manifestation de l'activité solaire

OBS: On croit que l'arrivée massive de particules solaires énergiques dans l'ozonosphère coïncide avec des épisodes d'activité à la surface du Soleil.

CONT: Solar activity increased to high levels. The X1 flare that occurred late yesterday was part of what is being called a ""major solar event"" ... An optical flare also occurred as well as a coronal mass ejection, a large disappearing active region filament, and a series of post flare loops. ... this series of phenomenon is what would typically be called a ""big flare event"" in solar-terrestrial physics. Numerous long duration radio bursts and sweeps were observed and a strong Proton event ensued shortly after the flare event