By combining observations from several instruments, we can see an initial solar eruption and the ensuing, large cloud of particles that blasted into space over a 10-hour period (Feb. 9-10, 2012). Credit: NASA/GSFC/STEREO
A close look at the orange-colored Sun image in extreme UV light shows a filament that broke away from the Sun to the right. This event was associated with a bright coronal mass ejection (CME) starting around 18:00 UT as seen by the STEREO Behind spacecraft. This eruption also occurred in conjunction with a B3.7 flare (fairly small). This combination of observations shows just the Sun in extreme UV light superimposed on the COR1 coronagraph (green).