Fig. 3
From: Validation of computed extreme ultraviolet emission spectra during solar flares
Examples of EUV flare line light curves. The light curves of each EUV flare line [Fe VIII, Fe XV, Fe XVI, Fe XVIII, Fe XX, and He II from the top to bottom panels] observed by the SDO/EVE MEGS-A for the M9.9-class flare on January 1, 2014. The solid black lines indicate the observed values with a 10 s cadence. The solid red lines indicate the 110 s running average values of the observed data. The 3-min average values (18:00–18:03) during the non-enhanced at the beginning of the hour before the flare were subtracted from each light curve as background. Each vertical dotted line indicates the flare start time, peak time, and end time, respectively, from left to right. The arrows indicate the peak times for each EUV flare line