Left: LASCO and EIT difference images at the time of the GOES M1.5 class flare of 2003 March 20 with the UVCS slit position superimposed. Middle: Brightness of the O vi 1032 line as a function of spatial position along the slit (horizontal direction) and time (vertical direction). The pre-event background was subtracted. Right: O vi 1032 Å intensity after subtraction of the pre-event intensity (red histogram) plotted against time for the same event. The GOES soft X-ray flux is plotted as a blue dashed line. The GOES hard X-ray flux is shown with the green dotted line. The left-hand scale applies to O vi, and the right-hand scale to GOES.