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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Jan 20 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
20 Jan 2024	156	007
21 Jan 2024	156	007
22 Jan 2024	156	007

Régions solaires actives et éruptions solaires

Solar flaring activity over the past 24 hours was at low levels with several B-class flares and few C class flares. The solar flaring activity is likely to be at low levels over the coming days with C-class flares and a very low possibility of M-class flares.

Éjection de masse coronale

Based on currently available coronagraph images several coronal mass ejections (CMEs) were observed. No Earth directed coronal mass ejections have been identified in the last 24 hours.

Trous coronaux

The small midlatitude coronal hole in the northern hemisphere (with positive magnetic polarity) is now on the solar meridian. It’s a high-speed stream may impact the solar condition near Earth today and tomorrow.

Vent solaire

Slow solar wind conditions were recorded over the past 24 hours. The solar wind speed as measured by DSCOVR ranged between 360 km/s and 500 km/s. The total interplanetary magnetic field was below 8 nT, and the Bz (north-south) component fluctuating between -7 nT and 5 nT. Slow solar wind conditions are expected for the next 24 hours. Then, influences from the high speed stream coronal hole may be observed in the solar wind parameters.

Géomagnétisme

The geomagnetic conditions over the past 24 hours were mostly quiet with some unsettled periods (NOAA-Kp and K-Bel 1-3). Mostly quiet conditions are expected in the next 24 hours. Then, unsettled to active condition may occur in response to the influences from the high speed stream coronal hole.

Niveaux de flux de protons

The greater than 10 MeV protons flux where at background levels. It is expected to be at background levels in the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV GOES 16 electron flux was below the 1000 pfu threshold and is expected to remain so in the next 24 hours. The 24h electron fluence was at nominal level and is expected to remain so in the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 124, sur la base de 11 stations.

Indices solaires pour 19 Jan 2024

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	157
AK Chambon La Forêt	014
AK Wingst	008
Ap estimé	007
Nombre international de taches solaires estimé	140 - 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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