Affichage des archives de vendredi, 2 juin 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Jun 02 1230 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
02 Jun 2017	076	007
03 Jun 2017	077	017
04 Jun 2017	078	007

Bulletin

The only spotted region on disk, Catania group 29 (NOAA region 2661) continued to produce several C flares. The strongest was a C3.0 flare peaking at 22:59UT. The region appears relatively complex with mixed polarities in the middle and trailing sections. Further flaring at C level should be anticipated with also a slight probability for an M flare. Several East bound CMEs are visible in SoHO/LASCO C2 coronagraph images related to the activity from region 2661. They are all rather restricted in angular extent and will not influence Earth environment. Proton flux levels are at background values and are expected to remain so. Solar wind saw an increase of solar wind speed together with temperature which is possibly associated with the small equatorial coronal hole crossing the central meridian late May 29. Solar wind speed and temperature started an increase right at the start of the period when also the total magnetic field jumped to peaks of over 9nT. Solar wind speed reached a maximum of close to 450 km/s around 20:30UT when the magnetic field dropped to nominal values of under 5nT. The magnetic field Bz component showed some peaks down to -6.5nT, but did not remain negative for a prolonged time. Solar wind conditions have meanwhile recovered to nominal and are expected to remain so. Geomagnetic conditions have been at active levels locally (local K Dourbes reaching 4 in the afternoon of June 1) due to the slightly enhanced solar wind conditions, but were otherwise quiet to unsettled (NOAA Kp 1-3). Quiet to unsettled geomagnetic conditions are expected over the next 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 025, sur la base de 21 stations.

Indices solaires pour 01 Jun 2017

Nombre de Wolf, observé par Catania	015
Flux solaire à 10 cm	076
AK Chambon La Forêt	014
AK Wingst	010
Ap estimé	008
Nombre international de taches solaires estimé	015 - Basé sur 36 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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