Affichage des archives de mardi, 26 juin 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Jun 26 1244 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
26 Jun 2018	073	025
27 Jun 2018	072	020
28 Jun 2018	071	010

Bulletin

Solar activity is low and there were no B-class or stronger flares reported during last 24 hours. Since there is presently only one active region observed on the visible side of the solar disc, Catania sunspot group 88 (NOAA AR 2715), we expect low flaring activity to persist in the coming hours. Coronagraph images do not show signatures of the Earth directed CMEs, and the solar protons remained at the background level. As expected, the solar wind speed increased this morning and it presently amounts about 560 km/s. The interplanetary magnetic field showed smooth increase, observed starting from midday of June 25, which was followed by strong variation of its Bz component. All this, together with the observed sector change, indicates arrival of the fast solar wind associated with the recurrent coronal hole (the low latitude extent of the southern polar coronal hole which is reaching even up to the solar equator). Due to the longer interval of negative value of the Bz component, both local station at Dourbes and also NOAA reported disturbed geomagnetic conditions (K=5 and Kp=5, respectively). The geomagnetic conditions are presently unsettled to active and we expect such geomagnetic conditions to persist in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 015, sur la base de 25 stations.

Indices solaires pour 25 Jun 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	073
AK Chambon La Forêt	028
AK Wingst	///
Ap estimé	013
Nombre international de taches solaires estimé	017 - Basé sur 34 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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