Affichage des archives de mardi, 17 mai 2022

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2022 May 17 1232 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
17 May 2022	161	006
18 May 2022	163	004
19 May 2022	161	003

Bulletin

Solar flaring activity was moderate during the last 24 hours, with an M2 event detected from NOAA Active Region (AR) 3017 (Catania group 15) at 16 Mar 13:27 UT. Numerous C-class flares were also detected in the past 24 hours, mostly from NOAA AR 3014 (Catania group 14). One or more isolated M-class flares and numerous C-class flares are expected in the next 24 hours, most likely from NOAA AR 3011, 3014, or 3017.

Numerous Coronal Mass Ejections (CME) were detected by LASCO-C2/SOHO during the last 24 hours. However, none of them appears to be geo-effective.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold and is expected to remain below this threshold during the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so.

The Solar Wind (SW) conditions (as measured by the DSCOVR and ACE satellites) are still typical of a fast SW regime. The SW speed varied between 460 and 600 km/s, during the last 24 hours. The total magnetic field varied between 3 and 11 nT, while its Bz component was measured between -8 and 11 nT during in the past 24 hours. The interplanetary magnetic field phi angle was predominantly positive (directed away from the Sun) during the last 24 hours. The solar wind conditions are expected to very gradually return to a slow wind regime.

Geomagnetic conditions were globally moderate (NOAA Kp index 1-3) and locally quiet (K Dourbes index 1-2). Geomagnetic conditions are expected to be moderate to quiet for the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 146, sur la base de 14 stations.

Indices solaires pour 16 May 2022

Nombre de Wolf, observé par Catania	189
Flux solaire à 10 cm	162
AK Chambon La Forêt	015
AK Wingst	013
Ap estimé	012
Nombre international de taches solaires estimé	145 - Basé sur 28 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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