Affichage des archives de lundi, 2 octobre 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Oct 02 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
02 Oct 2017	085	007
03 Oct 2017	084	007
04 Oct 2017	083	005

Bulletin

Solar activity was at very low levels. The 3 visible sunspot groups were quiet. The greater than 10 MeV proton flux was at nominal levels. Quiet flaring conditions are expected, with a small chance on a C-class flare.

Some coronal dimming was observed at S10W50 on 01 October between 14 and 17UT, followed by post-eruption coronal loops over and to the northwest of NOAA 2682. The x-ray flux seems to have been mildly enhanced in response to this eruptive event. Some coronal mass ejections (CMEs) were observed by SOHO/LASCO starting late on 01 October, but they were relatively slow (CACTus) and directed to the west (no obvious earth-directed component).

Solar wind speed varied between 430 and 500 km/s (DSCOVR), ending the period near 440 km/s. Bz varied between -5 and +2 nT (DSCOVR). The interplanetary magnetic field was mostly directed away from the Sun. A small negative equatorial coronal hole (CH) started transiting the central meridian on 01 October.

The geomagnetic field was at quiet to unsettled levels, with Kp featuring a single active episode during the 03-06UT interval. Quiet to unsettled geomagnetic conditions are expected, with an active episode still possible. The arrival of the particle stream associated with the aforementioned CH is expected for 04 or 05 October, with increasing chances on active geomagnetic conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 034, sur la base de 21 stations.

Indices solaires pour 01 Oct 2017

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	086
AK Chambon La Forêt	021
AK Wingst	016
Ap estimé	015
Nombre international de taches solaires estimé	037 - Basé sur 12 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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