Deleted Teakettle Geyser

Deleted Teakettle Geyser is a small cone-type geyser situated on the North side of the Firehole River in the greater Sawmill Group, within the Upper Geyser Basin. It was apparently named when some park surveyor decided there were too many features named "Teakettle;" the intention was to delete the geyser's name from the record, but instead the "deleted" demarcation became part of the name.

Eruption Pattern
When active, eruptions can occur every few minutes and last about 1 minute, with surges reaching 2-3 feet.

When Deleted Teakettle erupts, the water level in the nearby Scalloped Spring drops slightly, and then quickly refills when it goes quiet.

History
Little is known about the eruption pattern of Deleted Teakettle before 1959, with the only record of an eruption being a 15-foot plume in a photo from 1915.

After the 1959 earthquake, it erupted frequently over a period of a few days, often reaching 10 feet. However, the activity diminished until in 1964 it rarely reached a height above 1 foot.

It is unclear how active this geyser was between the 1960s and the 2010s. It is likely that due to its small eruptions and uneven interval, many eruptions go unrecorded. However, small eruptions similar to the 1964 activity have been observed frequently since 2017.

Current Activity
As of August 2019, eruptions have been frequent from 2016 to present, with intervals as short as 10 minutes reported. Average intervals are probably not much longer than that; the much longer intervals and mean/median interval times reported on geysertimes.org no doubt result from Deleted Teakettle's small eruptions simply going unnoticed or unreported.