Affichage des archives de lundi, 20 juillet 2015

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2015 Jul 20 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
20 Jul 2015	100	011
21 Jul 2015	099	013
22 Jul 2015	098	011

Bulletin

The long-duration C2.1 flare related to the complex filament eruption in the southwest quadrant peaked on 19 July at 10:40UT and ended at 13:02UT. The bulk of the related coronal mass ejection (CME), first seen in LASCO/C2 imagery by CACTus on 09:48UT, is directed away from Earth. However, a glancing blow from this CME cannot be ruled out and may impact Earth on 22 or early 23 July. At most active geomagnetic conditions are expected. The two currently visible sunspot regions were quiet. No C-class flares or other earth-directed CMEs were observed.

Quiet flaring conditions are expected, with a small chance on a C-class flare.

Solar wind speed further declined from 300 km/s to 270 km/s around 03:00UT, then increased to its current values between 290-300 km/s. Bz was initially very low, but has been persistently negative from about 03:00UT till 11:00UT, with maximum values near -6 nT. Bz then quickly returned to very low values. The interplanetary magnetic field (IMF) was mostly directed away from the Sun. Quiet to unsettled geomagnetic conditions have been observed.

Mostly quiet to unsettled geomagnetic conditions are expected, but with a chance on an active geomagnetic episode in response to the anticipated arrival of the high speed stream of the positive transequatorial coronal hole.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 044, sur la base de 16 stations.

Indices solaires pour 19 Jul 2015

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	099
AK Chambon La Forêt	005
AK Wingst	002
Ap estimé	002
Nombre international de taches solaires estimé	047 - Basé sur 26 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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