Affichage des archives de mardi, 20 août 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Aug 20 1232 UTC

Prévisions SIDC

Éruptions solaires

M-class flares expected (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
20 Aug 2024	240	006
21 Aug 2024	235	007
22 Aug 2024	235	008

Régions solaires actives et éruptions solaires

Solar flaring activity was moderate over the past 24 hours. The largest flare was a M3.7-flare, with peak time 21:52 UTC on August 19 2024, from NOAA AR 3796 (beta-gamma). There are currently 11 numbered active regions on the visible disk. NOAA AR 3784 is the most complex AR (beta-gamma-delta). The solar flaring activity is expected to be at moderate levels for the next 24 hours with C-class flares expected and M-class flares probable and a chance of X-class flares.

Éjection de masse coronale

No new Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images.

Trous coronaux

A small negative polarity mid-latitude coronal hole started to cross the central meridian in the northern hemisphere. A high-speed stream from this coronal hole may enhance the solar wind environment near Earth on August 23.

Vent solaire

The solar wind at the Earth remained slow over the last 24 hours. The solar wind speed decreased from around 400 km/s to around 350 km/s and the interplanetary magnetic field was stable around 7nT. The Bz reached a minimum value of -6nT. Slow solar wind conditions are expected in the next 24h.

Géomagnétisme

Geomagnetic conditions were globally and locally quiet to unsettled (Kp 3+ and K Bel 3). Quiet conditions are expected in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux remained below the 10 pfu threshold and is expected to remain so over the next days.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold, and is expected to remain below the threshold during the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain so.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 221, sur la base de 22 stations.

Indices solaires pour 19 Aug 2024

Nombre de Wolf, observé par Catania	204
Flux solaire à 10 cm	239
AK Chambon La Forêt	024
AK Wingst	010
Ap estimé	010
Nombre international de taches solaires estimé	232 - Basé sur 21 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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