Affichage des archives de mercredi, 20 novembre 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Nov 20 1234 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 Nov 2024	160	010
21 Nov 2024	163	009
22 Nov 2024	165	011

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours. The largest flare was a C9.0 flare (SIDC Flare 2659) peaking on November 19 at 17:28 UTC, which was produced by SIDC Sunspot Group 298 (NOAA Active Regions 3901). This region was the most active along with SIDC Sunspot Group 316 (NOAA Active Region 3897), which exhibited strong flux emergence, but is now rotating over the west limb. SIDC Sunspot Group 318 (NOAA Active Region 3898) currently located at S17W11 continued to develop and increase in size over the period and has a Beta magnetic configuration. The solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares likely and a chance for X-class flares.

Éjection de masse coronale

No Earth-directed coronal mass ejections (CMEs) have been detected in the available coronagraph imagery over the past 24 hours.

Trous coronaux

SIDC Coronal Hole 80 (mid-latitude coronal hole with a negative polarity) has begun to cross the central meridian on November 20.

Vent solaire

Over the past 24 hours the solar wind conditions predominantly reflected a slow solar wind regime. The interplanetary magnetic field continued to be slightly elevated, ranging between 2 and 13nT, with a minimum Bz of -10 nT. The solar wind speed ranged between 350 km/s and 420 km/s. The interplanetary magnetic field phi angle remained predominantly in the positive sector (directed away from the Sun). Slow solar wind conditions are expected to continue over the next 24 hours.

Géomagnétisme

The geomagnetic conditions over the past 24 hours were quiet to unsettled, with one local isolated active period (Local K Bel = 4). Quiet to unsettled geomagnetic 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 was below the 10 pfu threshold. The greater than 10 MeV GOES proton flux is expected to continue to be below this threshold over the 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux as measured by GOES 18 was slightly elevated but remained below the 1000 pfu threshold briefly and is expected to remain below this threshold over the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so in the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 119, sur la base de 10 stations.

Indices solaires pour 19 Nov 2024

Nombre de Wolf, observé par Catania	138
Flux solaire à 10 cm	157
AK Chambon La Forêt	012
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	120 - Basé sur 08 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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