Affichage des archives de dimanche, 5 août 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Aug 05 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
05 Aug 2018	071	010
06 Aug 2018	071	010
07 Aug 2018	071	011

Bulletin

Solar activity was at very low levels. The Sun was spotless. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Solar wind speed varied between 380 and 330 km/s, ending the period near 340 km/s (DSCOVR). Bz was near neutral values until midnight, when it started varying between -6 and +6 nT. The interplanetary magnetic field was mostly directed away from the Sun (positive sector) until around 04:30UT when it turned towards the Sun (negative sector), indicative of a possible sector boundary crossing. Quiet geomagnetic conditions were observed, with an isolated unsettled interval at Dourbes (06-09UT).

Geomagnetic activity is expected to continue at quiet to unsettled levels. In response to a weak wind stream associated with a small negative polarity equatorial coronal hole (CH), an active interval is possible on 5 or 6 August. Another wind stream enhancement associated with a small positive polarity equatorial CH may start influencing the earth environment around 7 August, which may result in an isolated active episode.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 22 stations.

Indices solaires pour 04 Aug 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	008
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	000 - 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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