Affichage des archives de jeudi, 24 juillet 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Jul 24 1228 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
24 Jul 2014	109	006
25 Jul 2014	115	007
26 Jul 2014	120	007

Bulletin

Solar activity has been mainly quiet with the background X-ray flux remaining between the B2 and B3 level. Catania sunspot group 22 (NOAA AR 2121) however did produce a C2.1 flare peaking at 1:51 UT. A chance for a further occasional C-flare from AR 2121 remains and also the probability for C-flares from Catania group 24 (NOAA AR 2123) has increased. With a reasonable full disc chance for C flares the all quiet alert status is therefore lifted, though at most an occasional low C level flare is likely. No significant Earth directed CME's were observed. A transequatorial coronal hole crossed the central meridian around UT midnight July 23 to 24. It is likely to influence the solar wind conditions near Earth starting late July 26, early July 27. Solar wind speed was first stable in the beginning of the reporting period around 320 km/s and later picked up to enhanced values of around 380 km/s presently. The total magnetic field also increased from being stable between 3-4nT just before the reporting period to fluctuating between 2nT and 7nT during the past 24 hours with Bz variable between +-5nT. Geomagnetic conditions were mostly quiet (NOAA Kp = 1-2 and local K Dourbes = 0-2) with a 6 hour period of unsettled conditions before UT midnight (both NOAA Kp and local K Dourbes = 3). Slightly enhanced solar wind conditions and quiet to unsettled geomagnetic conditions are expected to continue under the influence of a coronal hole stream.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 048, sur la base de 17 stations.

Indices solaires pour 23 Jul 2014

Nombre de Wolf, observé par Catania	079
Flux solaire à 10 cm	099
AK Chambon La Forêt	012
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	048 - Basé sur 27 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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