Affichage des archives de vendredi, 22 juillet 2016

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2016 Jul 22 1230 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
22 Jul 2016	098	013
23 Jul 2016	098	021
24 Jul 2016	095	006

Bulletin

NOAA 2567 produced all 7 C-class flares observed during the period, the strongest being a C9.1 peaking at 12:55UT. NOAA 2567 has decreased somewhat in sunspot area and magnetic complexity. NOAA 2565 was quiet. No earth-directed coronal mass ejections (CMEs) were observed. A substantial CME first seen by LASCO/C2 at 02:48UT was related to a backside event.

C-class flaring is expected, with a chance on an M-class flare.

Solar wind speed decreased from 430 to 380 km/s. Bz gradually turned negative, from an initial +8 nT to -5 nT at the end of the reporting period. The interplanetary magnetic field was directed towards the Sun (negative). A positive coronal hole (CH; latitude +20 degrees) will start its central meridian transit later today. Quiet to unsettled geomagnetic conditions were observed.

Mostly quiet to unsettled geomagnetic conditions are expected. Active episodes are possible in response to the high speed stream of the negative northern coronal hole, and from a possible glancing blow of the 21 July CME later today or on 23 July. A minor storming episode is not excluded.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 043, sur la base de 25 stations.

Indices solaires pour 21 Jul 2016

Nombre de Wolf, observé par Catania	071
Flux solaire à 10 cm	100
AK Chambon La Forêt	011
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	055 - Basé sur 29 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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