Misattributed NUV continuum enhancement caused by an unrecognized flare (27-10-2014 16:56–17:02), within a time series clipped around a GOES-reported M-class flare (vertical dotted blue line). The red stars represent the 5-minute segment excluded for GPR interpolation; and the magenta circle marks the detected enhancement. The black curve and blue-shaded region represent the GPR mean and 3σ confidence interval. The GOES X-ray flux is shown as the dotted blue curve.