Labial is a cone-type geyser. The shape and size of its eruptions are very similar to Aurum Geyser in the Upper Geyser Basin. Intervals vary from 5 to 9 hours. The average intervals from 2005 through 2009 varied from 5 3/4 to 7 hours. Durations are less than two minutes. Heights are about 25 feet. Post-eruptive spashing reaching 1 to 2 feet for up to an hour after the main eruption sometimes occurs.
As with most of the other geysers in the group, Labial was affected by the 1983 Borah Peak earthquake. Intervals prior to the earthquake exceeded 12 hours.