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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2021 Apr 01 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
01 Apr 2021	073	012
02 Apr 2021	073	016
03 Apr 2021	073	012

Bulletin

The solar activity has been quiet over the past 24 hours. The visible solar disc is spotless and the X-ray flux is below B-level. The solar activity is expected to remain at low levels over the next 24 hours.

No Earth-directed coronal mass ejections (CMEs) was observed in the available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux was below the 1000 pfu threshold in the past 24 hours and is expected to remain so during the next 24 hours. The 24h electron fluence is at normal levels in the last 24 hours and is expected to stay at normal levels for the next 24 hours.

The solar wind parameters (ACE and DSCOVR) were slightly enhanced due to the influence of the high-speed streams associated with small patchy equatorial coronal holes (in the south hemisphere, with negative polarity): The solar wind speed ranged between 335 km/s and 433 km/s . The interplanetary magnetic field magnitude reached 7.7 nT, and Bz components varied between -6.5 nT and 5.2 nT. The high-speed streams associated with the equatorial coronal hole (positive magnetic polarity and facing Earth on Mars 31) is expected to influence the solar wind conditions near Earth tomorrow, on April 2 and 3.

Geomagnetic conditions were quiet to unsettle (Kp and K-Dourbes: 1-3) due to the slight enhancement of the solar wind conditions. Quiet to unsettled conditions is expected to persist followed by possible periods of active conditions.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 000, sur la base de 20 stations.

Indices solaires pour 31 Mar 2021

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	074
AK Chambon La Forêt	021
AK Wingst	012
Ap estimé	012
Nombre international de taches solaires estimé	000 - Basé sur 39 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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