Affichage des archives de jeudi, 23 février 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Feb 23 1230 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

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

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
23 Feb 2017	084	020
24 Feb 2017	084	026
25 Feb 2017	084	008

Bulletin

Catania group 96 (NOAA region 2638) produced the first C flare since the past month, a C4.1 flare peaking at 13:27UT. The amount of mixed polarity field in the middle portion and surroundings of the leading spot has meanwhile diminished. There remains a chance for C flaring from this region. No Earth directed CMEs have been observed in coronagraph data. Proton fluxes are at background levels and expected to remain so.

Since 4:00UT solar wind speed has shown the expected increase under the equatorial coronal hole influence, from around 400 km/s to 450-500 km/s. Total magnetic field increased over the whole period to around 10 nT with Bz variable and not below -5nT. Solar wind conditions are expected to become further enhanced and remain so over the next 48 hours. Geomagnetic conditions were quiet to unsettled (local K Dourbes 1-3, NOAA Kp 1-2). Active periods must be anticipated under the enhanced solar wind conditions with also minor geomagnetic storm periods possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 024, sur la base de 09 stations.

Indices solaires pour 22 Feb 2017

Nombre de Wolf, observé par Catania	028
Flux solaire à 10 cm	083
AK Chambon La Forêt	012
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	026 - Basé sur 16 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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