(a) The pre-flare subtracted line profiles for O III 52.57 nm, (b) O V 62.96 nm, and (c) O VI 103.1 nm from 15:23:30 UT to 15:34:30 UT. The observation times are labeled on the right side of each profile and the y-axis is offset for a better illustration. The gray dashed lines indicate the level of spectral irradiance during the quiescent time. The vertical black lines indicate the rest wavelengths. The negative offset velocities represent the blue wings while the positive, the red.