Single alert occurrence
The tooltip displays the name of the alert and its duration. The time range indicates the exact period when the alert was active.
Multiple alert occurrences
When an alert is triggered multiple times within the selected period, this tooltip shows the start time of each one of the occurrences and their duration. The time range above shows the interval when the two alerts were active, with the granularity of the units of the timeline. Thus, the interval displayed depends on the zoom of the device view.