Affichage des archives de mercredi, 6 mars 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Mar 06 1258 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
06 Mar 2024	143	007
07 Mar 2024	144	010
08 Mar 2024	144	013

Régions solaires actives et éruptions solaires

The solar flaring activity was low during the last 24 hours with few low C-class flares. The strongest reported flares were two GOES C1.9 flares which peaked at 14:23 UTC and 22:29 UTC on Mar 05, both produced by NOAA Active Region (AR) 3598. During the flares, the source region (AR 3598) of the flares had beta configuration of its photospheric magnetic field. The solar flaring activity is expected to be at low to moderate levels over the next 24 hours with few C-class flares, and a low chance for M-class flares.

Éjection de masse coronale

Two narrow coronal mass ejection (CME) were observed in SOHO/LASCO-C2 images on NW limb at 20:30 UTC on Mar 05 (about 35 deg) and 00:18 UTC (about 35 deg) on Mar 06. The first CME possibly associated with brightening in the NOAA AR 3595 and the second one associated with a C1.4 flare from the same AR region. These two CMEs are not expected to arive to the Earth. A CME with source behind the SW limb was observed at 04:18 UTC on Mar 06. It is possibly associated with a type II radio burst observed at 03:33 UTC on Mar 06. As well as, a partial halo CME was observed in SOHO/LASCO-C2 images at 21:24 UTC on Mar 5. It is associated with a filament eruption on SE quadrant of the Sun. It has a projected speed of 520 km/s and a projected width of 138 degree (as measured by Cactus tool), with the bulk of the mass going strongly southward from the Sun-Earth line. Therefore only a glancing blow, associated with this CME, can be expected at the Earth on Mar 09. A coronal dimming is seen on SW quadrant around 10:08 UTC today, but we are awaiting for the corresponding coronagraph data for further analysis.

Trous coronaux

A small equatorial (negative polarity) coronal hole has crossed the central meridian on Mar 06. The solar wind from this coronal hole may enhance the solar wind environment near Earth on Mar 08.

Vent solaire

Earth is presently within the slow solar wind regime. The solar wind speed ranged between 350 km/s and 450 km/s. The North-South component (Bz) ranged between -6 and 5 nT. The interplanetary magnetic field ranged between 1 nT and 9 nT. Slow solar wind conditions are expected to continue over the next 24 hours.

Géomagnétisme

Geomagnetic conditions were globally quiet to unsettled conditions (NOAA Kp 1 to 3), and it was locally quiet (K BEL 1 to 2). Quiet to unsettled conditions are expected in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux was below the threshold level over the past 24 hours and is expected to remain so for the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was below the threshold level in the last 24 hours. It is expected that this parameter to remain below the threshold level in the next 24 hours. The 24h electron fluence is presently at normal level and is expected to remain so in the coming 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 101, sur la base de 15 stations.

Indices solaires pour 05 Mar 2024

Nombre de Wolf, observé par Catania	125
Flux solaire à 10 cm	142
AK Chambon La Forêt	014
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	111 - Basé sur 16 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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