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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Jul 21 1231 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
21 Jul 2024	204	006
22 Jul 2024	206	003
23 Jul 2024	202	004

Régions solaires actives et éruptions solaires

Solar flaring activity was moderate with three M1 flares detected during the past 24 hours. NOAA Active Region (AR) 3744 (magnetic configuration Beta, Catania sunspot group no 96) produced the first two flares, an M1.5 at 20 Jul 18:49 UTC and an M1.4 at 21 Jul 03:55 UTC. NOAA AR 3751 (magnetic configuration Beta-Gamma-Delta, Catania sunspot group no 12) produced the third, an M1.5 at 21 Jul 08:34 UTC. Further M-class flaring activity is likely, mostly from the AR mentioned above, and there is a small chance of an X-class flare in the next 24 hours.

Éjection de masse coronale

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours.

Vent solaire

Solar Wind (SW) conditions remained typical of the slow SW regime during the past 24 hours. The SW speed varied between 310 and 380 km/s, while the total interplanetary magnetic field (Bt) ranged between 2 and 10 nT during the past 24 hours. The North-South magnetic component (Bz) fluctuated between -4 and 6 nT, while the interplanetary magnetic field phi angle was directed predominately towards the Sun in the past 24 hours. The SW conditions are expected to follow the same pattern for the next 24 hours.

Géomagnétisme

During the last 24 hours geomagnetic conditions were globally quiet (NOAA Kp 1 to 2+), while locally they had a brief period of unsettled conditions (K BEL 3 at 20 Jul 15:00-21:00 UTC). They are expected to remain quiet both globally and locally in the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is likely to remain so. Nevertheless, there is a small chance of a proton event associated with the activity of NOAA active region 3751.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was at nominal levels during the last 24 hours and is expected to remain at these levels during the next 24 hours. The 24h electron fluence was at very low levels during the past 24 hours and is expected to remain at these levels for the following 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 225, sur la base de 12 stations.

Indices solaires pour 20 Jul 2024

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	207
AK Chambon La Forêt	014
AK Wingst	009
Ap estimé	010
Nombre international de taches solaires estimé	232 - Basé sur 21 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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