Examples of temporal evolutions of bursts. The horizontal axis is labeled in Doppler velocities, while the vertical axis is given in seconds. Left: observation on Aug. 14, 2013, showing recurring bursts, visible in all spectral lines with absorption line blends. Right: observation on Oct. 11, 2013, showing that the first burst is an IB, while the second burst (∼20 min later) seems to occur higher in the atmosphere and thus has no absorption blend lines.