Affichage des archives de mercredi, 1 mars 2017

Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2017 Mar 01 1244 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Moderate (ISES: Major) magstorm expected (A>=50 or K=6)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
01 Mar 2017	082	030
02 Mar 2017	080	024
03 Mar 2017	079	016

Bulletin

Solar activity is low with only several B-class flares reported during last 24 hours. Majority of the flaring activity originated from the NOAA AR 2641 which presently has beta configuration of its photospheric magnetic field, and might be the source of B-class and isolated C-class flares in the coming hours. No Earth directed Coronal Mass Ejections have been detected, and the solar protons have remained at background level in the past 24 hours.

Since this morning Earth is inside the fast solar wind associated with the large and elongated extension of the southern polar coronal hole (across the solar equator and up to 20 degrees on the northern hemisphere), which reached the central meridian on February 25. The solar wind speed is presently about 550 km/s and still increasing. The interplanetary magnetic field magnitude is around 20 nt. The Bz component of the interplanetary magnetic filed is fluctuating, and it had its lowest value of -17 nT at about 11 UT today. As response to this low value of the Bz component and the fast solar wind, disturbed geomagnetic conditions were reported (NOAA reported Kp index Kp=5 and local station at Dourbes reported K=4). We expect disturbed geomagnetic conditions to continue in the coming hours, K=5 is very probable, but intervals of up to K=6 might be possible.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 057, sur la base de 13 stations.

Indices solaires pour 28 Feb 2017

Nombre de Wolf, observé par Catania	058
Flux solaire à 10 cm	082
AK Chambon La Forêt	016
AK Wingst	010
Ap estimé	009
Nombre international de taches solaires estimé	/// - Basé sur /// 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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