Affichage des archives de vendredi, 19 juillet 2024

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2024 Jul 19 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
19 Jul 2024	210	005
20 Jul 2024	200	003
21 Jul 2024	195	003

Régions solaires actives et éruptions solaires

Solar flaring activity was moderate during the past 24 hours, with an M3.2 flare emitted from NOAA Active Region (AR) 3753 (magnetic configuration Beta, Catania sunspot group no 8) at 19 Jul 08:23 UTC. NOAA AR 3751 (magnetic configuration Beta-Gamma-Delta, Catania sunspot group no 12) produced most of the C-class flaring activity, including the second brightest flare, a C6 at 18 Jul 15:49 UTC. In the next 24 hours isolated M-class flare(s) are still likely to occur with a small chance of an X-class flare.

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 280 and 360 km/s, while the total interplanetary magnetic field (Bt) ranged between 2 and 6 nT during the past 24 hours. The North-South magnetic component (Bz) fluctuated between -4 and 4 nT, while the interplanetary magnetic field phi angle was directed predominantly away from the Sun in the past 24 hours. The SW conditions are expected to follow the slow SW 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 two three-hour periods of unsettled conditions (K BEL 3 at 18 Jul 12:00-15:00 UTC and at 19 Jul 09:00-12:00 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 expected to remain so.

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 : 280, sur la base de 21 stations.

Indices solaires pour 18 Jul 2024

Nombre de Wolf, observé par Catania	303
Flux solaire à 10 cm	209
AK Chambon La Forêt	010
AK Wingst	005
Ap estimé	006
Nombre international de taches solaires estimé	284 - Basé sur 23 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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