SOHO images showing the solar storm

(Left ) A Coronal Mass Ejection erupted from the Sun at 17:00 GMT (18:00 CET) on 4 November.
(Centre) Travelling at almost the speed of light, high energy protons arrived at SOHO at 18:37 GMT (19:37 CET), causing a “snowstorm” on the spacecraft’s imaging instruments.
(Right) By 6 November the number of incoming protons had significantly decreased.
Data courtesy of the SOHO/LASCO consortium