Affichage des archives de jeudi, 18 juillet 2013

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2013 Jul 18 1257 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
18 Jul 2013	112	015
19 Jul 2013	112	044
20 Jul 2013	113	010

Bulletin

Solar activity is low. The last C-class flare reported was C1.6 flare, peaking at 09:16 UT on July 17. The Catania sunspot group 30 (NOAA AR 1791) and NOAA AR 1793 still have beta-gamma configuration of the photospheric magnetic field, and therefore, also the potential to produce C-class and possibly M-class flares. The newly arrived data showed that the CME from July 16 will probably not arrive at the Earth since the bulk of the CME mass was directed north-west of the Sun-Earth line. The interplanetary magnetic field magnitude is about 5 nT. The solar wind speed is increasing, and it is currently about 450 km/s. The observed increase of the solar wind speed is probably due to the arrival of the fast flow associated with the low-latitude coronal hole in the northern hemisphere which reached the central meridian on July 16. We expect minor storm conditions with possibly isolated intervals of major storm conditions in the following 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 068, sur la base de 18 stations.

Indices solaires pour 17 Jul 2013

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	111
AK Chambon La Forêt	009
AK Wingst	004
Ap estimé	004
Nombre international de taches solaires estimé	054 - Basé sur 21 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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