Affichage des archives de dimanche, 16 août 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Aug 16 1325 UTC

Prévisions SIDC

Éruptions solaires

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
16 Aug 2015	088	031
17 Aug 2015	086	010
18 Aug 2015	084	010

Bulletin

Solar activity was low with no C-class flares reported. We expect the low solar activity to persist in the coming hours with possible isolated C-class flare. No Earth directed CMEs were observed in the last 24 hours.

The solar wind speed is slowly increasing and it currently amounts to about 550 km/s. The interplanetary magnetic field magnitude is still slightly elevated and currently amounts to about 8 nT. Since arrival of the shock wave and the ICME yesterday morning, the Bz component of the interplanetary magnetic field had long intervals of negative values (down to -10 nT). The strongly negative values of Bz component of the interplanetary magnetic field and the fast solar wind induced geomagnetic storm conditions (NOAA reported Kp=6 and a number of Kp=5 intervals and local stations Dourbes and IZMIRAN reported up to K=5). Currently the Bz component is positive however if the Bz component of the interplanetary magnetic field turns negative we can expect active to unsettled conditions to persist in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 036, sur la base de 17 stations.

Indices solaires pour 15 Aug 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	089
AK Chambon La Forêt	055
AK Wingst	029
Ap estimé	034
Nombre international de taches solaires estimé	036 - Basé sur 22 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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