Affichage des archives de mardi, 28 mars 2023

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2023 Mar 28 1231 UTC

Prévisions SIDC

Éruptions solaires

C-class flares expected, (probability >=50%)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
28 Mar 2023	165	004
29 Mar 2023	163	004
30 Mar 2023	160	009

Bulletin

The solar flaring activity was at low levels during the past 24 hours. A total of eight low C-class flares has been observed. The strongest flare reported was a GOES C3.6 flare originating from Catania group 29 (NOAA AR 3259) with peak time 20:46UT on March 27. There are eight numbered active regions observed on the visible side of the solar disk. Apart from Catania group 24 (NOAA AR 3256) which has a beta-gamma configuration of the photospheric magnetic field, all other regions have an alpha or beta configuration of their photospheric magnetic field. The solar flaring activity is expected to remain at low levels over the next 24 hours with C-class flares expected and a small possibility of M-class flaring.

During the last 24 hours there were no potentially Earth-directed coronal mass ejections detected in the available coronagraph observations.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours. The greater than 2 MeV electron flux has stayed around the 1000 pfu threshold for the past 24 hours. We expect it will start to decline over the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so over the next 24 hours.

The solar wind parameters of the last 24 hours still reflect conditions of the high speed stream that arrived on the 25th of March. We report values between 500 to 650km/s. The interplanetary magnetic field strength was about 5 nT during the last 24 hours. We expect to see a decline in the solar wind speed as we start to return towards slow solar wind conditions in the next 24 hours. From March 30 onwards, we are expecting the arrival of another high speed stream, associated with the negative polarity, equatorial coronal hole which is still crossing the central meridian today. Due to its location on the solar disk, we expect a strong impact.

During the last 24 hours, the geomagnetic conditions were quiet with the K and Kp values between 1-2 as reported by the local station at Dourbes and NOAA, respectively. Geomagnetic conditions are expected to remain quiet in the coming hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 143, sur la base de 15 stations.

Indices solaires pour 27 Mar 2023

Nombre de Wolf, observé par Catania	170
Flux solaire à 10 cm	158
AK Chambon La Forêt	006
AK Wingst	004
Ap estimé	002
Nombre international de taches solaires estimé	156 - Basé sur 25 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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