Affichage des archives de samedi, 27 février 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Feb 27 1230 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
27 Feb 2016	090	006
28 Feb 2016	090	007
29 Feb 2016	090	007

Bulletin

Solar activity was low. The strongest event was a C3.3 flare from Catania group 27 (NOAA 2506) peaking at 5:55UT. Catania group showed flux emergence and growth of its trailing spot. Other regions were stable or in decay. Flaring is expected to be below C level although another isolated C flare from Catania group 27 remains possible. An equatorial coronal hole connected to the northern polar coronal hole has past the central meridian around midnight and may be influencing the solar wind at Earth location around March 1. SDO/AIA 193 shows a mass ejection originating from near S15E75 around 4:00UT. A clear off-limb dimming is visible. Awaiting confirmation from coronagraph data the event is preliminarily assessed to have limited angular extent and will hence most probably not be geoeffective. Coronagraph data are required to confirm this. Solar wind slightly decayed from around 430 km/s to around 390 km/s while total magnetic field was in the 4-7.5 nT range. Bz was variable though not below -4nT and mostly positive. The magnetic field phi angle remained in the positive sector. Solar wind conditions are expected to remain in this slightly enhanced state. Geomagnetic conditions were quiet (NOAA Kp 0-2) and are expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 028, sur la base de 16 stations.

Indices solaires pour 26 Feb 2016

Nombre de Wolf, observé par Catania	068
Flux solaire à 10 cm	089
AK Chambon La Forêt	007
AK Wingst	010
Ap estimé	008
Nombre international de taches solaires estimé	049 - Basé sur 18 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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