Jet speeds up when Fountain is erupting, with intervals about every 2-3 minutes. When Fountain ends, Jet usually stays quiet for over an hour. At other times, eruptions of Sizzler will stop Jets activity and it can be over an hour before Jet recovers from Sizzler's eruption and starts to play again. Unfortunately, it is rarely active. The last period of activity lasted about one week in 1994.
Morning is a fountain-type geyser.
It erupts through a large pool located directly behind Fountain Geyser . As might be expected, Fountain and Morning appear to be interconnected. Usually, Fountain goes dormant when Morning is active. In 1991 though, for a short period both Morning and Fountain were active at the same time and erupted together in some of the most spectacular eruptions seen. When active, Morning's intervals can be as short as three hours and it is often predictable.