Affichage des archives de mardi, 19 août 2014

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2014 Aug 19 1234 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
19 Aug 2014	116	015
20 Aug 2014	121	012
21 Aug 2014	125	007

Bulletin

Solar activity has been low with just two C flares at the start of the reporting period. The largest one was a C1.8 originating from NOAA AR 2147, peaking at 13:55 UT. The other one a C1.2 flare from NOAA AR 2139 peaking at 16:56 UT. No earth directed CME's have been recorded. Solar activity is expected to remain at similar low levels over the next days. Solar wind conditions were steady and nominal until the arrival of a moderate shock this morning around 6:00 UT. Solar wind speed has increased since then from 290 km/s before the shock to around 380 km/s at present with a peak above 430 km/s in between. Total magnetic field increased from around to 7 nT to around 12nT presently with peaks above 13 nT. Bz was variable, mostly positive but with negative values peaking around -11nT. Temperature and density have also increased. The conditions are likely due to an earlier then expected arrival of the August 15 CME. Geomagnetic conditions remained quiet to unsettled so far (NOAA Kp mostly 1 but reaching K=3 just recently and local K Dourbes at most 2). Under the continued influence of the CME arrival, elevated solar wind conditions and periods of active geomagnetic conditions should be anticipated during the following day, with minor geomagnetic storm conditions possible. These will settle afterwards to unsettled and quiet to unsettled conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 067, sur la base de 14 stations.

Indices solaires pour 18 Aug 2014

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	111
AK Chambon La Forêt	009
AK Wingst	006
Ap estimé	004
Nombre international de taches solaires estimé	077 - 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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