Affichage des archives de vendredi, 3 août 2018

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2018 Aug 03 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
03 Aug 2018	070	009
04 Aug 2018	071	011
05 Aug 2018	072	010

Bulletin

Solar activity was at very low levels. Region NOAA 2717 decayed, leaving the Sun spotless. Another active region is just beyond the east limb. This returning region was spotless during the previous rotation, raising the 10.7cm radio flux with a few solar flux units. 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 varied between 350 and 410 km/s (DSCOVR). Bz gradually changed from values near +6 nT at the beginning of the period to -4 nT around 09UT. The direction of the interplanetary magnetic field was variable, ending the period in a positive sector (away from the Sun). Quiet to unsettled geomagnetic conditions were observed.

Geomagnetic activity is expected to continue at quiet to unsettled levels until 4 or 5 August when a weak wind stream associated with a small negative polarity equatorial coronal hole (CH) may start influencing the earth environment. An isolated active episode is then possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 21 stations.

Indices solaires pour 02 Aug 2018

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	070
AK Chambon La Forêt	009
AK Wingst	007
Ap estimé	006
Nombre international de taches solaires estimé	012 - 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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