Affichage des archives de jeudi, 7 mars 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Mar 07 1249 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
07 Mar 2024	135	007
08 Mar 2024	134	022
09 Mar 2024	134	012

Régions solaires actives et éruptions solaires

The solar flaring activity was low during the last 24 hours with few C-class flares, all produced by NOAA Active Region (AR) 3599. The strongest reported flare was GOES C8.3 flare which peaked at 06:18 UTC on Mar 07. During the flare, the source region (AR 3599) of the flare had beta-gamma 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 chance for M-class flares.

Éjection de masse coronale

A coronal mass ejection (CME) was first observed in SOHO/LASCO-C2 images on 11:37 UTC on Mar 06. It is associated with a C1.0 flare from the NOAA AR 3592 and a nearby filament eruption. It has a projected speed of 260 km/s and a projected width of about 90 degrees. This eruption was followed by a subsequent small filament eruption on the east of central meridian (possibly triggered by the wave associated with the first filament eruption), an associated narrow CME was observed in LASCO-C2 images at 13:09. These CMEs are not expected to arrive at the Earth. There were no other Earth-directed CMEs detected in the available coronagraph observations during last 24 hour. A large filament eruption was observed on SE quadrant around 06:39 UTC today and a possibly associated CME could have Earth-directed components. We are awaiting for the corresponding coronagraph data for further analysis.

Trous coronaux

A small equatorial (negative polarity) coronal hole 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 430 km/s. The North-South component (Bz) ranged between -4 and 6 nT. The interplanetary magnetic field ranged between 0 nT and 7 nT. Slow solar wind conditions are expected to continue over the next 24 hours unless the high speed streams originating from the small equatorial (negative polarity) coronal hole, which started to cross the central meridian on Mar 05, impacts the Earth.

Géomagnétisme

Geomagnetic conditions were globally and locally at quiet to unsettled conditions (NOAA Kp and K BEL 1 to 3). In the next 24 hours, it is expected to remain so unless the high speed streams originating from the small equatorial (negative polarity) coronal hole, which started to cross the central meridian on Mar 05, impacts the Earth.

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 : 099, sur la base de 12 stations.

Indices solaires pour 06 Mar 2024

Nombre de Wolf, observé par Catania	126
Flux solaire à 10 cm	136
AK Chambon La Forêt	009
AK Wingst	006
Ap estimé	006
Nombre international de taches solaires estimé	100 - Basé sur 22 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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