Affichage des archives de lundi, 23 septembre 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Sep 23 1231 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
23 Sep 2024	163	007
24 Sep 2024	163	007
25 Sep 2024	163	032

Régions solaires actives et éruptions solaires

Solar flaring activity over the past 24 hours was moderate. There are seven numbered regions on the visible solar disc with NOAA ARs 3828 (beta-gamma), 3831 (beta) and 3835 (beta) being the most active in the last 24 hours. NOAA AR 3835 produced the strongest flare of the day, an M3.7 flare with peak at 21:39 UTC on 22 September. The solar flaring activity is likely to remain at moderate over the coming days, with more M-class flares possible.

Éjection de masse coronale

A partial halo CME with apparent angular width around 180 degrees erupted on 22 September at 21:37 UTC (first seen by LASCO C2), with a speed of around 1300 km/s. It is directed to the southeast but it has an Earth component that could hit the Earth around 6:00 UTC on 25 September, according to EUHFORIA.

Trous coronaux

A small equatorial positive polarity coronal hole crossed the central meridian on 21 September. A mild high speed stream may arrive at Earth on 25 September.

Vent solaire

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) were indicative of a slow solar wind regime. The interplanetary magnetic field was below 9 nT with a minimum Bz of -6 nT. The solar wind velocity decreased to about 380 km/s. Similar slow wind conditions are expected to continue for the next 24 hours.

Géomagnétisme

The geomagnetic conditions over the past 24 hours were quiet both globally and locally (Kp and K_Bel from 0 to 2). Similar conditions are expected for the next 24 hours.

Niveaux de flux de protons

Over the past 24 hours the greater than 10 MeV GOES proton flux has been at nominal levels and is expected to remain so over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux as measured by GOES 16 and GOES 18 has been slightly above the 1000 pfu threshold on 22 September. It is expected to be below threshold over the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain so over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 134, sur la base de 13 stations.

Indices solaires pour 22 Sep 2024

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	163
AK Chambon La Forêt	011
AK Wingst	005
Ap estimé	004
Nombre international de taches solaires estimé	143 - Basé sur 11 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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