Connecting Hβ and Hε QSEB detections in time. Four different cases are shown, and the duration of a QSEB detection is illustrated with colored bars. The spatial connection is not illustrated, but we assumed that the Hβ and Hε detections are spatially connected. The cases in panel (a) and (b) overlap temporally and are therefore clearly temporally connected. The cases in panels (c) and (d) have a time gap between the detections and need to satisfy a temporal condition in order to be considered a connected event.