Affichage des archives de mardi, 4 août 2020

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2020 Aug 04 1231 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
04 Aug 2020	073	015
05 Aug 2020	073	009
06 Aug 2020	073	010

Bulletin

There are presently three numbered active regions observed on the visible side of the solar disc, NOAA AR 2768, 2769 and 2770. As all the active regions have simple, Alpha configuration of their photospheric magnetic field, and they did not produce any C-class or even B-class flares during last 24 hours. Nevertheless, the B-class and isolated C-class flares are still possible, although not very probable, in the coming hours. During last 24 hours there were no Earth directed CMEs and the solar protons remained at the background level.

Earth is still inside the fast solar wind. During last 24 hours the wind speed was fluctuating between 630 and 735 km/s, and its present value is 660 km/s. The interplanetary magnetic field magnitude is about 3 nT. As expected, the high solar wind speed together with the longer interval of negative value of the Bz component of interplanetary magnetic field induced active geomagnetic conditions. Local station at Dourbes reported K=4 around midnight and NOAA reported Kp=4 at around 6 UT this morning. As the solar wind speed is still high, we expect unsettled to possibly active geomagnetic conditions in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 011, sur la base de 24 stations.

Indices solaires pour 03 Aug 2020

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	073
AK Chambon La Forêt	026
AK Wingst	022
Ap estimé	023
Nombre international de taches solaires estimé	011 - Basé sur 31 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

<< Aller à l'aperçu quotidien