Affichage des archives de jeudi, 25 juillet 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Jul 25 1302 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
25 Jul 2013	110	011
26 Jul 2013	112	015
27 Jul 2013	115	003

Bulletin

During the last 24 hours, Catania sunspot group 35 (NOAA AR 1800) produced three weak C-class flares, the strongest one being the C1.8 flare peaking at 21:43 UT yesterday. We expect more C-class flares in this group, but the probability for flaring at the M-level is low. A filament eruption at the solar central meridian (between Catania sunspot groups 35 and 44) starting around 02:00 UT today was accompanied by coronal dimmings and a post- eruption arcade, as shown by the SDO/AIA data. However, no corresponding CME was detected by SOHO/LASCO or STEREO/COR. The Earth is currently inside a slow (around 320 km/s) solar wind flow with average (around 5 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions until the arrival of the interaction region between the slow and fast solar wind flows later today (followed by the fast flow from the equatorial coronal hole), which may result in active geomagnetic conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 058, sur la base de 18 stations.

Indices solaires pour 24 Jul 2013

Nombre de Wolf, observé par Catania	090
Flux solaire à 10 cm	108
AK Chambon La Forêt	007
AK Wingst	006
Ap estimé	005
Nombre international de taches solaires estimé	047 - 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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