux solaire à 10 cm	152
AK Chambon La Forêt	008
AK Wingst	///
Ap estimé	006
Nombre international de taches solaires estimé	107 - 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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