Affichage des archives de jeudi, 3 juillet 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Jul 03 1242 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
03 Jul 2014	182	008
04 Jul 2014	190	005
05 Jul 2014	196	004

Bulletin

Only 4 C-class events were observed over the last 24 hours. The strongest reached a maximum of C2.6 at 03:59UT (3 July) and originated from a region just behind the Sun's east limb. It was associated to a fast, not Earth-directed CME (about 1400 km/s). Of the 9 visible sunspot groups, NOAA 2104 remains the largest and most complex region, still having a magnetic delta. However, it did not produce a C-class flare. NOAA 2100, 2106 and 2107 produced each a C1-flare. The long filaments resp. near NOAA 2106, about 20 degrees west of NOAA 2107, and in the southwest quadrant, are still present but -for the moment- stable. C-class flares are expected, with a chance on an isolated M-class flare. A solar wind structure arrived at ACE near 23:30UT. Wind speed jumped from about 320 to 350 km/s. Bz turned southward around 02:30UT and remained between -4 and -8 nT for nearly 9 hours before returning to positive values. The impact on the geomagnetic field was minimal, as only quiet geomagnetic conditions have been recorded so far (K < 4). A small equatorial coronal hole that passed the central meridian on 30 June may affect Earth on 4 July. Quiet geomagnetic conditions are expected, with locally a brief active episode possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 130, sur la base de 15 stations.

Indices solaires pour 02 Jul 2014

Nombre de Wolf, observé par Catania	231
Flux solaire à 10 cm	169
AK Chambon La Forêt	013
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	111 - Basé sur 25 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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